1 /* 2 * Copyright (c) 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved. 4 * Copyright (c) 2005 PathScale, Inc. All rights reserved. 5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include <linux/file.h> 37 #include <linux/fs.h> 38 #include <linux/slab.h> 39 #include <linux/sched.h> 40 41 #include <linux/uaccess.h> 42 43 #include <rdma/uverbs_types.h> 44 #include <rdma/uverbs_std_types.h> 45 #include "rdma_core.h" 46 47 #include "uverbs.h" 48 #include "core_priv.h" 49 50 /* 51 * Copy a response to userspace. If the provided 'resp' is larger than the 52 * user buffer it is silently truncated. If the user provided a larger buffer 53 * then the trailing portion is zero filled. 54 * 55 * These semantics are intended to support future extension of the output 56 * structures. 57 */ 58 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp, 59 size_t resp_len) 60 { 61 int ret; 62 63 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 64 return uverbs_copy_to_struct_or_zero( 65 attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len); 66 67 if (copy_to_user(attrs->ucore.outbuf, resp, 68 min(attrs->ucore.outlen, resp_len))) 69 return -EFAULT; 70 71 if (resp_len < attrs->ucore.outlen) { 72 /* 73 * Zero fill any extra memory that user 74 * space might have provided. 75 */ 76 ret = clear_user(attrs->ucore.outbuf + resp_len, 77 attrs->ucore.outlen - resp_len); 78 if (ret) 79 return -EFAULT; 80 } 81 82 return 0; 83 } 84 85 /* 86 * Copy a request from userspace. If the provided 'req' is larger than the 87 * user buffer then the user buffer is zero extended into the 'req'. If 'req' 88 * is smaller than the user buffer then the uncopied bytes in the user buffer 89 * must be zero. 90 */ 91 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req, 92 size_t req_len) 93 { 94 if (copy_from_user(req, attrs->ucore.inbuf, 95 min(attrs->ucore.inlen, req_len))) 96 return -EFAULT; 97 98 if (attrs->ucore.inlen < req_len) { 99 memset(req + attrs->ucore.inlen, 0, 100 req_len - attrs->ucore.inlen); 101 } else if (attrs->ucore.inlen > req_len) { 102 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len, 103 attrs->ucore.inlen - req_len)) 104 return -EOPNOTSUPP; 105 } 106 return 0; 107 } 108 109 /* 110 * Generate the value for the 'response_length' protocol used by write_ex. 111 * This is the number of bytes the kernel actually wrote. Userspace can use 112 * this to detect what structure members in the response the kernel 113 * understood. 114 */ 115 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs, 116 size_t resp_len) 117 { 118 return min_t(size_t, attrs->ucore.outlen, resp_len); 119 } 120 121 /* 122 * The iterator version of the request interface is for handlers that need to 123 * step over a flex array at the end of a command header. 124 */ 125 struct uverbs_req_iter { 126 const void __user *cur; 127 const void __user *end; 128 }; 129 130 static int uverbs_request_start(struct uverbs_attr_bundle *attrs, 131 struct uverbs_req_iter *iter, 132 void *req, 133 size_t req_len) 134 { 135 if (attrs->ucore.inlen < req_len) 136 return -ENOSPC; 137 138 if (copy_from_user(req, attrs->ucore.inbuf, req_len)) 139 return -EFAULT; 140 141 iter->cur = attrs->ucore.inbuf + req_len; 142 iter->end = attrs->ucore.inbuf + attrs->ucore.inlen; 143 return 0; 144 } 145 146 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val, 147 size_t len) 148 { 149 if (iter->cur + len > iter->end) 150 return -ENOSPC; 151 152 if (copy_from_user(val, iter->cur, len)) 153 return -EFAULT; 154 155 iter->cur += len; 156 return 0; 157 } 158 159 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter, 160 size_t len) 161 { 162 const void __user *res = iter->cur; 163 164 if (iter->cur + len > iter->end) 165 return (void __force __user *)ERR_PTR(-ENOSPC); 166 iter->cur += len; 167 return res; 168 } 169 170 static int uverbs_request_finish(struct uverbs_req_iter *iter) 171 { 172 if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur)) 173 return -EOPNOTSUPP; 174 return 0; 175 } 176 177 /* 178 * When calling a destroy function during an error unwind we need to pass in 179 * the udata that is sanitized of all user arguments. Ie from the driver 180 * perspective it looks like no udata was passed. 181 */ 182 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs) 183 { 184 attrs->driver_udata = (struct ib_udata){}; 185 return &attrs->driver_udata; 186 } 187 188 static struct ib_uverbs_completion_event_file * 189 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs) 190 { 191 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL, 192 fd, attrs); 193 194 if (IS_ERR(uobj)) 195 return (void *)uobj; 196 197 uverbs_uobject_get(uobj); 198 uobj_put_read(uobj); 199 200 return container_of(uobj, struct ib_uverbs_completion_event_file, 201 uobj); 202 } 203 #define ib_uverbs_lookup_comp_file(_fd, _ufile) \ 204 _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile) 205 206 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs) 207 { 208 struct ib_uverbs_file *ufile = attrs->ufile; 209 struct ib_ucontext *ucontext; 210 struct ib_device *ib_dev; 211 212 ib_dev = srcu_dereference(ufile->device->ib_dev, 213 &ufile->device->disassociate_srcu); 214 if (!ib_dev) 215 return -EIO; 216 217 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext); 218 if (!ucontext) 219 return -ENOMEM; 220 221 ucontext->device = ib_dev; 222 ucontext->ufile = ufile; 223 xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC); 224 225 rdma_restrack_new(&ucontext->res, RDMA_RESTRACK_CTX); 226 rdma_restrack_set_name(&ucontext->res, NULL); 227 attrs->context = ucontext; 228 return 0; 229 } 230 231 int ib_init_ucontext(struct uverbs_attr_bundle *attrs) 232 { 233 struct ib_ucontext *ucontext = attrs->context; 234 struct ib_uverbs_file *file = attrs->ufile; 235 int ret; 236 237 if (!down_read_trylock(&file->hw_destroy_rwsem)) 238 return -EIO; 239 mutex_lock(&file->ucontext_lock); 240 if (file->ucontext) { 241 ret = -EINVAL; 242 goto err; 243 } 244 245 ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device, 246 RDMACG_RESOURCE_HCA_HANDLE); 247 if (ret) 248 goto err; 249 250 ret = ucontext->device->ops.alloc_ucontext(ucontext, 251 &attrs->driver_udata); 252 if (ret) 253 goto err_uncharge; 254 255 rdma_restrack_add(&ucontext->res); 256 257 /* 258 * Make sure that ib_uverbs_get_ucontext() sees the pointer update 259 * only after all writes to setup the ucontext have completed 260 */ 261 smp_store_release(&file->ucontext, ucontext); 262 263 mutex_unlock(&file->ucontext_lock); 264 up_read(&file->hw_destroy_rwsem); 265 return 0; 266 267 err_uncharge: 268 ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device, 269 RDMACG_RESOURCE_HCA_HANDLE); 270 err: 271 mutex_unlock(&file->ucontext_lock); 272 up_read(&file->hw_destroy_rwsem); 273 return ret; 274 } 275 276 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs) 277 { 278 struct ib_uverbs_get_context_resp resp; 279 struct ib_uverbs_get_context cmd; 280 struct ib_device *ib_dev; 281 struct ib_uobject *uobj; 282 int ret; 283 284 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 285 if (ret) 286 return ret; 287 288 ret = ib_alloc_ucontext(attrs); 289 if (ret) 290 return ret; 291 292 uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev); 293 if (IS_ERR(uobj)) { 294 ret = PTR_ERR(uobj); 295 goto err_ucontext; 296 } 297 298 resp = (struct ib_uverbs_get_context_resp){ 299 .num_comp_vectors = attrs->ufile->device->num_comp_vectors, 300 .async_fd = uobj->id, 301 }; 302 ret = uverbs_response(attrs, &resp, sizeof(resp)); 303 if (ret) 304 goto err_uobj; 305 306 ret = ib_init_ucontext(attrs); 307 if (ret) 308 goto err_uobj; 309 310 ib_uverbs_init_async_event_file( 311 container_of(uobj, struct ib_uverbs_async_event_file, uobj)); 312 rdma_alloc_commit_uobject(uobj, attrs); 313 return 0; 314 315 err_uobj: 316 rdma_alloc_abort_uobject(uobj, attrs, false); 317 err_ucontext: 318 rdma_restrack_put(&attrs->context->res); 319 kfree(attrs->context); 320 attrs->context = NULL; 321 return ret; 322 } 323 324 static void copy_query_dev_fields(struct ib_ucontext *ucontext, 325 struct ib_uverbs_query_device_resp *resp, 326 struct ib_device_attr *attr) 327 { 328 struct ib_device *ib_dev = ucontext->device; 329 330 resp->fw_ver = attr->fw_ver; 331 resp->node_guid = ib_dev->node_guid; 332 resp->sys_image_guid = attr->sys_image_guid; 333 resp->max_mr_size = attr->max_mr_size; 334 resp->page_size_cap = attr->page_size_cap; 335 resp->vendor_id = attr->vendor_id; 336 resp->vendor_part_id = attr->vendor_part_id; 337 resp->hw_ver = attr->hw_ver; 338 resp->max_qp = attr->max_qp; 339 resp->max_qp_wr = attr->max_qp_wr; 340 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags); 341 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge); 342 resp->max_sge_rd = attr->max_sge_rd; 343 resp->max_cq = attr->max_cq; 344 resp->max_cqe = attr->max_cqe; 345 resp->max_mr = attr->max_mr; 346 resp->max_pd = attr->max_pd; 347 resp->max_qp_rd_atom = attr->max_qp_rd_atom; 348 resp->max_ee_rd_atom = attr->max_ee_rd_atom; 349 resp->max_res_rd_atom = attr->max_res_rd_atom; 350 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; 351 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; 352 resp->atomic_cap = attr->atomic_cap; 353 resp->max_ee = attr->max_ee; 354 resp->max_rdd = attr->max_rdd; 355 resp->max_mw = attr->max_mw; 356 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; 357 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; 358 resp->max_mcast_grp = attr->max_mcast_grp; 359 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; 360 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; 361 resp->max_ah = attr->max_ah; 362 resp->max_srq = attr->max_srq; 363 resp->max_srq_wr = attr->max_srq_wr; 364 resp->max_srq_sge = attr->max_srq_sge; 365 resp->max_pkeys = attr->max_pkeys; 366 resp->local_ca_ack_delay = attr->local_ca_ack_delay; 367 resp->phys_port_cnt = min_t(u32, ib_dev->phys_port_cnt, U8_MAX); 368 } 369 370 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs) 371 { 372 struct ib_uverbs_query_device cmd; 373 struct ib_uverbs_query_device_resp resp; 374 struct ib_ucontext *ucontext; 375 int ret; 376 377 ucontext = ib_uverbs_get_ucontext(attrs); 378 if (IS_ERR(ucontext)) 379 return PTR_ERR(ucontext); 380 381 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 382 if (ret) 383 return ret; 384 385 memset(&resp, 0, sizeof resp); 386 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs); 387 388 return uverbs_response(attrs, &resp, sizeof(resp)); 389 } 390 391 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs) 392 { 393 struct ib_uverbs_query_port cmd; 394 struct ib_uverbs_query_port_resp resp; 395 struct ib_port_attr attr; 396 int ret; 397 struct ib_ucontext *ucontext; 398 struct ib_device *ib_dev; 399 400 ucontext = ib_uverbs_get_ucontext(attrs); 401 if (IS_ERR(ucontext)) 402 return PTR_ERR(ucontext); 403 ib_dev = ucontext->device; 404 405 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 406 if (ret) 407 return ret; 408 409 ret = ib_query_port(ib_dev, cmd.port_num, &attr); 410 if (ret) 411 return ret; 412 413 memset(&resp, 0, sizeof resp); 414 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num); 415 416 return uverbs_response(attrs, &resp, sizeof(resp)); 417 } 418 419 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs) 420 { 421 struct ib_uverbs_alloc_pd_resp resp = {}; 422 struct ib_uverbs_alloc_pd cmd; 423 struct ib_uobject *uobj; 424 struct ib_pd *pd; 425 int ret; 426 struct ib_device *ib_dev; 427 428 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 429 if (ret) 430 return ret; 431 432 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev); 433 if (IS_ERR(uobj)) 434 return PTR_ERR(uobj); 435 436 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd); 437 if (!pd) { 438 ret = -ENOMEM; 439 goto err; 440 } 441 442 pd->device = ib_dev; 443 pd->uobject = uobj; 444 atomic_set(&pd->usecnt, 0); 445 446 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD); 447 rdma_restrack_set_name(&pd->res, NULL); 448 449 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata); 450 if (ret) 451 goto err_alloc; 452 rdma_restrack_add(&pd->res); 453 454 uobj->object = pd; 455 uobj_finalize_uobj_create(uobj, attrs); 456 457 resp.pd_handle = uobj->id; 458 return uverbs_response(attrs, &resp, sizeof(resp)); 459 460 err_alloc: 461 rdma_restrack_put(&pd->res); 462 kfree(pd); 463 err: 464 uobj_alloc_abort(uobj, attrs); 465 return ret; 466 } 467 468 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs) 469 { 470 struct ib_uverbs_dealloc_pd cmd; 471 int ret; 472 473 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 474 if (ret) 475 return ret; 476 477 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 478 } 479 480 struct xrcd_table_entry { 481 struct rb_node node; 482 struct ib_xrcd *xrcd; 483 struct inode *inode; 484 }; 485 486 static int xrcd_table_insert(struct ib_uverbs_device *dev, 487 struct inode *inode, 488 struct ib_xrcd *xrcd) 489 { 490 struct xrcd_table_entry *entry, *scan; 491 struct rb_node **p = &dev->xrcd_tree.rb_node; 492 struct rb_node *parent = NULL; 493 494 entry = kmalloc(sizeof *entry, GFP_KERNEL); 495 if (!entry) 496 return -ENOMEM; 497 498 entry->xrcd = xrcd; 499 entry->inode = inode; 500 501 while (*p) { 502 parent = *p; 503 scan = rb_entry(parent, struct xrcd_table_entry, node); 504 505 if (inode < scan->inode) { 506 p = &(*p)->rb_left; 507 } else if (inode > scan->inode) { 508 p = &(*p)->rb_right; 509 } else { 510 kfree(entry); 511 return -EEXIST; 512 } 513 } 514 515 rb_link_node(&entry->node, parent, p); 516 rb_insert_color(&entry->node, &dev->xrcd_tree); 517 igrab(inode); 518 return 0; 519 } 520 521 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, 522 struct inode *inode) 523 { 524 struct xrcd_table_entry *entry; 525 struct rb_node *p = dev->xrcd_tree.rb_node; 526 527 while (p) { 528 entry = rb_entry(p, struct xrcd_table_entry, node); 529 530 if (inode < entry->inode) 531 p = p->rb_left; 532 else if (inode > entry->inode) 533 p = p->rb_right; 534 else 535 return entry; 536 } 537 538 return NULL; 539 } 540 541 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) 542 { 543 struct xrcd_table_entry *entry; 544 545 entry = xrcd_table_search(dev, inode); 546 if (!entry) 547 return NULL; 548 549 return entry->xrcd; 550 } 551 552 static void xrcd_table_delete(struct ib_uverbs_device *dev, 553 struct inode *inode) 554 { 555 struct xrcd_table_entry *entry; 556 557 entry = xrcd_table_search(dev, inode); 558 if (entry) { 559 iput(inode); 560 rb_erase(&entry->node, &dev->xrcd_tree); 561 kfree(entry); 562 } 563 } 564 565 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs) 566 { 567 struct ib_uverbs_device *ibudev = attrs->ufile->device; 568 struct ib_uverbs_open_xrcd_resp resp = {}; 569 struct ib_uverbs_open_xrcd cmd; 570 struct ib_uxrcd_object *obj; 571 struct ib_xrcd *xrcd = NULL; 572 struct inode *inode = NULL; 573 int new_xrcd = 0; 574 struct ib_device *ib_dev; 575 struct fd f = {}; 576 int ret; 577 578 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 579 if (ret) 580 return ret; 581 582 mutex_lock(&ibudev->xrcd_tree_mutex); 583 584 if (cmd.fd != -1) { 585 /* search for file descriptor */ 586 f = fdget(cmd.fd); 587 if (!f.file) { 588 ret = -EBADF; 589 goto err_tree_mutex_unlock; 590 } 591 592 inode = file_inode(f.file); 593 xrcd = find_xrcd(ibudev, inode); 594 if (!xrcd && !