1 /* 2 * Copyright (c) 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved. 4 * Copyright (c) 2005 PathScale, Inc. All rights reserved. 5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include <linux/file.h> 37 #include <linux/fs.h> 38 #include <linux/slab.h> 39 #include <linux/sched.h> 40 41 #include <linux/uaccess.h> 42 43 #include <rdma/uverbs_types.h> 44 #include <rdma/uverbs_std_types.h> 45 #include "rdma_core.h" 46 47 #include "uverbs.h" 48 #include "core_priv.h" 49 50 /* 51 * Copy a response to userspace. If the provided 'resp' is larger than the 52 * user buffer it is silently truncated. If the user provided a larger buffer 53 * then the trailing portion is zero filled. 54 * 55 * These semantics are intended to support future extension of the output 56 * structures. 57 */ 58 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp, 59 size_t resp_len) 60 { 61 int ret; 62 63 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 64 return uverbs_copy_to_struct_or_zero( 65 attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len); 66 67 if (copy_to_user(attrs->ucore.outbuf, resp, 68 min(attrs->ucore.outlen, resp_len))) 69 return -EFAULT; 70 71 if (resp_len < attrs->ucore.outlen) { 72 /* 73 * Zero fill any extra memory that user 74 * space might have provided. 75 */ 76 ret = clear_user(attrs->ucore.outbuf + resp_len, 77 attrs->ucore.outlen - resp_len); 78 if (ret) 79 return -EFAULT; 80 } 81 82 return 0; 83 } 84 85 /* 86 * Copy a request from userspace. If the provided 'req' is larger than the 87 * user buffer then the user buffer is zero extended into the 'req'. If 'req' 88 * is smaller than the user buffer then the uncopied bytes in the user buffer 89 * must be zero. 90 */ 91 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req, 92 size_t req_len) 93 { 94 if (copy_from_user(req, attrs->ucore.inbuf, 95 min(attrs->ucore.inlen, req_len))) 96 return -EFAULT; 97 98 if (attrs->ucore.inlen < req_len) { 99 memset(req + attrs->ucore.inlen, 0, 100 req_len - attrs->ucore.inlen); 101 } else if (attrs->ucore.inlen > req_len) { 102 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len, 103 attrs->ucore.inlen - req_len)) 104 return -EOPNOTSUPP; 105 } 106 return 0; 107 } 108 109 /* 110 * Generate the value for the 'response_length' protocol used by write_ex. 111 * This is the number of bytes the kernel actually wrote. Userspace can use 112 * this to detect what structure members in the response the kernel 113 * understood. 114 */ 115 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs, 116 size_t resp_len) 117 { 118 return min_t(size_t, attrs->ucore.outlen, resp_len); 119 } 120 121 /* 122 * The iterator version of the request interface is for handlers that need to 123 * step over a flex array at the end of a command header. 124 */ 125 struct uverbs_req_iter { 126 const void __user *cur; 127 const void __user *end; 128 }; 129 130 static int uverbs_request_start(struct uverbs_attr_bundle *attrs, 131 struct uverbs_req_iter *iter, 132 void *req, 133 size_t req_len) 134 { 135 if (attrs->ucore.inlen < req_len) 136 return -ENOSPC; 137 138 if (copy_from_user(req, attrs->ucore.inbuf, req_len)) 139 return -EFAULT; 140 141 iter->cur = attrs->ucore.inbuf + req_len; 142 iter->end = attrs->ucore.inbuf + attrs->ucore.inlen; 143 return 0; 144 } 145 146 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val, 147 size_t len) 148 { 149 if (iter->cur + len > iter->end) 150 return -ENOSPC; 151 152 if (copy_from_user(val, iter->cur, len)) 153 return -EFAULT; 154 155 iter->cur += len; 156 return 0; 157 } 158 159 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter, 160 size_t len) 161 { 162 const void __user *res = iter->cur; 163 164 if (iter->cur + len > iter->end) 165 return (void __force __user *)ERR_PTR(-ENOSPC); 166 iter->cur += len; 167 return res; 168 } 169 170 static int uverbs_request_finish(struct uverbs_req_iter *iter) 171 { 172 if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur)) 173 return -EOPNOTSUPP; 174 return 0; 175 } 176 177 /* 178 * When calling a destroy function during an error unwind we need to pass in 179 * the udata that is sanitized of all user arguments. Ie from the driver 180 * perspective it looks like no udata was passed. 181 */ 182 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs) 183 { 184 attrs->driver_udata = (struct ib_udata){}; 185 return &attrs->driver_udata; 186 } 187 188 static struct ib_uverbs_completion_event_file * 189 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs) 190 { 191 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL, 192 fd, attrs); 193 194 if (IS_ERR(uobj)) 195 return (void *)uobj; 196 197 uverbs_uobject_get(uobj); 198 uobj_put_read(uobj); 199 200 return container_of(uobj, struct ib_uverbs_completion_event_file, 201 uobj); 202 } 203 #define ib_uverbs_lookup_comp_file(_fd, _ufile) \ 204 _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile) 205 206 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs) 207 { 208 struct ib_uverbs_file *ufile = attrs->ufile; 209 struct ib_ucontext *ucontext; 210 struct ib_device *ib_dev; 211 212 ib_dev = srcu_dereference(ufile->device->ib_dev, 213 &ufile->device->disassociate_srcu); 214 if (!ib_dev) 215 return -EIO; 216 217 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext); 218 if (!ucontext) 219 return -ENOMEM; 220 221 ucontext->res.type = RDMA_RESTRACK_CTX; 222 ucontext->device = ib_dev; 223 ucontext->ufile = ufile; 224 xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC); 225 attrs->context = ucontext; 226 return 0; 227 } 228 229 int ib_init_ucontext(struct uverbs_attr_bundle *attrs) 230 { 231 struct ib_ucontext *ucontext = attrs->context; 232 struct ib_uverbs_file *file = attrs->ufile; 233 int ret; 234 235 if (!down_read_trylock(&file->hw_destroy_rwsem)) 236 return -EIO; 237 mutex_lock(&file->ucontext_lock); 238 if (file->ucontext) { 239 ret = -EINVAL; 240 goto err; 241 } 242 243 ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device, 244 RDMACG_RESOURCE_HCA_HANDLE); 245 if (ret) 246 goto err; 247 248 ret = ucontext->device->ops.alloc_ucontext(ucontext, 249 &attrs->driver_udata); 250 if (ret) 251 goto err_uncharge; 252 253 rdma_restrack_uadd(&ucontext->res); 254 255 /* 256 * Make sure that ib_uverbs_get_ucontext() sees the pointer update 257 * only after all writes to setup the ucontext have completed 258 */ 259 smp_store_release(&file->ucontext, ucontext); 260 261 mutex_unlock(&file->ucontext_lock); 262 up_read(&file->hw_destroy_rwsem); 263 return 0; 264 265 err_uncharge: 266 ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device, 267 RDMACG_RESOURCE_HCA_HANDLE); 268 err: 269 mutex_unlock(&file->ucontext_lock); 270 up_read(&file->hw_destroy_rwsem); 271 return ret; 272 } 273 274 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs) 275 { 276 struct ib_uverbs_get_context_resp resp; 277 struct ib_uverbs_get_context cmd; 278 struct ib_device *ib_dev; 279 struct ib_uobject *uobj; 280 int ret; 281 282 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 283 if (ret) 284 return ret; 285 286 ret = ib_alloc_ucontext(attrs); 287 if (ret) 288 return ret; 289 290 uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev); 291 if (IS_ERR(uobj)) { 292 ret = PTR_ERR(uobj); 293 goto err_ucontext; 294 } 295 296 resp = (struct ib_uverbs_get_context_resp){ 297 .num_comp_vectors = attrs->ufile->device->num_comp_vectors, 298 .async_fd = uobj->id, 299 }; 300 ret = uverbs_response(attrs, &resp, sizeof(resp)); 301 if (ret) 302 goto err_uobj; 303 304 ret = ib_init_ucontext(attrs); 305 if (ret) 306 goto err_uobj; 307 308 ib_uverbs_init_async_event_file( 309 container_of(uobj, struct ib_uverbs_async_event_file, uobj)); 310 rdma_alloc_commit_uobject(uobj, attrs); 311 return 0; 312 313 err_uobj: 314 rdma_alloc_abort_uobject(uobj, attrs, false); 315 err_ucontext: 316 kfree(attrs->context); 317 attrs->context = NULL; 318 return ret; 319 } 320 321 static void copy_query_dev_fields(struct ib_ucontext *ucontext, 322 struct ib_uverbs_query_device_resp *resp, 323 struct ib_device_attr *attr) 324 { 325 struct ib_device *ib_dev = ucontext->device; 326 327 resp->fw_ver = attr->fw_ver; 328 resp->node_guid = ib_dev->node_guid; 329 resp->sys_image_guid = attr->sys_image_guid; 330 resp->max_mr_size = attr->max_mr_size; 331 resp->page_size_cap = attr->page_size_cap; 332 resp->vendor_id = attr->vendor_id; 333 resp->vendor_part_id = attr->vendor_part_id; 334 resp->hw_ver = attr->hw_ver; 335 resp->max_qp = attr->max_qp; 336 resp->max_qp_wr = attr->max_qp_wr; 337 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags); 338 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge); 339 resp->max_sge_rd = attr->max_sge_rd; 340 resp->max_cq = attr->max_cq; 341 resp->max_cqe = attr->max_cqe; 342 resp->max_mr = attr->max_mr; 343 resp->max_pd = attr->max_pd; 344 resp->max_qp_rd_atom = attr->max_qp_rd_atom; 345 resp->max_ee_rd_atom = attr->max_ee_rd_atom; 346 resp->max_res_rd_atom = attr->max_res_rd_atom; 347 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; 348 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; 349 resp->atomic_cap = attr->atomic_cap; 350 resp->max_ee = attr->max_ee; 351 resp->max_rdd = attr->max_rdd; 352 resp->max_mw = attr->max_mw; 353 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; 354 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; 355 resp->max_mcast_grp = attr->max_mcast_grp; 356 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; 357 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; 358 resp->max_ah = attr->max_ah; 359 resp->max_srq = attr->max_srq; 360 resp->max_srq_wr = attr->max_srq_wr; 361 resp->max_srq_sge = attr->max_srq_sge; 362 resp->max_pkeys = attr->max_pkeys; 363 resp->local_ca_ack_delay = attr->local_ca_ack_delay; 364 resp->phys_port_cnt = ib_dev->phys_port_cnt; 365 } 366 367 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs) 368 { 369 struct ib_uverbs_query_device cmd; 370 struct ib_uverbs_query_device_resp resp; 371 struct ib_ucontext *ucontext; 372 int ret; 373 374 ucontext = ib_uverbs_get_ucontext(attrs); 375 if (IS_ERR(ucontext)) 376 return PTR_ERR(ucontext); 377 378 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 379 if (ret) 380 return ret; 381 382 memset(&resp, 0, sizeof resp); 383 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs); 384 385 return uverbs_response(attrs, &resp, sizeof(resp)); 386 } 387 388 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs) 389 { 390 struct ib_uverbs_query_port cmd; 391 struct ib_uverbs_query_port_resp resp; 392 struct ib_port_attr attr; 393 int ret; 394 struct ib_ucontext *ucontext; 395 struct ib_device *ib_dev; 396 397 ucontext = ib_uverbs_get_ucontext(attrs); 398 if (IS_ERR(ucontext)) 399 return PTR_ERR(ucontext); 400 ib_dev = ucontext->device; 401 402 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 403 if (ret) 404 return ret; 405 406 ret = ib_query_port(ib_dev, cmd.port_num, &attr); 407 if (ret) 408 return ret; 409 410 memset(&resp, 0, sizeof resp); 411 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num); 412 413 return uverbs_response(attrs, &resp, sizeof(resp)); 414 } 415 416 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs) 417 { 418 struct ib_uverbs_alloc_pd cmd; 419 struct ib_uverbs_alloc_pd_resp resp; 420 struct ib_uobject *uobj; 421 struct ib_pd *pd; 422 int ret; 423 struct ib_device *ib_dev; 424 425 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 426 if (ret) 427 return ret; 428 429 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev); 430 if (IS_ERR(uobj)) 431 return PTR_ERR(uobj); 432 433 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd); 434 if (!pd) { 435 ret = -ENOMEM; 436 goto err; 437 } 438 439 pd->device = ib_dev; 440 pd->uobject = uobj; 441 pd->__internal_mr = NULL; 442 atomic_set(&pd->usecnt, 0); 443 pd->res.type = RDMA_RESTRACK_PD; 444 445 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata); 446 if (ret) 447 goto err_alloc; 448 449 uobj->object = pd; 450 memset(&resp, 0, sizeof resp); 451 resp.pd_handle = uobj->id; 452 rdma_restrack_uadd(&pd->res); 453 454 ret = uverbs_response(attrs, &resp, sizeof(resp)); 455 if (ret) 456 goto err_copy; 457 458 rdma_alloc_commit_uobject(uobj, attrs); 459 return 0; 460 461 err_copy: 462 ib_dealloc_pd_user(pd, uverbs_get_cleared_udata(attrs)); 463 pd = NULL; 464 err_alloc: 465 kfree(pd); 466 err: 467 uobj_alloc_abort(uobj, attrs); 468 return ret; 469 } 470 471 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs) 472 { 473 struct ib_uverbs_dealloc_pd cmd; 474 int ret; 475 476 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 477 if (ret) 478 return ret; 479 480 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 481 } 482 483 struct xrcd_table_entry { 484 struct rb_node node; 485 struct ib_xrcd *xrcd; 486 struct inode *inode; 487 }; 488 489 static int xrcd_table_insert(struct ib_uverbs_device *dev, 490 struct inode *inode, 491 struct ib_xrcd *xrcd) 492 { 493 struct xrcd_table_entry *entry, *scan; 494 struct rb_node **p = &dev->xrcd_tree.rb_node; 495 struct rb_node *parent = NULL; 496 497 entry = kmalloc(sizeof *entry, GFP_KERNEL); 498 if (!entry) 499 return -ENOMEM; 500 501 entry->xrcd = xrcd; 502 entry->inode = inode; 503 504 while (*p) { 505 parent = *p; 506 scan = rb_entry(parent, struct xrcd_table_entry, node); 507 508 if (inode < scan->inode) { 509 p = &(*p)->rb_left; 510 } else if (inode > scan->inode) { 511 p = &(*p)->rb_right; 512 } else { 513 kfree(entry); 514 return -EEXIST; 515 } 516 } 517 518 rb_link_node(&entry->node, parent, p); 519 rb_insert_color(&entry->node, &dev->xrcd_tree); 520 igrab(inode); 521 return 0; 522 } 523 524 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, 525 struct inode *inode) 526 { 527 struct xrcd_table_entry *entry; 528 struct rb_node *p = dev->xrcd_tree.rb_node; 529 530 while (p) { 531 entry = rb_entry(p, struct xrcd_table_entry, node); 532 533 if (inode < entry->inode) 534 p = p->rb_left; 535 else if (inode > entry->inode) 536 p = p->rb_right; 537 else 538 return entry; 539 } 540 541 return NULL; 542 } 543 544 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) 545 { 546 struct xrcd_table_entry *entry; 547 548 entry = xrcd_table_search(dev, inode); 549 if (!entry) 550 return NULL; 551 552 return entry->xrcd; 553 } 554 555 static void xrcd_table_delete(struct ib_uverbs_device *dev, 556 struct inode *inode) 557 { 558 struct xrcd_table_entry *entry; 559 560 entry = xrcd_table_search(dev, inode); 561 if (entry) { 562 iput(inode); 563 rb_erase(&entry->node, &dev->xrcd_tree); 564 kfree(entry); 565 } 566 } 567 568 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs) 569 { 570 struct ib_uverbs_device *ibudev = attrs->ufile->device; 571 struct ib_uverbs_open_xrcd cmd; 572 struct ib_uverbs_open_xrcd_resp resp; 573 struct ib_uxrcd_object *obj; 574 struct ib_xrcd *xrcd = NULL; 575 struct fd f = {NULL, 0}; 576 struct inode *inode = NULL; 577 int ret = 0; 578 int new_xrcd = 0; 579 struct ib_device *ib_dev; 580 581 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 582 if (ret) 583 return ret; 584 585 mutex_lock(&ibudev->xrcd_tree_mutex); 586 587 if (cmd.fd != -1) { 588 /* search for file descriptor */ 589 f = fdget(cmd.fd); 590 if (!f.file) { 591 ret = -EBADF; 592 goto err_tree_mutex_unlock; 593 } 594 595 inode = file_inode(f.file); 596 xrcd = find_xrcd(ibudev, inode); 597 if (!xrcd && !