1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2005 Topspin Communications. All rights reserved. 5 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved. 6 * Copyright (c) 2005 PathScale, Inc. All rights reserved. 7 * Copyright (c) 2006 Mellanox Technologies. All rights reserved. 8 * 9 * This software is available to you under a choice of one of two 10 * licenses. You may choose to be licensed under the terms of the GNU 11 * General Public License (GPL) Version 2, available from the file 12 * COPYING in the main directory of this source tree, or the 13 * OpenIB.org BSD license below: 14 * 15 * Redistribution and use in source and binary forms, with or 16 * without modification, are permitted provided that the following 17 * conditions are met: 18 * 19 * - Redistributions of source code must retain the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer. 22 * 23 * - Redistributions in binary form must reproduce the above 24 * copyright notice, this list of conditions and the following 25 * disclaimer in the documentation and/or other materials 26 * provided with the distribution. 27 * 28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 29 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 31 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 32 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 33 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 34 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 35 * SOFTWARE. 36 */ 37 38 #include <sys/cdefs.h> 39 #define LINUXKPI_PARAM_PREFIX ibcore_ 40 41 #include <sys/priv.h> 42 43 #include <linux/file.h> 44 #include <linux/fs.h> 45 #include <linux/slab.h> 46 #include <linux/sched.h> 47 48 #include <linux/uaccess.h> 49 50 #include <rdma/uverbs_types.h> 51 #include <rdma/uverbs_std_types.h> 52 #include "rdma_core.h" 53 54 #include "uverbs.h" 55 #include "core_priv.h" 56 57 /* 58 * Copy a response to userspace. If the provided 'resp' is larger than the 59 * user buffer it is silently truncated. If the user provided a larger buffer 60 * then the trailing portion is zero filled. 61 * 62 * These semantics are intended to support future extension of the output 63 * structures. 64 */ 65 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp, 66 size_t resp_len) 67 { 68 int ret; 69 70 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 71 return uverbs_copy_to_struct_or_zero( 72 attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len); 73 74 if (copy_to_user(attrs->ucore.outbuf, resp, 75 min(attrs->ucore.outlen, resp_len))) 76 return -EFAULT; 77 78 if (resp_len < attrs->ucore.outlen) { 79 /* 80 * Zero fill any extra memory that user 81 * space might have provided. 82 */ 83 ret = clear_user(attrs->ucore.outbuf + resp_len, 84 attrs->ucore.outlen - resp_len); 85 if (ret) 86 return -EFAULT; 87 } 88 89 return 0; 90 } 91 92 /* 93 * Copy a request from userspace. If the provided 'req' is larger than the 94 * user buffer then the user buffer is zero extended into the 'req'. If 'req' 95 * is smaller than the user buffer then the uncopied bytes in the user buffer 96 * must be zero. 97 */ 98 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req, 99 size_t req_len) 100 { 101 if (copy_from_user(req, attrs->ucore.inbuf, 102 min(attrs->ucore.inlen, req_len))) 103 return -EFAULT; 104 105 if (attrs->ucore.inlen < req_len) { 106 memset((u8 *)req + attrs->ucore.inlen, 0, 107 req_len - attrs->ucore.inlen); 108 } else if (attrs->ucore.inlen > req_len) { 109 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len, 110 attrs->ucore.inlen - req_len)) 111 return -EOPNOTSUPP; 112 } 113 return 0; 114 } 115 116 /* 117 * Generate the value for the 'response_length' protocol used by write_ex. 118 * This is the number of bytes the kernel actually wrote. Userspace can use 119 * this to detect what structure members in the response the kernel 120 * understood. 121 */ 122 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs, 123 size_t resp_len) 124 { 125 return min_t(size_t, attrs->ucore.outlen, resp_len); 126 } 127 128 /* 129 * The iterator version of the request interface is for handlers that need to 130 * step over a flex array at the end of a command header. 131 */ 132 struct uverbs_req_iter { 133 const u8 __user *cur; 134 const u8 __user *end; 135 }; 136 137 static int uverbs_request_start(struct uverbs_attr_bundle *attrs, 138 struct uverbs_req_iter *iter, 139 void *req, 140 size_t req_len) 141 { 142 if (attrs->ucore.inlen < req_len) 143 return -ENOSPC; 144 145 if (copy_from_user(req, attrs->ucore.inbuf, req_len)) 146 return -EFAULT; 147 148 iter->cur = attrs->ucore.inbuf + req_len; 149 iter->end = attrs->ucore.inbuf + attrs->ucore.inlen; 150 return 0; 151 } 152 153 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val, 154 size_t len) 155 { 156 if (iter->cur + len > iter->end) 157 return -ENOSPC; 158 159 if (copy_from_user(val, iter->cur, len)) 160 return -EFAULT; 161 162 iter->cur += len; 163 return 0; 164 } 165 166 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter, 167 size_t len) 168 { 169 const void __user *res = iter->cur; 170 171 if (iter->cur + len > iter->end) 172 return (void __force __user *)ERR_PTR(-ENOSPC); 173 iter->cur += len; 174 return res; 175 } 176 177 static int uverbs_request_finish(struct uverbs_req_iter *iter) 178 { 179 if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur)) 180 return -EOPNOTSUPP; 181 return 0; 182 } 183 184 /* 185 * When calling a destroy function during an error unwind we need to pass in 186 * the udata that is sanitized of all user arguments. Ie from the driver 187 * perspective it looks like no udata was passed. 188 */ 189 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs) 190 { 191 attrs->driver_udata = (struct ib_udata){}; 192 return &attrs->driver_udata; 193 } 194 195 static struct ib_uverbs_completion_event_file * 196 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs) 197 { 198 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL, 199 fd, attrs); 200 201 if (IS_ERR(uobj)) 202 return (void *)uobj; 203 204 uverbs_uobject_get(uobj); 205 uobj_put_read(uobj); 206 207 return container_of(uobj, struct ib_uverbs_completion_event_file, 208 uobj); 209 } 210 #define ib_uverbs_lookup_comp_file(_fd, _ufile) ({ \ 211 CTASSERT(sizeof(_fd) == sizeof(s32)); \ 212 _ib_uverbs_lookup_comp_file(_fd, _ufile); \ 213 }) 214 215 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs) 216 { 217 struct ib_uverbs_file *ufile = attrs->ufile; 218 struct ib_ucontext *ucontext; 219 struct ib_device *ib_dev; 220 221 ib_dev = srcu_dereference(ufile->device->ib_dev, 222 &ufile->device->disassociate_srcu); 223 if (!ib_dev) 224 return -EIO; 225 226 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext); 227 if (!ucontext) 228 return -ENOMEM; 229 230 ucontext->device = ib_dev; 231 ucontext->ufile = ufile; 232 xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC); 233 attrs->context = ucontext; 234 return 0; 235 } 236 237 int ib_init_ucontext(struct uverbs_attr_bundle *attrs) 238 { 239 struct ib_ucontext *ucontext = attrs->context; 240 struct ib_uverbs_file *file = attrs->ufile; 241 int ret; 242 243 if (!down_read_trylock(&file->hw_destroy_rwsem)) 244 return -EIO; 245 mutex_lock(&file->ucontext_lock); 246 if (file->ucontext) { 247 ret = -EINVAL; 248 goto err; 249 } 250 251 ret = ucontext->device->alloc_ucontext(ucontext, 252 &attrs->driver_udata); 253 if (ret) 254 goto err_uncharge; 255 256 /* 257 * Make sure that ib_uverbs_get_ucontext() sees the pointer update 258 * only after all writes to setup the ucontext have completed 259 */ 260 atomic_store_rel_ptr((uintptr_t *)&file->ucontext, (uintptr_t)ucontext); 261 262 mutex_unlock(&file->ucontext_lock); 263 up_read(&file->hw_destroy_rwsem); 264 return 0; 265 266 err_uncharge: 267 err: 268 mutex_unlock(&file->ucontext_lock); 269 up_read(&file->hw_destroy_rwsem); 270 return ret; 271 } 272 273 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs) 274 { 275 struct ib_uverbs_get_context_resp resp; 276 struct ib_uverbs_get_context cmd; 277 struct ib_device *ib_dev; 278 struct ib_uobject *uobj; 279 int ret; 280 281 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 282 if (ret) 283 return ret; 284 285 ret = ib_alloc_ucontext(attrs); 286 if (ret) 287 return ret; 288 289 uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev); 290 if (IS_ERR(uobj)) { 291 ret = PTR_ERR(uobj); 292 goto err_ucontext; 293 } 294 295 resp = (struct ib_uverbs_get_context_resp){ 296 .num_comp_vectors = attrs->ufile->device->num_comp_vectors, 297 .async_fd = uobj->id, 298 }; 299 ret = uverbs_response(attrs, &resp, sizeof(resp)); 300 if (ret) 301 goto err_uobj; 302 303 ret = ib_init_ucontext(attrs); 304 if (ret) 305 goto err_uobj; 306 307 ib_uverbs_init_async_event_file( 308 container_of(uobj, struct ib_uverbs_async_event_file, uobj)); 309 rdma_alloc_commit_uobject(uobj, attrs); 310 return 0; 311 312 err_uobj: 313 rdma_alloc_abort_uobject(uobj, attrs); 314 err_ucontext: 315 kfree(attrs->context); 316 attrs->context = NULL; 317 return ret; 318 } 319 320 static void copy_query_dev_fields(struct ib_ucontext *ucontext, 321 struct ib_uverbs_query_device_resp *resp, 322 struct ib_device_attr *attr) 323 { 324 struct ib_device *ib_dev = ucontext->device; 325 326 resp->fw_ver = attr->fw_ver; 327 resp->node_guid = ib_dev->node_guid; 328 resp->sys_image_guid = attr->sys_image_guid; 329 resp->max_mr_size = attr->max_mr_size; 330 resp->page_size_cap = attr->page_size_cap; 331 resp->vendor_id = attr->vendor_id; 332 resp->vendor_part_id = attr->vendor_part_id; 333 resp->hw_ver = attr->hw_ver; 334 resp->max_qp = attr->max_qp; 335 resp->max_qp_wr = attr->max_qp_wr; 336 resp->device_cap_flags = (u32)attr->device_cap_flags; 337 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge); 338 resp->max_sge_rd = attr->max_sge_rd; 339 resp->max_cq = attr->max_cq; 340 resp->max_cqe = attr->max_cqe; 341 resp->max_mr = attr->max_mr; 342 resp->max_pd = attr->max_pd; 343 resp->max_qp_rd_atom = attr->max_qp_rd_atom; 344 resp->max_ee_rd_atom = attr->max_ee_rd_atom; 345 resp->max_res_rd_atom = attr->max_res_rd_atom; 346 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom; 347 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom; 348 resp->atomic_cap = attr->atomic_cap; 349 resp->max_ee = attr->max_ee; 350 resp->max_rdd = attr->max_rdd; 351 resp->max_mw = attr->max_mw; 352 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp; 353 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp; 354 resp->max_mcast_grp = attr->max_mcast_grp; 355 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach; 356 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach; 357 resp->max_ah = attr->max_ah; 358 resp->max_fmr = attr->max_fmr; 359 resp->max_map_per_fmr = attr->max_map_per_fmr; 360 resp->max_srq = attr->max_srq; 361 resp->max_srq_wr = attr->max_srq_wr; 362 