(cmd.oflags & O_CREAT)) { 595 /* no file descriptor. Need CREATE flag */ 596 ret = -EAGAIN; 597 goto err_tree_mutex_unlock; 598 } 599 600 if (xrcd && cmd.oflags & O_EXCL) { 601 ret = -EINVAL; 602 goto err_tree_mutex_unlock; 603 } 604 } 605 606 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs, 607 &ib_dev); 608 if (IS_ERR(obj)) { 609 ret = PTR_ERR(obj); 610 goto err_tree_mutex_unlock; 611 } 612 613 if (!xrcd) { 614 xrcd = ib_alloc_xrcd_user(ib_dev, inode, &attrs->driver_udata); 615 if (IS_ERR(xrcd)) { 616 ret = PTR_ERR(xrcd); 617 goto err; 618 } 619 new_xrcd = 1; 620 } 621 622 atomic_set(&obj->refcnt, 0); 623 obj->uobject.object = xrcd; 624 625 if (inode) { 626 if (new_xrcd) { 627 /* create new inode/xrcd table entry */ 628 ret = xrcd_table_insert(ibudev, inode, xrcd); 629 if (ret) 630 goto err_dealloc_xrcd; 631 } 632 atomic_inc(&xrcd->usecnt); 633 } 634 635 if (f.file) 636 fdput(f); 637 638 mutex_unlock(&ibudev->xrcd_tree_mutex); 639 uobj_finalize_uobj_create(&obj->uobject, attrs); 640 641 resp.xrcd_handle = obj->uobject.id; 642 return uverbs_response(attrs, &resp, sizeof(resp)); 643 644 err_dealloc_xrcd: 645 ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs)); 646 647 err: 648 uobj_alloc_abort(&obj->uobject, attrs); 649 650 err_tree_mutex_unlock: 651 if (f.file) 652 fdput(f); 653 654 mutex_unlock(&ibudev->xrcd_tree_mutex); 655 656 return ret; 657 } 658 659 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) 660 { 661 struct ib_uverbs_close_xrcd cmd; 662 int ret; 663 664 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 665 if (ret) 666 return ret; 667 668 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); 669 } 670 671 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, 672 enum rdma_remove_reason why, 673 struct uverbs_attr_bundle *attrs) 674 { 675 struct inode *inode; 676 int ret; 677 struct ib_uverbs_device *dev = attrs->ufile->device; 678 679 inode = xrcd->inode; 680 if (inode && !atomic_dec_and_test(&xrcd->usecnt)) 681 return 0; 682 683 ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata); 684 if (ret) { 685 atomic_inc(&xrcd->usecnt); 686 return ret; 687 } 688 689 if (inode) 690 xrcd_table_delete(dev, inode); 691 692 return 0; 693 } 694 695 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) 696 { 697 struct ib_uverbs_reg_mr_resp resp = {}; 698 struct ib_uverbs_reg_mr cmd; 699 struct ib_uobject *uobj; 700 struct ib_pd *pd; 701 struct ib_mr *mr; 702 int ret; 703 struct ib_device *ib_dev; 704 705 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 706 if (ret) 707 return ret; 708 709 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 710 return -EINVAL; 711 712 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 713 if (IS_ERR(uobj)) 714 return PTR_ERR(uobj); 715 716 ret = ib_check_mr_access(ib_dev, cmd.access_flags); 717 if (ret) 718 goto err_free; 719 720 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 721 if (!pd) { 722 ret = -EINVAL; 723 goto err_free; 724 } 725 726 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 727 cmd.access_flags, 728 &attrs->driver_udata); 729 if (IS_ERR(mr)) { 730 ret = PTR_ERR(mr); 731 goto err_put; 732 } 733 734 mr->device = pd->device; 735 mr->pd = pd; 736 mr->type = IB_MR_TYPE_USER; 737 mr->dm = NULL; 738 mr->sig_attrs = NULL; 739 mr->uobject = uobj; 740 atomic_inc(&pd->usecnt); 741 mr->iova = cmd.hca_va; 742 743 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 744 rdma_restrack_set_name(&mr->res, NULL); 745 rdma_restrack_add(&mr->res); 746 747 uobj->object = mr; 748 uobj_put_obj_read(pd); 749 uobj_finalize_uobj_create(uobj, attrs); 750 751 resp.lkey = mr->lkey; 752 resp.rkey = mr->rkey; 753 resp.mr_handle = uobj->id; 754 return uverbs_response(attrs, &resp, sizeof(resp)); 755 756 err_put: 757 uobj_put_obj_read(pd); 758 err_free: 759 uobj_alloc_abort(uobj, attrs); 760 return ret; 761 } 762 763 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 764 { 765 struct ib_uverbs_rereg_mr cmd; 766 struct ib_uverbs_rereg_mr_resp resp; 767 struct ib_mr *mr; 768 int ret; 769 struct ib_uobject *uobj; 770 struct ib_uobject *new_uobj; 771 struct ib_device *ib_dev; 772 struct ib_pd *orig_pd; 773 struct ib_pd *new_pd; 774 struct ib_mr *new_mr; 775 776 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 777 if (ret) 778 return ret; 779 780 if (!cmd.flags) 781 return -EINVAL; 782 783 if (cmd.flags & ~IB_MR_REREG_SUPPORTED) 784 return -EOPNOTSUPP; 785 786 if ((cmd.flags & IB_MR_REREG_TRANS) && 787 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 788 return -EINVAL; 789 790 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 791 if (IS_ERR(uobj)) 792 return PTR_ERR(uobj); 793 794 mr = uobj->object; 795 796 if (mr->dm) { 797 ret = -EINVAL; 798 goto put_uobjs; 799 } 800 801 if (cmd.flags & IB_MR_REREG_ACCESS) { 802 ret = ib_check_mr_access(mr->device, cmd.access_flags); 803 if (ret) 804 goto put_uobjs; 805 } 806 807 orig_pd = mr->pd; 808 if (cmd.flags & IB_MR_REREG_PD) { 809 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 810 attrs); 811 if (!new_pd) { 812 ret = -EINVAL; 813 goto put_uobjs; 814 } 815 } else { 816 new_pd = mr->pd; 817 } 818 819 /* 820 * The driver might create a new HW object as part of the rereg, we need 821 * to have a uobject ready to hold it. 822 */ 823 new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 824 if (IS_ERR(new_uobj)) { 825 ret = PTR_ERR(new_uobj); 826 goto put_uobj_pd; 827 } 828 829 new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length, 830 cmd.hca_va, cmd.access_flags, new_pd, 831 &attrs->driver_udata); 832 if (IS_ERR(new_mr)) { 833 ret = PTR_ERR(new_mr); 834 goto put_new_uobj; 835 } 836 if (new_mr) { 837 new_mr->device = new_pd->device; 838 new_mr->pd = new_pd; 839 new_mr->type = IB_MR_TYPE_USER; 840 new_mr->dm = NULL; 841 new_mr->sig_attrs = NULL; 842 new_mr->uobject = uobj; 843 atomic_inc(&new_pd->usecnt); 844 new_mr->iova = cmd.hca_va; 845 new_uobj->object = new_mr; 846 847 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR); 848 rdma_restrack_set_name(&new_mr->res, NULL); 849 rdma_restrack_add(&new_mr->res); 850 851 /* 852 * The new uobj for the new HW object is put into the same spot 853 * in the IDR and the old uobj & HW object is deleted. 854 */ 855 rdma_assign_uobject(uobj, new_uobj, attrs); 856 rdma_alloc_commit_uobject(new_uobj, attrs); 857 uobj_put_destroy(uobj); 858 new_uobj = NULL; 859 uobj = NULL; 860 mr = new_mr; 861 } else { 862 if (cmd.flags & IB_MR_REREG_PD) { 863 atomic_dec(&orig_pd->usecnt); 864 mr->pd = new_pd; 865 atomic_inc(&new_pd->usecnt); 866 } 867 if (cmd.flags & IB_MR_REREG_TRANS) 868 mr->iova = cmd.hca_va; 869 } 870 871 memset(&resp, 0, sizeof(resp)); 872 resp.lkey = mr->lkey; 873 resp.rkey = mr->rkey; 874 875 ret = uverbs_response(attrs, &resp, sizeof(resp)); 876 877 put_new_uobj: 878 if (new_uobj) 879 uobj_alloc_abort(new_uobj, attrs); 880 put_uobj_pd: 881 if (cmd.flags & IB_MR_REREG_PD) 882 uobj_put_obj_read(new_pd); 883 884 put_uobjs: 885 if (uobj) 886 uobj_put_write(uobj); 887 888 return ret; 889 } 890 891 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) 892 { 893 struct ib_uverbs_dereg_mr cmd; 894 int ret; 895 896 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 897 if (ret) 898 return ret; 899 900 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 901 } 902 903 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 904 { 905 struct ib_uverbs_alloc_mw cmd; 906 struct ib_uverbs_alloc_mw_resp resp = {}; 907 struct ib_uobject *uobj; 908 struct ib_pd *pd; 909 struct ib_mw *mw; 910 int ret; 911 struct ib_device *ib_dev; 912 913 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 914 if (ret) 915 return ret; 916 917 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 918 if (IS_ERR(uobj)) 919 return PTR_ERR(uobj); 920 921 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 922 if (!pd) { 923 ret = -EINVAL; 924 goto err_free; 925 } 926 927 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 928 ret = -EINVAL; 929 goto err_put; 930 } 931 932 mw = rdma_zalloc_drv_obj(ib_dev, ib_mw); 933 if (!mw) { 934 ret = -ENOMEM; 935 goto err_put; 936 } 937 938 mw->device = ib_dev; 939 mw->pd = pd; 940 mw->uobject = uobj; 941 mw->type = cmd.mw_type; 942 943 ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata); 944 if (ret) 945 goto err_alloc; 946 947 atomic_inc(&pd->usecnt); 948 949 uobj->object = mw; 950 uobj_put_obj_read(pd); 951 uobj_finalize_uobj_create(uobj, attrs); 952 953 resp.rkey = mw->rkey; 954 resp.mw_handle = uobj->id; 955 return uverbs_response(attrs, &resp, sizeof(resp)); 956 957 err_alloc: 958 kfree(mw); 959 err_put: 960 uobj_put_obj_read(pd); 961 err_free: 962 uobj_alloc_abort(uobj, attrs); 963 return ret; 964 } 965 966 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) 967 { 968 struct ib_uverbs_dealloc_mw cmd; 969 int ret; 970 971 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 972 if (ret) 973 return ret; 974 975 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); 976 } 977 978 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) 979 { 980 struct ib_uverbs_create_comp_channel cmd; 981 struct ib_uverbs_create_comp_channel_resp resp; 982 struct ib_uobject *uobj; 983 struct ib_uverbs_completion_event_file *ev_file; 984 struct ib_device *ib_dev; 985 int ret; 986 987 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 988 if (ret) 989 return ret; 990 991 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); 992 if (IS_ERR(uobj)) 993 return PTR_ERR(uobj); 994 995 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, 996 uobj); 997 ib_uverbs_init_event_queue(&ev_file->ev_queue); 998 uobj_finalize_uobj_create(uobj, attrs); 999 1000 resp.fd = uobj->id; 1001 return uverbs_response(attrs, &resp, sizeof(resp)); 1002 } 1003 1004 static int create_cq(struct uverbs_attr_bundle *attrs, 1005 struct ib_uverbs_ex_create_cq *cmd) 1006 { 1007 struct ib_ucq_object *obj; 1008 struct ib_uverbs_completion_event_file *ev_file = NULL; 1009 struct ib_cq *cq; 1010 int ret; 1011 struct ib_uverbs_ex_create_cq_resp resp = {}; 1012 struct ib_cq_init_attr attr = {}; 1013 struct ib_device *ib_dev; 1014 1015 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) 1016 return -EINVAL; 1017 1018 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, 1019 &ib_dev); 1020 if (IS_ERR(obj)) 1021 return PTR_ERR(obj); 1022 1023 if (cmd->comp_channel >= 0) { 1024 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); 1025 if (IS_ERR(ev_file)) { 1026 ret = PTR_ERR(ev_file); 1027 goto err; 1028 } 1029 } 1030 1031 obj->uevent.uobject.user_handle = cmd->user_handle; 1032 INIT_LIST_HEAD(&obj->comp_list); 1033 INIT_LIST_HEAD(&obj->uevent.event_list); 1034 1035 attr.cqe = cmd->cqe; 1036 attr.comp_vector = cmd->comp_vector; 1037 attr.flags = cmd->flags; 1038 1039 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 1040 if (!cq) { 1041 ret = -ENOMEM; 1042 goto err_file; 1043 } 1044 cq->device = ib_dev; 1045 cq->uobject = obj; 1046 cq->comp_handler = ib_uverbs_comp_handler; 1047 cq->event_handler = ib_uverbs_cq_event_handler; 1048 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 1049 atomic_set(&cq->usecnt, 0); 1050 1051 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ); 1052 rdma_restrack_set_name(&cq->res, NULL); 1053 1054 ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata); 1055 if (ret) 1056 goto err_free; 1057 rdma_restrack_add(&cq->res); 1058 1059 obj->uevent.uobject.object = cq; 1060 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1061 if (obj->uevent.event_file) 1062 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1063 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1064 1065 resp.base.cq_handle = obj->uevent.uobject.id; 1066 resp.base.cqe = cq->cqe; 1067 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1068 return uverbs_response(attrs, &resp, sizeof(resp)); 1069 1070 err_free: 1071 rdma_restrack_put(&cq->res); 1072 kfree(cq); 1073 err_file: 1074 if (ev_file) 1075 ib_uverbs_release_ucq(ev_file, obj); 1076 err: 1077 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1078 return ret; 1079 } 1080 1081 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) 1082 { 1083 struct ib_uverbs_create_cq cmd; 1084 struct ib_uverbs_ex_create_cq cmd_ex; 1085 int ret; 1086 1087 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1088 if (ret) 1089 return ret; 1090 1091 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1092 cmd_ex.user_handle = cmd.user_handle; 1093 cmd_ex.cqe = cmd.cqe; 1094 cmd_ex.comp_vector = cmd.comp_vector; 1095 cmd_ex.comp_channel = cmd.comp_channel; 1096 1097 return create_cq(attrs, &cmd_ex); 1098 } 1099 1100 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) 1101 { 1102 struct ib_uverbs_ex_create_cq cmd; 1103 int ret; 1104 1105 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1106 if (ret) 1107 return ret; 1108 1109 if (cmd.comp_mask) 1110 return -EINVAL; 1111 1112 if (cmd.reserved) 1113 return -EINVAL; 1114 1115 return create_cq(attrs, &cmd); 1116 } 1117 1118 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) 1119 { 1120 struct ib_uverbs_resize_cq cmd; 1121 struct ib_uverbs_resize_cq_resp resp = {}; 1122 struct ib_cq *cq; 1123 int ret; 1124 1125 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1126 if (ret) 1127 return ret; 1128 1129 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1130 if (!cq) 1131 return -EINVAL; 1132 1133 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); 1134 if (ret) 1135 goto