1 /* 2 * Copyright (c) 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved. 4 * Copyright (c) 2005 PathScale, Inc. All rights reserved. 5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include <linux/file.h> 37 #include <linux/fs.h> 38 #include <linux/slab.h> 39 #include <linux/sched.h> 40 41 #include <linux/uaccess.h> 42 43 #include <rdma/uverbs_types.h> 44 #include <rdma/uverbs_std_types.h> 45 #include "rdma_core.h" 46 47 #include "uverbs.h" 48 #include "core_priv.h" 49 50 /* 51 * Copy a response to userspace. If the provided 'resp' is larger than the 52 * user buffer it is silently truncated. If the user provided a larger buffer 53 * then the trailing portion is zero filled. 54 * 55 * These semantics are intended to support future extension of the output 56 * structures. 57 */ 58 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp, 59 size_t resp_len) 60 { 61 int ret; 62 63 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 64 return uverbs_copy_to_struct_or_zero( 65 attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len); 66 67 if (copy_to_user(attrs->ucore.outbuf, resp, 68 min(attrs->ucore.outlen, resp_len))) 69 return -EFAULT; 70 71 if (resp_len < attrs->ucore.outlen) { 72 /* 73 * Zero fill any extra memory that user 74 * space might have provided. 75 */ 76 ret = clear_user(attrs->ucore.outbuf + resp_len, 77 attrs->ucore.outlen - resp_len); 78 if (ret) 79 return -EFAULT; 80 } 81 82 return 0; 83 } 84 85 /* 86 * Copy a request from userspace. If the provided 'req' is larger than the 87 * user buffer then the user buffer is zero extended into the 'req'. If 'req' 88 * is smaller than the user buffer then the uncopied bytes in the user buffer 89 * must be zero. 90 */ 91 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req, 92 size_t req_len) 93 { 94 if (copy_from_user(req, attrs->ucore.inbuf, 95 min(attrs->ucore.inlen, req_len))) 96 return -EFAULT; 97 98 if (attrs->ucore.inlen < req_len) { 99 memset(req + attrs->ucore.inlen, 0, 100 req_len - attrs->ucore.inlen); 101 } else if (attrs->ucore.inlen > req_len) { 102 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len, 103 attrs->ucore.inlen - req_len)) 104 return -EOPNOTSUPP; 105 } 106 return 0; 107 } 108 109 /* 110 * Generate the value for the 'response_length' protocol used by write_ex. 111 * This is the number of bytes the kernel actually wrote. Userspace can use 112 * this to detect what structure members in the response the kernel 113 * understood. 114 */ 115 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs, 116 size_t resp_len) 117 { 118 return min_t(size_t, attrs->ucore.outlen, resp_len); 119 } 120 121 /* 122 * The iterator version of the request interface is for handlers that need to 123 * step over a flex array at the end of a command header. 124 */ 125 struct uverbs_req_iter { 126 const void __user *cur; 127 const void __user *end; 128 }; 129 130 static int uverbs_request_start(struct uverbs_attr_bundle *attrs, 131 struct uverbs_req_iter *iter, 132 void *req, 133 size_t req_len) 134 { 135 if (attrs->ucore.inlen < req_len) 136 return -ENOSPC; 137 138 if (copy_from_user(req, attrs->ucore.inbuf, req_len)) 139 return -EFAULT; 140 141 iter->cur = attrs->ucore.inbuf + req_len; 142 iter->end = attrs->ucore.inbuf + attrs->ucore.inlen; 143 return 0; 144 } 145 146 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val, 147 size_t len) 148 { 149 if (iter->cur + len > iter->end) 150 return -ENOSPC; 151 152 if (copy_from_user(val, iter->cur, len)) 153 return -EFAULT; 154 155 iter->cur += len; 156 return 0; 157 } 158 159 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter, 160 size_t len) 161 { 162 const void __user *res = iter->cur; 163 164 if (iter->cur + len > iter->end) 165 return (void __force __user *)ERR_PTR(-ENOSPC); 166 iter->cur += len; 167 return res; 168 } 169 170 static int uverbs_request_finish(struct uverbs_req_iter *iter) 171 { 172 if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur)) 173 return -EOPNOTSUPP; 174 return 0; 175 } 176 177 /* 178 * When calling a destroy function during an error unwind we need to pass in 179 * the udata that is sanitized of all user arguments. Ie from the driver 180 * perspective it looks like no udata was passed. 181 */ 182 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs) 183 { 184 attrs->driver_udata = (struct ib_udata){}; 185 return &attrs->driver_udata; 186 } 187 188 static struct ib_uverbs_completion_event_file * 189 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs) 190 { 191 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL, 192 fd, attrs); 193 194 if (IS_ERR(uobj)) 195 return (void *)uobj; 196 197 uverbs_uobject_get(uobj); 198 uobj_put_read(uobj); 199 200 return container_of(uobj, struct ib_uverbs_completion_event_file, 201 uobj); 202 } 203 #define ib_uverbs_lookup_comp_file(_fd, _ufile) \ 204 _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile) 205 206 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs) 207 { 208 struct ib_uverbs_file *file = attrs->ufile; 209 struct ib_uverbs_get_context cmd; 210 struct ib_uverbs_get_context_resp resp; 211 struct ib_ucontext *ucontext; 212 struct file *filp; 213 struct ib_rdmacg_object cg_obj; 214 struct ib_device *ib_dev; 215 int ret; 216 217 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 218 if (ret) 219 return ret; 220 221 mutex_lock(&file->ucontext_lock); 222 ib_dev = srcu_dereference(file->device->ib_dev, 223 &file->device->disassociate_srcu); 224 if (!ib_dev) { 225 ret = -EIO; 226 goto err; 227 } 228 229 if (file->ucontext) { 230 ret = -EINVAL; 231 goto err; 232 } 233 234 ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE); 235 if (ret) 236 goto err; 237 238 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext); 239 if (!ucontext) { 240 ret = -ENOMEM; 241 goto err_alloc; 242 } 243 244 attrs->context = ucontext; 245 246 ucontext->res.type = RDMA_RESTRACK_CTX; 247 ucontext->device = ib_dev; 248 ucontext->cg_obj = cg_obj; 249 /* ufile is required when some objects are released */ 250 ucontext->ufile = file; 251 252 ucontext->closing = false; 253 ucontext->cleanup_retryable = false; 254 255 mutex_init(&ucontext->per_mm_list_lock); 256 INIT_LIST_HEAD(&ucontext->per_mm_list); 257 258 ret = get_unused_fd_flags(O_CLOEXEC); 259 if (ret < 0) 260 goto err_free; 261 resp.async_fd = ret; 262 263 filp = ib_uverbs_alloc_async_event_file(file, ib_dev); 264 if (IS_ERR(filp)) { 265 ret = PTR_ERR(filp); 266 goto err_fd; 267 } 268 269 resp.num_comp_vectors = file->device->num_comp_vectors; 270 271 ret = uverbs_response(attrs, &resp, sizeof(resp)); 272 if (ret) 273 goto err_file; 274 275 ret = ib_dev->ops.alloc_ucontext(ucontext, &attrs->driver_udata); 276 if (ret) 277 goto err_file; 278 if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING)) 279 ucontext->invalidate_range = NULL; 280 281 rdma_restrack_uadd(&ucontext->res); 282 283 fd_install(resp.async_fd, filp); 284 285 /* 286 * Make sure that ib_uverbs_get_ucontext() sees the pointer update 287 * only after all writes to setup the ucontext have completed 288 */ 289 smp_store_release(&file->ucontext, ucontext); 290 291 mutex_unlock(&file->ucontext_lock); 292 293 return 0; 294 295 err_file: 296 ib_uverbs_free_async_event_file(file); 297 fput(filp); 298 299 err_fd: 300 put_unused_fd(resp.async_fd); 301 302 err_free: 303 kfree(ucontext); 304 305 err_alloc: 306 ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE); 307 308 err: 309 mutex_unlock(&file->ucontext_lock); 310 return ret; 311 } 312 313 static void copy_query_dev_fields(struct ib_ucontext *ucontext, 314 struct ib_uverbs_query_device_resp *resp, 315 struct ib_device_attr *attr) 316 { 317 struct ib_device *ib_dev = ucontext->device; 318 319 resp->fw_ver = attr->fw_ver; 320 resp->node_guid = ib_dev->node_guid; 321 resp->sys_image_guid = attr->sys_image_guid; 322 resp->max_mr_size = attr->max_mr_size; 323 resp->page_size_cap = attr->page_size_cap; 324 resp->vendor_id = attr->vendor_id; 325 resp->vendor_part_id = attr->vendor_part_id; 326 resp->hw_ver = attr->hw_ver; 327 resp->max_qp = attr->max_qp; 328 resp->max_qp_wr = attr->max_qp_wr; 329 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags); 330 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge); 331 resp->max_sge_rd = attr->max_sge_rd; 332 resp->max_cq = attr->max_cq; 333 resp->max_cqe = attr->max_cqe; 334 resp->max_mr = attr->max_mr; 335 resp->max_pd = attr->max_pd; 336 resp->max_qp_rd_atom = attr->max_qp_rd_atom; 337 resp->max_ee_rd_atom = attr->max_ee_rd_atom; 338 resp->max_res_rd_atom = attr->max_res_rd_atom; 339 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; 340 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; 341 resp->atomic_cap = attr->atomic_cap; 342 resp->max_ee = attr->max_ee; 343 resp->max_rdd = attr->max_rdd; 344 resp->max_mw = attr->max_mw; 345 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; 346 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; 347 resp->max_mcast_grp = attr->max_mcast_grp; 348 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; 349 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; 350 resp->max_ah = attr->max_ah; 351 resp->max_fmr = attr->max_fmr; 352 resp->max_map_per_fmr = attr->max_map_per_fmr; 353 resp->max_srq = attr->max_srq; 354 resp->max_srq_wr = attr->max_srq_wr; 355 resp->max_srq_sge = attr->max_srq_sge; 356 resp->max_pkeys = attr->max_pkeys; 357 resp->local_ca_ack_delay = attr->local_ca_ack_delay; 358 resp->phys_port_cnt = ib_dev->phys_port_cnt; 359 } 360 361 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs) 362 { 363 struct ib_uverbs_query_device cmd; 364 struct ib_uverbs_query_device_resp resp; 365 struct ib_ucontext *ucontext; 366 int ret; 367 368 ucontext = ib_uverbs_get_ucontext(attrs); 369 if (IS_ERR(ucontext)) 370 return PTR_ERR(ucontext); 371 372 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 373 if (ret) 374 return ret; 375 376 memset(&resp, 0, sizeof resp); 377 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs); 378 379 return uverbs_response(attrs, &resp, sizeof(resp)); 380 } 381 382 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs) 383 { 384 struct ib_uverbs_query_port cmd; 385 struct ib_uverbs_query_port_resp resp; 386 struct ib_port_attr attr; 387 int ret; 388 struct ib_ucontext *ucontext; 389 struct ib_device *ib_dev; 390 391 ucontext = ib_uverbs_get_ucontext(attrs); 392 if (IS_ERR(ucontext)) 393 return PTR_ERR(ucontext); 394 ib_dev = ucontext->device; 395 396 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 397 if (ret) 398 return ret; 399 400 ret = ib_query_port(ib_dev, cmd.port_num, &attr); 401 if (ret) 402 return ret; 403 404 memset(&resp, 0, sizeof resp); 405 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num); 406 407 return uverbs_response(attrs, &resp, sizeof(resp)); 408 } 409 410 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs) 411 { 412 struct ib_uverbs_alloc_pd cmd; 413 struct ib_uverbs_alloc_pd_resp resp; 414 struct ib_uobject *uobj; 415 struct ib_pd *pd; 416 int ret; 417 struct ib_device *ib_dev; 418 419 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 420 if (ret) 421 return ret; 422 423 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev); 424 if (IS_ERR(uobj)) 425 return PTR_ERR(uobj); 426 427 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd); 428 if (!pd) { 429 ret = -ENOMEM; 430 goto err; 431 } 432 433 pd->device = ib_dev; 434 pd->uobject = uobj; 435 pd->__internal_mr = NULL; 436 atomic_set(&pd->usecnt, 0); 437 pd->res.type = RDMA_RESTRACK_PD; 438 439 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata); 440 if (ret) 441 goto err_alloc; 442 443 uobj->object = pd; 444 memset(&resp, 0, sizeof resp); 445 resp.pd_handle = uobj->id; 446 rdma_restrack_uadd(&pd->res); 447 448 ret = uverbs_response(attrs, &resp, sizeof(resp)); 449 if (ret) 450 goto err_copy; 451 452 return uobj_alloc_commit(uobj, attrs); 453 454 err_copy: 455 ib_dealloc_pd_user(pd, uverbs_get_cleared_udata(attrs)); 456 pd = NULL; 457 err_alloc: 458 kfree(pd); 459 err: 460 uobj_alloc_abort(uobj, attrs); 461 return ret; 462 } 463 464 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs) 465 { 466 struct ib_uverbs_dealloc_pd cmd; 467 int ret; 468 469 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 470 if (ret) 471 return ret; 472 473 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 474 } 475 476 struct xrcd_table_entry { 477 struct rb_node node; 478 struct ib_xrcd *xrcd; 479 struct inode *inode; 480 }; 481 482 static int xrcd_table_insert(struct ib_uverbs_device *dev, 483 struct inode *inode, 484 struct ib_xrcd *xrcd) 485 { 486 struct xrcd_table_entry *entry, *scan; 487 struct rb_node **p = &dev->xrcd_tree.rb_node; 488 struct rb_node *parent = NULL; 489 490 entry = kmalloc(sizeof *entry, GFP_KERNEL); 491 if (!entry) 492 return -ENOMEM; 493 494 entry->xrcd = xrcd; 495 entry->inode = inode; 496 497 while (*p) { 498 parent = *p; 499 scan = rb_entry(parent, struct xrcd_table_entry, node); 500 501 if (inode < scan->inode) { 502 p = &(*p)->rb_left; 503 } else if (inode > scan->inode) { 504 p = &(*p)->rb_right; 505 } else { 506 kfree(entry); 507 return -EEXIST; 508 } 509 } 510 511 rb_link_node(&entry->node, parent, p); 512 rb_insert_color(&entry->node, &dev->xrcd_tree); 513 igrab(inode); 514 return 0; 515 } 516 517 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, 518 struct inode *inode) 519 { 520 struct xrcd_table_entry *entry; 521 struct rb_node *p = dev->xrcd_tree.rb_node; 522 523 while (p) { 524 entry = rb_entry(p, struct xrcd_table_entry, node); 525 526 if (inode < entry->inode) 527 p = p->rb_left; 528 else if (inode > entry->inode) 529 p = p->rb_right; 530 else 531 return entry; 532 } 533 534 return NULL; 535 } 536 537 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) 538 { 539 struct xrcd_table_entry *entry; 540 541 entry = xrcd_table_search(dev, inode); 542 if (!entry) 543 return NULL; 544 545 return entry->xrcd; 546 } 547 548 static void xrcd_table_delete(struct ib_uverbs_device *dev, 549 struct inode *inode) 550 { 551 struct xrcd_table_entry *entry; 552 553 entry = xrcd_table_search(dev, inode); 554 if (entry) { 555 iput(inode); 556 rb_erase(&entry->node, &dev->xrcd_tree); 557 kfree(entry); 558 } 559 } 560 561 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs) 562 { 563 struct ib_uverbs_device *ibudev = attrs->ufile->device; 564 struct ib_uverbs_open_xrcd cmd; 565 struct ib_uverbs_open_xrcd_resp resp; 566 struct ib_uxrcd_object *obj; 567 struct ib_xrcd *xrcd = NULL; 568 struct fd f = {NULL, 0}; 569 struct inode *inode = NULL; 570 int ret = 0; 571 int new_xrcd = 0; 572 struct ib_device *ib_dev; 573 574 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 575 if (ret) 576 return ret; 577 578 mutex_lock(&ibudev->xrcd_tree_mutex); 579 580 if (cmd.fd != -1) { 581 /* search for file descriptor */ 582 f = fdget(cmd.fd); 583 if (!f.file) { 584 ret = -EBADF; 585 goto err_tree_mutex_unlock; 586 } 587 588 inode = file_inode(f.file); 589 xrcd = find_xrcd(ibudev, inode); 590 if (!xrcd && !