resp->max_srq_sge = attr->max_srq_sge; 363 resp->max_pkeys = attr->max_pkeys; 364 resp->local_ca_ack_delay = attr->local_ca_ack_delay; 365 resp->phys_port_cnt = ib_dev->phys_port_cnt; 366 } 367 368 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs) 369 { 370 struct ib_uverbs_query_device cmd; 371 struct ib_uverbs_query_device_resp resp; 372 struct ib_ucontext *ucontext; 373 int ret; 374 375 ucontext = ib_uverbs_get_ucontext(attrs); 376 if (IS_ERR(ucontext)) 377 return PTR_ERR(ucontext); 378 379 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 380 if (ret) 381 return ret; 382 383 memset(&resp, 0, sizeof resp); 384 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs); 385 386 return uverbs_response(attrs, &resp, sizeof(resp)); 387 } 388 389 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs) 390 { 391 struct ib_uverbs_query_port cmd; 392 struct ib_uverbs_query_port_resp resp; 393 struct ib_port_attr attr; 394 int ret; 395 struct ib_ucontext *ucontext; 396 struct ib_device *ib_dev; 397 398 ucontext = ib_uverbs_get_ucontext(attrs); 399 if (IS_ERR(ucontext)) 400 return PTR_ERR(ucontext); 401 ib_dev = ucontext->device; 402 403 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 404 if (ret) 405 return ret; 406 407 ret = ib_query_port(ib_dev, cmd.port_num, &attr); 408 if (ret) 409 return ret; 410 411 memset(&resp, 0, sizeof resp); 412 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num); 413 414 return uverbs_response(attrs, &resp, sizeof(resp)); 415 } 416 417 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs) 418 { 419 struct ib_uverbs_alloc_pd cmd; 420 struct ib_uverbs_alloc_pd_resp resp; 421 struct ib_uobject *uobj; 422 struct ib_pd *pd; 423 int ret; 424 struct ib_device *ib_dev; 425 426 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 427 if (ret) 428 return ret; 429 430 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev); 431 if (IS_ERR(uobj)) 432 return PTR_ERR(uobj); 433 434 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd); 435 if (!pd) { 436 ret = -ENOMEM; 437 goto err; 438 } 439 440 pd->device = ib_dev; 441 pd->uobject = uobj; 442 pd->__internal_mr = NULL; 443 atomic_set(&pd->usecnt, 0); 444 445 ret = ib_dev->alloc_pd(pd, &attrs->driver_udata); 446 if (ret) 447 goto err_alloc; 448 449 uobj->object = pd; 450 memset(&resp, 0, sizeof resp); 451 resp.pd_handle = uobj->id; 452 453 ret = uverbs_response(attrs, &resp, sizeof(resp)); 454 if (ret) 455 goto err_copy; 456 457 rdma_alloc_commit_uobject(uobj, attrs); 458 return 0; 459 460 err_copy: 461 ib_dealloc_pd_user(pd, uverbs_get_cleared_udata(attrs)); 462 pd = NULL; 463 err_alloc: 464 kfree(pd); 465 err: 466 uobj_alloc_abort(uobj, attrs); 467 return ret; 468 } 469 470 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs) 471 { 472 struct ib_uverbs_dealloc_pd cmd; 473 int ret; 474 475 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 476 if (ret) 477 return ret; 478 479 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 480 } 481 482 struct xrcd_table_entry { 483 struct rb_node node; 484 struct ib_xrcd *xrcd; 485 struct vnode *vnode; 486 }; 487 488 static int xrcd_table_insert(struct ib_uverbs_device *dev, 489 struct vnode *vnode, 490 struct ib_xrcd *xrcd) 491 { 492 struct xrcd_table_entry *entry, *scan; 493 struct rb_node **p = &dev->xrcd_tree.rb_node; 494 struct rb_node *parent = NULL; 495 496 entry = kmalloc(sizeof *entry, GFP_KERNEL); 497 if (!entry) 498 return -ENOMEM; 499 500 entry->xrcd = xrcd; 501 entry->vnode = vnode; 502 503 while (*p) { 504 parent = *p; 505 scan = rb_entry(parent, struct xrcd_table_entry, node); 506 507 if ((uintptr_t)vnode < (uintptr_t)scan->vnode) { 508 p = &(*p)->rb_left; 509 } else if ((uintptr_t)vnode > (uintptr_t)scan->vnode) { 510 p = &(*p)->rb_right; 511 } else { 512 kfree(entry); 513 return -EEXIST; 514 } 515 } 516 517 rb_link_node(&entry->node, parent, p); 518 rb_insert_color(&entry->node, &dev->xrcd_tree); 519 vrefact(vnode); 520 return 0; 521 } 522 523 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, 524 struct vnode *vnode) 525 { 526 struct xrcd_table_entry *entry; 527 struct rb_node *p = dev->xrcd_tree.rb_node; 528 529 while (p) { 530 entry = rb_entry(p, struct xrcd_table_entry, node); 531 532 if ((uintptr_t)vnode < (uintptr_t)entry->vnode) 533 p = p->rb_left; 534 else if ((uintptr_t)vnode > (uintptr_t)entry->vnode) 535 p = p->rb_right; 536 else 537 return entry; 538 } 539 540 return NULL; 541 } 542 543 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct vnode *vnode) 544 { 545 struct xrcd_table_entry *entry; 546 547 entry = xrcd_table_search(dev, vnode); 548 if (!entry) 549 return NULL; 550 551 return entry->xrcd; 552 } 553 554 static void xrcd_table_delete(struct ib_uverbs_device *dev, 555 struct vnode *vnode) 556 { 557 struct xrcd_table_entry *entry; 558 559 entry = xrcd_table_search(dev, vnode); 560 if (entry) { 561 vrele(vnode); 562 rb_erase(&entry->node, &dev->xrcd_tree); 563 kfree(entry); 564 } 565 } 566 567 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs) 568 { 569 struct ib_uverbs_device *ibudev = attrs->ufile->device; 570 struct ib_uverbs_open_xrcd cmd; 571 struct ib_uverbs_open_xrcd_resp resp; 572 struct ib_uxrcd_object *obj; 573 struct ib_xrcd *xrcd = NULL; 574 struct vnode *vnode = NULL; 575 int ret = 0; 576 int new_xrcd = 0; 577 struct ib_device *ib_dev; 578 579 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 580 if (ret) 581 return ret; 582 583 mutex_lock(&ibudev->xrcd_tree_mutex); 584 585 if (cmd.fd != -1) { 586 /* search for file descriptor */ 587 ret = -fgetvp(curthread, cmd.fd, &cap_no_rights, &vnode); 588 if (ret != 0) 589 goto err_tree_mutex_unlock; 590 591 xrcd = find_xrcd(ibudev, vnode); 592 if (!xrcd && !(cmd.oflags & O_CREAT)) { 593 /* no file descriptor. Need CREATE flag */ 594 ret = -EAGAIN; 595 goto err_tree_mutex_unlock; 596 } 597 598 if (xrcd && cmd.oflags & O_EXCL) { 599 ret = -EINVAL; 600 goto err_tree_mutex_unlock; 601 } 602 } 603 604 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs, 605 &ib_dev); 606 if (IS_ERR(obj)) { 607 ret = PTR_ERR(obj); 608 goto err_tree_mutex_unlock; 609 } 610 611 if (!xrcd) { 612 xrcd = ib_dev->alloc_xrcd(ib_dev, &attrs->driver_udata); 613 if (IS_ERR(xrcd)) { 614 ret = PTR_ERR(xrcd); 615 goto err; 616 } 617 618 xrcd->vnode = vnode; 619 xrcd->device = ib_dev; 620 atomic_set(&xrcd->usecnt, 0); 621 mutex_init(&xrcd->tgt_qp_mutex); 622 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 623 new_xrcd = 1; 624 } 625 626 atomic_set(&obj->refcnt, 0); 627 obj->uobject.object = xrcd; 628 memset(&resp, 0, sizeof resp); 629 resp.xrcd_handle = obj->uobject.id; 630 631 if (vnode != NULL) { 632 if (new_xrcd) { 633 /* create new vnode/xrcd table entry */ 634 ret = xrcd_table_insert(ibudev, vnode, xrcd); 635 if (ret) 636 goto err_dealloc_xrcd; 637 } 638 atomic_inc(&xrcd->usecnt); 639 } 640 641 ret = uverbs_response(attrs, &resp, sizeof(resp)); 642 if (ret) 643 goto err_copy; 644 645 if (vnode != NULL) 646 vrele(vnode); 647 648 mutex_unlock(&ibudev->xrcd_tree_mutex); 649 650 rdma_alloc_commit_uobject(&obj->uobject, attrs); 651 return 0; 652 653 err_copy: 654 if (vnode != NULL) { 655 if (new_xrcd) 656 xrcd_table_delete(ibudev, vnode); 657 atomic_dec(&xrcd->usecnt); 658 } 659 660 err_dealloc_xrcd: 661 ib_dealloc_xrcd(xrcd, uverbs_get_cleared_udata(attrs)); 662 663 err: 664 uobj_alloc_abort(&obj->uobject, attrs); 665 666 err_tree_mutex_unlock: 667 if (vnode != NULL) 668 vrele(vnode); 669 670 mutex_unlock(&ibudev->xrcd_tree_mutex); 671 672 return ret; 673 } 674 675 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) 676 { 677 struct ib_uverbs_close_xrcd cmd; 678 int ret; 679 680 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 681 if (ret) 682 return ret; 683 684 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); 685 } 686 687 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, 688 enum rdma_remove_reason why, 689 struct uverbs_attr_bundle *attrs) 690 { 691 struct vnode *vnode; 692 int ret; 693 struct ib_uverbs_device *dev = attrs->ufile->device; 694 695 vnode = xrcd->vnode; 696 if (vnode && !atomic_dec_and_test(&xrcd->usecnt)) 697 return 0; 698 699 ret = ib_dealloc_xrcd(xrcd, &attrs->driver_udata); 700 701 if (ib_is_destroy_retryable(ret, why, uobject)) { 702 atomic_inc(&xrcd->usecnt); 703 return ret; 704 } 705 706 if (vnode) 707 xrcd_table_delete(dev, vnode); 708 709 return ret; 710 } 711 712 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) 713 { 714 struct ib_uverbs_reg_mr cmd; 715 struct ib_uverbs_reg_mr_resp resp; 716 struct ib_uobject *uobj; 717 struct ib_pd *pd; 718 struct ib_mr *mr; 719 int ret; 720 struct ib_device *ib_dev; 721 722 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 723 if (ret) 724 return ret; 725 726 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) 727 return -EINVAL; 728 729 ret = ib_check_mr_access(cmd.access_flags); 730 if (ret) 731 return ret; 732 733 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); 734 if (IS_ERR(uobj)) 735 return PTR_ERR(uobj); 736 737 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 738 if (!pd) { 739 ret = -EINVAL; 740 goto err_free; 741 } 742 743 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) { 744 if (!(pd->device->attrs.device_cap_flags & 745 IB_DEVICE_ON_DEMAND_PAGING)) { 746 pr_debug("ODP support not available\n"); 747 ret = -EINVAL; 748 goto err_put; 749 } 750 } 751 752 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, 753 cmd.access_flags, 754 &attrs->driver_udata); 755 if (IS_ERR(mr)) { 756 ret = PTR_ERR(mr); 757 goto err_put; 758 } 759 760 mr->device = pd->device; 761 mr->pd = pd; 762 mr->type = IB_MR_TYPE_USER; 763 mr->dm = NULL; 764 mr->sig_attrs = NULL; 765 mr->uobject = uobj; 766 atomic_inc(&pd->usecnt); 767 768 uobj->object = mr; 769 770 memset(&resp, 0, sizeof resp); 771 resp.lkey = mr->lkey; 772 resp.rkey = mr->rkey; 773 resp.mr_handle = uobj->id; 774 775 ret = uverbs_response(attrs, &resp, sizeof(resp)); 776 if (ret) 777 goto err_copy; 778 779 uobj_put_obj_read(pd); 780 781 rdma_alloc_commit_uobject(uobj, attrs); 782 return 0; 783 784 err_copy: 785 ib_dereg_mr_user(mr, uverbs_get_cleared_udata(attrs)); 786 787 err_put: 788 uobj_put_obj_read(pd); 789 790 err_free: 791 uobj_alloc_abort(uobj, attrs); 792 return ret; 793 } 794 795 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) 796 { 797 struct ib_uverbs_rereg_mr cmd; 798 struct ib_uverbs_rereg_mr_resp resp; 799 struct ib_pd *pd = NULL; 800 struct ib_mr *mr; 801 struct ib_pd *old_pd; 802 int ret; 803 struct ib_uobject *uobj; 804 805 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 806 if (ret) 807 return ret; 808 809 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) 810 return -EINVAL; 811 812 if ((cmd.flags & IB_MR_REREG_TRANS) && 813 (!cmd.start || !cmd.hca_va || 0 >= cmd.length || 814 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) 815 