(cmd.oflags & O_CREAT)) { 598 /* no file descriptor. Need CREATE flag */ 599 ret = -EAGAIN; 600 goto err_tree_mutex_unlock; 601 } 602 603 if (xrcd && cmd.oflags & O_EXCL) { 604 ret = -EINVAL; 605 goto err_tree_mutex_unlock; 606 } 607 } 608 609 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs, 610 &ib_dev); 611 if (IS_ERR(obj)) { 612 ret = PTR_ERR(obj); 613 goto err_tree_mutex_unlock; 614 } 615 616 if (!xrcd) { 617 xrcd = ib_dev->ops.alloc_xrcd(ib_dev, &attrs->driver_udata); 618 if (IS_ERR(xrcd)) { 619 ret = PTR_ERR(xrcd); 620 goto err; 621 } 622 623 xrcd->inode = inode; 624 xrcd->device = ib_dev; 625 atomic_set(&xrcd->usecnt, 0); 626 mutex_init(&xrcd->tgt_qp_mutex); 627 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 628 new_xrcd = 1; 629 } 630 631 atomic_set(&obj->refcnt, 0); 632 obj->uobject.object = xrcd; 633 memset(&resp, 0, sizeof resp); 634 resp.xrcd_handle = obj->uobject.id; 635 636 if (inode) { 637 if (new_xrcd) { 638 /* create new inode/xrcd table entry */ 639 ret = xrcd_table_insert(ibudev, inode, xrcd); 640 if (ret) 641 goto err_dealloc_xrcd; 642 } 643 atomic_inc(&xrcd->usecnt); 644 } 645 646 ret = uverbs_response(attrs, &resp, sizeof(resp)); 647 if (ret) 648 goto err_copy; 649 650 if (f.file) 651 fdput(f); 652 653 mutex_unlock(&ibudev->xrcd_tree_mutex); 654 655 rdma_alloc_commit_uobject(&obj->uobject, attrs); 656 return 0; 657 658 err_copy: 659 if (inode) { 660 if (new_xrcd) 661 xrcd_table_delete(ibudev, inode); 662 atomic_dec(&xrcd->usecnt); 663 } 664 665 err_dealloc_xrcd: 666 ib_dealloc_xrcd(xrcd, uverbs_get_cleared_udata(attrs)); 667 668 err: 669 uobj_alloc_abort(&obj->uobject, attrs); 670 671 err_tree_mutex_unlock: 672 if (f.file) 673 fdput(f); 674 675 mutex_unlock(&ibudev->xrcd_tree_mutex); 676 677 return ret; 678 } 679 680 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) 681 { 682 struct ib_uverbs_close_xrcd cmd; 683 int ret; 684 685 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 686 if (ret) 687 return ret; 688 689 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); 690 } 691 692 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, 693 enum rdma_remove_reason why, 694 struct uverbs_attr_bundle *attrs) 695 { 696 struct inode *inode; 697 int ret; 698 struct ib_uverbs_device *dev = attrs->ufile->device; 699 700 inode = xrcd->inode; 701 if (inode && !atomic_dec_and_test(&xrcd->usecnt)) 702 return 0; 703 704 ret = ib_dealloc_xrcd(xrcd, &attrs->driver_udata); 705 706 if (ib_is_destroy_retryable(ret, why, uobject)) { 707 atomic_inc(&xrcd->usecnt); 708 return ret; 709 } 710 711 if (inode) 712 xrcd_table_delete(dev, inode); 713 714 return ret; 715 } 716 717 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) 718 { 719 struct ib_uverbs_reg_mr cmd; 720 struct ib_uverbs_reg_mr_resp resp; 721 struct ib_uobject *uobj; 722 struct ib_pd *pd; 723 struct ib_mr *mr; 724 int ret; 725 struct ib_device *ib_dev; 726 727 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 728 if (ret) 729 return ret; 730 731 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 732 return -EINVAL; 733 734 ret = ib_check_mr_access(cmd.access_flags); 735 if (ret) 736 return ret; 737 738 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 739 if (IS_ERR(uobj)) 740 return PTR_ERR(uobj); 741 742 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 743 if (!pd) { 744 ret = -EINVAL; 745 goto err_free; 746 } 747 748 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) { 749 if (!(pd->device->attrs.device_cap_flags & 750 IB_DEVICE_ON_DEMAND_PAGING)) { 751 pr_debug("ODP support not available\n"); 752 ret = -EINVAL; 753 goto err_put; 754 } 755 } 756 757 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 758 cmd.access_flags, 759 &attrs->driver_udata); 760 if (IS_ERR(mr)) { 761 ret = PTR_ERR(mr); 762 goto err_put; 763 } 764 765 mr->device = pd->device; 766 mr->pd = pd; 767 mr->type = IB_MR_TYPE_USER; 768 mr->dm = NULL; 769 mr->sig_attrs = NULL; 770 mr->uobject = uobj; 771 atomic_inc(&pd->usecnt); 772 mr->res.type = RDMA_RESTRACK_MR; 773 rdma_restrack_uadd(&mr->res); 774 775 uobj->object = mr; 776 777 memset(&resp, 0, sizeof resp); 778 resp.lkey = mr->lkey; 779 resp.rkey = mr->rkey; 780 resp.mr_handle = uobj->id; 781 782 ret = uverbs_response(attrs, &resp, sizeof(resp)); 783 if (ret) 784 goto err_copy; 785 786 uobj_put_obj_read(pd); 787 788 rdma_alloc_commit_uobject(uobj, attrs); 789 return 0; 790 791 err_copy: 792 ib_dereg_mr_user(mr, uverbs_get_cleared_udata(attrs)); 793 794 err_put: 795 uobj_put_obj_read(pd); 796 797 err_free: 798 uobj_alloc_abort(uobj, attrs); 799 return ret; 800 } 801 802 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 803 { 804 struct ib_uverbs_rereg_mr cmd; 805 struct ib_uverbs_rereg_mr_resp resp; 806 struct ib_pd *pd = NULL; 807 struct ib_mr *mr; 808 struct ib_pd *old_pd; 809 int ret; 810 struct ib_uobject *uobj; 811 812 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 813 if (ret) 814 return ret; 815 816 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) 817 return -EINVAL; 818 819 if ((cmd.flags & IB_MR_REREG_TRANS) && 820 (!cmd.start || !cmd.hca_va || 0 >= cmd.length || 821 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) 822 return -EINVAL; 823 824 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 825 if (IS_ERR(uobj)) 826 return PTR_ERR(uobj); 827 828 mr = uobj->object; 829 830 if (mr->dm) { 831 ret = -EINVAL; 832 goto put_uobjs; 833 } 834 835 if (cmd.flags & IB_MR_REREG_ACCESS) { 836 ret = ib_check_mr_access(cmd.access_flags); 837 if (ret) 838 goto put_uobjs; 839 } 840 841 if (cmd.flags & IB_MR_REREG_PD) { 842 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 843 attrs); 844 if (!pd) { 845 ret = -EINVAL; 846 goto put_uobjs; 847 } 848 } 849 850 old_pd = mr->pd; 851 ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start, 852 cmd.length, cmd.hca_va, 853 cmd.access_flags, pd, 854 &attrs->driver_udata); 855 if (ret) 856 goto put_uobj_pd; 857 858 if (cmd.flags & IB_MR_REREG_PD) { 859 atomic_inc(&pd->usecnt); 860 mr->pd = pd; 861 atomic_dec(&old_pd->usecnt); 862 } 863 864 memset(&resp, 0, sizeof(resp)); 865 resp.lkey = mr->lkey; 866 resp.rkey = mr->rkey; 867 868 ret = uverbs_response(attrs, &resp, sizeof(resp)); 869 870 put_uobj_pd: 871 if (cmd.flags & IB_MR_REREG_PD) 872 uobj_put_obj_read(pd); 873 874 put_uobjs: 875 uobj_put_write(uobj); 876 877 return ret; 878 } 879 880 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) 881 { 882 struct ib_uverbs_dereg_mr cmd; 883 int ret; 884 885 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 886 if (ret) 887 return ret; 888 889 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 890 } 891 892 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 893 { 894 struct ib_uverbs_alloc_mw cmd; 895 struct ib_uverbs_alloc_mw_resp resp; 896 struct ib_uobject *uobj; 897 struct ib_pd *pd; 898 struct ib_mw *mw; 899 int ret; 900 struct ib_device *ib_dev; 901 902 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 903 if (ret) 904 return ret; 905 906 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 907 if (IS_ERR(uobj)) 908 return PTR_ERR(uobj); 909 910 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 911 if (!pd) { 912 ret = -EINVAL; 913 goto err_free; 914 } 915 916 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 917 ret = -EINVAL; 918 goto err_put; 919 } 920 921 mw = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata); 922 if (IS_ERR(mw)) { 923 ret = PTR_ERR(mw); 924 goto err_put; 925 } 926 927 mw->device = pd->device; 928 mw->pd = pd; 929 mw->uobject = uobj; 930 atomic_inc(&pd->usecnt); 931 932 uobj->object = mw; 933 934 memset(&resp, 0, sizeof(resp)); 935 resp.rkey = mw->rkey; 936 resp.mw_handle = uobj->id; 937 938 ret = uverbs_response(attrs, &resp, sizeof(resp)); 939 if (ret) 940 goto err_copy; 941 942 uobj_put_obj_read(pd); 943 rdma_alloc_commit_uobject(uobj, attrs); 944 return 0; 945 946 err_copy: 947 uverbs_dealloc_mw(mw); 948 err_put: 949 uobj_put_obj_read(pd); 950 err_free: 951 uobj_alloc_abort(uobj, attrs); 952 return ret; 953 } 954 955 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) 956 { 957 struct ib_uverbs_dealloc_mw cmd; 958 int ret; 959 960 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 961 if (ret) 962 return ret; 963 964 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); 965 } 966 967 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) 968 { 969 struct ib_uverbs_create_comp_channel cmd; 970 struct ib_uverbs_create_comp_channel_resp resp; 971 struct ib_uobject *uobj; 972 struct ib_uverbs_completion_event_file *ev_file; 973 struct ib_device *ib_dev; 974 int ret; 975 976 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 977 if (ret) 978 return ret; 979 980 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); 981 if (IS_ERR(uobj)) 982 return PTR_ERR(uobj); 983 984 resp.fd = uobj->id; 985 986 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, 987 uobj); 988 ib_uverbs_init_event_queue(&ev_file->ev_queue); 989 990 ret = uverbs_response(attrs, &resp, sizeof(resp)); 991 if (ret) { 992 uobj_alloc_abort(uobj, attrs); 993 return ret; 994 } 995 996 rdma_alloc_commit_uobject(uobj, attrs); 997 return 0; 998 } 999 1000 static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs, 1001 struct ib_uverbs_ex_create_cq *cmd) 1002 { 1003 struct ib_ucq_object *obj; 1004 struct ib_uverbs_completion_event_file *ev_file = NULL; 1005 struct ib_cq *cq; 1006 int ret; 1007 struct ib_uverbs_ex_create_cq_resp resp; 1008 struct ib_cq_init_attr attr = {}; 1009 struct ib_device *ib_dev; 1010 1011 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) 1012 return ERR_PTR(-EINVAL); 1013 1014 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, 1015 &ib_dev); 1016 if (IS_ERR(obj)) 1017 return obj; 1018 1019 if (cmd->comp_channel >= 0) { 1020 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); 1021 if (IS_ERR(ev_file)) { 1022 ret = PTR_ERR(ev_file); 1023 goto err; 1024 } 1025 } 1026 1027 obj->uevent.uobject.user_handle = cmd->user_handle; 1028 INIT_LIST_HEAD(&obj->comp_list); 1029 INIT_LIST_HEAD(&obj->uevent.event_list); 1030 1031 attr.cqe = cmd->cqe; 1032 attr.comp_vector = cmd->comp_vector; 1033 attr.flags = cmd->flags; 1034 1035 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 1036 if (!cq) { 1037 ret = -ENOMEM; 1038 goto err_file; 1039 } 1040 cq->device = ib_dev; 1041 cq->uobject = obj; 1042 cq->comp_handler = ib_uverbs_comp_handler; 1043 cq->event_handler = ib_uverbs_cq_event_handler; 1044 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 1045 atomic_set(&cq->usecnt, 0); 1046 1047 ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata); 1048 if (ret) 1049 goto err_free; 1050 1051 obj->uevent.uobject.object = cq; 1052 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1053 if (obj->uevent.event_file) 1054 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1055 1056 memset(&resp, 0, sizeof resp); 1057 resp.base.cq_handle = obj->uevent.uobject.id; 1058 resp.base.cqe = cq->cqe; 1059 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1060 1061 cq->res.type = RDMA_RESTRACK_CQ; 1062 rdma_restrack_uadd(&cq->res); 1063 1064 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1065 if (ret) 1066 goto err_cb; 1067 1068 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 1069 return obj; 1070 1071 err_cb: 1072 if (obj->uevent.event_file) 1073 uverbs_uobject_put(&obj->uevent.event_file->uobj); 1074 ib_destroy_cq_user(cq, uverbs_get_cleared_udata(attrs)); 1075 cq = NULL; 1076 err_free: 1077 kfree(cq); 1078 err_file: 1079 if (ev_file) 1080 ib_uverbs_release_ucq(ev_file, obj); 1081 1082 err: 1083 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1084 1085 return ERR_PTR(ret); 1086 } 1087 1088 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) 1089 { 1090 struct ib_uverbs_create_cq cmd; 1091 struct ib_uverbs_ex_create_cq cmd_ex; 1092 struct ib_ucq_object *obj; 1093 int ret; 1094 1095 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1096 if (ret) 1097 return ret; 1098 1099 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1100 cmd_ex.user_handle = cmd.user_handle; 1101 cmd_ex.cqe = cmd.cqe; 1102 cmd_ex.comp_vector = cmd.comp_vector; 1103 cmd_ex.comp_channel = cmd.comp_channel; 1104 1105 obj = create_cq(attrs, &cmd_ex); 1106 return PTR_ERR_OR_ZERO(obj); 1107 } 1108 1109 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) 1110 { 1111 struct ib_uverbs_ex_create_cq cmd; 1112 struct ib_ucq_object *obj; 1113 int ret; 1114 1115 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1116 if (ret) 1117 return ret; 1118 1119 if (cmd.comp_mask) 1120 return -EINVAL; 1121 1122 if (cmd.reserved) 1123 return -EINVAL; 1124 1125 obj = create_cq(attrs, &cmd); 1126 return PTR_ERR_OR_ZERO(obj); 1127 } 1128 1129 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) 1130 { 1131 struct ib_uverbs_resize_cq cmd; 1132 struct ib_uverbs_resize_cq_resp resp = {}; 1133 struct ib_cq *cq; 1134 int ret = -EINVAL; 1135 1136 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1137 if (ret) 1138 return ret; 1139 1140 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1141 if (!cq) 1142 return -EINVAL; 1143 1144 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); 1145 if (ret) 1146 goto out; 1147 1148 resp.cqe = cq->cqe; 1149 1150 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1151 out: 1152 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1153 UVERBS_LOOKUP_READ); 1154 1155 return ret; 1156 } 1157 1158 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1159 struct ib_wc *wc) 1160 { 1161 struct ib_uverbs_wc tmp; 1162 1163 tmp.wr_id = wc->wr_id; 1164 tmp.status = wc->status; 1165 tmp.opcode = wc->opcode; 1166 