(cmd.oflags & O_CREAT)) { 591 /* no file descriptor. Need CREATE flag */ 592 ret = -EAGAIN; 593 goto err_tree_mutex_unlock; 594 } 595 596 if (xrcd && cmd.oflags & O_EXCL) { 597 ret = -EINVAL; 598 goto err_tree_mutex_unlock; 599 } 600 } 601 602 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs, 603 &ib_dev); 604 if (IS_ERR(obj)) { 605 ret = PTR_ERR(obj); 606 goto err_tree_mutex_unlock; 607 } 608 609 if (!xrcd) { 610 xrcd = ib_dev->ops.alloc_xrcd(ib_dev, &attrs->driver_udata); 611 if (IS_ERR(xrcd)) { 612 ret = PTR_ERR(xrcd); 613 goto err; 614 } 615 616 xrcd->inode = inode; 617 xrcd->device = ib_dev; 618 atomic_set(&xrcd->usecnt, 0); 619 mutex_init(&xrcd->tgt_qp_mutex); 620 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 621 new_xrcd = 1; 622 } 623 624 atomic_set(&obj->refcnt, 0); 625 obj->uobject.object = xrcd; 626 memset(&resp, 0, sizeof resp); 627 resp.xrcd_handle = obj->uobject.id; 628 629 if (inode) { 630 if (new_xrcd) { 631 /* create new inode/xrcd table entry */ 632 ret = xrcd_table_insert(ibudev, inode, xrcd); 633 if (ret) 634 goto err_dealloc_xrcd; 635 } 636 atomic_inc(&xrcd->usecnt); 637 } 638 639 ret = uverbs_response(attrs, &resp, sizeof(resp)); 640 if (ret) 641 goto err_copy; 642 643 if (f.file) 644 fdput(f); 645 646 mutex_unlock(&ibudev->xrcd_tree_mutex); 647 648 return uobj_alloc_commit(&obj->uobject, attrs); 649 650 err_copy: 651 if (inode) { 652 if (new_xrcd) 653 xrcd_table_delete(ibudev, inode); 654 atomic_dec(&xrcd->usecnt); 655 } 656 657 err_dealloc_xrcd: 658 ib_dealloc_xrcd(xrcd, uverbs_get_cleared_udata(attrs)); 659 660 err: 661 uobj_alloc_abort(&obj->uobject, attrs); 662 663 err_tree_mutex_unlock: 664 if (f.file) 665 fdput(f); 666 667 mutex_unlock(&ibudev->xrcd_tree_mutex); 668 669 return ret; 670 } 671 672 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) 673 { 674 struct ib_uverbs_close_xrcd cmd; 675 int ret; 676 677 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 678 if (ret) 679 return ret; 680 681 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); 682 } 683 684 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, 685 enum rdma_remove_reason why, 686 struct uverbs_attr_bundle *attrs) 687 { 688 struct inode *inode; 689 int ret; 690 struct ib_uverbs_device *dev = attrs->ufile->device; 691 692 inode = xrcd->inode; 693 if (inode && !atomic_dec_and_test(&xrcd->usecnt)) 694 return 0; 695 696 ret = ib_dealloc_xrcd(xrcd, &attrs->driver_udata); 697 698 if (ib_is_destroy_retryable(ret, why, uobject)) { 699 atomic_inc(&xrcd->usecnt); 700 return ret; 701 } 702 703 if (inode) 704 xrcd_table_delete(dev, inode); 705 706 return ret; 707 } 708 709 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) 710 { 711 struct ib_uverbs_reg_mr cmd; 712 struct ib_uverbs_reg_mr_resp resp; 713 struct ib_uobject *uobj; 714 struct ib_pd *pd; 715 struct ib_mr *mr; 716 int ret; 717 struct ib_device *ib_dev; 718 719 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 720 if (ret) 721 return ret; 722 723 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 724 return -EINVAL; 725 726 ret = ib_check_mr_access(cmd.access_flags); 727 if (ret) 728 return ret; 729 730 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 731 if (IS_ERR(uobj)) 732 return PTR_ERR(uobj); 733 734 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 735 if (!pd) { 736 ret = -EINVAL; 737 goto err_free; 738 } 739 740 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) { 741 if (!(pd->device->attrs.device_cap_flags & 742 IB_DEVICE_ON_DEMAND_PAGING)) { 743 pr_debug("ODP support not available\n"); 744 ret = -EINVAL; 745 goto err_put; 746 } 747 } 748 749 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 750 cmd.access_flags, 751 &attrs->driver_udata); 752 if (IS_ERR(mr)) { 753 ret = PTR_ERR(mr); 754 goto err_put; 755 } 756 757 mr->device = pd->device; 758 mr->pd = pd; 759 mr->type = IB_MR_TYPE_USER; 760 mr->dm = NULL; 761 mr->sig_attrs = NULL; 762 mr->uobject = uobj; 763 atomic_inc(&pd->usecnt); 764 mr->res.type = RDMA_RESTRACK_MR; 765 rdma_restrack_uadd(&mr->res); 766 767 uobj->object = mr; 768 769 memset(&resp, 0, sizeof resp); 770 resp.lkey = mr->lkey; 771 resp.rkey = mr->rkey; 772 resp.mr_handle = uobj->id; 773 774 ret = uverbs_response(attrs, &resp, sizeof(resp)); 775 if (ret) 776 goto err_copy; 777 778 uobj_put_obj_read(pd); 779 780 return uobj_alloc_commit(uobj, attrs); 781 782 err_copy: 783 ib_dereg_mr_user(mr, uverbs_get_cleared_udata(attrs)); 784 785 err_put: 786 uobj_put_obj_read(pd); 787 788 err_free: 789 uobj_alloc_abort(uobj, attrs); 790 return ret; 791 } 792 793 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 794 { 795 struct ib_uverbs_rereg_mr cmd; 796 struct ib_uverbs_rereg_mr_resp resp; 797 struct ib_pd *pd = NULL; 798 struct ib_mr *mr; 799 struct ib_pd *old_pd; 800 int ret; 801 struct ib_uobject *uobj; 802 803 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 804 if (ret) 805 return ret; 806 807 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) 808 return -EINVAL; 809 810 if ((cmd.flags & IB_MR_REREG_TRANS) && 811 (!cmd.start || !cmd.hca_va || 0 >= cmd.length || 812 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) 813 return -EINVAL; 814 815 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 816 if (IS_ERR(uobj)) 817 return PTR_ERR(uobj); 818 819 mr = uobj->object; 820 821 if (mr->dm) { 822 ret = -EINVAL; 823 goto put_uobjs; 824 } 825 826 if (cmd.flags & IB_MR_REREG_ACCESS) { 827 ret = ib_check_mr_access(cmd.access_flags); 828 if (ret) 829 goto put_uobjs; 830 } 831 832 if (cmd.flags & IB_MR_REREG_PD) { 833 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 834 attrs); 835 if (!pd) { 836 ret = -EINVAL; 837 goto put_uobjs; 838 } 839 } 840 841 old_pd = mr->pd; 842 ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start, 843 cmd.length, cmd.hca_va, 844 cmd.access_flags, pd, 845 &attrs->driver_udata); 846 if (ret) 847 goto put_uobj_pd; 848 849 if (cmd.flags & IB_MR_REREG_PD) { 850 atomic_inc(&pd->usecnt); 851 mr->pd = pd; 852 atomic_dec(&old_pd->usecnt); 853 } 854 855 memset(&resp, 0, sizeof(resp)); 856 resp.lkey = mr->lkey; 857 resp.rkey = mr->rkey; 858 859 ret = uverbs_response(attrs, &resp, sizeof(resp)); 860 861 put_uobj_pd: 862 if (cmd.flags & IB_MR_REREG_PD) 863 uobj_put_obj_read(pd); 864 865 put_uobjs: 866 uobj_put_write(uobj); 867 868 return ret; 869 } 870 871 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) 872 { 873 struct ib_uverbs_dereg_mr cmd; 874 int ret; 875 876 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 877 if (ret) 878 return ret; 879 880 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 881 } 882 883 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 884 { 885 struct ib_uverbs_alloc_mw cmd; 886 struct ib_uverbs_alloc_mw_resp resp; 887 struct ib_uobject *uobj; 888 struct ib_pd *pd; 889 struct ib_mw *mw; 890 int ret; 891 struct ib_device *ib_dev; 892 893 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 894 if (ret) 895 return ret; 896 897 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 898 if (IS_ERR(uobj)) 899 return PTR_ERR(uobj); 900 901 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 902 if (!pd) { 903 ret = -EINVAL; 904 goto err_free; 905 } 906 907 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 908 ret = -EINVAL; 909 goto err_put; 910 } 911 912 mw = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata); 913 if (IS_ERR(mw)) { 914 ret = PTR_ERR(mw); 915 goto err_put; 916 } 917 918 mw->device = pd->device; 919 mw->pd = pd; 920 mw->uobject = uobj; 921 atomic_inc(&pd->usecnt); 922 923 uobj->object = mw; 924 925 memset(&resp, 0, sizeof(resp)); 926 resp.rkey = mw->rkey; 927 resp.mw_handle = uobj->id; 928 929 ret = uverbs_response(attrs, &resp, sizeof(resp)); 930 if (ret) 931 goto err_copy; 932 933 uobj_put_obj_read(pd); 934 return uobj_alloc_commit(uobj, attrs); 935 936 err_copy: 937 uverbs_dealloc_mw(mw); 938 err_put: 939 uobj_put_obj_read(pd); 940 err_free: 941 uobj_alloc_abort(uobj, attrs); 942 return ret; 943 } 944 945 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) 946 { 947 struct ib_uverbs_dealloc_mw cmd; 948 int ret; 949 950 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 951 if (ret) 952 return ret; 953 954 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); 955 } 956 957 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) 958 { 959 struct ib_uverbs_create_comp_channel cmd; 960 struct ib_uverbs_create_comp_channel_resp resp; 961 struct ib_uobject *uobj; 962 struct ib_uverbs_completion_event_file *ev_file; 963 struct ib_device *ib_dev; 964 int ret; 965 966 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 967 if (ret) 968 return ret; 969 970 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); 971 if (IS_ERR(uobj)) 972 return PTR_ERR(uobj); 973 974 resp.fd = uobj->id; 975 976 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, 977 uobj); 978 ib_uverbs_init_event_queue(&ev_file->ev_queue); 979 980 ret = uverbs_response(attrs, &resp, sizeof(resp)); 981 if (ret) { 982 uobj_alloc_abort(uobj, attrs); 983 return ret; 984 } 985 986 return uobj_alloc_commit(uobj, attrs); 987 } 988 989 static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs, 990 struct ib_uverbs_ex_create_cq *cmd) 991 { 992 struct ib_ucq_object *obj; 993 struct ib_uverbs_completion_event_file *ev_file = NULL; 994 struct ib_cq *cq; 995 int ret; 996 struct ib_uverbs_ex_create_cq_resp resp; 997 struct ib_cq_init_attr attr = {}; 998 struct ib_device *ib_dev; 999 1000 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) 1001 return ERR_PTR(-EINVAL); 1002 1003 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, 1004 &ib_dev); 1005 if (IS_ERR(obj)) 1006 return obj; 1007 1008 if (cmd->comp_channel >= 0) { 1009 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); 1010 if (IS_ERR(ev_file)) { 1011 ret = PTR_ERR(ev_file); 1012 goto err; 1013 } 1014 } 1015 1016 obj->uobject.user_handle = cmd->user_handle; 1017 obj->comp_events_reported = 0; 1018 obj->async_events_reported = 0; 1019 INIT_LIST_HEAD(&obj->comp_list); 1020 INIT_LIST_HEAD(&obj->async_list); 1021 1022 attr.cqe = cmd->cqe; 1023 attr.comp_vector = cmd->comp_vector; 1024 attr.flags = cmd->flags; 1025 1026 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 1027 if (!cq) { 1028 ret = -ENOMEM; 1029 goto err_file; 1030 } 1031 cq->device = ib_dev; 1032 cq->uobject = &obj->uobject; 1033 cq->comp_handler = ib_uverbs_comp_handler; 1034 cq->event_handler = ib_uverbs_cq_event_handler; 1035 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 1036 atomic_set(&cq->usecnt, 0); 1037 1038 ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata); 1039 if (ret) 1040 goto err_free; 1041 1042 obj->uobject.object = cq; 1043 memset(&resp, 0, sizeof resp); 1044 resp.base.cq_handle = obj->uobject.id; 1045 resp.base.cqe = cq->cqe; 1046 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1047 1048 cq->res.type = RDMA_RESTRACK_CQ; 1049 rdma_restrack_uadd(&cq->res); 1050 1051 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1052 if (ret) 1053 goto err_cb; 1054 1055 ret = uobj_alloc_commit(&obj->uobject, attrs); 1056 if (ret) 1057 return ERR_PTR(ret); 1058 return obj; 1059 1060 err_cb: 1061 ib_destroy_cq_user(cq, uverbs_get_cleared_udata(attrs)); 1062 cq = NULL; 1063 err_free: 1064 kfree(cq); 1065 err_file: 1066 if (ev_file) 1067 ib_uverbs_release_ucq(attrs->ufile, ev_file, obj); 1068 1069 err: 1070 uobj_alloc_abort(&obj->uobject, attrs); 1071 1072 return ERR_PTR(ret); 1073 } 1074 1075 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) 1076 { 1077 struct ib_uverbs_create_cq cmd; 1078 struct ib_uverbs_ex_create_cq cmd_ex; 1079 struct ib_ucq_object *obj; 1080 int ret; 1081 1082 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1083 if (ret) 1084 return ret; 1085 1086 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1087 cmd_ex.user_handle = cmd.user_handle; 1088 cmd_ex.cqe = cmd.cqe; 1089 cmd_ex.comp_vector = cmd.comp_vector; 1090 cmd_ex.comp_channel = cmd.comp_channel; 1091 1092 obj = create_cq(attrs, &cmd_ex); 1093 return PTR_ERR_OR_ZERO(obj); 1094 } 1095 1096 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) 1097 { 1098 struct ib_uverbs_ex_create_cq cmd; 1099 struct ib_ucq_object *obj; 1100 int ret; 1101 1102 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1103 if (ret) 1104 return ret; 1105 1106 if (cmd.comp_mask) 1107 return -EINVAL; 1108 1109 if (cmd.reserved) 1110 return -EINVAL; 1111 1112 obj = create_cq(attrs, &cmd); 1113 return PTR_ERR_OR_ZERO(obj); 1114 } 1115 1116 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) 1117 { 1118 struct ib_uverbs_resize_cq cmd; 1119 struct ib_uverbs_resize_cq_resp resp = {}; 1120 struct ib_cq *cq; 1121 int ret = -EINVAL; 1122 1123 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1124 if (ret) 1125 return ret; 1126 1127 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1128 if (!cq) 1129 return -EINVAL; 1130 1131 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); 1132 if (ret) 1133 goto out; 1134 1135 resp.cqe = cq->cqe; 1136 1137 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1138 out: 1139 uobj_put_obj_read(cq); 1140 1141 return ret; 1142 } 1143 1144 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1145 struct ib_wc *wc) 1146 { 1147 struct ib_uverbs_wc tmp; 1148 1149 tmp.wr_id = wc->wr_id; 1150 tmp.status = wc->status; 1151 tmp.opcode = wc->opcode; 1152 tmp.vendor_err = wc->vendor_err; 1153 tmp.byte_len = wc->byte_len; 1154 tmp.ex.imm_data = wc->ex.imm_data; 1155 tmp.qp_num = wc->qp->qp_num; 1156 tmp.src_qp = wc->src_qp; 1157 tmp.wc_flags = wc->wc_flags; 1158 tmp.pkey_index = wc->pkey_index; 1159 if (rdma_cap_opa_ah(ib_dev, wc->port_num)) 1160 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); 1161 else 1162 tmp.slid = ib_lid_cpu16(wc->slid); 1163 tmp.sl = wc->sl; 1164 tmp.dlid_path_bits = wc->dlid_path_bits; 1165 tmp.port_num = wc->port_num; 1166 tmp.reserved = 0; 1167 1168 if (copy_to_user(dest, &tmp, sizeof tmp)) 1169 return -EFAULT; 1170 1171 return 0; 1172 } 1173 1174 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1175 { 1176 struct ib_uverbs_poll_cq cmd; 1177 struct ib_uverbs_poll_cq_resp resp; 1178 u8 __user *header_ptr; 1179 u8 __user *data_ptr; 1180 struct ib_cq *cq; 1181 struct ib_wc wc; 1182 int ret; 1183 1184 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1185 if (ret) 1186 return ret; 1187 1188 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1189 if (!cq) 1190 return -EINVAL; 1191 1192 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1193 header_ptr = attrs->ucore.outbuf; 1194 data_ptr = header_ptr + sizeof resp; 1195 1196 memset(&resp, 0, sizeof resp); 1197 while (resp.count < cmd.ne) { 1198 ret = ib_poll_cq(cq, 1, &wc); 1199 if (ret < 0) 1200 goto out_put; 1201 if (!ret) 1202 break; 1203 1204 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1205 if (ret) 1206 goto out_put; 1207 1208 data_ptr += sizeof(struct ib_uverbs_wc); 1209 ++resp.count; 1210 } 1211 1212 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1213 ret = -EFAULT; 1214 goto out_put; 1215 } 1216 ret = 0; 1217 1218 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1219 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1220 1221 out_put: 1222 uobj_put_obj_read(cq); 1223 return ret; 1224 } 1225 1226 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1227 { 1228 struct ib_uverbs_req_notify_cq cmd; 1229 struct ib_cq *cq; 1230 int ret; 1231 1232 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1233 if (ret) 1234 return ret; 1235 1236 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1237 if (!cq) 1238 return -EINVAL; 1239 1240 ib_req_notify_cq(cq, cmd.solicited_only ? 1241 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1242 1243 uobj_put_obj_read(cq); 1244 1245 return 0; 1246 } 1247 1248 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1249 { 1250 struct ib_uverbs_destroy_cq cmd; 1251 struct ib_uverbs_destroy_cq_resp resp; 1252 struct ib_uobject *uobj; 1253 struct ib_ucq_object *obj; 1254 int ret; 1255 1256 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1257 if (ret) 1258 return ret; 1259 1260 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1261 if (IS_ERR(uobj)) 1262 return PTR_ERR(uobj); 1263 1264 obj = container_of(uobj, struct ib_ucq_object, uobject); 1265 memset(&resp, 0, sizeof(resp)); 1266 resp.comp_events_reported = obj->comp_events_reported; 1267 resp.async_events_reported = obj->async_events_reported; 1268 1269 uobj_put_destroy(uobj); 1270 1271 return uverbs_response(attrs, &resp, sizeof(resp)); 1272 } 1273 1274 static int create_qp(struct uverbs_attr_bundle *attrs, 1275 struct ib_uverbs_ex_create_qp *cmd) 1276 { 1277 struct ib_uqp_object *obj; 1278 struct ib_device *device; 1279 struct ib_pd *pd = NULL; 1280 struct ib_xrcd *xrcd = NULL; 1281 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1282 struct ib_cq *scq = NULL, *rcq = NULL; 1283 struct ib_srq *srq = NULL; 1284 struct ib_qp *qp; 1285 struct ib_qp_init_attr attr = {}; 1286 struct ib_uverbs_ex_create_qp_resp resp; 1287 int ret; 1288 struct ib_rwq_ind_table *ind_tbl = NULL; 1289 bool has_sq = true; 1290 struct ib_device *ib_dev; 1291 1292 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW)) 1293 return -EPERM; 1294 1295 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1296 &ib_dev); 1297 if (IS_ERR(obj)) 1298 return PTR_ERR(obj); 1299 obj->uxrcd = NULL; 1300 obj->uevent.uobject.user_handle = cmd->user_handle; 1301 mutex_init(&obj->mcast_lock); 1302 1303 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1304 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1305 UVERBS_OBJECT_RWQ_IND_TBL, 1306 cmd->rwq_ind_tbl_handle, attrs); 1307 if (!ind_tbl) { 1308 ret = -EINVAL; 1309 goto err_put; 1310 } 1311 1312 attr.rwq_ind_tbl = ind_tbl; 1313 } 1314 1315 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1316 ret = -EINVAL; 1317 goto err_put; 1318 } 1319 1320 if (ind_tbl && !cmd->max_send_wr) 1321 has_sq = false; 1322 1323 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1324 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1325 attrs); 1326 1327 if (IS_ERR(xrcd_uobj)) { 1328 ret = -EINVAL; 1329 goto err_put; 1330 } 1331 1332 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1333 if (!xrcd) { 1334 ret = -EINVAL; 1335 goto err_put; 1336 } 1337 device = xrcd->device; 1338 } else { 1339 if (cmd->qp_type == IB_QPT_XRC_INI) { 1340 cmd->max_recv_wr = 0; 1341 cmd->max_recv_sge = 0; 1342 } else { 1343 if (cmd->is_srq) { 1344 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1345 cmd->srq_handle, attrs); 1346 if (!srq || srq->srq_type == IB_SRQT_XRC) { 1347 ret = -EINVAL; 1348 goto err_put; 1349 } 1350 } 1351 1352 if (!ind_tbl) { 1353 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1354 rcq = uobj_get_obj_read( 1355 cq, UVERBS_OBJECT_CQ, 1356 cmd->recv_cq_handle, attrs); 1357 if (!rcq) { 1358 ret = -EINVAL; 1359 goto err_put; 1360 } 1361 } 1362 } 1363 } 1364 1365 if (has_sq) 1366 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1367 cmd->send_cq_handle, attrs); 1368 if (!ind_tbl) 1369 rcq = rcq ?: scq; 1370 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1371 attrs); 1372 if (!pd || (!scq && has_sq)) { 1373 ret = -EINVAL; 1374 goto err_put; 1375 } 1376 1377 device = pd->device; 1378 } 1379 1380 attr.event_handler = ib_uverbs_qp_event_handler; 1381 attr.qp_context = attrs->ufile; 1382 attr.send_cq = scq; 1383 attr.recv_cq = rcq; 1384 attr.srq = srq; 1385 attr.xrcd = xrcd; 1386 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1387 IB_SIGNAL_REQ_WR; 1388 attr.qp_type = cmd->qp_type; 1389 attr.create_flags = 0; 1390 1391 attr.cap.max_send_wr = cmd->max_send_wr; 1392 attr.cap.max_recv_wr = cmd->max_recv_wr; 1393 attr.cap.max_send_sge = cmd->max_send_sge; 1394 attr.cap.max_recv_sge = cmd->max_recv_sge; 1395 attr.cap.max_inline_data = cmd->max_inline_data; 1396 1397 obj->uevent.events_reported = 0; 1398 INIT_LIST_HEAD(&obj->uevent.event_list); 1399 INIT_LIST_HEAD(&obj->mcast_list); 1400 1401 attr.create_flags = cmd->create_flags; 1402 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1403 IB_QP_CREATE_CROSS_CHANNEL | 1404 IB_QP_CREATE_MANAGED_SEND | 1405 IB_QP_CREATE_MANAGED_RECV | 1406 IB_QP_CREATE_SCATTER_FCS | 1407 IB_QP_CREATE_CVLAN_STRIPPING | 1408 IB_QP_CREATE_SOURCE_QPN | 1409 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1410 ret = -EINVAL; 1411 goto err_put; 1412 } 1413 1414 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1415 if (!capable(CAP_NET_RAW)) { 1416 ret = -EPERM; 1417 goto err_put; 1418 } 1419 1420 attr.source_qpn = cmd->source_qpn; 1421 } 1422 1423 if (cmd->qp_type == IB_QPT_XRC_TGT) 1424 qp = ib_create_qp(pd, &attr); 1425 else 1426 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata, 1427 &obj->uevent.uobject); 1428 1429 if (IS_ERR(qp)) { 1430 ret = PTR_ERR(qp); 1431 goto err_put; 1432 } 1433 1434 if (cmd->qp_type != IB_QPT_XRC_TGT) { 1435 ret = ib_create_qp_security(qp, device); 1436 if (ret) 1437 goto err_cb; 1438 1439 qp->pd = pd; 1440 qp->send_cq = attr.send_cq; 1441 qp->recv_cq = attr.recv_cq; 1442 qp->srq = attr.srq; 1443 qp->rwq_ind_tbl = ind_tbl; 1444 qp->event_handler = attr.event_handler; 1445 qp->qp_context = attr.qp_context; 1446 qp->qp_type = attr.qp_type; 1447 atomic_set(&qp->usecnt, 0); 1448 atomic_inc(&pd->usecnt); 1449 qp->port = 0; 1450 if (attr.send_cq) 1451 atomic_inc(&attr.send_cq->usecnt); 1452 if (attr.recv_cq) 1453 atomic_inc(&attr.recv_cq->usecnt); 1454 if (attr.srq) 1455 atomic_inc(&attr.srq->usecnt); 1456 if (ind_tbl) 1457 atomic_inc(&ind_tbl->usecnt); 1458 } else { 1459 /* It is done in _ib_create_qp for other QP types */ 1460 qp->uobject = &obj->uevent.uobject; 1461 } 1462 1463 obj->uevent.uobject.object = qp; 1464 1465 memset(&resp, 0, sizeof resp); 1466 resp.base.qpn = qp->qp_num; 1467 resp.base.qp_handle = obj->uevent.uobject.id; 1468 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1469 resp.base.max_send_sge = attr.cap.max_send_sge; 1470 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1471 resp.base.max_send_wr = attr.cap.max_send_wr; 1472 resp.base.max_inline_data = attr.cap.max_inline_data; 1473 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1474 1475 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1476 if (ret) 1477 goto err_cb; 1478 1479 if (xrcd) { 1480 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1481 uobject); 1482 atomic_inc(&obj->uxrcd->refcnt); 1483 uobj_put_read(xrcd_uobj); 1484 } 1485 1486 if (pd) 1487 uobj_put_obj_read(pd); 1488 if (scq) 1489 uobj_put_obj_read(scq); 1490 if (rcq && rcq != scq) 1491 uobj_put_obj_read(rcq); 1492 if (srq) 1493 uobj_put_obj_read(srq); 1494 if (ind_tbl) 1495 uobj_put_obj_read(ind_tbl); 1496 1497 return uobj_alloc_commit(&obj->uevent.uobject, attrs); 1498 err_cb: 1499 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs)); 1500 1501 err_put: 1502 if (!IS_ERR(xrcd_uobj)) 1503 uobj_put_read(xrcd_uobj); 1504 if (pd) 1505 uobj_put_obj_read(pd); 1506 if (scq) 1507 uobj_put_obj_read(scq); 1508 if (rcq && rcq != scq) 1509 uobj_put_obj_read(rcq); 1510 if (srq) 1511 uobj_put_obj_read(srq); 1512 if (ind_tbl) 1513 uobj_put_obj_read(ind_tbl); 1514 1515 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1516 return ret; 1517 } 1518 1519 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1520 { 1521 struct ib_uverbs_create_qp cmd; 1522 struct ib_uverbs_ex_create_qp cmd_ex; 1523 int ret; 1524 1525 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1526 if (ret) 1527 return ret; 1528 1529 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1530 cmd_ex.user_handle = cmd.user_handle; 1531 cmd_ex.pd_handle = cmd.pd_handle; 1532 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1533 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1534 cmd_ex.srq_handle = cmd.srq_handle; 1535 cmd_ex.max_send_wr = cmd.max_send_wr; 1536 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1537 cmd_ex.max_send_sge = cmd.max_send_sge; 1538 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1539 cmd_ex.max_inline_data = cmd.max_inline_data; 1540 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1541 cmd_ex.qp_type = cmd.qp_type; 1542 cmd_ex.is_srq = cmd.is_srq; 1543 1544 return create_qp(attrs, &cmd_ex); 1545 } 1546 1547 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1548 { 1549 struct ib_uverbs_ex_create_qp cmd; 1550 int ret; 1551 1552 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1553 if (ret) 1554 return ret; 1555 1556 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1557 return -EINVAL; 1558 1559 if (cmd.reserved) 1560 return -EINVAL; 1561 1562 return create_qp(attrs, &cmd); 1563 } 1564 1565 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1566 { 1567 struct ib_uverbs_open_qp cmd; 1568 struct ib_uverbs_create_qp_resp resp; 1569 struct ib_uqp_object *obj; 1570 struct ib_xrcd *xrcd; 1571 struct ib_uobject *uninitialized_var(xrcd_uobj); 1572 struct ib_qp *qp; 1573 struct ib_qp_open_attr attr; 1574 int ret; 1575 struct ib_device *ib_dev; 1576 1577 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1578 if (ret) 1579 return ret; 1580 1581 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1582 &ib_dev); 1583 if (IS_ERR(obj)) 1584 return PTR_ERR(obj); 1585 1586 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1587 if (IS_ERR(xrcd_uobj)) { 1588 ret = -EINVAL; 1589 goto err_put; 1590 } 1591 1592 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1593 if (!xrcd) { 1594 ret = -EINVAL; 1595 goto err_xrcd; 1596 } 1597 1598 attr.event_handler = ib_uverbs_qp_event_handler; 1599 attr.qp_context = attrs->ufile; 1600 attr.qp_num = cmd.qpn; 1601 attr.qp_type = cmd.qp_type; 1602 1603 obj->uevent.events_reported = 0; 1604 INIT_LIST_HEAD(&obj->uevent.event_list); 1605 INIT_LIST_HEAD(&obj->mcast_list); 1606 1607 qp = ib_open_qp(xrcd, &attr); 1608 if (IS_ERR(qp)) { 1609 ret = PTR_ERR(qp); 1610 goto err_xrcd; 1611 } 1612 1613 obj->uevent.uobject.object = qp; 1614 obj->uevent.uobject.user_handle = cmd.user_handle; 1615 1616 memset(&resp, 0, sizeof resp); 1617 resp.qpn = qp->qp_num; 1618 resp.qp_handle = obj->uevent.uobject.id; 1619 1620 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1621 if (ret) 1622 goto err_destroy; 1623 1624 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1625 atomic_inc(&obj->uxrcd->refcnt); 1626 qp->uobject = &obj->uevent.uobject; 1627 uobj_put_read(xrcd_uobj); 1628 1629 return uobj_alloc_commit(&obj->uevent.uobject, attrs); 1630 1631 err_destroy: 1632 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs)); 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 (!qp) { 1684 ret = -EINVAL; 1685 goto out; 1686 } 1687 1688 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1689 1690 uobj_put_obj_read(qp); 1691 1692 if (ret) 1693 goto out; 1694 1695 memset(&resp, 0, sizeof resp); 1696 1697 resp.qp_state = attr->qp_state; 1698 resp.cur_qp_state = attr->cur_qp_state; 1699 resp.path_mtu = attr->path_mtu; 1700 resp.path_mig_state = attr->path_mig_state; 1701 resp.qkey = attr->qkey; 1702 resp.rq_psn = attr->rq_psn; 1703 resp.sq_psn = attr->sq_psn; 1704 resp.dest_qp_num = attr->dest_qp_num; 1705 resp.qp_access_flags = attr->qp_access_flags; 1706 resp.pkey_index = attr->pkey_index; 1707 resp.alt_pkey_index = attr->alt_pkey_index; 1708 resp.sq_draining = attr->sq_draining; 1709 resp.max_rd_atomic = attr->max_rd_atomic; 1710 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1711 resp.min_rnr_timer = attr->min_rnr_timer; 1712 resp.port_num = attr->port_num; 1713 resp.timeout = attr->timeout; 