out; 1136 1137 resp.cqe = cq->cqe; 1138 1139 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1140 out: 1141 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1142 UVERBS_LOOKUP_READ); 1143 1144 return ret; 1145 } 1146 1147 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1148 struct ib_wc *wc) 1149 { 1150 struct ib_uverbs_wc tmp; 1151 1152 tmp.wr_id = wc->wr_id; 1153 tmp.status = wc->status; 1154 tmp.opcode = wc->opcode; 1155 tmp.vendor_err = wc->vendor_err; 1156 tmp.byte_len = wc->byte_len; 1157 tmp.ex.imm_data = wc->ex.imm_data; 1158 tmp.qp_num = wc->qp->qp_num; 1159 tmp.src_qp = wc->src_qp; 1160 tmp.wc_flags = wc->wc_flags; 1161 tmp.pkey_index = wc->pkey_index; 1162 if (rdma_cap_opa_ah(ib_dev, wc->port_num)) 1163 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); 1164 else 1165 tmp.slid = ib_lid_cpu16(wc->slid); 1166 tmp.sl = wc->sl; 1167 tmp.dlid_path_bits = wc->dlid_path_bits; 1168 tmp.port_num = wc->port_num; 1169 tmp.reserved = 0; 1170 1171 if (copy_to_user(dest, &tmp, sizeof tmp)) 1172 return -EFAULT; 1173 1174 return 0; 1175 } 1176 1177 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1178 { 1179 struct ib_uverbs_poll_cq cmd; 1180 struct ib_uverbs_poll_cq_resp resp; 1181 u8 __user *header_ptr; 1182 u8 __user *data_ptr; 1183 struct ib_cq *cq; 1184 struct ib_wc wc; 1185 int ret; 1186 1187 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1188 if (ret) 1189 return ret; 1190 1191 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1192 if (!cq) 1193 return -EINVAL; 1194 1195 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1196 header_ptr = attrs->ucore.outbuf; 1197 data_ptr = header_ptr + sizeof resp; 1198 1199 memset(&resp, 0, sizeof resp); 1200 while (resp.count < cmd.ne) { 1201 ret = ib_poll_cq(cq, 1, &wc); 1202 if (ret < 0) 1203 goto out_put; 1204 if (!ret) 1205 break; 1206 1207 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1208 if (ret) 1209 goto out_put; 1210 1211 data_ptr += sizeof(struct ib_uverbs_wc); 1212 ++resp.count; 1213 } 1214 1215 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1216 ret = -EFAULT; 1217 goto out_put; 1218 } 1219 ret = 0; 1220 1221 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1222 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1223 1224 out_put: 1225 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1226 UVERBS_LOOKUP_READ); 1227 return ret; 1228 } 1229 1230 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1231 { 1232 struct ib_uverbs_req_notify_cq cmd; 1233 struct ib_cq *cq; 1234 int ret; 1235 1236 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1237 if (ret) 1238 return ret; 1239 1240 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1241 if (!cq) 1242 return -EINVAL; 1243 1244 ib_req_notify_cq(cq, cmd.solicited_only ? 1245 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1246 1247 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1248 UVERBS_LOOKUP_READ); 1249 return 0; 1250 } 1251 1252 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1253 { 1254 struct ib_uverbs_destroy_cq cmd; 1255 struct ib_uverbs_destroy_cq_resp resp; 1256 struct ib_uobject *uobj; 1257 struct ib_ucq_object *obj; 1258 int ret; 1259 1260 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1261 if (ret) 1262 return ret; 1263 1264 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1265 if (IS_ERR(uobj)) 1266 return PTR_ERR(uobj); 1267 1268 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject); 1269 memset(&resp, 0, sizeof(resp)); 1270 resp.comp_events_reported = obj->comp_events_reported; 1271 resp.async_events_reported = obj->uevent.events_reported; 1272 1273 uobj_put_destroy(uobj); 1274 1275 return uverbs_response(attrs, &resp, sizeof(resp)); 1276 } 1277 1278 static int create_qp(struct uverbs_attr_bundle *attrs, 1279 struct ib_uverbs_ex_create_qp *cmd) 1280 { 1281 struct ib_uqp_object *obj; 1282 struct ib_device *device; 1283 struct ib_pd *pd = NULL; 1284 struct ib_xrcd *xrcd = NULL; 1285 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1286 struct ib_cq *scq = NULL, *rcq = NULL; 1287 struct ib_srq *srq = NULL; 1288 struct ib_qp *qp; 1289 struct ib_qp_init_attr attr = {}; 1290 struct ib_uverbs_ex_create_qp_resp resp = {}; 1291 int ret; 1292 struct ib_rwq_ind_table *ind_tbl = NULL; 1293 bool has_sq = true; 1294 struct ib_device *ib_dev; 1295 1296 switch (cmd->qp_type) { 1297 case IB_QPT_RAW_PACKET: 1298 if (!capable(CAP_NET_RAW)) 1299 return -EPERM; 1300 break; 1301 case IB_QPT_RC: 1302 case IB_QPT_UC: 1303 case IB_QPT_UD: 1304 case IB_QPT_XRC_INI: 1305 case IB_QPT_XRC_TGT: 1306 case IB_QPT_DRIVER: 1307 break; 1308 default: 1309 return -EINVAL; 1310 } 1311 1312 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1313 &ib_dev); 1314 if (IS_ERR(obj)) 1315 return PTR_ERR(obj); 1316 obj->uxrcd = NULL; 1317 obj->uevent.uobject.user_handle = cmd->user_handle; 1318 mutex_init(&obj->mcast_lock); 1319 1320 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1321 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1322 UVERBS_OBJECT_RWQ_IND_TBL, 1323 cmd->rwq_ind_tbl_handle, attrs); 1324 if (!ind_tbl) { 1325 ret = -EINVAL; 1326 goto err_put; 1327 } 1328 1329 attr.rwq_ind_tbl = ind_tbl; 1330 } 1331 1332 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1333 ret = -EINVAL; 1334 goto err_put; 1335 } 1336 1337 if (ind_tbl && !cmd->max_send_wr) 1338 has_sq = false; 1339 1340 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1341 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1342 attrs); 1343 1344 if (IS_ERR(xrcd_uobj)) { 1345 ret = -EINVAL; 1346 goto err_put; 1347 } 1348 1349 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1350 if (!xrcd) { 1351 ret = -EINVAL; 1352 goto err_put; 1353 } 1354 device = xrcd->device; 1355 } else { 1356 if (cmd->qp_type == IB_QPT_XRC_INI) { 1357 cmd->max_recv_wr = 0; 1358 cmd->max_recv_sge = 0; 1359 } else { 1360 if (cmd->is_srq) { 1361 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1362 cmd->srq_handle, attrs); 1363 if (!srq || srq->srq_type == IB_SRQT_XRC) { 1364 ret = -EINVAL; 1365 goto err_put; 1366 } 1367 } 1368 1369 if (!ind_tbl) { 1370 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1371 rcq = uobj_get_obj_read( 1372 cq, UVERBS_OBJECT_CQ, 1373 cmd->recv_cq_handle, attrs); 1374 if (!rcq) { 1375 ret = -EINVAL; 1376 goto err_put; 1377 } 1378 } 1379 } 1380 } 1381 1382 if (has_sq) 1383 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1384 cmd->send_cq_handle, attrs); 1385 if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI) 1386 rcq = rcq ?: scq; 1387 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1388 attrs); 1389 if (!pd || (!scq && has_sq)) { 1390 ret = -EINVAL; 1391 goto err_put; 1392 } 1393 1394 device = pd->device; 1395 } 1396 1397 attr.event_handler = ib_uverbs_qp_event_handler; 1398 attr.send_cq = scq; 1399 attr.recv_cq = rcq; 1400 attr.srq = srq; 1401 attr.xrcd = xrcd; 1402 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1403 IB_SIGNAL_REQ_WR; 1404 attr.qp_type = cmd->qp_type; 1405 attr.create_flags = 0; 1406 1407 attr.cap.max_send_wr = cmd->max_send_wr; 1408 attr.cap.max_recv_wr = cmd->max_recv_wr; 1409 attr.cap.max_send_sge = cmd->max_send_sge; 1410 attr.cap.max_recv_sge = cmd->max_recv_sge; 1411 attr.cap.max_inline_data = cmd->max_inline_data; 1412 1413 INIT_LIST_HEAD(&obj->uevent.event_list); 1414 INIT_LIST_HEAD(&obj->mcast_list); 1415 1416 attr.create_flags = cmd->create_flags; 1417 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1418 IB_QP_CREATE_CROSS_CHANNEL | 1419 IB_QP_CREATE_MANAGED_SEND | 1420 IB_QP_CREATE_MANAGED_RECV | 1421 IB_QP_CREATE_SCATTER_FCS | 1422 IB_QP_CREATE_CVLAN_STRIPPING | 1423 IB_QP_CREATE_SOURCE_QPN | 1424 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1425 ret = -EINVAL; 1426 goto err_put; 1427 } 1428 1429 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1430 if (!capable(CAP_NET_RAW)) { 1431 ret = -EPERM; 1432 goto err_put; 1433 } 1434 1435 attr.source_qpn = cmd->source_qpn; 1436 } 1437 1438 qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj, 1439 KBUILD_MODNAME); 1440 if (IS_ERR(qp)) { 1441 ret = PTR_ERR(qp); 1442 goto err_put; 1443 } 1444 ib_qp_usecnt_inc(qp); 1445 1446 obj->uevent.uobject.object = qp; 1447 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1448 if (obj->uevent.event_file) 1449 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1450 1451 if (xrcd) { 1452 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1453 uobject); 1454 atomic_inc(&obj->uxrcd->refcnt); 1455 uobj_put_read(xrcd_uobj); 1456 } 1457 1458 if (pd) 1459 uobj_put_obj_read(pd); 1460 if (scq) 1461 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1462 UVERBS_LOOKUP_READ); 1463 if (rcq && rcq != scq) 1464 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1465 UVERBS_LOOKUP_READ); 1466 if (srq) 1467 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1468 UVERBS_LOOKUP_READ); 1469 if (ind_tbl) 1470 uobj_put_obj_read(ind_tbl); 1471 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1472 1473 resp.base.qpn = qp->qp_num; 1474 resp.base.qp_handle = obj->uevent.uobject.id; 1475 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1476 resp.base.max_send_sge = attr.cap.max_send_sge; 1477 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1478 resp.base.max_send_wr = attr.cap.max_send_wr; 1479 resp.base.max_inline_data = attr.cap.max_inline_data; 1480 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1481 return uverbs_response(attrs, &resp, sizeof(resp)); 1482 1483 err_put: 1484 if (!IS_ERR(xrcd_uobj)) 1485 uobj_put_read(xrcd_uobj); 1486 if (pd) 1487 uobj_put_obj_read(pd); 1488 if (scq) 1489 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1490 UVERBS_LOOKUP_READ); 1491 if (rcq && rcq != scq) 1492 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1493 UVERBS_LOOKUP_READ); 1494 if (srq) 1495 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1496 UVERBS_LOOKUP_READ); 1497 if (ind_tbl) 1498 uobj_put_obj_read(ind_tbl); 1499 1500 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1501 return ret; 1502 } 1503 1504 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1505 { 1506 struct ib_uverbs_create_qp cmd; 1507 struct ib_uverbs_ex_create_qp cmd_ex; 1508 int ret; 1509 1510 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1511 if (ret) 1512 return ret; 1513 1514 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1515 cmd_ex.user_handle = cmd.user_handle; 1516 cmd_ex.pd_handle = cmd.pd_handle; 1517 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1518 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1519 cmd_ex.srq_handle = cmd.srq_handle; 1520 cmd_ex.max_send_wr = cmd.max_send_wr; 1521 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1522 cmd_ex.max_send_sge = cmd.max_send_sge; 1523 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1524 cmd_ex.max_inline_data = cmd.max_inline_data; 1525 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1526 cmd_ex.qp_type = cmd.qp_type; 1527 cmd_ex.is_srq = cmd.is_srq; 1528 1529 return create_qp(attrs, &cmd_ex); 1530 } 1531 1532 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1533 { 1534 struct ib_uverbs_ex_create_qp cmd; 1535 int ret; 1536 1537 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1538 if (ret) 1539 return ret; 1540 1541 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1542 return -EINVAL; 1543 1544 if (cmd.reserved) 1545 return -EINVAL; 1546 1547 return create_qp(attrs, &cmd); 1548 } 1549 1550 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1551 { 1552 struct ib_uverbs_create_qp_resp resp = {}; 1553 struct ib_uverbs_open_qp cmd; 1554 struct ib_uqp_object *obj; 1555 struct ib_xrcd *xrcd; 1556 struct ib_qp *qp; 1557 struct ib_qp_open_attr attr = {}; 1558 int ret; 1559 struct ib_uobject *xrcd_uobj; 1560 struct ib_device *ib_dev; 1561 1562 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1563 if (ret) 1564 return ret; 1565 1566 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1567 &ib_dev); 1568 if (IS_ERR(obj)) 1569 return PTR_ERR(obj); 1570 1571 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1572 if (IS_ERR(xrcd_uobj)) { 1573 ret = -EINVAL; 1574 goto err_put; 1575 } 1576 1577 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1578 if (!xrcd) { 1579 ret = -EINVAL; 1580 goto err_xrcd; 1581 } 1582 1583 attr.event_handler = ib_uverbs_qp_event_handler; 1584 attr.qp_num = cmd.qpn; 1585 attr.qp_type = cmd.qp_type; 1586 1587 INIT_LIST_HEAD(&obj->uevent.event_list); 1588 INIT_LIST_HEAD(&obj->mcast_list); 1589 1590 qp = ib_open_qp(xrcd, &attr); 1591 if (IS_ERR(qp)) { 1592 ret = PTR_ERR(qp); 1593 goto err_xrcd; 1594 } 1595 1596 obj->uevent.uobject.object = qp; 1597 obj->uevent.uobject.user_handle = cmd.user_handle; 1598 1599 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1600 atomic_inc(&obj->uxrcd->refcnt); 1601 qp->uobject = obj; 1602 uobj_put_read(xrcd_uobj); 1603 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1604 1605 resp.qpn = qp->qp_num; 1606 resp.qp_handle = obj->uevent.uobject.id; 1607 return uverbs_response(attrs, &resp, sizeof(resp)); 1608 1609 err_xrcd: 1610 uobj_put_read(xrcd_uobj); 1611 err_put: 1612 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1613 return ret; 1614 } 1615 1616 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, 1617 struct rdma_ah_attr *rdma_attr) 1618 { 1619 const struct ib_global_route *grh; 1620 1621 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr); 1622 uverb_attr->sl = rdma_ah_get_sl(rdma_attr); 1623 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr); 1624 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr); 1625 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) & 1626 IB_AH_GRH); 1627 if (uverb_attr->is_global) { 1628 grh = rdma_ah_read_grh(rdma_attr); 1629 memcpy(uverb_attr->dgid, grh->dgid.raw, 16); 1630 uverb_attr->flow_label = grh->flow_label; 1631 uverb_attr->sgid_index = grh->sgid_index; 1632 uverb_attr->hop_limit = grh->hop_limit; 1633 uverb_attr->traffic_class = grh->traffic_class; 1634 } 1635 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr); 1636 } 1637 1638 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) 1639 { 1640 struct ib_uverbs_query_qp cmd; 1641 struct ib_uverbs_query_qp_resp resp; 1642 struct ib_qp *qp; 1643 struct ib_qp_attr *attr; 1644 struct ib_qp_init_attr *init_attr; 1645 int ret; 1646 1647 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1648 if (ret) 1649 return ret; 1650 