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