tmp.vendor_err = wc->vendor_err; 1167 tmp.byte_len = wc->byte_len; 1168 tmp.ex.imm_data = wc->ex.imm_data; 1169 tmp.qp_num = wc->qp->qp_num; 1170 tmp.src_qp = wc->src_qp; 1171 tmp.wc_flags = wc->wc_flags; 1172 tmp.pkey_index = wc->pkey_index; 1173 if (rdma_cap_opa_ah(ib_dev, wc->port_num)) 1174 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); 1175 else 1176 tmp.slid = ib_lid_cpu16(wc->slid); 1177 tmp.sl = wc->sl; 1178 tmp.dlid_path_bits = wc->dlid_path_bits; 1179 tmp.port_num = wc->port_num; 1180 tmp.reserved = 0; 1181 1182 if (copy_to_user(dest, &tmp, sizeof tmp)) 1183 return -EFAULT; 1184 1185 return 0; 1186 } 1187 1188 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1189 { 1190 struct ib_uverbs_poll_cq cmd; 1191 struct ib_uverbs_poll_cq_resp resp; 1192 u8 __user *header_ptr; 1193 u8 __user *data_ptr; 1194 struct ib_cq *cq; 1195 struct ib_wc wc; 1196 int ret; 1197 1198 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1199 if (ret) 1200 return ret; 1201 1202 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1203 if (!cq) 1204 return -EINVAL; 1205 1206 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1207 header_ptr = attrs->ucore.outbuf; 1208 data_ptr = header_ptr + sizeof resp; 1209 1210 memset(&resp, 0, sizeof resp); 1211 while (resp.count < cmd.ne) { 1212 ret = ib_poll_cq(cq, 1, &wc); 1213 if (ret < 0) 1214 goto out_put; 1215 if (!ret) 1216 break; 1217 1218 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1219 if (ret) 1220 goto out_put; 1221 1222 data_ptr += sizeof(struct ib_uverbs_wc); 1223 ++resp.count; 1224 } 1225 1226 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1227 ret = -EFAULT; 1228 goto out_put; 1229 } 1230 ret = 0; 1231 1232 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1233 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1234 1235 out_put: 1236 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1237 UVERBS_LOOKUP_READ); 1238 return ret; 1239 } 1240 1241 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1242 { 1243 struct ib_uverbs_req_notify_cq cmd; 1244 struct ib_cq *cq; 1245 int ret; 1246 1247 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1248 if (ret) 1249 return ret; 1250 1251 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1252 if (!cq) 1253 return -EINVAL; 1254 1255 ib_req_notify_cq(cq, cmd.solicited_only ? 1256 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1257 1258 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1259 UVERBS_LOOKUP_READ); 1260 return 0; 1261 } 1262 1263 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1264 { 1265 struct ib_uverbs_destroy_cq cmd; 1266 struct ib_uverbs_destroy_cq_resp resp; 1267 struct ib_uobject *uobj; 1268 struct ib_ucq_object *obj; 1269 int ret; 1270 1271 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1272 if (ret) 1273 return ret; 1274 1275 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1276 if (IS_ERR(uobj)) 1277 return PTR_ERR(uobj); 1278 1279 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject); 1280 memset(&resp, 0, sizeof(resp)); 1281 resp.comp_events_reported = obj->comp_events_reported; 1282 resp.async_events_reported = obj->uevent.events_reported; 1283 1284 uobj_put_destroy(uobj); 1285 1286 return uverbs_response(attrs, &resp, sizeof(resp)); 1287 } 1288 1289 static int create_qp(struct uverbs_attr_bundle *attrs, 1290 struct ib_uverbs_ex_create_qp *cmd) 1291 { 1292 struct ib_uqp_object *obj; 1293 struct ib_device *device; 1294 struct ib_pd *pd = NULL; 1295 struct ib_xrcd *xrcd = NULL; 1296 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1297 struct ib_cq *scq = NULL, *rcq = NULL; 1298 struct ib_srq *srq = NULL; 1299 struct ib_qp *qp; 1300 struct ib_qp_init_attr attr = {}; 1301 struct ib_uverbs_ex_create_qp_resp resp; 1302 int ret; 1303 struct ib_rwq_ind_table *ind_tbl = NULL; 1304 bool has_sq = true; 1305 struct ib_device *ib_dev; 1306 1307 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW)) 1308 return -EPERM; 1309 1310 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1311 &ib_dev); 1312 if (IS_ERR(obj)) 1313 return PTR_ERR(obj); 1314 obj->uxrcd = NULL; 1315 obj->uevent.uobject.user_handle = cmd->user_handle; 1316 mutex_init(&obj->mcast_lock); 1317 1318 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1319 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1320 UVERBS_OBJECT_RWQ_IND_TBL, 1321 cmd->rwq_ind_tbl_handle, attrs); 1322 if (!ind_tbl) { 1323 ret = -EINVAL; 1324 goto err_put; 1325 } 1326 1327 attr.rwq_ind_tbl = ind_tbl; 1328 } 1329 1330 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1331 ret = -EINVAL; 1332 goto err_put; 1333 } 1334 1335 if (ind_tbl && !cmd->max_send_wr) 1336 has_sq = false; 1337 1338 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1339 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1340 attrs); 1341 1342 if (IS_ERR(xrcd_uobj)) { 1343 ret = -EINVAL; 1344 goto err_put; 1345 } 1346 1347 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1348 if (!xrcd) { 1349 ret = -EINVAL; 1350 goto err_put; 1351 } 1352 device = xrcd->device; 1353 } else { 1354 if (cmd->qp_type == IB_QPT_XRC_INI) { 1355 cmd->max_recv_wr = 0; 1356 cmd->max_recv_sge = 0; 1357 } else { 1358 if (cmd->is_srq) { 1359 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1360 cmd->srq_handle, attrs); 1361 if (!srq || srq->srq_type == IB_SRQT_XRC) { 1362 ret = -EINVAL; 1363 goto err_put; 1364 } 1365 } 1366 1367 if (!ind_tbl) { 1368 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1369 rcq = uobj_get_obj_read( 1370 cq, UVERBS_OBJECT_CQ, 1371 cmd->recv_cq_handle, attrs); 1372 if (!rcq) { 1373 ret = -EINVAL; 1374 goto err_put; 1375 } 1376 } 1377 } 1378 } 1379 1380 if (has_sq) 1381 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1382 cmd->send_cq_handle, attrs); 1383 if (!ind_tbl) 1384 rcq = rcq ?: scq; 1385 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1386 attrs); 1387 if (!pd || (!scq && has_sq)) { 1388 ret = -EINVAL; 1389 goto err_put; 1390 } 1391 1392 device = pd->device; 1393 } 1394 1395 attr.event_handler = ib_uverbs_qp_event_handler; 1396 attr.send_cq = scq; 1397 attr.recv_cq = rcq; 1398 attr.srq = srq; 1399 attr.xrcd = xrcd; 1400 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1401 IB_SIGNAL_REQ_WR; 1402 attr.qp_type = cmd->qp_type; 1403 attr.create_flags = 0; 1404 1405 attr.cap.max_send_wr = cmd->max_send_wr; 1406 attr.cap.max_recv_wr = cmd->max_recv_wr; 1407 attr.cap.max_send_sge = cmd->max_send_sge; 1408 attr.cap.max_recv_sge = cmd->max_recv_sge; 1409 attr.cap.max_inline_data = cmd->max_inline_data; 1410 1411 INIT_LIST_HEAD(&obj->uevent.event_list); 1412 INIT_LIST_HEAD(&obj->mcast_list); 1413 1414 attr.create_flags = cmd->create_flags; 1415 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1416 IB_QP_CREATE_CROSS_CHANNEL | 1417 IB_QP_CREATE_MANAGED_SEND | 1418 IB_QP_CREATE_MANAGED_RECV | 1419 IB_QP_CREATE_SCATTER_FCS | 1420 IB_QP_CREATE_CVLAN_STRIPPING | 1421 IB_QP_CREATE_SOURCE_QPN | 1422 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1423 ret = -EINVAL; 1424 goto err_put; 1425 } 1426 1427 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1428 if (!capable(CAP_NET_RAW)) { 1429 ret = -EPERM; 1430 goto err_put; 1431 } 1432 1433 attr.source_qpn = cmd->source_qpn; 1434 } 1435 1436 if (cmd->qp_type == IB_QPT_XRC_TGT) 1437 qp = ib_create_qp(pd, &attr); 1438 else 1439 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata, 1440 obj); 1441 1442 if (IS_ERR(qp)) { 1443 ret = PTR_ERR(qp); 1444 goto err_put; 1445 } 1446 1447 if (cmd->qp_type != IB_QPT_XRC_TGT) { 1448 ret = ib_create_qp_security(qp, device); 1449 if (ret) 1450 goto err_cb; 1451 1452 atomic_inc(&pd->usecnt); 1453 if (attr.send_cq) 1454 atomic_inc(&attr.send_cq->usecnt); 1455 if (attr.recv_cq) 1456 atomic_inc(&attr.recv_cq->usecnt); 1457 if (attr.srq) 1458 atomic_inc(&attr.srq->usecnt); 1459 if (ind_tbl) 1460 atomic_inc(&ind_tbl->usecnt); 1461 } else { 1462 /* It is done in _ib_create_qp for other QP types */ 1463 qp->uobject = obj; 1464 } 1465 1466 obj->uevent.uobject.object = qp; 1467 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1468 if (obj->uevent.event_file) 1469 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1470 1471 memset(&resp, 0, sizeof resp); 1472 resp.base.qpn = qp->qp_num; 1473 resp.base.qp_handle = obj->uevent.uobject.id; 1474 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1475 resp.base.max_send_sge = attr.cap.max_send_sge; 1476 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1477 resp.base.max_send_wr = attr.cap.max_send_wr; 1478 resp.base.max_inline_data = attr.cap.max_inline_data; 1479 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1480 1481 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1482 if (ret) 1483 goto err_uevent; 1484 1485 if (xrcd) { 1486 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1487 uobject); 1488 atomic_inc(&obj->uxrcd->refcnt); 1489 uobj_put_read(xrcd_uobj); 1490 } 1491 1492 if (pd) 1493 uobj_put_obj_read(pd); 1494 if (scq) 1495 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1496 UVERBS_LOOKUP_READ); 1497 if (rcq && rcq != scq) 1498 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1499 UVERBS_LOOKUP_READ); 1500 if (srq) 1501 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1502 UVERBS_LOOKUP_READ); 1503 if (ind_tbl) 1504 uobj_put_obj_read(ind_tbl); 1505 1506 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 1507 return 0; 1508 err_uevent: 1509 if (obj->uevent.event_file) 1510 uverbs_uobject_put(&obj->uevent.event_file->uobj); 1511 err_cb: 1512 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs)); 1513 1514 err_put: 1515 if (!IS_ERR(xrcd_uobj)) 1516 uobj_put_read(xrcd_uobj); 1517 if (pd) 1518 uobj_put_obj_read(pd); 1519 if (scq) 1520 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1521 UVERBS_LOOKUP_READ); 1522 if (rcq && rcq != scq) 1523 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1524 UVERBS_LOOKUP_READ); 1525 if (srq) 1526 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1527 UVERBS_LOOKUP_READ); 1528 if (ind_tbl) 1529 uobj_put_obj_read(ind_tbl); 1530 1531 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1532 return ret; 1533 } 1534 1535 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1536 { 1537 struct ib_uverbs_create_qp cmd; 1538 struct ib_uverbs_ex_create_qp cmd_ex; 1539 int ret; 1540 1541 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1542 if (ret) 1543 return ret; 1544 1545 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1546 cmd_ex.user_handle = cmd.user_handle; 1547 cmd_ex.pd_handle = cmd.pd_handle; 1548 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1549 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1550 cmd_ex.srq_handle = cmd.srq_handle; 1551 cmd_ex.max_send_wr = cmd.max_send_wr; 1552 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1553 cmd_ex.max_send_sge = cmd.max_send_sge; 1554 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1555 cmd_ex.max_inline_data = cmd.max_inline_data; 1556 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1557 cmd_ex.qp_type = cmd.qp_type; 1558 cmd_ex.is_srq = cmd.is_srq; 1559 1560 return create_qp(attrs, &cmd_ex); 1561 } 1562 1563 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1564 { 1565 struct ib_uverbs_ex_create_qp cmd; 1566 int ret; 1567 1568 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1569 if (ret) 1570 return ret; 1571 1572 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1573 return -EINVAL; 1574 1575 if (cmd.reserved) 1576 return -EINVAL; 1577 1578 return create_qp(attrs, &cmd); 1579 } 1580 1581 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1582 { 1583 struct ib_uverbs_open_qp cmd; 1584 struct ib_uverbs_create_qp_resp resp; 1585 struct ib_uqp_object *obj; 1586 struct ib_xrcd *xrcd; 1587 struct ib_uobject *uninitialized_var(xrcd_uobj); 1588 struct ib_qp *qp; 1589 struct ib_qp_open_attr attr = {}; 1590 int ret; 1591 struct ib_device *ib_dev; 1592 1593 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1594 if (ret) 1595 return ret; 1596 1597 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1598 &ib_dev); 1599 if (IS_ERR(obj)) 1600 return PTR_ERR(obj); 1601 1602 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1603 if (IS_ERR(xrcd_uobj)) { 1604 ret = -EINVAL; 1605 goto err_put; 1606 } 1607 1608 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1609 if (!xrcd) { 1610 ret = -EINVAL; 1611 goto err_xrcd; 1612 } 1613 1614 attr.event_handler = ib_uverbs_qp_event_handler; 1615 attr.qp_num = cmd.qpn; 1616 attr.qp_type = cmd.qp_type; 1617 1618 INIT_LIST_HEAD(&obj->uevent.event_list); 1619 INIT_LIST_HEAD(&obj->mcast_list); 1620 1621 qp = ib_open_qp(xrcd, &attr); 1622 if (IS_ERR(qp)) { 1623 ret = PTR_ERR(qp); 1624 goto err_xrcd; 1625 } 1626 1627 obj->uevent.uobject.object = qp; 1628 obj->uevent.uobject.user_handle = cmd.user_handle; 1629 1630 memset(&resp, 0, sizeof resp); 1631 resp.qpn = qp->qp_num; 1632 resp.qp_handle = obj->uevent.uobject.id; 1633 1634 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1635 if (ret) 1636 goto err_destroy; 1637 1638 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1639 atomic_inc(&obj->uxrcd->refcnt); 1640 qp->uobject = obj; 1641 uobj_put_read(xrcd_uobj); 1642 1643 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 1644 return 0; 1645 1646 err_destroy: 1647 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs)); 1648 err_xrcd: 1649 uobj_put_read(xrcd_uobj); 1650 err_put: 1651 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1652 return ret; 1653 } 1654 1655 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, 1656 struct rdma_ah_attr *rdma_attr) 1657 { 1658 const struct ib_global_route *grh; 1659 1660 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr); 1661 uverb_attr->sl = rdma_ah_get_sl(rdma_attr); 1662 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr); 1663 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr); 1664 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) & 1665 IB_AH_GRH); 1666 if (uverb_attr->is_global) { 1667 grh = rdma_ah_read_grh(rdma_attr); 1668 memcpy(uverb_attr->dgid, grh->dgid.raw, 16); 1669 uverb_attr->flow_label = grh->flow_label; 1670 uverb_attr->sgid_index = grh->sgid_index; 1671 uverb_attr->hop_limit = grh->hop_limit; 1672 uverb_attr->traffic_class = grh->traffic_class; 1673 } 1674 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr); 1675 } 1676 1677 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) 1678 { 1679 struct ib_uverbs_query_qp cmd; 1680 struct ib_uverbs_query_qp_resp