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/ib_ucaps.h> 46 #include "rdma_core.h" 47 48 #include "uverbs.h" 49 #include "core_priv.h" 50 51 /* 52 * Copy a response to userspace. If the provided 'resp' is larger than the 53 * user buffer it is silently truncated. If the user provided a larger buffer 54 * then the trailing portion is zero filled. 55 * 56 * These semantics are intended to support future extension of the output 57 * structures. 58 */ 59 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp, 60 size_t resp_len) 61 { 62 int ret; 63 64 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 65 return uverbs_copy_to_struct_or_zero( 66 attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len); 67 68 if (copy_to_user(attrs->ucore.outbuf, resp, 69 min(attrs->ucore.outlen, resp_len))) 70 return -EFAULT; 71 72 if (resp_len < attrs->ucore.outlen) { 73 /* 74 * Zero fill any extra memory that user 75 * space might have provided. 76 */ 77 ret = clear_user(attrs->ucore.outbuf + resp_len, 78 attrs->ucore.outlen - resp_len); 79 if (ret) 80 return -EFAULT; 81 } 82 83 return 0; 84 } 85 86 /* 87 * Copy a request from userspace. If the provided 'req' is larger than the 88 * user buffer then the user buffer is zero extended into the 'req'. If 'req' 89 * is smaller than the user buffer then the uncopied bytes in the user buffer 90 * must be zero. 91 */ 92 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req, 93 size_t req_len) 94 { 95 if (copy_from_user(req, attrs->ucore.inbuf, 96 min(attrs->ucore.inlen, req_len))) 97 return -EFAULT; 98 99 if (attrs->ucore.inlen < req_len) { 100 memset(req + attrs->ucore.inlen, 0, 101 req_len - attrs->ucore.inlen); 102 } else if (attrs->ucore.inlen > req_len) { 103 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len, 104 attrs->ucore.inlen - req_len)) 105 return -EOPNOTSUPP; 106 } 107 return 0; 108 } 109 110 /* 111 * Generate the value for the 'response_length' protocol used by write_ex. 112 * This is the number of bytes the kernel actually wrote. Userspace can use 113 * this to detect what structure members in the response the kernel 114 * understood. 115 */ 116 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs, 117 size_t resp_len) 118 { 119 return min_t(size_t, attrs->ucore.outlen, resp_len); 120 } 121 122 /* 123 * The iterator version of the request interface is for handlers that need to 124 * step over a flex array at the end of a command header. 125 */ 126 struct uverbs_req_iter { 127 const void __user *cur; 128 const void __user *end; 129 }; 130 131 static int uverbs_request_start(struct uverbs_attr_bundle *attrs, 132 struct uverbs_req_iter *iter, 133 void *req, 134 size_t req_len) 135 { 136 if (attrs->ucore.inlen < req_len) 137 return -ENOSPC; 138 139 if (copy_from_user(req, attrs->ucore.inbuf, req_len)) 140 return -EFAULT; 141 142 iter->cur = attrs->ucore.inbuf + req_len; 143 iter->end = attrs->ucore.inbuf + attrs->ucore.inlen; 144 return 0; 145 } 146 147 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val, 148 size_t len) 149 { 150 if (iter->cur + len > iter->end) 151 return -ENOSPC; 152 153 if (copy_from_user(val, iter->cur, len)) 154 return -EFAULT; 155 156 iter->cur += len; 157 return 0; 158 } 159 160 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter, 161 size_t len) 162 { 163 const void __user *res = iter->cur; 164 165 if (len > iter->end - iter->cur) 166 return (void __force __user *)ERR_PTR(-ENOSPC); 167 iter->cur += len; 168 return res; 169 } 170 171 static int uverbs_request_finish(struct uverbs_req_iter *iter) 172 { 173 if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur)) 174 return -EOPNOTSUPP; 175 return 0; 176 } 177 178 /* 179 * When calling a destroy function during an error unwind we need to pass in 180 * the udata that is sanitized of all user arguments. Ie from the driver 181 * perspective it looks like no udata was passed. 182 */ 183 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs) 184 { 185 attrs->driver_udata = (struct ib_udata){}; 186 return &attrs->driver_udata; 187 } 188 189 static struct ib_uverbs_completion_event_file * 190 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs) 191 { 192 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL, 193 fd, attrs); 194 195 if (IS_ERR(uobj)) 196 return ERR_CAST(uobj); 197 198 uverbs_uobject_get(uobj); 199 uobj_put_read(uobj); 200 201 return container_of(uobj, struct ib_uverbs_completion_event_file, 202 uobj); 203 } 204 #define ib_uverbs_lookup_comp_file(_fd, _ufile) \ 205 _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile) 206 207 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs) 208 { 209 struct ib_uverbs_file *ufile = attrs->ufile; 210 struct ib_ucontext *ucontext; 211 struct ib_device *ib_dev; 212 213 ib_dev = srcu_dereference(ufile->device->ib_dev, 214 &ufile->device->disassociate_srcu); 215 if (!ib_dev) 216 return -EIO; 217 218 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext); 219 if (!ucontext) 220 return -ENOMEM; 221 222 ucontext->device = ib_dev; 223 ucontext->ufile = ufile; 224 xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC); 225 226 rdma_restrack_new(&ucontext->res, RDMA_RESTRACK_CTX); 227 rdma_restrack_set_name(&ucontext->res, NULL); 228 attrs->context = ucontext; 229 return 0; 230 } 231 232 int ib_init_ucontext(struct uverbs_attr_bundle *attrs) 233 { 234 struct ib_ucontext *ucontext = attrs->context; 235 struct ib_uverbs_file *file = attrs->ufile; 236 int *fd_array; 237 int fd_count; 238 int ret; 239 240 if (!down_read_trylock(&file->hw_destroy_rwsem)) 241 return -EIO; 242 mutex_lock(&file->ucontext_lock); 243 if (file->ucontext) { 244 ret = -EINVAL; 245 goto err; 246 } 247 248 ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device, 249 RDMACG_RESOURCE_HCA_HANDLE); 250 if (ret) 251 goto err; 252 253 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_GET_CONTEXT_FD_ARR)) { 254 fd_count = uverbs_attr_ptr_get_array_size(attrs, 255 UVERBS_ATTR_GET_CONTEXT_FD_ARR, 256 sizeof(int)); 257 if (fd_count < 0) { 258 ret = fd_count; 259 goto err_uncharge; 260 } 261 262 fd_array = uverbs_attr_get_alloced_ptr(attrs, 263 UVERBS_ATTR_GET_CONTEXT_FD_ARR); 264 ret = ib_get_ucaps(fd_array, fd_count, &ucontext->enabled_caps); 265 if (ret) 266 goto err_uncharge; 267 } 268 269 ret = ucontext->device->ops.alloc_ucontext(ucontext, 270 &attrs->driver_udata); 271 if (ret) 272 goto err_uncharge; 273 274 rdma_restrack_add(&ucontext->res); 275 276 /* 277 * Make sure that ib_uverbs_get_ucontext() sees the pointer update 278 * only after all writes to setup the ucontext have completed 279 */ 280 smp_store_release(&file->ucontext, ucontext); 281 282 mutex_unlock(&file->ucontext_lock); 283 up_read(&file->hw_destroy_rwsem); 284 return 0; 285 286 err_uncharge: 287 ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device, 288 RDMACG_RESOURCE_HCA_HANDLE); 289 err: 290 mutex_unlock(&file->ucontext_lock); 291 up_read(&file->hw_destroy_rwsem); 292 return ret; 293 } 294 295 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs) 296 { 297 struct ib_uverbs_get_context_resp resp; 298 struct ib_uverbs_get_context cmd; 299 struct ib_device *ib_dev; 300 struct ib_uobject *uobj; 301 int ret; 302 303 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 304 if (ret) 305 return ret; 306 307 ret = ib_alloc_ucontext(attrs); 308 if (ret) 309 return ret; 310 311 uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev); 312 if (IS_ERR(uobj)) { 313 ret = PTR_ERR(uobj); 314 goto err_ucontext; 315 } 316 317 resp = (struct ib_uverbs_get_context_resp){ 318 .num_comp_vectors = attrs->ufile->device->num_comp_vectors, 319 .async_fd = uobj->id, 320 }; 321 ret = uverbs_response(attrs, &resp, sizeof(resp)); 322 if (ret) 323 goto err_uobj; 324 325 ret = ib_init_ucontext(attrs); 326 if (ret) 327 goto err_uobj; 328 329 ib_uverbs_init_async_event_file( 330 container_of(uobj, struct ib_uverbs_async_event_file, uobj)); 331 rdma_alloc_commit_uobject(uobj, attrs); 332 return 0; 333 334 err_uobj: 335 rdma_alloc_abort_uobject(uobj, attrs, false); 336 err_ucontext: 337 rdma_restrack_put(&attrs->context->res); 338 kfree(attrs->context); 339 attrs->context = NULL; 340 return ret; 341 } 342 343 static void copy_query_dev_fields(struct ib_ucontext *ucontext, 344 struct ib_uverbs_query_device_resp *resp, 345 struct ib_device_attr *attr) 346 { 347 struct ib_device *ib_dev = ucontext->device; 348 349 resp->fw_ver = attr->fw_ver; 350 resp->node_guid = ib_dev->node_guid; 351 resp->sys_image_guid = attr->sys_image_guid; 352 resp->max_mr_size = attr->max_mr_size; 353 resp->page_size_cap = attr->page_size_cap; 354 resp->vendor_id = attr->vendor_id; 355 resp->vendor_part_id = attr->vendor_part_id; 356 resp->hw_ver = attr->hw_ver; 357 resp->max_qp = attr->max_qp; 358 resp->max_qp_wr = attr->max_qp_wr; 359 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags); 360 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge); 361 resp->max_sge_rd = attr->max_sge_rd; 362 resp->max_cq = attr->max_cq; 363 resp->max_cqe = attr->max_cqe; 364 resp->max_mr = attr->max_mr; 365 resp->max_pd = attr->max_pd; 366 resp->max_qp_rd_atom = attr->max_qp_rd_atom; 367 resp->max_ee_rd_atom = attr->max_ee_rd_atom; 368 resp->max_res_rd_atom = attr->max_res_rd_atom; 369 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; 370 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; 371 resp->atomic_cap = attr->atomic_cap; 372 resp->max_ee = attr->max_ee; 373 resp->max_rdd = attr->max_rdd; 374 resp->max_mw = attr->max_mw; 375 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; 376 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; 377 resp->max_mcast_grp = attr->max_mcast_grp; 378 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; 379 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; 380 resp->max_ah = attr->max_ah; 381 resp->max_srq = attr->max_srq; 382 resp->max_srq_wr = attr->max_srq_wr; 383 resp->max_srq_sge = attr->max_srq_sge; 384 resp->max_pkeys = attr->max_pkeys; 385 resp->local_ca_ack_delay = attr->local_ca_ack_delay; 386 resp->phys_port_cnt = min_t(u32, ib_dev->phys_port_cnt, U8_MAX); 387 } 388 389 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs) 390 { 391 struct ib_uverbs_query_device cmd; 392 struct ib_uverbs_query_device_resp resp; 393 struct ib_ucontext *ucontext; 394 int ret; 395 396 ucontext = ib_uverbs_get_ucontext(attrs); 397 if (IS_ERR(ucontext)) 398 return PTR_ERR(ucontext); 399 400 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 401 if (ret) 402 return ret; 403 404 memset(&resp, 0, sizeof resp); 405 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs); 406 407 return uverbs_response(attrs, &resp, sizeof(resp)); 408 } 409 410 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs) 411 { 412 struct ib_uverbs_query_port cmd; 413 struct ib_uverbs_query_port_resp resp; 414 struct ib_port_attr attr; 415 int ret; 416 struct ib_ucontext *ucontext; 417 struct ib_device *ib_dev; 418 419 ucontext = ib_uverbs_get_ucontext(attrs); 420 if (IS_ERR(ucontext)) 421 return PTR_ERR(ucontext); 422 ib_dev = ucontext->device; 423 424 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 425 if (ret) 426 return ret; 427 428 ret = ib_query_port(ib_dev, cmd.port_num, &attr); 429 if (ret) 430 return ret; 431 432 memset(&resp, 0, sizeof resp); 433 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num); 434 435 return uverbs_response(attrs, &resp, sizeof(resp)); 436 } 437 438 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs) 439 { 440 struct ib_uverbs_alloc_pd_resp resp = {}; 441 struct ib_uverbs_alloc_pd cmd; 442 struct ib_uobject *uobj; 443 struct ib_pd *pd; 444 int ret; 445 struct ib_device *ib_dev; 446 447 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 448 if (ret) 449 return ret; 450 451 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev); 452 if (IS_ERR(uobj)) 453 return PTR_ERR(uobj); 454 455 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd); 456 if (!pd) { 457 ret = -ENOMEM; 458 goto err; 459 } 460 461 pd->device = ib_dev; 462 pd->uobject = uobj; 463 atomic_set(&pd->usecnt, 0); 464 465 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD); 466 rdma_restrack_set_name(&pd->res, NULL); 467 468 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata); 469 if (ret) 470 goto err_alloc; 471 rdma_restrack_add(&pd->res); 472 473 uobj->object = pd; 474 uobj_finalize_uobj_create(uobj, attrs); 475 476 resp.pd_handle = uobj->id; 477 return uverbs_response(attrs, &resp, sizeof(resp)); 478 479 err_alloc: 480 rdma_restrack_put(&pd->res); 481 kfree(pd); 482 err: 483 uobj_alloc_abort(uobj, attrs); 484 return ret; 485 } 486 487 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs) 488 { 489 struct ib_uverbs_dealloc_pd cmd; 490 int ret; 491 492 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 493 if (ret) 494 return ret; 495 496 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 497 } 498 499 struct xrcd_table_entry { 500 struct rb_node node; 501 struct ib_xrcd *xrcd; 502 struct inode *inode; 503 }; 504 505 static int xrcd_table_insert(struct ib_uverbs_device *dev, 506 struct inode *inode, 507 struct ib_xrcd *xrcd) 508 { 509 struct xrcd_table_entry *entry, *scan; 510 struct rb_node **p = &dev->xrcd_tree.rb_node; 511 struct rb_node *parent = NULL; 512 513 entry = kmalloc(sizeof *entry, GFP_KERNEL); 514 if (!entry) 515 return -ENOMEM; 516 517 entry->xrcd = xrcd; 518 entry->inode = inode; 519 520 while (*p) { 521 parent = *p; 522 scan = rb_entry(parent, struct xrcd_table_entry, node); 523 524 if (inode < scan->inode) { 525 p = &(*p)->rb_left; 526 } else if (inode > scan->inode) { 527 p = &(*p)->rb_right; 528 } else { 529 kfree(entry); 530 return -EEXIST; 531 } 532 } 533 534 rb_link_node(&entry->node, parent, p); 535 rb_insert_color(&entry->node, &dev->xrcd_tree); 536 igrab(inode); 537 return 0; 538 } 539 540 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, 541 struct inode *inode) 542 { 543 struct xrcd_table_entry *entry; 544 struct rb_node *p = dev->xrcd_tree.rb_node; 545 546 while (p) { 547 entry = rb_entry(p, struct xrcd_table_entry, node); 548 549 if (inode < entry->inode) 550 p = p->rb_left; 551 else if (inode > entry->inode) 552 p = p->rb_right; 553 else 554 return entry; 555 } 556 557 return NULL; 558 } 559 560 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) 561 { 562 struct xrcd_table_entry *entry; 563 564 entry = xrcd_table_search(dev, inode); 565 if (!entry) 566 return NULL; 567 568 return entry->xrcd; 569 } 570 571 static void xrcd_table_delete(struct ib_uverbs_device *dev, 572 struct inode *inode) 573 { 574 struct xrcd_table_entry *entry; 575 576 entry = xrcd_table_search(dev, inode); 577 if (entry) { 578 iput(inode); 579 rb_erase(&entry->node, &dev->xrcd_tree); 580 kfree(entry); 581 } 582 } 583 584 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs) 585 { 586 struct ib_uverbs_device *ibudev = attrs->ufile->device; 587 struct ib_uverbs_open_xrcd_resp resp = {}; 588 struct ib_uverbs_open_xrcd cmd; 589 struct ib_uxrcd_object *obj; 590 struct ib_xrcd *xrcd = NULL; 591 struct inode *inode = NULL; 592 int new_xrcd = 0; 593 struct ib_device *ib_dev; 594 struct fd f = EMPTY_FD; 595 int ret; 596 597 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 598 if (ret) 599 return ret; 600 601 mutex_lock(&ibudev->xrcd_tree_mutex); 602 603 if (cmd.fd != -1) { 604 /* search for file descriptor */ 605 f = fdget(cmd.fd); 606 if (fd_empty(f)) { 607 ret = -EBADF; 608 goto err_tree_mutex_unlock; 609 } 610 611 inode = file_inode(fd_file(f)); 612 xrcd = find_xrcd(ibudev, inode); 613 if (!xrcd && !