return -EINVAL; 816 817 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 818 if (IS_ERR(uobj)) 819 return PTR_ERR(uobj); 820 821 mr = uobj->object; 822 823 if (mr->dm) { 824 ret = -EINVAL; 825 goto put_uobjs; 826 } 827 828 if (cmd.flags & IB_MR_REREG_ACCESS) { 829 ret = ib_check_mr_access(cmd.access_flags); 830 if (ret) 831 goto put_uobjs; 832 } 833 834 if (cmd.flags & IB_MR_REREG_PD) { 835 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, 836 attrs); 837 if (!pd) { 838 ret = -EINVAL; 839 goto put_uobjs; 840 } 841 } 842 843 old_pd = mr->pd; 844 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start, 845 cmd.length, cmd.hca_va, 846 cmd.access_flags, pd, 847 &attrs->driver_udata); 848 if (ret) 849 goto put_uobj_pd; 850 851 if (cmd.flags & IB_MR_REREG_PD) { 852 atomic_inc(&pd->usecnt); 853 mr->pd = pd; 854 atomic_dec(&old_pd->usecnt); 855 } 856 857 memset(&resp, 0, sizeof(resp)); 858 resp.lkey = mr->lkey; 859 resp.rkey = mr->rkey; 860 861 ret = uverbs_response(attrs, &resp, sizeof(resp)); 862 863 put_uobj_pd: 864 if (cmd.flags & IB_MR_REREG_PD) 865 uobj_put_obj_read(pd); 866 867 put_uobjs: 868 uobj_put_write(uobj); 869 870 return ret; 871 } 872 873 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) 874 { 875 struct ib_uverbs_dereg_mr cmd; 876 int ret; 877 878 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 879 if (ret) 880 return ret; 881 882 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); 883 } 884 885 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) 886 { 887 struct ib_uverbs_alloc_mw cmd; 888 struct ib_uverbs_alloc_mw_resp resp; 889 struct ib_uobject *uobj; 890 struct ib_pd *pd; 891 struct ib_mw *mw; 892 int ret; 893 struct ib_device *ib_dev; 894 895 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 896 if (ret) 897 return ret; 898 899 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); 900 if (IS_ERR(uobj)) 901 return PTR_ERR(uobj); 902 903 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 904 if (!pd) { 905 ret = -EINVAL; 906 goto err_free; 907 } 908 909 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { 910 ret = -EINVAL; 911 goto err_put; 912 } 913 914 mw = pd->device->alloc_mw(pd, cmd.mw_type, &attrs->driver_udata); 915 if (IS_ERR(mw)) { 916 ret = PTR_ERR(mw); 917 goto err_put; 918 } 919 920 mw->device = pd->device; 921 mw->pd = pd; 922 mw->uobject = uobj; 923 atomic_inc(&pd->usecnt); 924 925 uobj->object = mw; 926 927 memset(&resp, 0, sizeof(resp)); 928 resp.rkey = mw->rkey; 929 resp.mw_handle = uobj->id; 930 931 ret = uverbs_response(attrs, &resp, sizeof(resp)); 932 if (ret) 933 goto err_copy; 934 935 uobj_put_obj_read(pd); 936 rdma_alloc_commit_uobject(uobj, attrs); 937 return 0; 938 939 err_copy: 940 uverbs_dealloc_mw(mw); 941 err_put: 942 uobj_put_obj_read(pd); 943 err_free: 944 uobj_alloc_abort(uobj, attrs); 945 return ret; 946 } 947 948 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) 949 { 950 struct ib_uverbs_dealloc_mw cmd; 951 int ret; 952 953 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 954 if (ret) 955 return ret; 956 957 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); 958 } 959 960 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) 961 { 962 struct ib_uverbs_create_comp_channel cmd; 963 struct ib_uverbs_create_comp_channel_resp resp; 964 struct ib_uobject *uobj; 965 struct ib_uverbs_completion_event_file *ev_file; 966 struct ib_device *ib_dev; 967 int ret; 968 969 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 970 if (ret) 971 return ret; 972 973 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); 974 if (IS_ERR(uobj)) 975 return PTR_ERR(uobj); 976 977 resp.fd = uobj->id; 978 979 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, 980 uobj); 981 ib_uverbs_init_event_queue(&ev_file->ev_queue); 982 983 ret = uverbs_response(attrs, &resp, sizeof(resp)); 984 if (ret) { 985 uobj_alloc_abort(uobj, attrs); 986 return ret; 987 } 988 989 rdma_alloc_commit_uobject(uobj, attrs); 990 return 0; 991 } 992 993 static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs, 994 struct ib_uverbs_ex_create_cq *cmd) 995 { 996 struct ib_ucq_object *obj; 997 struct ib_uverbs_completion_event_file *ev_file = NULL; 998 struct ib_cq *cq; 999 int ret; 1000 struct ib_uverbs_ex_create_cq_resp resp; 1001 struct ib_cq_init_attr attr = {}; 1002 struct ib_device *ib_dev; 1003 1004 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) 1005 return ERR_PTR(-EINVAL); 1006 1007 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, 1008 &ib_dev); 1009 if (IS_ERR(obj)) 1010 return obj; 1011 1012 if (cmd->comp_channel >= 0) { 1013 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); 1014 if (IS_ERR(ev_file)) { 1015 ret = PTR_ERR(ev_file); 1016 goto err; 1017 } 1018 } 1019 1020 obj->uevent.uobject.user_handle = cmd->user_handle; 1021 INIT_LIST_HEAD(&obj->comp_list); 1022 INIT_LIST_HEAD(&obj->uevent.event_list); 1023 1024 attr.cqe = cmd->cqe; 1025 attr.comp_vector = cmd->comp_vector; 1026 attr.flags = cmd->flags; 1027 1028 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 1029 if (!cq) { 1030 ret = -ENOMEM; 1031 goto err_file; 1032 } 1033 cq->device = ib_dev; 1034 cq->uobject = obj; 1035 cq->comp_handler = ib_uverbs_comp_handler; 1036 cq->event_handler = ib_uverbs_cq_event_handler; 1037 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 1038 atomic_set(&cq->usecnt, 0); 1039 1040 ret = ib_dev->create_cq(cq, &attr, &attrs->driver_udata); 1041 if (ret) 1042 goto err_free; 1043 1044 obj->uevent.uobject.object = cq; 1045 memset(&resp, 0, sizeof resp); 1046 resp.base.cq_handle = obj->uevent.uobject.id; 1047 resp.base.cqe = cq->cqe; 1048 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1049 1050 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1051 if (ret) 1052 goto err_cb; 1053 1054 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 1055 return obj; 1056 1057 err_cb: 1058 ib_destroy_cq_user(cq, uverbs_get_cleared_udata(attrs)); 1059 cq = NULL; 1060 err_free: 1061 kfree(cq); 1062 err_file: 1063 if (ev_file) 1064 ib_uverbs_release_ucq(ev_file, obj); 1065 1066 err: 1067 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1068 1069 return ERR_PTR(ret); 1070 } 1071 1072 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) 1073 { 1074 struct ib_uverbs_create_cq cmd; 1075 struct ib_uverbs_ex_create_cq cmd_ex; 1076 struct ib_ucq_object *obj; 1077 int ret; 1078 1079 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1080 if (ret) 1081 return ret; 1082 1083 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1084 cmd_ex.user_handle = cmd.user_handle; 1085 cmd_ex.cqe = cmd.cqe; 1086 cmd_ex.comp_vector = cmd.comp_vector; 1087 cmd_ex.comp_channel = cmd.comp_channel; 1088 1089 obj = create_cq(attrs, &cmd_ex); 1090 return PTR_ERR_OR_ZERO(obj); 1091 } 1092 1093 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) 1094 { 1095 struct ib_uverbs_ex_create_cq cmd; 1096 struct ib_ucq_object *obj; 1097 int ret; 1098 1099 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1100 if (ret) 1101 return ret; 1102 1103 if (cmd.comp_mask) 1104 return -EINVAL; 1105 1106 if (cmd.reserved) 1107 return -EINVAL; 1108 1109 obj = create_cq(attrs, &cmd); 1110 return PTR_ERR_OR_ZERO(obj); 1111 } 1112 1113 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) 1114 { 1115 struct ib_uverbs_resize_cq cmd; 1116 struct ib_uverbs_resize_cq_resp resp = {}; 1117 struct ib_cq *cq; 1118 int ret = -EINVAL; 1119 1120 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1121 if (ret) 1122 return ret; 1123 1124 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1125 if (!cq) 1126 return -EINVAL; 1127 1128 ret = cq->device->resize_cq(cq, cmd.cqe, &attrs->driver_udata); 1129 if (ret) 1130 goto out; 1131 1132 resp.cqe = cq->cqe; 1133 1134 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1135 out: 1136 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1137 UVERBS_LOOKUP_READ); 1138 1139 return ret; 1140 } 1141 1142 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest, 1143 struct ib_wc *wc) 1144 { 1145 struct ib_uverbs_wc tmp; 1146 1147 tmp.wr_id = wc->wr_id; 1148 tmp.status = wc->status; 1149 tmp.opcode = wc->opcode; 1150 tmp.vendor_err = wc->vendor_err; 1151 tmp.byte_len = wc->byte_len; 1152 tmp.ex.imm_data = wc->ex.imm_data; 1153 tmp.qp_num = wc->qp->qp_num; 1154 tmp.src_qp = wc->src_qp; 1155 tmp.wc_flags = wc->wc_flags; 1156 tmp.pkey_index = wc->pkey_index; 1157 tmp.slid = wc->slid; 1158 tmp.sl = wc->sl; 1159 tmp.dlid_path_bits = wc->dlid_path_bits; 1160 tmp.port_num = wc->port_num; 1161 tmp.reserved = 0; 1162 1163 if (copy_to_user(dest, &tmp, sizeof tmp)) 1164 return -EFAULT; 1165 1166 return 0; 1167 } 1168 1169 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) 1170 { 1171 struct ib_uverbs_poll_cq cmd; 1172 struct ib_uverbs_poll_cq_resp resp; 1173 u8 __user *header_ptr; 1174 u8 __user *data_ptr; 1175 struct ib_cq *cq; 1176 struct ib_wc wc; 1177 int ret; 1178 1179 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1180 if (ret) 1181 return ret; 1182 1183 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1184 if (!cq) 1185 return -EINVAL; 1186 1187 /* we copy a struct ib_uverbs_poll_cq_resp to user space */ 1188 header_ptr = attrs->ucore.outbuf; 1189 data_ptr = header_ptr + sizeof resp; 1190 1191 memset(&resp, 0, sizeof resp); 1192 while (resp.count < cmd.ne) { 1193 ret = ib_poll_cq(cq, 1, &wc); 1194 if (ret < 0) 1195 goto out_put; 1196 if (!ret) 1197 break; 1198 1199 ret = copy_wc_to_user(cq->device, data_ptr, &wc); 1200 if (ret) 1201 goto out_put; 1202 1203 data_ptr += sizeof(struct ib_uverbs_wc); 1204 ++resp.count; 1205 } 1206 1207 if (copy_to_user(header_ptr, &resp, sizeof resp)) { 1208 ret = -EFAULT; 1209 goto out_put; 1210 } 1211 ret = 0; 1212 1213 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) 1214 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); 1215 1216 out_put: 1217 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1218 UVERBS_LOOKUP_READ); 1219 return ret; 1220 } 1221 1222 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) 1223 { 1224 struct ib_uverbs_req_notify_cq cmd; 1225 struct ib_cq *cq; 1226 int ret; 1227 1228 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1229 if (ret) 1230 return ret; 1231 1232 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1233 if (!cq) 1234 return -EINVAL; 1235 1236 ib_req_notify_cq(cq, cmd.solicited_only ? 