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 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs) 207 { 208 struct ib_uverbs_file *file = attrs->ufile; 209 struct ib_uverbs_get_context cmd; 210 struct ib_uverbs_get_context_resp resp; 211 struct ib_ucontext *ucontext; 212 struct file *filp; 213 struct ib_rdmacg_object cg_obj; 214 struct ib_device *ib_dev; 215 int ret; 216 217 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 218 if (ret) 219 return ret; 220 221 mutex_lock(&file->ucontext_lock); 222 ib_dev = srcu_dereference(file->device->ib_dev, 223 &file->device->disassociate_srcu); 224 if (!ib_dev) { 225 ret = -EIO; 226 goto err; 227 } 228 229 if (file->ucontext) { 230 ret = -EINVAL; 231 goto err; 232 } 233 234 ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE); 235 if (ret) 236 goto err; 237 238 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext); 239 if (!ucontext) { 240 ret = -ENOMEM; 241 goto err_alloc; 242 } 243 244 attrs->context = ucontext; 245 246 ucontext->res.type = RDMA_RESTRACK_CTX; 247 ucontext->device = ib_dev; 248 ucontext->cg_obj = cg_obj; 249 /* ufile is required when some objects are released */ 250 ucontext->ufile = file; 251 252 ucontext->closing = false; 253 ucontext->cleanup_retryable = false; 254 255 ret = get_unused_fd_flags(O_CLOEXEC); 256 if (ret < 0) 257 goto err_free; 258 resp.async_fd = ret; 259 260 filp = ib_uverbs_alloc_async_event_file(file, ib_dev); 261 if (IS_ERR(filp)) { 262 ret = PTR_ERR(filp); 263 goto err_fd; 264 } 265 266 resp.num_comp_vectors = file->device->num_comp_vectors; 267 268 ret = uverbs_response(attrs, &resp, sizeof(resp)); 269 if (ret) 270 goto err_file; 271 272 ret = ib_dev->ops.alloc_ucontext(ucontext, &attrs->driver_udata); 273 if (ret) 274 goto err_file; 275 276 rdma_restrack_uadd(&ucontext->res); 277 278 fd_install(resp.async_fd, filp); 279 280 /* 281 * Make sure that ib_uverbs_get_ucontext() sees the pointer update 282 * only after all writes to setup the ucontext have completed 283 */ 284 smp_store_release(&file->ucontext, ucontext); 285 286 mutex_unlock(&file->ucontext_lock); 287 288 return 0; 289 290 err_file: 291 ib_uverbs_free_async_event_file(file); 292 fput(filp); 293 294 err_fd: 295 put_unused_fd(resp.async_fd); 296 297 err_free: 298 kfree(ucontext); 299 300 err_alloc: 301 ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE); 302 303 err: 304 mutex_unlock(&file->ucontext_lock); 305 return ret; 306 } 307 308 static void copy_query_dev_fields(struct ib_ucontext *ucontext, 309 struct ib_uverbs_query_device_resp *resp, 310 struct ib_device_attr *attr) 311 { 312 struct ib_device *ib_dev = ucontext->device; 313 314 resp->fw_ver = attr->fw_ver; 315 resp->node_guid = ib_dev->node_guid; 316 resp->sys_image_guid = attr->sys_image_guid; 317 resp->max_mr_size = attr->max_mr_size; 318 resp->page_size_cap = attr->page_size_cap; 319 resp->vendor_id = attr->vendor_id; 320 resp->vendor_part_id = attr->vendor_part_id; 321 resp->hw_ver = attr->hw_ver; 322 resp->max_qp = attr->max_qp; 323 resp->max_qp_wr = attr->max_qp_wr; 324 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags); 325 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge); 326 resp->max_sge_rd = attr->max_sge_rd; 327 resp->max_cq = attr->max_cq; 328 resp->max_cqe = attr->max_cqe; 329 resp->max_mr = attr->max_mr; 330 resp->max_pd = attr->max_pd; 331 resp->max_qp_rd_atom = attr->max_qp_rd_atom; 332 resp->max_ee_rd_atom = attr->max_ee_rd_atom; 333 resp->max_res_rd_atom = attr->max_res_rd_atom; 334 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; 335 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; 336 resp->atomic_cap = attr->atomic_cap; 337 resp->max_ee = attr->max_ee; 338 resp->max_rdd = attr->max_rdd; 339 resp->max_mw = attr->max_mw; 340 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; 341 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; 342 resp->max_mcast_grp = attr->max_mcast_grp; 343 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; 344 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; 345 resp->max_ah = attr->max_ah; 346 resp->max_fmr = attr->max_fmr; 347 resp->max_map_per_fmr = attr->max_map_per_fmr; 348 resp->max_srq = attr->max_srq; 349 resp->max_srq_wr = attr->max_srq_wr; 350 resp->max_srq_sge = attr->max_srq_sge; 351 resp->max_pkeys = attr->max_pkeys; 352 resp->local_ca_ack_delay = attr->local_ca_ack_delay; 353 resp->phys_port_cnt = ib_dev->phys_port_cnt; 354 } 355 356 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs) 357 { 358 struct ib_uverbs_query_device cmd; 359 struct ib_uverbs_query_device_resp resp; 360 struct ib_ucontext *ucontext; 361 int ret; 362 363 ucontext = ib_uverbs_get_ucontext(attrs); 364 if (IS_ERR(ucontext)) 365 return PTR_ERR(ucontext); 366 367 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 368 if (ret) 369 return ret; 370 371 memset(&resp, 0, sizeof resp); 372 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs); 373 374 return uverbs_response(attrs, &resp, sizeof(resp)); 375 } 376 377 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs) 378 { 379 struct ib_uverbs_query_port cmd; 380 struct ib_uverbs_query_port_resp resp; 381 struct ib_port_attr attr; 382 int ret; 383 struct ib_ucontext *ucontext; 384 struct ib_device *ib_dev; 385 386 ucontext = ib_uverbs_get_ucontext(attrs); 387 if (IS_ERR(ucontext)) 388 return PTR_ERR(ucontext); 389 ib_dev = ucontext->device; 390 391 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 392 if (ret) 393 return ret; 394 395 ret = ib_query_port(ib_dev, cmd.port_num, &attr); 396 if (ret) 397 return ret; 398 399 memset(&resp, 0, sizeof resp); 400 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num); 401 402 return uverbs_response(attrs, &resp, sizeof(resp)); 403 } 404 405 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs) 406 { 407 struct ib_uverbs_alloc_pd cmd; 408 struct ib_uverbs_alloc_pd_resp resp; 409 struct ib_uobject *uobj; 410 struct ib_pd *pd; 411 int ret; 412 struct ib_device *ib_dev; 413 414 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 415 if (ret) 416 return ret; 417 418 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev); 419 if (IS_ERR(uobj)) 420 return PTR_ERR(uobj); 421 422 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd); 423 if (!pd) { 424 ret = -ENOMEM; 425 goto err; 426 } 427 428 pd->device = ib_dev; 429 pd->uobject = uobj; 430 pd->__internal_mr = NULL; 431 atomic_set(&pd->usecnt, 0); 432 pd->res.type = RDMA_RESTRACK_PD; 433 434 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata); 435 if (ret) 436 goto err_alloc; 437 438 uobj->object = pd; 439 memset(&resp, 0, sizeof resp); 440 resp.pd_handle = uobj->id; 441 rdma_restrack_uadd(&pd->res); 442 443 ret = uverbs_response(attrs, &resp, sizeof(resp)); 444 if (ret) 445 goto err_copy; 446 447 return uobj_alloc_commit(uobj, attrs); 448 449 err_copy: 450 ib_dealloc_pd_user(pd, uverbs_get_cleared_udata(attrs)); 451 pd = NULL; 452 err_alloc: 453 kfree(pd); 454 err: 455 uobj_alloc_abort(uobj, attrs); 456 return ret; 457 } 458 459 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs) 460 { 461 struct ib_uverbs_dealloc_pd cmd; 462 int ret; 463 464 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 465 if (ret) 466 return ret; 467 468 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 469 } 470 471 struct xrcd_table_entry { 472 struct rb_node node; 473 struct ib_xrcd *xrcd; 474 struct inode *inode; 475 }; 476 477 static int xrcd_table_insert(struct ib_uverbs_device *dev, 478 struct inode *inode, 479 struct ib_xrcd *xrcd) 480 { 481 struct xrcd_table_entry *entry, *scan; 482 struct rb_node **p = &dev->xrcd_tree.rb_node; 483 struct rb_node *parent = NULL; 484 485 entry = kmalloc(sizeof *entry, GFP_KERNEL); 486 if (!entry) 487 return -ENOMEM; 488 489 entry->xrcd = xrcd; 490 entry->inode = inode; 491 492 while (*p) { 493 parent = *p; 494 scan = rb_entry(parent, struct xrcd_table_entry, node); 495 496 if (inode < scan->inode) { 497 p = &(*p)->rb_left; 498 } else if (inode > scan->inode) { 499 p = &(*p)->rb_right; 500 } else { 501 kfree(entry); 502 return -EEXIST; 503 } 504 } 505 506 rb_link_node(&entry->node, parent, p); 507 rb_insert_color(&entry->node, &dev->xrcd_tree); 508 igrab(inode); 509 return 0; 510 } 511 512 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, 513 struct inode *inode) 514 { 515 struct xrcd_table_entry *entry; 516 struct rb_node *p = dev->xrcd_tree.rb_node; 517 518 while (p) { 519 entry = rb_entry(p, struct xrcd_table_entry, node); 520 521 if (inode < entry->inode) 522 p = p->rb_left; 523 else if (inode > entry->inode) 524 p = p->rb_right; 525 else 526 return entry; 527 } 528 529 return NULL; 530 } 531 532 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) 533 { 534 struct xrcd_table_entry *entry; 535 536 entry = xrcd_table_search(dev, inode); 537 if (!entry) 538 return NULL; 539 540 return entry->xrcd; 541 } 542 543 static void xrcd_table_delete(struct ib_uverbs_device *dev, 544 struct inode *inode) 545 { 546 struct xrcd_table_entry *entry; 547 548 entry = xrcd_table_search(dev, inode); 549 if (entry) { 550 iput(inode); 551 rb_erase(&entry->node, &dev->xrcd_tree); 552 kfree(entry); 553 } 554 } 555 556 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs) 557 { 558 struct ib_uverbs_device *ibudev = attrs->ufile->device; 559 struct ib_uverbs_open_xrcd cmd; 560 struct ib_uverbs_open_xrcd_resp resp; 561 struct ib_uxrcd_object *obj; 562 struct ib_xrcd *xrcd = NULL; 563 struct fd f = {NULL, 0}; 564 struct inode *inode = NULL; 565 int ret = 0; 566 int new_xrcd = 0; 567 struct ib_device *ib_dev; 568 569 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 570 if (ret) 571 return ret; 572 573 mutex_lock(&ibudev->xrcd_tree_mutex); 574 575 if (cmd.fd != -1) { 576 /* search for file descriptor */ 577 f = fdget(cmd.fd); 578 if (!f.file) { 579 ret = -EBADF; 580 goto err_tree_mutex_unlock; 581 } 582 583 inode = file_inode(f.file); 584 xrcd = find_xrcd(ibudev, inode); 585 if (!xrcd && !(cmd.oflags & O_CREAT)) { 586 /* no file descriptor. Need CREATE flag */ 587 ret = -EAGAIN; 588 goto err_tree_mutex_unlock; 589 } 590 591 if (xrcd && cmd.oflags & O_EXCL) { 592 ret = -EINVAL; 593 goto err_tree_mutex_unlock; 594 } 595 } 596 597 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs, 598 &ib_dev); 599 if (IS_ERR(obj)) { 600 ret = PTR_ERR(obj); 601 goto err_tree_mutex_unlock; 602 } 603 604 if (!xrcd) { 605 xrcd = ib_dev->ops.alloc_xrcd(ib_dev, &attrs->driver_udata); 606 if (IS_ERR(xrcd)) { 607 ret = PTR_ERR(xrcd); 608 goto err; 609 } 610 611 xrcd->inode = inode; 612 xrcd->device = ib_dev; 613 atomic_set(&xrcd->usecnt, 0); 614 mutex_init(&xrcd->tgt_qp_mutex); 615 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 616 new_xrcd = 1; 617 } 618 619 atomic_set(&obj->refcnt, 0); 620 obj->uobject.object = xrcd; 621 memset(&resp, 0, sizeof resp); 622 resp.xrcd_handle = obj->uobject.id; 623 624 if (inode) { 625 if (new_xrcd) { 626 /* create new inode/xrcd table entry */ 627 ret = xrcd_table_insert(ibudev, inode, xrcd); 628 if (ret) 629 goto err_dealloc_xrcd; 630 } 631 atomic_inc(&xrcd->usecnt); 632 } 633 634 ret = uverbs_response(attrs, &resp, sizeof(resp)); 635 if (ret) 636 goto err_copy; 637 638 if (f.file) 639 fdput(f); 640 641 mutex_unlock(&ibudev->xrcd_tree_mutex); 642 643 return uobj_alloc_commit(&obj->uobject, attrs); 644 645 err_copy: 646 if (inode) { 647 if (new_xrcd) 648 xrcd_table_delete(ibudev, inode); 649 atomic_dec(&xrcd->usecnt); 650 } 651 652 err_dealloc_xrcd: 653 ib_dealloc_xrcd(xrcd, uverbs_get_cleared_udata(attrs)); 654 655 err: 656 uobj_alloc_abort(&obj->uobject, attrs); 657 658 err_tree_mutex_unlock: 659 if (f.file) 660 fdput(f); 661 662 mutex_unlock(&ibudev->xrcd_tree_mutex); 663 664 return ret; 665 } 666 667 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) 668 { 669 struct ib_uverbs_close_xrcd cmd; 670 int ret; 671 672 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 673 if (ret) 674 return ret; 675 676 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); 677 } 678 679 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, 680 enum rdma_remove_reason why, 681 struct uverbs_attr_bundle *attrs) 682 { 683 struct inode *inode; 684 int ret; 685 struct ib_uverbs_device *dev = attrs->ufile->device; 686 687 inode = xrcd->inode; 688 if (inode && !atomic_dec_and_test(&xrcd->usecnt)) 689 return 0; 690 691 ret = ib_dealloc_xrcd(xrcd, &attrs->driver_udata); 692 693 if (ib_is_destroy_retryable(ret, why, uobject)) { 694 atomic_inc(&xrcd->usecnt); 695 return ret; 696 } 697 698 if (inode) 699 xrcd_table_delete(dev, inode); 700 701 return ret; 702 } 703 704 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) 705 { 706 struct ib_uverbs_reg_mr cmd; 707 struct ib_uverbs_reg_mr_resp resp; 708 struct ib_uobject *uobj; 709 struct ib_pd *pd; 710 struct ib_mr *mr; 711 int ret; 712 struct ib_device *ib_dev; 713 714 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 715 if (ret) 716 return ret; 717 718 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 719 return -EINVAL; 720 721 ret = ib_check_mr_access(cmd.access_flags); 722 if (ret) 723 return ret; 724 725 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 726 if (IS_ERR(uobj)) 727 return PTR_ERR(uobj); 728 729 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 730 if (!pd) { 731 ret = -EINVAL; 732 goto err_free; 733 } 734 735 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) { 736 if (!