(cmd.oflags & O_CREAT)) { 614 /* no file descriptor. Need CREATE flag */ 615 ret = -EAGAIN; 616 goto err_tree_mutex_unlock; 617 } 618 619 if (xrcd && cmd.oflags & O_EXCL) { 620 ret = -EINVAL; 621 goto err_tree_mutex_unlock; 622 } 623 } 624 625 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs, 626 &ib_dev); 627 if (IS_ERR(obj)) { 628 ret = PTR_ERR(obj); 629 goto err_tree_mutex_unlock; 630 } 631 632 if (!xrcd) { 633 xrcd = ib_alloc_xrcd_user(ib_dev, inode, &attrs->driver_udata); 634 if (IS_ERR(xrcd)) { 635 ret = PTR_ERR(xrcd); 636 goto err; 637 } 638 new_xrcd = 1; 639 } 640 641 atomic_set(&obj->refcnt, 0); 642 obj->uobject.object = xrcd; 643 644 if (inode) { 645 if (new_xrcd) { 646 /* create new inode/xrcd table entry */ 647 ret = xrcd_table_insert(ibudev, inode, xrcd); 648 if (ret) 649 goto err_dealloc_xrcd; 650 } 651 atomic_inc(&xrcd->usecnt); 652 } 653 654 fdput(f); 655 656 mutex_unlock(&ibudev->xrcd_tree_mutex); 657 uobj_finalize_uobj_create(&obj->uobject, attrs); 658 659 resp.xrcd_handle = obj->uobject.id; 660 return uverbs_response(attrs, &resp, sizeof(resp)); 661 662 err_dealloc_xrcd: 663 ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs)); 664 665 err: 666 uobj_alloc_abort(&obj->uobject, attrs); 667 668 err_tree_mutex_unlock: 669 fdput(f); 670 671 mutex_unlock(&ibudev->xrcd_tree_mutex); 672 673 return ret; 674 } 675 676 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) 677 { 678 struct ib_uverbs_close_xrcd cmd; 679 int ret; 680 681 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 682 if (ret) 683 return ret; 684 685 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); 686 } 687 688 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, 689 enum rdma_remove_reason why, 690 struct uverbs_attr_bundle *attrs) 691 { 692 struct inode *inode; 693 int ret; 694 struct ib_uverbs_device *dev = attrs->ufile->device; 695 696 inode = xrcd->inode; 697 if (inode && !atomic_dec_and_test(&xrcd->usecnt)) 698 return 0; 699 700 ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata); 701 if (ret) { 702 atomic_inc(&xrcd->usecnt); 703 return ret; 704 } 705 706 if (inode) 707 xrcd_table_delete(dev, inode); 708 709 return 0; 710 } 711 712 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) 713 { 714 struct ib_uverbs_reg_mr_resp resp = {}; 715 struct ib_uverbs_reg_mr cmd; 716 struct ib_uobject *uobj; 717 struct ib_pd *pd; 718 struct ib_mr *mr; 719 int ret; 720 struct ib_device *ib_dev; 721 722 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 723 if (ret) 724 return ret; 725 726 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 727 return -EINVAL; 728 729 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 730 if (IS_ERR(uobj)) 731 return PTR_ERR(uobj); 732 733 ret = ib_check_mr_access(ib_dev, cmd.access_flags); 734 if (ret) 735 goto err_free; 736 737 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 738 if (IS_ERR(pd)) { 739 ret = PTR_ERR(pd); 740 goto err_free; 741 } 742 743 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 744 cmd.access_flags, 745 &attrs->driver_udata); 746 if (IS_ERR(mr)) { 747 ret = PTR_ERR(mr); 748 goto err_put; 749 } 750 751 mr->device = pd->device; 752 mr->pd = pd; 753 mr->type = IB_MR_TYPE_USER; 754 mr->dm = NULL; 755 mr->sig_attrs = NULL; 756 mr->uobject = uobj; 757 atomic_inc(&pd->usecnt); 758 mr->iova = cmd.hca_va; 759 mr->length = cmd.length; 760 761 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 762 rdma_restrack_set_name(&mr->res, NULL); 763 rdma_restrack_add(&mr->res); 764 765 uobj->object = mr; 766 uobj_put_obj_read(pd); 767 uobj_finalize_uobj_create(uobj, attrs); 768 769 resp.lkey = mr->lkey; 770 resp.rkey = mr->rkey; 771 resp.mr_handle = uobj->id; 772 return uverbs_response(attrs, &resp, sizeof(resp)); 773 774 err_put: 775 uobj_put_obj_read(pd); 776 err_free: 777 uobj_alloc_abort(uobj, attrs); 778 return ret; 779 } 780 781 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 782 { 783 struct ib_uverbs_rereg_mr cmd; 784 struct ib_uverbs_rereg_mr_resp resp; 785 struct ib_mr *mr; 786 int ret; 787 struct ib_uobject *uobj; 788 struct ib_uobject *new_uobj; 789 struct ib_device *ib_dev; 790 struct ib_pd *orig_pd; 791 struct ib_pd *new_pd; 792 struct ib_mr *new_mr; 793 794 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 795 if (ret) 796 return ret; 797 798 if (!cmd.flags) 799 return -EINVAL; 800 801 if (cmd.flags & ~IB_MR_REREG_SUPPORTED) 802 return -EOPNOTSUPP; 803 804 if ((cmd.flags & IB_MR_REREG_TRANS) && 805 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 806 return -EINVAL; 807 808 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 809 if (IS_ERR(uobj)) 810 return PTR_ERR(uobj); 811 812 mr = uobj->object; 813 814 if (mr->dm) { 815 ret = -EINVAL; 816 goto put_uobjs; 817 } 818 819 if (cmd.flags & IB_MR_REREG_ACCESS) { 820 ret = ib_check_mr_access(mr->device, cmd.access_flags); 821 if (ret) 822 goto put_uobjs; 823 } 824 825 orig_pd = mr->pd; 826 if (cmd.flags & IB_MR_REREG_PD) { 827 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 828 attrs); 829 if (IS_ERR(new_pd)) { 830 ret = PTR_ERR(new_pd); 831 goto put_uobjs; 832 } 833 } else { 834 new_pd = mr->pd; 835 } 836 837 /* 838 * The driver might create a new HW object as part of the rereg, we need 839 * to have a uobject ready to hold it. 840 */ 841 new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 842 if (IS_ERR(new_uobj)) { 843 ret = PTR_ERR(new_uobj); 844 goto put_uobj_pd; 845 } 846 847 new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length, 848 cmd.hca_va, cmd.access_flags, new_pd, 849 &attrs->driver_udata); 850 if (IS_ERR(new_mr)) { 851 ret = PTR_ERR(new_mr); 852 goto put_new_uobj; 853 } 854 if (new_mr) { 855 new_mr->device = new_pd->device; 856 new_mr->pd = new_pd; 857 new_mr->type = IB_MR_TYPE_USER; 858 new_mr->uobject = uobj; 859 atomic_inc(&new_pd->usecnt); 860 new_uobj->object = new_mr; 861 862 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR); 863 rdma_restrack_set_name(&new_mr->res, NULL); 864 rdma_restrack_add(&new_mr->res); 865 866 /* 867 * The new uobj for the new HW object is put into the same spot 868 * in the IDR and the old uobj & HW object is deleted. 869 */ 870 rdma_assign_uobject(uobj, new_uobj, attrs); 871 rdma_alloc_commit_uobject(new_uobj, attrs); 872 uobj_put_destroy(uobj); 873 new_uobj = NULL; 874 uobj = NULL; 875 mr = new_mr; 876 } else { 877 if (cmd.flags & IB_MR_REREG_PD) { 878 atomic_dec(&orig_pd->usecnt); 879 mr->pd = new_pd; 880 atomic_inc(&new_pd->usecnt); 881 } 882 if (cmd.flags & IB_MR_REREG_TRANS) { 883 mr->iova = cmd.hca_va; 884 mr->length = cmd.length; 885 } 886 } 887 888 memset(&resp, 0, sizeof(resp)); 889 resp.lkey = mr->lkey; 890 resp.rkey = mr->rkey; 891 892 ret = uverbs_response(attrs, &resp, sizeof(resp)); 893 894 put_new_uobj: 895 if (new_uobj) 896 uobj_alloc_abort(new_uobj, attrs); 897 put_uobj_pd: 898 if (cmd.flags & IB_MR_REREG_PD) 899 uobj_put_obj_read(new_pd); 900 901 put_uobjs: 902 if (uobj) 903 uobj_put_write(uobj); 904 905 return ret; 906 } 907 908 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) 909 { 910 struct ib_uverbs_dereg_mr cmd; 911 int ret; 912 913 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 914 if (ret) 915 return ret; 916 917 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 918 } 919 920 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 921 { 922 struct ib_uverbs_alloc_mw cmd; 923 struct ib_uverbs_alloc_mw_resp resp = {}; 924 struct ib_uobject *uobj; 925 struct ib_pd *pd; 926 struct ib_mw *mw; 927 int ret; 928 struct ib_device *ib_dev; 929 930 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 931 if (ret) 932 return ret; 933 934 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 935 if (IS_ERR(uobj)) 936 return PTR_ERR(uobj); 937 938 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 939 if (IS_ERR(pd)) { 940 ret = PTR_ERR(pd); 941 goto err_free; 942 } 943 944 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 945 ret = -EINVAL; 946 goto err_put; 947 } 948 949 mw = rdma_zalloc_drv_obj(ib_dev, ib_mw); 950 if (!mw) { 951 ret = -ENOMEM; 952 goto err_put; 953 } 954 955 mw->device = ib_dev; 956 mw->pd = pd; 957 mw->uobject = uobj; 958 mw->type = cmd.mw_type; 959 960 ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata); 961 if (ret) 962 goto err_alloc; 963 964 atomic_inc(&pd->usecnt); 965 966 uobj->object = mw; 967 uobj_put_obj_read(pd); 968 uobj_finalize_uobj_create(uobj, attrs); 969 970 resp.rkey = mw->rkey; 971 resp.mw_handle = uobj->id; 972 return uverbs_response(attrs, &resp, sizeof(resp)); 973 974 err_alloc: 975 kfree(mw); 976 err_put: 977 uobj_put_obj_read(pd); 978 err_free: 979 uobj_alloc_abort(uobj, attrs); 980 return ret; 981 } 982 983 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) 984 { 985 struct ib_uverbs_dealloc_mw cmd; 986 int ret; 987 988 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 989 if (ret) 990 return ret; 991 992 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); 993 } 994 995 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) 996 { 997 struct ib_uverbs_create_comp_channel cmd; 998 struct ib_uverbs_create_comp_channel_resp resp; 999 struct ib_uobject *uobj; 1000 struct ib_uverbs_completion_event_file *ev_file; 1001 struct ib_device *ib_dev; 1002 int ret; 1003 1004 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1005 if (ret) 1006 return ret; 1007 1008 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); 1009 if (IS_ERR(uobj)) 1010 return PTR_ERR(uobj); 1011 1012 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, 1013 uobj); 1014 ib_uverbs_init_event_queue(&ev_file->ev_queue); 1015 uobj_finalize_uobj_create(uobj, attrs); 1016 1017 resp.fd = uobj->id; 1018 return uverbs_response(attrs, &resp, sizeof(resp)); 1019 } 1020 1021 static int create_cq(struct uverbs_attr_bundle *attrs, 1022 struct ib_uverbs_ex_create_cq *cmd) 1023 { 1024 struct ib_ucq_object *obj; 1025 struct ib_uverbs_completion_event_file *ev_file = NULL; 1026 struct ib_cq *cq; 1027 int ret; 1028 struct ib_uverbs_ex_create_cq_resp resp = {}; 1029 struct ib_cq_init_attr attr = {}; 1030 struct ib_device *ib_dev; 1031 1032 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) 1033 return -EINVAL; 1034 1035 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, 1036 &ib_dev); 1037 if (IS_ERR(obj)) 1038 return PTR_ERR(obj); 1039 1040 if (cmd->comp_channel >= 0) { 1041 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); 1042 if (IS_ERR(ev_file)) { 1043 ret = PTR_ERR(ev_file); 1044 goto err; 1045 } 1046 } 1047 1048 obj->uevent.uobject.user_handle = cmd->user_handle; 1049 INIT_LIST_HEAD(&obj->comp_list); 1050 INIT_LIST_HEAD(&obj->uevent.event_list); 1051 1052 attr.cqe = cmd->cqe; 1053 attr.comp_vector = cmd->comp_vector; 1054 attr.flags = cmd->flags; 1055 1056 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 1057 if (!cq) { 1058 ret = -ENOMEM; 1059 goto err_file; 1060 } 1061 cq->device = ib_dev; 1062 cq->uobject = obj; 1063 cq->comp_handler = ib_uverbs_comp_handler; 1064 cq->event_handler = ib_uverbs_cq_event_handler; 1065 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 1066 atomic_set(&cq->usecnt, 0); 1067 1068 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ); 1069 rdma_restrack_set_name(&cq->res, NULL); 1070 1071 ret = ib_dev->ops.create_cq(cq, &attr, attrs); 1072 if (ret) 1073 goto err_free; 1074 rdma_restrack_add(&cq->res); 1075 1076 obj->uevent.uobject.object = cq; 1077 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1078 if (obj->uevent.event_file) 1079 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1080 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1081 1082 resp.base.cq_handle = obj->uevent.uobject.id; 1083 resp.base.cqe = cq->cqe; 1084 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1085 return uverbs_response(attrs, &resp, sizeof(resp)); 1086 1087 err_free: 1088 rdma_restrack_put(&cq->res); 1089 kfree(cq); 1090 err_file: 1091 if (ev_file) 1092 ib_uverbs_release_ucq(ev_file, obj); 1093 err: 1094 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1095 return ret; 1096 } 1097 1098 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) 1099 { 1100 struct ib_uverbs_create_cq cmd; 1101 struct ib_uverbs_ex_create_cq cmd_ex; 1102 int ret; 1103 1104 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1105 if (ret) 1106 return ret; 1107 1108 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1109 cmd_ex.user_handle = cmd.user_handle; 1110 cmd_ex.cqe = cmd.cqe; 1111 cmd_ex.comp_vector = cmd.comp_vector; 1112 cmd_ex.comp_channel = cmd.comp_channel; 1113 1114 return create_cq(attrs, &cmd_ex); 1115 } 1116 1117 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) 1118 { 1119 struct ib_uverbs_ex_create_cq cmd; 1120 int ret; 1121 1122 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1123 if (ret) 1124 return ret; 1125 1126 if (cmd.comp_mask) 1127 return -EINVAL; 1128 1129 if (cmd.reserved) 1130 return -EINVAL; 1131 1132 return create_cq(attrs, &cmd); 1133 } 1134 1135 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) 1136 { 1137 struct ib_uverbs_resize_cq cmd; 1138 struct ib_uverbs_resize_cq_resp resp = {}; 1139 struct ib_cq *cq; 1140 int ret; 1141 1142 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1143 if (ret) 1144 return ret; 1145 1146 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1147 if (IS_ERR(cq)) 1148 return PTR_ERR(cq); 1149 1150 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); 1151 if (ret) 1152 goto out; 1153 1154 resp.cqe = cq->cqe; 