1237 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); 1238 1239 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 1240 UVERBS_LOOKUP_READ); 1241 return 0; 1242 } 1243 1244 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) 1245 { 1246 struct ib_uverbs_destroy_cq cmd; 1247 struct ib_uverbs_destroy_cq_resp resp; 1248 struct ib_uobject *uobj; 1249 struct ib_ucq_object *obj; 1250 int ret; 1251 1252 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1253 if (ret) 1254 return ret; 1255 1256 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 1257 if (IS_ERR(uobj)) 1258 return PTR_ERR(uobj); 1259 1260 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject); 1261 memset(&resp, 0, sizeof(resp)); 1262 resp.comp_events_reported = obj->comp_events_reported; 1263 resp.async_events_reported = obj->uevent.events_reported; 1264 1265 uobj_put_destroy(uobj); 1266 1267 return uverbs_response(attrs, &resp, sizeof(resp)); 1268 } 1269 1270 static int create_qp(struct uverbs_attr_bundle *attrs, 1271 struct ib_uverbs_ex_create_qp *cmd) 1272 { 1273 struct ib_uqp_object *obj; 1274 struct ib_device *device; 1275 struct ib_pd *pd = NULL; 1276 struct ib_xrcd *xrcd = NULL; 1277 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); 1278 struct ib_cq *scq = NULL, *rcq = NULL; 1279 struct ib_srq *srq = NULL; 1280 struct ib_qp *qp; 1281 struct ib_qp_init_attr attr = {}; 1282 struct ib_uverbs_ex_create_qp_resp resp; 1283 int ret; 1284 struct ib_rwq_ind_table *ind_tbl = NULL; 1285 bool has_sq = true; 1286 struct ib_device *ib_dev; 1287 1288 if (cmd->qp_type == IB_QPT_RAW_PACKET && priv_check(curthread, PRIV_NET_RAW) != 0) 1289 return -EPERM; 1290 1291 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1292 &ib_dev); 1293 if (IS_ERR(obj)) 1294 return PTR_ERR(obj); 1295 obj->uxrcd = NULL; 1296 obj->uevent.uobject.user_handle = cmd->user_handle; 1297 mutex_init(&obj->mcast_lock); 1298 1299 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { 1300 ind_tbl = uobj_get_obj_read(rwq_ind_table, 1301 UVERBS_OBJECT_RWQ_IND_TBL, 1302 cmd->rwq_ind_tbl_handle, attrs); 1303 if (!ind_tbl) { 1304 ret = -EINVAL; 1305 goto err_put; 1306 } 1307 1308 attr.rwq_ind_tbl = ind_tbl; 1309 } 1310 1311 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { 1312 ret = -EINVAL; 1313 goto err_put; 1314 } 1315 1316 if (ind_tbl && !cmd->max_send_wr) 1317 has_sq = false; 1318 1319 if (cmd->qp_type == IB_QPT_XRC_TGT) { 1320 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, 1321 attrs); 1322 1323 if (IS_ERR(xrcd_uobj)) { 1324 ret = -EINVAL; 1325 goto err_put; 1326 } 1327 1328 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1329 if (!xrcd) { 1330 ret = -EINVAL; 1331 goto err_put; 1332 } 1333 device = xrcd->device; 1334 } else { 1335 if (cmd->qp_type == IB_QPT_XRC_INI) { 1336 cmd->max_recv_wr = 0; 1337 cmd->max_recv_sge = 0; 1338 } else { 1339 if (cmd->is_srq) { 1340 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, 1341 cmd->srq_handle, attrs); 1342 if (!srq || srq->srq_type == IB_SRQT_XRC) { 1343 ret = -EINVAL; 1344 goto err_put; 1345 } 1346 } 1347 1348 if (!ind_tbl) { 1349 if (cmd->recv_cq_handle != cmd->send_cq_handle) { 1350 rcq = uobj_get_obj_read( 1351 cq, UVERBS_OBJECT_CQ, 1352 cmd->recv_cq_handle, attrs); 1353 if (!rcq) { 1354 ret = -EINVAL; 1355 goto err_put; 1356 } 1357 } 1358 } 1359 } 1360 1361 if (has_sq) 1362 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 1363 cmd->send_cq_handle, attrs); 1364 if (!ind_tbl) 1365 rcq = rcq ?: scq; 1366 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, 1367 attrs); 1368 if (!pd || (!scq && has_sq)) { 1369 ret = -EINVAL; 1370 goto err_put; 1371 } 1372 1373 device = pd->device; 1374 } 1375 1376 attr.event_handler = ib_uverbs_qp_event_handler; 1377 attr.send_cq = scq; 1378 attr.recv_cq = rcq; 1379 attr.srq = srq; 1380 attr.xrcd = xrcd; 1381 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR : 1382 IB_SIGNAL_REQ_WR; 1383 attr.qp_type = cmd->qp_type; 1384 attr.create_flags = 0; 1385 1386 attr.cap.max_send_wr = cmd->max_send_wr; 1387 attr.cap.max_recv_wr = cmd->max_recv_wr; 1388 attr.cap.max_send_sge = cmd->max_send_sge; 1389 attr.cap.max_recv_sge = cmd->max_recv_sge; 1390 attr.cap.max_inline_data = cmd->max_inline_data; 1391 1392 INIT_LIST_HEAD(&obj->uevent.event_list); 1393 INIT_LIST_HEAD(&obj->mcast_list); 1394 1395 attr.create_flags = cmd->create_flags; 1396 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | 1397 IB_QP_CREATE_CROSS_CHANNEL | 1398 IB_QP_CREATE_MANAGED_SEND | 1399 IB_QP_CREATE_MANAGED_RECV | 1400 IB_QP_CREATE_SCATTER_FCS | 1401 IB_QP_CREATE_CVLAN_STRIPPING | 1402 IB_QP_CREATE_SOURCE_QPN | 1403 IB_QP_CREATE_PCI_WRITE_END_PADDING)) { 1404 ret = -EINVAL; 1405 goto err_put; 1406 } 1407 1408 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { 1409 if (priv_check(curthread, PRIV_NET_RAW)) { 1410 ret = -EPERM; 1411 goto err_put; 1412 } 1413 1414 attr.source_qpn = cmd->source_qpn; 1415 } 1416 1417 if (cmd->qp_type == IB_QPT_XRC_TGT) 1418 qp = ib_create_qp(pd, &attr); 1419 else 1420 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata, 1421 obj); 1422 1423 if (IS_ERR(qp)) { 1424 ret = PTR_ERR(qp); 1425 goto err_put; 1426 } 1427 1428 if (cmd->qp_type != IB_QPT_XRC_TGT) { 1429 atomic_inc(&pd->usecnt); 1430 if (attr.send_cq) 1431 atomic_inc(&attr.send_cq->usecnt); 1432 if (attr.recv_cq) 1433 atomic_inc(&attr.recv_cq->usecnt); 1434 if (attr.srq) 1435 atomic_inc(&attr.srq->usecnt); 1436 if (ind_tbl) 1437 atomic_inc(&ind_tbl->usecnt); 1438 } else { 1439 /* It is done in _ib_create_qp for other QP types */ 1440 qp->uobject = obj; 1441 } 1442 1443 obj->uevent.uobject.object = qp; 1444 1445 memset(&resp, 0, sizeof resp); 1446 resp.base.qpn = qp->qp_num; 1447 resp.base.qp_handle = obj->uevent.uobject.id; 1448 resp.base.max_recv_sge = attr.cap.max_recv_sge; 1449 resp.base.max_send_sge = attr.cap.max_send_sge; 1450 resp.base.max_recv_wr = attr.cap.max_recv_wr; 1451 resp.base.max_send_wr = attr.cap.max_send_wr; 1452 resp.base.max_inline_data = attr.cap.max_inline_data; 1453 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 1454 1455 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1456 if (ret) 1457 goto err_cb; 1458 1459 if (xrcd) { 1460 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, 1461 uobject); 1462 atomic_inc(&obj->uxrcd->refcnt); 1463 uobj_put_read(xrcd_uobj); 1464 } 1465 1466 if (pd) 1467 uobj_put_obj_read(pd); 1468 if (scq) 1469 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1470 UVERBS_LOOKUP_READ); 1471 if (rcq && rcq != scq) 1472 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1473 UVERBS_LOOKUP_READ); 1474 if (srq) 1475 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1476 UVERBS_LOOKUP_READ); 1477 if (ind_tbl) 1478 uobj_put_obj_read(ind_tbl); 1479 1480 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 1481 return 0; 1482 err_cb: 1483 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs)); 1484 1485 err_put: 1486 if (!IS_ERR(xrcd_uobj)) 1487 uobj_put_read(xrcd_uobj); 1488 if (pd) 1489 uobj_put_obj_read(pd); 1490 if (scq) 1491 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, 1492 UVERBS_LOOKUP_READ); 1493 if (rcq && rcq != scq) 1494 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, 1495 UVERBS_LOOKUP_READ); 1496 if (srq) 1497 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 1498 UVERBS_LOOKUP_READ); 1499 if (ind_tbl) 1500 uobj_put_obj_read(ind_tbl); 1501 1502 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1503 return ret; 1504 } 1505 1506 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) 1507 { 1508 struct ib_uverbs_create_qp cmd; 1509 struct ib_uverbs_ex_create_qp cmd_ex; 1510 int ret; 1511 1512 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1513 if (ret) 1514 return ret; 1515 1516 memset(&cmd_ex, 0, sizeof(cmd_ex)); 1517 cmd_ex.user_handle = cmd.user_handle; 1518 cmd_ex.pd_handle = cmd.pd_handle; 1519 cmd_ex.send_cq_handle = cmd.send_cq_handle; 1520 cmd_ex.recv_cq_handle = cmd.recv_cq_handle; 1521 cmd_ex.srq_handle = cmd.srq_handle; 1522 cmd_ex.max_send_wr = cmd.max_send_wr; 1523 cmd_ex.max_recv_wr = cmd.max_recv_wr; 1524 cmd_ex.max_send_sge = cmd.max_send_sge; 1525 cmd_ex.max_recv_sge = cmd.max_recv_sge; 1526 cmd_ex.max_inline_data = cmd.max_inline_data; 1527 cmd_ex.sq_sig_all = cmd.sq_sig_all; 1528 cmd_ex.qp_type = cmd.qp_type; 1529 cmd_ex.is_srq = cmd.is_srq; 1530 1531 return create_qp(attrs, &cmd_ex); 1532 } 1533 1534 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) 1535 { 1536 struct ib_uverbs_ex_create_qp cmd; 1537 int ret; 1538 1539 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1540 if (ret) 1541 return ret; 1542 1543 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) 1544 return -EINVAL; 1545 1546 if (cmd.reserved) 1547 return -EINVAL; 1548 1549 return create_qp(attrs, &cmd); 1550 } 1551 1552 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) 1553 { 1554 struct ib_uverbs_open_qp cmd; 1555 struct ib_uverbs_create_qp_resp resp; 1556 struct ib_uqp_object *obj; 1557 struct ib_xrcd *xrcd; 1558 struct ib_uobject *uninitialized_var(xrcd_uobj); 1559 struct ib_qp *qp; 1560 struct ib_qp_open_attr attr = {}; 1561 int ret; 1562 struct ib_device *ib_dev; 1563 1564 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1565 if (ret) 1566 return ret; 1567 1568 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, 1569 &ib_dev); 1570 if (IS_ERR(obj)) 1571 return PTR_ERR(obj); 1572 1573 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); 1574 if (IS_ERR(xrcd_uobj)) { 1575 ret = -EINVAL; 1576 goto err_put; 1577 } 1578 1579 xrcd = (struct ib_xrcd *)xrcd_uobj->object; 1580 if (!xrcd) { 1581 ret = -EINVAL; 1582 goto err_xrcd; 1583 } 1584 1585 attr.event_handler = ib_uverbs_qp_event_handler; 1586 attr.qp_num = cmd.qpn; 1587 attr.qp_type = cmd.qp_type; 1588 1589 INIT_LIST_HEAD(&obj->uevent.event_list); 1590 INIT_LIST_HEAD(&obj->mcast_list); 1591 1592 qp = ib_open_qp(xrcd, &attr); 1593 if (IS_ERR(qp)) { 1594 ret = PTR_ERR(qp); 1595 goto err_xrcd; 1596 } 1597 1598 obj->uevent.uobject.object = qp; 1599 obj->uevent.uobject.user_handle = cmd.user_handle; 1600 1601 memset(&resp, 0, sizeof resp); 1602 resp.qpn = qp->qp_num; 1603 resp.qp_handle = obj->uevent.uobject.id; 1604 1605 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1606 if (ret) 1607 goto err_destroy; 1608 1609 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 1610 atomic_inc(&obj->uxrcd->refcnt); 1611 qp->uobject = obj; 1612 uobj_put_read(xrcd_uobj); 1613 1614 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 1615 return 0; 1616 1617 err_destroy: 1618 ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs)); 1619 err_xrcd: 1620 uobj_put_read(xrcd_uobj); 1621 err_put: 1622 uobj_alloc_abort(&obj->uevent.uobject, attrs); 1623 return ret; 1624 } 1625 1626 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, 1627 struct ib_ah_attr *rdma_attr) 1628 { 1629 uverb_attr->dlid = rdma_attr->dlid; 1630 uverb_attr->sl = rdma_attr->sl; 1631 uverb_attr->src_path_bits = rdma_attr->src_path_bits; 1632 uverb_attr->static_rate = rdma_attr->static_rate; 1633 uverb_attr->is_global = !!