(pd->device->attrs.device_cap_flags & 737 IB_DEVICE_ON_DEMAND_PAGING)) { 738 pr_debug("ODP support not available\n"); 739 ret = -EINVAL; 740 goto err_put; 741 } 742 } 743 744 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 745 cmd.access_flags, 746 &attrs->driver_udata); 747 if (IS_ERR(mr)) { 748 ret = PTR_ERR(mr); 749 goto err_put; 750 } 751 752 mr->device = pd->device; 753 mr->pd = pd; 754 mr->type = IB_MR_TYPE_USER; 755 mr->dm = NULL; 756 mr->sig_attrs = NULL; 757 mr->uobject = uobj; 758 atomic_inc(&pd->usecnt); 759 mr->res.type = RDMA_RESTRACK_MR; 760 rdma_restrack_uadd(&mr->res); 761 762 uobj->object = mr; 763 764 memset(&resp, 0, sizeof resp); 765 resp.lkey = mr->lkey; 766 resp.rkey = mr->rkey; 767 resp.mr_handle = uobj->id; 768 769 ret = uverbs_response(attrs, &resp, sizeof(resp)); 770 if (ret) 771 goto err_copy; 772 773 uobj_put_obj_read(pd); 774 775 return uobj_alloc_commit(uobj, attrs); 776 777 err_copy: 778 ib_dereg_mr_user(mr, uverbs_get_cleared_udata(attrs)); 779 780 err_put: 781 uobj_put_obj_read(pd); 782 783 err_free: 784 uobj_alloc_abort(uobj, attrs); 785 return ret; 786 } 787 788 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 789 { 790 struct ib_uverbs_rereg_mr cmd; 791 struct ib_uverbs_rereg_mr_resp resp; 792 struct ib_pd *pd = NULL; 793 struct ib_mr *mr; 794 struct ib_pd *old_pd; 795 int ret; 796 struct ib_uobject *uobj; 797 798 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 799 if (ret) 800 return ret; 801 802 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) 803 return -EINVAL; 804 805 if ((cmd.flags & IB_MR_REREG_TRANS) && 806 (!cmd.start || !cmd.hca_va || 0 >= cmd.length || 807 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) 808 return -EINVAL; 809 810 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 811 if (IS_ERR(uobj)) 812 return PTR_ERR(uobj); 813 814 mr = uobj->object; 815 816 if (mr->dm) { 817 ret = -EINVAL; 818 goto put_uobjs; 819 } 820 821 if (cmd.flags & IB_MR_REREG_ACCESS) { 822 ret = ib_check_mr_access(cmd.access_flags); 823 if (ret) 824 goto put_uobjs; 825 } 826 827 if (cmd.flags & IB_MR_REREG_PD) { 828 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 829 attrs); 830 if (!pd) { 831 ret = -EINVAL; 832 goto put_uobjs; 833 } 834 } 835 836 old_pd = mr->pd; 837 ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start, 838 cmd.length, cmd.hca_va, 839 cmd.access_flags, pd, 840 &attrs->driver_udata); 841 if (ret) 842 goto put_uobj_pd; 843 844 if (cmd.flags & IB_MR_REREG_PD) { 845 atomic_inc(&pd->usecnt); 846 mr->pd = pd; 847 atomic_dec(&old_pd->usecnt); 848 } 849 850 memset(&resp, 0, sizeof(resp)); 851 resp.lkey = mr->lkey; 852 resp.rkey = mr->rkey; 853 854 ret = uverbs_response(attrs, &resp, sizeof(resp)); 855 856 put_uobj_pd: 857 if (cmd.flags & IB_MR_REREG_PD) 858 uobj_put_obj_read(pd); 859 860 put_uobjs: 861 uobj_put_write(uobj); 862 863 return ret; 864 } 865 866 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) 867 { 868 struct ib_uverbs_dereg_mr cmd; 869 int ret; 870 871 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 872 if (ret) 873 return ret; 874 875 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 876 } 877 878 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 879 { 880 struct ib_uverbs_alloc_mw cmd; 881 struct ib_uverbs_alloc_mw_resp resp; 882 struct ib_uobject *uobj; 883 struct ib_pd *pd; 884 struct ib_mw *mw; 885 int ret; 886 struct ib_device *ib_dev; 887 888 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 889 if (ret) 890 return ret; 891 892 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 893 if (IS_ERR(uobj)) 894 return PTR_ERR(uobj); 895 896 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 897 if (!pd) { 898 ret = -EINVAL; 899 goto err_free; 900 } 901 902 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 903 ret = -EINVAL; 904 goto err_put; 905 } 906 907 mw = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata); 908 if (IS_ERR(mw)) { 909 ret = PTR_ERR(mw); 910 goto err_put; 911 } 912 913 mw->device = pd->device; 914 mw->pd = pd; 915 mw->uobject = uobj; 916 atomic_inc(&pd->usecnt); 917 918 uobj->object = mw; 919 920 memset(&resp, 0, sizeof(resp)); 921 resp.rkey = mw->rkey; 922 resp.mw_handle = uobj->id; 923 924 ret = uverbs_response(attrs, &resp, sizeof(resp)); 925 if (ret) 926 goto err_copy; 927 928 uobj_put_obj_read(pd); 929 return uobj_alloc_commit(uobj, attrs); 930 931 err_copy: 932 uverbs_dealloc_mw(mw); 933 err_put: 934 uobj_put_obj_read(pd); 935 err_free: 936 uobj_alloc_abort(uobj, attrs); 937 return ret; 938 } 939 940 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) 941 { 942 struct ib_uverbs_dealloc_mw cmd; 943 int ret; 944 945 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 946 if (ret) 947 return ret; 948 949 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); 950 } 951 952 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) 953 { 954 struct ib_uverbs_create_comp_channel cmd; 955 struct ib_uverbs_create_comp_channel_resp resp; 956 struct ib_uobject *uobj; 957 struct ib_uverbs_completion_event_file *ev_file; 958 struct ib_device *ib_dev; 959 int ret; 960 961 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 962 if (ret) 963 return ret; 964 965 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); 966 if (IS_ERR(uobj)) 967 return PTR_ERR(uobj); 968 969 resp.fd = uobj->id; 970 971 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, 972 uobj); 973 ib_uverbs_init_event_queue(&ev_file->ev_queue); 974 975 ret = uverbs_response(attrs, &resp, sizeof(resp)); 976 if (ret) { 977 uobj_alloc_abort(uobj, attrs); 978 return ret; 979 } 980 981 return uobj_alloc_commit(uobj, attrs); 982 } 983 984 static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs, 985 struct ib_uverbs_ex_create_cq *cmd) 986 { 987 struct ib_ucq_object *obj; 988 struct ib_uverbs_completion_event_file *ev_file = NULL; 989 struct ib_cq *cq; 990 int ret; 991 struct ib_uverbs_ex_create_cq_resp resp; 992 struct ib_cq_init_attr attr = {}; 993 struct ib_device *ib_dev; 994 995 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) 996 return ERR_PTR(-EINVAL); 997 998 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, 999 &ib_dev); 1000 if (IS_ERR(obj)) 1001 return obj; 1002 1003 if (cmd->comp_channel >= 0) { 1004 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); 1005 if (IS_ERR(ev_file)) { 1006 ret = PTR_ERR(ev_file); 1007 goto err; 1008 } 1009 } 1010 1011 obj->uobject.user_handle = cmd->user_handle; 1012 obj->comp_events_reported = 0; 1013 obj->async_events_reported = 0; 1014 INIT_LIST_HEAD(&obj->comp_list); 1015 INIT_LIST_HEAD(&obj->async_list); 1016 1017 attr.cqe = cmd->cqe; 1018 attr.comp_vector = cmd->comp_vector; 1019 attr.flags = cmd->flags; 1020 1021 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 1022 if (!cq) { 1023 ret = -ENOMEM; 1024 goto err_file; 1025 } 1026 cq->device = ib_dev; 1027 cq->uobject = &obj->uobject; 1028 cq->comp_handler = ib_uverbs_comp_handler; 1029 cq->event_handler = ib_uverbs_cq_event_handler; 1030 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 1031 atomic_set(&cq->usecnt, 0); 1032 1033 ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata); 1034 if (ret) 1035 goto err_free; 1036 1037 obj->uobject.object = cq; 1038 memset(&resp, 0, sizeof resp); 1039 resp.base.cq_handle = obj->uobject.id; 1040 resp.base.cqe = cq->cqe; 1041 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1042 1043 cq->res.type = RDMA_RESTRACK_CQ; 1044 rdma_restrack_uadd(&cq->res); 1045 1046 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1047 if (ret) 1048 goto err_cb; 1049 1050 ret = uobj_alloc_commit(&obj->uobject, attrs); 1051 if (ret) 1052 return ERR_PTR(ret); 1053 return obj; 1054 1055 err_cb: 1056 ib_destroy_cq_user(cq, uverbs_get_cleared_udata(attrs)); 1057 cq = NULL; 1058 err_free: 1059 kfree(cq); 1060 err_file: 1061 if (ev_file) 1062 ib_uverbs_release_ucq(attrs->ufile, ev_file, obj); 1063 1064 err: 1065 uobj_alloc_abort(&obj->uobject, attrs); 1066 1067 return ERR_PTR(ret); 1068 } 1069 1070 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) 1071 { 1072 struct ib_uverbs_create_cq cmd; 1073 struct ib_uverbs_ex_create_cq cmd_ex; 1074 struct ib_ucq_object *obj; 1075 int ret; 1076 1077 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1078 if (ret) 1079 return ret; 1080 1081 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1082 cmd_ex.user_handle = cmd.user_handle; 1083 cmd_ex.cqe = cmd.cqe; 1084 cmd_ex.comp_vector = cmd.comp_vector; 1085 cmd_ex.comp_channel = cmd.comp_channel; 1086 1087 obj = create_cq(attrs, &cmd_ex); 1088 return PTR_ERR_OR_ZERO(obj); 1089 } 1090 1091 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) 1092 { 1093 struct ib_uverbs_ex_create_cq cmd; 1094 struct ib_ucq_object *obj; 1095 int ret; 1096 1097 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1098 if (ret) 1099 return ret; 1100 1101 if (cmd.comp_mask) 1102 return -EINVAL; 1103 1104 if (cmd.reserved) 1105 return -EINVAL; 1106 1107 obj = create_cq(attrs, &cmd); 1108 return PTR_ERR_OR_ZERO(obj); 1109 } 1110 1111 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) 1112 { 1113 struct ib_uverbs_resize_cq cmd; 1114 struct ib_uverbs_resize_cq_resp resp = {}; 1115 struct ib_cq *cq; 1116 int ret = -EINVAL; 1117 1118 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1119 if (ret) 1120 return ret; 1121 1122 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1123 if (!cq) 1124 return -EINVAL; 1125 1126 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); 1127 if (ret) 1128 goto out; 1129 1130 resp.cqe = cq->cqe; 1131 1132 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1133 out: 1134 uobj_put_obj_read(cq); 1135 1136 return ret; 1137 } 1138 1139 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1140 struct ib_wc *wc) 1141 { 1142 struct ib_uverbs_wc tmp; 1143 1144 tmp.wr_id = wc->wr_id; 1145 tmp.status = wc->status; 1146 tmp.opcode = wc->opcode; 1147 tmp.vendor_err = wc->vendor_err; 1148 tmp.byte_len = wc->byte_len; 1149 tmp.ex.imm_data = wc->ex.imm_data; 1150 tmp.qp_num = wc->qp->qp_num; 1151 tmp.src_qp = wc->src_qp; 1152 tmp.wc_flags = wc->wc_flags; 1153 tmp.pkey_index = wc->pkey_index; 1154 if (rdma_cap_opa_ah(ib_dev, wc->port_num)) 1155 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); 1156 else 1157 tmp.slid = ib_lid_cpu16(wc->slid); 1158 tmp.sl = wc->sl; 1159 tmp.dlid_path_bits = wc->dlid_path_bits; 1160 tmp.port_num = wc->port_num; 1161 tmp.reserved = 0; 1162 1163 if (copy_to_user(dest, &tmp, sizeof tmp)) 1164 return -EFAULT; 1165 1166 return 0; 1167 } 1168 1169 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1170 { 1171 struct ib_uverbs_poll_cq cmd; 1172 struct ib_uverbs_poll_cq_resp resp; 1173 u8 __user *header_ptr; 1174 u8 __user *data_ptr; 1175 struct ib_cq *cq; 1176 struct ib_wc wc; 1177 int ret; 1178 1179 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1180 if (ret) 1181 return ret; 1182 1183 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1184 if (!cq) 1185 return -EINVAL; 1186 1187 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1188 header_ptr = attrs->ucore.outbuf; 1189 data_ptr = header_ptr + sizeof resp; 1190 1191 memset(&resp, 0, sizeof resp); 1192 while (resp.count < cmd.ne) { 1193 ret = ib_poll_cq(cq, 1, &wc); 1194 if (ret < 0) 1195 goto out_put; 1196 if (!ret) 1197 break; 1198 1199 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1200 if (ret) 1201 goto out_put; 1202 1203 data_ptr += sizeof(struct ib_uverbs_wc); 1204 ++resp.count; 1205 } 1206 1207 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1208 ret = -EFAULT; 1209 goto out_put; 1210 } 1211 ret = 0; 1212 1213 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1214 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1215 1216 out_put: 1217 uobj_put_obj_read(cq); 1218 return ret; 1219 } 1220 1221 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1222 { 1223 struct ib_uverbs_req_notify_cq cmd; 1224 struct ib_cq *cq; 1225 int ret; 1226 1227 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1228 if (ret) 1229 return ret; 1230 1231 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1232 if (!cq) 1233 return -EINVAL; 1234 1235 ib_req_notify_cq(cq, cmd.solicited_only ? 