1155 1156 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1157 out: 1158 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1159 UVERBS_LOOKUP_READ); 1160 1161 return ret; 1162 } 1163 1164 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1165 struct ib_wc *wc) 1166 { 1167 struct ib_uverbs_wc tmp; 1168 1169 tmp.wr_id = wc->wr_id; 1170 tmp.status = wc->status; 1171 tmp.opcode = wc->opcode; 1172 tmp.vendor_err = wc->vendor_err; 1173 tmp.byte_len = wc->byte_len; 1174 tmp.ex.imm_data = wc->ex.imm_data; 1175 tmp.qp_num = wc->qp->qp_num; 1176 tmp.src_qp = wc->src_qp; 1177 tmp.wc_flags = wc->wc_flags; 1178 tmp.pkey_index = wc->pkey_index; 1179 if (rdma_cap_opa_ah(ib_dev, wc->port_num)) 1180 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); 1181 else 1182 tmp.slid = ib_lid_cpu16(wc->slid); 1183 tmp.sl = wc->sl; 1184 tmp.dlid_path_bits = wc->dlid_path_bits; 1185 tmp.port_num = wc->port_num; 1186 tmp.reserved = 0; 1187 1188 if (copy_to_user(dest, &tmp, sizeof tmp)) 1189 return -EFAULT; 1190 1191 return 0; 1192 } 1193 1194 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1195 { 1196 struct ib_uverbs_poll_cq cmd; 1197 struct ib_uverbs_poll_cq_resp resp; 1198 u8 __user *header_ptr; 1199 u8 __user *data_ptr; 1200 struct ib_cq *cq; 1201 struct ib_wc wc; 1202 int ret; 1203 1204 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1205 if (ret) 1206 return ret; 1207 1208 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1209 if (IS_ERR(cq)) 1210 return PTR_ERR(cq); 1211 1212 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1213 header_ptr = attrs->ucore.outbuf; 1214 data_ptr = header_ptr + sizeof resp; 1215 1216 memset(&resp, 0, sizeof resp); 1217 while (resp.count < cmd.ne) { 1218 ret = ib_poll_cq(cq, 1, &wc); 1219 if (ret < 0) 1220 goto out_put; 1221 if (!ret) 1222 break; 1223 1224 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1225 if (ret) 1226 goto out_put; 1227 1228 data_ptr += sizeof(struct ib_uverbs_wc); 1229 ++resp.count; 1230 } 1231 1232 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1233 ret = -EFAULT; 1234 goto out_put; 1235 } 1236 ret = 0; 1237 1238 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1239 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1240 1241 out_put: 1242 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1243 UVERBS_LOOKUP_READ); 1244 return ret; 1245 } 1246 1247 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1248 { 1249 struct ib_uverbs_req_notify_cq cmd; 1250 struct ib_cq *cq; 1251 int ret; 1252 1253 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1254 if (ret) 1255 return ret; 1256 1257 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1258 if (IS_ERR(cq)) 1259 return PTR_ERR(cq); 1260 1261 ib_req_notify_cq(cq, cmd.solicited_only ? 1262 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1263 1264 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1265 UVERBS_LOOKUP_READ); 1266 return 0; 1267 } 1268 1269 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1270 { 1271 struct ib_uverbs_destroy_cq cmd; 1272 struct ib_uverbs_destroy_cq_resp resp; 1273 struct ib_uobject *uobj; 1274 struct ib_ucq_object *obj; 1275 int ret; 1276 1277 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1278 if (ret) 1279 return ret; 1280 1281 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1282 if (IS_ERR(uobj)) 1283 return PTR_ERR(uobj); 1284 1285 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject); 1286 memset(&resp, 0, sizeof(resp)); 1287 resp.comp_events_reported = obj->comp_events_reported; 1288 resp.async_events_reported = obj->uevent.events_reported; 1289 1290 uobj_put_destroy(uobj); 1291 1292 return uverbs_response(attrs, &resp, sizeof(resp)); 1293 } 1294 1295 static int create_qp(struct uverbs_attr_bundle *attrs, 1296 struct ib_uverbs_ex_create_qp *cmd) 1297 { 1298 struct ib_uqp_object *obj; 1299 struct ib_device *device; 1300 struct ib_pd *pd = NULL; 1301 struct ib_xrcd *xrcd = NULL; 1302 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1303 struct ib_cq *scq = NULL, *rcq = NULL; 1304 struct ib_srq *srq = NULL; 1305 struct ib_qp *qp; 1306 struct ib_qp_init_attr attr = {}; 1307 struct ib_uverbs_ex_create_qp_resp resp = {}; 1308 int ret; 1309 struct ib_rwq_ind_table *ind_tbl = NULL; 1310 bool has_sq = true; 1311 struct ib_device *ib_dev; 1312 1313 switch (cmd->qp_type) { 1314 case IB_QPT_RAW_PACKET: 1315 if (!capable(CAP_NET_RAW)) 1316 return -EPERM; 1317 break; 1318 case IB_QPT_RC: 1319 case IB_QPT_UC: 1320 case IB_QPT_UD: 1321 case IB_QPT_XRC_INI: 1322 case IB_QPT_XRC_TGT: 1323 case IB_QPT_DRIVER: 1324 break; 1325 default: 1326 return -EINVAL; 1327 } 1328 1329 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1330 &ib_dev); 1331 if (IS_ERR(obj)) 1332 return PTR_ERR(obj); 1333 obj->uxrcd = NULL; 1334 obj->uevent.uobject.user_handle = cmd->user_handle; 1335 mutex_init(&obj->mcast_lock); 1336 1337 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1338 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1339 UVERBS_OBJECT_RWQ_IND_TBL, 1340 cmd->rwq_ind_tbl_handle, attrs); 1341 if (IS_ERR(ind_tbl)) { 1342 ret = PTR_ERR(ind_tbl); 1343 goto err_put; 1344 } 1345 1346 attr.rwq_ind_tbl = ind_tbl; 1347 } 1348 1349 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1350 ret = -EINVAL; 1351 goto err_put; 1352 } 1353 1354 if (ind_tbl && !cmd->max_send_wr) 1355 has_sq = false; 1356 1357 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1358 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1359 attrs); 1360 1361 if (IS_ERR(xrcd_uobj)) { 1362 ret = -EINVAL; 1363 goto err_put; 1364 } 1365 1366 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1367 if (!xrcd) { 1368 ret = -EINVAL; 1369 goto err_put; 1370 } 1371 device = xrcd->device; 1372 } else { 1373 if (cmd->qp_type == IB_QPT_XRC_INI) { 1374 cmd->max_recv_wr = 0; 1375 cmd->max_recv_sge = 0; 1376 } else { 1377 if (cmd->is_srq) { 1378 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1379 cmd->srq_handle, attrs); 1380 if (IS_ERR(srq) || 1381 srq->srq_type == IB_SRQT_XRC) { 1382 ret = IS_ERR(srq) ? PTR_ERR(srq) : 1383 -EINVAL; 1384 goto err_put; 1385 } 1386 } 1387 1388 if (!ind_tbl) { 1389 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1390 rcq = uobj_get_obj_read( 1391 cq, UVERBS_OBJECT_CQ, 1392 cmd->recv_cq_handle, attrs); 1393 if (IS_ERR(rcq)) { 1394 ret = PTR_ERR(rcq); 1395 goto err_put; 1396 } 1397 } 1398 } 1399 } 1400 1401 if (has_sq) { 1402 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1403 cmd->send_cq_handle, attrs); 1404 if (IS_ERR(scq)) { 1405 ret = PTR_ERR(scq); 1406 goto err_put; 1407 } 1408 } 1409 1410 if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI) 1411 rcq = rcq ?: scq; 1412 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1413 attrs); 1414 if (IS_ERR(pd)) { 1415 ret = PTR_ERR(pd); 1416 goto err_put; 1417 } 1418 1419 device = pd->device; 1420 } 1421 1422 attr.event_handler = ib_uverbs_qp_event_handler; 1423 attr.send_cq = scq; 1424 attr.recv_cq = rcq; 1425 attr.srq = srq; 1426 attr.xrcd = xrcd; 1427 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1428 IB_SIGNAL_REQ_WR; 1429 attr.qp_type = cmd->qp_type; 1430 1431 attr.cap.max_send_wr = cmd->max_send_wr; 1432 attr.cap.max_recv_wr = cmd->max_recv_wr; 1433 attr.cap.max_send_sge = cmd->max_send_sge; 1434 attr.cap.max_recv_sge = cmd->max_recv_sge; 1435 attr.cap.max_inline_data = cmd->max_inline_data; 1436 1437 INIT_LIST_HEAD(&obj->uevent.event_list); 1438 INIT_LIST_HEAD(&obj->mcast_list); 1439 1440 attr.create_flags = cmd->create_flags; 1441 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1442 IB_QP_CREATE_CROSS_CHANNEL | 1443 IB_QP_CREATE_MANAGED_SEND | 1444 IB_QP_CREATE_MANAGED_RECV | 1445 IB_QP_CREATE_SCATTER_FCS | 1446 IB_QP_CREATE_CVLAN_STRIPPING | 1447 IB_QP_CREATE_SOURCE_QPN | 1448 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1449 ret = -EINVAL; 1450 goto err_put; 1451 } 1452 1453 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1454 if (!capable(CAP_NET_RAW)) { 1455 ret = -EPERM; 1456 goto err_put; 1457 } 1458 1459 attr.source_qpn = cmd->source_qpn; 1460 } 1461 1462 qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj, 1463 KBUILD_MODNAME); 1464 if (IS_ERR(qp)) { 1465 ret = PTR_ERR(qp); 1466 goto err_put; 1467 } 1468 ib_qp_usecnt_inc(qp); 1469 1470 obj->uevent.uobject.object = qp; 1471 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 1472 if (obj->uevent.event_file) 1473 uverbs_uobject_get(&obj->uevent.event_file->uobj); 1474 1475 if (xrcd) { 1476 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1477 uobject); 1478 atomic_inc(&obj->uxrcd->refcnt); 1479 uobj_put_read(xrcd_uobj); 1480 } 1481 1482 if (pd) 1483 uobj_put_obj_read(pd); 1484 if (scq) 1485 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1486 UVERBS_LOOKUP_READ); 1487 if (rcq && rcq != scq) 1488 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1489 UVERBS_LOOKUP_READ); 1490 if (srq) 1491 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1492 UVERBS_LOOKUP_READ); 1493 if (ind_tbl) 1494 uobj_put_obj_read(ind_tbl); 1495 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1496 1497 resp.base.qpn = qp->qp_num; 1498 resp.base.qp_handle = obj->uevent.uobject.id; 1499 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1500 resp.base.max_send_sge = attr.cap.max_send_sge; 1501 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1502 resp.base.max_send_wr = attr.cap.max_send_wr; 1503 resp.base.max_inline_data = attr.cap.max_inline_data; 1504 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1505 return uverbs_response(attrs, &resp, sizeof(resp)); 1506 1507 err_put: 1508 if (!IS_ERR(xrcd_uobj)) 1509 uobj_put_read(xrcd_uobj); 1510 if (!IS_ERR_OR_NULL(pd)) 1511 uobj_put_obj_read(pd); 1512 if (!IS_ERR_OR_NULL(scq)) 1513 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1514 UVERBS_LOOKUP_READ); 1515 if (!IS_ERR_OR_NULL(rcq) && rcq != scq) 1516 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1517 UVERBS_LOOKUP_READ); 1518 if (!IS_ERR_OR_NULL(srq)) 1519 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1520 UVERBS_LOOKUP_READ); 1521 if (!IS_ERR_OR_NULL(ind_tbl)) 1522 uobj_put_obj_read(ind_tbl); 1523 1524 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1525 return ret; 1526 } 1527 1528 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1529 { 1530 struct ib_uverbs_create_qp cmd; 1531 struct ib_uverbs_ex_create_qp cmd_ex; 1532 int ret; 1533 1534 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1535 if (ret) 1536 return ret; 1537 1538 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1539 cmd_ex.user_handle = cmd.user_handle; 1540 cmd_ex.pd_handle = cmd.pd_handle; 1541 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1542 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1543 cmd_ex.srq_handle = cmd.srq_handle; 1544 cmd_ex.max_send_wr = cmd.max_send_wr; 1545 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1546 cmd_ex.max_send_sge = cmd.max_send_sge; 1547 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1548 cmd_ex.max_inline_data = cmd.max_inline_data; 1549 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1550 cmd_ex.qp_type = cmd.qp_type; 1551 cmd_ex.is_srq = cmd.is_srq; 1552 1553 return create_qp(attrs, &cmd_ex); 1554 } 1555 1556 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1557 { 1558 struct ib_uverbs_ex_create_qp cmd; 1559 int ret; 1560 1561 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1562 if (ret) 1563 return ret; 1564 1565 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1566 return -EINVAL; 1567 1568 if (cmd.reserved) 1569 return -EINVAL; 1570 1571 return create_qp(attrs, &cmd); 1572 } 1573 1574 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1575 { 1576 struct ib_uverbs_create_qp_resp resp = {}; 1577 struct ib_uverbs_open_qp cmd; 1578 struct ib_uqp_object *obj; 1579 struct ib_xrcd *xrcd; 1580 struct ib_qp *qp; 1581 struct ib_qp_open_attr attr = {}; 1582 int ret; 1583 struct ib_uobject *xrcd_uobj; 1584 struct ib_device *ib_dev; 1585 1586 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1587 if (ret) 1588 return ret; 1589 1590 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1591 &ib_dev); 1592 if (IS_ERR(obj)) 1593 return PTR_ERR(obj); 1594 1595 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1596 if (IS_ERR(xrcd_uobj)) { 1597 ret = -EINVAL; 1598 goto err_put; 1599 } 1600 1601 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1602 if (!xrcd) { 1603 ret = -EINVAL; 1604 goto err_xrcd; 1605 } 1606 1607 attr.event_handler = ib_uverbs_qp_event_handler; 1608 attr.qp_num = cmd.qpn; 1609 attr.qp_type = cmd.qp_type; 1610 1611 INIT_LIST_HEAD(&obj->uevent.event_list); 1612 INIT_LIST_HEAD(&obj->mcast_list); 1613 1614 qp = ib_open_qp(xrcd, &attr); 1615 if (IS_ERR(qp)) { 1616 ret = PTR_ERR(qp); 1617 goto err_xrcd; 1618 } 1619 1620 obj->uevent.uobject.object = qp; 1621 obj->uevent.uobject.user_handle = cmd.user_handle; 1622 1623 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1624 atomic_inc(&obj->uxrcd->refcnt); 1625 qp->uobject = obj; 1626 uobj_put_read(xrcd_uobj); 1627 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 1628 1629 resp.qpn = qp->qp_num; 1630 resp.qp_handle = obj->uevent.uobject.id; 1631 return uverbs_response(attrs, &resp, sizeof(resp)); 1632 1633 err_xrcd: 1634 uobj_put_read(xrcd_uobj); 1635 err_put: 1636 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1637 return ret; 1638 } 1639 1640 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, 1641 struct rdma_ah_attr *rdma_attr) 1642 { 1643 const struct ib_global_route *grh; 1644 1645 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr); 1646 uverb_attr->sl = rdma_ah_get_sl(rdma_attr); 1647 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr); 1648 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr); 1649 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) & 1650 IB_AH_GRH); 1651 if (uverb_attr->is_global) { 1652 grh = rdma_ah_read_grh(rdma_attr); 1653 memcpy(uverb_attr->dgid, grh->dgid.raw, 16); 1654 uverb_attr->flow_label = grh->flow_label; 1655 uverb_attr->sgid_index = grh->sgid_index; 1656 uverb_attr->hop_limit = grh->hop_limit; 1657 uverb_attr->traffic_class = grh->traffic_class; 1658 } 1659 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr); 1660 } 1661 1662 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) 1663 { 1664 struct ib_uverbs_query_qp cmd; 1665 struct ib_uverbs_query_qp_resp resp; 1666 struct ib_qp *qp; 1667 struct ib_qp_attr *attr; 1668 struct ib_qp_init_attr *init_attr; 1669 int ret; 