resp; 1681 struct ib_qp *qp; 1682 struct ib_qp_attr *attr; 1683 struct ib_qp_init_attr *init_attr; 1684 int ret; 1685 1686 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1687 if (ret) 1688 return ret; 1689 1690 attr = kmalloc(sizeof *attr, GFP_KERNEL); 1691 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 1692 if (!attr || !init_attr) { 1693 ret = -ENOMEM; 1694 goto out; 1695 } 1696 1697 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1698 if (!qp) { 1699 ret = -EINVAL; 1700 goto out; 1701 } 1702 1703 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1704 1705 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1706 UVERBS_LOOKUP_READ); 1707 1708 if (ret) 1709 goto out; 1710 1711 memset(&resp, 0, sizeof resp); 1712 1713 resp.qp_state = attr->qp_state; 1714 resp.cur_qp_state = attr->cur_qp_state; 1715 resp.path_mtu = attr->path_mtu; 1716 resp.path_mig_state = attr->path_mig_state; 1717 resp.qkey = attr->qkey; 1718 resp.rq_psn = attr->rq_psn; 1719 resp.sq_psn = attr->sq_psn; 1720 resp.dest_qp_num = attr->dest_qp_num; 1721 resp.qp_access_flags = attr->qp_access_flags; 1722 resp.pkey_index = attr->pkey_index; 1723 resp.alt_pkey_index = attr->alt_pkey_index; 1724 resp.sq_draining = attr->sq_draining; 1725 resp.max_rd_atomic = attr->max_rd_atomic; 1726 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1727 resp.min_rnr_timer = attr->min_rnr_timer; 1728 resp.port_num = attr->port_num; 1729 resp.timeout = attr->timeout; 1730 resp.retry_cnt = attr->retry_cnt; 1731 resp.rnr_retry = attr->rnr_retry; 1732 resp.alt_port_num = attr->alt_port_num; 1733 resp.alt_timeout = attr->alt_timeout; 1734 1735 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1736 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1737 1738 resp.max_send_wr = init_attr->cap.max_send_wr; 1739 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1740 resp.max_send_sge = init_attr->cap.max_send_sge; 1741 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1742 resp.max_inline_data = init_attr->cap.max_inline_data; 1743 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1744 1745 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1746 1747 out: 1748 kfree(attr); 1749 kfree(init_attr); 1750 1751 return ret; 1752 } 1753 1754 /* Remove ignored fields set in the attribute mask */ 1755 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1756 { 1757 switch (qp_type) { 1758 case IB_QPT_XRC_INI: 1759 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1760 case IB_QPT_XRC_TGT: 1761 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1762 IB_QP_RNR_RETRY); 1763 default: 1764 return mask; 1765 } 1766 } 1767 1768 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1769 struct rdma_ah_attr *rdma_attr, 1770 struct ib_uverbs_qp_dest *uverb_attr) 1771 { 1772 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); 1773 if (uverb_attr->is_global) { 1774 rdma_ah_set_grh(rdma_attr, NULL, 1775 uverb_attr->flow_label, 1776 uverb_attr->sgid_index, 1777 uverb_attr->hop_limit, 1778 uverb_attr->traffic_class); 1779 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); 1780 } else { 1781 rdma_ah_set_ah_flags(rdma_attr, 0); 1782 } 1783 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); 1784 rdma_ah_set_sl(rdma_attr, uverb_attr->sl); 1785 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); 1786 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); 1787 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); 1788 rdma_ah_set_make_grd(rdma_attr, false); 1789 } 1790 1791 static int modify_qp(struct uverbs_attr_bundle *attrs, 1792 struct ib_uverbs_ex_modify_qp *cmd) 1793 { 1794 struct ib_qp_attr *attr; 1795 struct ib_qp *qp; 1796 int ret; 1797 1798 attr = kzalloc(sizeof(*attr), GFP_KERNEL); 1799 if (!attr) 1800 return -ENOMEM; 1801 1802 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1803 attrs); 1804 if (!qp) { 1805 ret = -EINVAL; 1806 goto out; 1807 } 1808 1809 if ((cmd->base.attr_mask & IB_QP_PORT) && 1810 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1811 ret = -EINVAL; 1812 goto release_qp; 1813 } 1814 1815 if ((cmd->base.attr_mask & IB_QP_AV)) { 1816 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1817 ret = -EINVAL; 1818 goto release_qp; 1819 } 1820 1821 if (cmd->base.attr_mask & IB_QP_STATE && 1822 cmd->base.qp_state == IB_QPS_RTR) { 1823 /* We are in INIT->RTR TRANSITION (if we are not, 1824 * this transition will be rejected in subsequent checks). 1825 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1826 * but the IB_QP_STATE flag is required. 1827 * 1828 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1829 * when IB_QP_AV is set, has required inclusion of a valid 1830 * port number in the primary AV. (AVs are created and handled 1831 * differently for infiniband and ethernet (RoCE) ports). 1832 * 1833 * Check the port number included in the primary AV against 1834 * the port number in the qp struct, which was set (and saved) 1835 * in the RST->INIT transition. 1836 */ 1837 if (cmd->base.dest.port_num != qp->real_qp->port) { 1838 ret = -EINVAL; 1839 goto release_qp; 1840 } 1841 } else { 1842 /* We are in SQD->SQD. (If we are not, this transition will 1843 * be rejected later in the verbs layer checks). 1844 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1845 * together in the SQD->SQD transition. 1846 * 1847 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1848 * verbs layer driver does not track primary port changes 1849 * resulting from path migration. Thus, in SQD, if the primary 1850 * AV is modified, the primary port should also be modified). 1851 * 1852 * Note that in this transition, the IB_QP_STATE flag 1853 * is not allowed. 1854 */ 1855 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1856 == (IB_QP_AV | IB_QP_PORT)) && 1857 cmd->base.port_num != cmd->base.dest.port_num) { 1858 ret = -EINVAL; 1859 goto release_qp; 1860 } 1861 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1862 == IB_QP_AV) { 1863 cmd->base.attr_mask |= IB_QP_PORT; 1864 cmd->base.port_num = cmd->base.dest.port_num; 1865 } 1866 } 1867 } 1868 1869 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1870 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1871 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1872 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1873 ret = -EINVAL; 1874 goto release_qp; 1875 } 1876 1877 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1878 cmd->base.cur_qp_state > IB_QPS_ERR) || 1879 (cmd->base.attr_mask & IB_QP_STATE && 1880 cmd->base.qp_state > IB_QPS_ERR)) { 1881 ret = -EINVAL; 1882 goto release_qp; 1883 } 1884 1885 if (cmd->base.attr_mask & IB_QP_STATE) 1886 attr->qp_state = cmd->base.qp_state; 1887 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1888 attr->cur_qp_state = cmd->base.cur_qp_state; 1889 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1890 attr->path_mtu = cmd->base.path_mtu; 1891 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1892 attr->path_mig_state = cmd->base.path_mig_state; 1893 if (cmd->base.attr_mask & IB_QP_QKEY) 1894 attr->qkey = cmd->base.qkey; 1895 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1896 attr->rq_psn = cmd->base.rq_psn; 1897 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1898 attr->sq_psn = cmd->base.sq_psn; 1899 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1900 attr->dest_qp_num = cmd->base.dest_qp_num; 1901 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1902 attr->qp_access_flags = cmd->base.qp_access_flags; 1903 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1904 attr->pkey_index = cmd->base.pkey_index; 1905 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1906 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1907 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1908 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1909 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1910 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1911 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1912 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1913 if (cmd->base.attr_mask & IB_QP_PORT) 1914 attr->port_num = cmd->base.port_num; 1915 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1916 attr->timeout = cmd->base.timeout; 1917 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1918 attr->retry_cnt = cmd->base.retry_cnt; 1919 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1920 attr->rnr_retry = cmd->base.rnr_retry; 1921 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1922 attr->alt_port_num = cmd->base.alt_port_num; 1923 attr->alt_timeout = cmd->base.alt_timeout; 1924 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1925 } 1926 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1927 attr->rate_limit = cmd->rate_limit; 1928 1929 if (cmd->base.attr_mask & IB_QP_AV) 1930 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1931 &cmd->base.dest); 1932 1933 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1934 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1935 &cmd->base.alt_dest); 1936 1937 ret = ib_modify_qp_with_udata(qp, attr, 1938 modify_qp_mask(qp->qp_type, 1939 cmd->base.attr_mask), 1940 &attrs->driver_udata); 1941 1942 release_qp: 1943 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1944 UVERBS_LOOKUP_READ); 1945 out: 1946 kfree(attr); 1947 1948 return ret; 1949 } 1950 1951 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1952 { 1953 struct ib_uverbs_ex_modify_qp cmd; 1954 int ret; 1955 1956 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1957 if (ret) 1958 return ret; 1959 1960 if (cmd.base.attr_mask & 1961 ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1)) 1962 return -EOPNOTSUPP; 1963 1964 return modify_qp(attrs, &cmd); 1965 } 1966 1967 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1968 { 1969 struct ib_uverbs_ex_modify_qp cmd; 1970 struct ib_uverbs_ex_modify_qp_resp resp = { 1971 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1972 }; 1973 int ret; 1974 1975 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1976 if (ret) 1977 return ret; 1978 1979 /* 1980 * Last bit is reserved for extending the attr_mask by 1981 * using another field. 1982 */ 1983 BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31)); 1984 1985 if (cmd.base.attr_mask & 1986 ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1)) 1987 return -EOPNOTSUPP; 1988 1989 ret = modify_qp(attrs, &cmd); 1990 if (ret) 1991 return ret; 1992 1993 return uverbs_response(attrs, &resp, sizeof(resp)); 1994 } 1995 1996 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1997 { 1998 struct ib_uverbs_destroy_qp cmd; 1999 struct ib_uverbs_destroy_qp_resp resp; 2000 struct ib_uobject *uobj; 2001 struct ib_uqp_object *obj; 2002 int ret; 2003 2004 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2005 if (ret) 2006 return ret; 2007 2008 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2009 if (IS_ERR(uobj)) 2010 return PTR_ERR(uobj); 2011 2012 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 2013 memset(&resp, 0, sizeof(resp)); 2014 resp.events_reported = obj->uevent.events_reported; 2015 2016 uobj_put_destroy(uobj); 2017 2018 return uverbs_response(attrs, &resp, sizeof(resp)); 2019 } 2020 2021 static void *alloc_wr(size_t wr_size, __u32 num_sge) 2022 { 2023 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) / 2024 sizeof (struct ib_sge)) 2025 return NULL; 2026 2027 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) + 2028 num_sge * sizeof (struct ib_sge), GFP_KERNEL); 2029 } 2030 2031 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 2032 { 2033 struct ib_uverbs_post_send cmd; 2034 struct ib_uverbs_post_send_resp resp; 2035 struct ib_uverbs_send_wr *user_wr; 2036 struct ib_send_wr *wr = NULL, *last, *next; 2037 const struct ib_send_wr *bad_wr; 2038 struct ib_qp *qp; 2039 int i, sg_ind; 2040 int is_ud; 2041 int ret, ret2; 2042 size_t next_size; 2043 const struct ib_sge __user *sgls; 2044 const void __user *wqes; 2045 struct uverbs_req_iter iter; 2046 2047 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2048 if (ret) 2049 return ret; 2050 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count); 2051 if (IS_ERR(wqes)) 2052 return PTR_ERR(wqes); 2053 sgls = uverbs_request_next_ptr( 2054 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge)); 2055 if (IS_ERR(sgls)) 2056 return PTR_ERR(sgls); 2057 ret = uverbs_request_finish(&iter); 2058 if (ret) 2059 return ret; 2060 2061 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2062 if (!user_wr) 2063 return -ENOMEM; 2064 2065 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2066 if (!qp) { 2067 ret = -EINVAL; 2068 goto out; 2069 } 2070 2071 is_ud = qp->qp_type == IB_QPT_UD; 2072 sg_ind = 0; 2073 last = NULL; 2074 for (i = 0; i < cmd.wr_count; ++i) { 2075 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2076 cmd.wqe_size)) { 2077 ret = -EFAULT; 2078 goto out_put; 2079 } 2080 2081 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2082 ret = -EINVAL; 2083 goto out_put; 2084 } 2085 2086 if (is_ud) { 2087 struct ib_ud_wr *ud; 2088 2089 if (user_wr->opcode != IB_WR_SEND && 2090 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2091 ret = -EINVAL; 2092 goto out_put; 2093 } 2094 2095 next_size = sizeof(*ud); 2096 ud = alloc_wr(next_size, user_wr->num_sge); 2097 if (!ud) { 2098 ret = -ENOMEM; 2099 goto out_put; 2100 } 2101 2102 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2103 user_wr->wr.ud.ah, attrs); 2104 if (!ud->ah) { 2105 kfree(ud); 2106 ret = -EINVAL; 2107 goto out_put; 2108 } 2109 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2110 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2111 2112 next = &ud->wr; 2113 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2114 user_wr->opcode == IB_WR_RDMA_WRITE || 2115 user_wr->opcode == IB_WR_RDMA_READ) { 2116 struct ib_rdma_wr *rdma; 2117 2118 next_size = sizeof(*rdma); 2119 rdma = alloc_wr(next_size, user_wr->num_sge); 2120 if (!rdma) { 2121 ret = -ENOMEM; 2122 goto out_put; 2123 } 2124 2125 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2126 rdma->rkey = user_wr->wr.rdma.rkey; 2127 2128 next = &rdma->wr; 2129 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2130 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2131 struct ib_atomic_wr *atomic; 2132 2133 next_size = sizeof(*atomic); 2134 atomic = alloc_wr(next_size, user_wr->num_sge); 2135 if (!atomic) { 2136 ret = -ENOMEM; 2137 goto out_put; 2138 } 2139 2140 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2141 