1714 resp.retry_cnt = attr->retry_cnt; 1715 resp.rnr_retry = attr->rnr_retry; 1716 resp.alt_port_num = attr->alt_port_num; 1717 resp.alt_timeout = attr->alt_timeout; 1718 1719 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1720 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1721 1722 resp.max_send_wr = init_attr->cap.max_send_wr; 1723 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1724 resp.max_send_sge = init_attr->cap.max_send_sge; 1725 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1726 resp.max_inline_data = init_attr->cap.max_inline_data; 1727 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1728 1729 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1730 1731 out: 1732 kfree(attr); 1733 kfree(init_attr); 1734 1735 return ret; 1736 } 1737 1738 /* Remove ignored fields set in the attribute mask */ 1739 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1740 { 1741 switch (qp_type) { 1742 case IB_QPT_XRC_INI: 1743 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1744 case IB_QPT_XRC_TGT: 1745 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1746 IB_QP_RNR_RETRY); 1747 default: 1748 return mask; 1749 } 1750 } 1751 1752 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1753 struct rdma_ah_attr *rdma_attr, 1754 struct ib_uverbs_qp_dest *uverb_attr) 1755 { 1756 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); 1757 if (uverb_attr->is_global) { 1758 rdma_ah_set_grh(rdma_attr, NULL, 1759 uverb_attr->flow_label, 1760 uverb_attr->sgid_index, 1761 uverb_attr->hop_limit, 1762 uverb_attr->traffic_class); 1763 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); 1764 } else { 1765 rdma_ah_set_ah_flags(rdma_attr, 0); 1766 } 1767 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); 1768 rdma_ah_set_sl(rdma_attr, uverb_attr->sl); 1769 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); 1770 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); 1771 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); 1772 rdma_ah_set_make_grd(rdma_attr, false); 1773 } 1774 1775 static int modify_qp(struct uverbs_attr_bundle *attrs, 1776 struct ib_uverbs_ex_modify_qp *cmd) 1777 { 1778 struct ib_qp_attr *attr; 1779 struct ib_qp *qp; 1780 int ret; 1781 1782 attr = kzalloc(sizeof(*attr), GFP_KERNEL); 1783 if (!attr) 1784 return -ENOMEM; 1785 1786 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1787 attrs); 1788 if (!qp) { 1789 ret = -EINVAL; 1790 goto out; 1791 } 1792 1793 if ((cmd->base.attr_mask & IB_QP_PORT) && 1794 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1795 ret = -EINVAL; 1796 goto release_qp; 1797 } 1798 1799 if ((cmd->base.attr_mask & IB_QP_AV)) { 1800 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1801 ret = -EINVAL; 1802 goto release_qp; 1803 } 1804 1805 if (cmd->base.attr_mask & IB_QP_STATE && 1806 cmd->base.qp_state == IB_QPS_RTR) { 1807 /* We are in INIT->RTR TRANSITION (if we are not, 1808 * this transition will be rejected in subsequent checks). 1809 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1810 * but the IB_QP_STATE flag is required. 1811 * 1812 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1813 * when IB_QP_AV is set, has required inclusion of a valid 1814 * port number in the primary AV. (AVs are created and handled 1815 * differently for infiniband and ethernet (RoCE) ports). 1816 * 1817 * Check the port number included in the primary AV against 1818 * the port number in the qp struct, which was set (and saved) 1819 * in the RST->INIT transition. 1820 */ 1821 if (cmd->base.dest.port_num != qp->real_qp->port) { 1822 ret = -EINVAL; 1823 goto release_qp; 1824 } 1825 } else { 1826 /* We are in SQD->SQD. (If we are not, this transition will 1827 * be rejected later in the verbs layer checks). 1828 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1829 * together in the SQD->SQD transition. 1830 * 1831 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1832 * verbs layer driver does not track primary port changes 1833 * resulting from path migration. Thus, in SQD, if the primary 1834 * AV is modified, the primary port should also be modified). 1835 * 1836 * Note that in this transition, the IB_QP_STATE flag 1837 * is not allowed. 1838 */ 1839 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1840 == (IB_QP_AV | IB_QP_PORT)) && 1841 cmd->base.port_num != cmd->base.dest.port_num) { 1842 ret = -EINVAL; 1843 goto release_qp; 1844 } 1845 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1846 == IB_QP_AV) { 1847 cmd->base.attr_mask |= IB_QP_PORT; 1848 cmd->base.port_num = cmd->base.dest.port_num; 1849 } 1850 } 1851 } 1852 1853 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1854 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1855 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1856 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1857 ret = -EINVAL; 1858 goto release_qp; 1859 } 1860 1861 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1862 cmd->base.cur_qp_state > IB_QPS_ERR) || 1863 (cmd->base.attr_mask & IB_QP_STATE && 1864 cmd->base.qp_state > IB_QPS_ERR)) { 1865 ret = -EINVAL; 1866 goto release_qp; 1867 } 1868 1869 if (cmd->base.attr_mask & IB_QP_STATE) 1870 attr->qp_state = cmd->base.qp_state; 1871 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1872 attr->cur_qp_state = cmd->base.cur_qp_state; 1873 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1874 attr->path_mtu = cmd->base.path_mtu; 1875 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1876 attr->path_mig_state = cmd->base.path_mig_state; 1877 if (cmd->base.attr_mask & IB_QP_QKEY) 1878 attr->qkey = cmd->base.qkey; 1879 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1880 attr->rq_psn = cmd->base.rq_psn; 1881 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1882 attr->sq_psn = cmd->base.sq_psn; 1883 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1884 attr->dest_qp_num = cmd->base.dest_qp_num; 1885 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1886 attr->qp_access_flags = cmd->base.qp_access_flags; 1887 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1888 attr->pkey_index = cmd->base.pkey_index; 1889 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1890 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1891 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1892 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1893 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1894 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1895 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1896 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1897 if (cmd->base.attr_mask & IB_QP_PORT) 1898 attr->port_num = cmd->base.port_num; 1899 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1900 attr->timeout = cmd->base.timeout; 1901 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1902 attr->retry_cnt = cmd->base.retry_cnt; 1903 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1904 attr->rnr_retry = cmd->base.rnr_retry; 1905 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1906 attr->alt_port_num = cmd->base.alt_port_num; 1907 attr->alt_timeout = cmd->base.alt_timeout; 1908 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1909 } 1910 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1911 attr->rate_limit = cmd->rate_limit; 1912 1913 if (cmd->base.attr_mask & IB_QP_AV) 1914 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1915 &cmd->base.dest); 1916 1917 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1918 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1919 &cmd->base.alt_dest); 1920 1921 ret = ib_modify_qp_with_udata(qp, attr, 1922 modify_qp_mask(qp->qp_type, 1923 cmd->base.attr_mask), 1924 &attrs->driver_udata); 1925 1926 release_qp: 1927 uobj_put_obj_read(qp); 1928 out: 1929 kfree(attr); 1930 1931 return ret; 1932 } 1933 1934 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1935 { 1936 struct ib_uverbs_ex_modify_qp cmd; 1937 int ret; 1938 1939 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1940 if (ret) 1941 return ret; 1942 1943 if (cmd.base.attr_mask & 1944 ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1)) 1945 return -EOPNOTSUPP; 1946 1947 return modify_qp(attrs, &cmd); 1948 } 1949 1950 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1951 { 1952 struct ib_uverbs_ex_modify_qp cmd; 1953 struct ib_uverbs_ex_modify_qp_resp resp = { 1954 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1955 }; 1956 int ret; 1957 1958 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1959 if (ret) 1960 return ret; 1961 1962 /* 1963 * Last bit is reserved for extending the attr_mask by 1964 * using another field. 1965 */ 1966 BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31)); 1967 1968 if (cmd.base.attr_mask & 1969 ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1)) 1970 return -EOPNOTSUPP; 1971 1972 ret = modify_qp(attrs, &cmd); 1973 if (ret) 1974 return ret; 1975 1976 return uverbs_response(attrs, &resp, sizeof(resp)); 1977 } 1978 1979 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1980 { 1981 struct ib_uverbs_destroy_qp cmd; 1982 struct ib_uverbs_destroy_qp_resp resp; 1983 struct ib_uobject *uobj; 1984 struct ib_uqp_object *obj; 1985 int ret; 1986 1987 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1988 if (ret) 1989 return ret; 1990 1991 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1992 if (IS_ERR(uobj)) 1993 return PTR_ERR(uobj); 1994 1995 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1996 memset(&resp, 0, sizeof(resp)); 1997 resp.events_reported = obj->uevent.events_reported; 1998 1999 uobj_put_destroy(uobj); 2000 2001 return uverbs_response(attrs, &resp, sizeof(resp)); 2002 } 2003 2004 static void *alloc_wr(size_t wr_size, __u32 num_sge) 2005 { 2006 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) / 2007 sizeof (struct ib_sge)) 2008 return NULL; 2009 2010 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) + 2011 num_sge * sizeof (struct ib_sge), GFP_KERNEL); 2012 } 2013 2014 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 2015 { 2016 struct ib_uverbs_post_send cmd; 2017 struct ib_uverbs_post_send_resp resp; 2018 struct ib_uverbs_send_wr *user_wr; 2019 struct ib_send_wr *wr = NULL, *last, *next; 2020 const struct ib_send_wr *bad_wr; 2021 struct ib_qp *qp; 2022 int i, sg_ind; 2023 int is_ud; 2024 int ret, ret2; 2025 size_t next_size; 2026 const struct ib_sge __user *sgls; 2027 const void __user *wqes; 2028 struct uverbs_req_iter iter; 2029 2030 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2031 if (ret) 2032 return ret; 2033 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count); 2034 if (IS_ERR(wqes)) 2035 return PTR_ERR(wqes); 2036 sgls = uverbs_request_next_ptr( 2037 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge)); 2038 if (IS_ERR(sgls)) 2039 return PTR_ERR(sgls); 2040 ret = uverbs_request_finish(&iter); 2041 if (ret) 2042 return ret; 2043 2044 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2045 if (!user_wr) 2046 return -ENOMEM; 2047 2048 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2049 if (!qp) { 2050 ret = -EINVAL; 2051 goto out; 2052 } 2053 2054 is_ud = qp->qp_type == IB_QPT_UD; 2055 sg_ind = 0; 2056 last = NULL; 2057 for (i = 0; i < cmd.wr_count; ++i) { 2058 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size, 2059 cmd.wqe_size)) { 2060 ret = -EFAULT; 2061 goto out_put; 2062 } 2063 2064 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2065 ret = -EINVAL; 2066 goto out_put; 2067 } 2068 2069 if (is_ud) { 2070 struct ib_ud_wr *ud; 2071 2072 if (user_wr->opcode != IB_WR_SEND && 2073 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2074 ret = -EINVAL; 2075 goto out_put; 2076 } 2077 2078 next_size = sizeof(*ud); 2079 ud = alloc_wr(next_size, user_wr->num_sge); 2080 if (!ud) { 2081 ret = -ENOMEM; 2082 goto out_put; 2083 } 2084 2085 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2086 user_wr->wr.ud.ah, attrs); 2087 if (!ud->ah) { 2088 kfree(ud); 2089 ret = -EINVAL; 2090 goto out_put; 2091 } 2092 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2093 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2094 2095 next = &ud->wr; 2096 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2097 user_wr->opcode == IB_WR_RDMA_WRITE || 2098 user_wr->opcode == IB_WR_RDMA_READ) { 2099 struct ib_rdma_wr *rdma; 2100 2101 next_size = sizeof(*rdma); 2102 rdma = alloc_wr(next_size, user_wr->num_sge); 2103 if (!rdma) { 2104 ret = -ENOMEM; 2105 goto out_put; 2106 } 2107 2108 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2109 rdma->rkey = user_wr->wr.rdma.rkey; 2110 2111 next = &rdma->wr; 2112 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2113 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2114 struct ib_atomic_wr *atomic; 2115 2116 next_size = sizeof(*atomic); 2117 atomic = alloc_wr(next_size, user_wr->num_sge); 2118 if (!atomic) { 2119 ret = -ENOMEM; 2120 goto out_put; 2121 } 2122 2123 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2124 atomic->compare_add = user_wr->wr.atomic.compare_add; 2125 atomic->swap = user_wr->wr.atomic.swap; 2126 atomic->rkey = user_wr->wr.atomic.rkey; 2127 2128 next = &atomic->wr; 2129 } else if (user_wr->opcode == IB_WR_SEND || 2130 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2131 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2132 next_size = sizeof(*next); 2133 next = alloc_wr(next_size, user_wr->num_sge); 2134 if (!next) { 2135 ret = -ENOMEM; 2136 goto out_put; 2137 } 2138 } else { 2139 ret = -EINVAL; 2140 goto out_put; 2141 } 2142 2143 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2144 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2145 next->ex.imm_data = 2146 (__be32 __force) user_wr->ex.imm_data; 2147 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2148 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2149 } 2150 2151 if (!last) 2152 wr = next; 2153 else 2154 last->next = next; 2155 last = next; 2156 2157 next->next = NULL; 2158 next->wr_id = user_wr->wr_id; 2159 next->num_sge = user_wr->num_sge; 2160 next->opcode = user_wr->opcode; 2161 next->send_flags = user_wr->send_flags; 2162 2163 if (next->num_sge) { 2164 