1670 1671 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1672 if (ret) 1673 return ret; 1674 1675 attr = kmalloc(sizeof *attr, GFP_KERNEL); 1676 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 1677 if (!attr || !init_attr) { 1678 ret = -ENOMEM; 1679 goto out; 1680 } 1681 1682 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1683 if (IS_ERR(qp)) { 1684 ret = PTR_ERR(qp); 1685 goto out; 1686 } 1687 1688 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1689 1690 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1691 UVERBS_LOOKUP_READ); 1692 1693 if (ret) 1694 goto out; 1695 1696 memset(&resp, 0, sizeof resp); 1697 1698 resp.qp_state = attr->qp_state; 1699 resp.cur_qp_state = attr->cur_qp_state; 1700 resp.path_mtu = attr->path_mtu; 1701 resp.path_mig_state = attr->path_mig_state; 1702 resp.qkey = attr->qkey; 1703 resp.rq_psn = attr->rq_psn; 1704 resp.sq_psn = attr->sq_psn; 1705 resp.dest_qp_num = attr->dest_qp_num; 1706 resp.qp_access_flags = attr->qp_access_flags; 1707 resp.pkey_index = attr->pkey_index; 1708 resp.alt_pkey_index = attr->alt_pkey_index; 1709 resp.sq_draining = attr->sq_draining; 1710 resp.max_rd_atomic = attr->max_rd_atomic; 1711 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1712 resp.min_rnr_timer = attr->min_rnr_timer; 1713 resp.port_num = attr->port_num; 1714 resp.timeout = attr->timeout; 1715 resp.retry_cnt = attr->retry_cnt; 1716 resp.rnr_retry = attr->rnr_retry; 1717 resp.alt_port_num = attr->alt_port_num; 1718 resp.alt_timeout = attr->alt_timeout; 1719 1720 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1721 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1722 1723 resp.max_send_wr = init_attr->cap.max_send_wr; 1724 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1725 resp.max_send_sge = init_attr->cap.max_send_sge; 1726 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1727 resp.max_inline_data = init_attr->cap.max_inline_data; 1728 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1729 1730 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1731 1732 out: 1733 kfree(attr); 1734 kfree(init_attr); 1735 1736 return ret; 1737 } 1738 1739 /* Remove ignored fields set in the attribute mask */ 1740 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1741 { 1742 switch (qp_type) { 1743 case IB_QPT_XRC_INI: 1744 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1745 case IB_QPT_XRC_TGT: 1746 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1747 IB_QP_RNR_RETRY); 1748 default: 1749 return mask; 1750 } 1751 } 1752 1753 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1754 struct rdma_ah_attr *rdma_attr, 1755 struct ib_uverbs_qp_dest *uverb_attr) 1756 { 1757 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); 1758 if (uverb_attr->is_global) { 1759 rdma_ah_set_grh(rdma_attr, NULL, 1760 uverb_attr->flow_label, 1761 uverb_attr->sgid_index, 1762 uverb_attr->hop_limit, 1763 uverb_attr->traffic_class); 1764 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); 1765 } else { 1766 rdma_ah_set_ah_flags(rdma_attr, 0); 1767 } 1768 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); 1769 rdma_ah_set_sl(rdma_attr, uverb_attr->sl); 1770 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); 1771 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); 1772 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); 1773 rdma_ah_set_make_grd(rdma_attr, false); 1774 } 1775 1776 static int modify_qp(struct uverbs_attr_bundle *attrs, 1777 struct ib_uverbs_ex_modify_qp *cmd) 1778 { 1779 struct ib_qp_attr *attr; 1780 struct ib_qp *qp; 1781 int ret; 1782 1783 attr = kzalloc(sizeof(*attr), GFP_KERNEL); 1784 if (!attr) 1785 return -ENOMEM; 1786 1787 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1788 attrs); 1789 if (IS_ERR(qp)) { 1790 ret = PTR_ERR(qp); 1791 goto out; 1792 } 1793 1794 if ((cmd->base.attr_mask & IB_QP_PORT) && 1795 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1796 ret = -EINVAL; 1797 goto release_qp; 1798 } 1799 1800 if ((cmd->base.attr_mask & IB_QP_AV)) { 1801 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1802 ret = -EINVAL; 1803 goto release_qp; 1804 } 1805 1806 if (cmd->base.attr_mask & IB_QP_STATE && 1807 cmd->base.qp_state == IB_QPS_RTR) { 1808 /* We are in INIT->RTR TRANSITION (if we are not, 1809 * this transition will be rejected in subsequent checks). 1810 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1811 * but the IB_QP_STATE flag is required. 1812 * 1813 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1814 * when IB_QP_AV is set, has required inclusion of a valid 1815 * port number in the primary AV. (AVs are created and handled 1816 * differently for infiniband and ethernet (RoCE) ports). 1817 * 1818 * Check the port number included in the primary AV against 1819 * the port number in the qp struct, which was set (and saved) 1820 * in the RST->INIT transition. 1821 */ 1822 if (cmd->base.dest.port_num != qp->real_qp->port) { 1823 ret = -EINVAL; 1824 goto release_qp; 1825 } 1826 } else { 1827 /* We are in SQD->SQD. (If we are not, this transition will 1828 * be rejected later in the verbs layer checks). 1829 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1830 * together in the SQD->SQD transition. 1831 * 1832 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1833 * verbs layer driver does not track primary port changes 1834 * resulting from path migration. Thus, in SQD, if the primary 1835 * AV is modified, the primary port should also be modified). 1836 * 1837 * Note that in this transition, the IB_QP_STATE flag 1838 * is not allowed. 1839 */ 1840 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1841 == (IB_QP_AV | IB_QP_PORT)) && 1842 cmd->base.port_num != cmd->base.dest.port_num) { 1843 ret = -EINVAL; 1844 goto release_qp; 1845 } 1846 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1847 == IB_QP_AV) { 1848 cmd->base.attr_mask |= IB_QP_PORT; 1849 cmd->base.port_num = cmd->base.dest.port_num; 1850 } 1851 } 1852 } 1853 1854 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1855 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1856 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1857 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1858 ret = -EINVAL; 1859 goto release_qp; 1860 } 1861 1862 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1863 cmd->base.cur_qp_state > IB_QPS_ERR) || 1864 (cmd->base.attr_mask & IB_QP_STATE && 1865 cmd->base.qp_state > IB_QPS_ERR)) { 1866 ret = -EINVAL; 1867 goto release_qp; 1868 } 1869 1870 if (cmd->base.attr_mask & IB_QP_STATE) 1871 attr->qp_state = cmd->base.qp_state; 1872 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1873 attr->cur_qp_state = cmd->base.cur_qp_state; 1874 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1875 attr->path_mtu = cmd->base.path_mtu; 1876 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1877 attr->path_mig_state = cmd->base.path_mig_state; 1878 if (cmd->base.attr_mask & IB_QP_QKEY) { 1879 if (cmd->base.qkey & IB_QP_SET_QKEY && 1880 !rdma_nl_get_privileged_qkey()) { 1881 ret = -EPERM; 1882 goto release_qp; 1883 } 1884 attr->qkey = cmd->base.qkey; 1885 } 1886 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1887 attr->rq_psn = cmd->base.rq_psn; 1888 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1889 attr->sq_psn = cmd->base.sq_psn; 1890 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1891 attr->dest_qp_num = cmd->base.dest_qp_num; 1892 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1893 attr->qp_access_flags = cmd->base.qp_access_flags; 1894 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1895 attr->pkey_index = cmd->base.pkey_index; 1896 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1897 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1898 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1899 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1900 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1901 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1902 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1903 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1904 if (cmd->base.attr_mask & IB_QP_PORT) 1905 attr->port_num = cmd->base.port_num; 1906 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1907 attr->timeout = cmd->base.timeout; 1908 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1909 attr->retry_cnt = cmd->base.retry_cnt; 1910 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1911 attr->rnr_retry = cmd->base.rnr_retry; 1912 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1913 attr->alt_port_num = cmd->base.alt_port_num; 1914 attr->alt_timeout = cmd->base.alt_timeout; 1915 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1916 } 1917 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1918 attr->rate_limit = cmd->rate_limit; 1919 1920 if (cmd->base.attr_mask & IB_QP_AV) 1921 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1922 &cmd->base.dest); 1923 1924 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1925 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1926 &cmd->base.alt_dest); 1927 1928 ret = ib_modify_qp_with_udata(qp, attr, 1929 modify_qp_mask(qp->qp_type, 1930 cmd->base.attr_mask), 1931 &attrs->driver_udata); 1932 1933 release_qp: 1934 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1935 UVERBS_LOOKUP_READ); 1936 out: 1937 kfree(attr); 1938 1939 return ret; 1940 } 1941 1942 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1943 { 1944 struct ib_uverbs_ex_modify_qp cmd; 1945 int ret; 1946 1947 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1948 if (ret) 1949 return ret; 1950 1951 if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 1952 return -EOPNOTSUPP; 1953 1954 return modify_qp(attrs, &cmd); 1955 } 1956 1957 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1958 { 1959 struct ib_uverbs_ex_modify_qp cmd; 1960 struct ib_uverbs_ex_modify_qp_resp resp = { 1961 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1962 }; 1963 int ret; 1964 1965 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1966 if (ret) 1967 return ret; 1968 1969 /* 1970 * Last bit is reserved for extending the attr_mask by 1971 * using another field. 1972 */ 1973 if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT)) 1974 return -EOPNOTSUPP; 1975 1976 ret = modify_qp(attrs, &cmd); 1977 if (ret) 1978 return ret; 1979 1980 return uverbs_response(attrs, &resp, sizeof(resp)); 1981 } 1982 1983 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1984 { 1985 struct ib_uverbs_destroy_qp cmd; 1986 struct ib_uverbs_destroy_qp_resp resp; 1987 struct ib_uobject *uobj; 1988 struct ib_uqp_object *obj; 1989 int ret; 1990 1991 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1992 if (ret) 1993 return ret; 1994 1995 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1996 if (IS_ERR(uobj)) 1997 return PTR_ERR(uobj); 1998 1999 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 2000 memset(&resp, 0, sizeof(resp)); 2001 resp.events_reported = obj->uevent.events_reported; 2002 2003 uobj_put_destroy(uobj); 2004 2005 return uverbs_response(attrs, &resp, sizeof(resp)); 2006 } 2007 2008 static void *alloc_wr(size_t wr_size, __u32 num_sge) 2009 { 2010 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) / 2011 sizeof(struct ib_sge)) 2012 return NULL; 2013 2014 return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) + 2015 num_sge * sizeof(struct ib_sge), 2016 GFP_KERNEL); 2017 } 2018 2019 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 2020 { 2021 struct ib_uverbs_post_send cmd; 2022 struct ib_uverbs_post_send_resp resp; 2023 struct ib_uverbs_send_wr *user_wr; 2024 struct ib_send_wr *wr = NULL, *last, *next; 2025 const struct ib_send_wr *bad_wr; 2026 struct ib_qp *qp; 2027 int i, sg_ind; 2028 int is_ud; 2029 int ret, ret2; 2030 size_t next_size; 2031 const struct ib_sge __user *sgls; 2032 const void __user *wqes; 2033 struct uverbs_req_iter iter; 2034 2035 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2036 if (ret) 2037 return ret; 2038 wqes = uverbs_request_next_ptr(&iter, size_mul(cmd.wqe_size, 2039 cmd.wr_count)); 2040 if (IS_ERR(wqes)) 2041 return PTR_ERR(wqes); 2042 sgls = uverbs_request_next_ptr(&iter, 2043 size_mul(cmd.sge_count, 2044 sizeof(struct ib_uverbs_sge))); 2045 if (IS_ERR(sgls)) 2046 return PTR_ERR(sgls); 2047 ret = uverbs_request_finish(&iter); 2048 if (ret) 2049 return ret; 2050 2051 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2052 if (!user_wr) 2053 return -ENOMEM; 2054 2055 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2056 if (IS_ERR(qp)) { 2057 ret = PTR_ERR(qp); 2058 goto out; 2059 } 2060 2061 is_ud = qp->qp_type == IB_QPT_UD; 2062 sg_ind = 0; 2063 last = NULL; 2064 for (i = 0; i < cmd.wr_count; ++i) { 2065 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2066 cmd.wqe_size)) { 2067 ret = -EFAULT; 2068 goto out_put; 2069 } 2070 2071 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2072 ret = -EINVAL; 2073 goto out_put; 2074 } 2075 2076 if (is_ud) { 2077 struct ib_ud_wr *ud; 2078 2079 if (user_wr->opcode != IB_WR_SEND && 2080 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2081 ret = -EINVAL; 2082 goto out_put; 2083 } 2084 2085 next_size = sizeof(*ud); 2086 ud = alloc_wr(next_size, user_wr->num_sge); 2087 if (!ud) { 2088 ret = -ENOMEM; 2089 goto out_put; 2090 } 2091 2092 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2093 user_wr->wr.ud.ah, attrs); 2094 if (IS_ERR(ud->ah)) { 2095 ret = PTR_ERR(ud->ah); 2096 kfree(ud); 2097 goto out_put; 2098 } 2099 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2100 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2101 2102 next = &ud->wr; 2103 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2104 user_wr->opcode == IB_WR_RDMA_WRITE || 2105 user_wr->opcode == IB_WR_RDMA_READ) { 2106 struct ib_rdma_wr *rdma; 2107 2108 next_size = sizeof(*rdma); 2109 rdma = alloc_wr(next_size, user_wr->num_sge); 2110 if (!rdma) { 2111 ret = -ENOMEM; 2112 goto out_put; 2113 } 2114 2115 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2116 rdma->rkey = user_wr->wr.rdma.rkey; 2117 2118 next = &rdma->wr; 2119 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2120 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2121 struct ib_atomic_wr *atomic; 2122 2123 next_size = sizeof(*atomic); 2124 atomic = alloc_wr(next_size, user_wr->num_sge); 2125 if (!atomic) { 2126 ret = -ENOMEM; 2127 goto out_put; 2128 } 2129 2130 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2131 atomic->compare_add = user_wr->wr.atomic.compare_add; 2132 atomic->swap = user_wr->wr.atomic.swap; 2133 atomic->rkey = user_wr->wr.atomic.rkey; 2134 2135 next = &atomic->wr; 2136 } else if (user_wr->opcode == IB_WR_SEND || 2137 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2138 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2139 next_size = sizeof(*next); 2140 next = alloc_wr(next_size, user_wr->num_sge); 2141 if (!next) { 2142 ret = -ENOMEM; 2143 goto out_put; 2144 } 2145 } else { 2146 ret = -EINVAL; 2147 goto out_put; 2148 } 2149 2150 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2151 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2152 next->ex.imm_data = 2153 (__be32 __force) user_wr->ex.imm_data; 2154 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2155 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2156 } 2157 2158 if (!last) 2159 wr = next; 2160 else 2161 last->next = next; 2162 last = next; 2163 2164 next->next = NULL; 2165 next->wr_id = user_wr->wr_id; 2166 next->num_sge = user_wr->num_sge; 2167 next->opcode = user_wr->opcode; 2168 next->send_flags = user_wr->send_flags; 2169 2170 if (next->num_sge) { 2171 next->sg_list = (void *) next + 2172 ALIGN(next_size, sizeof(struct ib_sge)); 2173 if (copy_from_user(next->sg_list, sgls + sg_ind, 2174 next->num_sge * 2175 sizeof(struct ib_sge))) { 2176 ret = -EFAULT; 2177 goto out_put; 2178 } 2179 sg_ind += next->num_sge; 2180 } else 2181 next->sg_list = NULL; 2182 } 2183 2184 resp.bad_wr = 0; 2185 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2186 if (ret) 2187 for (next = wr; next; next = next->next) { 2188 ++resp.bad_wr; 2189 if (next == bad_wr) 2190 break; 2191 } 2192 2193 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2194 if (ret2) 2195 ret = ret2; 2196 2197 out_put: 2198 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2199 UVERBS_LOOKUP_READ); 2200 2201 while (wr) { 2202 if (is_ud && ud_wr(wr)->ah) 2203 uobj_put_obj_read(ud_wr(wr)->ah); 2204 next = wr->next; 2205 kfree(wr); 2206 wr = next; 2207 } 2208 2209 out: 2210 kfree(user_wr); 2211 2212 return ret; 2213 } 2214 2215 static struct ib_recv_wr * 2216 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2217 u32 wqe_size, u32 sge_count) 2218 { 2219 struct ib_uverbs_recv_wr *user_wr; 2220 struct ib_recv_wr *wr = NULL, *last, *next; 2221 int sg_ind; 2222 int i; 2223 int ret; 2224 const struct ib_sge __user *sgls; 2225 const void __user *wqes; 2226 2227 if (wqe_size < sizeof(struct ib_uverbs_recv_wr)) 2228 return ERR_PTR(-EINVAL); 2229 2230 wqes = uverbs_request_next_ptr(iter, size_mul(wqe_size, wr_count)); 2231 if (IS_ERR(wqes)) 2232 return ERR_CAST(wqes); 2233 sgls = uverbs_request_next_ptr(iter, size_mul(sge_count, 2234 sizeof(struct ib_uverbs_sge))); 2235 if (IS_ERR(sgls)) 2236 return ERR_CAST(sgls); 2237 ret = uverbs_request_finish(iter); 2238 if (ret) 2239 return ERR_PTR(ret); 2240 2241 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2242 if (!user_wr) 2243 return ERR_PTR(-ENOMEM); 2244 2245 sg_ind = 0; 2246 last = NULL; 2247 for (i = 0; i < wr_count; ++i) { 2248 if (copy_from_user(user_wr, wqes + i * wqe_size, 2249 wqe_size)) { 2250 ret = -EFAULT; 2251 goto err; 2252 } 2253 2254 if (user_wr->num_sge + sg_ind > sge_count) { 2255 ret = -EINVAL; 2256 goto err; 2257 } 2258 2259 if (user_wr->num_sge >= 2260 (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) / 2261 sizeof(struct ib_sge)) { 2262 ret = -EINVAL; 2263 goto err; 2264 } 2265 2266 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) + 2267 user_wr->num_sge * sizeof(struct ib_sge), 2268 GFP_KERNEL); 2269 if (!next) { 2270 ret = -ENOMEM; 2271 goto err; 2272 } 2273 2274 if (!last) 2275 wr = next; 2276 else 2277 last->next = next; 2278 last = next; 2279 2280 next->next = NULL; 2281 next->wr_id = user_wr->wr_id; 2282 next->num_sge = user_wr->num_sge; 2283 2284 if (next->num_sge) { 2285 next->sg_list = (void *)next + 2286 ALIGN(sizeof(*next), sizeof(struct ib_sge)); 2287 if (copy_from_user(next->sg_list, sgls + sg_ind, 2288 next->num_sge * 2289 sizeof(struct ib_sge))) { 2290 ret = -EFAULT; 2291 goto err; 2292 } 2293 sg_ind += next->num_sge; 2294 } else 2295 next->sg_list = NULL; 2296 } 2297 2298 kfree(user_wr); 2299 return wr; 2300 2301 err: 2302 kfree(user_wr); 2303 2304 while (wr) { 2305 next = wr->next; 2306 kfree(wr); 2307 wr = next; 2308 } 2309 2310 return ERR_PTR(ret); 2311 } 2312 2313 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2314 { 2315 struct ib_uverbs_post_recv cmd; 2316 struct ib_uverbs_post_recv_resp resp; 2317 struct ib_recv_wr *wr, *next; 2318 const struct ib_recv_wr *bad_wr; 2319 struct ib_qp *qp; 2320 int ret, ret2; 2321 struct uverbs_req_iter iter; 2322 2323 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2324 if (ret) 2325 return ret; 2326 2327 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2328 cmd.sge_count); 2329 if (IS_ERR(wr)) 2330 return PTR_ERR(wr); 2331 2332 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2333 if (IS_ERR(qp)) { 2334 ret = PTR_ERR(qp); 2335 goto out; 2336 } 2337 2338 resp.bad_wr = 0; 2339 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2340 2341 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2342 UVERBS_LOOKUP_READ); 2343 if (ret) { 2344 for (next = wr; next; next = next->next) { 2345 ++resp.bad_wr; 2346 if (next == bad_wr) 2347 break; 2348 } 2349 } 2350 2351 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2352 if (ret2) 2353 ret = ret2; 2354 out: 2355 while (wr) { 2356 next = wr->next; 2357 kfree(wr); 2358 wr = next; 2359 } 2360 2361 return ret; 2362 } 2363 2364 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2365 { 2366 struct ib_uverbs_post_srq_recv cmd; 2367 struct ib_uverbs_post_srq_recv_resp resp; 2368 struct ib_recv_wr *wr, *next; 2369 const struct ib_recv_wr *bad_wr; 2370 struct ib_srq *srq; 2371 int ret, ret2; 2372 struct uverbs_req_iter iter; 2373 2374 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2375 if (ret) 2376 return ret; 2377 2378 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2379 cmd.sge_count); 2380 if (IS_ERR(wr)) 2381 return PTR_ERR(wr); 2382 2383 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2384 if (IS_ERR(srq)) { 2385 ret = PTR_ERR(srq); 2386 goto out; 2387 } 2388 2389 resp.bad_wr = 0; 2390 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2391 2392 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 2393 UVERBS_LOOKUP_READ); 2394 2395 if (ret) 2396 for (next = wr; next; next = next->next) { 2397 ++resp.bad_wr; 2398 if (next == bad_wr) 2399 break; 2400 } 2401 2402 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2403 if (ret2) 2404 ret = ret2; 2405 2406 out: 2407 while (wr) { 2408 next = wr->next; 2409 kfree(wr); 2410 wr = next; 2411 } 2412 2413 return ret; 2414 } 2415 2416 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2417 { 2418 struct ib_uverbs_create_ah cmd; 2419 struct ib_uverbs_create_ah_resp resp; 2420 struct ib_uobject *uobj; 2421 struct ib_pd *pd; 2422 struct ib_ah *ah; 2423 struct rdma_ah_attr attr = {}; 2424 int ret; 2425 struct ib_device *ib_dev; 2426 2427 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2428 if (ret) 2429 return ret; 2430 2431 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2432 if (IS_ERR(uobj)) 2433 return PTR_ERR(uobj); 2434 2435 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2436 ret = -EINVAL; 2437 goto err; 2438 } 2439 2440 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2441 if (IS_ERR(pd)) { 2442 ret = PTR_ERR(pd); 2443 goto err; 2444 } 2445 2446 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2447 rdma_ah_set_make_grd(&attr, false); 2448 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2449 rdma_ah_set_sl(&attr, cmd.attr.sl); 2450 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2451 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2452 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2453 2454 if (cmd.attr.is_global) { 2455 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2456 cmd.attr.grh.sgid_index, 2457 cmd.attr.grh.hop_limit, 2458 cmd.attr.grh.traffic_class); 2459 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2460 } else { 2461 rdma_ah_set_ah_flags(&attr, 0); 2462 } 2463 2464 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2465 if (IS_ERR(ah)) { 2466 ret = PTR_ERR(ah); 2467 goto err_put; 2468 } 2469 2470 ah->uobject = uobj; 2471 uobj->user_handle = cmd.user_handle; 2472 uobj->object = ah; 2473 uobj_put_obj_read(pd); 2474 uobj_finalize_uobj_create(uobj, attrs); 2475 2476 resp.ah_handle = uobj->id; 2477 return uverbs_response(attrs, &resp, sizeof(resp)); 2478 2479 err_put: 2480 uobj_put_obj_read(pd); 2481 err: 2482 uobj_alloc_abort(uobj, attrs); 2483 return ret; 2484 } 2485 2486 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2487 { 2488 struct ib_uverbs_destroy_ah cmd; 2489 int ret; 2490 2491 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2492 if (ret) 2493 return ret; 2494 2495 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2496 } 2497 2498 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2499 { 2500 struct ib_uverbs_attach_mcast cmd; 2501 struct ib_qp *qp; 2502 struct ib_uqp_object *obj; 2503 struct ib_uverbs_mcast_entry *mcast; 2504 int ret; 2505 2506 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2507 if (ret) 2508 return ret; 2509 2510 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2511 if (IS_ERR(qp)) 2512 return PTR_ERR(qp); 2513 2514 obj = qp->uobject; 2515 2516 mutex_lock(&obj->mcast_lock); 2517 list_for_each_entry(mcast, &obj->mcast_list, list) 2518 if (cmd.mlid == mcast->lid && 2519 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2520 ret = 0; 2521 goto out_put; 2522 } 2523 2524 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2525 if (!mcast) { 2526 ret = -ENOMEM; 2527 goto out_put; 2528 } 2529 2530 mcast->lid = cmd.mlid; 2531 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2532 2533 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2534 if (!ret) 2535 list_add_tail(&mcast->list, &obj->mcast_list); 2536 else 2537 kfree(mcast); 2538 2539 out_put: 2540 mutex_unlock(&obj->mcast_lock); 2541 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2542 UVERBS_LOOKUP_READ); 2543 2544 return ret; 2545 } 2546 2547 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2548 { 2549 struct ib_uverbs_detach_mcast cmd; 2550 struct ib_uqp_object *obj; 2551 struct ib_qp *qp; 2552 struct ib_uverbs_mcast_entry *mcast; 2553 int ret; 2554 bool found = false; 2555 2556 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2557 if (ret) 2558 return ret; 2559 2560 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2561 if (IS_ERR(qp)) 2562 return PTR_ERR(qp); 2563 2564 obj = qp->uobject; 2565 mutex_lock(&obj->mcast_lock); 2566 2567 list_for_each_entry(mcast, &obj->mcast_list, list) 2568 if (cmd.mlid == mcast->lid && 2569 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2570 list_del(&mcast->list); 2571 kfree(mcast); 2572 found = true; 2573 break; 2574 } 2575 2576 if (!found) { 2577 ret = -EINVAL; 2578 goto out_put; 2579 } 2580 2581 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2582 2583 out_put: 2584 mutex_unlock(&obj->mcast_lock); 2585 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2586 UVERBS_LOOKUP_READ); 2587 return ret; 2588 } 2589 2590 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2591 { 2592 struct ib_uflow_resources *resources; 2593 2594 resources = kzalloc(sizeof(*resources), GFP_KERNEL); 2595 2596 if (!resources) 2597 return NULL; 2598 2599 if (!num_specs) 2600 goto out; 2601 2602 resources->counters = 2603 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); 2604 resources->collection = 2605 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); 2606 2607 if (!resources->counters || !resources->collection) 2608 goto err; 2609 2610 out: 2611 resources->max = num_specs; 2612 return resources; 2613 2614 err: 2615 kfree(resources->counters); 2616 kfree(resources); 2617 2618 return NULL; 2619 } 2620 EXPORT_SYMBOL(flow_resources_alloc); 2621 2622 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2623 { 2624 unsigned int i; 2625 2626 if (!uflow_res) 2627 return; 2628 2629 for (i = 0; i < uflow_res->collection_num; i++) 2630 atomic_dec(&uflow_res->collection[i]->usecnt); 2631 2632 for (i = 0; i < uflow_res->counters_num; i++) 2633 atomic_dec(&uflow_res->counters[i]->usecnt); 2634 2635 kfree(uflow_res->collection); 2636 kfree(uflow_res->counters); 2637 kfree(uflow_res); 2638 } 2639 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2640 2641 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2642 enum ib_flow_spec_type type, 2643 void *ibobj) 2644 { 2645 WARN_ON(uflow_res->num >= uflow_res->max); 2646 2647 switch (type) { 2648 case IB_FLOW_SPEC_ACTION_HANDLE: 2649 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2650 uflow_res->collection[uflow_res->collection_num++] = 2651 (struct ib_flow_action *)ibobj; 2652 break; 2653 case IB_FLOW_SPEC_ACTION_COUNT: 2654 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2655 uflow_res->counters[uflow_res->counters_num++] = 2656 (struct ib_counters *)ibobj; 2657 break; 2658 default: 2659 WARN_ON(1); 2660 } 2661 2662 uflow_res->num++; 2663 } 2664 EXPORT_SYMBOL(flow_resources_add); 2665 2666 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2667 struct ib_uverbs_flow_spec *kern_spec, 2668 union ib_flow_spec *ib_spec, 2669 struct ib_uflow_resources *uflow_res) 2670 { 2671 ib_spec->type = kern_spec->type; 2672 switch (ib_spec->type) { 2673 case IB_FLOW_SPEC_ACTION_TAG: 2674 if (kern_spec->flow_tag.size != 2675 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2676 return -EINVAL; 2677 2678 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2679 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2680 break; 2681 case IB_FLOW_SPEC_ACTION_DROP: 2682 if (kern_spec->drop.size != 2683 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2684 return -EINVAL; 2685 2686 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2687 break; 2688 case IB_FLOW_SPEC_ACTION_HANDLE: 2689 if (kern_spec->action.size != 2690 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2691 return -EOPNOTSUPP; 2692 ib_spec->action.act = uobj_get_obj_read(flow_action, 2693 UVERBS_OBJECT_FLOW_ACTION, 2694 kern_spec->action.handle, 2695 attrs); 2696 if (IS_ERR(ib_spec->action.act)) 2697 return PTR_ERR(ib_spec->action.act); 2698 ib_spec->action.size = 2699 sizeof(struct ib_flow_spec_action_handle); 2700 flow_resources_add(uflow_res, 2701 IB_FLOW_SPEC_ACTION_HANDLE, 2702 ib_spec->action.act); 2703 uobj_put_obj_read(ib_spec->action.act); 2704 break; 2705 case IB_FLOW_SPEC_ACTION_COUNT: 2706 if (kern_spec->flow_count.size != 2707 sizeof(struct ib_uverbs_flow_spec_action_count)) 2708 return -EINVAL; 2709 ib_spec->flow_count.counters = 2710 uobj_get_obj_read(counters, 2711 UVERBS_OBJECT_COUNTERS, 2712 kern_spec->flow_count.handle, 2713 attrs); 2714 if (IS_ERR(ib_spec->flow_count.counters)) 2715 return PTR_ERR(ib_spec->flow_count.counters); 2716 ib_spec->flow_count.size = 2717 sizeof(struct ib_flow_spec_action_count); 2718 flow_resources_add(uflow_res, 2719 IB_FLOW_SPEC_ACTION_COUNT, 2720 ib_spec->flow_count.counters); 2721 uobj_put_obj_read(ib_spec->flow_count.counters); 2722 break; 2723 default: 2724 return -EINVAL; 2725 } 2726 return 0; 2727 } 2728 2729 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2730 u16 ib_real_filter_sz) 2731 { 2732 /* 2733 * User space filter structures must be 64 bit aligned, otherwise this 2734 * may pass, but we won't handle additional new attributes. 