atomic->compare_add = user_wr->wr.atomic.compare_add; 2142 atomic->swap = user_wr->wr.atomic.swap; 2143 atomic->rkey = user_wr->wr.atomic.rkey; 2144 2145 next = &atomic->wr; 2146 } else if (user_wr->opcode == IB_WR_SEND || 2147 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2148 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2149 next_size = sizeof(*next); 2150 next = alloc_wr(next_size, user_wr->num_sge); 2151 if (!next) { 2152 ret = -ENOMEM; 2153 goto out_put; 2154 } 2155 } else { 2156 ret = -EINVAL; 2157 goto out_put; 2158 } 2159 2160 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2161 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2162 next->ex.imm_data = 2163 (__be32 __force) user_wr->ex.imm_data; 2164 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2165 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2166 } 2167 2168 if (!last) 2169 wr = next; 2170 else 2171 last->next = next; 2172 last = next; 2173 2174 next->next = NULL; 2175 next->wr_id = user_wr->wr_id; 2176 next->num_sge = user_wr->num_sge; 2177 next->opcode = user_wr->opcode; 2178 next->send_flags = user_wr->send_flags; 2179 2180 if (next->num_sge) { 2181 next->sg_list = (void *) next + 2182 ALIGN(next_size, sizeof(struct ib_sge)); 2183 if (copy_from_user(next->sg_list, sgls + sg_ind, 2184 next->num_sge * 2185 sizeof(struct ib_sge))) { 2186 ret = -EFAULT; 2187 goto out_put; 2188 } 2189 sg_ind += next->num_sge; 2190 } else 2191 next->sg_list = NULL; 2192 } 2193 2194 resp.bad_wr = 0; 2195 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2196 if (ret) 2197 for (next = wr; next; next = next->next) { 2198 ++resp.bad_wr; 2199 if (next == bad_wr) 2200 break; 2201 } 2202 2203 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2204 if (ret2) 2205 ret = ret2; 2206 2207 out_put: 2208 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2209 UVERBS_LOOKUP_READ); 2210 2211 while (wr) { 2212 if (is_ud && ud_wr(wr)->ah) 2213 uobj_put_obj_read(ud_wr(wr)->ah); 2214 next = wr->next; 2215 kfree(wr); 2216 wr = next; 2217 } 2218 2219 out: 2220 kfree(user_wr); 2221 2222 return ret; 2223 } 2224 2225 static struct ib_recv_wr * 2226 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2227 u32 wqe_size, u32 sge_count) 2228 { 2229 struct ib_uverbs_recv_wr *user_wr; 2230 struct ib_recv_wr *wr = NULL, *last, *next; 2231 int sg_ind; 2232 int i; 2233 int ret; 2234 const struct ib_sge __user *sgls; 2235 const void __user *wqes; 2236 2237 if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) 2238 return ERR_PTR(-EINVAL); 2239 2240 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count); 2241 if (IS_ERR(wqes)) 2242 return ERR_CAST(wqes); 2243 sgls = uverbs_request_next_ptr( 2244 iter, sge_count * sizeof(struct ib_uverbs_sge)); 2245 if (IS_ERR(sgls)) 2246 return ERR_CAST(sgls); 2247 ret = uverbs_request_finish(iter); 2248 if (ret) 2249 return ERR_PTR(ret); 2250 2251 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2252 if (!user_wr) 2253 return ERR_PTR(-ENOMEM); 2254 2255 sg_ind = 0; 2256 last = NULL; 2257 for (i = 0; i < wr_count; ++i) { 2258 if (copy_from_user(user_wr, wqes + i * wqe_size, 2259 wqe_size)) { 2260 ret = -EFAULT; 2261 goto err; 2262 } 2263 2264 if (user_wr->num_sge + sg_ind > sge_count) { 2265 ret = -EINVAL; 2266 goto err; 2267 } 2268 2269 if (user_wr->num_sge >= 2270 (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) / 2271 sizeof (struct ib_sge)) { 2272 ret = -EINVAL; 2273 goto err; 2274 } 2275 2276 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + 2277 user_wr->num_sge * sizeof (struct ib_sge), 2278 GFP_KERNEL); 2279 if (!next) { 2280 ret = -ENOMEM; 2281 goto err; 2282 } 2283 2284 if (!last) 2285 wr = next; 2286 else 2287 last->next = next; 2288 last = next; 2289 2290 next->next = NULL; 2291 next->wr_id = user_wr->wr_id; 2292 next->num_sge = user_wr->num_sge; 2293 2294 if (next->num_sge) { 2295 next->sg_list = (void *) next + 2296 ALIGN(sizeof *next, sizeof (struct ib_sge)); 2297 if (copy_from_user(next->sg_list, sgls + sg_ind, 2298 next->num_sge * 2299 sizeof(struct ib_sge))) { 2300 ret = -EFAULT; 2301 goto err; 2302 } 2303 sg_ind += next->num_sge; 2304 } else 2305 next->sg_list = NULL; 2306 } 2307 2308 kfree(user_wr); 2309 return wr; 2310 2311 err: 2312 kfree(user_wr); 2313 2314 while (wr) { 2315 next = wr->next; 2316 kfree(wr); 2317 wr = next; 2318 } 2319 2320 return ERR_PTR(ret); 2321 } 2322 2323 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2324 { 2325 struct ib_uverbs_post_recv cmd; 2326 struct ib_uverbs_post_recv_resp resp; 2327 struct ib_recv_wr *wr, *next; 2328 const struct ib_recv_wr *bad_wr; 2329 struct ib_qp *qp; 2330 int ret, ret2; 2331 struct uverbs_req_iter iter; 2332 2333 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2334 if (ret) 2335 return ret; 2336 2337 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2338 cmd.sge_count); 2339 if (IS_ERR(wr)) 2340 return PTR_ERR(wr); 2341 2342 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2343 if (!qp) { 2344 ret = -EINVAL; 2345 goto out; 2346 } 2347 2348 resp.bad_wr = 0; 2349 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2350 2351 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2352 UVERBS_LOOKUP_READ); 2353 if (ret) { 2354 for (next = wr; next; next = next->next) { 2355 ++resp.bad_wr; 2356 if (next == bad_wr) 2357 break; 2358 } 2359 } 2360 2361 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2362 if (ret2) 2363 ret = ret2; 2364 out: 2365 while (wr) { 2366 next = wr->next; 2367 kfree(wr); 2368 wr = next; 2369 } 2370 2371 return ret; 2372 } 2373 2374 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2375 { 2376 struct ib_uverbs_post_srq_recv cmd; 2377 struct ib_uverbs_post_srq_recv_resp resp; 2378 struct ib_recv_wr *wr, *next; 2379 const struct ib_recv_wr *bad_wr; 2380 struct ib_srq *srq; 2381 int ret, ret2; 2382 struct uverbs_req_iter iter; 2383 2384 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2385 if (ret) 2386 return ret; 2387 2388 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2389 cmd.sge_count); 2390 if (IS_ERR(wr)) 2391 return PTR_ERR(wr); 2392 2393 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2394 if (!srq) { 2395 ret = -EINVAL; 2396 goto out; 2397 } 2398 2399 resp.bad_wr = 0; 2400 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2401 2402 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 2403 UVERBS_LOOKUP_READ); 2404 2405 if (ret) 2406 for (next = wr; next; next = next->next) { 2407 ++resp.bad_wr; 2408 if (next == bad_wr) 2409 break; 2410 } 2411 2412 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2413 if (ret2) 2414 ret = ret2; 2415 2416 out: 2417 while (wr) { 2418 next = wr->next; 2419 kfree(wr); 2420 wr = next; 2421 } 2422 2423 return ret; 2424 } 2425 2426 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2427 { 2428 struct ib_uverbs_create_ah cmd; 2429 struct ib_uverbs_create_ah_resp resp; 2430 struct ib_uobject *uobj; 2431 struct ib_pd *pd; 2432 struct ib_ah *ah; 2433 struct rdma_ah_attr attr = {}; 2434 int ret; 2435 struct ib_device *ib_dev; 2436 2437 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2438 if (ret) 2439 return ret; 2440 2441 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2442 if (IS_ERR(uobj)) 2443 return PTR_ERR(uobj); 2444 2445 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2446 ret = -EINVAL; 2447 goto err; 2448 } 2449 2450 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2451 if (!pd) { 2452 ret = -EINVAL; 2453 goto err; 2454 } 2455 2456 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2457 rdma_ah_set_make_grd(&attr, false); 2458 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2459 rdma_ah_set_sl(&attr, cmd.attr.sl); 2460 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2461 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2462 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2463 2464 if (cmd.attr.is_global) { 2465 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2466 cmd.attr.grh.sgid_index, 2467 cmd.attr.grh.hop_limit, 2468 cmd.attr.grh.traffic_class); 2469 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2470 } else { 2471 rdma_ah_set_ah_flags(&attr, 0); 2472 } 2473 2474 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2475 if (IS_ERR(ah)) { 2476 ret = PTR_ERR(ah); 2477 goto err_put; 2478 } 2479 2480 ah->uobject = uobj; 2481 uobj->user_handle = cmd.user_handle; 2482 uobj->object = ah; 2483 2484 resp.ah_handle = uobj->id; 2485 2486 ret = uverbs_response(attrs, &resp, sizeof(resp)); 2487 if (ret) 2488 goto err_copy; 2489 2490 uobj_put_obj_read(pd); 2491 rdma_alloc_commit_uobject(uobj, attrs); 2492 return 0; 2493 2494 err_copy: 2495 rdma_destroy_ah_user(ah, RDMA_DESTROY_AH_SLEEPABLE, 2496 uverbs_get_cleared_udata(attrs)); 2497 2498 err_put: 2499 uobj_put_obj_read(pd); 2500 2501 err: 2502 uobj_alloc_abort(uobj, attrs); 2503 return ret; 2504 } 2505 2506 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2507 { 2508 struct ib_uverbs_destroy_ah cmd; 2509 int ret; 2510 2511 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2512 if (ret) 2513 return ret; 2514 2515 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2516 } 2517 2518 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2519 { 2520 struct ib_uverbs_attach_mcast cmd; 2521 struct ib_qp *qp; 2522 struct ib_uqp_object *obj; 2523 struct ib_uverbs_mcast_entry *mcast; 2524 int ret; 2525 2526 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2527 if (ret) 2528 return ret; 2529 2530 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2531 if (!qp) 2532 return -EINVAL; 2533 2534 obj = qp->uobject; 2535 2536 mutex_lock(&obj->mcast_lock); 2537 list_for_each_entry(mcast, &obj->mcast_list, list) 2538 if (cmd.mlid == mcast->lid && 2539 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2540 ret = 0; 2541 goto out_put; 2542 } 2543 2544 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2545 if (!mcast) { 2546 ret = -ENOMEM; 2547 goto out_put; 2548 } 2549 2550 mcast->lid = cmd.mlid; 2551 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2552 2553 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2554 if (!ret) 2555 list_add_tail(&mcast->list, &obj->mcast_list); 2556 else 2557 kfree(mcast); 2558 2559 out_put: 2560 mutex_unlock(&obj->mcast_lock); 2561 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2562 UVERBS_LOOKUP_READ); 2563 2564 return ret; 2565 } 2566 2567 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2568 { 2569 struct ib_uverbs_detach_mcast cmd; 2570 struct ib_uqp_object *obj; 2571 struct ib_qp *qp; 2572 struct ib_uverbs_mcast_entry *mcast; 2573 int ret; 2574 bool found = false; 2575 2576 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2577 if (ret) 2578 return ret; 2579 2580 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2581 if (!qp) 2582 return -EINVAL; 2583 2584 obj = qp->uobject; 2585 mutex_lock(&obj->mcast_lock); 2586 2587 list_for_each_entry(mcast, &obj->mcast_list, list) 2588 if (cmd.mlid == mcast->lid && 2589 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2590 list_del(&mcast->list); 2591 kfree(mcast); 2592 found = true; 2593 break; 2594 } 2595 2596 if (!found) { 2597 ret = -EINVAL; 2598 goto out_put; 2599 } 2600 2601 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2602 2603 out_put: 2604 mutex_unlock(&obj->mcast_lock); 2605 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2606 UVERBS_LOOKUP_READ); 2607 return ret; 2608 } 2609 2610 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2611 { 2612 struct ib_uflow_resources *resources; 2613 2614 resources = kzalloc(sizeof(*resources), GFP_KERNEL); 2615 2616 if (!resources) 2617 return NULL; 2618 2619 if (!num_specs) 2620 goto out; 2621 2622 resources->counters = 2623 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); 2624 resources->collection = 2625 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); 2626 2627 if (!resources->counters || !resources->collection) 2628 goto err; 2629 2630 out: 2631 resources->max = num_specs; 2632 return resources; 2633 2634 err: 2635 kfree(resources->counters); 2636 kfree(resources); 2637 2638 return NULL; 2639 } 2640 EXPORT_SYMBOL(flow_resources_alloc); 2641 2642 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2643 { 2644 unsigned int i; 2645 2646 if (!uflow_res) 2647 return; 2648 2649 for (i = 0; i < uflow_res->collection_num; i++) 2650 atomic_dec(&uflow_res->collection[i]->usecnt); 2651 2652 for (i = 0; i < uflow_res->counters_num; i++) 2653 atomic_dec(&uflow_res->counters[i]->usecnt); 2654 2655 kfree(uflow_res->collection); 2656 kfree(uflow_res->counters); 2657 kfree(uflow_res); 2658 } 2659 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2660 2661 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2662 enum ib_flow_spec_type type, 2663 void *ibobj) 2664 { 2665 WARN_ON(uflow_res->num >= uflow_res->max); 2666 2667 switch (type) { 2668 case IB_FLOW_SPEC_ACTION_HANDLE: 2669 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2670 uflow_res->collection[uflow_res->collection_num++] = 2671 (struct ib_flow_action *)ibobj; 2672 break; 2673 case IB_FLOW_SPEC_ACTION_COUNT: 2674 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2675 uflow_res->counters[uflow_res->counters_num++] = 2676 (struct ib_counters *)ibobj; 2677 break; 2678 default: 2679 WARN_ON(1); 2680 } 2681 2682 uflow_res->num++; 2683 } 2684 EXPORT_SYMBOL(flow_resources_add); 2685 2686 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2687 struct ib_uverbs_flow_spec *kern_spec, 2688 union ib_flow_spec *ib_spec, 2689 struct ib_uflow_resources *uflow_res) 2690 { 2691 ib_spec->type = kern_spec->type; 2692 switch (ib_spec->type) { 2693 case IB_FLOW_SPEC_ACTION_TAG: 2694 if (kern_spec->flow_tag.size != 2695 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2696 return -EINVAL; 2697 2698 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2699 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2700 break; 2701 case IB_FLOW_SPEC_ACTION_DROP: 2702 if (kern_spec->drop.size != 2703 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2704 return -EINVAL; 2705 2706 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2707 break; 2708 case IB_FLOW_SPEC_ACTION_HANDLE: 2709 if (kern_spec->action.size != 2710 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2711 return -EOPNOTSUPP; 2712 ib_spec->action.act = uobj_get_obj_read(flow_action, 2713 UVERBS_OBJECT_FLOW_ACTION, 2714 kern_spec->action.handle, 2715 attrs); 2716 if (!ib_spec->action.act) 2717 return -EINVAL; 2718 ib_spec->action.size = 2719 sizeof(struct ib_flow_spec_action_handle); 2720 flow_resources_add(uflow_res, 2721 IB_FLOW_SPEC_ACTION_HANDLE, 2722 ib_spec->action.act); 2723 uobj_put_obj_read(ib_spec->action.act); 2724 break; 2725 case IB_FLOW_SPEC_ACTION_COUNT: 2726 if (kern_spec->flow_count.size != 2727 sizeof(struct ib_uverbs_flow_spec_action_count)) 2728 return -EINVAL; 2729 ib_spec->flow_count.counters = 2730 uobj_get_obj_read(counters, 2731 UVERBS_OBJECT_COUNTERS, 2732 kern_spec->flow_count.handle, 2733 attrs); 2734 if (!ib_spec->flow_count.counters) 2735 return -EINVAL; 2736 ib_spec->flow_count.size = 2737 sizeof(struct ib_flow_spec_action_count); 2738 flow_resources_add(uflow_res, 2739 IB_FLOW_SPEC_ACTION_COUNT, 2740 ib_spec->flow_count.counters); 2741 uobj_put_obj_read(ib_spec->flow_count.counters); 2742 break; 2743 default: 2744 return -EINVAL; 2745 } 2746 return 0; 2747 } 2748 2749 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2750 u16 ib_real_filter_sz) 2751 { 2752 /* 2753 * User space filter structures must be 64 bit aligned, otherwise this 2754 * may pass, but we won't handle additional new attributes. 