1236 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1237 1238 uobj_put_obj_read(cq); 1239 1240 return 0; 1241 } 1242 1243 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1244 { 1245 struct ib_uverbs_destroy_cq cmd; 1246 struct ib_uverbs_destroy_cq_resp resp; 1247 struct ib_uobject *uobj; 1248 struct ib_ucq_object *obj; 1249 int ret; 1250 1251 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1252 if (ret) 1253 return ret; 1254 1255 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1256 if (IS_ERR(uobj)) 1257 return PTR_ERR(uobj); 1258 1259 obj = container_of(uobj, struct ib_ucq_object, uobject); 1260 memset(&resp, 0, sizeof(resp)); 1261 resp.comp_events_reported = obj->comp_events_reported; 1262 resp.async_events_reported = obj->async_events_reported; 1263 1264 uobj_put_destroy(uobj); 1265 1266 return uverbs_response(attrs, &resp, sizeof(resp)); 1267 } 1268 1269 static int create_qp(struct uverbs_attr_bundle *attrs, 1270 struct ib_uverbs_ex_create_qp *cmd) 1271 { 1272 struct ib_uqp_object *obj; 1273 struct ib_device *device; 1274 struct ib_pd *pd = NULL; 1275 struct ib_xrcd *xrcd = NULL; 1276 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1277 struct ib_cq *scq = NULL, *rcq = NULL; 1278 struct ib_srq *srq = NULL; 1279 struct ib_qp *qp; 1280 struct ib_qp_init_attr attr = {}; 1281 struct ib_uverbs_ex_create_qp_resp resp; 1282 int ret; 1283 struct ib_rwq_ind_table *ind_tbl = NULL; 1284 bool has_sq = true; 1285 struct ib_device *ib_dev; 1286 1287 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW)) 1288 return -EPERM; 1289 1290 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1291 &ib_dev); 1292 if (IS_ERR(obj)) 1293 return PTR_ERR(obj); 1294 obj->uxrcd = NULL; 1295 obj->uevent.uobject.user_handle = cmd->user_handle; 1296 mutex_init(&obj->mcast_lock); 1297 1298 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1299 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1300 UVERBS_OBJECT_RWQ_IND_TBL, 1301 cmd->rwq_ind_tbl_handle, attrs); 1302 if (!ind_tbl) { 1303 ret = -EINVAL; 1304 goto err_put; 1305 } 1306 1307 attr.rwq_ind_tbl = ind_tbl; 1308 } 1309 1310 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1311 ret = -EINVAL; 1312 goto err_put; 1313 } 1314 1315 if (ind_tbl && !cmd->max_send_wr) 1316 has_sq = false; 1317 1318 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1319 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1320 attrs); 1321 1322 if (IS_ERR(xrcd_uobj)) { 1323 ret = -EINVAL; 1324 goto err_put; 1325 } 1326 1327 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1328 if (!xrcd) { 1329 ret = -EINVAL; 1330 goto err_put; 1331 } 1332 device = xrcd->device; 1333 } else { 1334 if (cmd->qp_type == IB_QPT_XRC_INI) { 1335 cmd->max_recv_wr = 0; 1336 cmd->max_recv_sge = 0; 1337 } else { 1338 if (cmd->is_srq) { 1339 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1340 cmd->srq_handle, attrs); 1341 if (!srq || srq->srq_type == IB_SRQT_XRC) { 1342 ret = -EINVAL; 1343 goto err_put; 1344 } 1345 } 1346 1347 if (!ind_tbl) { 1348 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1349 rcq = uobj_get_obj_read( 1350 cq, UVERBS_OBJECT_CQ, 1351 cmd->recv_cq_handle, attrs); 1352 if (!rcq) { 1353 ret = -EINVAL; 1354 goto err_put; 1355 } 1356 } 1357 } 1358 } 1359 1360 if (has_sq) 1361 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1362 cmd->send_cq_handle, attrs); 1363 if (!ind_tbl) 1364 rcq = rcq ?: scq; 1365 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1366 attrs); 1367 if (!pd || (!scq && has_sq)) { 1368 ret = -EINVAL; 1369 goto err_put; 1370 } 1371 1372 device = pd->device; 1373 } 1374 1375 attr.event_handler = ib_uverbs_qp_event_handler; 1376 attr.qp_context = attrs->ufile; 1377 attr.send_cq = scq; 1378 attr.recv_cq = rcq; 1379 attr.srq = srq; 1380 attr.xrcd = xrcd; 1381 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1382 IB_SIGNAL_REQ_WR; 1383 attr.qp_type = cmd->qp_type; 1384 attr.create_flags = 0; 1385 1386 attr.cap.max_send_wr = cmd->max_send_wr; 1387 attr.cap.max_recv_wr = cmd->max_recv_wr; 1388 attr.cap.max_send_sge = cmd->max_send_sge; 1389 attr.cap.max_recv_sge = cmd->max_recv_sge; 1390 attr.cap.max_inline_data = cmd->max_inline_data; 1391 1392 obj->uevent.events_reported = 0; 1393 INIT_LIST_HEAD(&obj->uevent.event_list); 1394 INIT_LIST_HEAD(&obj->mcast_list); 1395 1396 attr.create_flags = cmd->create_flags; 1397 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1398 IB_QP_CREATE_CROSS_CHANNEL | 1399 IB_QP_CREATE_MANAGED_SEND | 1400 IB_QP_CREATE_MANAGED_RECV | 1401 IB_QP_CREATE_SCATTER_FCS | 1402 IB_QP_CREATE_CVLAN_STRIPPING | 1403 IB_QP_CREATE_SOURCE_QPN | 1404 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1405 ret = -EINVAL; 1406 goto err_put; 1407 } 1408 1409 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1410 if (!capable(CAP_NET_RAW)) { 1411 ret = -EPERM; 1412 goto err_put; 1413 } 1414 1415 attr.source_qpn = cmd->source_qpn; 1416 } 1417 1418 if (cmd->qp_type == IB_QPT_XRC_TGT) 1419 qp = ib_create_qp(pd, &attr); 1420 else 1421 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata, 1422 &obj->uevent.uobject); 1423 1424 if (IS_ERR(qp)) { 1425 ret = PTR_ERR(qp); 1426 goto err_put; 1427 } 1428 1429 if (cmd->qp_type != IB_QPT_XRC_TGT) { 1430 ret = ib_create_qp_security(qp, device); 1431 if (ret) 1432 goto err_cb; 1433 1434 qp->pd = pd; 1435 qp->send_cq = attr.send_cq; 1436 qp->recv_cq = attr.recv_cq; 1437 qp->srq = attr.srq; 1438 qp->rwq_ind_tbl = ind_tbl; 1439 qp->event_handler = attr.event_handler; 1440 qp->qp_context = attr.qp_context; 1441 qp->qp_type = attr.qp_type; 1442 atomic_set(&qp->usecnt, 0); 1443 atomic_inc(&pd->usecnt); 1444 qp->port = 0; 1445 if (attr.send_cq) 1446 atomic_inc(&attr.send_cq->usecnt); 1447 if (attr.recv_cq) 1448 atomic_inc(&attr.recv_cq->usecnt); 1449 if (attr.srq) 1450 atomic_inc(&attr.srq->usecnt); 1451 if (ind_tbl) 1452 atomic_inc(&ind_tbl->usecnt); 1453 } else { 1454 /* It is done in _ib_create_qp for other QP types */ 1455 qp->uobject = &obj->uevent.uobject; 1456 } 1457 1458 obj->uevent.uobject.object = qp; 1459 1460 memset(&resp, 0, sizeof resp); 1461 resp.base.qpn = qp->qp_num; 1462 resp.base.qp_handle = obj->uevent.uobject.id; 1463 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1464 resp.base.max_send_sge = attr.cap.max_send_sge; 1465 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1466 resp.base.max_send_wr = attr.cap.max_send_wr; 1467 resp.base.max_inline_data = attr.cap.max_inline_data; 1468 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1469 1470 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1471 if (ret) 1472 goto err_cb; 1473 1474 if (xrcd) { 1475 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1476 uobject); 1477 atomic_inc(&obj->uxrcd->refcnt); 1478 uobj_put_read(xrcd_uobj); 1479 } 1480 1481 if (pd) 1482 uobj_put_obj_read(pd); 1483 if (scq) 1484 uobj_put_obj_read(scq); 1485 if (rcq && rcq != scq) 1486 uobj_put_obj_read(rcq); 1487 if (srq) 1488 uobj_put_obj_read(srq); 1489 if (ind_tbl) 1490 uobj_put_obj_read(ind_tbl); 1491 1492 return uobj_alloc_commit(&obj->uevent.uobject, attrs); 1493 err_cb: 1494 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs)); 1495 1496 err_put: 1497 if (!IS_ERR(xrcd_uobj)) 1498 uobj_put_read(xrcd_uobj); 1499 if (pd) 1500 uobj_put_obj_read(pd); 1501 if (scq) 1502 uobj_put_obj_read(scq); 1503 if (rcq && rcq != scq) 1504 uobj_put_obj_read(rcq); 1505 if (srq) 1506 uobj_put_obj_read(srq); 1507 if (ind_tbl) 1508 uobj_put_obj_read(ind_tbl); 1509 1510 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1511 return ret; 1512 } 1513 1514 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1515 { 1516 struct ib_uverbs_create_qp cmd; 1517 struct ib_uverbs_ex_create_qp cmd_ex; 1518 int ret; 1519 1520 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1521 if (ret) 1522 return ret; 1523 1524 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1525 cmd_ex.user_handle = cmd.user_handle; 1526 cmd_ex.pd_handle = cmd.pd_handle; 1527 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1528 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1529 cmd_ex.srq_handle = cmd.srq_handle; 1530 cmd_ex.max_send_wr = cmd.max_send_wr; 1531 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1532 cmd_ex.max_send_sge = cmd.max_send_sge; 1533 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1534 cmd_ex.max_inline_data = cmd.max_inline_data; 1535 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1536 cmd_ex.qp_type = cmd.qp_type; 1537 cmd_ex.is_srq = cmd.is_srq; 1538 1539 return create_qp(attrs, &cmd_ex); 1540 } 1541 1542 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1543 { 1544 struct ib_uverbs_ex_create_qp cmd; 1545 int ret; 1546 1547 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1548 if (ret) 1549 return ret; 1550 1551 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1552 return -EINVAL; 1553 1554 if (cmd.reserved) 1555 return -EINVAL; 1556 1557 return create_qp(attrs, &cmd); 1558 } 1559 1560 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1561 { 1562 struct ib_uverbs_open_qp cmd; 1563 struct ib_uverbs_create_qp_resp resp; 1564 struct ib_uqp_object *obj; 1565 struct ib_xrcd *xrcd; 1566 struct ib_uobject *uninitialized_var(xrcd_uobj); 1567 struct ib_qp *qp; 1568 struct ib_qp_open_attr attr; 1569 int ret; 1570 struct ib_device *ib_dev; 1571 1572 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1573 if (ret) 1574 return ret; 1575 1576 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1577 &ib_dev); 1578 if (IS_ERR(obj)) 1579 return PTR_ERR(obj); 1580 1581 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1582 if (IS_ERR(xrcd_uobj)) { 1583 ret = -EINVAL; 1584 goto err_put; 1585 } 1586 1587 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1588 if (!xrcd) { 1589 ret = -EINVAL; 1590 goto err_xrcd; 1591 } 1592 1593 attr.event_handler = ib_uverbs_qp_event_handler; 1594 attr.qp_context = attrs->ufile; 1595 attr.qp_num = cmd.qpn; 1596 attr.qp_type = cmd.qp_type; 1597 1598 obj->uevent.events_reported = 0; 1599 INIT_LIST_HEAD(&obj->uevent.event_list); 1600 INIT_LIST_HEAD(&obj->mcast_list); 1601 1602 qp = ib_open_qp(xrcd, &attr); 1603 if (IS_ERR(qp)) { 1604 ret = PTR_ERR(qp); 1605 goto err_xrcd; 1606 } 1607 1608 obj->uevent.uobject.object = qp; 1609 obj->uevent.uobject.user_handle = cmd.user_handle; 1610 1611 memset(&resp, 0, sizeof resp); 1612 resp.qpn = qp->qp_num; 1613 resp.qp_handle = obj->uevent.uobject.id; 1614 1615 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1616 if (ret) 1617 goto err_destroy; 1618 1619 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1620 atomic_inc(&obj->uxrcd->refcnt); 1621 qp->uobject = &obj->uevent.uobject; 1622 uobj_put_read(xrcd_uobj); 1623 1624 return uobj_alloc_commit(&obj->uevent.uobject, attrs); 1625 1626 err_destroy: 1627 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs)); 1628 err_xrcd: 1629 uobj_put_read(xrcd_uobj); 1630 err_put: 1631 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1632 return ret; 1633 } 1634 1635 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, 1636 struct rdma_ah_attr *rdma_attr) 1637 { 1638 const struct ib_global_route *grh; 1639 1640 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr); 1641 uverb_attr->sl = rdma_ah_get_sl(rdma_attr); 1642 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr); 1643 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr); 1644 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) & 1645 IB_AH_GRH); 1646 if (uverb_attr->is_global) { 1647 grh = rdma_ah_read_grh(rdma_attr); 1648 memcpy(uverb_attr->dgid, grh->dgid.raw, 16); 1649 uverb_attr->flow_label = grh->flow_label; 1650 uverb_attr->sgid_index = grh->sgid_index; 1651 uverb_attr->hop_limit = grh->hop_limit; 1652 uverb_attr->traffic_class = grh->traffic_class; 1653 } 1654 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr); 1655 } 1656 1657 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) 1658 { 1659 struct ib_uverbs_query_qp cmd; 1660 struct ib_uverbs_query_qp_resp resp; 1661 struct ib_qp *qp; 1662 struct ib_qp_attr *attr; 1663 struct ib_qp_init_attr *init_attr; 1664 int ret; 1665 1666 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1667 if (ret) 1668 return ret; 1669 1670 attr = kmalloc(sizeof *attr, GFP_KERNEL); 1671 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 1672 if (!attr || !init_attr) { 1673 ret = -ENOMEM; 1674 goto out; 1675 } 1676 1677 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1678 if (!qp) { 1679 ret = -EINVAL; 1680 goto out; 1681 } 1682 1683 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1684 1685 uobj_put_obj_read(qp); 1686 1687 if (ret) 1688 goto out; 1689 1690 memset(&resp, 0, sizeof resp); 1691 1692 resp.qp_state = attr->qp_state; 1693 resp.cur_qp_state = attr->cur_qp_state; 1694 resp.path_mtu = attr->path_mtu; 1695 resp.path_mig_state = attr->path_mig_state; 1696 resp.qkey = attr->qkey; 1697 resp.rq_psn = attr->rq_psn; 1698 resp.sq_psn = attr->sq_psn; 1699 resp.dest_qp_num = attr->dest_qp_num; 1700 resp.qp_access_flags = attr->qp_access_flags; 1701 resp.pkey_index = attr->pkey_index; 1702 resp.alt_pkey_index = attr->alt_pkey_index; 1703 resp.sq_draining = attr->sq_draining; 1704 resp.max_rd_atomic = attr->max_rd_atomic; 1705 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1706 resp.min_rnr_timer = attr->min_rnr_timer; 1707 resp.port_num = attr->port_num; 1708 resp.timeout = attr->timeout; 1709 resp.retry_cnt = attr->retry_cnt; 1710 resp.rnr_retry = attr->rnr_retry; 1711 resp.alt_port_num = attr->alt_port_num; 1712 resp.alt_timeout = attr->alt_timeout; 1713 1714 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1715 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1716 1717 resp.max_send_wr = init_attr->cap.max_send_wr; 1718 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1719 resp.max_send_sge = init_attr->cap.max_send_sge; 1720 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1721 resp.max_inline_data = init_attr->cap.max_inline_data; 1722 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1723 1724 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1725 1726 out: 1727 kfree(attr); 1728 kfree(init_attr); 1729 1730 return ret; 1731 } 1732 1733 /* Remove ignored fields set in the attribute mask */ 1734 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1735 { 1736 switch (qp_type) { 1737 case IB_QPT_XRC_INI: 1738 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1739 case IB_QPT_XRC_TGT: 1740 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1741 IB_QP_RNR_RETRY); 1742 default: 1743 return mask; 1744 } 1745 } 1746 1747 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1748 struct rdma_ah_attr *rdma_attr, 1749 struct ib_uverbs_qp_dest *uverb_attr) 1750 { 1751 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); 1752 if (uverb_attr->is_global) { 1753 rdma_ah_set_grh(rdma_attr, NULL, 1754 uverb_attr->flow_label, 1755 uverb_attr->sgid_index, 1756 uverb_attr->hop_limit, 1757 uverb_attr->traffic_class); 1758 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); 1759 } else { 1760 rdma_ah_set_ah_flags(rdma_attr, 0); 1761 } 1762 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); 1763 rdma_ah_set_sl(rdma_attr, uverb_attr->sl); 1764 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); 1765 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); 1766 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); 1767 rdma_ah_set_make_grd(rdma_attr, false); 1768 } 1769 1770 static int modify_qp(struct uverbs_attr_bundle *attrs, 1771 struct ib_uverbs_ex_modify_qp *cmd) 1772 { 1773 struct ib_qp_attr *attr; 1774 struct ib_qp *qp; 1775 int ret; 1776 1777 attr = kzalloc(sizeof(*attr), GFP_KERNEL); 1778 if (!attr) 1779 return -ENOMEM; 1780 1781 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1782 attrs); 1783 if (!qp) { 1784 ret = -EINVAL; 1785 goto out; 1786 } 1787 1788 if ((cmd->base.attr_mask & IB_QP_PORT) && 1789 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1790 ret = -EINVAL; 1791 goto release_qp; 1792 } 1793 1794 if ((cmd->base.attr_mask & IB_QP_AV)) { 1795 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1796 ret = -EINVAL; 1797 goto release_qp; 1798 } 1799 1800 if (cmd->base.attr_mask & IB_QP_STATE && 1801 cmd->base.qp_state == IB_QPS_RTR) { 1802 /* We are in INIT->RTR TRANSITION (if we are not, 1803 * this transition will be rejected in subsequent checks). 