1651 attr = kmalloc(sizeof *attr, GFP_KERNEL); 1652 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 1653 if (!attr || !init_attr) { 1654 ret = -ENOMEM; 1655 goto out; 1656 } 1657 1658 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1659 if (!qp) { 1660 ret = -EINVAL; 1661 goto out; 1662 } 1663 1664 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1665 1666 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1667 UVERBS_LOOKUP_READ); 1668 1669 if (ret) 1670 goto out; 1671 1672 memset(&resp, 0, sizeof resp); 1673 1674 resp.qp_state = attr->qp_state; 1675 resp.cur_qp_state = attr->cur_qp_state; 1676 resp.path_mtu = attr->path_mtu; 1677 resp.path_mig_state = attr->path_mig_state; 1678 resp.qkey = attr->qkey; 1679 resp.rq_psn = attr->rq_psn; 1680 resp.sq_psn = attr->sq_psn; 1681 resp.dest_qp_num = attr->dest_qp_num; 1682 resp.qp_access_flags = attr->qp_access_flags; 1683 resp.pkey_index = attr->pkey_index; 1684 resp.alt_pkey_index = attr->alt_pkey_index; 1685 resp.sq_draining = attr->sq_draining; 1686 resp.max_rd_atomic = attr->max_rd_atomic; 1687 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1688 resp.min_rnr_timer = attr->min_rnr_timer; 1689 resp.port_num = attr->port_num; 1690 resp.timeout = attr->timeout; 1691 resp.retry_cnt = attr->retry_cnt; 1692 resp.rnr_retry = attr->rnr_retry; 1693 resp.alt_port_num = attr->alt_port_num; 1694 resp.alt_timeout = attr->alt_timeout; 1695 1696 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1697 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1698 1699 resp.max_send_wr = init_attr->cap.max_send_wr; 1700 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1701 resp.max_send_sge = init_attr->cap.max_send_sge; 1702 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1703 resp.max_inline_data = init_attr->cap.max_inline_data; 1704 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1705 1706 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1707 1708 out: 1709 kfree(attr); 1710 kfree(init_attr); 1711 1712 return ret; 1713 } 1714 1715 /* Remove ignored fields set in the attribute mask */ 1716 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1717 { 1718 switch (qp_type) { 1719 case IB_QPT_XRC_INI: 1720 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1721 case IB_QPT_XRC_TGT: 1722 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1723 IB_QP_RNR_RETRY); 1724 default: 1725 return mask; 1726 } 1727 } 1728 1729 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1730 struct rdma_ah_attr *rdma_attr, 1731 struct ib_uverbs_qp_dest *uverb_attr) 1732 { 1733 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); 1734 if (uverb_attr->is_global) { 1735 rdma_ah_set_grh(rdma_attr, NULL, 1736 uverb_attr->flow_label, 1737 uverb_attr->sgid_index, 1738 uverb_attr->hop_limit, 1739 uverb_attr->traffic_class); 1740 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); 1741 } else { 1742 rdma_ah_set_ah_flags(rdma_attr, 0); 1743 } 1744 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); 1745 rdma_ah_set_sl(rdma_attr, uverb_attr->sl); 1746 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); 1747 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); 1748 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); 1749 rdma_ah_set_make_grd(rdma_attr, false); 1750 } 1751 1752 static int modify_qp(struct uverbs_attr_bundle *attrs, 1753 struct ib_uverbs_ex_modify_qp *cmd) 1754 { 1755 struct ib_qp_attr *attr; 1756 struct ib_qp *qp; 1757 int ret; 1758 1759 attr = kzalloc(sizeof(*attr), GFP_KERNEL); 1760 if (!attr) 1761 return -ENOMEM; 1762 1763 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1764 attrs); 1765 if (!qp) { 1766 ret = -EINVAL; 1767 goto out; 1768 } 1769 1770 if ((cmd->base.attr_mask & IB_QP_PORT) && 1771 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1772 ret = -EINVAL; 1773 goto release_qp; 1774 } 1775 1776 if ((cmd->base.attr_mask & IB_QP_AV)) { 1777 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1778 ret = -EINVAL; 1779 goto release_qp; 1780 } 1781 1782 if (cmd->base.attr_mask & IB_QP_STATE && 1783 cmd->base.qp_state == IB_QPS_RTR) { 1784 /* We are in INIT->RTR TRANSITION (if we are not, 1785 * this transition will be rejected in subsequent checks). 1786 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1787 * but the IB_QP_STATE flag is required. 1788 * 1789 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1790 * when IB_QP_AV is set, has required inclusion of a valid 1791 * port number in the primary AV. (AVs are created and handled 1792 * differently for infiniband and ethernet (RoCE) ports). 1793 * 1794 * Check the port number included in the primary AV against 1795 * the port number in the qp struct, which was set (and saved) 1796 * in the RST->INIT transition. 1797 */ 1798 if (cmd->base.dest.port_num != qp->real_qp->port) { 1799 ret = -EINVAL; 1800 goto release_qp; 1801 } 1802 } else { 1803 /* We are in SQD->SQD. (If we are not, this transition will 1804 * be rejected later in the verbs layer checks). 1805 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1806 * together in the SQD->SQD transition. 1807 * 1808 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1809 * verbs layer driver does not track primary port changes 1810 * resulting from path migration. Thus, in SQD, if the primary 1811 * AV is modified, the primary port should also be modified). 1812 * 1813 * Note that in this transition, the IB_QP_STATE flag 1814 * is not allowed. 1815 */ 1816 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1817 == (IB_QP_AV | IB_QP_PORT)) && 1818 cmd->base.port_num != cmd->base.dest.port_num) { 1819 ret = -EINVAL; 1820 goto release_qp; 1821 } 1822 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1823 == IB_QP_AV) { 1824 cmd->base.attr_mask |= IB_QP_PORT; 1825 cmd->base.port_num = cmd->base.dest.port_num; 1826 } 1827 } 1828 } 1829 1830 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1831 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1832 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1833 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1834 ret = -EINVAL; 1835 goto release_qp; 1836 } 1837 1838 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1839 cmd->base.cur_qp_state > IB_QPS_ERR) || 1840 (cmd->base.attr_mask & IB_QP_STATE && 1841 cmd->base.qp_state > IB_QPS_ERR)) { 1842 ret = -EINVAL; 1843 goto release_qp; 1844 } 1845 1846 if (cmd->base.attr_mask & IB_QP_STATE) 1847 attr->qp_state = cmd->base.qp_state; 1848 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1849 attr->cur_qp_state = cmd->base.cur_qp_state; 1850 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1851 attr->path_mtu = cmd->base.path_mtu; 1852 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1853 attr->path_mig_state = cmd->base.path_mig_state; 1854 if (cmd->base.attr_mask & IB_QP_QKEY) 1855 attr->qkey = cmd->base.qkey; 1856 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1857 attr->rq_psn = cmd->base.rq_psn; 1858 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1859 attr->sq_psn = cmd->base.sq_psn; 1860 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1861 attr->dest_qp_num = cmd->base.dest_qp_num; 1862 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1863 attr->qp_access_flags = cmd->base.qp_access_flags; 1864 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1865 attr->pkey_index = cmd->base.pkey_index; 1866 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1867 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1868 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1869 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1870 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1871 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1872 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1873 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1874 if (cmd->base.attr_mask & IB_QP_PORT) 1875 attr->port_num = cmd->base.port_num; 1876 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1877 attr->timeout = cmd->base.timeout; 1878 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1879 attr->retry_cnt = cmd->base.retry_cnt; 1880 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1881 attr->rnr_retry = cmd->base.rnr_retry; 1882 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1883 attr->alt_port_num = cmd->base.alt_port_num; 1884 attr->alt_timeout = cmd->base.alt_timeout; 1885 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1886 } 1887 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1888 attr->rate_limit = cmd->rate_limit; 1889 1890 if (cmd->base.attr_mask & IB_QP_AV) 1891 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1892 &cmd->base.dest); 1893 1894 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1895 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1896 &cmd->base.alt_dest); 1897 1898 ret = ib_modify_qp_with_udata(qp, attr, 1899 modify_qp_mask(qp->qp_type, 1900 cmd->base.attr_mask), 1901 &attrs->driver_udata); 1902 1903 release_qp: 1904 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1905 UVERBS_LOOKUP_READ); 1906 out: 1907 kfree(attr); 1908 1909 return ret; 1910 } 1911 1912 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1913 { 1914 struct ib_uverbs_ex_modify_qp cmd; 1915 int ret; 1916 1917 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1918 if (ret) 1919 return ret; 1920 1921 if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 1922 return -EOPNOTSUPP; 1923 1924 return modify_qp(attrs, &cmd); 1925 } 1926 1927 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1928 { 1929 struct ib_uverbs_ex_modify_qp cmd; 1930 struct ib_uverbs_ex_modify_qp_resp resp = { 1931 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1932 }; 1933 int ret; 1934 1935 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1936 if (ret) 1937 return ret; 1938 1939 /* 1940 * Last bit is reserved for extending the attr_mask by 1941 * using another field. 1942 */ 1943 if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT)) 1944 return -EOPNOTSUPP; 1945 1946 ret = modify_qp(attrs, &cmd); 1947 if (ret) 1948 return ret; 1949 1950 return uverbs_response(attrs, &resp, sizeof(resp)); 1951 } 1952 1953 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1954 { 1955 struct ib_uverbs_destroy_qp cmd; 1956 struct ib_uverbs_destroy_qp_resp resp; 1957 struct ib_uobject *uobj; 1958 struct ib_uqp_object *obj; 1959 int ret; 1960 1961 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1962 if (ret) 1963 return ret; 1964 1965 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1966 if (IS_ERR(uobj)) 1967 return PTR_ERR(uobj); 1968 1969 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1970 memset(&resp, 0, sizeof(resp)); 1971 resp.events_reported = obj->uevent.events_reported; 1972 1973 uobj_put_destroy(uobj); 1974 1975 return uverbs_response(attrs, &resp, sizeof(resp)); 1976 } 1977 1978 static void *alloc_wr(size_t wr_size, __u32 num_sge) 1979 { 1980 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) / 1981 sizeof(struct ib_sge)) 1982 return NULL; 1983 1984 return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) + 1985 num_sge * sizeof(struct ib_sge), 1986 GFP_KERNEL); 1987 } 1988 1989 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 1990 { 1991 struct ib_uverbs_post_send cmd; 1992 struct ib_uverbs_post_send_resp resp; 1993 struct ib_uverbs_send_wr *user_wr; 1994 struct ib_send_wr *wr = NULL, *last, *next; 1995 const struct ib_send_wr *bad_wr; 1996 struct ib_qp *qp; 1997 int i, sg_ind; 1998 int is_ud; 1999 int ret, ret2; 2000 size_t next_size; 2001 const struct ib_sge __user *sgls; 2002 const void __user *wqes; 2003 struct uverbs_req_iter iter; 2004 2005 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2006 if (ret) 2007 return ret; 2008 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count); 2009 if (IS_ERR(wqes)) 2010 return PTR_ERR(wqes); 2011 sgls = uverbs_request_next_ptr( 2012 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge)); 2013 if (IS_ERR(sgls)) 2014 return PTR_ERR(sgls); 2015 ret = uverbs_request_finish(&iter); 2016 if (ret) 2017 return ret; 2018 2019 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2020 if (!user_wr) 2021 return -ENOMEM; 2022 2023 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2024 if (!qp) { 2025 ret = -EINVAL; 2026 goto out; 2027 } 2028 2029 is_ud = qp->qp_type == IB_QPT_UD; 2030 sg_ind = 0; 2031 last = NULL; 2032 for (i = 0; i < cmd.wr_count; ++i) { 2033 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2034 cmd.wqe_size)) { 2035 ret = -EFAULT; 2036 goto out_put; 2037 } 2038 2039 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2040 ret = -EINVAL; 2041 goto out_put; 2042 } 2043 2044 if (is_ud) { 2045 struct ib_ud_wr *ud; 2046 2047 if (user_wr->opcode != IB_WR_SEND && 2048 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2049 ret = -EINVAL; 2050 goto out_put; 2051 } 2052 2053 next_size = sizeof(*ud); 2054 ud = alloc_wr(next_size, user_wr->num_sge); 2055 if (!ud) { 2056 ret = -ENOMEM; 2057 goto out_put; 2058 } 2059 2060 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2061 user_wr->wr.ud.ah, attrs); 2062 if (!ud->ah) { 2063 kfree(ud); 2064 ret = -EINVAL; 2065 goto out_put; 2066 } 2067 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2068 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2069 2070 next = &ud->wr; 2071 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2072 user_wr->opcode == IB_WR_RDMA_WRITE || 2073 user_wr->opcode == IB_WR_RDMA_READ) { 2074 struct ib_rdma_wr *rdma; 2075 2076 next_size = sizeof(*rdma); 2077 rdma = alloc_wr(next_size, user_wr->num_sge); 2078 if (!rdma) { 2079 ret = -ENOMEM; 2080 goto out_put; 2081 } 2082 2083 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2084 rdma->rkey = user_wr->wr.rdma.rkey; 2085 2086 next = &rdma->wr; 2087 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2088 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2089 struct ib_atomic_wr *atomic; 2090 2091 next_size = sizeof(*atomic); 2092 atomic = alloc_wr(next_size, user_wr->num_sge); 2093 if (!atomic) { 2094 ret = -ENOMEM; 2095 goto out_put; 2096 } 2097 2098 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2099 atomic->compare_add = user_wr->wr.atomic.compare_add; 2100 atomic->swap = user_wr->wr.atomic.swap; 2101 atomic->rkey = user_wr->wr.atomic.rkey; 2102 2103 next = &atomic->wr; 2104 } else if (user_wr->opcode == IB_WR_SEND || 2105 