2755 */ 2756 2757 if (kern_filter_size > ib_real_filter_sz) { 2758 if (memchr_inv(kern_spec_filter + 2759 ib_real_filter_sz, 0, 2760 kern_filter_size - ib_real_filter_sz)) 2761 return -EINVAL; 2762 return ib_real_filter_sz; 2763 } 2764 return kern_filter_size; 2765 } 2766 2767 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2768 const void *kern_spec_mask, 2769 const void *kern_spec_val, 2770 size_t kern_filter_sz, 2771 union ib_flow_spec *ib_spec) 2772 { 2773 ssize_t actual_filter_sz; 2774 ssize_t ib_filter_sz; 2775 2776 /* User flow spec size must be aligned to 4 bytes */ 2777 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2778 return -EINVAL; 2779 2780 ib_spec->type = type; 2781 2782 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2783 return -EINVAL; 2784 2785 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2786 case IB_FLOW_SPEC_ETH: 2787 ib_filter_sz = offsetof(struct ib_flow_eth_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_eth); 2794 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2795 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2796 break; 2797 case IB_FLOW_SPEC_IPV4: 2798 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz); 2799 actual_filter_sz = spec_filter_size(kern_spec_mask, 2800 kern_filter_sz, 2801 ib_filter_sz); 2802 if (actual_filter_sz <= 0) 2803 return -EINVAL; 2804 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2805 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2806 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2807 break; 2808 case IB_FLOW_SPEC_IPV6: 2809 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz); 2810 actual_filter_sz = spec_filter_size(kern_spec_mask, 2811 kern_filter_sz, 2812 ib_filter_sz); 2813 if (actual_filter_sz <= 0) 2814 return -EINVAL; 2815 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2816 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2817 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2818 2819 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2820 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2821 return -EINVAL; 2822 break; 2823 case IB_FLOW_SPEC_TCP: 2824 case IB_FLOW_SPEC_UDP: 2825 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz); 2826 actual_filter_sz = spec_filter_size(kern_spec_mask, 2827 kern_filter_sz, 2828 ib_filter_sz); 2829 if (actual_filter_sz <= 0) 2830 return -EINVAL; 2831 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2832 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2833 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2834 break; 2835 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2836 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz); 2837 actual_filter_sz = spec_filter_size(kern_spec_mask, 2838 kern_filter_sz, 2839 ib_filter_sz); 2840 if (actual_filter_sz <= 0) 2841 return -EINVAL; 2842 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2843 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2844 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2845 2846 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2847 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2848 return -EINVAL; 2849 break; 2850 case IB_FLOW_SPEC_ESP: 2851 ib_filter_sz = offsetof(struct ib_flow_esp_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->esp.size = sizeof(struct ib_flow_spec_esp); 2858 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2859 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2860 break; 2861 case IB_FLOW_SPEC_GRE: 2862 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz); 2863 actual_filter_sz = spec_filter_size(kern_spec_mask, 2864 kern_filter_sz, 2865 ib_filter_sz); 2866 if (actual_filter_sz <= 0) 2867 return -EINVAL; 2868 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2869 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2870 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2871 break; 2872 case IB_FLOW_SPEC_MPLS: 2873 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz); 2874 actual_filter_sz = spec_filter_size(kern_spec_mask, 2875 kern_filter_sz, 2876 ib_filter_sz); 2877 if (actual_filter_sz <= 0) 2878 return -EINVAL; 2879 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2880 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2881 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2882 break; 2883 default: 2884 return -EINVAL; 2885 } 2886 return 0; 2887 } 2888 2889 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2890 union ib_flow_spec *ib_spec) 2891 { 2892 size_t kern_filter_sz; 2893 void *kern_spec_mask; 2894 void *kern_spec_val; 2895 2896 if (check_sub_overflow((size_t)kern_spec->hdr.size, 2897 sizeof(struct ib_uverbs_flow_spec_hdr), 2898 &kern_filter_sz)) 2899 return -EINVAL; 2900 2901 kern_filter_sz /= 2; 2902 2903 kern_spec_val = (void *)kern_spec + 2904 sizeof(struct ib_uverbs_flow_spec_hdr); 2905 kern_spec_mask = kern_spec_val + kern_filter_sz; 2906 2907 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2908 kern_spec_mask, 2909 kern_spec_val, 2910 kern_filter_sz, ib_spec); 2911 } 2912 2913 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2914 struct ib_uverbs_flow_spec *kern_spec, 2915 union ib_flow_spec *ib_spec, 2916 struct ib_uflow_resources *uflow_res) 2917 { 2918 if (kern_spec->reserved) 2919 return -EINVAL; 2920 2921 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2922 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2923 uflow_res); 2924 else 2925 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2926 } 2927 2928 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2929 { 2930 struct ib_uverbs_ex_create_wq cmd; 2931 struct ib_uverbs_ex_create_wq_resp resp = {}; 2932 struct ib_uwq_object *obj; 2933 int err = 0; 2934 struct ib_cq *cq; 2935 struct ib_pd *pd; 2936 struct ib_wq *wq; 2937 struct ib_wq_init_attr wq_init_attr = {}; 2938 struct ib_device *ib_dev; 2939 2940 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2941 if (err) 2942 return err; 2943 2944 if (cmd.comp_mask) 2945 return -EOPNOTSUPP; 2946 2947 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2948 &ib_dev); 2949 if (IS_ERR(obj)) 2950 return PTR_ERR(obj); 2951 2952 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2953 if (!pd) { 2954 err = -EINVAL; 2955 goto err_uobj; 2956 } 2957 2958 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2959 if (!cq) { 2960 err = -EINVAL; 2961 goto err_put_pd; 2962 } 2963 2964 wq_init_attr.cq = cq; 2965 wq_init_attr.max_sge = cmd.max_sge; 2966 wq_init_attr.max_wr = cmd.max_wr; 2967 wq_init_attr.wq_type = cmd.wq_type; 2968 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2969 wq_init_attr.create_flags = cmd.create_flags; 2970 INIT_LIST_HEAD(&obj->uevent.event_list); 2971 obj->uevent.uobject.user_handle = cmd.user_handle; 2972 2973 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2974 if (IS_ERR(wq)) { 2975 err = PTR_ERR(wq); 2976 goto err_put_cq; 2977 } 2978 2979 wq->uobject = obj; 2980 obj->uevent.uobject.object = wq; 2981 wq->wq_type = wq_init_attr.wq_type; 2982 wq->cq = cq; 2983 wq->pd = pd; 2984 wq->device = pd->device; 2985 atomic_set(&wq->usecnt, 0); 2986 atomic_inc(&pd->usecnt); 2987 atomic_inc(&cq->usecnt); 2988 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 2989 if (obj->uevent.event_file) 2990 uverbs_uobject_get(&obj->uevent.event_file->uobj); 2991 2992 memset(&resp, 0, sizeof(resp)); 2993 resp.wq_handle = obj->uevent.uobject.id; 2994 resp.max_sge = wq_init_attr.max_sge; 2995 resp.max_wr = wq_init_attr.max_wr; 2996 resp.wqn = wq->wq_num; 2997 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2998 err = uverbs_response(attrs, &resp, sizeof(resp)); 2999 if (err) 3000 goto err_copy; 3001 3002 uobj_put_obj_read(pd); 3003 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3004 UVERBS_LOOKUP_READ); 3005 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 3006 return 0; 3007 3008 err_copy: 3009 if (obj->uevent.event_file) 3010 uverbs_uobject_put(&obj->uevent.event_file->uobj); 3011 ib_destroy_wq(wq, uverbs_get_cleared_udata(attrs)); 3012 err_put_cq: 3013 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3014 UVERBS_LOOKUP_READ); 3015 err_put_pd: 3016 uobj_put_obj_read(pd); 3017 err_uobj: 3018 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3019 3020 return err; 3021 } 3022 3023 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 3024 { 3025 struct ib_uverbs_ex_destroy_wq cmd; 3026 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 3027 struct ib_uobject *uobj; 3028 struct ib_uwq_object *obj; 3029 int ret; 3030 3031 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3032 if (ret) 3033 return ret; 3034 3035 if (cmd.comp_mask) 3036 return -EOPNOTSUPP; 3037 3038 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3039 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3040 if (IS_ERR(uobj)) 3041 return PTR_ERR(uobj); 3042 3043 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 3044 resp.events_reported = obj->uevent.events_reported; 3045 3046 uobj_put_destroy(uobj); 3047 3048 return uverbs_response(attrs, &resp, sizeof(resp)); 3049 } 3050 3051 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 3052 { 3053 struct ib_uverbs_ex_modify_wq cmd; 3054 struct ib_wq *wq; 3055 struct ib_wq_attr wq_attr = {}; 3056 int ret; 3057 3058 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3059 if (ret) 3060 return ret; 3061 3062 if (!cmd.attr_mask) 3063 return -EINVAL; 3064 3065 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3066 return -EINVAL; 3067 3068 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3069 if (!wq) 3070 return -EINVAL; 3071 3072 wq_attr.curr_wq_state = cmd.curr_wq_state; 3073 wq_attr.wq_state = cmd.wq_state; 3074 if (cmd.attr_mask & IB_WQ_FLAGS) { 3075 wq_attr.flags = cmd.flags; 3076 wq_attr.flags_mask = cmd.flags_mask; 3077 } 3078 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3079 &attrs->driver_udata); 3080 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, 3081 UVERBS_LOOKUP_READ); 3082 return ret; 3083 } 3084 3085 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3086 { 3087 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3088 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3089 struct ib_uobject *uobj; 3090 int err; 3091 struct ib_rwq_ind_table_init_attr init_attr = {}; 3092 struct ib_rwq_ind_table *rwq_ind_tbl; 3093 struct ib_wq **wqs = NULL; 3094 u32 *wqs_handles = NULL; 3095 struct ib_wq *wq = NULL; 3096 int i, j, num_read_wqs; 3097 u32 num_wq_handles; 3098 struct uverbs_req_iter iter; 3099 struct ib_device *ib_dev; 3100 3101 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3102 if (err) 3103 return err; 3104 3105 if (cmd.comp_mask) 3106 return -EOPNOTSUPP; 3107 3108 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3109 return -EINVAL; 3110 3111 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3112 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3113 GFP_KERNEL); 3114 if (!wqs_handles) 3115 return -ENOMEM; 3116 3117 err = uverbs_request_next(&iter, wqs_handles, 3118 num_wq_handles * sizeof(__u32)); 3119 if (err) 3120 goto err_free; 3121 3122 err = uverbs_request_finish(&iter); 3123 if (err) 3124 goto err_free; 3125 3126 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); 3127 if (!wqs) { 3128 err = -ENOMEM; 3129 goto err_free; 3130 } 3131 3132 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3133 num_read_wqs++) { 3134 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3135 wqs_handles[num_read_wqs], attrs); 3136 if (!wq) { 3137 err = -EINVAL; 3138 goto put_wqs; 3139 } 3140 3141 wqs[num_read_wqs] = wq; 3142 } 3143 3144 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3145 if (IS_ERR(uobj)) { 3146 err = PTR_ERR(uobj); 3147 goto put_wqs; 3148 } 3149 3150 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3151 init_attr.ind_tbl = wqs; 3152 3153 rwq_ind_tbl = ib_dev->ops.create_rwq_ind_table(ib_dev, &init_attr, 3154 &attrs->driver_udata); 3155 3156 if (IS_ERR(rwq_ind_tbl)) { 3157 err = PTR_ERR(rwq_ind_tbl); 3158 goto err_uobj; 3159 } 3160 3161 rwq_ind_tbl->ind_tbl = wqs; 3162 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3163 rwq_ind_tbl->uobject = uobj; 3164 uobj->object = rwq_ind_tbl; 3165 rwq_ind_tbl->device = ib_dev; 3166 atomic_set(&rwq_ind_tbl->usecnt, 0); 3167 3168 for (i = 0; i < num_wq_handles; i++) 3169 atomic_inc(&wqs[i]->usecnt); 3170 3171 resp.ind_tbl_handle = uobj->id; 3172 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3173 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3174 3175 err = uverbs_response(attrs, &resp, sizeof(resp)); 3176 if (err) 3177 goto err_copy; 3178 3179 kfree(wqs_handles); 3180 3181 for (j = 0; j < num_read_wqs; j++) 3182 rdma_lookup_put_uobject(&wqs[j]->uobject->uevent.uobject, 3183 UVERBS_LOOKUP_READ); 3184 3185 rdma_alloc_commit_uobject(uobj, attrs); 3186 return 0; 3187 3188 err_copy: 3189 ib_destroy_rwq_ind_table(rwq_ind_tbl); 3190 err_uobj: 3191 uobj_alloc_abort(uobj, attrs); 3192 put_wqs: 3193 for (j = 0; j < num_read_wqs; j++) 3194 rdma_lookup_put_uobject(&wqs[j]->uobject->uevent.uobject, 3195 UVERBS_LOOKUP_READ); 3196 err_free: 3197 kfree(wqs_handles); 3198 kfree(wqs); 3199 return err; 3200 } 3201 3202 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3203 { 3204 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3205 int ret; 3206 3207 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3208 if (ret) 3209 return ret; 3210 