1804 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1805 * but the IB_QP_STATE flag is required. 1806 * 1807 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1808 * when IB_QP_AV is set, has required inclusion of a valid 1809 * port number in the primary AV. (AVs are created and handled 1810 * differently for infiniband and ethernet (RoCE) ports). 1811 * 1812 * Check the port number included in the primary AV against 1813 * the port number in the qp struct, which was set (and saved) 1814 * in the RST->INIT transition. 1815 */ 1816 if (cmd->base.dest.port_num != qp->real_qp->port) { 1817 ret = -EINVAL; 1818 goto release_qp; 1819 } 1820 } else { 1821 /* We are in SQD->SQD. (If we are not, this transition will 1822 * be rejected later in the verbs layer checks). 1823 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1824 * together in the SQD->SQD transition. 1825 * 1826 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1827 * verbs layer driver does not track primary port changes 1828 * resulting from path migration. Thus, in SQD, if the primary 1829 * AV is modified, the primary port should also be modified). 1830 * 1831 * Note that in this transition, the IB_QP_STATE flag 1832 * is not allowed. 1833 */ 1834 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1835 == (IB_QP_AV | IB_QP_PORT)) && 1836 cmd->base.port_num != cmd->base.dest.port_num) { 1837 ret = -EINVAL; 1838 goto release_qp; 1839 } 1840 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1841 == IB_QP_AV) { 1842 cmd->base.attr_mask |= IB_QP_PORT; 1843 cmd->base.port_num = cmd->base.dest.port_num; 1844 } 1845 } 1846 } 1847 1848 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1849 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1850 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1851 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1852 ret = -EINVAL; 1853 goto release_qp; 1854 } 1855 1856 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1857 cmd->base.cur_qp_state > IB_QPS_ERR) || 1858 (cmd->base.attr_mask & IB_QP_STATE && 1859 cmd->base.qp_state > IB_QPS_ERR)) { 1860 ret = -EINVAL; 1861 goto release_qp; 1862 } 1863 1864 if (cmd->base.attr_mask & IB_QP_STATE) 1865 attr->qp_state = cmd->base.qp_state; 1866 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1867 attr->cur_qp_state = cmd->base.cur_qp_state; 1868 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1869 attr->path_mtu = cmd->base.path_mtu; 1870 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1871 attr->path_mig_state = cmd->base.path_mig_state; 1872 if (cmd->base.attr_mask & IB_QP_QKEY) 1873 attr->qkey = cmd->base.qkey; 1874 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1875 attr->rq_psn = cmd->base.rq_psn; 1876 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1877 attr->sq_psn = cmd->base.sq_psn; 1878 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1879 attr->dest_qp_num = cmd->base.dest_qp_num; 1880 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1881 attr->qp_access_flags = cmd->base.qp_access_flags; 1882 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1883 attr->pkey_index = cmd->base.pkey_index; 1884 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1885 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1886 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1887 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1888 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1889 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1890 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1891 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1892 if (cmd->base.attr_mask & IB_QP_PORT) 1893 attr->port_num = cmd->base.port_num; 1894 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1895 attr->timeout = cmd->base.timeout; 1896 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1897 attr->retry_cnt = cmd->base.retry_cnt; 1898 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1899 attr->rnr_retry = cmd->base.rnr_retry; 1900 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1901 attr->alt_port_num = cmd->base.alt_port_num; 1902 attr->alt_timeout = cmd->base.alt_timeout; 1903 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1904 } 1905 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1906 attr->rate_limit = cmd->rate_limit; 1907 1908 if (cmd->base.attr_mask & IB_QP_AV) 1909 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1910 &cmd->base.dest); 1911 1912 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1913 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1914 &cmd->base.alt_dest); 1915 1916 ret = ib_modify_qp_with_udata(qp, attr, 1917 modify_qp_mask(qp->qp_type, 1918 cmd->base.attr_mask), 1919 &attrs->driver_udata); 1920 1921 release_qp: 1922 uobj_put_obj_read(qp); 1923 out: 1924 kfree(attr); 1925 1926 return ret; 1927 } 1928 1929 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1930 { 1931 struct ib_uverbs_ex_modify_qp cmd; 1932 int ret; 1933 1934 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1935 if (ret) 1936 return ret; 1937 1938 if (cmd.base.attr_mask & 1939 ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1)) 1940 return -EOPNOTSUPP; 1941 1942 return modify_qp(attrs, &cmd); 1943 } 1944 1945 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1946 { 1947 struct ib_uverbs_ex_modify_qp cmd; 1948 struct ib_uverbs_ex_modify_qp_resp resp = { 1949 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1950 }; 1951 int ret; 1952 1953 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1954 if (ret) 1955 return ret; 1956 1957 /* 1958 * Last bit is reserved for extending the attr_mask by 1959 * using another field. 1960 */ 1961 BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31)); 1962 1963 if (cmd.base.attr_mask & 1964 ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1)) 1965 return -EOPNOTSUPP; 1966 1967 ret = modify_qp(attrs, &cmd); 1968 if (ret) 1969 return ret; 1970 1971 return uverbs_response(attrs, &resp, sizeof(resp)); 1972 } 1973 1974 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1975 { 1976 struct ib_uverbs_destroy_qp cmd; 1977 struct ib_uverbs_destroy_qp_resp resp; 1978 struct ib_uobject *uobj; 1979 struct ib_uqp_object *obj; 1980 int ret; 1981 1982 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1983 if (ret) 1984 return ret; 1985 1986 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1987 if (IS_ERR(uobj)) 1988 return PTR_ERR(uobj); 1989 1990 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1991 memset(&resp, 0, sizeof(resp)); 1992 resp.events_reported = obj->uevent.events_reported; 1993 1994 uobj_put_destroy(uobj); 1995 1996 return uverbs_response(attrs, &resp, sizeof(resp)); 1997 } 1998 1999 static void *alloc_wr(size_t wr_size, __u32 num_sge) 2000 { 2001 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) / 2002 sizeof (struct ib_sge)) 2003 return NULL; 2004 2005 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) + 2006 num_sge * sizeof (struct ib_sge), GFP_KERNEL); 2007 } 2008 2009 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 2010 { 2011 struct ib_uverbs_post_send cmd; 2012 struct ib_uverbs_post_send_resp resp; 2013 struct ib_uverbs_send_wr *user_wr; 2014 struct ib_send_wr *wr = NULL, *last, *next; 2015 const struct ib_send_wr *bad_wr; 2016 struct ib_qp *qp; 2017 int i, sg_ind; 2018 int is_ud; 2019 int ret, ret2; 2020 size_t next_size; 2021 const struct ib_sge __user *sgls; 2022 const void __user *wqes; 2023 struct uverbs_req_iter iter; 2024 2025 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2026 if (ret) 2027 return ret; 2028 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count); 2029 if (IS_ERR(wqes)) 2030 return PTR_ERR(wqes); 2031 sgls = uverbs_request_next_ptr( 2032 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge)); 2033 if (IS_ERR(sgls)) 2034 return PTR_ERR(sgls); 2035 ret = uverbs_request_finish(&iter); 2036 if (ret) 2037 return ret; 2038 2039 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2040 if (!user_wr) 2041 return -ENOMEM; 2042 2043 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2044 if (!qp) { 2045 ret = -EINVAL; 2046 goto out; 2047 } 2048 2049 is_ud = qp->qp_type == IB_QPT_UD; 2050 sg_ind = 0; 2051 last = NULL; 2052 for (i = 0; i < cmd.wr_count; ++i) { 2053 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2054 cmd.wqe_size)) { 2055 ret = -EFAULT; 2056 goto out_put; 2057 } 2058 2059 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2060 ret = -EINVAL; 2061 goto out_put; 2062 } 2063 2064 if (is_ud) { 2065 struct ib_ud_wr *ud; 2066 2067 if (user_wr->opcode != IB_WR_SEND && 2068 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2069 ret = -EINVAL; 2070 goto out_put; 2071 } 2072 2073 next_size = sizeof(*ud); 2074 ud = alloc_wr(next_size, user_wr->num_sge); 2075 if (!ud) { 2076 ret = -ENOMEM; 2077 goto out_put; 2078 } 2079 2080 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2081 user_wr->wr.ud.ah, attrs); 2082 if (!ud->ah) { 2083 kfree(ud); 2084 ret = -EINVAL; 2085 goto out_put; 2086 } 2087 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2088 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2089 2090 next = &ud->wr; 2091 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2092 user_wr->opcode == IB_WR_RDMA_WRITE || 2093 user_wr->opcode == IB_WR_RDMA_READ) { 2094 struct ib_rdma_wr *rdma; 2095 2096 next_size = sizeof(*rdma); 2097 rdma = alloc_wr(next_size, user_wr->num_sge); 2098 if (!rdma) { 2099 ret = -ENOMEM; 2100 goto out_put; 2101 } 2102 2103 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2104 rdma->rkey = user_wr->wr.rdma.rkey; 2105 2106 next = &rdma->wr; 2107 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2108 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2109 struct ib_atomic_wr *atomic; 2110 2111 next_size = sizeof(*atomic); 2112 atomic = alloc_wr(next_size, user_wr->num_sge); 2113 if (!atomic) { 2114 ret = -ENOMEM; 2115 goto out_put; 2116 } 2117 2118 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2119 atomic->compare_add = user_wr->wr.atomic.compare_add; 2120 atomic->swap = user_wr->wr.atomic.swap; 2121 atomic->rkey = user_wr->wr.atomic.rkey; 2122 2123 next = &atomic->wr; 2124 } else if (user_wr->opcode == IB_WR_SEND || 2125 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2126 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2127 next_size = sizeof(*next); 2128 next = alloc_wr(next_size, user_wr->num_sge); 2129 if (!next) { 2130 ret = -ENOMEM; 2131 goto out_put; 2132 } 2133 } else { 2134 ret = -EINVAL; 2135 goto out_put; 2136 } 2137 2138 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2139 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2140 next->ex.imm_data = 2141 (__be32 __force) user_wr->ex.imm_data; 2142 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2143 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2144 } 2145 2146 if (!last) 2147 wr = next; 2148 else 2149 last->next = next; 2150 last = next; 2151 2152 next->next = NULL; 2153 next->wr_id = user_wr->wr_id; 2154 next->num_sge = user_wr->num_sge; 2155 next->opcode = user_wr->opcode; 2156 next->send_flags = user_wr->send_flags; 2157 2158 if (next->num_sge) { 2159 next->sg_list = (void *) next + 2160 ALIGN(next_size, sizeof(struct ib_sge)); 2161 if (copy_from_user(next->sg_list, sgls + sg_ind, 2162 next->num_sge * 2163 sizeof(struct ib_sge))) { 2164 ret = -EFAULT; 2165 goto out_put; 2166 } 2167 sg_ind += next->num_sge; 2168 } else 2169 next->sg_list = NULL; 2170 } 2171 2172 resp.bad_wr = 0; 2173 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2174 if (ret) 2175 for (next = wr; next; next = next->next) { 2176 ++resp.bad_wr; 2177 if (next == bad_wr) 2178 