2735 */ 2736 2737 if (kern_filter_size > ib_real_filter_sz) { 2738 if (memchr_inv(kern_spec_filter + 2739 ib_real_filter_sz, 0, 2740 kern_filter_size - ib_real_filter_sz)) 2741 return -EINVAL; 2742 return ib_real_filter_sz; 2743 } 2744 return kern_filter_size; 2745 } 2746 2747 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2748 const void *kern_spec_mask, 2749 const void *kern_spec_val, 2750 size_t kern_filter_sz, 2751 union ib_flow_spec *ib_spec) 2752 { 2753 ssize_t actual_filter_sz; 2754 ssize_t ib_filter_sz; 2755 2756 /* User flow spec size must be aligned to 4 bytes */ 2757 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2758 return -EINVAL; 2759 2760 ib_spec->type = type; 2761 2762 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2763 return -EINVAL; 2764 2765 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2766 case IB_FLOW_SPEC_ETH: 2767 ib_filter_sz = sizeof(struct ib_flow_eth_filter); 2768 actual_filter_sz = spec_filter_size(kern_spec_mask, 2769 kern_filter_sz, 2770 ib_filter_sz); 2771 if (actual_filter_sz <= 0) 2772 return -EINVAL; 2773 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2774 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2775 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2776 break; 2777 case IB_FLOW_SPEC_IPV4: 2778 ib_filter_sz = sizeof(struct ib_flow_ipv4_filter); 2779 actual_filter_sz = spec_filter_size(kern_spec_mask, 2780 kern_filter_sz, 2781 ib_filter_sz); 2782 if (actual_filter_sz <= 0) 2783 return -EINVAL; 2784 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2785 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2786 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2787 break; 2788 case IB_FLOW_SPEC_IPV6: 2789 ib_filter_sz = sizeof(struct ib_flow_ipv6_filter); 2790 actual_filter_sz = spec_filter_size(kern_spec_mask, 2791 kern_filter_sz, 2792 ib_filter_sz); 2793 if (actual_filter_sz <= 0) 2794 return -EINVAL; 2795 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2796 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2797 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2798 2799 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2800 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2801 return -EINVAL; 2802 break; 2803 case IB_FLOW_SPEC_TCP: 2804 case IB_FLOW_SPEC_UDP: 2805 ib_filter_sz = sizeof(struct ib_flow_tcp_udp_filter); 2806 actual_filter_sz = spec_filter_size(kern_spec_mask, 2807 kern_filter_sz, 2808 ib_filter_sz); 2809 if (actual_filter_sz <= 0) 2810 return -EINVAL; 2811 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2812 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2813 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2814 break; 2815 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2816 ib_filter_sz = sizeof(struct ib_flow_tunnel_filter); 2817 actual_filter_sz = spec_filter_size(kern_spec_mask, 2818 kern_filter_sz, 2819 ib_filter_sz); 2820 if (actual_filter_sz <= 0) 2821 return -EINVAL; 2822 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2823 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2824 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2825 2826 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2827 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2828 return -EINVAL; 2829 break; 2830 case IB_FLOW_SPEC_ESP: 2831 ib_filter_sz = sizeof(struct ib_flow_esp_filter); 2832 actual_filter_sz = spec_filter_size(kern_spec_mask, 2833 kern_filter_sz, 2834 ib_filter_sz); 2835 if (actual_filter_sz <= 0) 2836 return -EINVAL; 2837 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2838 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2839 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2840 break; 2841 case IB_FLOW_SPEC_GRE: 2842 ib_filter_sz = sizeof(struct ib_flow_gre_filter); 2843 actual_filter_sz = spec_filter_size(kern_spec_mask, 2844 kern_filter_sz, 2845 ib_filter_sz); 2846 if (actual_filter_sz <= 0) 2847 return -EINVAL; 2848 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2849 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2850 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2851 break; 2852 case IB_FLOW_SPEC_MPLS: 2853 ib_filter_sz = sizeof(struct ib_flow_mpls_filter); 2854 actual_filter_sz = spec_filter_size(kern_spec_mask, 2855 kern_filter_sz, 2856 ib_filter_sz); 2857 if (actual_filter_sz <= 0) 2858 return -EINVAL; 2859 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2860 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2861 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2862 break; 2863 default: 2864 return -EINVAL; 2865 } 2866 return 0; 2867 } 2868 2869 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2870 union ib_flow_spec *ib_spec) 2871 { 2872 size_t kern_filter_sz; 2873 void *kern_spec_mask; 2874 void *kern_spec_val; 2875 2876 if (check_sub_overflow((size_t)kern_spec->hdr.size, 2877 sizeof(struct ib_uverbs_flow_spec_hdr), 2878 &kern_filter_sz)) 2879 return -EINVAL; 2880 2881 kern_filter_sz /= 2; 2882 2883 kern_spec_val = (void *)kern_spec + 2884 sizeof(struct ib_uverbs_flow_spec_hdr); 2885 kern_spec_mask = kern_spec_val + kern_filter_sz; 2886 2887 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2888 kern_spec_mask, 2889 kern_spec_val, 2890 kern_filter_sz, ib_spec); 2891 } 2892 2893 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2894 struct ib_uverbs_flow_spec *kern_spec, 2895 union ib_flow_spec *ib_spec, 2896 struct ib_uflow_resources *uflow_res) 2897 { 2898 if (kern_spec->reserved) 2899 return -EINVAL; 2900 2901 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2902 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2903 uflow_res); 2904 else 2905 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2906 } 2907 2908 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2909 { 2910 struct ib_uverbs_ex_create_wq cmd; 2911 struct ib_uverbs_ex_create_wq_resp resp = {}; 2912 struct ib_uwq_object *obj; 2913 int err = 0; 2914 struct ib_cq *cq; 2915 struct ib_pd *pd; 2916 struct ib_wq *wq; 2917 struct ib_wq_init_attr wq_init_attr = {}; 2918 struct ib_device *ib_dev; 2919 2920 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2921 if (err) 2922 return err; 2923 2924 if (cmd.comp_mask) 2925 return -EOPNOTSUPP; 2926 2927 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2928 &ib_dev); 2929 if (IS_ERR(obj)) 2930 return PTR_ERR(obj); 2931 2932 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2933 if (IS_ERR(pd)) { 2934 err = PTR_ERR(pd); 2935 goto err_uobj; 2936 } 2937 2938 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2939 if (IS_ERR(cq)) { 2940 err = PTR_ERR(cq); 2941 goto err_put_pd; 2942 } 2943 2944 wq_init_attr.cq = cq; 2945 wq_init_attr.max_sge = cmd.max_sge; 2946 wq_init_attr.max_wr = cmd.max_wr; 2947 wq_init_attr.wq_type = cmd.wq_type; 2948 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2949 wq_init_attr.create_flags = cmd.create_flags; 2950 INIT_LIST_HEAD(&obj->uevent.event_list); 2951 obj->uevent.uobject.user_handle = cmd.user_handle; 2952 2953 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2954 if (IS_ERR(wq)) { 2955 err = PTR_ERR(wq); 2956 goto err_put_cq; 2957 } 2958 2959 wq->uobject = obj; 2960 obj->uevent.uobject.object = wq; 2961 wq->wq_type = wq_init_attr.wq_type; 2962 wq->cq = cq; 2963 wq->pd = pd; 2964 wq->device = pd->device; 2965 atomic_set(&wq->usecnt, 0); 2966 atomic_inc(&pd->usecnt); 2967 atomic_inc(&cq->usecnt); 2968 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 2969 if (obj->uevent.event_file) 2970 uverbs_uobject_get(&obj->uevent.event_file->uobj); 2971 2972 uobj_put_obj_read(pd); 2973 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2974 UVERBS_LOOKUP_READ); 2975 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 2976 2977 resp.wq_handle = obj->uevent.uobject.id; 2978 resp.max_sge = wq_init_attr.max_sge; 2979 resp.max_wr = wq_init_attr.max_wr; 2980 resp.wqn = wq->wq_num; 2981 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2982 return uverbs_response(attrs, &resp, sizeof(resp)); 2983 2984 err_put_cq: 2985 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2986 UVERBS_LOOKUP_READ); 2987 err_put_pd: 2988 uobj_put_obj_read(pd); 2989 err_uobj: 2990 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2991 2992 return err; 2993 } 2994 2995 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2996 { 2997 struct ib_uverbs_ex_destroy_wq cmd; 2998 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 2999 struct ib_uobject *uobj; 3000 struct ib_uwq_object *obj; 3001 int ret; 3002 3003 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3004 if (ret) 3005 return ret; 3006 3007 if (cmd.comp_mask) 3008 return -EOPNOTSUPP; 3009 3010 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3011 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3012 if (IS_ERR(uobj)) 3013 return PTR_ERR(uobj); 3014 3015 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 3016 resp.events_reported = obj->uevent.events_reported; 3017 3018 uobj_put_destroy(uobj); 3019 3020 return uverbs_response(attrs, &resp, sizeof(resp)); 3021 } 3022 3023 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 3024 { 3025 struct ib_uverbs_ex_modify_wq cmd; 3026 struct ib_wq *wq; 3027 struct ib_wq_attr wq_attr = {}; 3028 int ret; 3029 3030 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3031 if (ret) 3032 return ret; 3033 3034 if (!cmd.attr_mask) 3035 return -EINVAL; 3036 3037 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3038 return -EINVAL; 3039 3040 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3041 if (IS_ERR(wq)) 3042 return PTR_ERR(wq); 3043 3044 if (cmd.attr_mask & IB_WQ_FLAGS) { 3045 wq_attr.flags = cmd.flags; 3046 wq_attr.flags_mask = cmd.flags_mask; 3047 } 3048 3049 if (cmd.attr_mask & IB_WQ_CUR_STATE) { 3050 if (cmd.curr_wq_state > IB_WQS_ERR) 3051 return -EINVAL; 3052 3053 wq_attr.curr_wq_state = cmd.curr_wq_state; 3054 } else { 3055 wq_attr.curr_wq_state = wq->state; 3056 } 3057 3058 if (cmd.attr_mask & IB_WQ_STATE) { 3059 if (cmd.wq_state > IB_WQS_ERR) 3060 return -EINVAL; 3061 3062 wq_attr.wq_state = cmd.wq_state; 3063 } else { 3064 wq_attr.wq_state = wq_attr.curr_wq_state; 3065 } 3066 3067 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3068 &attrs->driver_udata); 3069 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, 3070 UVERBS_LOOKUP_READ); 3071 return ret; 3072 } 3073 3074 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3075 { 3076 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3077 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3078 struct ib_uobject *uobj; 3079 int err; 3080 struct ib_rwq_ind_table_init_attr init_attr = {}; 3081 struct ib_rwq_ind_table *rwq_ind_tbl; 3082 struct ib_wq **wqs = NULL; 3083 u32 *wqs_handles = NULL; 3084 struct ib_wq *wq = NULL; 3085 int i, num_read_wqs; 3086 u32 num_wq_handles; 3087 struct uverbs_req_iter iter; 3088 struct ib_device *ib_dev; 3089 3090 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3091 if (err) 3092 return err; 3093 3094 if (cmd.comp_mask) 3095 return -EOPNOTSUPP; 3096 3097 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3098 return -EINVAL; 3099 3100 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3101 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3102 GFP_KERNEL); 3103 if (!wqs_handles) 3104 return -ENOMEM; 3105 3106 err = uverbs_request_next(&iter, wqs_handles, 3107 num_wq_handles * sizeof(__u32)); 3108 if (err) 3109 goto err_free; 3110 3111 err = uverbs_request_finish(&iter); 3112 if (err) 3113 goto err_free; 3114 3115 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); 3116 if (!wqs) { 3117 err = -ENOMEM; 3118 goto err_free; 3119 } 3120 3121 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3122 num_read_wqs++) { 3123 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3124 wqs_handles[num_read_wqs], attrs); 3125 if (IS_ERR(wq)) { 3126 err = PTR_ERR(wq); 3127 goto put_wqs; 3128 } 3129 3130 wqs[num_read_wqs] = wq; 3131 atomic_inc(&wqs[num_read_wqs]->usecnt); 3132 } 3133 3134 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3135 if (IS_ERR(uobj)) { 3136 err = PTR_ERR(uobj); 3137 goto put_wqs; 3138 } 3139 3140 rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table); 3141 if (!rwq_ind_tbl) { 3142 err = -ENOMEM; 3143 goto err_uobj; 3144 } 3145 3146 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3147 init_attr.ind_tbl = wqs; 3148 3149 rwq_ind_tbl->ind_tbl = wqs; 3150 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3151 rwq_ind_tbl->uobject = uobj; 3152 uobj->object = rwq_ind_tbl; 3153 rwq_ind_tbl->device = ib_dev; 3154 atomic_set(&rwq_ind_tbl->usecnt, 0); 3155 3156 err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr, 3157 &attrs->driver_udata); 3158 if (err) 3159 goto err_create; 3160 3161 for (i = 0; i < num_wq_handles; i++) 3162 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3163 UVERBS_LOOKUP_READ); 3164 kfree(wqs_handles); 3165 uobj_finalize_uobj_create(uobj, attrs); 3166 3167 resp.ind_tbl_handle = uobj->id; 3168 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3169 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3170 return uverbs_response(attrs, &resp, sizeof(resp)); 3171 3172 err_create: 3173 kfree(rwq_ind_tbl); 3174 err_uobj: 3175 uobj_alloc_abort(uobj, attrs); 3176 put_wqs: 3177 for (i = 0; i < num_read_wqs; i++) { 3178 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, 3179 UVERBS_LOOKUP_READ); 3180 atomic_dec(&wqs[i]->usecnt); 3181 } 3182 err_free: 3183 kfree(wqs_handles); 3184 