(rdma_attr->ah_flags & IB_AH_GRH); 1634 if (uverb_attr->is_global) { 1635 const struct ib_global_route *grh = &rdma_attr->grh; 1636 1637 memcpy(uverb_attr->dgid, grh->dgid.raw, 16); 1638 uverb_attr->flow_label = grh->flow_label; 1639 uverb_attr->sgid_index = grh->sgid_index; 1640 uverb_attr->hop_limit = grh->hop_limit; 1641 uverb_attr->traffic_class = grh->traffic_class; 1642 } 1643 uverb_attr->port_num = rdma_attr->port_num; 1644 } 1645 1646 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) 1647 { 1648 struct ib_uverbs_query_qp cmd; 1649 struct ib_uverbs_query_qp_resp resp; 1650 struct ib_qp *qp; 1651 struct ib_qp_attr *attr; 1652 struct ib_qp_init_attr *init_attr; 1653 int ret; 1654 1655 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1656 if (ret) 1657 return ret; 1658 1659 attr = kmalloc(sizeof *attr, GFP_KERNEL); 1660 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); 1661 if (!attr || !init_attr) { 1662 ret = -ENOMEM; 1663 goto out; 1664 } 1665 1666 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1667 if (!qp) { 1668 ret = -EINVAL; 1669 goto out; 1670 } 1671 1672 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); 1673 1674 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1675 UVERBS_LOOKUP_READ); 1676 1677 if (ret) 1678 goto out; 1679 1680 memset(&resp, 0, sizeof resp); 1681 1682 resp.qp_state = attr->qp_state; 1683 resp.cur_qp_state = attr->cur_qp_state; 1684 resp.path_mtu = attr->path_mtu; 1685 resp.path_mig_state = attr->path_mig_state; 1686 resp.qkey = attr->qkey; 1687 resp.rq_psn = attr->rq_psn; 1688 resp.sq_psn = attr->sq_psn; 1689 resp.dest_qp_num = attr->dest_qp_num; 1690 resp.qp_access_flags = attr->qp_access_flags; 1691 resp.pkey_index = attr->pkey_index; 1692 resp.alt_pkey_index = attr->alt_pkey_index; 1693 resp.sq_draining = attr->sq_draining; 1694 resp.max_rd_atomic = attr->max_rd_atomic; 1695 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; 1696 resp.min_rnr_timer = attr->min_rnr_timer; 1697 resp.port_num = attr->port_num; 1698 resp.timeout = attr->timeout; 1699 resp.retry_cnt = attr->retry_cnt; 1700 resp.rnr_retry = attr->rnr_retry; 1701 resp.alt_port_num = attr->alt_port_num; 1702 resp.alt_timeout = attr->alt_timeout; 1703 1704 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); 1705 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); 1706 1707 resp.max_send_wr = init_attr->cap.max_send_wr; 1708 resp.max_recv_wr = init_attr->cap.max_recv_wr; 1709 resp.max_send_sge = init_attr->cap.max_send_sge; 1710 resp.max_recv_sge = init_attr->cap.max_recv_sge; 1711 resp.max_inline_data = init_attr->cap.max_inline_data; 1712 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; 1713 1714 ret = uverbs_response(attrs, &resp, sizeof(resp)); 1715 1716 out: 1717 kfree(attr); 1718 kfree(init_attr); 1719 1720 return ret; 1721 } 1722 1723 /* Remove ignored fields set in the attribute mask */ 1724 static int modify_qp_mask(enum ib_qp_type qp_type, int mask) 1725 { 1726 switch (qp_type) { 1727 case IB_QPT_XRC_INI: 1728 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); 1729 case IB_QPT_XRC_TGT: 1730 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | 1731 IB_QP_RNR_RETRY); 1732 default: 1733 return mask; 1734 } 1735 } 1736 1737 static void copy_ah_attr_from_uverbs(struct ib_device *dev, 1738 struct ib_ah_attr *rdma_attr, 1739 struct ib_uverbs_qp_dest *uverb_attr) 1740 { 1741 if (uverb_attr->is_global) { 1742 struct ib_global_route *grh = &rdma_attr->grh; 1743 1744 grh->flow_label = uverb_attr->flow_label; 1745 grh->sgid_index = uverb_attr->sgid_index; 1746 grh->hop_limit = uverb_attr->hop_limit; 1747 grh->traffic_class = uverb_attr->traffic_class; 1748 memcpy(grh->dgid.raw, uverb_attr->dgid, sizeof(grh->dgid)); 1749 rdma_attr->ah_flags = IB_AH_GRH; 1750 } else { 1751 rdma_attr->ah_flags = 0; 1752 } 1753 rdma_attr->dlid = uverb_attr->dlid; 1754 rdma_attr->sl = uverb_attr->sl; 1755 rdma_attr->src_path_bits = uverb_attr->src_path_bits; 1756 rdma_attr->static_rate = uverb_attr->static_rate; 1757 rdma_attr->port_num = uverb_attr->port_num; 1758 } 1759 1760 static int modify_qp(struct uverbs_attr_bundle *attrs, 1761 struct ib_uverbs_ex_modify_qp *cmd) 1762 { 1763 struct ib_qp_attr *attr; 1764 struct ib_qp *qp; 1765 int ret; 1766 1767 attr = kzalloc(sizeof(*attr), GFP_KERNEL); 1768 if (!attr) 1769 return -ENOMEM; 1770 1771 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, 1772 attrs); 1773 if (!qp) { 1774 ret = -EINVAL; 1775 goto out; 1776 } 1777 1778 if ((cmd->base.attr_mask & IB_QP_PORT) && 1779 !rdma_is_port_valid(qp->device, cmd->base.port_num)) { 1780 ret = -EINVAL; 1781 goto release_qp; 1782 } 1783 1784 if ((cmd->base.attr_mask & IB_QP_AV)) { 1785 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { 1786 ret = -EINVAL; 1787 goto release_qp; 1788 } 1789 1790 if (cmd->base.attr_mask & IB_QP_STATE && 1791 cmd->base.qp_state == IB_QPS_RTR) { 1792 /* We are in INIT->RTR TRANSITION (if we are not, 1793 * this transition will be rejected in subsequent checks). 1794 * In the INIT->RTR transition, we cannot have IB_QP_PORT set, 1795 * but the IB_QP_STATE flag is required. 1796 * 1797 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, 1798 * when IB_QP_AV is set, has required inclusion of a valid 1799 * port number in the primary AV. (AVs are created and handled 1800 * differently for infiniband and ethernet (RoCE) ports). 1801 * 1802 * Check the port number included in the primary AV against 1803 * the port number in the qp struct, which was set (and saved) 1804 * in the RST->INIT transition. 1805 */ 1806 if (cmd->base.dest.port_num != qp->real_qp->port) { 1807 ret = -EINVAL; 1808 goto release_qp; 1809 } 1810 } else { 1811 /* We are in SQD->SQD. (If we are not, this transition will 1812 * be rejected later in the verbs layer checks). 1813 * Check for both IB_QP_PORT and IB_QP_AV, these can be set 1814 * together in the SQD->SQD transition. 1815 * 1816 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the 1817 * verbs layer driver does not track primary port changes 1818 * resulting from path migration. Thus, in SQD, if the primary 1819 * AV is modified, the primary port should also be modified). 1820 * 1821 * Note that in this transition, the IB_QP_STATE flag 1822 * is not allowed. 1823 */ 1824 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1825 == (IB_QP_AV | IB_QP_PORT)) && 1826 cmd->base.port_num != cmd->base.dest.port_num) { 1827 ret = -EINVAL; 1828 goto release_qp; 1829 } 1830 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) 1831 == IB_QP_AV) { 1832 cmd->base.attr_mask |= IB_QP_PORT; 1833 cmd->base.port_num = cmd->base.dest.port_num; 1834 } 1835 } 1836 } 1837 1838 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && 1839 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || 1840 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || 1841 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { 1842 ret = -EINVAL; 1843 goto release_qp; 1844 } 1845 1846 if ((cmd->base.attr_mask & IB_QP_CUR_STATE && 1847 cmd->base.cur_qp_state > IB_QPS_ERR) || 1848 (cmd->base.attr_mask & IB_QP_STATE && 1849 cmd->base.qp_state > IB_QPS_ERR)) { 1850 ret = -EINVAL; 1851 goto release_qp; 1852 } 1853 1854 if (cmd->base.attr_mask & IB_QP_STATE) 1855 attr->qp_state = cmd->base.qp_state; 1856 if (cmd->base.attr_mask & IB_QP_CUR_STATE) 1857 attr->cur_qp_state = cmd->base.cur_qp_state; 1858 if (cmd->base.attr_mask & IB_QP_PATH_MTU) 1859 attr->path_mtu = cmd->base.path_mtu; 1860 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) 1861 attr->path_mig_state = cmd->base.path_mig_state; 1862 if (cmd->base.attr_mask & IB_QP_QKEY) 1863 attr->qkey = cmd->base.qkey; 1864 if (cmd->base.attr_mask & IB_QP_RQ_PSN) 1865 attr->rq_psn = cmd->base.rq_psn; 1866 if (cmd->base.attr_mask & IB_QP_SQ_PSN) 1867 attr->sq_psn = cmd->base.sq_psn; 1868 if (cmd->base.attr_mask & IB_QP_DEST_QPN) 1869 attr->dest_qp_num = cmd->base.dest_qp_num; 1870 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) 1871 attr->qp_access_flags = cmd->base.qp_access_flags; 1872 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) 1873 attr->pkey_index = cmd->base.pkey_index; 1874 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 1875 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; 1876 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) 1877 attr->max_rd_atomic = cmd->base.max_rd_atomic; 1878 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) 1879 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; 1880 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) 1881 attr->min_rnr_timer = cmd->base.min_rnr_timer; 1882 if (cmd->base.attr_mask & IB_QP_PORT) 1883 attr->port_num = cmd->base.port_num; 1884 if (cmd->base.attr_mask & IB_QP_TIMEOUT) 1885 attr->timeout = cmd->base.timeout; 1886 if (cmd->base.attr_mask & IB_QP_RETRY_CNT) 1887 attr->retry_cnt = cmd->base.retry_cnt; 1888 if (cmd->base.attr_mask & IB_QP_RNR_RETRY) 1889 attr->rnr_retry = cmd->base.rnr_retry; 1890 if (cmd->base.attr_mask & IB_QP_ALT_PATH) { 1891 attr->alt_port_num = cmd->base.alt_port_num; 1892 attr->alt_timeout = cmd->base.alt_timeout; 1893 attr->alt_pkey_index = cmd->base.alt_pkey_index; 1894 } 1895 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) 1896 attr->rate_limit = cmd->rate_limit; 1897 1898 if (cmd->base.attr_mask & IB_QP_AV) 1899 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, 1900 &cmd->base.dest); 1901 1902 if (cmd->base.attr_mask & IB_QP_ALT_PATH) 1903 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, 1904 &cmd->base.alt_dest); 1905 1906 ret = ib_modify_qp_with_udata(qp, attr, 1907 modify_qp_mask(qp->qp_type, 1908 cmd->base.attr_mask), 1909 &attrs->driver_udata); 1910 1911 release_qp: 1912 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 1913 UVERBS_LOOKUP_READ); 1914 out: 1915 kfree(attr); 1916 1917 return ret; 1918 } 1919 1920 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) 1921 { 1922 struct ib_uverbs_ex_modify_qp cmd; 1923 int ret; 1924 1925 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); 1926 if (ret) 1927 return ret; 1928 1929 if (cmd.base.attr_mask & 1930 ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1)) 1931 return -EOPNOTSUPP; 1932 1933 return modify_qp(attrs, &cmd); 1934 } 1935 1936 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) 1937 { 1938 struct ib_uverbs_ex_modify_qp cmd; 1939 struct ib_uverbs_ex_modify_qp_resp resp = { 1940 .response_length = uverbs_response_length(attrs, sizeof(resp)) 1941 }; 1942 int ret; 1943 1944 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1945 if (ret) 1946 return ret; 1947 1948 /* 1949 * Last bit is reserved for extending the attr_mask by 1950 * using another field. 