break; 2179 } 2180 2181 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2182 if (ret2) 2183 ret = ret2; 2184 2185 out_put: 2186 uobj_put_obj_read(qp); 2187 2188 while (wr) { 2189 if (is_ud && ud_wr(wr)->ah) 2190 uobj_put_obj_read(ud_wr(wr)->ah); 2191 next = wr->next; 2192 kfree(wr); 2193 wr = next; 2194 } 2195 2196 out: 2197 kfree(user_wr); 2198 2199 return ret; 2200 } 2201 2202 static struct ib_recv_wr * 2203 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2204 u32 wqe_size, u32 sge_count) 2205 { 2206 struct ib_uverbs_recv_wr *user_wr; 2207 struct ib_recv_wr *wr = NULL, *last, *next; 2208 int sg_ind; 2209 int i; 2210 int ret; 2211 const struct ib_sge __user *sgls; 2212 const void __user *wqes; 2213 2214 if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) 2215 return ERR_PTR(-EINVAL); 2216 2217 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count); 2218 if (IS_ERR(wqes)) 2219 return ERR_CAST(wqes); 2220 sgls = uverbs_request_next_ptr( 2221 iter, sge_count * sizeof(struct ib_uverbs_sge)); 2222 if (IS_ERR(sgls)) 2223 return ERR_CAST(sgls); 2224 ret = uverbs_request_finish(iter); 2225 if (ret) 2226 return ERR_PTR(ret); 2227 2228 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2229 if (!user_wr) 2230 return ERR_PTR(-ENOMEM); 2231 2232 sg_ind = 0; 2233 last = NULL; 2234 for (i = 0; i < wr_count; ++i) { 2235 if (copy_from_user(user_wr, wqes + i * wqe_size, 2236 wqe_size)) { 2237 ret = -EFAULT; 2238 goto err; 2239 } 2240 2241 if (user_wr->num_sge + sg_ind > sge_count) { 2242 ret = -EINVAL; 2243 goto err; 2244 } 2245 2246 if (user_wr->num_sge >= 2247 (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) / 2248 sizeof (struct ib_sge)) { 2249 ret = -EINVAL; 2250 goto err; 2251 } 2252 2253 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + 2254 user_wr->num_sge * sizeof (struct ib_sge), 2255 GFP_KERNEL); 2256 if (!next) { 2257 ret = -ENOMEM; 2258 goto err; 2259 } 2260 2261 if (!last) 2262 wr = next; 2263 else 2264 last->next = next; 2265 last = next; 2266 2267 next->next = NULL; 2268 next->wr_id = user_wr->wr_id; 2269 next->num_sge = user_wr->num_sge; 2270 2271 if (next->num_sge) { 2272 next->sg_list = (void *) next + 2273 ALIGN(sizeof *next, sizeof (struct ib_sge)); 2274 if (copy_from_user(next->sg_list, sgls + sg_ind, 2275 next->num_sge * 2276 sizeof(struct ib_sge))) { 2277 ret = -EFAULT; 2278 goto err; 2279 } 2280 sg_ind += next->num_sge; 2281 } else 2282 next->sg_list = NULL; 2283 } 2284 2285 kfree(user_wr); 2286 return wr; 2287 2288 err: 2289 kfree(user_wr); 2290 2291 while (wr) { 2292 next = wr->next; 2293 kfree(wr); 2294 wr = next; 2295 } 2296 2297 return ERR_PTR(ret); 2298 } 2299 2300 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2301 { 2302 struct ib_uverbs_post_recv cmd; 2303 struct ib_uverbs_post_recv_resp resp; 2304 struct ib_recv_wr *wr, *next; 2305 const struct ib_recv_wr *bad_wr; 2306 struct ib_qp *qp; 2307 int ret, ret2; 2308 struct uverbs_req_iter iter; 2309 2310 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2311 if (ret) 2312 return ret; 2313 2314 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2315 cmd.sge_count); 2316 if (IS_ERR(wr)) 2317 return PTR_ERR(wr); 2318 2319 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2320 if (!qp) { 2321 ret = -EINVAL; 2322 goto out; 2323 } 2324 2325 resp.bad_wr = 0; 2326 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2327 2328 uobj_put_obj_read(qp); 2329 if (ret) { 2330 for (next = wr; next; next = next->next) { 2331 ++resp.bad_wr; 2332 if (next == bad_wr) 2333 break; 2334 } 2335 } 2336 2337 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2338 if (ret2) 2339 ret = ret2; 2340 out: 2341 while (wr) { 2342 next = wr->next; 2343 kfree(wr); 2344 wr = next; 2345 } 2346 2347 return ret; 2348 } 2349 2350 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2351 { 2352 struct ib_uverbs_post_srq_recv cmd; 2353 struct ib_uverbs_post_srq_recv_resp resp; 2354 struct ib_recv_wr *wr, *next; 2355 const struct ib_recv_wr *bad_wr; 2356 struct ib_srq *srq; 2357 int ret, ret2; 2358 struct uverbs_req_iter iter; 2359 2360 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2361 if (ret) 2362 return ret; 2363 2364 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2365 cmd.sge_count); 2366 if (IS_ERR(wr)) 2367 return PTR_ERR(wr); 2368 2369 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2370 if (!srq) { 2371 ret = -EINVAL; 2372 goto out; 2373 } 2374 2375 resp.bad_wr = 0; 2376 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2377 2378 uobj_put_obj_read(srq); 2379 2380 if (ret) 2381 for (next = wr; next; next = next->next) { 2382 ++resp.bad_wr; 2383 if (next == bad_wr) 2384 break; 2385 } 2386 2387 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2388 if (ret2) 2389 ret = ret2; 2390 2391 out: 2392 while (wr) { 2393 next = wr->next; 2394 kfree(wr); 2395 wr = next; 2396 } 2397 2398 return ret; 2399 } 2400 2401 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2402 { 2403 struct ib_uverbs_create_ah cmd; 2404 struct ib_uverbs_create_ah_resp resp; 2405 struct ib_uobject *uobj; 2406 struct ib_pd *pd; 2407 struct ib_ah *ah; 2408 struct rdma_ah_attr attr = {}; 2409 int ret; 2410 struct ib_device *ib_dev; 2411 2412 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2413 if (ret) 2414 return ret; 2415 2416 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2417 if (IS_ERR(uobj)) 2418 return PTR_ERR(uobj); 2419 2420 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2421 ret = -EINVAL; 2422 goto err; 2423 } 2424 2425 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2426 if (!pd) { 2427 ret = -EINVAL; 2428 goto err; 2429 } 2430 2431 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2432 rdma_ah_set_make_grd(&attr, false); 2433 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2434 rdma_ah_set_sl(&attr, cmd.attr.sl); 2435 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2436 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2437 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2438 2439 if (cmd.attr.is_global) { 2440 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2441 cmd.attr.grh.sgid_index, 2442 cmd.attr.grh.hop_limit, 2443 cmd.attr.grh.traffic_class); 2444 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2445 } else { 2446 rdma_ah_set_ah_flags(&attr, 0); 2447 } 2448 2449 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2450 if (IS_ERR(ah)) { 2451 ret = PTR_ERR(ah); 2452 goto err_put; 2453 } 2454 2455 ah->uobject = uobj; 2456 uobj->user_handle = cmd.user_handle; 2457 uobj->object = ah; 2458 2459 resp.ah_handle = uobj->id; 2460 2461 ret = uverbs_response(attrs, &resp, sizeof(resp)); 2462 if (ret) 2463 goto err_copy; 2464 2465 uobj_put_obj_read(pd); 2466 return uobj_alloc_commit(uobj, attrs); 2467 2468 err_copy: 2469 rdma_destroy_ah_user(ah, RDMA_DESTROY_AH_SLEEPABLE, 2470 uverbs_get_cleared_udata(attrs)); 2471 2472 err_put: 2473 uobj_put_obj_read(pd); 2474 2475 err: 2476 uobj_alloc_abort(uobj, attrs); 2477 return ret; 2478 } 2479 2480 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2481 { 2482 struct ib_uverbs_destroy_ah cmd; 2483 int ret; 2484 2485 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2486 if (ret) 2487 return ret; 2488 2489 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2490 } 2491 2492 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2493 { 2494 struct ib_uverbs_attach_mcast cmd; 2495 struct ib_qp *qp; 2496 struct ib_uqp_object *obj; 2497 struct ib_uverbs_mcast_entry *mcast; 2498 int ret; 2499 2500 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2501 if (ret) 2502 return ret; 2503 2504 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2505 if (!qp) 2506 return -EINVAL; 2507 2508 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); 2509 2510 mutex_lock(&obj->mcast_lock); 2511 list_for_each_entry(mcast, &obj->mcast_list, list) 2512 if (cmd.mlid == mcast->lid && 2513 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2514 ret = 0; 2515 goto out_put; 2516 } 2517 2518 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2519 if (!mcast) { 2520 ret = -ENOMEM; 2521 goto out_put; 2522 } 2523 2524 mcast->lid = cmd.mlid; 2525 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2526 2527 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2528 if (!ret) 2529 list_add_tail(&mcast->list, &obj->mcast_list); 2530 else 2531 kfree(mcast); 2532 2533 out_put: 2534 mutex_unlock(&obj->mcast_lock); 2535 uobj_put_obj_read(qp); 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 = container_of(qp->uobject, struct ib_uqp_object, uevent.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 uobj_put_obj_read(qp); 2579 return ret; 2580 } 2581 2582 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2583 { 2584 struct ib_uflow_resources *resources; 2585 2586 resources = kzalloc(sizeof(*resources), GFP_KERNEL); 2587 2588 if (!resources) 2589 return NULL; 2590 2591 if (!num_specs) 2592 goto out; 2593 2594 resources->counters = 2595 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); 2596 resources->collection = 2597 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); 2598 2599 if (!resources->counters || !resources->collection) 2600 goto err; 2601 2602 out: 2603 resources->max = num_specs; 2604 return resources; 2605 2606 err: 2607 kfree(resources->counters); 2608 kfree(resources); 2609 2610 return NULL; 2611 } 2612 EXPORT_SYMBOL(flow_resources_alloc); 2613 2614 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2615 { 2616 unsigned int i; 2617 2618 if (!uflow_res) 2619 return; 2620 2621 for (i = 0; i < uflow_res->collection_num; i++) 2622 atomic_dec(&uflow_res->collection[i]->usecnt); 2623 2624 for (i = 0; i < uflow_res->counters_num; i++) 2625 atomic_dec(&uflow_res->counters[i]->usecnt); 2626 2627 kfree(uflow_res->collection); 2628 kfree(uflow_res->counters); 2629 kfree(uflow_res); 2630 } 2631 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2632 2633 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2634 enum ib_flow_spec_type type, 2635 void *ibobj) 2636 { 2637 WARN_ON(uflow_res->num >= uflow_res->max); 2638 2639 switch (type) { 2640 case IB_FLOW_SPEC_ACTION_HANDLE: 2641 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2642 uflow_res->collection[uflow_res->collection_num++] = 2643 (struct ib_flow_action *)ibobj; 2644 break; 2645 case IB_FLOW_SPEC_ACTION_COUNT: 2646 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2647 uflow_res->counters[uflow_res->counters_num++] = 2648 (struct ib_counters *)ibobj; 2649 break; 2650 default: 2651 WARN_ON(1); 2652 } 2653 2654 uflow_res->num++; 2655 } 2656 EXPORT_SYMBOL(flow_resources_add); 2657 2658 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2659 struct ib_uverbs_flow_spec *kern_spec, 2660 union ib_flow_spec *ib_spec, 2661 struct ib_uflow_resources *uflow_res) 2662 { 2663 ib_spec->type = kern_spec->type; 2664 switch (ib_spec->type) { 2665 case IB_FLOW_SPEC_ACTION_TAG: 2666 if (kern_spec->flow_tag.size != 2667 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2668 return -EINVAL; 2669 2670 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2671 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2672 break; 2673 case IB_FLOW_SPEC_ACTION_DROP: 2674 if (kern_spec->drop.size != 2675 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2676 return -EINVAL; 2677 2678 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2679 break; 2680 case IB_FLOW_SPEC_ACTION_HANDLE: 2681 if (kern_spec->action.size != 2682 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2683 return -EOPNOTSUPP; 2684 ib_spec->action.act = uobj_get_obj_read(flow_action, 2685 UVERBS_OBJECT_FLOW_ACTION, 2686 kern_spec->action.handle, 2687 attrs); 2688 if (!ib_spec->action.act) 2689 return -EINVAL; 2690 ib_spec->action.size = 2691 sizeof(struct ib_flow_spec_action_handle); 2692 flow_resources_add(uflow_res, 2693 IB_FLOW_SPEC_ACTION_HANDLE, 2694 ib_spec->action.act); 2695 uobj_put_obj_read(ib_spec->action.act); 2696 break; 2697 case IB_FLOW_SPEC_ACTION_COUNT: 2698 if (kern_spec->flow_count.size != 2699 sizeof(struct ib_uverbs_flow_spec_action_count)) 2700 return -EINVAL; 2701 ib_spec->flow_count.counters = 2702 uobj_get_obj_read(counters, 2703 UVERBS_OBJECT_COUNTERS, 2704 kern_spec->flow_count.handle, 2705 attrs); 2706 if (!ib_spec->flow_count.counters) 2707 return -EINVAL; 2708 ib_spec->flow_count.size = 2709 sizeof(struct ib_flow_spec_action_count); 2710 flow_resources_add(uflow_res, 2711 IB_FLOW_SPEC_ACTION_COUNT, 2712 ib_spec->flow_count.counters); 2713 uobj_put_obj_read(ib_spec->flow_count.counters); 2714 break; 2715 default: 2716 return -EINVAL; 2717 } 2718 return 0; 2719 } 2720 2721 static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec) 2722 { 2723 /* Returns user space filter size, includes padding */ 2724 return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2; 2725 } 2726 2727 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2728 u16 ib_real_filter_sz) 2729 { 2730 /* 2731 * User space filter structures must be 64 bit aligned, otherwise this 2732 * may pass, but we won't handle additional new attributes. 