kfree(wqs); 3185 return err; 3186 } 3187 3188 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3189 { 3190 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3191 int ret; 3192 3193 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3194 if (ret) 3195 return ret; 3196 3197 if (cmd.comp_mask) 3198 return -EOPNOTSUPP; 3199 3200 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3201 cmd.ind_tbl_handle, attrs); 3202 } 3203 3204 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3205 { 3206 struct ib_uverbs_create_flow cmd; 3207 struct ib_uverbs_create_flow_resp resp = {}; 3208 struct ib_uobject *uobj; 3209 struct ib_flow *flow_id; 3210 struct ib_uverbs_flow_attr *kern_flow_attr; 3211 struct ib_flow_attr *flow_attr; 3212 struct ib_qp *qp; 3213 struct ib_uflow_resources *uflow_res; 3214 struct ib_uverbs_flow_spec_hdr *kern_spec; 3215 struct uverbs_req_iter iter; 3216 int err; 3217 void *ib_spec; 3218 int i; 3219 struct ib_device *ib_dev; 3220 3221 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3222 if (err) 3223 return err; 3224 3225 if (cmd.comp_mask) 3226 return -EINVAL; 3227 3228 if (!capable(CAP_NET_RAW)) 3229 return -EPERM; 3230 3231 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3232 return -EINVAL; 3233 3234 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3235 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3236 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3237 return -EINVAL; 3238 3239 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3240 return -EINVAL; 3241 3242 if (cmd.flow_attr.size > 3243 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3244 return -EINVAL; 3245 3246 if (cmd.flow_attr.reserved[0] || 3247 cmd.flow_attr.reserved[1]) 3248 return -EINVAL; 3249 3250 if (cmd.flow_attr.num_of_specs) { 3251 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3252 GFP_KERNEL); 3253 if (!kern_flow_attr) 3254 return -ENOMEM; 3255 3256 *kern_flow_attr = cmd.flow_attr; 3257 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3258 cmd.flow_attr.size); 3259 if (err) 3260 goto err_free_attr; 3261 } else { 3262 kern_flow_attr = &cmd.flow_attr; 3263 } 3264 3265 err = uverbs_request_finish(&iter); 3266 if (err) 3267 goto err_free_attr; 3268 3269 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3270 if (IS_ERR(uobj)) { 3271 err = PTR_ERR(uobj); 3272 goto err_free_attr; 3273 } 3274 3275 if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) { 3276 err = -EINVAL; 3277 goto err_uobj; 3278 } 3279 3280 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3281 if (IS_ERR(qp)) { 3282 err = PTR_ERR(qp); 3283 goto err_uobj; 3284 } 3285 3286 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3287 err = -EINVAL; 3288 goto err_put; 3289 } 3290 3291 flow_attr = kzalloc(struct_size(flow_attr, flows, 3292 cmd.flow_attr.num_of_specs), GFP_KERNEL); 3293 if (!flow_attr) { 3294 err = -ENOMEM; 3295 goto err_put; 3296 } 3297 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3298 if (!uflow_res) { 3299 err = -ENOMEM; 3300 goto err_free_flow_attr; 3301 } 3302 3303 flow_attr->type = kern_flow_attr->type; 3304 flow_attr->priority = kern_flow_attr->priority; 3305 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3306 flow_attr->port = kern_flow_attr->port; 3307 flow_attr->flags = kern_flow_attr->flags; 3308 flow_attr->size = sizeof(*flow_attr); 3309 3310 kern_spec = kern_flow_attr->flow_specs; 3311 ib_spec = flow_attr + 1; 3312 for (i = 0; i < flow_attr->num_of_specs && 3313 cmd.flow_attr.size >= sizeof(*kern_spec) && 3314 cmd.flow_attr.size >= kern_spec->size; 3315 i++) { 3316 err = kern_spec_to_ib_spec( 3317 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3318 ib_spec, uflow_res); 3319 if (err) 3320 goto err_free; 3321 3322 flow_attr->size += 3323 ((union ib_flow_spec *) ib_spec)->size; 3324 cmd.flow_attr.size -= kern_spec->size; 3325 kern_spec = ((void *)kern_spec) + kern_spec->size; 3326 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3327 } 3328 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3329 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n", 3330 i, cmd.flow_attr.size); 3331 err = -EINVAL; 3332 goto err_free; 3333 } 3334 3335 flow_id = qp->device->ops.create_flow(qp, flow_attr, 3336 &attrs->driver_udata); 3337 3338 if (IS_ERR(flow_id)) { 3339 err = PTR_ERR(flow_id); 3340 goto err_free; 3341 } 3342 3343 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3344 3345 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3346 UVERBS_LOOKUP_READ); 3347 kfree(flow_attr); 3348 3349 if (cmd.flow_attr.num_of_specs) 3350 kfree(kern_flow_attr); 3351 uobj_finalize_uobj_create(uobj, attrs); 3352 3353 resp.flow_handle = uobj->id; 3354 return uverbs_response(attrs, &resp, sizeof(resp)); 3355 3356 err_free: 3357 ib_uverbs_flow_resources_free(uflow_res); 3358 err_free_flow_attr: 3359 kfree(flow_attr); 3360 err_put: 3361 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3362 UVERBS_LOOKUP_READ); 3363 err_uobj: 3364 uobj_alloc_abort(uobj, attrs); 3365 err_free_attr: 3366 if (cmd.flow_attr.num_of_specs) 3367 kfree(kern_flow_attr); 3368 return err; 3369 } 3370 3371 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3372 { 3373 struct ib_uverbs_destroy_flow cmd; 3374 int ret; 3375 3376 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3377 if (ret) 3378 return ret; 3379 3380 if (cmd.comp_mask) 3381 return -EINVAL; 3382 3383 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3384 } 3385 3386 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3387 struct ib_uverbs_create_xsrq *cmd, 3388 struct ib_udata *udata) 3389 { 3390 struct ib_uverbs_create_srq_resp resp = {}; 3391 struct ib_usrq_object *obj; 3392 struct ib_pd *pd; 3393 struct ib_srq *srq; 3394 struct ib_srq_init_attr attr; 3395 int ret; 3396 struct ib_uobject *xrcd_uobj; 3397 struct ib_device *ib_dev; 3398 3399 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3400 &ib_dev); 3401 if (IS_ERR(obj)) 3402 return PTR_ERR(obj); 3403 3404 if (cmd->srq_type == IB_SRQT_TM) 3405 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3406 3407 if (cmd->srq_type == IB_SRQT_XRC) { 3408 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3409 attrs); 3410 if (IS_ERR(xrcd_uobj)) { 3411 ret = -EINVAL; 3412 goto err; 3413 } 3414 3415 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3416 if (!attr.ext.xrc.xrcd) { 3417 ret = -EINVAL; 3418 goto err_put_xrcd; 3419 } 3420 3421 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3422 atomic_inc(&obj->uxrcd->refcnt); 3423 } 3424 3425 if (ib_srq_has_cq(cmd->srq_type)) { 3426 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3427 cmd->cq_handle, attrs); 3428 if (IS_ERR(attr.ext.cq)) { 3429 ret = PTR_ERR(attr.ext.cq); 3430 goto err_put_xrcd; 3431 } 3432 } 3433 3434 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3435 if (IS_ERR(pd)) { 3436 ret = PTR_ERR(pd); 3437 goto err_put_cq; 3438 } 3439 3440 attr.event_handler = ib_uverbs_srq_event_handler; 3441 attr.srq_type = cmd->srq_type; 3442 attr.attr.max_wr = cmd->max_wr; 3443 attr.attr.max_sge = cmd->max_sge; 3444 attr.attr.srq_limit = cmd->srq_limit; 3445 3446 INIT_LIST_HEAD(&obj->uevent.event_list); 3447 obj->uevent.uobject.user_handle = cmd->user_handle; 3448 3449 srq = ib_create_srq_user(pd, &attr, obj, udata); 3450 if (IS_ERR(srq)) { 3451 ret = PTR_ERR(srq); 3452 goto err_put_pd; 3453 } 3454 3455 obj->uevent.uobject.object = srq; 3456 obj->uevent.uobject.user_handle = cmd->user_handle; 3457 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); 3458 if (obj->uevent.event_file) 3459 uverbs_uobject_get(&obj->uevent.event_file->uobj); 3460 3461 if (cmd->srq_type == IB_SRQT_XRC) 3462 resp.srqn = srq->ext.xrc.srq_num; 3463 3464 if (cmd->srq_type == IB_SRQT_XRC) 3465 uobj_put_read(xrcd_uobj); 3466 3467 if (ib_srq_has_cq(cmd->srq_type)) 3468 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3469 UVERBS_LOOKUP_READ); 3470 3471 uobj_put_obj_read(pd); 3472 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); 3473 3474 resp.srq_handle = obj->uevent.uobject.id; 3475 resp.max_wr = attr.attr.max_wr; 3476 resp.max_sge = attr.attr.max_sge; 3477 return uverbs_response(attrs, &resp, sizeof(resp)); 3478 3479 err_put_pd: 3480 uobj_put_obj_read(pd); 3481 err_put_cq: 3482 if (ib_srq_has_cq(cmd->srq_type)) 3483 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3484 UVERBS_LOOKUP_READ); 3485 3486 err_put_xrcd: 3487 if (cmd->srq_type == IB_SRQT_XRC) { 3488 atomic_dec(&obj->uxrcd->refcnt); 3489 uobj_put_read(xrcd_uobj); 3490 } 3491 3492 err: 3493 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3494 return ret; 3495 } 3496 3497 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3498 { 3499 struct ib_uverbs_create_srq cmd; 3500 struct ib_uverbs_create_xsrq xcmd; 3501 int ret; 3502 3503 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3504 if (ret) 3505 return ret; 3506 3507 memset(&xcmd, 0, sizeof(xcmd)); 3508 xcmd.response = cmd.response; 3509 xcmd.user_handle = cmd.user_handle; 3510 xcmd.srq_type = IB_SRQT_BASIC; 3511 xcmd.pd_handle = cmd.pd_handle; 3512 xcmd.max_wr = cmd.max_wr; 3513 xcmd.max_sge = cmd.max_sge; 3514 xcmd.srq_limit = cmd.srq_limit; 3515 3516 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3517 } 3518 3519 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3520 { 3521 struct ib_uverbs_create_xsrq cmd; 3522 int ret; 3523 3524 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3525 if (ret) 3526 return ret; 3527 3528 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3529 } 3530 3531 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3532 { 3533 struct ib_uverbs_modify_srq cmd; 3534 struct ib_srq *srq; 3535 struct ib_srq_attr attr; 3536 int ret; 3537 3538 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3539 if (ret) 3540 return ret; 3541 3542 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3543 if (IS_ERR(srq)) 3544 return PTR_ERR(srq); 3545 3546 attr.max_wr = cmd.max_wr; 3547 attr.srq_limit = cmd.srq_limit; 3548 3549 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3550 &attrs->driver_udata); 3551 3552 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3553 UVERBS_LOOKUP_READ); 3554 3555 return ret; 3556 } 3557 3558 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3559 { 3560 struct ib_uverbs_query_srq cmd; 3561 struct ib_uverbs_query_srq_resp resp; 3562 struct ib_srq_attr attr; 3563 struct ib_srq *srq; 3564 int ret; 3565 3566 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3567 if (ret) 3568 return ret; 3569 3570 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3571 if (IS_ERR(srq)) 3572 return PTR_ERR(srq); 3573 3574 ret = ib_query_srq(srq, &attr); 3575 3576 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3577 UVERBS_LOOKUP_READ); 3578 3579 if (ret) 3580 return ret; 3581 3582 memset(&resp, 0, sizeof resp); 3583 3584 resp.max_wr = attr.max_wr; 3585 resp.max_sge = attr.max_sge; 3586 resp.srq_limit = attr.srq_limit; 3587 3588 return uverbs_response(attrs, &resp, sizeof(resp)); 3589 } 3590 3591 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3592 { 3593 struct ib_uverbs_destroy_srq cmd; 3594 struct ib_uverbs_destroy_srq_resp resp; 3595 struct ib_uobject *uobj; 3596 struct ib_uevent_object *obj; 3597 int ret; 3598 3599 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3600 if (ret) 3601 return ret; 3602 3603 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3604 if (IS_ERR(uobj)) 3605 return PTR_ERR(uobj); 3606 3607 obj = container_of(uobj, struct ib_uevent_object, uobject); 3608 memset(&resp, 0, sizeof(resp)); 3609 resp.events_reported = obj->events_reported; 3610 3611 uobj_put_destroy(uobj); 3612 3613 return uverbs_response(attrs, &resp, sizeof(resp)); 3614 } 3615 3616 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3617 { 3618 struct ib_uverbs_ex_query_device_resp resp = {}; 3619 struct ib_uverbs_ex_query_device cmd; 3620 struct ib_device_attr attr = {0}; 3621 struct ib_ucontext *ucontext; 3622 struct ib_device *ib_dev; 3623 int err; 3624 3625 ucontext = ib_uverbs_get_ucontext(attrs); 3626 if (IS_ERR(ucontext)) 3627 return PTR_ERR(ucontext); 3628 ib_dev = ucontext->device; 3629 3630 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3631 if (err) 3632 return err; 3633 3634 if (cmd.comp_mask) 3635 return -EINVAL; 3636 3637 if (cmd.reserved) 3638 return -EINVAL; 3639 3640 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3641 if (err) 3642 return err; 3643 3644 copy_query_dev_fields(ucontext, &resp.base, &attr); 3645 3646 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3647 resp.odp_caps.per_transport_caps.rc_odp_caps = 3648 attr.odp_caps.per_transport_caps.rc_odp_caps; 3649 resp.odp_caps.per_transport_caps.uc_odp_caps = 3650 attr.odp_caps.per_transport_caps.uc_odp_caps; 3651 resp.odp_caps.per_transport_caps.ud_odp_caps = 3652 attr.odp_caps.per_transport_caps.ud_odp_caps; 3653 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3654 3655 resp.timestamp_mask = attr.timestamp_mask; 3656 resp.hca_core_clock = attr.hca_core_clock; 3657 resp.device_cap_flags_ex = attr.device_cap_flags; 3658 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3659 resp.rss_caps.max_rwq_indirection_tables = 3660 attr.rss_caps.max_rwq_indirection_tables; 3661 resp.rss_caps.max_rwq_indirection_table_size = 3662 attr.rss_caps.max_rwq_indirection_table_size; 3663 resp.max_wq_type_rq = attr.max_wq_type_rq; 3664 resp.raw_packet_caps = attr.raw_packet_caps; 3665 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3666 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3667 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3668 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3669 resp.tm_caps.flags = attr.tm_caps.flags; 3670 resp.cq_moderation_caps.max_cq_moderation_count = 3671 attr.cq_caps.max_cq_moderation_count; 3672 resp.cq_moderation_caps.max_cq_moderation_period = 3673 attr.cq_caps.max_cq_moderation_period; 3674 resp.max_dm_size = attr.max_dm_size; 3675 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3676 3677 return uverbs_response(attrs, &resp, sizeof(resp)); 3678 } 3679 3680 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3681 { 3682 struct ib_uverbs_ex_modify_cq cmd; 3683 struct ib_cq *cq; 3684 int ret; 3685 3686 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3687 if (ret) 3688 return ret; 3689 3690 if (!cmd.attr_mask || cmd.reserved) 3691 return -EINVAL; 3692 3693 if (cmd.attr_mask > IB_CQ_MODERATE) 3694 return -EOPNOTSUPP; 3695 3696 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3697 if (IS_ERR(cq)) 3698 return PTR_ERR(cq); 3699 3700 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3701 3702 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3703 UVERBS_LOOKUP_READ); 3704 return ret; 3705 } 3706 3707 /* 3708 * Describe the input structs for write(). Some write methods have an input 3709 * only struct, most have an input and output. If the struct has an output then 3710 * the 'response' u64 must be the first field in the request structure. 