3211 if (cmd.comp_mask) 3212 return -EOPNOTSUPP; 3213 3214 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3215 cmd.ind_tbl_handle, attrs); 3216 } 3217 3218 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3219 { 3220 struct ib_uverbs_create_flow cmd; 3221 struct ib_uverbs_create_flow_resp resp; 3222 struct ib_uobject *uobj; 3223 struct ib_flow *flow_id; 3224 struct ib_uverbs_flow_attr *kern_flow_attr; 3225 struct ib_flow_attr *flow_attr; 3226 struct ib_qp *qp; 3227 struct ib_uflow_resources *uflow_res; 3228 struct ib_uverbs_flow_spec_hdr *kern_spec; 3229 struct uverbs_req_iter iter; 3230 int err; 3231 void *ib_spec; 3232 int i; 3233 struct ib_device *ib_dev; 3234 3235 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3236 if (err) 3237 return err; 3238 3239 if (cmd.comp_mask) 3240 return -EINVAL; 3241 3242 if (!capable(CAP_NET_RAW)) 3243 return -EPERM; 3244 3245 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3246 return -EINVAL; 3247 3248 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3249 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3250 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3251 return -EINVAL; 3252 3253 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3254 return -EINVAL; 3255 3256 if (cmd.flow_attr.size > 3257 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3258 return -EINVAL; 3259 3260 if (cmd.flow_attr.reserved[0] || 3261 cmd.flow_attr.reserved[1]) 3262 return -EINVAL; 3263 3264 if (cmd.flow_attr.num_of_specs) { 3265 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3266 GFP_KERNEL); 3267 if (!kern_flow_attr) 3268 return -ENOMEM; 3269 3270 *kern_flow_attr = cmd.flow_attr; 3271 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3272 cmd.flow_attr.size); 3273 if (err) 3274 goto err_free_attr; 3275 } else { 3276 kern_flow_attr = &cmd.flow_attr; 3277 } 3278 3279 err = uverbs_request_finish(&iter); 3280 if (err) 3281 goto err_free_attr; 3282 3283 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3284 if (IS_ERR(uobj)) { 3285 err = PTR_ERR(uobj); 3286 goto err_free_attr; 3287 } 3288 3289 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3290 if (!qp) { 3291 err = -EINVAL; 3292 goto err_uobj; 3293 } 3294 3295 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3296 err = -EINVAL; 3297 goto err_put; 3298 } 3299 3300 flow_attr = kzalloc(struct_size(flow_attr, flows, 3301 cmd.flow_attr.num_of_specs), GFP_KERNEL); 3302 if (!flow_attr) { 3303 err = -ENOMEM; 3304 goto err_put; 3305 } 3306 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3307 if (!uflow_res) { 3308 err = -ENOMEM; 3309 goto err_free_flow_attr; 3310 } 3311 3312 flow_attr->type = kern_flow_attr->type; 3313 flow_attr->priority = kern_flow_attr->priority; 3314 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3315 flow_attr->port = kern_flow_attr->port; 3316 flow_attr->flags = kern_flow_attr->flags; 3317 flow_attr->size = sizeof(*flow_attr); 3318 3319 kern_spec = kern_flow_attr->flow_specs; 3320 ib_spec = flow_attr + 1; 3321 for (i = 0; i < flow_attr->num_of_specs && 3322 cmd.flow_attr.size >= sizeof(*kern_spec) && 3323 cmd.flow_attr.size >= kern_spec->size; 3324 i++) { 3325 err = kern_spec_to_ib_spec( 3326 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3327 ib_spec, uflow_res); 3328 if (err) 3329 goto err_free; 3330 3331 flow_attr->size += 3332 ((union ib_flow_spec *) ib_spec)->size; 3333 cmd.flow_attr.size -= kern_spec->size; 3334 kern_spec = ((void *)kern_spec) + kern_spec->size; 3335 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3336 } 3337 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3338 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n", 3339 i, cmd.flow_attr.size); 3340 err = -EINVAL; 3341 goto err_free; 3342 } 3343 3344 flow_id = qp->device->ops.create_flow( 3345 qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata); 3346 3347 if (IS_ERR(flow_id)) { 3348 err = PTR_ERR(flow_id); 3349 goto err_free; 3350 } 3351 3352 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3353 3354 memset(&resp, 0, sizeof(resp)); 3355 resp.flow_handle = uobj->id; 3356 3357 err = uverbs_response(attrs, &resp, sizeof(resp)); 3358 if (err) 3359 goto err_copy; 3360 3361 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3362 UVERBS_LOOKUP_READ); 3363 kfree(flow_attr); 3364 if (cmd.flow_attr.num_of_specs) 3365 kfree(kern_flow_attr); 3366 rdma_alloc_commit_uobject(uobj, attrs); 3367 return 0; 3368 err_copy: 3369 if (!qp->device->ops.destroy_flow(flow_id)) 3370 atomic_dec(&qp->usecnt); 3371 err_free: 3372 ib_uverbs_flow_resources_free(uflow_res); 3373 err_free_flow_attr: 3374 kfree(flow_attr); 3375 err_put: 3376 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3377 UVERBS_LOOKUP_READ); 3378 err_uobj: 3379 uobj_alloc_abort(uobj, attrs); 3380 err_free_attr: 3381 if (cmd.flow_attr.num_of_specs) 3382 kfree(kern_flow_attr); 3383 return err; 3384 } 3385 3386 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3387 { 3388 struct ib_uverbs_destroy_flow cmd; 3389 int ret; 3390 3391 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3392 if (ret) 3393 return ret; 3394 3395 if (cmd.comp_mask) 3396 return -EINVAL; 3397 3398 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3399 } 3400 3401 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3402 struct ib_uverbs_create_xsrq *cmd, 3403 struct ib_udata *udata) 3404 { 3405 struct ib_uverbs_create_srq_resp resp; 3406 struct ib_usrq_object *obj; 3407 struct ib_pd *pd; 3408 struct ib_srq *srq; 3409 struct ib_uobject *uninitialized_var(xrcd_uobj); 3410 struct ib_srq_init_attr attr; 3411 int ret; 3412 struct ib_device *ib_dev; 3413 3414 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3415 &ib_dev); 3416 if (IS_ERR(obj)) 3417 return PTR_ERR(obj); 3418 3419 if (cmd->srq_type == IB_SRQT_TM) 3420 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3421 3422 if (cmd->srq_type == IB_SRQT_XRC) { 3423 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3424 attrs); 3425 if (IS_ERR(xrcd_uobj)) { 3426 ret = -EINVAL; 3427 goto err; 3428 } 3429 3430 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3431 if (!attr.ext.xrc.xrcd) { 3432 ret = -EINVAL; 3433 goto err_put_xrcd; 3434 } 3435 3436 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3437 atomic_inc(&obj->uxrcd->refcnt); 3438 } 3439 3440 if (ib_srq_has_cq(cmd->srq_type)) { 3441 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3442 cmd->cq_handle, attrs); 3443 if (!attr.ext.cq) { 3444 ret = -EINVAL; 3445 goto err_put_xrcd; 3446 } 3447 } 3448 3449 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3450 if (!pd) { 3451 ret = -EINVAL; 3452 goto err_put_cq; 3453 } 3454 3455 attr.event_handler = ib_uverbs_srq_event_handler; 3456 attr.srq_type = cmd->srq_type; 3457 attr.attr.max_wr = cmd->max_wr; 3458 attr.attr.max_sge = cmd->max_sge; 3459 attr.attr.srq_limit = cmd->srq_limit; 3460 3461 INIT_LIST_HEAD(&obj->uevent.event_list); 3462 obj->uevent.uobject.user_handle = cmd->user_handle; 3463 3464 srq = ib_create_srq_user(pd, &attr, obj, udata); 3465 if (IS_ERR(srq)) { 3466 ret = PTR_ERR(srq); 3467 goto err_put_pd; 3468 } 3469 3470 obj->uevent.uobject.object = srq; 3471 obj->uevent.uobject.user_handle = cmd->user_handle; 3472 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 3473 if (obj->uevent.event_file) 3474 uverbs_uobject_get(&obj->uevent.event_file->uobj); 3475 3476 memset(&resp, 0, sizeof resp); 3477 resp.srq_handle = obj->uevent.uobject.id; 3478 resp.max_wr = attr.attr.max_wr; 3479 resp.max_sge = attr.attr.max_sge; 3480 if (cmd->srq_type == IB_SRQT_XRC) 3481 resp.srqn = srq->ext.xrc.srq_num; 3482 3483 ret = uverbs_response(attrs, &resp, sizeof(resp)); 3484 if (ret) 3485 goto err_copy; 3486 3487 if (cmd->srq_type == IB_SRQT_XRC) 3488 uobj_put_read(xrcd_uobj); 3489 3490 if (ib_srq_has_cq(cmd->srq_type)) 3491 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3492 UVERBS_LOOKUP_READ); 3493 3494 uobj_put_obj_read(pd); 3495 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 3496 return 0; 3497 3498 err_copy: 3499 if (obj->uevent.event_file) 3500 uverbs_uobject_put(&obj->uevent.event_file->uobj); 3501 ib_destroy_srq_user(srq, uverbs_get_cleared_udata(attrs)); 3502 err_put_pd: 3503 uobj_put_obj_read(pd); 3504 err_put_cq: 3505 if (ib_srq_has_cq(cmd->srq_type)) 3506 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3507 UVERBS_LOOKUP_READ); 3508 3509 err_put_xrcd: 3510 if (cmd->srq_type == IB_SRQT_XRC) { 3511 atomic_dec(&obj->uxrcd->refcnt); 3512 uobj_put_read(xrcd_uobj); 3513 } 3514 3515 err: 3516 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3517 return ret; 3518 } 3519 3520 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3521 { 3522 struct ib_uverbs_create_srq cmd; 3523 struct ib_uverbs_create_xsrq xcmd; 3524 int ret; 3525 3526 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3527 if (ret) 3528 return ret; 3529 3530 memset(&xcmd, 0, sizeof(xcmd)); 3531 xcmd.response = cmd.response; 3532 xcmd.user_handle = cmd.user_handle; 3533 xcmd.srq_type = IB_SRQT_BASIC; 3534 xcmd.pd_handle = cmd.pd_handle; 3535 xcmd.max_wr = cmd.max_wr; 3536 xcmd.max_sge = cmd.max_sge; 3537 xcmd.srq_limit = cmd.srq_limit; 3538 3539 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3540 } 3541 3542 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3543 { 3544 struct ib_uverbs_create_xsrq cmd; 3545 int ret; 3546 3547 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3548 if (ret) 3549 return ret; 3550 3551 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3552 } 3553 3554 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3555 { 3556 struct ib_uverbs_modify_srq cmd; 3557 struct ib_srq *srq; 3558 struct ib_srq_attr attr; 3559 int ret; 3560 3561 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3562 if (ret) 3563 return ret; 3564 3565 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3566 if (!srq) 3567 return -EINVAL; 3568 3569 attr.max_wr = cmd.max_wr; 3570 attr.srq_limit = cmd.srq_limit; 3571 3572 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3573 &attrs->driver_udata); 3574 3575 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3576 UVERBS_LOOKUP_READ); 3577 3578 return ret; 3579 } 3580 3581 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3582 { 3583 struct ib_uverbs_query_srq cmd; 3584 struct ib_uverbs_query_srq_resp resp; 3585 struct ib_srq_attr attr; 3586 struct ib_srq *srq; 3587 int ret; 3588 3589 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3590 if (ret) 3591 return ret; 3592 3593 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3594 if (!srq) 3595 return -EINVAL; 3596 3597 ret = ib_query_srq(srq, &attr); 3598 3599 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3600 UVERBS_LOOKUP_READ); 3601 3602 if (ret) 3603 return ret; 3604 3605 memset(&resp, 0, sizeof resp); 3606 3607 resp.max_wr = attr.max_wr; 3608 resp.max_sge = attr.max_sge; 3609 resp.srq_limit = attr.srq_limit; 3610 3611 return uverbs_response(attrs, &resp, sizeof(resp)); 3612 } 3613 3614 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3615 { 3616 struct ib_uverbs_destroy_srq cmd; 3617 struct ib_uverbs_destroy_srq_resp resp; 3618 struct ib_uobject *uobj; 3619 struct ib_uevent_object *obj; 3620 int ret; 3621 3622 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3623 if (ret) 3624 return ret; 3625 3626 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3627 if (IS_ERR(uobj)) 3628 return PTR_ERR(uobj); 3629 3630 obj = container_of(uobj, struct ib_uevent_object, uobject); 3631 memset(&resp, 0, sizeof(resp)); 3632 resp.events_reported = obj->events_reported; 3633 3634 uobj_put_destroy(uobj); 3635 3636 return uverbs_response(attrs, &resp, sizeof(resp)); 3637 } 3638 3639 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3640 { 3641 struct ib_uverbs_ex_query_device_resp resp = {}; 3642 struct ib_uverbs_ex_query_device cmd; 3643 struct ib_device_attr attr = {0}; 3644 struct ib_ucontext *ucontext; 3645 struct ib_device *ib_dev; 3646 int err; 3647 3648 ucontext = ib_uverbs_get_ucontext(attrs); 3649 if (IS_ERR(ucontext)) 3650 return PTR_ERR(ucontext); 3651 ib_dev = ucontext->device; 3652 3653 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3654 if (err) 3655 return err; 3656 3657 if (cmd.comp_mask) 3658 return -EINVAL; 3659 3660 if (cmd.reserved) 3661 return -EINVAL; 3662 3663 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3664 if (err) 3665 return err; 3666 3667 copy_query_dev_fields(ucontext, &resp.base, &attr); 3668 3669 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3670 resp.odp_caps.per_transport_caps.rc_odp_caps = 3671 attr.odp_caps.per_transport_caps.rc_odp_caps; 3672 resp.odp_caps.per_transport_caps.uc_odp_caps = 3673 attr.odp_caps.per_transport_caps.uc_odp_caps; 3674 resp.odp_caps.per_transport_caps.ud_odp_caps = 3675 attr.odp_caps.per_transport_caps.ud_odp_caps; 3676 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3677 3678 resp.timestamp_mask = attr.timestamp_mask; 3679 resp.hca_core_clock = attr.hca_core_clock; 3680 resp.device_cap_flags_ex = attr.device_cap_flags; 3681 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3682 resp.rss_caps.max_rwq_indirection_tables = 3683 attr.rss_caps.max_rwq_indirection_tables; 3684 resp.rss_caps.max_rwq_indirection_table_size = 3685 attr.rss_caps.max_rwq_indirection_table_size; 3686 resp.max_wq_type_rq = attr.max_wq_type_rq; 3687 resp.raw_packet_caps = attr.raw_packet_caps; 3688 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3689 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3690 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3691 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3692 resp.tm_caps.flags = attr.tm_caps.flags; 3693 resp.cq_moderation_caps.max_cq_moderation_count = 3694 attr.cq_caps.max_cq_moderation_count; 3695 resp.cq_moderation_caps.max_cq_moderation_period = 3696 attr.cq_caps.max_cq_moderation_period; 3697 resp.max_dm_size = attr.max_dm_size; 3698 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3699 3700 return uverbs_response(attrs, &resp, sizeof(resp)); 3701 } 3702 3703 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3704 { 3705 struct ib_uverbs_ex_modify_cq cmd; 3706 struct ib_cq *cq; 3707 int ret; 3708 3709 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3710 if (ret) 3711 return ret; 3712 3713 if (!cmd.attr_mask || cmd.reserved) 3714 return -EINVAL; 3715 3716 if (cmd.attr_mask > IB_CQ_MODERATE) 3717 return -EOPNOTSUPP; 3718 3719 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3720 if (!cq) 3721 return -EINVAL; 3722 3723 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3724 3725 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3726 UVERBS_LOOKUP_READ); 3727 return ret; 3728 } 3729 3730 /* 3731 * Describe the input structs for write(). Some write methods have an input 3732 * only struct, most have an input and output. If the struct has an output then 3733 * the 'response' u64 must be the first field in the request structure. 