2733 */ 2734 2735 if (kern_filter_size > ib_real_filter_sz) { 2736 if (memchr_inv(kern_spec_filter + 2737 ib_real_filter_sz, 0, 2738 kern_filter_size - ib_real_filter_sz)) 2739 return -EINVAL; 2740 return ib_real_filter_sz; 2741 } 2742 return kern_filter_size; 2743 } 2744 2745 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2746 const void *kern_spec_mask, 2747 const void *kern_spec_val, 2748 size_t kern_filter_sz, 2749 union ib_flow_spec *ib_spec) 2750 { 2751 ssize_t actual_filter_sz; 2752 ssize_t ib_filter_sz; 2753 2754 /* User flow spec size must be aligned to 4 bytes */ 2755 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2756 return -EINVAL; 2757 2758 ib_spec->type = type; 2759 2760 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2761 return -EINVAL; 2762 2763 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2764 case IB_FLOW_SPEC_ETH: 2765 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz); 2766 actual_filter_sz = spec_filter_size(kern_spec_mask, 2767 kern_filter_sz, 2768 ib_filter_sz); 2769 if (actual_filter_sz <= 0) 2770 return -EINVAL; 2771 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2772 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2773 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2774 break; 2775 case IB_FLOW_SPEC_IPV4: 2776 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz); 2777 actual_filter_sz = spec_filter_size(kern_spec_mask, 2778 kern_filter_sz, 2779 ib_filter_sz); 2780 if (actual_filter_sz <= 0) 2781 return -EINVAL; 2782 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2783 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2784 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2785 break; 2786 case IB_FLOW_SPEC_IPV6: 2787 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz); 2788 actual_filter_sz = spec_filter_size(kern_spec_mask, 2789 kern_filter_sz, 2790 ib_filter_sz); 2791 if (actual_filter_sz <= 0) 2792 return -EINVAL; 2793 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2794 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2795 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2796 2797 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2798 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2799 return -EINVAL; 2800 break; 2801 case IB_FLOW_SPEC_TCP: 2802 case IB_FLOW_SPEC_UDP: 2803 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz); 2804 actual_filter_sz = spec_filter_size(kern_spec_mask, 2805 kern_filter_sz, 2806 ib_filter_sz); 2807 if (actual_filter_sz <= 0) 2808 return -EINVAL; 2809 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2810 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2811 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2812 break; 2813 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2814 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz); 2815 actual_filter_sz = spec_filter_size(kern_spec_mask, 2816 kern_filter_sz, 2817 ib_filter_sz); 2818 if (actual_filter_sz <= 0) 2819 return -EINVAL; 2820 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2821 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2822 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2823 2824 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2825 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2826 return -EINVAL; 2827 break; 2828 case IB_FLOW_SPEC_ESP: 2829 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz); 2830 actual_filter_sz = spec_filter_size(kern_spec_mask, 2831 kern_filter_sz, 2832 ib_filter_sz); 2833 if (actual_filter_sz <= 0) 2834 return -EINVAL; 2835 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2836 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2837 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2838 break; 2839 case IB_FLOW_SPEC_GRE: 2840 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz); 2841 actual_filter_sz = spec_filter_size(kern_spec_mask, 2842 kern_filter_sz, 2843 ib_filter_sz); 2844 if (actual_filter_sz <= 0) 2845 return -EINVAL; 2846 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2847 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2848 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2849 break; 2850 case IB_FLOW_SPEC_MPLS: 2851 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz); 2852 actual_filter_sz = spec_filter_size(kern_spec_mask, 2853 kern_filter_sz, 2854 ib_filter_sz); 2855 if (actual_filter_sz <= 0) 2856 return -EINVAL; 2857 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2858 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2859 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2860 break; 2861 default: 2862 return -EINVAL; 2863 } 2864 return 0; 2865 } 2866 2867 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2868 union ib_flow_spec *ib_spec) 2869 { 2870 ssize_t kern_filter_sz; 2871 void *kern_spec_mask; 2872 void *kern_spec_val; 2873 2874 kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr); 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_context = attrs->ufile; 2941 wq_init_attr.wq_type = cmd.wq_type; 2942 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2943 wq_init_attr.create_flags = cmd.create_flags; 2944 obj->uevent.events_reported = 0; 2945 INIT_LIST_HEAD(&obj->uevent.event_list); 2946 2947 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2948 if (IS_ERR(wq)) { 2949 err = PTR_ERR(wq); 2950 goto err_put_cq; 2951 } 2952 2953 wq->uobject = &obj->uevent.uobject; 2954 obj->uevent.uobject.object = wq; 2955 wq->wq_type = wq_init_attr.wq_type; 2956 wq->cq = cq; 2957 wq->pd = pd; 2958 wq->device = pd->device; 2959 wq->wq_context = wq_init_attr.wq_context; 2960 atomic_set(&wq->usecnt, 0); 2961 atomic_inc(&pd->usecnt); 2962 atomic_inc(&cq->usecnt); 2963 wq->uobject = &obj->uevent.uobject; 2964 obj->uevent.uobject.object = wq; 2965 2966 memset(&resp, 0, sizeof(resp)); 2967 resp.wq_handle = obj->uevent.uobject.id; 2968 resp.max_sge = wq_init_attr.max_sge; 2969 resp.max_wr = wq_init_attr.max_wr; 2970 resp.wqn = wq->wq_num; 2971 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2972 err = uverbs_response(attrs, &resp, sizeof(resp)); 2973 if (err) 2974 goto err_copy; 2975 2976 uobj_put_obj_read(pd); 2977 uobj_put_obj_read(cq); 2978 return uobj_alloc_commit(&obj->uevent.uobject, attrs); 2979 2980 err_copy: 2981 ib_destroy_wq(wq, uverbs_get_cleared_udata(attrs)); 2982 err_put_cq: 2983 uobj_put_obj_read(cq); 2984 err_put_pd: 2985 uobj_put_obj_read(pd); 2986 err_uobj: 2987 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2988 2989 return err; 2990 } 2991 2992 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2993 { 2994 struct ib_uverbs_ex_destroy_wq cmd; 2995 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 2996 struct ib_uobject *uobj; 2997 struct ib_uwq_object *obj; 2998 int ret; 2999 3000 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3001 if (ret) 3002 return ret; 3003 3004 if (cmd.comp_mask) 3005 return -EOPNOTSUPP; 3006 3007 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3008 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3009 if (IS_ERR(uobj)) 3010 return PTR_ERR(uobj); 3011 3012 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 3013 resp.events_reported = obj->uevent.events_reported; 3014 3015 uobj_put_destroy(uobj); 3016 3017 return uverbs_response(attrs, &resp, sizeof(resp)); 3018 } 3019 3020 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 3021 { 3022 struct ib_uverbs_ex_modify_wq cmd; 3023 struct ib_wq *wq; 3024 struct ib_wq_attr wq_attr = {}; 3025 int ret; 3026 3027 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3028 if (ret) 3029 return ret; 3030 3031 if (!cmd.attr_mask) 3032 return -EINVAL; 3033 3034 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3035 return -EINVAL; 3036 3037 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3038 if (!wq) 3039 return -EINVAL; 3040 3041 wq_attr.curr_wq_state = cmd.curr_wq_state; 3042 wq_attr.wq_state = cmd.wq_state; 3043 if (cmd.attr_mask & IB_WQ_FLAGS) { 3044 wq_attr.flags = cmd.flags; 3045 wq_attr.flags_mask = cmd.flags_mask; 3046 } 3047 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3048 &attrs->driver_udata); 3049 uobj_put_obj_read(wq); 3050 return ret; 3051 } 3052 3053 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3054 { 3055 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3056 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3057 struct ib_uobject *uobj; 3058 int err; 3059 struct ib_rwq_ind_table_init_attr init_attr = {}; 3060 struct ib_rwq_ind_table *rwq_ind_tbl; 3061 struct ib_wq **wqs = NULL; 3062 u32 *wqs_handles = NULL; 3063 struct ib_wq *wq = NULL; 3064 int i, j, num_read_wqs; 3065 u32 num_wq_handles; 3066 struct uverbs_req_iter iter; 3067 struct ib_device *ib_dev; 3068 3069 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3070 if (err) 3071 return err; 3072 3073 if (cmd.comp_mask) 3074 return -EOPNOTSUPP; 3075 3076 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3077 return -EINVAL; 3078 3079 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3080 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3081 GFP_KERNEL); 3082 if (!wqs_handles) 3083 return -ENOMEM; 3084 3085 err = uverbs_request_next(&iter, wqs_handles, 3086 num_wq_handles * sizeof(__u32)); 3087 if (err) 3088 goto err_free; 3089 3090 err = uverbs_request_finish(&iter); 3091 if (err) 3092 goto err_free; 3093 3094 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); 3095 if (!wqs) { 3096 err = -ENOMEM; 3097 goto err_free; 3098 } 3099 3100 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3101 num_read_wqs++) { 3102 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3103 wqs_handles[num_read_wqs], attrs); 3104 if (!wq) { 3105 err = -EINVAL; 3106 goto put_wqs; 3107 } 3108 3109 wqs[num_read_wqs] = wq; 3110 } 3111 3112 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3113 if (IS_ERR(uobj)) { 3114 err = PTR_ERR(uobj); 3115 goto put_wqs; 3116 } 3117 3118 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3119 init_attr.ind_tbl = wqs; 3120 3121 rwq_ind_tbl = ib_dev->ops.create_rwq_ind_table(ib_dev, &init_attr, 3122 &attrs->driver_udata); 3123 3124 if (IS_ERR(rwq_ind_tbl)) { 3125 err = PTR_ERR(rwq_ind_tbl); 3126 goto err_uobj; 3127 } 3128 3129 rwq_ind_tbl->ind_tbl = wqs; 3130 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3131 rwq_ind_tbl->uobject = uobj; 3132 uobj->object = rwq_ind_tbl; 3133 rwq_ind_tbl->device = ib_dev; 3134 atomic_set(&rwq_ind_tbl->usecnt, 0); 3135 3136 for (i = 0; i < num_wq_handles; i++) 3137 atomic_inc(&wqs[i]->usecnt); 3138 3139 resp.ind_tbl_handle = uobj->id; 3140 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3141 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3142 3143 err = uverbs_response(attrs, &resp, sizeof(resp)); 3144 if (err) 3145 goto err_copy; 3146 3147 kfree(wqs_handles); 3148 3149 for (j = 0; j < num_read_wqs; j++) 3150 uobj_put_obj_read(wqs[j]); 3151 3152 return uobj_alloc_commit(uobj, attrs); 3153 3154 err_copy: 3155 ib_destroy_rwq_ind_table(rwq_ind_tbl); 3156 err_uobj: 3157 uobj_alloc_abort(uobj, attrs); 3158 put_wqs: 3159 for (j = 0; j < num_read_wqs; j++) 3160 uobj_put_obj_read(wqs[j]); 3161 err_free: 3162 kfree(wqs_handles); 3163 kfree(wqs); 3164 return err; 3165 } 3166 3167 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3168 { 3169 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3170 int ret; 3171 3172 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3173 if (ret) 3174 return ret; 3175 3176 if (cmd.comp_mask) 3177 return -EOPNOTSUPP; 3178 3179 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3180 cmd.ind_tbl_handle, attrs); 3181 } 3182 3183 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3184 { 3185 struct ib_uverbs_create_flow cmd; 3186 struct ib_uverbs_create_flow_resp resp; 3187 struct ib_uobject *uobj; 3188 struct ib_flow *flow_id; 3189 struct ib_uverbs_flow_attr *kern_flow_attr; 3190 struct ib_flow_attr *flow_attr; 3191 struct ib_qp *qp; 3192 struct ib_uflow_resources *uflow_res; 3193 struct ib_uverbs_flow_spec_hdr *kern_spec; 3194 struct uverbs_req_iter iter; 3195 int err; 3196 void *ib_spec; 3197 int i; 3198 struct ib_device *ib_dev; 3199 3200 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3201 if (err) 3202 return err; 3203 3204 if (cmd.comp_mask) 3205 return -EINVAL; 3206 3207 if (!capable(CAP_NET_RAW)) 3208 return -EPERM; 3209 3210 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3211 return -EINVAL; 3212 3213 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3214 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3215 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3216 return -EINVAL; 3217 3218 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3219 return -EINVAL; 3220 3221 if (cmd.flow_attr.size > 3222 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3223 return -EINVAL; 3224 3225 if (cmd.flow_attr.reserved[0] || 3226 cmd.flow_attr.reserved[1]) 3227 return -EINVAL; 3228 3229 if (cmd.flow_attr.num_of_specs) { 3230 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3231 GFP_KERNEL); 3232 if (!kern_flow_attr) 3233 return -ENOMEM; 3234 3235 *kern_flow_attr = cmd.flow_attr; 3236 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3237 cmd.flow_attr.size); 3238 if (err) 3239 goto err_free_attr; 3240 } else { 3241 kern_flow_attr = &cmd.flow_attr; 3242 } 3243 3244 err = uverbs_request_finish(&iter); 3245 if (err) 3246 goto err_free_attr; 3247 3248 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3249 if (IS_ERR(uobj)) { 3250 err = PTR_ERR(uobj); 3251 goto err_free_attr; 3252 } 3253 3254 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3255 if (!qp) { 3256 err = -EINVAL; 3257 goto err_uobj; 3258 } 3259 3260 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3261 err = -EINVAL; 