next->sg_list = (void *) next + 2165 ALIGN(next_size, sizeof(struct ib_sge)); 2166 if (copy_from_user(next->sg_list, sgls + sg_ind, 2167 next->num_sge * 2168 sizeof(struct ib_sge))) { 2169 ret = -EFAULT; 2170 goto out_put; 2171 } 2172 sg_ind += next->num_sge; 2173 } else 2174 next->sg_list = NULL; 2175 } 2176 2177 resp.bad_wr = 0; 2178 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr); 2179 if (ret) 2180 for (next = wr; next; next = next->next) { 2181 ++resp.bad_wr; 2182 if (next == bad_wr) 2183 break; 2184 } 2185 2186 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2187 if (ret2) 2188 ret = ret2; 2189 2190 out_put: 2191 uobj_put_obj_read(qp); 2192 2193 while (wr) { 2194 if (is_ud && ud_wr(wr)->ah) 2195 uobj_put_obj_read(ud_wr(wr)->ah); 2196 next = wr->next; 2197 kfree(wr); 2198 wr = next; 2199 } 2200 2201 out: 2202 kfree(user_wr); 2203 2204 return ret; 2205 } 2206 2207 static struct ib_recv_wr * 2208 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2209 u32 wqe_size, u32 sge_count) 2210 { 2211 struct ib_uverbs_recv_wr *user_wr; 2212 struct ib_recv_wr *wr = NULL, *last, *next; 2213 int sg_ind; 2214 int i; 2215 int ret; 2216 const struct ib_sge __user *sgls; 2217 const void __user *wqes; 2218 2219 if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) 2220 return ERR_PTR(-EINVAL); 2221 2222 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count); 2223 if (IS_ERR(wqes)) 2224 return ERR_CAST(wqes); 2225 sgls = uverbs_request_next_ptr( 2226 iter, sge_count * sizeof(struct ib_uverbs_sge)); 2227 if (IS_ERR(sgls)) 2228 return ERR_CAST(sgls); 2229 ret = uverbs_request_finish(iter); 2230 if (ret) 2231 return ERR_PTR(ret); 2232 2233 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2234 if (!user_wr) 2235 return ERR_PTR(-ENOMEM); 2236 2237 sg_ind = 0; 2238 last = NULL; 2239 for (i = 0; i < wr_count; ++i) { 2240 if (copy_from_user(user_wr, wqes + i * wqe_size, 2241 wqe_size)) { 2242 ret = -EFAULT; 2243 goto err; 2244 } 2245 2246 if (user_wr->num_sge + sg_ind > sge_count) { 2247 ret = -EINVAL; 2248 goto err; 2249 } 2250 2251 if (user_wr->num_sge >= 2252 (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) / 2253 sizeof (struct ib_sge)) { 2254 ret = -EINVAL; 2255 goto err; 2256 } 2257 2258 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + 2259 user_wr->num_sge * sizeof (struct ib_sge), 2260 GFP_KERNEL); 2261 if (!next) { 2262 ret = -ENOMEM; 2263 goto err; 2264 } 2265 2266 if (!last) 2267 wr = next; 2268 else 2269 last->next = next; 2270 last = next; 2271 2272 next->next = NULL; 2273 next->wr_id = user_wr->wr_id; 2274 next->num_sge = user_wr->num_sge; 2275 2276 if (next->num_sge) { 2277 next->sg_list = (void *) next + 2278 ALIGN(sizeof *next, sizeof (struct ib_sge)); 2279 if (copy_from_user(next->sg_list, sgls + sg_ind, 2280 next->num_sge * 2281 sizeof(struct ib_sge))) { 2282 ret = -EFAULT; 2283 goto err; 2284 } 2285 sg_ind += next->num_sge; 2286 } else 2287 next->sg_list = NULL; 2288 } 2289 2290 kfree(user_wr); 2291 return wr; 2292 2293 err: 2294 kfree(user_wr); 2295 2296 while (wr) { 2297 next = wr->next; 2298 kfree(wr); 2299 wr = next; 2300 } 2301 2302 return ERR_PTR(ret); 2303 } 2304 2305 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2306 { 2307 struct ib_uverbs_post_recv cmd; 2308 struct ib_uverbs_post_recv_resp resp; 2309 struct ib_recv_wr *wr, *next; 2310 const struct ib_recv_wr *bad_wr; 2311 struct ib_qp *qp; 2312 int ret, ret2; 2313 struct uverbs_req_iter iter; 2314 2315 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2316 if (ret) 2317 return ret; 2318 2319 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2320 cmd.sge_count); 2321 if (IS_ERR(wr)) 2322 return PTR_ERR(wr); 2323 2324 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2325 if (!qp) { 2326 ret = -EINVAL; 2327 goto out; 2328 } 2329 2330 resp.bad_wr = 0; 2331 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); 2332 2333 uobj_put_obj_read(qp); 2334 if (ret) { 2335 for (next = wr; next; next = next->next) { 2336 ++resp.bad_wr; 2337 if (next == bad_wr) 2338 break; 2339 } 2340 } 2341 2342 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2343 if (ret2) 2344 ret = ret2; 2345 out: 2346 while (wr) { 2347 next = wr->next; 2348 kfree(wr); 2349 wr = next; 2350 } 2351 2352 return ret; 2353 } 2354 2355 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2356 { 2357 struct ib_uverbs_post_srq_recv cmd; 2358 struct ib_uverbs_post_srq_recv_resp resp; 2359 struct ib_recv_wr *wr, *next; 2360 const struct ib_recv_wr *bad_wr; 2361 struct ib_srq *srq; 2362 int ret, ret2; 2363 struct uverbs_req_iter iter; 2364 2365 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2366 if (ret) 2367 return ret; 2368 2369 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2370 cmd.sge_count); 2371 if (IS_ERR(wr)) 2372 return PTR_ERR(wr); 2373 2374 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2375 if (!srq) { 2376 ret = -EINVAL; 2377 goto out; 2378 } 2379 2380 resp.bad_wr = 0; 2381 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); 2382 2383 uobj_put_obj_read(srq); 2384 2385 if (ret) 2386 for (next = wr; next; next = next->next) { 2387 ++resp.bad_wr; 2388 if (next == bad_wr) 2389 break; 2390 } 2391 2392 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2393 if (ret2) 2394 ret = ret2; 2395 2396 out: 2397 while (wr) { 2398 next = wr->next; 2399 kfree(wr); 2400 wr = next; 2401 } 2402 2403 return ret; 2404 } 2405 2406 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2407 { 2408 struct ib_uverbs_create_ah cmd; 2409 struct ib_uverbs_create_ah_resp resp; 2410 struct ib_uobject *uobj; 2411 struct ib_pd *pd; 2412 struct ib_ah *ah; 2413 struct rdma_ah_attr attr = {}; 2414 int ret; 2415 struct ib_device *ib_dev; 2416 2417 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2418 if (ret) 2419 return ret; 2420 2421 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2422 if (IS_ERR(uobj)) 2423 return PTR_ERR(uobj); 2424 2425 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2426 ret = -EINVAL; 2427 goto err; 2428 } 2429 2430 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2431 if (!pd) { 2432 ret = -EINVAL; 2433 goto err; 2434 } 2435 2436 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); 2437 rdma_ah_set_make_grd(&attr, false); 2438 rdma_ah_set_dlid(&attr, cmd.attr.dlid); 2439 rdma_ah_set_sl(&attr, cmd.attr.sl); 2440 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); 2441 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); 2442 rdma_ah_set_port_num(&attr, cmd.attr.port_num); 2443 2444 if (cmd.attr.is_global) { 2445 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, 2446 cmd.attr.grh.sgid_index, 2447 cmd.attr.grh.hop_limit, 2448 cmd.attr.grh.traffic_class); 2449 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); 2450 } else { 2451 rdma_ah_set_ah_flags(&attr, 0); 2452 } 2453 2454 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); 2455 if (IS_ERR(ah)) { 2456 ret = PTR_ERR(ah); 2457 goto err_put; 2458 } 2459 2460 ah->uobject = uobj; 2461 uobj->user_handle = cmd.user_handle; 2462 uobj->object = ah; 2463 2464 resp.ah_handle = uobj->id; 2465 2466 ret = uverbs_response(attrs, &resp, sizeof(resp)); 2467 if (ret) 2468 goto err_copy; 2469 2470 uobj_put_obj_read(pd); 2471 return uobj_alloc_commit(uobj, attrs); 2472 2473 err_copy: 2474 rdma_destroy_ah_user(ah, RDMA_DESTROY_AH_SLEEPABLE, 2475 uverbs_get_cleared_udata(attrs)); 2476 2477 err_put: 2478 uobj_put_obj_read(pd); 2479 2480 err: 2481 uobj_alloc_abort(uobj, attrs); 2482 return ret; 2483 } 2484 2485 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2486 { 2487 struct ib_uverbs_destroy_ah cmd; 2488 int ret; 2489 2490 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2491 if (ret) 2492 return ret; 2493 2494 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2495 } 2496 2497 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2498 { 2499 struct ib_uverbs_attach_mcast cmd; 2500 struct ib_qp *qp; 2501 struct ib_uqp_object *obj; 2502 struct ib_uverbs_mcast_entry *mcast; 2503 int ret; 2504 2505 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2506 if (ret) 2507 return ret; 2508 2509 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2510 if (!qp) 2511 return -EINVAL; 2512 2513 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); 2514 2515 mutex_lock(&obj->mcast_lock); 2516 list_for_each_entry(mcast, &obj->mcast_list, list) 2517 if (cmd.mlid == mcast->lid && 2518 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2519 ret = 0; 2520 goto out_put; 2521 } 2522 2523 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2524 if (!mcast) { 2525 ret = -ENOMEM; 2526 goto out_put; 2527 } 2528 2529 mcast->lid = cmd.mlid; 2530 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2531 2532 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2533 if (!ret) 2534 list_add_tail(&mcast->list, &obj->mcast_list); 2535 else 2536 kfree(mcast); 2537 2538 out_put: 2539 mutex_unlock(&obj->mcast_lock); 2540 uobj_put_obj_read(qp); 2541 2542 return ret; 2543 } 2544 2545 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2546 { 2547 struct ib_uverbs_detach_mcast cmd; 2548 struct ib_uqp_object *obj; 2549 struct ib_qp *qp; 2550 struct ib_uverbs_mcast_entry *mcast; 2551 int ret; 2552 bool found = false; 2553 2554 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2555 if (ret) 2556 return ret; 2557 2558 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2559 if (!qp) 2560 return -EINVAL; 2561 2562 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); 2563 mutex_lock(&obj->mcast_lock); 2564 2565 list_for_each_entry(mcast, &obj->mcast_list, list) 2566 if (cmd.mlid == mcast->lid && 2567 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2568 list_del(&mcast->list); 2569 kfree(mcast); 2570 found = true; 2571 break; 2572 } 2573 2574 if (!found) { 2575 ret = -EINVAL; 2576 goto out_put; 2577 } 2578 2579 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2580 2581 out_put: 2582 mutex_unlock(&obj->mcast_lock); 2583 uobj_put_obj_read(qp); 2584 return ret; 2585 } 2586 2587 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2588 { 2589 struct ib_uflow_resources *resources; 2590 2591 resources = kzalloc(sizeof(*resources), GFP_KERNEL); 2592 2593 if (!resources) 2594 return NULL; 2595 2596 if (!num_specs) 2597 goto out; 2598 2599 resources->counters = 2600 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); 2601 resources->collection = 2602 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); 2603 2604 if (!resources->counters || !resources->collection) 2605 goto err; 2606 2607 out: 2608 resources->max = num_specs; 2609 return resources; 2610 2611 err: 2612 kfree(resources->counters); 2613 kfree(resources); 2614 2615 return NULL; 2616 } 2617 EXPORT_SYMBOL(flow_resources_alloc); 2618 2619 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2620 { 2621 unsigned int i; 2622 2623 if (!uflow_res) 2624 return; 2625 2626 for (i = 0; i < uflow_res->collection_num; i++) 2627 atomic_dec(&uflow_res->collection[i]->usecnt); 2628 2629 for (i = 0; i < uflow_res->counters_num; i++) 2630 atomic_dec(&uflow_res->counters[i]->usecnt); 2631 2632 kfree(uflow_res->collection); 2633 kfree(uflow_res->counters); 2634 kfree(uflow_res); 2635 } 2636 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2637 2638 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2639 enum ib_flow_spec_type type, 2640 void *ibobj) 2641 { 2642 WARN_ON(uflow_res->num >= uflow_res->max); 2643 2644 switch (type) { 2645 case IB_FLOW_SPEC_ACTION_HANDLE: 2646 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2647 uflow_res->collection[uflow_res->collection_num++] = 2648 (struct ib_flow_action *)ibobj; 2649 break; 2650 case IB_FLOW_SPEC_ACTION_COUNT: 2651 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2652 uflow_res->counters[uflow_res->counters_num++] = 2653 (struct ib_counters *)ibobj; 2654 break; 2655 default: 2656 WARN_ON(1); 2657 } 2658 2659 uflow_res->num++; 2660 } 2661 EXPORT_SYMBOL(flow_resources_add); 2662 2663 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2664 struct ib_uverbs_flow_spec *kern_spec, 2665 union ib_flow_spec *ib_spec, 2666 struct ib_uflow_resources *uflow_res) 2667 { 2668 ib_spec->type = kern_spec->type; 2669 switch (ib_spec->type) { 2670 case IB_FLOW_SPEC_ACTION_TAG: 2671 if (kern_spec->flow_tag.size != 2672 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2673 return -EINVAL; 2674 2675 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2676 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2677 break; 2678 case IB_FLOW_SPEC_ACTION_DROP: 2679 if (kern_spec->drop.size != 2680 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2681 return -EINVAL; 2682 2683 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2684 break; 2685 case IB_FLOW_SPEC_ACTION_HANDLE: 2686 if (kern_spec->action.size != 2687 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2688 return -EOPNOTSUPP; 2689 ib_spec->action.act = uobj_get_obj_read(flow_action, 2690 UVERBS_OBJECT_FLOW_ACTION, 2691 kern_spec->action.handle, 2692 attrs); 2693 if (!ib_spec->action.act) 2694 return -EINVAL; 2695 ib_spec->action.size = 2696 sizeof(struct ib_flow_spec_action_handle); 2697 flow_resources_add(uflow_res, 2698 IB_FLOW_SPEC_ACTION_HANDLE, 2699 ib_spec->action.act); 2700 uobj_put_obj_read(ib_spec->action.act); 2701 break; 2702 case IB_FLOW_SPEC_ACTION_COUNT: 2703 if (kern_spec->flow_count.size != 2704 sizeof(struct ib_uverbs_flow_spec_action_count)) 2705 return -EINVAL; 2706 ib_spec->flow_count.counters = 2707 uobj_get_obj_read(counters, 2708 UVERBS_OBJECT_COUNTERS, 2709 kern_spec->flow_count.handle, 2710 attrs); 2711 if (!ib_spec->flow_count.counters) 2712 return -EINVAL; 2713 ib_spec->flow_count.size = 2714 sizeof(struct ib_flow_spec_action_count); 2715 flow_resources_add(uflow_res, 2716 IB_FLOW_SPEC_ACTION_COUNT, 2717 ib_spec->flow_count.counters); 2718 uobj_put_obj_read(ib_spec->flow_count.counters); 2719 break; 2720 default: 2721 return -EINVAL; 2722 } 2723 return 0; 2724 } 2725 2726 static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec) 2727 { 2728 /* Returns user space filter size, includes padding */ 2729 return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2; 2730 } 2731 2732 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2733 u16 ib_real_filter_sz) 2734 { 2735 /* 2736 * User space filter structures must be 64 bit aligned, otherwise this 2737 * may pass, but we won't handle additional new attributes. 