3711 * 3712 * If udata is present then both the request and response structs have a 3713 * trailing driver_data flex array. In this case the size of the base struct 3714 * cannot be changed. 3715 */ 3716 #define UAPI_DEF_WRITE_IO(req, resp) \ 3717 .write.has_resp = 1 + \ 3718 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3719 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \ 3720 sizeof(u64)), \ 3721 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3722 3723 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3724 3725 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3726 UAPI_DEF_WRITE_IO(req, resp), \ 3727 .write.has_udata = \ 3728 1 + \ 3729 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3730 sizeof(req)) + \ 3731 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3732 sizeof(resp)) 3733 3734 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3735 UAPI_DEF_WRITE_I(req), \ 3736 .write.has_udata = \ 3737 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3738 sizeof(req)) 3739 3740 /* 3741 * The _EX versions are for use with WRITE_EX and allow the last struct member 3742 * to be specified. Buffers that do not include that member will be rejected. 3743 */ 3744 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3745 .write.has_resp = 1, \ 3746 .write.req_size = offsetofend(req, req_last_member), \ 3747 .write.resp_size = offsetofend(resp, resp_last_member) 3748 3749 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3750 .write.req_size = offsetofend(req, req_last_member) 3751 3752 const struct uapi_definition uverbs_def_write_intf[] = { 3753 DECLARE_UVERBS_OBJECT( 3754 UVERBS_OBJECT_AH, 3755 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3756 ib_uverbs_create_ah, 3757 UAPI_DEF_WRITE_UDATA_IO( 3758 struct ib_uverbs_create_ah, 3759 struct ib_uverbs_create_ah_resp)), 3760 DECLARE_UVERBS_WRITE( 3761 IB_USER_VERBS_CMD_DESTROY_AH, 3762 ib_uverbs_destroy_ah, 3763 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)), 3764 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah), 3765 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)), 3766 3767 DECLARE_UVERBS_OBJECT( 3768 UVERBS_OBJECT_COMP_CHANNEL, 3769 DECLARE_UVERBS_WRITE( 3770 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3771 ib_uverbs_create_comp_channel, 3772 UAPI_DEF_WRITE_IO( 3773 struct ib_uverbs_create_comp_channel, 3774 struct ib_uverbs_create_comp_channel_resp))), 3775 3776 DECLARE_UVERBS_OBJECT( 3777 UVERBS_OBJECT_CQ, 3778 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3779 ib_uverbs_create_cq, 3780 UAPI_DEF_WRITE_UDATA_IO( 3781 struct ib_uverbs_create_cq, 3782 struct ib_uverbs_create_cq_resp), 3783 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3784 DECLARE_UVERBS_WRITE( 3785 IB_USER_VERBS_CMD_DESTROY_CQ, 3786 ib_uverbs_destroy_cq, 3787 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3788 struct ib_uverbs_destroy_cq_resp), 3789 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3790 DECLARE_UVERBS_WRITE( 3791 IB_USER_VERBS_CMD_POLL_CQ, 3792 ib_uverbs_poll_cq, 3793 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3794 struct ib_uverbs_poll_cq_resp), 3795 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3796 DECLARE_UVERBS_WRITE( 3797 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3798 ib_uverbs_req_notify_cq, 3799 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3800 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3801 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3802 ib_uverbs_resize_cq, 3803 UAPI_DEF_WRITE_UDATA_IO( 3804 struct ib_uverbs_resize_cq, 3805 struct ib_uverbs_resize_cq_resp), 3806 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3807 DECLARE_UVERBS_WRITE_EX( 3808 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3809 ib_uverbs_ex_create_cq, 3810 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3811 reserved, 3812 struct ib_uverbs_ex_create_cq_resp, 3813 response_length), 3814 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3815 DECLARE_UVERBS_WRITE_EX( 3816 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3817 ib_uverbs_ex_modify_cq, 3818 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3819 UAPI_DEF_METHOD_NEEDS_FN(modify_cq))), 3820 3821 DECLARE_UVERBS_OBJECT( 3822 UVERBS_OBJECT_DEVICE, 3823 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3824 ib_uverbs_get_context, 3825 UAPI_DEF_WRITE_UDATA_IO( 3826 struct ib_uverbs_get_context, 3827 struct ib_uverbs_get_context_resp)), 3828 DECLARE_UVERBS_WRITE( 3829 IB_USER_VERBS_CMD_QUERY_DEVICE, 3830 ib_uverbs_query_device, 3831 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3832 struct ib_uverbs_query_device_resp)), 3833 DECLARE_UVERBS_WRITE( 3834 IB_USER_VERBS_CMD_QUERY_PORT, 3835 ib_uverbs_query_port, 3836 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3837 struct ib_uverbs_query_port_resp), 3838 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3839 DECLARE_UVERBS_WRITE_EX( 3840 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3841 ib_uverbs_ex_query_device, 3842 UAPI_DEF_WRITE_IO_EX( 3843 struct ib_uverbs_ex_query_device, 3844 reserved, 3845 struct ib_uverbs_ex_query_device_resp, 3846 response_length), 3847 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3848 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3849 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3850 3851 DECLARE_UVERBS_OBJECT( 3852 UVERBS_OBJECT_FLOW, 3853 DECLARE_UVERBS_WRITE_EX( 3854 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3855 ib_uverbs_ex_create_flow, 3856 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3857 flow_attr, 3858 struct ib_uverbs_create_flow_resp, 3859 flow_handle), 3860 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3861 DECLARE_UVERBS_WRITE_EX( 3862 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3863 ib_uverbs_ex_destroy_flow, 3864 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3865 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3866 3867 DECLARE_UVERBS_OBJECT( 3868 UVERBS_OBJECT_MR, 3869 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3870 ib_uverbs_dereg_mr, 3871 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3872 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3873 DECLARE_UVERBS_WRITE( 3874 IB_USER_VERBS_CMD_REG_MR, 3875 ib_uverbs_reg_mr, 3876 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3877 struct ib_uverbs_reg_mr_resp), 3878 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3879 DECLARE_UVERBS_WRITE( 3880 IB_USER_VERBS_CMD_REREG_MR, 3881 ib_uverbs_rereg_mr, 3882 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3883 struct ib_uverbs_rereg_mr_resp), 3884 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3885 3886 DECLARE_UVERBS_OBJECT( 3887 UVERBS_OBJECT_MW, 3888 DECLARE_UVERBS_WRITE( 3889 IB_USER_VERBS_CMD_ALLOC_MW, 3890 ib_uverbs_alloc_mw, 3891 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3892 struct ib_uverbs_alloc_mw_resp), 3893 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3894 DECLARE_UVERBS_WRITE( 3895 IB_USER_VERBS_CMD_DEALLOC_MW, 3896 ib_uverbs_dealloc_mw, 3897 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3898 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3899 3900 DECLARE_UVERBS_OBJECT( 3901 UVERBS_OBJECT_PD, 3902 DECLARE_UVERBS_WRITE( 3903 IB_USER_VERBS_CMD_ALLOC_PD, 3904 ib_uverbs_alloc_pd, 3905 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3906 struct ib_uverbs_alloc_pd_resp), 3907 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3908 DECLARE_UVERBS_WRITE( 3909 IB_USER_VERBS_CMD_DEALLOC_PD, 3910 ib_uverbs_dealloc_pd, 3911 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3912 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3913 3914 DECLARE_UVERBS_OBJECT( 3915 UVERBS_OBJECT_QP, 3916 DECLARE_UVERBS_WRITE( 3917 IB_USER_VERBS_CMD_ATTACH_MCAST, 3918 ib_uverbs_attach_mcast, 3919 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3920 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3921 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3922 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3923 ib_uverbs_create_qp, 3924 UAPI_DEF_WRITE_UDATA_IO( 3925 struct ib_uverbs_create_qp, 3926 struct ib_uverbs_create_qp_resp), 3927 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3928 DECLARE_UVERBS_WRITE( 3929 IB_USER_VERBS_CMD_DESTROY_QP, 3930 ib_uverbs_destroy_qp, 3931 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3932 struct ib_uverbs_destroy_qp_resp), 3933 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3934 DECLARE_UVERBS_WRITE( 3935 IB_USER_VERBS_CMD_DETACH_MCAST, 3936 ib_uverbs_detach_mcast, 3937 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3938 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3939 DECLARE_UVERBS_WRITE( 3940 IB_USER_VERBS_CMD_MODIFY_QP, 3941 ib_uverbs_modify_qp, 3942 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3943 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3944 DECLARE_UVERBS_WRITE( 3945 IB_USER_VERBS_CMD_POST_RECV, 3946 ib_uverbs_post_recv, 3947 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3948 struct ib_uverbs_post_recv_resp), 3949 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3950 DECLARE_UVERBS_WRITE( 3951 IB_USER_VERBS_CMD_POST_SEND, 3952 ib_uverbs_post_send, 3953 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3954 struct ib_uverbs_post_send_resp), 3955 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3956 DECLARE_UVERBS_WRITE( 3957 IB_USER_VERBS_CMD_QUERY_QP, 3958 ib_uverbs_query_qp, 3959 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3960 struct ib_uverbs_query_qp_resp), 3961 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3962 DECLARE_UVERBS_WRITE_EX( 3963 IB_USER_VERBS_EX_CMD_CREATE_QP, 3964 ib_uverbs_ex_create_qp, 3965 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3966 comp_mask, 3967 struct ib_uverbs_ex_create_qp_resp, 3968 response_length), 3969 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3970 DECLARE_UVERBS_WRITE_EX( 3971 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3972 ib_uverbs_ex_modify_qp, 3973 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3974 base, 3975 struct ib_uverbs_ex_modify_qp_resp, 3976 response_length), 3977 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3978 3979 DECLARE_UVERBS_OBJECT( 3980 UVERBS_OBJECT_RWQ_IND_TBL, 3981 DECLARE_UVERBS_WRITE_EX( 3982 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3983 ib_uverbs_ex_create_rwq_ind_table, 3984 UAPI_DEF_WRITE_IO_EX( 3985 struct ib_uverbs_ex_create_rwq_ind_table, 3986 log_ind_tbl_size, 3987 struct ib_uverbs_ex_create_rwq_ind_table_resp, 3988 ind_tbl_num), 3989 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 3990 DECLARE_UVERBS_WRITE_EX( 3991 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 3992 ib_uverbs_ex_destroy_rwq_ind_table, 3993 UAPI_DEF_WRITE_I( 3994 struct ib_uverbs_ex_destroy_rwq_ind_table), 3995 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 3996 3997 DECLARE_UVERBS_OBJECT( 3998 UVERBS_OBJECT_WQ, 3999 DECLARE_UVERBS_WRITE_EX( 4000 IB_USER_VERBS_EX_CMD_CREATE_WQ, 4001 ib_uverbs_ex_create_wq, 4002 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 4003 max_sge, 4004 struct ib_uverbs_ex_create_wq_resp, 4005 wqn), 4006 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 4007 DECLARE_UVERBS_WRITE_EX( 4008 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 4009 ib_uverbs_ex_destroy_wq, 4010 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 4011 wq_handle, 4012 struct ib_uverbs_ex_destroy_wq_resp, 4013 reserved), 4014 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 4015 DECLARE_UVERBS_WRITE_EX( 4016 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 4017 ib_uverbs_ex_modify_wq, 4018 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 4019 curr_wq_state), 4020 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 4021 4022 DECLARE_UVERBS_OBJECT( 4023 UVERBS_OBJECT_SRQ, 4024 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 4025 ib_uverbs_create_srq, 4026 UAPI_DEF_WRITE_UDATA_IO( 4027 struct ib_uverbs_create_srq, 4028 struct ib_uverbs_create_srq_resp), 4029 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4030 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 4031 ib_uverbs_create_xsrq, 4032 UAPI_DEF_WRITE_UDATA_IO( 4033 struct ib_uverbs_create_xsrq, 4034 struct ib_uverbs_create_srq_resp), 4035 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4036 DECLARE_UVERBS_WRITE( 4037 IB_USER_VERBS_CMD_DESTROY_SRQ, 4038 ib_uverbs_destroy_srq, 4039 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4040 struct ib_uverbs_destroy_srq_resp), 4041 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4042 DECLARE_UVERBS_WRITE( 4043 IB_USER_VERBS_CMD_MODIFY_SRQ, 4044 ib_uverbs_modify_srq, 4045 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4046 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4047 DECLARE_UVERBS_WRITE( 4048 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4049 ib_uverbs_post_srq_recv, 4050 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4051 struct ib_uverbs_post_srq_recv_resp), 4052 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4053 DECLARE_UVERBS_WRITE( 4054 IB_USER_VERBS_CMD_QUERY_SRQ, 4055 ib_uverbs_query_srq, 4056 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4057 struct ib_uverbs_query_srq_resp), 4058 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4059 4060 DECLARE_UVERBS_OBJECT( 4061 UVERBS_OBJECT_XRCD, 4062 DECLARE_UVERBS_WRITE( 4063 IB_USER_VERBS_CMD_CLOSE_XRCD, 4064 ib_uverbs_close_xrcd, 4065 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)), 4066 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4067 ib_uverbs_open_qp, 4068 UAPI_DEF_WRITE_UDATA_IO( 4069 struct ib_uverbs_open_qp, 4070 struct ib_uverbs_create_qp_resp)), 4071 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4072 ib_uverbs_open_xrcd, 4073 UAPI_DEF_WRITE_UDATA_IO( 4074 struct ib_uverbs_open_xrcd, 4075 struct ib_uverbs_open_xrcd_resp)), 4076 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd), 4077 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)), 4078 4079 {}, 4080 }; 4081