3262 goto err_put; 3263 } 3264 3265 flow_attr = kzalloc(struct_size(flow_attr, flows, 3266 cmd.flow_attr.num_of_specs), GFP_KERNEL); 3267 if (!flow_attr) { 3268 err = -ENOMEM; 3269 goto err_put; 3270 } 3271 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3272 if (!uflow_res) { 3273 err = -ENOMEM; 3274 goto err_free_flow_attr; 3275 } 3276 3277 flow_attr->type = kern_flow_attr->type; 3278 flow_attr->priority = kern_flow_attr->priority; 3279 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3280 flow_attr->port = kern_flow_attr->port; 3281 flow_attr->flags = kern_flow_attr->flags; 3282 flow_attr->size = sizeof(*flow_attr); 3283 3284 kern_spec = kern_flow_attr->flow_specs; 3285 ib_spec = flow_attr + 1; 3286 for (i = 0; i < flow_attr->num_of_specs && 3287 cmd.flow_attr.size >= sizeof(*kern_spec) && 3288 cmd.flow_attr.size >= kern_spec->size; 3289 i++) { 3290 err = kern_spec_to_ib_spec( 3291 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3292 ib_spec, uflow_res); 3293 if (err) 3294 goto err_free; 3295 3296 flow_attr->size += 3297 ((union ib_flow_spec *) ib_spec)->size; 3298 cmd.flow_attr.size -= kern_spec->size; 3299 kern_spec = ((void *)kern_spec) + kern_spec->size; 3300 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3301 } 3302 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3303 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n", 3304 i, cmd.flow_attr.size); 3305 err = -EINVAL; 3306 goto err_free; 3307 } 3308 3309 flow_id = qp->device->ops.create_flow( 3310 qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata); 3311 3312 if (IS_ERR(flow_id)) { 3313 err = PTR_ERR(flow_id); 3314 goto err_free; 3315 } 3316 3317 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3318 3319 memset(&resp, 0, sizeof(resp)); 3320 resp.flow_handle = uobj->id; 3321 3322 err = uverbs_response(attrs, &resp, sizeof(resp)); 3323 if (err) 3324 goto err_copy; 3325 3326 uobj_put_obj_read(qp); 3327 kfree(flow_attr); 3328 if (cmd.flow_attr.num_of_specs) 3329 kfree(kern_flow_attr); 3330 return uobj_alloc_commit(uobj, attrs); 3331 err_copy: 3332 if (!qp->device->ops.destroy_flow(flow_id)) 3333 atomic_dec(&qp->usecnt); 3334 err_free: 3335 ib_uverbs_flow_resources_free(uflow_res); 3336 err_free_flow_attr: 3337 kfree(flow_attr); 3338 err_put: 3339 uobj_put_obj_read(qp); 3340 err_uobj: 3341 uobj_alloc_abort(uobj, attrs); 3342 err_free_attr: 3343 if (cmd.flow_attr.num_of_specs) 3344 kfree(kern_flow_attr); 3345 return err; 3346 } 3347 3348 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3349 { 3350 struct ib_uverbs_destroy_flow cmd; 3351 int ret; 3352 3353 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3354 if (ret) 3355 return ret; 3356 3357 if (cmd.comp_mask) 3358 return -EINVAL; 3359 3360 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3361 } 3362 3363 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3364 struct ib_uverbs_create_xsrq *cmd, 3365 struct ib_udata *udata) 3366 { 3367 struct ib_uverbs_create_srq_resp resp; 3368 struct ib_usrq_object *obj; 3369 struct ib_pd *pd; 3370 struct ib_srq *srq; 3371 struct ib_uobject *uninitialized_var(xrcd_uobj); 3372 struct ib_srq_init_attr attr; 3373 int ret; 3374 struct ib_device *ib_dev; 3375 3376 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3377 &ib_dev); 3378 if (IS_ERR(obj)) 3379 return PTR_ERR(obj); 3380 3381 if (cmd->srq_type == IB_SRQT_TM) 3382 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3383 3384 if (cmd->srq_type == IB_SRQT_XRC) { 3385 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3386 attrs); 3387 if (IS_ERR(xrcd_uobj)) { 3388 ret = -EINVAL; 3389 goto err; 3390 } 3391 3392 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3393 if (!attr.ext.xrc.xrcd) { 3394 ret = -EINVAL; 3395 goto err_put_xrcd; 3396 } 3397 3398 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3399 atomic_inc(&obj->uxrcd->refcnt); 3400 } 3401 3402 if (ib_srq_has_cq(cmd->srq_type)) { 3403 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3404 cmd->cq_handle, attrs); 3405 if (!attr.ext.cq) { 3406 ret = -EINVAL; 3407 goto err_put_xrcd; 3408 } 3409 } 3410 3411 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3412 if (!pd) { 3413 ret = -EINVAL; 3414 goto err_put_cq; 3415 } 3416 3417 attr.event_handler = ib_uverbs_srq_event_handler; 3418 attr.srq_context = attrs->ufile; 3419 attr.srq_type = cmd->srq_type; 3420 attr.attr.max_wr = cmd->max_wr; 3421 attr.attr.max_sge = cmd->max_sge; 3422 attr.attr.srq_limit = cmd->srq_limit; 3423 3424 obj->uevent.events_reported = 0; 3425 INIT_LIST_HEAD(&obj->uevent.event_list); 3426 3427 srq = rdma_zalloc_drv_obj(ib_dev, ib_srq); 3428 if (!srq) { 3429 ret = -ENOMEM; 3430 goto err_put; 3431 } 3432 3433 srq->device = pd->device; 3434 srq->pd = pd; 3435 srq->srq_type = cmd->srq_type; 3436 srq->uobject = &obj->uevent.uobject; 3437 srq->event_handler = attr.event_handler; 3438 srq->srq_context = attr.srq_context; 3439 3440 ret = pd->device->ops.create_srq(srq, &attr, udata); 3441 if (ret) 3442 goto err_free; 3443 3444 if (ib_srq_has_cq(cmd->srq_type)) { 3445 srq->ext.cq = attr.ext.cq; 3446 atomic_inc(&attr.ext.cq->usecnt); 3447 } 3448 3449 if (cmd->srq_type == IB_SRQT_XRC) { 3450 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd; 3451 atomic_inc(&attr.ext.xrc.xrcd->usecnt); 3452 } 3453 3454 atomic_inc(&pd->usecnt); 3455 atomic_set(&srq->usecnt, 0); 3456 3457 obj->uevent.uobject.object = srq; 3458 obj->uevent.uobject.user_handle = cmd->user_handle; 3459 3460 memset(&resp, 0, sizeof resp); 3461 resp.srq_handle = obj->uevent.uobject.id; 3462 resp.max_wr = attr.attr.max_wr; 3463 resp.max_sge = attr.attr.max_sge; 3464 if (cmd->srq_type == IB_SRQT_XRC) 3465 resp.srqn = srq->ext.xrc.srq_num; 3466 3467 ret = uverbs_response(attrs, &resp, sizeof(resp)); 3468 if (ret) 3469 goto err_copy; 3470 3471 if (cmd->srq_type == IB_SRQT_XRC) 3472 uobj_put_read(xrcd_uobj); 3473 3474 if (ib_srq_has_cq(cmd->srq_type)) 3475 uobj_put_obj_read(attr.ext.cq); 3476 3477 uobj_put_obj_read(pd); 3478 return uobj_alloc_commit(&obj->uevent.uobject, attrs); 3479 3480 err_copy: 3481 ib_destroy_srq_user(srq, uverbs_get_cleared_udata(attrs)); 3482 /* It was released in ib_destroy_srq_user */ 3483 srq = NULL; 3484 err_free: 3485 kfree(srq); 3486 err_put: 3487 uobj_put_obj_read(pd); 3488 3489 err_put_cq: 3490 if (ib_srq_has_cq(cmd->srq_type)) 3491 uobj_put_obj_read(attr.ext.cq); 3492 3493 err_put_xrcd: 3494 if (cmd->srq_type == IB_SRQT_XRC) { 3495 atomic_dec(&obj->uxrcd->refcnt); 3496 uobj_put_read(xrcd_uobj); 3497 } 3498 3499 err: 3500 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3501 return ret; 3502 } 3503 3504 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3505 { 3506 struct ib_uverbs_create_srq cmd; 3507 struct ib_uverbs_create_xsrq xcmd; 3508 int ret; 3509 3510 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3511 if (ret) 3512 return ret; 3513 3514 memset(&xcmd, 0, sizeof(xcmd)); 3515 xcmd.response = cmd.response; 3516 xcmd.user_handle = cmd.user_handle; 3517 xcmd.srq_type = IB_SRQT_BASIC; 3518 xcmd.pd_handle = cmd.pd_handle; 3519 xcmd.max_wr = cmd.max_wr; 3520 xcmd.max_sge = cmd.max_sge; 3521 xcmd.srq_limit = cmd.srq_limit; 3522 3523 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3524 } 3525 3526 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3527 { 3528 struct ib_uverbs_create_xsrq cmd; 3529 int ret; 3530 3531 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3532 if (ret) 3533 return ret; 3534 3535 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3536 } 3537 3538 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3539 { 3540 struct ib_uverbs_modify_srq cmd; 3541 struct ib_srq *srq; 3542 struct ib_srq_attr attr; 3543 int ret; 3544 3545 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3546 if (ret) 3547 return ret; 3548 3549 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3550 if (!srq) 3551 return -EINVAL; 3552 3553 attr.max_wr = cmd.max_wr; 3554 attr.srq_limit = cmd.srq_limit; 3555 3556 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3557 &attrs->driver_udata); 3558 3559 uobj_put_obj_read(srq); 3560 3561 return ret; 3562 } 3563 3564 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3565 { 3566 struct ib_uverbs_query_srq cmd; 3567 struct ib_uverbs_query_srq_resp resp; 3568 struct ib_srq_attr attr; 3569 struct ib_srq *srq; 3570 int ret; 3571 3572 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3573 if (ret) 3574 return ret; 3575 3576 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3577 if (!srq) 3578 return -EINVAL; 3579 3580 ret = ib_query_srq(srq, &attr); 3581 3582 uobj_put_obj_read(srq); 3583 3584 if (ret) 3585 return ret; 3586 3587 memset(&resp, 0, sizeof resp); 3588 3589 resp.max_wr = attr.max_wr; 3590 resp.max_sge = attr.max_sge; 3591 resp.srq_limit = attr.srq_limit; 3592 3593 return uverbs_response(attrs, &resp, sizeof(resp)); 3594 } 3595 3596 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3597 { 3598 struct ib_uverbs_destroy_srq cmd; 3599 struct ib_uverbs_destroy_srq_resp resp; 3600 struct ib_uobject *uobj; 3601 struct ib_uevent_object *obj; 3602 int ret; 3603 3604 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3605 if (ret) 3606 return ret; 3607 3608 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3609 if (IS_ERR(uobj)) 3610 return PTR_ERR(uobj); 3611 3612 obj = container_of(uobj, struct ib_uevent_object, uobject); 3613 memset(&resp, 0, sizeof(resp)); 3614 resp.events_reported = obj->events_reported; 3615 3616 uobj_put_destroy(uobj); 3617 3618 return uverbs_response(attrs, &resp, sizeof(resp)); 3619 } 3620 3621 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3622 { 3623 struct ib_uverbs_ex_query_device_resp resp = {}; 3624 struct ib_uverbs_ex_query_device cmd; 3625 struct ib_device_attr attr = {0}; 3626 struct ib_ucontext *ucontext; 3627 struct ib_device *ib_dev; 3628 int err; 3629 3630 ucontext = ib_uverbs_get_ucontext(attrs); 3631 if (IS_ERR(ucontext)) 3632 return PTR_ERR(ucontext); 3633 ib_dev = ucontext->device; 3634 3635 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3636 if (err) 3637 return err; 3638 3639 if (cmd.comp_mask) 3640 return -EINVAL; 3641 3642 if (cmd.reserved) 3643 return -EINVAL; 3644 3645 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3646 if (err) 3647 return err; 3648 3649 copy_query_dev_fields(ucontext, &resp.base, &attr); 3650 3651 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3652 resp.odp_caps.per_transport_caps.rc_odp_caps = 3653 attr.odp_caps.per_transport_caps.rc_odp_caps; 3654 resp.odp_caps.per_transport_caps.uc_odp_caps = 3655 attr.odp_caps.per_transport_caps.uc_odp_caps; 3656 resp.odp_caps.per_transport_caps.ud_odp_caps = 3657 attr.odp_caps.per_transport_caps.ud_odp_caps; 3658 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3659 3660 resp.timestamp_mask = attr.timestamp_mask; 3661 resp.hca_core_clock = attr.hca_core_clock; 3662 resp.device_cap_flags_ex = attr.device_cap_flags; 3663 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3664 resp.rss_caps.max_rwq_indirection_tables = 3665 attr.rss_caps.max_rwq_indirection_tables; 3666 resp.rss_caps.max_rwq_indirection_table_size = 3667 attr.rss_caps.max_rwq_indirection_table_size; 3668 resp.max_wq_type_rq = attr.max_wq_type_rq; 3669 resp.raw_packet_caps = attr.raw_packet_caps; 3670 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3671 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3672 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3673 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3674 resp.tm_caps.flags = attr.tm_caps.flags; 3675 resp.cq_moderation_caps.max_cq_moderation_count = 3676 attr.cq_caps.max_cq_moderation_count; 3677 resp.cq_moderation_caps.max_cq_moderation_period = 3678 attr.cq_caps.max_cq_moderation_period; 3679 resp.max_dm_size = attr.max_dm_size; 3680 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3681 3682 return uverbs_response(attrs, &resp, sizeof(resp)); 3683 } 3684 3685 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3686 { 3687 struct ib_uverbs_ex_modify_cq cmd; 3688 struct ib_cq *cq; 3689 int ret; 3690 3691 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3692 if (ret) 3693 return ret; 3694 3695 if (!cmd.attr_mask || cmd.reserved) 3696 return -EINVAL; 3697 3698 if (cmd.attr_mask > IB_CQ_MODERATE) 3699 return -EOPNOTSUPP; 3700 3701 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3702 if (!cq) 3703 return -EINVAL; 3704 3705 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3706 3707 uobj_put_obj_read(cq); 3708 3709 return ret; 3710 } 3711 3712 /* 3713 * Describe the input structs for write(). Some write methods have an input 3714 * only struct, most have an input and output. If the struct has an output then 3715 * the 'response' u64 must be the first field in the request structure. 3716 * 3717 * If udata is present then both the request and response structs have a 3718 * trailing driver_data flex array. In this case the size of the base struct 3719 * cannot be changed. 