1951 */ 1952 BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31)); 1953 1954 if (cmd.base.attr_mask & 1955 ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1)) 1956 return -EOPNOTSUPP; 1957 1958 ret = modify_qp(attrs, &cmd); 1959 if (ret) 1960 return ret; 1961 1962 return uverbs_response(attrs, &resp, sizeof(resp)); 1963 } 1964 1965 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) 1966 { 1967 struct ib_uverbs_destroy_qp cmd; 1968 struct ib_uverbs_destroy_qp_resp resp; 1969 struct ib_uobject *uobj; 1970 struct ib_uqp_object *obj; 1971 int ret; 1972 1973 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 1974 if (ret) 1975 return ret; 1976 1977 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 1978 if (IS_ERR(uobj)) 1979 return PTR_ERR(uobj); 1980 1981 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); 1982 memset(&resp, 0, sizeof(resp)); 1983 resp.events_reported = obj->uevent.events_reported; 1984 1985 uobj_put_destroy(uobj); 1986 1987 return uverbs_response(attrs, &resp, sizeof(resp)); 1988 } 1989 1990 static void *alloc_wr(size_t wr_size, __u32 num_sge) 1991 { 1992 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) / 1993 sizeof (struct ib_sge)) 1994 return NULL; 1995 1996 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) + 1997 num_sge * sizeof (struct ib_sge), GFP_KERNEL); 1998 } 1999 2000 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) 2001 { 2002 struct ib_uverbs_post_send cmd; 2003 struct ib_uverbs_post_send_resp resp; 2004 struct ib_uverbs_send_wr *user_wr; 2005 struct ib_send_wr *wr = NULL, *last, *next; 2006 const struct ib_send_wr *bad_wr; 2007 struct ib_qp *qp; 2008 int i, sg_ind; 2009 int is_ud; 2010 int ret, ret2; 2011 size_t next_size; 2012 const struct ib_sge __user *sgls; 2013 const void __user *wqes; 2014 struct uverbs_req_iter iter; 2015 2016 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2017 if (ret) 2018 return ret; 2019 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count); 2020 if (IS_ERR(wqes)) 2021 return PTR_ERR(wqes); 2022 sgls = uverbs_request_next_ptr( 2023 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge)); 2024 if (IS_ERR(sgls)) 2025 return PTR_ERR(sgls); 2026 ret = uverbs_request_finish(&iter); 2027 if (ret) 2028 return ret; 2029 2030 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); 2031 if (!user_wr) 2032 return -ENOMEM; 2033 2034 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2035 if (!qp) { 2036 ret = -EINVAL; 2037 goto out; 2038 } 2039 2040 is_ud = qp->qp_type == IB_QPT_UD; 2041 sg_ind = 0; 2042 last = NULL; 2043 for (i = 0; i < cmd.wr_count; ++i) { 2044 if (copy_from_user(user_wr, (const u8 *)wqes + i * cmd.wqe_size, 2045 cmd.wqe_size)) { 2046 ret = -EFAULT; 2047 goto out_put; 2048 } 2049 2050 if (user_wr->num_sge + sg_ind > cmd.sge_count) { 2051 ret = -EINVAL; 2052 goto out_put; 2053 } 2054 2055 if (is_ud) { 2056 struct ib_ud_wr *ud; 2057 2058 if (user_wr->opcode != IB_WR_SEND && 2059 user_wr->opcode != IB_WR_SEND_WITH_IMM) { 2060 ret = -EINVAL; 2061 goto out_put; 2062 } 2063 2064 next_size = sizeof(*ud); 2065 ud = alloc_wr(next_size, user_wr->num_sge); 2066 if (!ud) { 2067 ret = -ENOMEM; 2068 goto out_put; 2069 } 2070 2071 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, 2072 user_wr->wr.ud.ah, attrs); 2073 if (!ud->ah) { 2074 kfree(ud); 2075 ret = -EINVAL; 2076 goto out_put; 2077 } 2078 ud->remote_qpn = user_wr->wr.ud.remote_qpn; 2079 ud->remote_qkey = user_wr->wr.ud.remote_qkey; 2080 2081 next = &ud->wr; 2082 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || 2083 user_wr->opcode == IB_WR_RDMA_WRITE || 2084 user_wr->opcode == IB_WR_RDMA_READ) { 2085 struct ib_rdma_wr *rdma; 2086 2087 next_size = sizeof(*rdma); 2088 rdma = alloc_wr(next_size, user_wr->num_sge); 2089 if (!rdma) { 2090 ret = -ENOMEM; 2091 goto out_put; 2092 } 2093 2094 rdma->remote_addr = user_wr->wr.rdma.remote_addr; 2095 rdma->rkey = user_wr->wr.rdma.rkey; 2096 2097 next = &rdma->wr; 2098 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || 2099 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { 2100 struct ib_atomic_wr *atomic; 2101 2102 next_size = sizeof(*atomic); 2103 atomic = alloc_wr(next_size, user_wr->num_sge); 2104 if (!atomic) { 2105 ret = -ENOMEM; 2106 goto out_put; 2107 } 2108 2109 atomic->remote_addr = user_wr->wr.atomic.remote_addr; 2110 atomic->compare_add = user_wr->wr.atomic.compare_add; 2111 atomic->swap = user_wr->wr.atomic.swap; 2112 atomic->rkey = user_wr->wr.atomic.rkey; 2113 2114 next = &atomic->wr; 2115 } else if (user_wr->opcode == IB_WR_SEND || 2116 user_wr->opcode == IB_WR_SEND_WITH_IMM || 2117 user_wr->opcode == IB_WR_SEND_WITH_INV) { 2118 next_size = sizeof(*next); 2119 next = alloc_wr(next_size, user_wr->num_sge); 2120 if (!next) { 2121 ret = -ENOMEM; 2122 goto out_put; 2123 } 2124 } else { 2125 ret = -EINVAL; 2126 goto out_put; 2127 } 2128 2129 if (user_wr->opcode == IB_WR_SEND_WITH_IMM || 2130 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { 2131 next->ex.imm_data = 2132 (__be32 __force) user_wr->ex.imm_data; 2133 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { 2134 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; 2135 } 2136 2137 if (!last) 2138 wr = next; 2139 else 2140 last->next = next; 2141 last = next; 2142 2143 next->next = NULL; 2144 next->wr_id = user_wr->wr_id; 2145 next->num_sge = user_wr->num_sge; 2146 next->opcode = user_wr->opcode; 2147 next->send_flags = user_wr->send_flags; 2148 2149 if (next->num_sge) { 2150 next->sg_list = (void *)((char *)next + 2151 ALIGN(next_size, sizeof(struct ib_sge))); 2152 if (copy_from_user(next->sg_list, sgls + sg_ind, 2153 next->num_sge * 2154 sizeof(struct ib_sge))) { 2155 ret = -EFAULT; 2156 goto out_put; 2157 } 2158 sg_ind += next->num_sge; 2159 } else 2160 next->sg_list = NULL; 2161 } 2162 2163 resp.bad_wr = 0; 2164 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr); 2165 if (ret) 2166 for (next = wr; next; next = next->next) { 2167 ++resp.bad_wr; 2168 if (next == bad_wr) 2169 break; 2170 } 2171 2172 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2173 if (ret2) 2174 ret = ret2; 2175 2176 out_put: 2177 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2178 UVERBS_LOOKUP_READ); 2179 2180 while (wr) { 2181 if (is_ud && ud_wr(wr)->ah) 2182 uobj_put_obj_read(ud_wr(wr)->ah); 2183 next = wr->next; 2184 kfree(wr); 2185 wr = next; 2186 } 2187 2188 out: 2189 kfree(user_wr); 2190 2191 return ret; 2192 } 2193 2194 static struct ib_recv_wr * 2195 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, 2196 u32 wqe_size, u32 sge_count) 2197 { 2198 struct ib_uverbs_recv_wr *user_wr; 2199 struct ib_recv_wr *wr = NULL, *last, *next; 2200 int sg_ind; 2201 int i; 2202 int ret; 2203 const struct ib_sge __user *sgls; 2204 const void __user *wqes; 2205 2206 if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) 2207 return ERR_PTR(-EINVAL); 2208 2209 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count); 2210 if (IS_ERR(wqes)) 2211 return ERR_CAST(wqes); 2212 sgls = uverbs_request_next_ptr( 2213 iter, sge_count * sizeof(struct ib_uverbs_sge)); 2214 if (IS_ERR(sgls)) 2215 return ERR_CAST(sgls); 2216 ret = uverbs_request_finish(iter); 2217 if (ret) 2218 return ERR_PTR(ret); 2219 2220 user_wr = kmalloc(wqe_size, GFP_KERNEL); 2221 if (!user_wr) 2222 return ERR_PTR(-ENOMEM); 2223 2224 sg_ind = 0; 2225 last = NULL; 2226 for (i = 0; i < wr_count; ++i) { 2227 if (copy_from_user(user_wr, (const char *)wqes + i * wqe_size, 2228 wqe_size)) { 2229 ret = -EFAULT; 2230 goto err; 2231 } 2232 2233 if (user_wr->num_sge + sg_ind > sge_count) { 2234 ret = -EINVAL; 2235 goto err; 2236 } 2237 2238 if (user_wr->num_sge >= 2239 (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) / 2240 sizeof (struct ib_sge)) { 2241 ret = -EINVAL; 2242 goto err; 2243 } 2244 2245 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + 2246 user_wr->num_sge * sizeof (struct ib_sge), 2247 GFP_KERNEL); 2248 if (!next) { 2249 ret = -ENOMEM; 2250 goto err; 2251 } 2252 2253 if (!last) 2254 wr = next; 2255 else 2256 last->next = next; 2257 last = next; 2258 2259 next->next = NULL; 2260 next->wr_id = user_wr->wr_id; 2261 next->num_sge = user_wr->num_sge; 2262 2263 if (next->num_sge) { 2264 next->sg_list = (void *)((char *)next + 2265 ALIGN(sizeof *next, sizeof (struct ib_sge))); 2266 if (copy_from_user(next->sg_list, sgls + sg_ind, 2267 next->num_sge * 2268 sizeof(struct ib_sge))) { 2269 ret = -EFAULT; 2270 goto err; 2271 } 2272 sg_ind += next->num_sge; 2273 } else 2274 next->sg_list = NULL; 2275 } 2276 2277 kfree(user_wr); 2278 return wr; 2279 2280 err: 2281 kfree(user_wr); 2282 2283 while (wr) { 2284 next = wr->next; 2285 kfree(wr); 2286 wr = next; 2287 } 2288 2289 return ERR_PTR(ret); 2290 } 2291 2292 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) 2293 { 2294 struct ib_uverbs_post_recv cmd; 2295 struct ib_uverbs_post_recv_resp resp; 2296 struct ib_recv_wr *wr, *next; 2297 const struct ib_recv_wr *bad_wr; 2298 struct ib_qp *qp; 2299 int ret, ret2; 2300 struct uverbs_req_iter iter; 2301 2302 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2303 if (ret) 2304 return ret; 2305 2306 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2307 cmd.sge_count); 2308 if (IS_ERR(wr)) 2309 return PTR_ERR(wr); 2310 2311 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2312 if (!qp) { 2313 ret = -EINVAL; 2314 goto out; 2315 } 2316 2317 resp.bad_wr = 0; 2318 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr); 2319 2320 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2321 UVERBS_LOOKUP_READ); 2322 if (ret) { 2323 for (next = wr; next; next = next->next) { 2324 ++resp.bad_wr; 2325 if (next == bad_wr) 2326 break; 2327 } 2328 } 2329 2330 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2331 if (ret2) 2332 ret = ret2; 2333 out: 2334 while (wr) { 2335 next = wr->next; 2336 kfree(wr); 2337 wr = next; 2338 } 2339 2340 return ret; 2341 } 2342 2343 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) 2344 { 2345 struct ib_uverbs_post_srq_recv cmd; 2346 struct ib_uverbs_post_srq_recv_resp resp; 2347 struct ib_recv_wr *wr, *next; 2348 const struct ib_recv_wr *bad_wr; 2349 struct ib_srq *srq; 2350 int ret, ret2; 2351 struct uverbs_req_iter iter; 2352 2353 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 2354 if (ret) 2355 return ret; 2356 2357 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, 2358 cmd.sge_count); 2359 if (IS_ERR(wr)) 2360 return PTR_ERR(wr); 2361 2362 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 2363 if (!srq) { 2364 ret = -EINVAL; 2365 goto out; 2366 } 2367 2368 resp.bad_wr = 0; 2369 ret = srq->device->post_srq_recv(srq, wr, &bad_wr); 2370 2371 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 2372 UVERBS_LOOKUP_READ); 2373 2374 if (ret) 2375 for (next = wr; next; next = next->next) { 2376 ++resp.bad_wr; 2377 if (next == bad_wr) 2378 break; 2379 } 2380 2381 ret2 = uverbs_response(attrs, &resp, sizeof(resp)); 2382 if (ret2) 2383 ret = ret2; 2384 2385 out: 2386 while (wr) { 2387 next = wr->next; 2388 kfree(wr); 2389 wr = next; 2390 } 2391 2392 return ret; 2393 } 2394 2395 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) 2396 { 2397 struct ib_uverbs_create_ah cmd; 2398 struct ib_uverbs_create_ah_resp resp; 2399 struct ib_uobject *uobj; 2400 struct ib_pd *pd; 2401 struct ib_ah *ah; 2402 struct ib_ah_attr attr = {}; 2403 int ret; 2404 struct ib_device *ib_dev; 2405 2406 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2407 if (ret) 2408 return ret; 2409 2410 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); 2411 if (IS_ERR(uobj)) 2412 return PTR_ERR(uobj); 2413 2414 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { 2415 ret = -EINVAL; 2416 goto err; 2417 } 2418 2419 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2420 if (!pd) { 2421 ret = -EINVAL; 2422 goto err; 2423 } 2424 2425 attr.dlid = cmd.attr.dlid; 2426 attr.sl = cmd.attr.sl; 2427 attr.src_path_bits = cmd.attr.src_path_bits; 2428 attr.static_rate = cmd.attr.static_rate; 2429 attr.port_num = cmd.attr.port_num; 2430 2431 if (cmd.attr.is_global) { 2432 struct ib_global_route *grh = &attr.grh; 2433 2434 grh->flow_label = cmd.attr.grh.flow_label; 2435 grh->sgid_index = cmd.attr.grh.sgid_index; 2436 grh->hop_limit = cmd.attr.grh.hop_limit; 2437 grh->traffic_class = cmd.attr.grh.traffic_class; 2438 memcpy(grh->dgid.raw, cmd.attr.grh.dgid, sizeof(grh->dgid)); 2439 attr.ah_flags = IB_AH_GRH; 2440 } else { 2441 attr.ah_flags = 0; 2442 } 2443 2444 ah = ib_create_user_ah(pd, &attr, &attrs->driver_udata); 2445 if (IS_ERR(ah)) { 2446 ret = PTR_ERR(ah); 2447 goto err_put; 2448 } 2449 2450 ah->uobject = uobj; 2451 uobj->user_handle = cmd.user_handle; 2452 uobj->object = ah; 2453 2454 resp.ah_handle = uobj->id; 2455 2456 ret = uverbs_response(attrs, &resp, sizeof(resp)); 2457 if (ret) 2458 goto err_copy; 2459 2460 uobj_put_obj_read(pd); 2461 rdma_alloc_commit_uobject(uobj, attrs); 2462 return 0; 2463 2464 err_copy: 2465 ib_destroy_ah_user(ah, RDMA_DESTROY_AH_SLEEPABLE, 2466 uverbs_get_cleared_udata(attrs)); 2467 2468 err_put: 2469 uobj_put_obj_read(pd); 2470 2471 err: 2472 uobj_alloc_abort(uobj, attrs); 2473 return ret; 2474 } 2475 2476 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) 2477 { 2478 struct ib_uverbs_destroy_ah cmd; 2479 int ret; 2480 2481 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2482 if (ret) 2483 return ret; 2484 2485 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); 2486 } 2487 2488 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) 2489 { 2490 struct ib_uverbs_attach_mcast cmd; 2491 struct ib_qp *qp; 2492 struct ib_uqp_object *obj; 2493 struct ib_uverbs_mcast_entry *mcast; 2494 int ret; 2495 2496 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2497 if (ret) 2498 return ret; 2499 2500 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2501 if (!qp) 2502 return -EINVAL; 2503 2504 obj = qp->uobject; 2505 2506 mutex_lock(&obj->mcast_lock); 2507 list_for_each_entry(mcast, &obj->mcast_list, list) 2508 if (cmd.mlid == mcast->lid && 2509 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2510 ret = 0; 2511 goto out_put; 2512 } 2513 2514 mcast = kmalloc(sizeof *mcast, GFP_KERNEL); 2515 if (!mcast) { 2516 ret = -ENOMEM; 2517 goto out_put; 2518 } 2519 2520 mcast->lid = cmd.mlid; 2521 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); 2522 2523 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); 2524 if (!ret) 2525 list_add_tail(&mcast->list, &obj->mcast_list); 2526 else 2527 kfree(mcast); 2528 2529 out_put: 2530 mutex_unlock(&obj->mcast_lock); 2531 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2532 UVERBS_LOOKUP_READ); 2533 2534 return ret; 2535 } 2536 2537 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) 2538 { 2539 struct ib_uverbs_detach_mcast cmd; 2540 struct ib_uqp_object *obj; 2541 struct ib_qp *qp; 2542 struct ib_uverbs_mcast_entry *mcast; 2543 int ret; 2544 bool found = false; 2545 2546 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2547 if (ret) 2548 return ret; 2549 2550 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 2551 if (!qp) 2552 return -EINVAL; 2553 2554 obj = qp->uobject; 2555 mutex_lock(&obj->mcast_lock); 2556 2557 list_for_each_entry(mcast, &obj->mcast_list, list) 2558 if (cmd.mlid == mcast->lid && 2559 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { 2560 list_del(&mcast->list); 2561 kfree(mcast); 2562 found = true; 2563 break; 2564 } 2565 2566 if (!found) { 2567 ret = -EINVAL; 2568 goto out_put; 2569 } 2570 2571 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); 2572 2573 out_put: 2574 mutex_unlock(&obj->mcast_lock); 2575 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 2576 UVERBS_LOOKUP_READ); 2577 return ret; 2578 } 2579 2580 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) 2581 { 2582 struct ib_uflow_resources *resources; 2583 2584 resources = kzalloc(sizeof(*resources), GFP_KERNEL); 2585 2586 if (!resources) 2587 return NULL; 2588 2589 if (!num_specs) 2590 goto out; 2591 2592 resources->counters = 2593 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); 2594 resources->collection = 2595 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); 2596 2597 if (!resources->counters || !resources->collection) 2598 goto err; 2599 2600 out: 2601 resources->max = num_specs; 2602 return resources; 2603 2604 err: 2605 kfree(resources->counters); 2606 kfree(resources); 2607 2608 return NULL; 2609 } 2610 EXPORT_SYMBOL(flow_resources_alloc); 2611 2612 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) 2613 { 2614 unsigned int i; 2615 2616 if (!uflow_res) 2617 return; 2618 2619 for (i = 0; i < uflow_res->collection_num; i++) 2620 atomic_dec(&uflow_res->collection[i]->usecnt); 2621 2622 for (i = 0; i < uflow_res->counters_num; i++) 2623 atomic_dec(&uflow_res->counters[i]->usecnt); 2624 2625 kfree(uflow_res->collection); 2626 kfree(uflow_res->counters); 2627 kfree(uflow_res); 2628 } 2629 EXPORT_SYMBOL(ib_uverbs_flow_resources_free); 2630 2631 void flow_resources_add(struct ib_uflow_resources *uflow_res, 2632 enum ib_flow_spec_type type, 2633 void *ibobj) 2634 { 2635 WARN_ON(uflow_res->num >= uflow_res->max); 2636 2637 switch (type) { 2638 case IB_FLOW_SPEC_ACTION_HANDLE: 2639 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); 2640 uflow_res->collection[uflow_res->collection_num++] = 2641 (struct ib_flow_action *)ibobj; 2642 break; 2643 case IB_FLOW_SPEC_ACTION_COUNT: 2644 atomic_inc(&((struct ib_counters *)ibobj)->usecnt); 2645 uflow_res->counters[uflow_res->counters_num++] = 2646 (struct ib_counters *)ibobj; 2647 break; 2648 default: 2649 WARN_ON(1); 2650 } 2651 2652 uflow_res->num++; 2653 } 2654 EXPORT_SYMBOL(flow_resources_add); 2655 2656 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, 2657 struct ib_uverbs_flow_spec *kern_spec, 2658 union ib_flow_spec *ib_spec, 2659 struct ib_uflow_resources *uflow_res) 2660 { 2661 ib_spec->type = kern_spec->type; 2662 switch (ib_spec->type) { 2663 case IB_FLOW_SPEC_ACTION_TAG: 2664 if (kern_spec->flow_tag.size != 2665 sizeof(struct ib_uverbs_flow_spec_action_tag)) 2666 return -EINVAL; 2667 2668 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); 2669 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; 2670 break; 2671 case IB_FLOW_SPEC_ACTION_DROP: 2672 if (kern_spec->drop.size != 2673 sizeof(struct ib_uverbs_flow_spec_action_drop)) 2674 return -EINVAL; 2675 2676 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); 2677 break; 2678 case IB_FLOW_SPEC_ACTION_HANDLE: 2679 if (kern_spec->action.size != 2680 sizeof(struct ib_uverbs_flow_spec_action_handle)) 2681 return -EOPNOTSUPP; 2682 ib_spec->action.act = uobj_get_obj_read(flow_action, 2683 UVERBS_OBJECT_FLOW_ACTION, 2684 kern_spec->action.handle, 2685 attrs); 2686 if (!ib_spec->action.act) 2687 return -EINVAL; 2688 ib_spec->action.size = 2689 sizeof(struct ib_flow_spec_action_handle); 2690 flow_resources_add(uflow_res, 2691 IB_FLOW_SPEC_ACTION_HANDLE, 2692 ib_spec->action.act); 2693 uobj_put_obj_read(ib_spec->action.act); 2694 break; 2695 case IB_FLOW_SPEC_ACTION_COUNT: 2696 if (kern_spec->flow_count.size != 2697 sizeof(struct ib_uverbs_flow_spec_action_count)) 2698 return -EINVAL; 2699 ib_spec->flow_count.counters = 2700 uobj_get_obj_read(counters, 2701 UVERBS_OBJECT_COUNTERS, 2702 kern_spec->flow_count.handle, 2703 attrs); 2704 if (!ib_spec->flow_count.counters) 2705 return -EINVAL; 2706 ib_spec->flow_count.size = 2707 sizeof(struct ib_flow_spec_action_count); 2708 flow_resources_add(uflow_res, 2709 IB_FLOW_SPEC_ACTION_COUNT, 2710 ib_spec->flow_count.counters); 2711 uobj_put_obj_read(ib_spec->flow_count.counters); 2712 break; 2713 default: 2714 return -EINVAL; 2715 } 2716 return 0; 2717 } 2718 2719 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, 2720 u16 ib_real_filter_sz) 2721 { 2722 /* 2723 * User space filter structures must be 64 bit aligned, otherwise this 2724 * may pass, but we won't handle additional new attributes. 2725 */ 2726 2727 if (kern_filter_size > ib_real_filter_sz) { 2728 if (memchr_inv((const char *)kern_spec_filter + 2729 ib_real_filter_sz, 0, 2730 kern_filter_size - ib_real_filter_sz)) 2731 return -EINVAL; 2732 return ib_real_filter_sz; 2733 } 2734 return kern_filter_size; 2735 } 2736 2737 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, 2738 const void *kern_spec_mask, 2739 const void *kern_spec_val, 2740 size_t kern_filter_sz, 2741 union ib_flow_spec *ib_spec) 2742 { 2743 ssize_t actual_filter_sz; 2744 ssize_t ib_filter_sz; 2745 2746 /* User flow spec size must be aligned to 4 bytes */ 2747 if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) 2748 return -EINVAL; 2749 2750 ib_spec->type = type; 2751 2752 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) 2753 return -EINVAL; 2754 2755 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { 2756 case IB_FLOW_SPEC_ETH: 2757 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz); 2758 actual_filter_sz = spec_filter_size(kern_spec_mask, 2759 kern_filter_sz, 2760 ib_filter_sz); 2761 if (actual_filter_sz <= 0) 2762 return -EINVAL; 2763 ib_spec->size = sizeof(struct ib_flow_spec_eth); 2764 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); 2765 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); 2766 break; 2767 case IB_FLOW_SPEC_IPV4: 2768 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz); 2769 actual_filter_sz = spec_filter_size(kern_spec_mask, 2770 kern_filter_sz, 2771 ib_filter_sz); 2772 if (actual_filter_sz <= 0) 2773 return -EINVAL; 2774 ib_spec->size = sizeof(struct ib_flow_spec_ipv4); 2775 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); 2776 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); 2777 break; 2778 case IB_FLOW_SPEC_IPV6: 2779 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz); 2780 actual_filter_sz = spec_filter_size(kern_spec_mask, 2781 kern_filter_sz, 2782 ib_filter_sz); 2783 if (actual_filter_sz <= 0) 2784 return -EINVAL; 2785 ib_spec->size = sizeof(struct ib_flow_spec_ipv6); 2786 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); 2787 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); 2788 2789 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || 2790 