3734 * 3735 * If udata is present then both the request and response structs have a 3736 * trailing driver_data flex array. In this case the size of the base struct 3737 * cannot be changed. 3738 */ 3739 #define UAPI_DEF_WRITE_IO(req, resp) \ 3740 .write.has_resp = 1 + \ 3741 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3742 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \ 3743 sizeof(u64)), \ 3744 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3745 3746 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3747 3748 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3749 UAPI_DEF_WRITE_IO(req, resp), \ 3750 .write.has_udata = \ 3751 1 + \ 3752 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3753 sizeof(req)) + \ 3754 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3755 sizeof(resp)) 3756 3757 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3758 UAPI_DEF_WRITE_I(req), \ 3759 .write.has_udata = \ 3760 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3761 sizeof(req)) 3762 3763 /* 3764 * The _EX versions are for use with WRITE_EX and allow the last struct member 3765 * to be specified. Buffers that do not include that member will be rejected. 3766 */ 3767 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3768 .write.has_resp = 1, \ 3769 .write.req_size = offsetofend(req, req_last_member), \ 3770 .write.resp_size = offsetofend(resp, resp_last_member) 3771 3772 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3773 .write.req_size = offsetofend(req, req_last_member) 3774 3775 const struct uapi_definition uverbs_def_write_intf[] = { 3776 DECLARE_UVERBS_OBJECT( 3777 UVERBS_OBJECT_AH, 3778 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3779 ib_uverbs_create_ah, 3780 UAPI_DEF_WRITE_UDATA_IO( 3781 struct ib_uverbs_create_ah, 3782 struct ib_uverbs_create_ah_resp), 3783 UAPI_DEF_METHOD_NEEDS_FN(create_ah)), 3784 DECLARE_UVERBS_WRITE( 3785 IB_USER_VERBS_CMD_DESTROY_AH, 3786 ib_uverbs_destroy_ah, 3787 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah), 3788 UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))), 3789 3790 DECLARE_UVERBS_OBJECT( 3791 UVERBS_OBJECT_COMP_CHANNEL, 3792 DECLARE_UVERBS_WRITE( 3793 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3794 ib_uverbs_create_comp_channel, 3795 UAPI_DEF_WRITE_IO( 3796 struct ib_uverbs_create_comp_channel, 3797 struct ib_uverbs_create_comp_channel_resp))), 3798 3799 DECLARE_UVERBS_OBJECT( 3800 UVERBS_OBJECT_CQ, 3801 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3802 ib_uverbs_create_cq, 3803 UAPI_DEF_WRITE_UDATA_IO( 3804 struct ib_uverbs_create_cq, 3805 struct ib_uverbs_create_cq_resp), 3806 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3807 DECLARE_UVERBS_WRITE( 3808 IB_USER_VERBS_CMD_DESTROY_CQ, 3809 ib_uverbs_destroy_cq, 3810 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3811 struct ib_uverbs_destroy_cq_resp), 3812 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3813 DECLARE_UVERBS_WRITE( 3814 IB_USER_VERBS_CMD_POLL_CQ, 3815 ib_uverbs_poll_cq, 3816 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3817 struct ib_uverbs_poll_cq_resp), 3818 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3819 DECLARE_UVERBS_WRITE( 3820 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3821 ib_uverbs_req_notify_cq, 3822 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3823 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3824 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3825 ib_uverbs_resize_cq, 3826 UAPI_DEF_WRITE_UDATA_IO( 3827 struct ib_uverbs_resize_cq, 3828 struct ib_uverbs_resize_cq_resp), 3829 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3830 DECLARE_UVERBS_WRITE_EX( 3831 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3832 ib_uverbs_ex_create_cq, 3833 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3834 reserved, 3835 struct ib_uverbs_ex_create_cq_resp, 3836 response_length), 3837 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3838 DECLARE_UVERBS_WRITE_EX( 3839 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3840 ib_uverbs_ex_modify_cq, 3841 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3842 UAPI_DEF_METHOD_NEEDS_FN(create_cq))), 3843 3844 DECLARE_UVERBS_OBJECT( 3845 UVERBS_OBJECT_DEVICE, 3846 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3847 ib_uverbs_get_context, 3848 UAPI_DEF_WRITE_UDATA_IO( 3849 struct ib_uverbs_get_context, 3850 struct ib_uverbs_get_context_resp)), 3851 DECLARE_UVERBS_WRITE( 3852 IB_USER_VERBS_CMD_QUERY_DEVICE, 3853 ib_uverbs_query_device, 3854 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3855 struct ib_uverbs_query_device_resp)), 3856 DECLARE_UVERBS_WRITE( 3857 IB_USER_VERBS_CMD_QUERY_PORT, 3858 ib_uverbs_query_port, 3859 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3860 struct ib_uverbs_query_port_resp), 3861 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3862 DECLARE_UVERBS_WRITE_EX( 3863 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3864 ib_uverbs_ex_query_device, 3865 UAPI_DEF_WRITE_IO_EX( 3866 struct ib_uverbs_ex_query_device, 3867 reserved, 3868 struct ib_uverbs_ex_query_device_resp, 3869 response_length), 3870 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3871 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3872 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3873 3874 DECLARE_UVERBS_OBJECT( 3875 UVERBS_OBJECT_FLOW, 3876 DECLARE_UVERBS_WRITE_EX( 3877 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3878 ib_uverbs_ex_create_flow, 3879 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3880 flow_attr, 3881 struct ib_uverbs_create_flow_resp, 3882 flow_handle), 3883 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3884 DECLARE_UVERBS_WRITE_EX( 3885 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3886 ib_uverbs_ex_destroy_flow, 3887 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3888 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3889 3890 DECLARE_UVERBS_OBJECT( 3891 UVERBS_OBJECT_MR, 3892 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3893 ib_uverbs_dereg_mr, 3894 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3895 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3896 DECLARE_UVERBS_WRITE( 3897 IB_USER_VERBS_CMD_REG_MR, 3898 ib_uverbs_reg_mr, 3899 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3900 struct ib_uverbs_reg_mr_resp), 3901 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3902 DECLARE_UVERBS_WRITE( 3903 IB_USER_VERBS_CMD_REREG_MR, 3904 ib_uverbs_rereg_mr, 3905 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3906 struct ib_uverbs_rereg_mr_resp), 3907 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3908 3909 DECLARE_UVERBS_OBJECT( 3910 UVERBS_OBJECT_MW, 3911 DECLARE_UVERBS_WRITE( 3912 IB_USER_VERBS_CMD_ALLOC_MW, 3913 ib_uverbs_alloc_mw, 3914 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3915 struct ib_uverbs_alloc_mw_resp), 3916 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3917 DECLARE_UVERBS_WRITE( 3918 IB_USER_VERBS_CMD_DEALLOC_MW, 3919 ib_uverbs_dealloc_mw, 3920 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3921 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3922 3923 DECLARE_UVERBS_OBJECT( 3924 UVERBS_OBJECT_PD, 3925 DECLARE_UVERBS_WRITE( 3926 IB_USER_VERBS_CMD_ALLOC_PD, 3927 ib_uverbs_alloc_pd, 3928 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3929 struct ib_uverbs_alloc_pd_resp), 3930 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3931 DECLARE_UVERBS_WRITE( 3932 IB_USER_VERBS_CMD_DEALLOC_PD, 3933 ib_uverbs_dealloc_pd, 3934 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3935 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3936 3937 DECLARE_UVERBS_OBJECT( 3938 UVERBS_OBJECT_QP, 3939 DECLARE_UVERBS_WRITE( 3940 IB_USER_VERBS_CMD_ATTACH_MCAST, 3941 ib_uverbs_attach_mcast, 3942 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3943 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3944 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3945 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3946 ib_uverbs_create_qp, 3947 UAPI_DEF_WRITE_UDATA_IO( 3948 struct ib_uverbs_create_qp, 3949 struct ib_uverbs_create_qp_resp), 3950 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3951 DECLARE_UVERBS_WRITE( 3952 IB_USER_VERBS_CMD_DESTROY_QP, 3953 ib_uverbs_destroy_qp, 3954 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3955 struct ib_uverbs_destroy_qp_resp), 3956 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3957 DECLARE_UVERBS_WRITE( 3958 IB_USER_VERBS_CMD_DETACH_MCAST, 3959 ib_uverbs_detach_mcast, 3960 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3961 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3962 DECLARE_UVERBS_WRITE( 3963 IB_USER_VERBS_CMD_MODIFY_QP, 3964 ib_uverbs_modify_qp, 3965 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3966 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3967 DECLARE_UVERBS_WRITE( 3968 IB_USER_VERBS_CMD_POST_RECV, 3969 ib_uverbs_post_recv, 3970 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3971 struct ib_uverbs_post_recv_resp), 3972 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3973 DECLARE_UVERBS_WRITE( 3974 IB_USER_VERBS_CMD_POST_SEND, 3975 ib_uverbs_post_send, 3976 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3977 struct ib_uverbs_post_send_resp), 3978 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3979 DECLARE_UVERBS_WRITE( 3980 IB_USER_VERBS_CMD_QUERY_QP, 3981 ib_uverbs_query_qp, 3982 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3983 struct ib_uverbs_query_qp_resp), 3984 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3985 DECLARE_UVERBS_WRITE_EX( 3986 IB_USER_VERBS_EX_CMD_CREATE_QP, 3987 ib_uverbs_ex_create_qp, 3988 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3989 comp_mask, 3990 struct ib_uverbs_ex_create_qp_resp, 3991 response_length), 3992 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3993 DECLARE_UVERBS_WRITE_EX( 3994 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3995 ib_uverbs_ex_modify_qp, 3996 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3997 base, 3998 struct ib_uverbs_ex_modify_qp_resp, 3999 response_length), 4000 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 4001 4002 DECLARE_UVERBS_OBJECT( 4003 UVERBS_OBJECT_RWQ_IND_TBL, 4004 DECLARE_UVERBS_WRITE_EX( 4005 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 4006 ib_uverbs_ex_create_rwq_ind_table, 4007 UAPI_DEF_WRITE_IO_EX( 4008 struct ib_uverbs_ex_create_rwq_ind_table, 4009 log_ind_tbl_size, 4010 struct ib_uverbs_ex_create_rwq_ind_table_resp, 4011 ind_tbl_num), 4012 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 4013 DECLARE_UVERBS_WRITE_EX( 4014 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 4015 ib_uverbs_ex_destroy_rwq_ind_table, 4016 UAPI_DEF_WRITE_I( 4017 struct ib_uverbs_ex_destroy_rwq_ind_table), 4018 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 4019 4020 DECLARE_UVERBS_OBJECT( 4021 UVERBS_OBJECT_WQ, 4022 DECLARE_UVERBS_WRITE_EX( 4023 IB_USER_VERBS_EX_CMD_CREATE_WQ, 4024 ib_uverbs_ex_create_wq, 4025 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 4026 max_sge, 4027 struct ib_uverbs_ex_create_wq_resp, 4028 wqn), 4029 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 4030 DECLARE_UVERBS_WRITE_EX( 4031 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 4032 ib_uverbs_ex_destroy_wq, 4033 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 4034 wq_handle, 4035 struct ib_uverbs_ex_destroy_wq_resp, 4036 reserved), 4037 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 4038 DECLARE_UVERBS_WRITE_EX( 4039 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 4040 ib_uverbs_ex_modify_wq, 4041 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 4042 curr_wq_state), 4043 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 4044 4045 DECLARE_UVERBS_OBJECT( 4046 UVERBS_OBJECT_SRQ, 4047 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 4048 ib_uverbs_create_srq, 4049 UAPI_DEF_WRITE_UDATA_IO( 4050 struct ib_uverbs_create_srq, 4051 struct ib_uverbs_create_srq_resp), 4052 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4053 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 4054 ib_uverbs_create_xsrq, 4055 UAPI_DEF_WRITE_UDATA_IO( 4056 struct ib_uverbs_create_xsrq, 4057 struct ib_uverbs_create_srq_resp), 4058 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4059 DECLARE_UVERBS_WRITE( 4060 IB_USER_VERBS_CMD_DESTROY_SRQ, 4061 ib_uverbs_destroy_srq, 4062 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4063 struct ib_uverbs_destroy_srq_resp), 4064 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4065 DECLARE_UVERBS_WRITE( 4066 IB_USER_VERBS_CMD_MODIFY_SRQ, 4067 ib_uverbs_modify_srq, 4068 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4069 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4070 DECLARE_UVERBS_WRITE( 4071 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4072 ib_uverbs_post_srq_recv, 4073 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4074 struct ib_uverbs_post_srq_recv_resp), 4075 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4076 DECLARE_UVERBS_WRITE( 4077 IB_USER_VERBS_CMD_QUERY_SRQ, 4078 ib_uverbs_query_srq, 4079 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4080 struct ib_uverbs_query_srq_resp), 4081 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4082 4083 DECLARE_UVERBS_OBJECT( 4084 UVERBS_OBJECT_XRCD, 4085 DECLARE_UVERBS_WRITE( 4086 IB_USER_VERBS_CMD_CLOSE_XRCD, 4087 ib_uverbs_close_xrcd, 4088 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd), 4089 UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)), 4090 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4091 ib_uverbs_open_qp, 4092 UAPI_DEF_WRITE_UDATA_IO( 4093 struct ib_uverbs_open_qp, 4094 struct ib_uverbs_create_qp_resp)), 4095 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4096 ib_uverbs_open_xrcd, 4097 UAPI_DEF_WRITE_UDATA_IO( 4098 struct ib_uverbs_open_xrcd, 4099 struct ib_uverbs_open_xrcd_resp), 4100 UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))), 4101 4102 {}, 4103 }; 4104