2738 */ 2739 2740 if (kern_filter_size > ib_real_filter_sz) { 2741 if (memchr_inv(kern_spec_filter + 2742 ib_real_filter_sz, 0, 2743 kern_filter_size - ib_real_filter_sz)) 2744 return -EINVAL; 2745 return ib_real_filter_sz; 2746 } 2747 return kern_filter_size; 2748 } 2749 2750 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2751 const void *kern_spec_mask, 2752 const void *kern_spec_val, 2753 size_t kern_filter_sz, 2754 union ib_flow_spec *ib_spec) 2755 { 2756 ssize_t actual_filter_sz; 2757 ssize_t ib_filter_sz; 2758 2759 /* User flow spec size must be aligned to 4 bytes */ 2760 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2761 return -EINVAL; 2762 2763 ib_spec->type = type; 2764 2765 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2766 return -EINVAL; 2767 2768 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2769 case IB_FLOW_SPEC_ETH: 2770 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz); 2771 actual_filter_sz = spec_filter_size(kern_spec_mask, 2772 kern_filter_sz, 2773 ib_filter_sz); 2774 if (actual_filter_sz <= 0) 2775 return -EINVAL; 2776 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2777 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2778 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2779 break; 2780 case IB_FLOW_SPEC_IPV4: 2781 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz); 2782 actual_filter_sz = spec_filter_size(kern_spec_mask, 2783 kern_filter_sz, 2784 ib_filter_sz); 2785 if (actual_filter_sz <= 0) 2786 return -EINVAL; 2787 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2788 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2789 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2790 break; 2791 case IB_FLOW_SPEC_IPV6: 2792 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz); 2793 actual_filter_sz = spec_filter_size(kern_spec_mask, 2794 kern_filter_sz, 2795 ib_filter_sz); 2796 if (actual_filter_sz <= 0) 2797 return -EINVAL; 2798 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2799 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2800 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2801 2802 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2803 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2804 return -EINVAL; 2805 break; 2806 case IB_FLOW_SPEC_TCP: 2807 case IB_FLOW_SPEC_UDP: 2808 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz); 2809 actual_filter_sz = spec_filter_size(kern_spec_mask, 2810 kern_filter_sz, 2811 ib_filter_sz); 2812 if (actual_filter_sz <= 0) 2813 return -EINVAL; 2814 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2815 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2816 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2817 break; 2818 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2819 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz); 2820 actual_filter_sz = spec_filter_size(kern_spec_mask, 2821 kern_filter_sz, 2822 ib_filter_sz); 2823 if (actual_filter_sz <= 0) 2824 return -EINVAL; 2825 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2826 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2827 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2828 2829 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2830 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2831 return -EINVAL; 2832 break; 2833 case IB_FLOW_SPEC_ESP: 2834 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz); 2835 actual_filter_sz = spec_filter_size(kern_spec_mask, 2836 kern_filter_sz, 2837 ib_filter_sz); 2838 if (actual_filter_sz <= 0) 2839 return -EINVAL; 2840 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2841 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2842 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2843 break; 2844 case IB_FLOW_SPEC_GRE: 2845 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz); 2846 actual_filter_sz = spec_filter_size(kern_spec_mask, 2847 kern_filter_sz, 2848 ib_filter_sz); 2849 if (actual_filter_sz <= 0) 2850 return -EINVAL; 2851 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2852 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2853 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2854 break; 2855 case IB_FLOW_SPEC_MPLS: 2856 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz); 2857 actual_filter_sz = spec_filter_size(kern_spec_mask, 2858 kern_filter_sz, 2859 ib_filter_sz); 2860 if (actual_filter_sz <= 0) 2861 return -EINVAL; 2862 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2863 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2864 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2865 break; 2866 default: 2867 return -EINVAL; 2868 } 2869 return 0; 2870 } 2871 2872 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2873 union ib_flow_spec *ib_spec) 2874 { 2875 ssize_t kern_filter_sz; 2876 void *kern_spec_mask; 2877 void *kern_spec_val; 2878 2879 kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr); 2880 2881 kern_spec_val = (void *)kern_spec + 2882 sizeof(struct ib_uverbs_flow_spec_hdr); 2883 kern_spec_mask = kern_spec_val + kern_filter_sz; 2884 2885 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2886 kern_spec_mask, 2887 kern_spec_val, 2888 kern_filter_sz, ib_spec); 2889 } 2890 2891 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2892 struct ib_uverbs_flow_spec *kern_spec, 2893 union ib_flow_spec *ib_spec, 2894 struct ib_uflow_resources *uflow_res) 2895 { 2896 if (kern_spec->reserved) 2897 return -EINVAL; 2898 2899 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2900 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2901 uflow_res); 2902 else 2903 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2904 } 2905 2906 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2907 { 2908 struct ib_uverbs_ex_create_wq cmd; 2909 struct ib_uverbs_ex_create_wq_resp resp = {}; 2910 struct ib_uwq_object *obj; 2911 int err = 0; 2912 struct ib_cq *cq; 2913 struct ib_pd *pd; 2914 struct ib_wq *wq; 2915 struct ib_wq_init_attr wq_init_attr = {}; 2916 struct ib_device *ib_dev; 2917 2918 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2919 if (err) 2920 return err; 2921 2922 if (cmd.comp_mask) 2923 return -EOPNOTSUPP; 2924 2925 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2926 &ib_dev); 2927 if (IS_ERR(obj)) 2928 return PTR_ERR(obj); 2929 2930 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2931 if (!pd) { 2932 err = -EINVAL; 2933 goto err_uobj; 2934 } 2935 2936 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2937 if (!cq) { 2938 err = -EINVAL; 2939 goto err_put_pd; 2940 } 2941 2942 wq_init_attr.cq = cq; 2943 wq_init_attr.max_sge = cmd.max_sge; 2944 wq_init_attr.max_wr = cmd.max_wr; 2945 wq_init_attr.wq_context = attrs->ufile; 2946 wq_init_attr.wq_type = cmd.wq_type; 2947 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2948 wq_init_attr.create_flags = cmd.create_flags; 2949 obj->uevent.events_reported = 0; 2950 INIT_LIST_HEAD(&obj->uevent.event_list); 2951 2952 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2953 if (IS_ERR(wq)) { 2954 err = PTR_ERR(wq); 2955 goto err_put_cq; 2956 } 2957 2958 wq->uobject = &obj->uevent.uobject; 2959 obj->uevent.uobject.object = wq; 2960 wq->wq_type = wq_init_attr.wq_type; 2961 wq->cq = cq; 2962 wq->pd = pd; 2963 wq->device = pd->device; 2964 wq->wq_context = wq_init_attr.wq_context; 2965 atomic_set(&wq->usecnt, 0); 2966 atomic_inc(&pd->usecnt); 2967 atomic_inc(&cq->usecnt); 2968 wq->uobject = &obj->uevent.uobject; 2969 obj->uevent.uobject.object = wq; 2970 2971 memset(&resp, 0, sizeof(resp)); 2972 resp.wq_handle = obj->uevent.uobject.id; 2973 resp.max_sge = wq_init_attr.max_sge; 2974 resp.max_wr = wq_init_attr.max_wr; 2975 resp.wqn = wq->wq_num; 2976 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2977 err = uverbs_response(attrs, &resp, sizeof(resp)); 2978 if (err) 2979 goto err_copy; 2980 2981 uobj_put_obj_read(pd); 2982 uobj_put_obj_read(cq); 2983 return uobj_alloc_commit(&obj->uevent.uobject, attrs); 2984 2985 err_copy: 2986 ib_destroy_wq(wq, uverbs_get_cleared_udata(attrs)); 2987 err_put_cq: 2988 uobj_put_obj_read(cq); 2989 err_put_pd: 2990 uobj_put_obj_read(pd); 2991 err_uobj: 2992 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2993 2994 return err; 2995 } 2996 2997 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2998 { 2999 struct ib_uverbs_ex_destroy_wq cmd; 3000 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 3001 struct ib_uobject *uobj; 3002 struct ib_uwq_object *obj; 3003 int ret; 3004 3005 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3006 if (ret) 3007 return ret; 3008 3009 if (cmd.comp_mask) 3010 return -EOPNOTSUPP; 3011 3012 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3013 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3014 if (IS_ERR(uobj)) 3015 return PTR_ERR(uobj); 3016 3017 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 3018 resp.events_reported = obj->uevent.events_reported; 3019 3020 uobj_put_destroy(uobj); 3021 3022 return uverbs_response(attrs, &resp, sizeof(resp)); 3023 } 3024 3025 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 3026 { 3027 struct ib_uverbs_ex_modify_wq cmd; 3028 struct ib_wq *wq; 3029 struct ib_wq_attr wq_attr = {}; 3030 int ret; 3031 3032 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3033 if (ret) 3034 return ret; 3035 3036 if (!cmd.attr_mask) 3037 return -EINVAL; 3038 3039 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3040 return -EINVAL; 3041 3042 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3043 if (!wq) 3044 return -EINVAL; 3045 3046 wq_attr.curr_wq_state = cmd.curr_wq_state; 3047 wq_attr.wq_state = cmd.wq_state; 3048 if (cmd.attr_mask & IB_WQ_FLAGS) { 3049 wq_attr.flags = cmd.flags; 3050 wq_attr.flags_mask = cmd.flags_mask; 3051 } 3052 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, 3053 &attrs->driver_udata); 3054 uobj_put_obj_read(wq); 3055 return ret; 3056 } 3057 3058 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3059 { 3060 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3061 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3062 struct ib_uobject *uobj; 3063 int err; 3064 struct ib_rwq_ind_table_init_attr init_attr = {}; 3065 struct ib_rwq_ind_table *rwq_ind_tbl; 3066 struct ib_wq **wqs = NULL; 3067 u32 *wqs_handles = NULL; 3068 struct ib_wq *wq = NULL; 3069 int i, j, num_read_wqs; 3070 u32 num_wq_handles; 3071 struct uverbs_req_iter iter; 3072 struct ib_device *ib_dev; 3073 3074 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3075 if (err) 3076 return err; 3077 3078 if (cmd.comp_mask) 3079 return -EOPNOTSUPP; 3080 3081 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3082 return -EINVAL; 3083 3084 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3085 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3086 GFP_KERNEL); 3087 if (!wqs_handles) 3088 return -ENOMEM; 3089 3090 err = uverbs_request_next(&iter, wqs_handles, 3091 num_wq_handles * sizeof(__u32)); 3092 if (err) 3093 goto err_free; 3094 3095 err = uverbs_request_finish(&iter); 3096 if (err) 3097 goto err_free; 3098 3099 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); 3100 if (!wqs) { 3101 err = -ENOMEM; 3102 goto err_free; 3103 } 3104 3105 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3106 num_read_wqs++) { 3107 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3108 wqs_handles[num_read_wqs], attrs); 3109 if (!wq) { 3110 err = -EINVAL; 3111 goto put_wqs; 3112 } 3113 3114 wqs[num_read_wqs] = wq; 3115 } 3116 3117 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3118 if (IS_ERR(uobj)) { 3119 err = PTR_ERR(uobj); 3120 goto put_wqs; 3121 } 3122 3123 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3124 init_attr.ind_tbl = wqs; 3125 3126 rwq_ind_tbl = ib_dev->ops.create_rwq_ind_table(ib_dev, &init_attr, 3127 &attrs->driver_udata); 3128 3129 if (IS_ERR(rwq_ind_tbl)) { 3130 err = PTR_ERR(rwq_ind_tbl); 3131 goto err_uobj; 3132 } 3133 3134 rwq_ind_tbl->ind_tbl = wqs; 3135 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3136 rwq_ind_tbl->uobject = uobj; 3137 uobj->object = rwq_ind_tbl; 3138 rwq_ind_tbl->device = ib_dev; 3139 atomic_set(&rwq_ind_tbl->usecnt, 0); 3140 3141 for (i = 0; i < num_wq_handles; i++) 3142 atomic_inc(&wqs[i]->usecnt); 3143 3144 resp.ind_tbl_handle = uobj->id; 3145 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3146 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3147 3148 err = uverbs_response(attrs, &resp, sizeof(resp)); 3149 if (err) 3150 goto err_copy; 3151 3152 kfree(wqs_handles); 3153 3154 for (j = 0; j < num_read_wqs; j++) 3155 uobj_put_obj_read(wqs[j]); 3156 3157 return uobj_alloc_commit(uobj, attrs); 3158 3159 err_copy: 3160 ib_destroy_rwq_ind_table(rwq_ind_tbl); 3161 err_uobj: 3162 uobj_alloc_abort(uobj, attrs); 3163 put_wqs: 3164 for (j = 0; j < num_read_wqs; j++) 3165 uobj_put_obj_read(wqs[j]); 3166 err_free: 3167 kfree(wqs_handles); 3168 kfree(wqs); 3169 return err; 3170 } 3171 3172 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3173 { 3174 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3175 int ret; 3176 3177 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3178 if (ret) 3179 return ret; 3180 3181 if (cmd.comp_mask) 3182 return -EOPNOTSUPP; 3183 3184 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3185 cmd.ind_tbl_handle, attrs); 3186 } 3187 3188 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3189 { 3190 struct ib_uverbs_create_flow cmd; 3191 struct ib_uverbs_create_flow_resp resp; 3192 struct ib_uobject *uobj; 3193 struct ib_flow *flow_id; 3194 struct ib_uverbs_flow_attr *kern_flow_attr; 3195 struct ib_flow_attr *flow_attr; 3196 struct ib_qp *qp; 3197 struct ib_uflow_resources *uflow_res; 3198 struct ib_uverbs_flow_spec_hdr *kern_spec; 3199 struct uverbs_req_iter iter; 3200 int err; 3201 void *ib_spec; 3202 int i; 3203 struct ib_device *ib_dev; 3204 3205 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3206 