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2106 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2107 next_size = sizeof(*next); 2108 next = alloc_wr(next_size, user_wr->num_sge); 2109 if (!next) { 2110 ret = -ENOMEM; 2111 goto out_put; 2112 } 2113 } else { 2114 ret = -EINVAL; 2115 goto out_put; 2116 } 2117 2118 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2119 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2120 next->ex.imm_data = 2121 (__be32 __force) user_wr->ex.imm_data; 2122 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2123 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2124 } 2125 2126 if (!last) 2127 wr = next; 2128 else 2129 last->next = next; 2130 last = next; 2131 2132 next->next = NULL; 2133 next->wr_id = user_wr->wr_id; 2134 next->num_sge = user_wr->num_sge; 2135 next->opcode = user_wr->opcode; 2136 next->send_flags = user_wr->send_flags; 2137 2138 if (next->num_sge) { 2139 next->sg_list = (void *) next + 2140 ALIGN(next_size, sizeof(struct ib_sge)); 2141 if (copy_from_user(next->sg_list, sgls + sg_ind, 2142 next->num_sge * 2143 sizeof(struct ib_sge))) { 2144 ret = -EFAULT; 2145 goto out_put; 2146 } 2147 sg_ind += next->num_sge; 2148 } else 2149 next->sg_list = NULL; 2150 } 2151 2152 resp.bad_wr = 0; 2153 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2154 if (ret) 2155 for (next = wr; next; next = next->next) { 2156 ++resp.bad_wr; 2157 if (next == bad_wr) 2158 break; 2159 } 2160 2161 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2162 if (ret2) 2163 ret = ret2; 2164 2165 out_put: 2166 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2167 UVERBS_LOOKUP_READ); 2168 2169 while (wr) { 2170 if (is_ud && ud_wr(wr)->ah) 2171 uobj_put_obj_read(ud_wr(wr)->ah); 2172 next = wr->next; 2173 kfree(wr); 2174 wr = next; 2175 } 2176 2177 out: 2178 kfree(user_wr); 2179 2180 return ret; 2181 } 2182 2183 static struct ib_recv_wr * 2184 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2185 u32 wqe_size, u32 sge_count) 2186 { 2187 struct ib_uverbs_recv_wr *user_wr; 2188 struct ib_recv_wr *wr = NULL, *last, *next; 2189 int sg_ind; 2190 int i; 2191 int ret; 2192 const struct ib_sge __user *sgls; 2193 const void __user *wqes; 2194 2195 if (wqe_size < sizeof(struct ib_uverbs_recv_wr)) 2196 return ERR_PTR(-EINVAL); 2197 2198 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count); 2199 if (IS_ERR(wqes)) 2200 return ERR_CAST(wqes); 2201 sgls = uverbs_request_next_ptr( 2202 iter, sge_count * sizeof(struct ib_uverbs_sge)); 2203 if (IS_ERR(sgls)) 2204 return ERR_CAST(sgls); 2205 ret = uverbs_request_finish(iter); 2206 if (ret) 2207 return ERR_PTR(ret); 2208 2209 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2210 if (!user_wr) 2211 return ERR_PTR(-ENOMEM); 2212 2213 sg_ind = 0; 2214 last = NULL; 2215 for (i = 0; i < wr_count; ++i) { 2216 if (copy_from_user(user_wr, wqes + i * wqe_size, 2217 wqe_size)) { 2218 ret = -EFAULT; 2219 goto err; 2220 } 2221 2222 if (user_wr->num_sge + sg_ind > sge_count) { 2223 ret = -EINVAL; 2224 goto err; 2225 } 2226 2227 if (user_wr->num_sge >= 2228 (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) / 2229 sizeof(struct ib_sge)) { 2230 ret = -EINVAL; 2231 goto err; 2232 } 2233 2234 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) + 2235 user_wr->num_sge * sizeof(struct ib_sge), 2236 GFP_KERNEL); 2237 if (!next) { 2238 ret = -ENOMEM; 2239 goto err; 2240 } 2241 2242 if (!last) 2243 wr = next; 2244 else 2245 last->next = next; 2246 last = next; 2247 2248 next->next = NULL; 2249 next->wr_id = user_wr->wr_id; 2250 next->num_sge = user_wr->num_sge; 2251 2252 if (next->num_sge) { 2253 next->sg_list = (void *)next + 2254 ALIGN(sizeof(*next), sizeof(struct ib_sge)); 2255 if (copy_from_user(next->sg_list, sgls + sg_ind, 2256 next->num_sge * 2257 sizeof(struct ib_sge))) { 2258 ret = -EFAULT; 2259 goto err; 2260 } 2261 sg_ind += next->num_sge; 2262 } else 2263 next->sg_list = NULL; 2264 } 2265 2266 kfree(user_wr); 2267 return wr; 2268 2269 err: 2270 kfree(user_wr); 2271 2272 while (wr) { 2273 next = wr->next; 2274 kfree(wr); 2275 wr = next; 2276 } 2277 2278 return ERR_PTR(ret); 2279 } 2280 2281 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2282 { 2283 struct ib_uverbs_post_recv cmd; 2284 struct ib_uverbs_post_recv_resp resp; 2285 struct ib_recv_wr *wr, *next; 2286 const struct ib_recv_wr *bad_wr; 2287 struct ib_qp *qp; 2288 int ret, ret2; 2289 struct uverbs_req_iter iter; 2290 2291 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2292 if (ret) 2293 return ret; 2294 2295 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2296 cmd.sge_count); 2297 if (IS_ERR(wr)) 2298 return PTR_ERR(wr); 2299 2300 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2301 if (!qp) { 2302 ret = -EINVAL; 2303 goto out; 2304 } 2305 2306 resp.bad_wr = 0; 2307 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2308 2309 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2310 UVERBS_LOOKUP_READ); 2311 if (ret) { 2312 for (next = wr; next; next = next->next) { 2313 ++resp.bad_wr; 2314 if (next == bad_wr) 2315 break; 2316 } 2317 } 2318 2319 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2320 if (ret2) 2321 ret = ret2; 2322 out: 2323 while (wr) { 2324 next = wr->next; 2325 kfree(wr); 2326 wr = next; 2327 } 2328 2329 return ret; 2330 } 2331 2332 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2333 { 2334 struct ib_uverbs_post_srq_recv cmd; 2335 struct ib_uverbs_post_srq_recv_resp resp; 2336 struct ib_recv_wr *wr, *next; 2337 const struct ib_recv_wr *bad_wr; 2338 struct ib_srq *srq; 2339 int ret, ret2; 2340 struct uverbs_req_iter iter; 2341 2342 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2343 if (ret) 2344 return ret; 2345 2346 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2347 cmd.sge_count); 2348 if (IS_ERR(wr)) 2349 return PTR_ERR(wr); 2350 2351 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2352 if (!srq) { 2353 ret = -EINVAL; 2354 goto out; 2355 } 2356 2357 resp.bad_wr = 0; 2358 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2359 2360 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 2361 UVERBS_LOOKUP_READ); 2362 2363 if (ret) 2364 for (next = wr; next; next = next->next) { 2365 ++resp.bad_wr; 2366 if (next == bad_wr) 2367 break; 2368 } 2369 2370 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2371 if (ret2) 2372 ret = ret2; 2373 2374 out: 2375 while (wr) { 2376 next = wr->next; 2377 kfree(wr); 2378 wr = next; 2379 } 2380 2381 return ret; 2382 } 2383 2384 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2385 { 2386 struct ib_uverbs_create_ah cmd; 2387 struct ib_uverbs_create_ah_resp resp; 2388 struct ib_uobject *uobj; 2389 struct ib_pd *pd; 2390 struct ib_ah *ah; 2391 struct rdma_ah_attr attr = {}; 2392 int ret; 2393 struct ib_device *ib_dev; 2394 2395 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2396 if (ret) 2397 return ret; 2398 2399 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2400 if (IS_ERR(uobj)) 2401 return PTR_ERR(uobj); 2402 2403 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2404 ret = -EINVAL; 2405 goto err; 2406 } 2407 2408 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2409 if (!pd) { 2410 ret = -EINVAL; 2411 goto err; 2412 } 2413 2414 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2415 rdma_ah_set_make_grd(&attr, false); 2416 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2417 rdma_ah_set_sl(&attr, cmd.attr.sl); 2418 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2419 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2420 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2421 2422 if (cmd.attr.is_global) { 2423 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2424 cmd.attr.grh.sgid_index, 2425 cmd.attr.grh.hop_limit, 2426 cmd.attr.grh.traffic_class); 2427 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2428 } else { 2429 rdma_ah_set_ah_flags(&attr, 0); 2430 } 2431 2432 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2433 if (IS_ERR(ah)) { 2434 ret = PTR_ERR(ah); 2435 goto err_put; 2436 } 2437 2438 ah->uobject = uobj; 2439 uobj->user_handle = cmd.user_handle; 2440 uobj->object = ah; 2441 uobj_put_obj_read(pd); 2442 uobj_finalize_uobj_create(uobj, attrs); 2443 2444 resp.ah_handle = uobj->id; 2445 return uverbs_response(attrs, &resp, sizeof(resp)); 2446 2447 err_put: 2448 uobj_put_obj_read(pd); 2449 err: 2450 uobj_alloc_abort(uobj, attrs); 2451 return ret; 2452 } 2453 2454 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2455 { 2456 struct ib_uverbs_destroy_ah cmd; 2457 int ret; 2458 2459 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2460 if (ret) 2461 return ret; 2462 2463 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2464 } 2465 2466 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2467 { 2468 struct ib_uverbs_attach_mcast cmd; 2469 struct ib_qp *qp; 2470 struct ib_uqp_object *obj; 2471 struct ib_uverbs_mcast_entry *mcast; 2472 int ret; 2473 2474 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2475 if (ret) 2476 return ret; 2477 2478 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2479 if (!qp) 2480 return -EINVAL; 2481 2482 obj = qp->uobject; 2483 2484 mutex_lock(&obj->mcast_lock); 2485 list_for_each_entry(mcast, &obj->mcast_list, list) 2486 if (cmd.mlid == mcast->lid && 2487 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2488 ret = 0; 2489 goto out_put; 2490 } 2491 2492 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2493 if (!mcast) { 2494 ret = -ENOMEM; 2495 goto out_put; 2496 } 2497 2498 mcast->lid = cmd.mlid; 2499 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2500 2501 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2502 if (!ret) 2503 list_add_tail(&mcast->list, &obj->mcast_list); 2504 else 2505 kfree(mcast); 2506 2507 out_put: 2508 mutex_unlock(&obj->mcast_lock); 2509 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2510 UVERBS_LOOKUP_READ); 2511 2512 return ret; 2513 } 2514 2515 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2516 { 2517 struct ib_uverbs_detach_mcast cmd; 2518 struct ib_uqp_object *obj; 2519 struct ib_qp *qp; 2520 struct ib_uverbs_mcast_entry *mcast; 2521 int ret; 2522 bool found = false; 2523 2524 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2525 if (ret) 2526 return ret; 2527 2528 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2529 if (!qp) 2530 return -EINVAL; 2531 2532 obj = qp->uobject; 2533 mutex_lock(&obj->mcast_lock); 2534 2535 list_for_each_entry(mcast, &obj->mcast_list, list) 2536 if (cmd.mlid == mcast->lid && 2537 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2538 list_del(&mcast->list); 2539 kfree(mcast); 2540 found = true; 2541 break; 2542 } 2543 2544 if (!found) { 2545 ret = -EINVAL; 2546 goto out_put; 2547 } 2548 2549 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2550 2551 out_put: 2552 mutex_unlock(&obj->mcast_lock); 2553 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2554 UVERBS_LOOKUP_READ); 2555 return ret; 2556 } 2557 2558 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2559 { 2560 struct ib_uflow_resources *resources; 2561 2562 resources = kzalloc(sizeof(*resources), GFP_KERNEL); 2563 2564 if (!resources) 2565 return NULL; 2566 2567 if (!num_specs) 2568 goto out; 2569 2570 resources->counters = 2571 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); 2572 resources->collection = 2573 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); 2574 2575 if (!resources->counters || !resources->collection) 2576 goto err; 2577 2578 out: 2579 resources->max = num_specs; 2580 return resources; 2581 2582 err: 2583 kfree(resources->counters); 2584 kfree(resources); 2585 2586 return NULL; 2587 } 2588 EXPORT_SYMBOL(flow_resources_alloc); 2589 2590 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2591 { 2592 unsigned int i; 2593 2594 if (!uflow_res) 2595 return; 2596 2597 for (i = 0; i < uflow_res->collection_num; i++) 2598 atomic_dec(&uflow_res->collection[i]->usecnt); 2599 2600 for (i = 0; i < uflow_res->counters_num; i++) 2601 atomic_dec(&uflow_res->counters[i]->usecnt); 2602 2603 kfree(uflow_res->collection); 2604 kfree(uflow_res->counters); 2605 kfree(uflow_res); 2606 } 2607 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2608 2609 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2610 enum ib_flow_spec_type type, 2611 void *ibobj) 2612 { 2613 WARN_ON(uflow_res->num >= uflow_res->max); 2614 2615 switch (type) { 2616 case IB_FLOW_SPEC_ACTION_HANDLE: 2617 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2618 uflow_res->collection[uflow_res->collection_num++] = 2619 (struct ib_flow_action *)ibobj; 2620 break; 2621 case IB_FLOW_SPEC_ACTION_COUNT: 2622 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2623 uflow_res->counters[uflow_res->counters_num++] = 2624 (struct ib_counters *)ibobj; 2625 break; 2626 default: 2627 WARN_ON(1); 2628 } 2629 2630 uflow_res->num++; 2631 } 2632 EXPORT_SYMBOL(flow_resources_add); 2633 2634 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2635 struct ib_uverbs_flow_spec *kern_spec, 2636 union ib_flow_spec *ib_spec, 2637 struct ib_uflow_resources *uflow_res) 2638 { 2639 ib_spec->type = kern_spec->type; 2640 switch (ib_spec->type) { 2641 case IB_FLOW_SPEC_ACTION_TAG: 2642 if (kern_spec->flow_tag.size != 2643 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2644 return -EINVAL; 2645 2646 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2647 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2648 break; 2649 case IB_FLOW_SPEC_ACTION_DROP: 2650 if (kern_spec->drop.size != 2651 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2652 return -EINVAL; 2653 2654 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2655 break; 2656 case IB_FLOW_SPEC_ACTION_HANDLE: 2657 if (kern_spec->action.size != 2658 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2659 return -EOPNOTSUPP; 2660 ib_spec->action.act = uobj_get_obj_read(flow_action, 2661 UVERBS_OBJECT_FLOW_ACTION, 2662 kern_spec->action.handle, 2663 attrs); 2664 if (!ib_spec->action.act) 2665 return -EINVAL; 2666 ib_spec->action.size = 2667 sizeof(struct ib_flow_spec_action_handle); 2668 flow_resources_add(uflow_res, 2669 IB_FLOW_SPEC_ACTION_HANDLE, 2670 ib_spec->action.act); 2671 uobj_put_obj_read(ib_spec->action.act); 2672 break; 2673 case IB_FLOW_SPEC_ACTION_COUNT: 2674 if (kern_spec->flow_count.size != 2675 sizeof(struct ib_uverbs_flow_spec_action_count)) 2676 return -EINVAL; 2677 ib_spec->flow_count.counters = 2678 uobj_get_obj_read(counters, 2679 UVERBS_OBJECT_COUNTERS, 2680 kern_spec->flow_count.handle, 2681 attrs); 2682 if (!ib_spec->flow_count.counters) 2683 return -EINVAL; 2684 ib_spec->flow_count.size = 2685 sizeof(struct ib_flow_spec_action_count); 2686 flow_resources_add(uflow_res, 2687 IB_FLOW_SPEC_ACTION_COUNT, 2688 ib_spec->flow_count.counters); 2689 uobj_put_obj_read(ib_spec->flow_count.counters); 2690 break; 2691 default: 2692 return -EINVAL; 2693 } 2694 return 0; 2695 } 2696 2697 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2698 u16 ib_real_filter_sz) 2699 { 2700 /* 2701 * User space filter structures must be 64 bit aligned, otherwise this 2702 * may pass, but we won't handle additional new attributes. 