3720 */ 3721 #define UAPI_DEF_WRITE_IO(req, resp) \ 3722 .write.has_resp = 1 + \ 3723 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3724 BUILD_BUG_ON_ZERO(sizeof(((req *)0)->response) != \ 3725 sizeof(u64)), \ 3726 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3727 3728 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3729 3730 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3731 UAPI_DEF_WRITE_IO(req, resp), \ 3732 .write.has_udata = \ 3733 1 + \ 3734 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3735 sizeof(req)) + \ 3736 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3737 sizeof(resp)) 3738 3739 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3740 UAPI_DEF_WRITE_I(req), \ 3741 .write.has_udata = \ 3742 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3743 sizeof(req)) 3744 3745 /* 3746 * The _EX versions are for use with WRITE_EX and allow the last struct member 3747 * to be specified. Buffers that do not include that member will be rejected. 3748 */ 3749 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3750 .write.has_resp = 1, \ 3751 .write.req_size = offsetofend(req, req_last_member), \ 3752 .write.resp_size = offsetofend(resp, resp_last_member) 3753 3754 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3755 .write.req_size = offsetofend(req, req_last_member) 3756 3757 const struct uapi_definition uverbs_def_write_intf[] = { 3758 DECLARE_UVERBS_OBJECT( 3759 UVERBS_OBJECT_AH, 3760 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3761 ib_uverbs_create_ah, 3762 UAPI_DEF_WRITE_UDATA_IO( 3763 struct ib_uverbs_create_ah, 3764 struct ib_uverbs_create_ah_resp), 3765 UAPI_DEF_METHOD_NEEDS_FN(create_ah)), 3766 DECLARE_UVERBS_WRITE( 3767 IB_USER_VERBS_CMD_DESTROY_AH, 3768 ib_uverbs_destroy_ah, 3769 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah), 3770 UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))), 3771 3772 DECLARE_UVERBS_OBJECT( 3773 UVERBS_OBJECT_COMP_CHANNEL, 3774 DECLARE_UVERBS_WRITE( 3775 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3776 ib_uverbs_create_comp_channel, 3777 UAPI_DEF_WRITE_IO( 3778 struct ib_uverbs_create_comp_channel, 3779 struct ib_uverbs_create_comp_channel_resp))), 3780 3781 DECLARE_UVERBS_OBJECT( 3782 UVERBS_OBJECT_CQ, 3783 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3784 ib_uverbs_create_cq, 3785 UAPI_DEF_WRITE_UDATA_IO( 3786 struct ib_uverbs_create_cq, 3787 struct ib_uverbs_create_cq_resp), 3788 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3789 DECLARE_UVERBS_WRITE( 3790 IB_USER_VERBS_CMD_DESTROY_CQ, 3791 ib_uverbs_destroy_cq, 3792 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3793 struct ib_uverbs_destroy_cq_resp), 3794 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3795 DECLARE_UVERBS_WRITE( 3796 IB_USER_VERBS_CMD_POLL_CQ, 3797 ib_uverbs_poll_cq, 3798 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3799 struct ib_uverbs_poll_cq_resp), 3800 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3801 DECLARE_UVERBS_WRITE( 3802 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3803 ib_uverbs_req_notify_cq, 3804 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3805 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3806 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3807 ib_uverbs_resize_cq, 3808 UAPI_DEF_WRITE_UDATA_IO( 3809 struct ib_uverbs_resize_cq, 3810 struct ib_uverbs_resize_cq_resp), 3811 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3812 DECLARE_UVERBS_WRITE_EX( 3813 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3814 ib_uverbs_ex_create_cq, 3815 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3816 reserved, 3817 struct ib_uverbs_ex_create_cq_resp, 3818 response_length), 3819 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3820 DECLARE_UVERBS_WRITE_EX( 3821 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3822 ib_uverbs_ex_modify_cq, 3823 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3824 UAPI_DEF_METHOD_NEEDS_FN(create_cq))), 3825 3826 DECLARE_UVERBS_OBJECT( 3827 UVERBS_OBJECT_DEVICE, 3828 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3829 ib_uverbs_get_context, 3830 UAPI_DEF_WRITE_UDATA_IO( 3831 struct ib_uverbs_get_context, 3832 struct ib_uverbs_get_context_resp)), 3833 DECLARE_UVERBS_WRITE( 3834 IB_USER_VERBS_CMD_QUERY_DEVICE, 3835 ib_uverbs_query_device, 3836 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3837 struct ib_uverbs_query_device_resp)), 3838 DECLARE_UVERBS_WRITE( 3839 IB_USER_VERBS_CMD_QUERY_PORT, 3840 ib_uverbs_query_port, 3841 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3842 struct ib_uverbs_query_port_resp), 3843 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3844 DECLARE_UVERBS_WRITE_EX( 3845 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3846 ib_uverbs_ex_query_device, 3847 UAPI_DEF_WRITE_IO_EX( 3848 struct ib_uverbs_ex_query_device, 3849 reserved, 3850 struct ib_uverbs_ex_query_device_resp, 3851 response_length), 3852 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3853 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3854 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3855 3856 DECLARE_UVERBS_OBJECT( 3857 UVERBS_OBJECT_FLOW, 3858 DECLARE_UVERBS_WRITE_EX( 3859 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3860 ib_uverbs_ex_create_flow, 3861 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3862 flow_attr, 3863 struct ib_uverbs_create_flow_resp, 3864 flow_handle), 3865 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3866 DECLARE_UVERBS_WRITE_EX( 3867 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3868 ib_uverbs_ex_destroy_flow, 3869 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3870 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3871 3872 DECLARE_UVERBS_OBJECT( 3873 UVERBS_OBJECT_MR, 3874 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3875 ib_uverbs_dereg_mr, 3876 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3877 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3878 DECLARE_UVERBS_WRITE( 3879 IB_USER_VERBS_CMD_REG_MR, 3880 ib_uverbs_reg_mr, 3881 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3882 struct ib_uverbs_reg_mr_resp), 3883 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3884 DECLARE_UVERBS_WRITE( 3885 IB_USER_VERBS_CMD_REREG_MR, 3886 ib_uverbs_rereg_mr, 3887 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3888 struct ib_uverbs_rereg_mr_resp), 3889 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3890 3891 DECLARE_UVERBS_OBJECT( 3892 UVERBS_OBJECT_MW, 3893 DECLARE_UVERBS_WRITE( 3894 IB_USER_VERBS_CMD_ALLOC_MW, 3895 ib_uverbs_alloc_mw, 3896 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3897 struct ib_uverbs_alloc_mw_resp), 3898 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3899 DECLARE_UVERBS_WRITE( 3900 IB_USER_VERBS_CMD_DEALLOC_MW, 3901 ib_uverbs_dealloc_mw, 3902 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3903 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3904 3905 DECLARE_UVERBS_OBJECT( 3906 UVERBS_OBJECT_PD, 3907 DECLARE_UVERBS_WRITE( 3908 IB_USER_VERBS_CMD_ALLOC_PD, 3909 ib_uverbs_alloc_pd, 3910 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3911 struct ib_uverbs_alloc_pd_resp), 3912 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3913 DECLARE_UVERBS_WRITE( 3914 IB_USER_VERBS_CMD_DEALLOC_PD, 3915 ib_uverbs_dealloc_pd, 3916 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3917 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3918 3919 DECLARE_UVERBS_OBJECT( 3920 UVERBS_OBJECT_QP, 3921 DECLARE_UVERBS_WRITE( 3922 IB_USER_VERBS_CMD_ATTACH_MCAST, 3923 ib_uverbs_attach_mcast, 3924 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3925 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3926 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3927 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3928 ib_uverbs_create_qp, 3929 UAPI_DEF_WRITE_UDATA_IO( 3930 struct ib_uverbs_create_qp, 3931 struct ib_uverbs_create_qp_resp), 3932 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3933 DECLARE_UVERBS_WRITE( 3934 IB_USER_VERBS_CMD_DESTROY_QP, 3935 ib_uverbs_destroy_qp, 3936 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3937 struct ib_uverbs_destroy_qp_resp), 3938 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3939 DECLARE_UVERBS_WRITE( 3940 IB_USER_VERBS_CMD_DETACH_MCAST, 3941 ib_uverbs_detach_mcast, 3942 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3943 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3944 DECLARE_UVERBS_WRITE( 3945 IB_USER_VERBS_CMD_MODIFY_QP, 3946 ib_uverbs_modify_qp, 3947 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3948 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3949 DECLARE_UVERBS_WRITE( 3950 IB_USER_VERBS_CMD_POST_RECV, 3951 ib_uverbs_post_recv, 3952 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3953 struct ib_uverbs_post_recv_resp), 3954 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3955 DECLARE_UVERBS_WRITE( 3956 IB_USER_VERBS_CMD_POST_SEND, 3957 ib_uverbs_post_send, 3958 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3959 struct ib_uverbs_post_send_resp), 3960 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3961 DECLARE_UVERBS_WRITE( 3962 IB_USER_VERBS_CMD_QUERY_QP, 3963 ib_uverbs_query_qp, 3964 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3965 struct ib_uverbs_query_qp_resp), 3966 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3967 DECLARE_UVERBS_WRITE_EX( 3968 IB_USER_VERBS_EX_CMD_CREATE_QP, 3969 ib_uverbs_ex_create_qp, 3970 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3971 comp_mask, 3972 struct ib_uverbs_ex_create_qp_resp, 3973 response_length), 3974 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3975 DECLARE_UVERBS_WRITE_EX( 3976 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3977 ib_uverbs_ex_modify_qp, 3978 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3979 base, 3980 struct ib_uverbs_ex_modify_qp_resp, 3981 response_length), 3982 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3983 3984 DECLARE_UVERBS_OBJECT( 3985 UVERBS_OBJECT_RWQ_IND_TBL, 3986 DECLARE_UVERBS_WRITE_EX( 3987 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3988 ib_uverbs_ex_create_rwq_ind_table, 3989 UAPI_DEF_WRITE_IO_EX( 3990 struct ib_uverbs_ex_create_rwq_ind_table, 3991 log_ind_tbl_size, 3992 struct ib_uverbs_ex_create_rwq_ind_table_resp, 3993 ind_tbl_num), 3994 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 3995 DECLARE_UVERBS_WRITE_EX( 3996 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 3997 ib_uverbs_ex_destroy_rwq_ind_table, 3998 UAPI_DEF_WRITE_I( 3999 struct ib_uverbs_ex_destroy_rwq_ind_table), 4000 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 4001 4002 DECLARE_UVERBS_OBJECT( 4003 UVERBS_OBJECT_WQ, 4004 DECLARE_UVERBS_WRITE_EX( 4005 IB_USER_VERBS_EX_CMD_CREATE_WQ, 4006 ib_uverbs_ex_create_wq, 4007 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 4008 max_sge, 4009 struct ib_uverbs_ex_create_wq_resp, 4010 wqn), 4011 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 4012 DECLARE_UVERBS_WRITE_EX( 4013 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 4014 ib_uverbs_ex_destroy_wq, 4015 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 4016 wq_handle, 4017 struct ib_uverbs_ex_destroy_wq_resp, 4018 reserved), 4019 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 4020 DECLARE_UVERBS_WRITE_EX( 4021 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 4022 ib_uverbs_ex_modify_wq, 4023 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 4024 curr_wq_state), 4025 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 4026 4027 DECLARE_UVERBS_OBJECT( 4028 UVERBS_OBJECT_SRQ, 4029 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 4030 ib_uverbs_create_srq, 4031 UAPI_DEF_WRITE_UDATA_IO( 4032 struct ib_uverbs_create_srq, 4033 struct ib_uverbs_create_srq_resp), 4034 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4035 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 4036 ib_uverbs_create_xsrq, 4037 UAPI_DEF_WRITE_UDATA_IO( 4038 struct ib_uverbs_create_xsrq, 4039 struct ib_uverbs_create_srq_resp), 4040 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4041 DECLARE_UVERBS_WRITE( 4042 IB_USER_VERBS_CMD_DESTROY_SRQ, 4043 ib_uverbs_destroy_srq, 4044 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4045 struct ib_uverbs_destroy_srq_resp), 4046 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4047 DECLARE_UVERBS_WRITE( 4048 IB_USER_VERBS_CMD_MODIFY_SRQ, 4049 ib_uverbs_modify_srq, 4050 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4051 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4052 DECLARE_UVERBS_WRITE( 4053 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4054 ib_uverbs_post_srq_recv, 4055 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4056 struct ib_uverbs_post_srq_recv_resp), 4057 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4058 DECLARE_UVERBS_WRITE( 4059 IB_USER_VERBS_CMD_QUERY_SRQ, 4060 ib_uverbs_query_srq, 4061 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4062 struct ib_uverbs_query_srq_resp), 4063 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4064 4065 DECLARE_UVERBS_OBJECT( 4066 UVERBS_OBJECT_XRCD, 4067 DECLARE_UVERBS_WRITE( 4068 IB_USER_VERBS_CMD_CLOSE_XRCD, 4069 ib_uverbs_close_xrcd, 4070 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd), 4071 UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)), 4072 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4073 ib_uverbs_open_qp, 4074 UAPI_DEF_WRITE_UDATA_IO( 4075 struct ib_uverbs_open_qp, 4076 struct ib_uverbs_create_qp_resp)), 4077 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4078 ib_uverbs_open_xrcd, 4079 UAPI_DEF_WRITE_UDATA_IO( 4080 struct ib_uverbs_open_xrcd, 4081 struct ib_uverbs_open_xrcd_resp), 4082 UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))), 4083 4084 {}, 4085 }; 4086