if (err) 3207 return err; 3208 3209 if (cmd.comp_mask) 3210 return -EINVAL; 3211 3212 if (!capable(CAP_NET_RAW)) 3213 return -EPERM; 3214 3215 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3216 return -EINVAL; 3217 3218 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3219 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3220 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3221 return -EINVAL; 3222 3223 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3224 return -EINVAL; 3225 3226 if (cmd.flow_attr.size > 3227 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3228 return -EINVAL; 3229 3230 if (cmd.flow_attr.reserved[0] || 3231 cmd.flow_attr.reserved[1]) 3232 return -EINVAL; 3233 3234 if (cmd.flow_attr.num_of_specs) { 3235 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3236 GFP_KERNEL); 3237 if (!kern_flow_attr) 3238 return -ENOMEM; 3239 3240 *kern_flow_attr = cmd.flow_attr; 3241 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3242 cmd.flow_attr.size); 3243 if (err) 3244 goto err_free_attr; 3245 } else { 3246 kern_flow_attr = &cmd.flow_attr; 3247 } 3248 3249 err = uverbs_request_finish(&iter); 3250 if (err) 3251 goto err_free_attr; 3252 3253 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3254 if (IS_ERR(uobj)) { 3255 err = PTR_ERR(uobj); 3256 goto err_free_attr; 3257 } 3258 3259 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3260 if (!qp) { 3261 err = -EINVAL; 3262 goto err_uobj; 3263 } 3264 3265 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3266 err = -EINVAL; 3267 goto err_put; 3268 } 3269 3270 flow_attr = kzalloc(struct_size(flow_attr, flows, 3271 cmd.flow_attr.num_of_specs), GFP_KERNEL); 3272 if (!flow_attr) { 3273 err = -ENOMEM; 3274 goto err_put; 3275 } 3276 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3277 if (!uflow_res) { 3278 err = -ENOMEM; 3279 goto err_free_flow_attr; 3280 } 3281 3282 flow_attr->type = kern_flow_attr->type; 3283 flow_attr->priority = kern_flow_attr->priority; 3284 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3285 flow_attr->port = kern_flow_attr->port; 3286 flow_attr->flags = kern_flow_attr->flags; 3287 flow_attr->size = sizeof(*flow_attr); 3288 3289 kern_spec = kern_flow_attr->flow_specs; 3290 ib_spec = flow_attr + 1; 3291 for (i = 0; i < flow_attr->num_of_specs && 3292 cmd.flow_attr.size >= sizeof(*kern_spec) && 3293 cmd.flow_attr.size >= kern_spec->size; 3294 i++) { 3295 err = kern_spec_to_ib_spec( 3296 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3297 ib_spec, uflow_res); 3298 if (err) 3299 goto err_free; 3300 3301 flow_attr->size += 3302 ((union ib_flow_spec *) ib_spec)->size; 3303 cmd.flow_attr.size -= kern_spec->size; 3304 kern_spec = ((void *)kern_spec) + kern_spec->size; 3305 ib_spec += ((union ib_flow_spec *) ib_spec)->size; 3306 } 3307 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3308 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n", 3309 i, cmd.flow_attr.size); 3310 err = -EINVAL; 3311 goto err_free; 3312 } 3313 3314 flow_id = qp->device->ops.create_flow( 3315 qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata); 3316 3317 if (IS_ERR(flow_id)) { 3318 err = PTR_ERR(flow_id); 3319 goto err_free; 3320 } 3321 3322 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3323 3324 memset(&resp, 0, sizeof(resp)); 3325 resp.flow_handle = uobj->id; 3326 3327 err = uverbs_response(attrs, &resp, sizeof(resp)); 3328 if (err) 3329 goto err_copy; 3330 3331 uobj_put_obj_read(qp); 3332 kfree(flow_attr); 3333 if (cmd.flow_attr.num_of_specs) 3334 kfree(kern_flow_attr); 3335 return uobj_alloc_commit(uobj, attrs); 3336 err_copy: 3337 if (!qp->device->ops.destroy_flow(flow_id)) 3338 atomic_dec(&qp->usecnt); 3339 err_free: 3340 ib_uverbs_flow_resources_free(uflow_res); 3341 err_free_flow_attr: 3342 kfree(flow_attr); 3343 err_put: 3344 uobj_put_obj_read(qp); 3345 err_uobj: 3346 uobj_alloc_abort(uobj, attrs); 3347 err_free_attr: 3348 if (cmd.flow_attr.num_of_specs) 3349 kfree(kern_flow_attr); 3350 return err; 3351 } 3352 3353 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3354 { 3355 struct ib_uverbs_destroy_flow cmd; 3356 int ret; 3357 3358 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3359 if (ret) 3360 return ret; 3361 3362 if (cmd.comp_mask) 3363 return -EINVAL; 3364 3365 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3366 } 3367 3368 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3369 struct ib_uverbs_create_xsrq *cmd, 3370 struct ib_udata *udata) 3371 { 3372 struct ib_uverbs_create_srq_resp resp; 3373 struct ib_usrq_object *obj; 3374 struct ib_pd *pd; 3375 struct ib_srq *srq; 3376 struct ib_uobject *uninitialized_var(xrcd_uobj); 3377 struct ib_srq_init_attr attr; 3378 int ret; 3379 struct ib_device *ib_dev; 3380 3381 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3382 &ib_dev); 3383 if (IS_ERR(obj)) 3384 return PTR_ERR(obj); 3385 3386 if (cmd->srq_type == IB_SRQT_TM) 3387 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3388 3389 if (cmd->srq_type == IB_SRQT_XRC) { 3390 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3391 attrs); 3392 if (IS_ERR(xrcd_uobj)) { 3393 ret = -EINVAL; 3394 goto err; 3395 } 3396 3397 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3398 if (!attr.ext.xrc.xrcd) { 3399 ret = -EINVAL; 3400 goto err_put_xrcd; 3401 } 3402 3403 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3404 atomic_inc(&obj->uxrcd->refcnt); 3405 } 3406 3407 if (ib_srq_has_cq(cmd->srq_type)) { 3408 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3409 cmd->cq_handle, attrs); 3410 if (!attr.ext.cq) { 3411 ret = -EINVAL; 3412 goto err_put_xrcd; 3413 } 3414 } 3415 3416 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3417 if (!pd) { 3418 ret = -EINVAL; 3419 goto err_put_cq; 3420 } 3421 3422 attr.event_handler = ib_uverbs_srq_event_handler; 3423 attr.srq_context = attrs->ufile; 3424 attr.srq_type = cmd->srq_type; 3425 attr.attr.max_wr = cmd->max_wr; 3426 attr.attr.max_sge = cmd->max_sge; 3427 attr.attr.srq_limit = cmd->srq_limit; 3428 3429 obj->uevent.events_reported = 0; 3430 INIT_LIST_HEAD(&obj->uevent.event_list); 3431 3432 srq = rdma_zalloc_drv_obj(ib_dev, ib_srq); 3433 if (!srq) { 3434 ret = -ENOMEM; 3435 goto err_put; 3436 } 3437 3438 srq->device = pd->device; 3439 srq->pd = pd; 3440 srq->srq_type = cmd->srq_type; 3441 srq->uobject = &obj->uevent.uobject; 3442 srq->event_handler = attr.event_handler; 3443 srq->srq_context = attr.srq_context; 3444 3445 ret = pd->device->ops.create_srq(srq, &attr, udata); 3446 if (ret) 3447 goto err_free; 3448 3449 if (ib_srq_has_cq(cmd->srq_type)) { 3450 srq->ext.cq = attr.ext.cq; 3451 atomic_inc(&attr.ext.cq->usecnt); 3452 } 3453 3454 if (cmd->srq_type == IB_SRQT_XRC) { 3455 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd; 3456 atomic_inc(&attr.ext.xrc.xrcd->usecnt); 3457 } 3458 3459 atomic_inc(&pd->usecnt); 3460 atomic_set(&srq->usecnt, 0); 3461 3462 obj->uevent.uobject.object = srq; 3463 obj->uevent.uobject.user_handle = cmd->user_handle; 3464 3465 memset(&resp, 0, sizeof resp); 3466 resp.srq_handle = obj->uevent.uobject.id; 3467 resp.max_wr = attr.attr.max_wr; 3468 resp.max_sge = attr.attr.max_sge; 3469 if (cmd->srq_type == IB_SRQT_XRC) 3470 resp.srqn = srq->ext.xrc.srq_num; 3471 3472 ret = uverbs_response(attrs, &resp, sizeof(resp)); 3473 if (ret) 3474 goto err_copy; 3475 3476 if (cmd->srq_type == IB_SRQT_XRC) 3477 uobj_put_read(xrcd_uobj); 3478 3479 if (ib_srq_has_cq(cmd->srq_type)) 3480 uobj_put_obj_read(attr.ext.cq); 3481 3482 uobj_put_obj_read(pd); 3483 return uobj_alloc_commit(&obj->uevent.uobject, attrs); 3484 3485 err_copy: 3486 ib_destroy_srq_user(srq, uverbs_get_cleared_udata(attrs)); 3487 3488 err_free: 3489 kfree(srq); 3490 err_put: 3491 uobj_put_obj_read(pd); 3492 3493 err_put_cq: 3494 if (ib_srq_has_cq(cmd->srq_type)) 3495 uobj_put_obj_read(attr.ext.cq); 3496 3497 err_put_xrcd: 3498 if (cmd->srq_type == IB_SRQT_XRC) { 3499 atomic_dec(&obj->uxrcd->refcnt); 3500 uobj_put_read(xrcd_uobj); 3501 } 3502 3503 err: 3504 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3505 return ret; 3506 } 3507 3508 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3509 { 3510 struct ib_uverbs_create_srq cmd; 3511 struct ib_uverbs_create_xsrq xcmd; 3512 int ret; 3513 3514 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3515 if (ret) 3516 return ret; 3517 3518 memset(&xcmd, 0, sizeof(xcmd)); 3519 xcmd.response = cmd.response; 3520 xcmd.user_handle = cmd.user_handle; 3521 xcmd.srq_type = IB_SRQT_BASIC; 3522 xcmd.pd_handle = cmd.pd_handle; 3523 xcmd.max_wr = cmd.max_wr; 3524 xcmd.max_sge = cmd.max_sge; 3525 xcmd.srq_limit = cmd.srq_limit; 3526 3527 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3528 } 3529 3530 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3531 { 3532 struct ib_uverbs_create_xsrq cmd; 3533 int ret; 3534 3535 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3536 if (ret) 3537 return ret; 3538 3539 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3540 } 3541 3542 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3543 { 3544 struct ib_uverbs_modify_srq cmd; 3545 struct ib_srq *srq; 3546 struct ib_srq_attr attr; 3547 int ret; 3548 3549 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3550 if (ret) 3551 return ret; 3552 3553 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3554 if (!srq) 3555 return -EINVAL; 3556 3557 attr.max_wr = cmd.max_wr; 3558 attr.srq_limit = cmd.srq_limit; 3559 3560 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, 3561 &attrs->driver_udata); 3562 3563 uobj_put_obj_read(srq); 3564 3565 return ret; 3566 } 3567 3568 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3569 { 3570 struct ib_uverbs_query_srq cmd; 3571 struct ib_uverbs_query_srq_resp resp; 3572 struct ib_srq_attr attr; 3573 struct ib_srq *srq; 3574 int ret; 3575 3576 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3577 if (ret) 3578 return ret; 3579 3580 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3581 if (!srq) 3582 return -EINVAL; 3583 3584 ret = ib_query_srq(srq, &attr); 3585 3586 uobj_put_obj_read(srq); 3587 3588 if (ret) 3589 return ret; 3590 3591 memset(&resp, 0, sizeof resp); 3592 3593 resp.max_wr = attr.max_wr; 3594 resp.max_sge = attr.max_sge; 3595 resp.srq_limit = attr.srq_limit; 3596 3597 return uverbs_response(attrs, &resp, sizeof(resp)); 3598 } 3599 3600 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3601 { 3602 struct ib_uverbs_destroy_srq cmd; 3603 struct ib_uverbs_destroy_srq_resp resp; 3604 struct ib_uobject *uobj; 3605 struct ib_uevent_object *obj; 3606 int ret; 3607 3608 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3609 if (ret) 3610 return ret; 3611 3612 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3613 if (IS_ERR(uobj)) 3614 return PTR_ERR(uobj); 3615 3616 obj = container_of(uobj, struct ib_uevent_object, uobject); 3617 memset(&resp, 0, sizeof(resp)); 3618 resp.events_reported = obj->events_reported; 3619 3620 uobj_put_destroy(uobj); 3621 3622 return uverbs_response(attrs, &resp, sizeof(resp)); 3623 } 3624 3625 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3626 { 3627 struct ib_uverbs_ex_query_device_resp resp = {}; 3628 struct ib_uverbs_ex_query_device cmd; 3629 struct ib_device_attr attr = {0}; 3630 struct ib_ucontext *ucontext; 3631 struct ib_device *ib_dev; 3632 int err; 3633 3634 ucontext = ib_uverbs_get_ucontext(attrs); 3635 if (IS_ERR(ucontext)) 3636 return PTR_ERR(ucontext); 3637 ib_dev = ucontext->device; 3638 3639 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3640 if (err) 3641 return err; 3642 3643 if (cmd.comp_mask) 3644 return -EINVAL; 3645 3646 if (cmd.reserved) 3647 return -EINVAL; 3648 3649 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); 3650 if (err) 3651 return err; 3652 3653 copy_query_dev_fields(ucontext, &resp.base, &attr); 3654 3655 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3656 resp.odp_caps.per_transport_caps.rc_odp_caps = 3657 attr.odp_caps.per_transport_caps.rc_odp_caps; 3658 resp.odp_caps.per_transport_caps.uc_odp_caps = 3659 attr.odp_caps.per_transport_caps.uc_odp_caps; 3660 resp.odp_caps.per_transport_caps.ud_odp_caps = 3661 attr.odp_caps.per_transport_caps.ud_odp_caps; 3662 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3663 3664 resp.timestamp_mask = attr.timestamp_mask; 3665 resp.hca_core_clock = attr.hca_core_clock; 3666 resp.device_cap_flags_ex = attr.device_cap_flags; 3667 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3668 resp.rss_caps.max_rwq_indirection_tables = 3669 attr.rss_caps.max_rwq_indirection_tables; 3670 resp.rss_caps.max_rwq_indirection_table_size = 3671 attr.rss_caps.max_rwq_indirection_table_size; 3672 resp.max_wq_type_rq = attr.max_wq_type_rq; 3673 resp.raw_packet_caps = attr.raw_packet_caps; 3674 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3675 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3676 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3677 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3678 resp.tm_caps.flags = attr.tm_caps.flags; 3679 resp.cq_moderation_caps.max_cq_moderation_count = 3680 attr.cq_caps.max_cq_moderation_count; 3681 resp.cq_moderation_caps.max_cq_moderation_period = 3682 attr.cq_caps.max_cq_moderation_period; 3683 resp.max_dm_size = attr.max_dm_size; 3684 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3685 3686 return uverbs_response(attrs, &resp, sizeof(resp)); 3687 } 3688 3689 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3690 { 3691 struct ib_uverbs_ex_modify_cq cmd; 3692 struct ib_cq *cq; 3693 int ret; 3694 3695 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3696 if (ret) 3697 return ret; 3698 3699 if (!cmd.attr_mask || cmd.reserved) 3700 return -EINVAL; 3701 3702 if (cmd.attr_mask > IB_CQ_MODERATE) 3703 return -EOPNOTSUPP; 3704 3705 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3706 if (!cq) 3707 return -EINVAL; 3708 3709 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3710 3711 uobj_put_obj_read(cq); 3712 3713 return ret; 3714 } 3715 3716 /* 3717 * Describe the input structs for write(). Some write methods have an input 3718 * only struct, most have an input and output. If the struct has an output then 3719 * the 'response' u64 must be the first field in the request structure. 