2703 */ 2704 2705 if (kern_filter_size > ib_real_filter_sz) { 2706 if (memchr_inv(kern_spec_filter + 2707 ib_real_filter_sz, 0, 2708 kern_filter_size - ib_real_filter_sz)) 2709 return -EINVAL; 2710 return ib_real_filter_sz; 2711 } 2712 return kern_filter_size; 2713 } 2714 2715 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2716 const void *kern_spec_mask, 2717 const void *kern_spec_val, 2718 size_t kern_filter_sz, 2719 union ib_flow_spec *ib_spec) 2720 { 2721 ssize_t actual_filter_sz; 2722 ssize_t ib_filter_sz; 2723 2724 /* User flow spec size must be aligned to 4 bytes */ 2725 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2726 return -EINVAL; 2727 2728 ib_spec->type = type; 2729 2730 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2731 return -EINVAL; 2732 2733 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2734 case IB_FLOW_SPEC_ETH: 2735 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz); 2736 actual_filter_sz = spec_filter_size(kern_spec_mask, 2737 kern_filter_sz, 2738 ib_filter_sz); 2739 if (actual_filter_sz <= 0) 2740 return -EINVAL; 2741 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2742 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2743 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2744 break; 2745 case IB_FLOW_SPEC_IPV4: 2746 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz); 2747 actual_filter_sz = spec_filter_size(kern_spec_mask, 2748 kern_filter_sz, 2749 ib_filter_sz); 2750 if (actual_filter_sz <= 0) 2751 return -EINVAL; 2752 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2753 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2754 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2755 break; 2756 case IB_FLOW_SPEC_IPV6: 2757 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz); 2758 actual_filter_sz = spec_filter_size(kern_spec_mask, 2759 kern_filter_sz, 2760 ib_filter_sz); 2761 if (actual_filter_sz <= 0) 2762 return -EINVAL; 2763 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2764 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2765 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2766 2767 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2768 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2769 return -EINVAL; 2770 break; 2771 case IB_FLOW_SPEC_TCP: 2772 case IB_FLOW_SPEC_UDP: 2773 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz); 2774 actual_filter_sz = spec_filter_size(kern_spec_mask, 2775 kern_filter_sz, 2776 ib_filter_sz); 2777 if (actual_filter_sz <= 0) 2778 return -EINVAL; 2779 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2780 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2781 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2782 break; 2783 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2784 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz); 2785 actual_filter_sz = spec_filter_size(kern_spec_mask, 2786 kern_filter_sz, 2787 ib_filter_sz); 2788 if (actual_filter_sz <= 0) 2789 return -EINVAL; 2790 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2791 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2792 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2793 2794 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2795 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2796 return -EINVAL; 2797 break; 2798 case IB_FLOW_SPEC_ESP: 2799 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz); 2800 actual_filter_sz = spec_filter_size(kern_spec_mask, 2801 kern_filter_sz, 2802 ib_filter_sz); 2803 if (actual_filter_sz <= 0) 2804 return -EINVAL; 2805 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2806 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2807 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2808 break; 2809 case IB_FLOW_SPEC_GRE: 2810 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz); 2811 actual_filter_sz = spec_filter_size(kern_spec_mask, 2812 kern_filter_sz, 2813 ib_filter_sz); 2814 if (actual_filter_sz <= 0) 2815 return -EINVAL; 2816 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2817 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2818 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2819 break; 2820 case IB_FLOW_SPEC_MPLS: 2821 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz); 2822 actual_filter_sz = spec_filter_size(kern_spec_mask, 2823 kern_filter_sz, 2824 ib_filter_sz); 2825 if (actual_filter_sz <= 0) 2826 return -EINVAL; 2827 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2828 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2829 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2830 break; 2831 default: 2832 return -EINVAL; 2833 } 2834 return 0; 2835 } 2836 2837 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2838 union ib_flow_spec *ib_spec) 2839 { 2840 size_t kern_filter_sz; 2841 void *kern_spec_mask; 2842 void *kern_spec_val; 2843 2844 if (check_sub_overflow((size_t)kern_spec->hdr.size, 2845 sizeof(struct ib_uverbs_flow_spec_hdr), 2846 &kern_filter_sz)) 2847 return -EINVAL; 2848 2849 kern_filter_sz /= 2; 2850 2851 kern_spec_val = (void *)kern_spec + 2852 sizeof(struct ib_uverbs_flow_spec_hdr); 2853 kern_spec_mask = kern_spec_val + kern_filter_sz; 2854 2855 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2856 kern_spec_mask, 2857 kern_spec_val, 2858 kern_filter_sz, ib_spec); 2859 } 2860 2861 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2862 struct ib_uverbs_flow_spec *kern_spec, 2863 union ib_flow_spec *ib_spec, 2864 struct ib_uflow_resources *uflow_res) 2865 { 2866 if (kern_spec->reserved) 2867 return -EINVAL; 2868 2869 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2870 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2871 uflow_res); 2872 else 2873 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2874 } 2875 2876 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2877 { 2878 struct ib_uverbs_ex_create_wq cmd; 2879 struct ib_uverbs_ex_create_wq_resp resp = {}; 2880 struct ib_uwq_object *obj; 2881 int err = 0; 2882 struct ib_cq *cq; 2883 struct ib_pd *pd; 2884 struct ib_wq *wq; 2885 struct ib_wq_init_attr wq_init_attr = {}; 2886 struct ib_device *ib_dev; 2887 2888 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2889 if (err) 2890 return err; 2891 2892 if (cmd.comp_mask) 2893 return -EOPNOTSUPP; 2894 2895 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2896 &ib_dev); 2897 if (IS_ERR(obj)) 2898 return PTR_ERR(obj); 2899 2900 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2901 if (!pd) { 2902 err = -EINVAL; 2903 goto err_uobj; 2904 } 2905 2906 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2907 if (!cq) { 2908 err = -EINVAL; 2909 goto err_put_pd; 2910 } 2911 2912 wq_init_attr.cq = cq; 2913 wq_init_attr.max_sge = cmd.max_sge; 2914 wq_init_attr.max_wr = cmd.max_wr; 2915 wq_init_attr.wq_type = cmd.wq_type; 2916 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2917 wq_init_attr.create_flags = cmd.create_flags; 2918 INIT_LIST_HEAD(&obj->uevent.event_list); 2919 obj->uevent.uobject.user_handle = cmd.user_handle; 2920 2921 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2922 if (IS_ERR(wq)) { 2923 err = PTR_ERR(wq); 2924 goto err_put_cq; 2925 } 2926 2927 wq->uobject = obj; 2928 obj->uevent.uobject.object = wq; 2929 wq->wq_type = wq_init_attr.wq_type; 2930 wq->cq = cq; 2931 wq->pd = pd; 2932 wq->device = pd->device; 2933 atomic_set(&wq->usecnt, 0); 2934 atomic_inc(&pd->usecnt); 2935 atomic_inc(&cq->usecnt); 2936 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 2937 if (obj->uevent.event_file) 2938 uverbs_uobject_get(&obj->uevent.event_file->uobj); 2939 2940 uobj_put_obj_read(pd); 2941 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2942 UVERBS_LOOKUP_READ); 2943 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 2944 2945 resp.wq_handle = obj->uevent.uobject.id; 2946 resp.max_sge = wq_init_attr.max_sge; 2947 resp.max_wr = wq_init_attr.max_wr; 2948 resp.wqn = wq->wq_num; 2949 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2950 return uverbs_response(attrs, &resp, sizeof(resp)); 2951 2952 err_put_cq: 2953 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2954 UVERBS_LOOKUP_READ); 2955 err_put_pd: 2956 uobj_put_obj_read(pd); 2957 err_uobj: 2958 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2959 2960 return err; 2961 } 2962 2963 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2964 { 2965 struct ib_uverbs_ex_destroy_wq cmd; 2966 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 2967 struct ib_uobject *uobj; 2968 struct ib_uwq_object *obj; 2969 int ret; 2970 2971 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2972 if (ret) 2973 return ret; 2974 2975 if (cmd.comp_mask) 2976 return -EOPNOTSUPP; 2977 2978 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2979 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 2980 if (IS_ERR(uobj)) 2981 return PTR_ERR(uobj); 2982 2983 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 2984 resp.events_reported = obj->uevent.events_reported; 2985 2986 uobj_put_destroy(uobj); 2987 2988 return uverbs_response(attrs, &resp, sizeof(resp)); 2989 } 2990 2991 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 2992 { 2993 struct ib_uverbs_ex_modify_wq cmd; 2994 struct ib_wq *wq; 2995 struct ib_wq_attr wq_attr = {}; 2996 int ret; 2997 2998 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2999 if (ret) 3000 return ret; 3001 3002 if (!cmd.attr_mask) 3003 return -EINVAL; 3004 3005 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3006 return -EINVAL; 3007 3008 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3009 if (!wq) 3010 return -EINVAL; 3011 3012 if (cmd.attr_mask & IB_WQ_FLAGS) { 3013 wq_attr.flags = cmd.flags; 3014 wq_attr.flags_mask = cmd.flags_mask; 3015 } 3016 3017 if (cmd.attr_mask & IB_WQ_CUR_STATE) { 3018 if (cmd.curr_wq_state > IB_WQS_ERR) 3019 return -EINVAL; 3020 3021 wq_attr.curr_wq_state = cmd.curr_wq_state; 3022 } else { 3023 wq_attr.curr_wq_state = wq->state; 3024 } 3025 3026 if (cmd.attr_mask & IB_WQ_STATE) { 3027 if (cmd.wq_state > IB_WQS_ERR) 3028 return -EINVAL; 3029 3030 wq_attr.wq_state = cmd.wq_state; 3031 } else { 3032 wq_attr.wq_state = wq_attr.curr_wq_state; 3033 } 3034 3035 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3036 &attrs->driver_udata); 3037 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, 3038 UVERBS_LOOKUP_READ); 3039 return ret; 3040 } 3041 3042 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3043 { 3044 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3045 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3046 struct ib_uobject *uobj; 3047 int err; 3048 struct ib_rwq_ind_table_init_attr init_attr = {}; 3049 struct ib_rwq_ind_table *rwq_ind_tbl; 3050 struct ib_wq **wqs = NULL; 3051 u32 *wqs_handles = NULL; 3052 struct ib_wq *wq = NULL; 3053 int i, num_read_wqs; 3054 u32 num_wq_handles; 3055 struct uverbs_req_iter iter; 3056 struct ib_device *ib_dev; 3057 3058 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3059 if (err) 3060 return err; 3061 3062 if (cmd.comp_mask) 3063 return -EOPNOTSUPP; 3064 3065 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3066 return -EINVAL; 3067 3068 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3069 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3070 GFP_KERNEL); 3071 if (!wqs_handles) 3072 return -ENOMEM; 3073 3074 err = uverbs_request_next(&iter, wqs_handles, 3075 num_wq_handles * sizeof(__u32)); 3076 if (err) 3077 goto err_free; 3078 3079 err = uverbs_request_finish(&iter); 3080 if (err) 3081 goto err_free; 3082 3083 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); 3084 if (!wqs) { 3085 err = -ENOMEM; 3086 goto err_free; 3087 } 3088 3089 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3090 num_read_wqs++) { 3091 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3092 wqs_handles[num_read_wqs], attrs); 3093 if (!wq) { 3094 err = -EINVAL; 3095 goto put_wqs; 3096 } 3097 3098 wqs[num_read_wqs] = wq; 3099 atomic_inc(&wqs[num_read_wqs]->usecnt); 3100 } 3101 3102 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3103 if (IS_ERR(uobj)) { 3104 err = PTR_ERR(uobj); 3105 goto put_wqs; 3106 } 3107 3108 rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table); 3109 if (!rwq_ind_tbl) { 3110 err = -ENOMEM; 3111 goto err_uobj; 3112 } 3113 3114 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3115 init_attr.ind_tbl = wqs; 3116 3117 rwq_ind_tbl->ind_tbl = wqs; 3118 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3119 rwq_ind_tbl->uobject = uobj; 3120 uobj->object = rwq_ind_tbl; 3121 rwq_ind_tbl->device = ib_dev; 3122 atomic_set(&rwq_ind_tbl->usecnt, 0); 3123 3124 err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr, 3125 &attrs->driver_udata); 3126 if (err) 3127 goto err_create; 3128 3129 for (i = 0; i < num_wq_handles; i++) 3130 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3131 UVERBS_LOOKUP_READ); 3132 kfree(wqs_handles); 3133 uobj_finalize_uobj_create(uobj, attrs); 3134 3135 resp.ind_tbl_handle = uobj->id; 3136 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3137 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3138 return uverbs_response(attrs, &resp, sizeof(resp)); 3139 3140 err_create: 3141 kfree(rwq_ind_tbl); 3142 err_uobj: 3143 uobj_alloc_abort(uobj, attrs); 3144 put_wqs: 3145 for (i = 0; i < num_read_wqs; i++) { 3146 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3147 UVERBS_LOOKUP_READ); 3148 atomic_dec(&wqs[i]->usecnt); 3149 } 3150 err_free: 3151 kfree(wqs_handles); 3152 kfree(wqs); 3153 return err; 3154 } 3155 3156 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3157 { 3158 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3159 int ret; 3160 3161 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3162 if (ret) 3163 return ret; 3164 3165 if (cmd.comp_mask) 3166 return -EOPNOTSUPP; 3167 3168 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3169 cmd.ind_tbl_handle, attrs); 3170 } 3171 3172 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3173 { 3174 struct ib_uverbs_create_flow cmd; 3175 struct ib_uverbs_create_flow_resp resp = {}; 3176 struct ib_uobject *uobj; 3177 struct ib_flow *flow_id; 3178 struct ib_uverbs_flow_attr *kern_flow_attr; 3179 struct ib_flow_attr *flow_attr; 3180 struct ib_qp *qp; 3181 struct ib_uflow_resources *uflow_res; 3182 struct ib_uverbs_flow_spec_hdr *kern_spec; 3183 struct uverbs_req_iter iter; 3184 int err; 3185 void *ib_spec; 3186 int i; 3187 struct ib_device *ib_dev; 3188 3189 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3190 if (err) 3191 return err; 3192 3193 if (cmd.comp_mask) 3194 return -EINVAL; 3195 3196 if (!capable(CAP_NET_RAW)) 3197 return -EPERM; 3198 3199 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3200 return -EINVAL; 3201 3202 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3203 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3204 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3205 return -EINVAL; 3206 3207 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3208 return -EINVAL; 3209 3210 if (cmd.flow_attr.size > 3211 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3212 return -EINVAL; 3213 3214 if (cmd.flow_attr.reserved[0] || 3215 cmd.flow_attr.reserved[1]) 3216 return -EINVAL; 3217 3218 if (cmd.flow_attr.num_of_specs) { 3219 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3220 GFP_KERNEL); 3221 if (!kern_flow_attr) 3222 return -ENOMEM; 3223 3224 *kern_flow_attr = cmd.flow_attr; 3225 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3226 cmd.flow_attr.size); 3227 if (err) 3228 goto err_free_attr; 3229 } else { 3230 kern_flow_attr = &cmd.flow_attr; 3231 } 3232 3233 err = uverbs_request_finish(&iter); 3234 if (err) 3235 goto err_free_attr; 3236 3237 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3238 if (IS_ERR(uobj)) { 3239 err = PTR_ERR(uobj); 3240 goto err_free_attr; 3241 } 3242 3243 if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) { 3244 err = -EINVAL; 3245 goto err_uobj; 3246 } 3247 3248 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3249 if (!qp) { 3250 err = -EINVAL; 3251 goto err_uobj; 3252 } 3253 3254 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3255 err = -EINVAL; 3256 goto err_put; 3257 } 3258 3259 flow_attr = kzalloc(struct_size(flow_attr, flows, 3260 cmd.flow_attr.num_of_specs), GFP_KERNEL); 3261 if (!flow_attr) { 3262 err = -ENOMEM; 3263 goto err_put; 3264 } 3265 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3266 if (!uflow_res) { 3267 err = -ENOMEM; 3268 goto err_free_flow_attr; 3269 } 3270 3271 flow_attr->type = kern_flow_attr->type; 3272 flow_attr->priority = kern_flow_attr->priority; 3273 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3274 flow_attr->port = kern_flow_attr->port; 3275 flow_attr->flags = kern_flow_attr->flags; 3276 flow_attr->size = sizeof(*flow_attr); 3277 3278 kern_spec = kern_flow_attr->flow_specs; 3279 ib_spec = flow_attr + 1; 3280 for (i = 0; i < flow_attr->num_of_specs && 3281 cmd.flow_attr.size >= sizeof(*kern_spec) && 3282 cmd.flow_attr.size >= kern_spec->size; 3283 i++) { 3284 err = kern_spec_to_ib_spec( 3285 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3286 ib_spec, uflow_res); 3287 if (err) 3288 goto err_free; 3289 3290 flow_attr->size += 3291 ((union ib_flow_spec *) ib_spec)->size; 3292 cmd.flow_attr.size -= kern_spec->size; 3293 kern_spec = ((void *)kern_spec) + kern_spec->size; 3294 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3295 } 3296 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3297 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n", 3298 i, cmd.flow_attr.size); 3299 err = -EINVAL; 3300 goto err_free; 3301 } 3302 3303 flow_id = qp->device->ops.create_flow(qp, flow_attr, 3304 &attrs->driver_udata); 3305 3306 if (IS_ERR(flow_id)) { 3307 err = PTR_ERR(flow_id); 3308 goto err_free; 3309 } 3310 3311 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3312 3313 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3314 UVERBS_LOOKUP_READ); 3315 kfree(flow_attr); 3316 3317 if (cmd.flow_attr.num_of_specs) 3318 kfree(kern_flow_attr); 3319 uobj_finalize_uobj_create(uobj, attrs); 3320 3321 resp.flow_handle = uobj->id; 3322 return uverbs_response(attrs, &resp, sizeof(resp)); 3323 3324 err_free: 3325 ib_uverbs_flow_resources_free(uflow_res); 3326 err_free_flow_attr: 3327 kfree(flow_attr); 3328 err_put: 3329 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3330 UVERBS_LOOKUP_READ); 3331 err_uobj: 3332 uobj_alloc_abort(uobj, attrs); 3333 err_free_attr: 3334 if (cmd.flow_attr.num_of_specs) 3335 kfree(kern_flow_attr); 3336 return err; 3337 } 3338 3339 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3340 { 3341 struct ib_uverbs_destroy_flow cmd; 3342 int ret; 3343 3344 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3345 if (ret) 3346 return ret; 3347 3348 if (cmd.comp_mask) 3349 return -EINVAL; 3350 3351 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3352 } 3353 3354 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3355 struct ib_uverbs_create_xsrq *cmd, 3356 struct ib_udata *udata) 3357 { 3358 struct ib_uverbs_create_srq_resp resp = {}; 3359 struct ib_usrq_object *obj; 3360 struct ib_pd *pd; 3361 struct ib_srq *srq; 3362 struct ib_srq_init_attr attr; 3363 int ret; 3364 struct ib_uobject *xrcd_uobj; 3365 struct ib_device *ib_dev; 3366 3367 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3368 &ib_dev); 3369 if (IS_ERR(obj)) 3370 return PTR_ERR(obj); 3371 3372 if (cmd->srq_type == IB_SRQT_TM) 3373 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3374 3375 if (cmd->srq_type == IB_SRQT_XRC) { 3376 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3377 attrs); 3378 if (IS_ERR(xrcd_uobj)) { 3379 ret = -EINVAL; 3380 goto err; 3381 } 3382 3383 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3384 if (!attr.ext.xrc.xrcd) { 3385 ret = -EINVAL; 3386 goto err_put_xrcd; 3387 } 3388 3389 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3390 atomic_inc(&obj->uxrcd->refcnt); 3391 } 3392 3393 if (ib_srq_has_cq(cmd->srq_type)) { 3394 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3395 cmd->cq_handle, attrs); 3396 if (!attr.ext.cq) { 3397 ret = -EINVAL; 3398 goto err_put_xrcd; 3399 } 3400 } 3401 3402 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3403 if (!pd) { 3404 ret = -EINVAL; 3405 goto err_put_cq; 3406 } 3407 3408 attr.event_handler = ib_uverbs_srq_event_handler; 3409 attr.srq_type = cmd->srq_type; 3410 attr.attr.max_wr = cmd->max_wr; 3411 attr.attr.max_sge = cmd->max_sge; 3412 attr.attr.srq_limit = cmd->srq_limit; 3413 3414 INIT_LIST_HEAD(&obj->uevent.event_list); 3415 obj->uevent.uobject.user_handle = cmd->user_handle; 3416 3417 srq = ib_create_srq_user(pd, &attr, obj, udata); 3418 if (IS_ERR(srq)) { 3419 ret = PTR_ERR(srq); 3420 goto err_put_pd; 3421 } 3422 3423 obj->uevent.uobject.object = srq; 3424 obj->uevent.uobject.user_handle = cmd->user_handle; 3425 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 3426 if (obj->uevent.event_file) 3427 uverbs_uobject_get(&obj->uevent.event_file->uobj); 3428 3429 if (cmd->srq_type == IB_SRQT_XRC) 3430 resp.srqn = srq->ext.xrc.srq_num; 3431 3432 if (cmd->srq_type == IB_SRQT_XRC) 3433 uobj_put_read(xrcd_uobj); 3434 3435 if (ib_srq_has_cq(cmd->srq_type)) 3436 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3437 UVERBS_LOOKUP_READ); 3438 3439 uobj_put_obj_read(pd); 3440 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 3441 3442 resp.srq_handle = obj->uevent.uobject.id; 3443 resp.max_wr = attr.attr.max_wr; 3444 resp.max_sge = attr.attr.max_sge; 3445 return uverbs_response(attrs, &resp, sizeof(resp)); 3446 3447 err_put_pd: 3448 uobj_put_obj_read(pd); 3449 err_put_cq: 3450 if (ib_srq_has_cq(cmd->srq_type)) 3451 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3452 UVERBS_LOOKUP_READ); 3453 3454 err_put_xrcd: 3455 if (cmd->srq_type == IB_SRQT_XRC) { 3456 atomic_dec(&obj->uxrcd->refcnt); 3457 uobj_put_read(xrcd_uobj); 3458 } 3459 3460 err: 3461 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3462 return ret; 3463 } 3464 3465 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3466 { 3467 struct ib_uverbs_create_srq cmd; 3468 struct ib_uverbs_create_xsrq xcmd; 3469 int ret; 3470 3471 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3472 if (ret) 3473 return ret; 3474 3475 memset(&xcmd, 0, sizeof(xcmd)); 3476 xcmd.response = cmd.response; 3477 xcmd.user_handle = cmd.user_handle; 3478 xcmd.srq_type = IB_SRQT_BASIC; 3479 xcmd.pd_handle = cmd.pd_handle; 3480 xcmd.max_wr = cmd.max_wr; 3481 xcmd.max_sge = cmd.max_sge; 3482 xcmd.srq_limit = cmd.srq_limit; 3483 3484 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3485 } 3486 3487 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3488 { 3489 struct ib_uverbs_create_xsrq cmd; 3490 int ret; 3491 3492 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3493 if (ret) 3494 return ret; 3495 3496 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3497 } 3498 3499 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3500 { 3501 struct ib_uverbs_modify_srq cmd; 3502 struct ib_srq *srq; 3503 struct ib_srq_attr attr; 3504 int ret; 3505 3506 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3507 if (ret) 3508 return ret; 3509 3510 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3511 if (!srq) 3512 return -EINVAL; 3513 3514 attr.max_wr = cmd.max_wr; 3515 attr.srq_limit = cmd.srq_limit; 3516 3517 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3518 &attrs->driver_udata); 3519 3520 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3521 UVERBS_LOOKUP_READ); 3522 3523 return ret; 3524 } 3525 3526 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3527 { 3528 struct ib_uverbs_query_srq cmd; 3529 struct ib_uverbs_query_srq_resp resp; 3530 struct ib_srq_attr attr; 3531 struct ib_srq *srq; 3532 int ret; 3533 3534 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3535 if (ret) 3536 return ret; 3537 3538 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3539 if (!srq) 3540 return -EINVAL; 3541 3542 ret = ib_query_srq(srq, &attr); 3543 3544 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3545 UVERBS_LOOKUP_READ); 3546 3547 if (ret) 3548 return ret; 3549 3550 memset(&resp, 0, sizeof resp); 3551 3552 resp.max_wr = attr.max_wr; 3553 resp.max_sge = attr.max_sge; 3554 resp.srq_limit = attr.srq_limit; 3555 3556 return uverbs_response(attrs, &resp, sizeof(resp)); 3557 } 3558 3559 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3560 { 3561 struct ib_uverbs_destroy_srq cmd; 3562 struct ib_uverbs_destroy_srq_resp resp; 3563 struct ib_uobject *uobj; 3564 struct ib_uevent_object *obj; 3565 int ret; 3566 3567 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3568 if (ret) 3569 return ret; 3570 3571 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3572 if (IS_ERR(uobj)) 3573 return PTR_ERR(uobj); 3574 3575 obj = container_of(uobj, struct ib_uevent_object, uobject); 3576 memset(&resp, 0, sizeof(resp)); 3577 resp.events_reported = obj->events_reported; 3578 3579 uobj_put_destroy(uobj); 3580 3581 return uverbs_response(attrs, &resp, sizeof(resp)); 3582 } 3583 3584 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3585 { 3586 struct ib_uverbs_ex_query_device_resp resp = {}; 3587 struct ib_uverbs_ex_query_device cmd; 3588 struct ib_device_attr attr = {0}; 3589 struct ib_ucontext *ucontext; 3590 struct ib_device *ib_dev; 3591 int err; 3592 3593 ucontext = ib_uverbs_get_ucontext(attrs); 3594 if (IS_ERR(ucontext)) 3595 return PTR_ERR(ucontext); 3596 ib_dev = ucontext->device; 3597 3598 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3599 if (err) 3600 return err; 3601 3602 if (cmd.comp_mask) 3603 return -EINVAL; 3604 3605 if (cmd.reserved) 3606 return -EINVAL; 3607 3608 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3609 if (err) 3610 return err; 3611 3612 copy_query_dev_fields(ucontext, &resp.base, &attr); 3613 3614 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3615 resp.odp_caps.per_transport_caps.rc_odp_caps = 3616 attr.odp_caps.per_transport_caps.rc_odp_caps; 3617 resp.odp_caps.per_transport_caps.uc_odp_caps = 3618 attr.odp_caps.per_transport_caps.uc_odp_caps; 3619 resp.odp_caps.per_transport_caps.ud_odp_caps = 3620 attr.odp_caps.per_transport_caps.ud_odp_caps; 3621 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3622 3623 resp.timestamp_mask = attr.timestamp_mask; 3624 resp.hca_core_clock = attr.hca_core_clock; 3625 resp.device_cap_flags_ex = attr.device_cap_flags; 3626 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3627 resp.rss_caps.max_rwq_indirection_tables = 3628 attr.rss_caps.max_rwq_indirection_tables; 3629 resp.rss_caps.max_rwq_indirection_table_size = 3630 attr.rss_caps.max_rwq_indirection_table_size; 3631 resp.max_wq_type_rq = attr.max_wq_type_rq; 3632 resp.raw_packet_caps = attr.raw_packet_caps; 3633 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3634 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3635 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3636 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3637 resp.tm_caps.flags = attr.tm_caps.flags; 3638 resp.cq_moderation_caps.max_cq_moderation_count = 3639 attr.cq_caps.max_cq_moderation_count; 3640 resp.cq_moderation_caps.max_cq_moderation_period = 3641 attr.cq_caps.max_cq_moderation_period; 3642 resp.max_dm_size = attr.max_dm_size; 3643 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3644 3645 return uverbs_response(attrs, &resp, sizeof(resp)); 3646 } 3647 3648 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3649 { 3650 struct ib_uverbs_ex_modify_cq cmd; 3651 struct ib_cq *cq; 3652 int ret; 3653 3654 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3655 if (ret) 3656 return ret; 3657 3658 if (!cmd.attr_mask || cmd.reserved) 3659 return -EINVAL; 3660 3661 if (cmd.attr_mask > IB_CQ_MODERATE) 3662 return -EOPNOTSUPP; 3663 3664 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3665 if (!cq) 3666 return -EINVAL; 3667 3668 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3669 3670 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3671 UVERBS_LOOKUP_READ); 3672 return ret; 3673 } 3674 3675 /* 3676 * Describe the input structs for write(). Some write methods have an input 3677 * only struct, most have an input and output. If the struct has an output then 3678 * the 'response' u64 must be the first field in the request structure. 