3720 * 3721 * If udata is present then both the request and response structs have a 3722 * trailing driver_data flex array. In this case the size of the base struct 3723 * cannot be changed. 3724 */ 3725 #define UAPI_DEF_WRITE_IO(req, resp) \ 3726 .write.has_resp = 1 + \ 3727 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3728 BUILD_BUG_ON_ZERO(sizeof(((req *)0)->response) != \ 3729 sizeof(u64)), \ 3730 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3731 3732 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3733 3734 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3735 UAPI_DEF_WRITE_IO(req, resp), \ 3736 .write.has_udata = \ 3737 1 + \ 3738 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3739 sizeof(req)) + \ 3740 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3741 sizeof(resp)) 3742 3743 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3744 UAPI_DEF_WRITE_I(req), \ 3745 .write.has_udata = \ 3746 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3747 sizeof(req)) 3748 3749 /* 3750 * The _EX versions are for use with WRITE_EX and allow the last struct member 3751 * to be specified. Buffers that do not include that member will be rejected. 3752 */ 3753 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3754 .write.has_resp = 1, \ 3755 .write.req_size = offsetofend(req, req_last_member), \ 3756 .write.resp_size = offsetofend(resp, resp_last_member) 3757 3758 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3759 .write.req_size = offsetofend(req, req_last_member) 3760 3761 const struct uapi_definition uverbs_def_write_intf[] = { 3762 DECLARE_UVERBS_OBJECT( 3763 UVERBS_OBJECT_AH, 3764 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3765 ib_uverbs_create_ah, 3766 UAPI_DEF_WRITE_UDATA_IO( 3767 struct ib_uverbs_create_ah, 3768 struct ib_uverbs_create_ah_resp), 3769 UAPI_DEF_METHOD_NEEDS_FN(create_ah)), 3770 DECLARE_UVERBS_WRITE( 3771 IB_USER_VERBS_CMD_DESTROY_AH, 3772 ib_uverbs_destroy_ah, 3773 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah), 3774 UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))), 3775 3776 DECLARE_UVERBS_OBJECT( 3777 UVERBS_OBJECT_COMP_CHANNEL, 3778 DECLARE_UVERBS_WRITE( 3779 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3780 ib_uverbs_create_comp_channel, 3781 UAPI_DEF_WRITE_IO( 3782 struct ib_uverbs_create_comp_channel, 3783 struct ib_uverbs_create_comp_channel_resp))), 3784 3785 DECLARE_UVERBS_OBJECT( 3786 UVERBS_OBJECT_CQ, 3787 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3788 ib_uverbs_create_cq, 3789 UAPI_DEF_WRITE_UDATA_IO( 3790 struct ib_uverbs_create_cq, 3791 struct ib_uverbs_create_cq_resp), 3792 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3793 DECLARE_UVERBS_WRITE( 3794 IB_USER_VERBS_CMD_DESTROY_CQ, 3795 ib_uverbs_destroy_cq, 3796 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3797 struct ib_uverbs_destroy_cq_resp), 3798 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3799 DECLARE_UVERBS_WRITE( 3800 IB_USER_VERBS_CMD_POLL_CQ, 3801 ib_uverbs_poll_cq, 3802 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3803 struct ib_uverbs_poll_cq_resp), 3804 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3805 DECLARE_UVERBS_WRITE( 3806 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3807 ib_uverbs_req_notify_cq, 3808 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3809 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3810 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3811 ib_uverbs_resize_cq, 3812 UAPI_DEF_WRITE_UDATA_IO( 3813 struct ib_uverbs_resize_cq, 3814 struct ib_uverbs_resize_cq_resp), 3815 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3816 DECLARE_UVERBS_WRITE_EX( 3817 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3818 ib_uverbs_ex_create_cq, 3819 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3820 reserved, 3821 struct ib_uverbs_ex_create_cq_resp, 3822 response_length), 3823 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3824 DECLARE_UVERBS_WRITE_EX( 3825 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3826 ib_uverbs_ex_modify_cq, 3827 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3828 UAPI_DEF_METHOD_NEEDS_FN(create_cq))), 3829 3830 DECLARE_UVERBS_OBJECT( 3831 UVERBS_OBJECT_DEVICE, 3832 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3833 ib_uverbs_get_context, 3834 UAPI_DEF_WRITE_UDATA_IO( 3835 struct ib_uverbs_get_context, 3836 struct ib_uverbs_get_context_resp)), 3837 DECLARE_UVERBS_WRITE( 3838 IB_USER_VERBS_CMD_QUERY_DEVICE, 3839 ib_uverbs_query_device, 3840 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3841 struct ib_uverbs_query_device_resp)), 3842 DECLARE_UVERBS_WRITE( 3843 IB_USER_VERBS_CMD_QUERY_PORT, 3844 ib_uverbs_query_port, 3845 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3846 struct ib_uverbs_query_port_resp), 3847 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3848 DECLARE_UVERBS_WRITE_EX( 3849 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3850 ib_uverbs_ex_query_device, 3851 UAPI_DEF_WRITE_IO_EX( 3852 struct ib_uverbs_ex_query_device, 3853 reserved, 3854 struct ib_uverbs_ex_query_device_resp, 3855 response_length), 3856 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3857 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3858 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3859 3860 DECLARE_UVERBS_OBJECT( 3861 UVERBS_OBJECT_FLOW, 3862 DECLARE_UVERBS_WRITE_EX( 3863 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3864 ib_uverbs_ex_create_flow, 3865 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3866 flow_attr, 3867 struct ib_uverbs_create_flow_resp, 3868 flow_handle), 3869 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3870 DECLARE_UVERBS_WRITE_EX( 3871 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3872 ib_uverbs_ex_destroy_flow, 3873 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3874 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3875 3876 DECLARE_UVERBS_OBJECT( 3877 UVERBS_OBJECT_MR, 3878 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3879 ib_uverbs_dereg_mr, 3880 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3881 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3882 DECLARE_UVERBS_WRITE( 3883 IB_USER_VERBS_CMD_REG_MR, 3884 ib_uverbs_reg_mr, 3885 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3886 struct ib_uverbs_reg_mr_resp), 3887 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3888 DECLARE_UVERBS_WRITE( 3889 IB_USER_VERBS_CMD_REREG_MR, 3890 ib_uverbs_rereg_mr, 3891 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3892 struct ib_uverbs_rereg_mr_resp), 3893 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3894 3895 DECLARE_UVERBS_OBJECT( 3896 UVERBS_OBJECT_MW, 3897 DECLARE_UVERBS_WRITE( 3898 IB_USER_VERBS_CMD_ALLOC_MW, 3899 ib_uverbs_alloc_mw, 3900 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3901 struct ib_uverbs_alloc_mw_resp), 3902 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3903 DECLARE_UVERBS_WRITE( 3904 IB_USER_VERBS_CMD_DEALLOC_MW, 3905 ib_uverbs_dealloc_mw, 3906 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3907 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3908 3909 DECLARE_UVERBS_OBJECT( 3910 UVERBS_OBJECT_PD, 3911 DECLARE_UVERBS_WRITE( 3912 IB_USER_VERBS_CMD_ALLOC_PD, 3913 ib_uverbs_alloc_pd, 3914 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3915 struct ib_uverbs_alloc_pd_resp), 3916 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3917 DECLARE_UVERBS_WRITE( 3918 IB_USER_VERBS_CMD_DEALLOC_PD, 3919 ib_uverbs_dealloc_pd, 3920 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3921 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3922 3923 DECLARE_UVERBS_OBJECT( 3924 UVERBS_OBJECT_QP, 3925 DECLARE_UVERBS_WRITE( 3926 IB_USER_VERBS_CMD_ATTACH_MCAST, 3927 ib_uverbs_attach_mcast, 3928 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3929 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3930 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3931 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3932 ib_uverbs_create_qp, 3933 UAPI_DEF_WRITE_UDATA_IO( 3934 struct ib_uverbs_create_qp, 3935 struct ib_uverbs_create_qp_resp), 3936 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3937 DECLARE_UVERBS_WRITE( 3938 IB_USER_VERBS_CMD_DESTROY_QP, 3939 ib_uverbs_destroy_qp, 3940 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3941 struct ib_uverbs_destroy_qp_resp), 3942 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3943 DECLARE_UVERBS_WRITE( 3944 IB_USER_VERBS_CMD_DETACH_MCAST, 3945 ib_uverbs_detach_mcast, 3946 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3947 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3948 DECLARE_UVERBS_WRITE( 3949 IB_USER_VERBS_CMD_MODIFY_QP, 3950 ib_uverbs_modify_qp, 3951 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3952 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3953 DECLARE_UVERBS_WRITE( 3954 IB_USER_VERBS_CMD_POST_RECV, 3955 ib_uverbs_post_recv, 3956 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3957 struct ib_uverbs_post_recv_resp), 3958 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3959 DECLARE_UVERBS_WRITE( 3960 IB_USER_VERBS_CMD_POST_SEND, 3961 ib_uverbs_post_send, 3962 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3963 struct ib_uverbs_post_send_resp), 3964 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3965 DECLARE_UVERBS_WRITE( 3966 IB_USER_VERBS_CMD_QUERY_QP, 3967 ib_uverbs_query_qp, 3968 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3969 struct ib_uverbs_query_qp_resp), 3970 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3971 DECLARE_UVERBS_WRITE_EX( 3972 IB_USER_VERBS_EX_CMD_CREATE_QP, 3973 ib_uverbs_ex_create_qp, 3974 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3975 comp_mask, 3976 struct ib_uverbs_ex_create_qp_resp, 3977 response_length), 3978 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3979 DECLARE_UVERBS_WRITE_EX( 3980 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3981 ib_uverbs_ex_modify_qp, 3982 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3983 base, 3984 struct ib_uverbs_ex_modify_qp_resp, 3985 response_length), 3986 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3987 3988 DECLARE_UVERBS_OBJECT( 3989 UVERBS_OBJECT_RWQ_IND_TBL, 3990 DECLARE_UVERBS_WRITE_EX( 3991 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3992 ib_uverbs_ex_create_rwq_ind_table, 3993 UAPI_DEF_WRITE_IO_EX( 3994 struct ib_uverbs_ex_create_rwq_ind_table, 3995 log_ind_tbl_size, 3996 struct ib_uverbs_ex_create_rwq_ind_table_resp, 3997 ind_tbl_num), 3998 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 3999 DECLARE_UVERBS_WRITE_EX( 4000 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 4001 ib_uverbs_ex_destroy_rwq_ind_table, 4002 UAPI_DEF_WRITE_I( 4003 struct ib_uverbs_ex_destroy_rwq_ind_table), 4004 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 4005 4006 DECLARE_UVERBS_OBJECT( 4007 UVERBS_OBJECT_WQ, 4008 DECLARE_UVERBS_WRITE_EX( 4009 IB_USER_VERBS_EX_CMD_CREATE_WQ, 4010 ib_uverbs_ex_create_wq, 4011 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 4012 max_sge, 4013 struct ib_uverbs_ex_create_wq_resp, 4014 wqn), 4015 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 4016 DECLARE_UVERBS_WRITE_EX( 4017 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 4018 ib_uverbs_ex_destroy_wq, 4019 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 4020 wq_handle, 4021 struct ib_uverbs_ex_destroy_wq_resp, 4022 reserved), 4023 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 4024 DECLARE_UVERBS_WRITE_EX( 4025 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 4026 ib_uverbs_ex_modify_wq, 4027 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 4028 curr_wq_state), 4029 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 4030 4031 DECLARE_UVERBS_OBJECT( 4032 UVERBS_OBJECT_SRQ, 4033 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 4034 ib_uverbs_create_srq, 4035 UAPI_DEF_WRITE_UDATA_IO( 4036 struct ib_uverbs_create_srq, 4037 struct ib_uverbs_create_srq_resp), 4038 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4039 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 4040 ib_uverbs_create_xsrq, 4041 UAPI_DEF_WRITE_UDATA_IO( 4042 struct ib_uverbs_create_xsrq, 4043 struct ib_uverbs_create_srq_resp), 4044 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4045 DECLARE_UVERBS_WRITE( 4046 IB_USER_VERBS_CMD_DESTROY_SRQ, 4047 ib_uverbs_destroy_srq, 4048 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4049 struct ib_uverbs_destroy_srq_resp), 4050 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4051 DECLARE_UVERBS_WRITE( 4052 IB_USER_VERBS_CMD_MODIFY_SRQ, 4053 ib_uverbs_modify_srq, 4054 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4055 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4056 DECLARE_UVERBS_WRITE( 4057 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4058 ib_uverbs_post_srq_recv, 4059 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4060 struct ib_uverbs_post_srq_recv_resp), 4061 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4062 DECLARE_UVERBS_WRITE( 4063 IB_USER_VERBS_CMD_QUERY_SRQ, 4064 ib_uverbs_query_srq, 4065 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4066 struct ib_uverbs_query_srq_resp), 4067 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4068 4069 DECLARE_UVERBS_OBJECT( 4070 UVERBS_OBJECT_XRCD, 4071 DECLARE_UVERBS_WRITE( 4072 IB_USER_VERBS_CMD_CLOSE_XRCD, 4073 ib_uverbs_close_xrcd, 4074 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd), 4075 UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)), 4076 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4077 ib_uverbs_open_qp, 4078 UAPI_DEF_WRITE_UDATA_IO( 4079 struct ib_uverbs_open_qp, 4080 struct ib_uverbs_create_qp_resp)), 4081 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4082 ib_uverbs_open_xrcd, 4083 UAPI_DEF_WRITE_UDATA_IO( 4084 struct ib_uverbs_open_xrcd, 4085 struct ib_uverbs_open_xrcd_resp), 4086 UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))), 4087 4088 {}, 4089 }; 4090