3679 * 3680 * If udata is present then both the request and response structs have a 3681 * trailing driver_data flex array. In this case the size of the base struct 3682 * cannot be changed. 3683 */ 3684 #define UAPI_DEF_WRITE_IO(req, resp) \ 3685 .write.has_resp = 1 + \ 3686 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3687 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \ 3688 sizeof(u64)), \ 3689 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3690 3691 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3692 3693 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3694 UAPI_DEF_WRITE_IO(req, resp), \ 3695 .write.has_udata = \ 3696 1 + \ 3697 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3698 sizeof(req)) + \ 3699 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3700 sizeof(resp)) 3701 3702 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3703 UAPI_DEF_WRITE_I(req), \ 3704 .write.has_udata = \ 3705 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3706 sizeof(req)) 3707 3708 /* 3709 * The _EX versions are for use with WRITE_EX and allow the last struct member 3710 * to be specified. Buffers that do not include that member will be rejected. 3711 */ 3712 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3713 .write.has_resp = 1, \ 3714 .write.req_size = offsetofend(req, req_last_member), \ 3715 .write.resp_size = offsetofend(resp, resp_last_member) 3716 3717 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3718 .write.req_size = offsetofend(req, req_last_member) 3719 3720 const struct uapi_definition uverbs_def_write_intf[] = { 3721 DECLARE_UVERBS_OBJECT( 3722 UVERBS_OBJECT_AH, 3723 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3724 ib_uverbs_create_ah, 3725 UAPI_DEF_WRITE_UDATA_IO( 3726 struct ib_uverbs_create_ah, 3727 struct ib_uverbs_create_ah_resp)), 3728 DECLARE_UVERBS_WRITE( 3729 IB_USER_VERBS_CMD_DESTROY_AH, 3730 ib_uverbs_destroy_ah, 3731 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)), 3732 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah), 3733 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)), 3734 3735 DECLARE_UVERBS_OBJECT( 3736 UVERBS_OBJECT_COMP_CHANNEL, 3737 DECLARE_UVERBS_WRITE( 3738 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3739 ib_uverbs_create_comp_channel, 3740 UAPI_DEF_WRITE_IO( 3741 struct ib_uverbs_create_comp_channel, 3742 struct ib_uverbs_create_comp_channel_resp))), 3743 3744 DECLARE_UVERBS_OBJECT( 3745 UVERBS_OBJECT_CQ, 3746 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3747 ib_uverbs_create_cq, 3748 UAPI_DEF_WRITE_UDATA_IO( 3749 struct ib_uverbs_create_cq, 3750 struct ib_uverbs_create_cq_resp), 3751 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3752 DECLARE_UVERBS_WRITE( 3753 IB_USER_VERBS_CMD_DESTROY_CQ, 3754 ib_uverbs_destroy_cq, 3755 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3756 struct ib_uverbs_destroy_cq_resp), 3757 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3758 DECLARE_UVERBS_WRITE( 3759 IB_USER_VERBS_CMD_POLL_CQ, 3760 ib_uverbs_poll_cq, 3761 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3762 struct ib_uverbs_poll_cq_resp), 3763 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3764 DECLARE_UVERBS_WRITE( 3765 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3766 ib_uverbs_req_notify_cq, 3767 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3768 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3769 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3770 ib_uverbs_resize_cq, 3771 UAPI_DEF_WRITE_UDATA_IO( 3772 struct ib_uverbs_resize_cq, 3773 struct ib_uverbs_resize_cq_resp), 3774 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3775 DECLARE_UVERBS_WRITE_EX( 3776 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3777 ib_uverbs_ex_create_cq, 3778 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3779 reserved, 3780 struct ib_uverbs_ex_create_cq_resp, 3781 response_length), 3782 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3783 DECLARE_UVERBS_WRITE_EX( 3784 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3785 ib_uverbs_ex_modify_cq, 3786 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3787 UAPI_DEF_METHOD_NEEDS_FN(modify_cq))), 3788 3789 DECLARE_UVERBS_OBJECT( 3790 UVERBS_OBJECT_DEVICE, 3791 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3792 ib_uverbs_get_context, 3793 UAPI_DEF_WRITE_UDATA_IO( 3794 struct ib_uverbs_get_context, 3795 struct ib_uverbs_get_context_resp)), 3796 DECLARE_UVERBS_WRITE( 3797 IB_USER_VERBS_CMD_QUERY_DEVICE, 3798 ib_uverbs_query_device, 3799 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3800 struct ib_uverbs_query_device_resp)), 3801 DECLARE_UVERBS_WRITE( 3802 IB_USER_VERBS_CMD_QUERY_PORT, 3803 ib_uverbs_query_port, 3804 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3805 struct ib_uverbs_query_port_resp), 3806 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3807 DECLARE_UVERBS_WRITE_EX( 3808 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3809 ib_uverbs_ex_query_device, 3810 UAPI_DEF_WRITE_IO_EX( 3811 struct ib_uverbs_ex_query_device, 3812 reserved, 3813 struct ib_uverbs_ex_query_device_resp, 3814 response_length), 3815 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3816 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3817 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3818 3819 DECLARE_UVERBS_OBJECT( 3820 UVERBS_OBJECT_FLOW, 3821 DECLARE_UVERBS_WRITE_EX( 3822 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3823 ib_uverbs_ex_create_flow, 3824 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3825 flow_attr, 3826 struct ib_uverbs_create_flow_resp, 3827 flow_handle), 3828 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3829 DECLARE_UVERBS_WRITE_EX( 3830 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3831 ib_uverbs_ex_destroy_flow, 3832 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3833 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3834 3835 DECLARE_UVERBS_OBJECT( 3836 UVERBS_OBJECT_MR, 3837 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3838 ib_uverbs_dereg_mr, 3839 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3840 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3841 DECLARE_UVERBS_WRITE( 3842 IB_USER_VERBS_CMD_REG_MR, 3843 ib_uverbs_reg_mr, 3844 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3845 struct ib_uverbs_reg_mr_resp), 3846 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3847 DECLARE_UVERBS_WRITE( 3848 IB_USER_VERBS_CMD_REREG_MR, 3849 ib_uverbs_rereg_mr, 3850 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3851 struct ib_uverbs_rereg_mr_resp), 3852 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3853 3854 DECLARE_UVERBS_OBJECT( 3855 UVERBS_OBJECT_MW, 3856 DECLARE_UVERBS_WRITE( 3857 IB_USER_VERBS_CMD_ALLOC_MW, 3858 ib_uverbs_alloc_mw, 3859 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3860 struct ib_uverbs_alloc_mw_resp), 3861 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3862 DECLARE_UVERBS_WRITE( 3863 IB_USER_VERBS_CMD_DEALLOC_MW, 3864 ib_uverbs_dealloc_mw, 3865 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3866 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3867 3868 DECLARE_UVERBS_OBJECT( 3869 UVERBS_OBJECT_PD, 3870 DECLARE_UVERBS_WRITE( 3871 IB_USER_VERBS_CMD_ALLOC_PD, 3872 ib_uverbs_alloc_pd, 3873 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3874 struct ib_uverbs_alloc_pd_resp), 3875 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3876 DECLARE_UVERBS_WRITE( 3877 IB_USER_VERBS_CMD_DEALLOC_PD, 3878 ib_uverbs_dealloc_pd, 3879 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3880 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3881 3882 DECLARE_UVERBS_OBJECT( 3883 UVERBS_OBJECT_QP, 3884 DECLARE_UVERBS_WRITE( 3885 IB_USER_VERBS_CMD_ATTACH_MCAST, 3886 ib_uverbs_attach_mcast, 3887 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3888 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3889 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3890 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3891 ib_uverbs_create_qp, 3892 UAPI_DEF_WRITE_UDATA_IO( 3893 struct ib_uverbs_create_qp, 3894 struct ib_uverbs_create_qp_resp), 3895 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3896 DECLARE_UVERBS_WRITE( 3897 IB_USER_VERBS_CMD_DESTROY_QP, 3898 ib_uverbs_destroy_qp, 3899 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3900 struct ib_uverbs_destroy_qp_resp), 3901 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3902 DECLARE_UVERBS_WRITE( 3903 IB_USER_VERBS_CMD_DETACH_MCAST, 3904 ib_uverbs_detach_mcast, 3905 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3906 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3907 DECLARE_UVERBS_WRITE( 3908 IB_USER_VERBS_CMD_MODIFY_QP, 3909 ib_uverbs_modify_qp, 3910 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3911 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3912 DECLARE_UVERBS_WRITE( 3913 IB_USER_VERBS_CMD_POST_RECV, 3914 ib_uverbs_post_recv, 3915 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3916 struct ib_uverbs_post_recv_resp), 3917 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3918 DECLARE_UVERBS_WRITE( 3919 IB_USER_VERBS_CMD_POST_SEND, 3920 ib_uverbs_post_send, 3921 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3922 struct ib_uverbs_post_send_resp), 3923 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3924 DECLARE_UVERBS_WRITE( 3925 IB_USER_VERBS_CMD_QUERY_QP, 3926 ib_uverbs_query_qp, 3927 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3928 struct ib_uverbs_query_qp_resp), 3929 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3930 DECLARE_UVERBS_WRITE_EX( 3931 IB_USER_VERBS_EX_CMD_CREATE_QP, 3932 ib_uverbs_ex_create_qp, 3933 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3934 comp_mask, 3935 struct ib_uverbs_ex_create_qp_resp, 3936 response_length), 3937 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3938 DECLARE_UVERBS_WRITE_EX( 3939 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3940 ib_uverbs_ex_modify_qp, 3941 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3942 base, 3943 struct ib_uverbs_ex_modify_qp_resp, 3944 response_length), 3945 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3946 3947 DECLARE_UVERBS_OBJECT( 3948 UVERBS_OBJECT_RWQ_IND_TBL, 3949 DECLARE_UVERBS_WRITE_EX( 3950 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3951 ib_uverbs_ex_create_rwq_ind_table, 3952 UAPI_DEF_WRITE_IO_EX( 3953 struct ib_uverbs_ex_create_rwq_ind_table, 3954 log_ind_tbl_size, 3955 struct ib_uverbs_ex_create_rwq_ind_table_resp, 3956 ind_tbl_num), 3957 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 3958 DECLARE_UVERBS_WRITE_EX( 3959 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 3960 ib_uverbs_ex_destroy_rwq_ind_table, 3961 UAPI_DEF_WRITE_I( 3962 struct ib_uverbs_ex_destroy_rwq_ind_table), 3963 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 3964 3965 DECLARE_UVERBS_OBJECT( 3966 UVERBS_OBJECT_WQ, 3967 DECLARE_UVERBS_WRITE_EX( 3968 IB_USER_VERBS_EX_CMD_CREATE_WQ, 3969 ib_uverbs_ex_create_wq, 3970 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 3971 max_sge, 3972 struct ib_uverbs_ex_create_wq_resp, 3973 wqn), 3974 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 3975 DECLARE_UVERBS_WRITE_EX( 3976 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 3977 ib_uverbs_ex_destroy_wq, 3978 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 3979 wq_handle, 3980 struct ib_uverbs_ex_destroy_wq_resp, 3981 reserved), 3982 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 3983 DECLARE_UVERBS_WRITE_EX( 3984 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 3985 ib_uverbs_ex_modify_wq, 3986 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 3987 curr_wq_state), 3988 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 3989 3990 DECLARE_UVERBS_OBJECT( 3991 UVERBS_OBJECT_SRQ, 3992 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 3993 ib_uverbs_create_srq, 3994 UAPI_DEF_WRITE_UDATA_IO( 3995 struct ib_uverbs_create_srq, 3996 struct ib_uverbs_create_srq_resp), 3997 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 3998 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 3999 ib_uverbs_create_xsrq, 4000 UAPI_DEF_WRITE_UDATA_IO( 4001 struct ib_uverbs_create_xsrq, 4002 struct ib_uverbs_create_srq_resp), 4003 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4004 DECLARE_UVERBS_WRITE( 4005 IB_USER_VERBS_CMD_DESTROY_SRQ, 4006 ib_uverbs_destroy_srq, 4007 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4008 struct ib_uverbs_destroy_srq_resp), 4009 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4010 DECLARE_UVERBS_WRITE( 4011 IB_USER_VERBS_CMD_MODIFY_SRQ, 4012 ib_uverbs_modify_srq, 4013 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4014 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4015 DECLARE_UVERBS_WRITE( 4016 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4017 ib_uverbs_post_srq_recv, 4018 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4019 struct ib_uverbs_post_srq_recv_resp), 4020 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4021 DECLARE_UVERBS_WRITE( 4022 IB_USER_VERBS_CMD_QUERY_SRQ, 4023 ib_uverbs_query_srq, 4024 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4025 struct ib_uverbs_query_srq_resp), 4026 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4027 4028 DECLARE_UVERBS_OBJECT( 4029 UVERBS_OBJECT_XRCD, 4030 DECLARE_UVERBS_WRITE( 4031 IB_USER_VERBS_CMD_CLOSE_XRCD, 4032 ib_uverbs_close_xrcd, 4033 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)), 4034 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4035 ib_uverbs_open_qp, 4036 UAPI_DEF_WRITE_UDATA_IO( 4037 struct ib_uverbs_open_qp, 4038 struct ib_uverbs_create_qp_resp)), 4039 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4040 ib_uverbs_open_xrcd, 4041 UAPI_DEF_WRITE_UDATA_IO( 4042 struct ib_uverbs_open_xrcd, 4043 struct ib_uverbs_open_xrcd_resp)), 4044 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd), 4045 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)), 4046 4047 {}, 4048 }; 4049