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) 2791 return -EINVAL; 2792 break; 2793 case IB_FLOW_SPEC_TCP: 2794 case IB_FLOW_SPEC_UDP: 2795 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz); 2796 actual_filter_sz = spec_filter_size(kern_spec_mask, 2797 kern_filter_sz, 2798 ib_filter_sz); 2799 if (actual_filter_sz <= 0) 2800 return -EINVAL; 2801 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); 2802 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); 2803 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); 2804 break; 2805 case IB_FLOW_SPEC_VXLAN_TUNNEL: 2806 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz); 2807 actual_filter_sz = spec_filter_size(kern_spec_mask, 2808 kern_filter_sz, 2809 ib_filter_sz); 2810 if (actual_filter_sz <= 0) 2811 return -EINVAL; 2812 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); 2813 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); 2814 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); 2815 2816 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || 2817 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) 2818 return -EINVAL; 2819 break; 2820 case IB_FLOW_SPEC_ESP: 2821 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz); 2822 actual_filter_sz = spec_filter_size(kern_spec_mask, 2823 kern_filter_sz, 2824 ib_filter_sz); 2825 if (actual_filter_sz <= 0) 2826 return -EINVAL; 2827 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); 2828 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); 2829 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); 2830 break; 2831 case IB_FLOW_SPEC_GRE: 2832 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz); 2833 actual_filter_sz = spec_filter_size(kern_spec_mask, 2834 kern_filter_sz, 2835 ib_filter_sz); 2836 if (actual_filter_sz <= 0) 2837 return -EINVAL; 2838 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); 2839 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); 2840 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); 2841 break; 2842 case IB_FLOW_SPEC_MPLS: 2843 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz); 2844 actual_filter_sz = spec_filter_size(kern_spec_mask, 2845 kern_filter_sz, 2846 ib_filter_sz); 2847 if (actual_filter_sz <= 0) 2848 return -EINVAL; 2849 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); 2850 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); 2851 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); 2852 break; 2853 default: 2854 return -EINVAL; 2855 } 2856 return 0; 2857 } 2858 2859 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, 2860 union ib_flow_spec *ib_spec) 2861 { 2862 size_t kern_filter_sz; 2863 void *kern_spec_mask; 2864 void *kern_spec_val; 2865 2866 if (kern_spec->hdr.size < sizeof(struct ib_uverbs_flow_spec_hdr)) 2867 return -EINVAL; 2868 kern_filter_sz = kern_spec->hdr.size - sizeof(struct ib_uverbs_flow_spec_hdr); 2869 kern_filter_sz /= 2; 2870 2871 kern_spec_val = (u8 *)kern_spec + 2872 sizeof(struct ib_uverbs_flow_spec_hdr); 2873 kern_spec_mask = (u8 *)kern_spec_val + kern_filter_sz; 2874 2875 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, 2876 kern_spec_mask, 2877 kern_spec_val, 2878 kern_filter_sz, ib_spec); 2879 } 2880 2881 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, 2882 struct ib_uverbs_flow_spec *kern_spec, 2883 union ib_flow_spec *ib_spec, 2884 struct ib_uflow_resources *uflow_res) 2885 { 2886 if (kern_spec->reserved) 2887 return -EINVAL; 2888 2889 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) 2890 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, 2891 uflow_res); 2892 else 2893 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); 2894 } 2895 2896 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) 2897 { 2898 struct ib_uverbs_ex_create_wq cmd; 2899 struct ib_uverbs_ex_create_wq_resp resp = {}; 2900 struct ib_uwq_object *obj; 2901 int err = 0; 2902 struct ib_cq *cq; 2903 struct ib_pd *pd; 2904 struct ib_wq *wq; 2905 struct ib_wq_init_attr wq_init_attr = {}; 2906 struct ib_device *ib_dev; 2907 2908 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 2909 if (err) 2910 return err; 2911 2912 if (cmd.comp_mask) 2913 return -EOPNOTSUPP; 2914 2915 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, 2916 &ib_dev); 2917 if (IS_ERR(obj)) 2918 return PTR_ERR(obj); 2919 2920 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); 2921 if (!pd) { 2922 err = -EINVAL; 2923 goto err_uobj; 2924 } 2925 2926 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 2927 if (!cq) { 2928 err = -EINVAL; 2929 goto err_put_pd; 2930 } 2931 2932 wq_init_attr.cq = cq; 2933 wq_init_attr.max_sge = cmd.max_sge; 2934 wq_init_attr.max_wr = cmd.max_wr; 2935 wq_init_attr.wq_context = attrs->ufile; 2936 wq_init_attr.wq_type = cmd.wq_type; 2937 wq_init_attr.event_handler = ib_uverbs_wq_event_handler; 2938 wq_init_attr.create_flags = cmd.create_flags; 2939 INIT_LIST_HEAD(&obj->uevent.event_list); 2940 2941 wq = pd->device->create_wq(pd, &wq_init_attr, &attrs->driver_udata); 2942 if (IS_ERR(wq)) { 2943 err = PTR_ERR(wq); 2944 goto err_put_cq; 2945 } 2946 2947 wq->uobject = obj; 2948 obj->uevent.uobject.object = wq; 2949 wq->wq_type = wq_init_attr.wq_type; 2950 wq->cq = cq; 2951 wq->pd = pd; 2952 wq->device = pd->device; 2953 wq->wq_context = wq_init_attr.wq_context; 2954 atomic_set(&wq->usecnt, 0); 2955 atomic_inc(&pd->usecnt); 2956 atomic_inc(&cq->usecnt); 2957 wq->uobject = obj; 2958 obj->uevent.uobject.object = wq; 2959 2960 memset(&resp, 0, sizeof(resp)); 2961 resp.wq_handle = obj->uevent.uobject.id; 2962 resp.max_sge = wq_init_attr.max_sge; 2963 resp.max_wr = wq_init_attr.max_wr; 2964 resp.wqn = wq->wq_num; 2965 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 2966 err = uverbs_response(attrs, &resp, sizeof(resp)); 2967 if (err) 2968 goto err_copy; 2969 2970 uobj_put_obj_read(pd); 2971 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2972 UVERBS_LOOKUP_READ); 2973 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 2974 return 0; 2975 2976 err_copy: 2977 ib_destroy_wq(wq, uverbs_get_cleared_udata(attrs)); 2978 err_put_cq: 2979 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 2980 UVERBS_LOOKUP_READ); 2981 err_put_pd: 2982 uobj_put_obj_read(pd); 2983 err_uobj: 2984 uobj_alloc_abort(&obj->uevent.uobject, attrs); 2985 2986 return err; 2987 } 2988 2989 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) 2990 { 2991 struct ib_uverbs_ex_destroy_wq cmd; 2992 struct ib_uverbs_ex_destroy_wq_resp resp = {}; 2993 struct ib_uobject *uobj; 2994 struct ib_uwq_object *obj; 2995 int ret; 2996 2997 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 2998 if (ret) 2999 return ret; 3000 3001 if (cmd.comp_mask) 3002 return -EOPNOTSUPP; 3003 3004 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3005 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3006 if (IS_ERR(uobj)) 3007 return PTR_ERR(uobj); 3008 3009 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); 3010 resp.events_reported = obj->uevent.events_reported; 3011 3012 uobj_put_destroy(uobj); 3013 3014 return uverbs_response(attrs, &resp, sizeof(resp)); 3015 } 3016 3017 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) 3018 { 3019 struct ib_uverbs_ex_modify_wq cmd; 3020 struct ib_wq *wq; 3021 struct ib_wq_attr wq_attr = {}; 3022 int ret; 3023 3024 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3025 if (ret) 3026 return ret; 3027 3028 if (!cmd.attr_mask) 3029 return -EINVAL; 3030 3031 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) 3032 return -EINVAL; 3033 3034 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); 3035 if (!wq) 3036 return -EINVAL; 3037 3038 wq_attr.curr_wq_state = cmd.curr_wq_state; 3039 wq_attr.wq_state = cmd.wq_state; 3040 if (cmd.attr_mask & IB_WQ_FLAGS) { 3041 wq_attr.flags = cmd.flags; 3042 wq_attr.flags_mask = cmd.flags_mask; 3043 } 3044 ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, 3045 &attrs->driver_udata); 3046 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, 3047 UVERBS_LOOKUP_READ); 3048 return ret; 3049 } 3050 3051 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3052 { 3053 struct ib_uverbs_ex_create_rwq_ind_table cmd; 3054 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; 3055 struct ib_uobject *uobj; 3056 int err; 3057 struct ib_rwq_ind_table_init_attr init_attr = {}; 3058 struct ib_rwq_ind_table *rwq_ind_tbl; 3059 struct ib_wq **wqs = NULL; 3060 u32 *wqs_handles = NULL; 3061 struct ib_wq *wq = NULL; 3062 int i, j, num_read_wqs; 3063 u32 num_wq_handles; 3064 struct uverbs_req_iter iter; 3065 struct ib_device *ib_dev; 3066 3067 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3068 if (err) 3069 return err; 3070 3071 if (cmd.comp_mask) 3072 return -EOPNOTSUPP; 3073 3074 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) 3075 return -EINVAL; 3076 3077 num_wq_handles = 1 << cmd.log_ind_tbl_size; 3078 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), 3079 GFP_KERNEL); 3080 if (!wqs_handles) 3081 return -ENOMEM; 3082 3083 err = uverbs_request_next(&iter, wqs_handles, 3084 num_wq_handles * sizeof(__u32)); 3085 if (err) 3086 goto err_free; 3087 3088 err = uverbs_request_finish(&iter); 3089 if (err) 3090 goto err_free; 3091 3092 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); 3093 if (!wqs) { 3094 err = -ENOMEM; 3095 goto err_free; 3096 } 3097 3098 for (num_read_wqs = 0; num_read_wqs < num_wq_handles; 3099 num_read_wqs++) { 3100 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, 3101 wqs_handles[num_read_wqs], attrs); 3102 if (!wq) { 3103 err = -EINVAL; 3104 goto put_wqs; 3105 } 3106 3107 wqs[num_read_wqs] = wq; 3108 } 3109 3110 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); 3111 if (IS_ERR(uobj)) { 3112 err = PTR_ERR(uobj); 3113 goto put_wqs; 3114 } 3115 3116 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; 3117 init_attr.ind_tbl = wqs; 3118 3119 rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, 3120 &attrs->driver_udata); 3121 3122 if (IS_ERR(rwq_ind_tbl)) { 3123 err = PTR_ERR(rwq_ind_tbl); 3124 goto err_uobj; 3125 } 3126 3127 rwq_ind_tbl->ind_tbl = wqs; 3128 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; 3129 rwq_ind_tbl->uobject = uobj; 3130 uobj->object = rwq_ind_tbl; 3131 rwq_ind_tbl->device = ib_dev; 3132 atomic_set(&rwq_ind_tbl->usecnt, 0); 3133 3134 for (i = 0; i < num_wq_handles; i++) 3135 atomic_inc(&wqs[i]->usecnt); 3136 3137 resp.ind_tbl_handle = uobj->id; 3138 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; 3139 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3140 3141 err = uverbs_response(attrs, &resp, sizeof(resp)); 3142 if (err) 3143 goto err_copy; 3144 3145 kfree(wqs_handles); 3146 3147 for (j = 0; j < num_read_wqs; j++) 3148 rdma_lookup_put_uobject(&wqs[j]->uobject->uevent.uobject, 3149 UVERBS_LOOKUP_READ); 3150 3151 rdma_alloc_commit_uobject(uobj, attrs); 3152 return 0; 3153 3154 err_copy: 3155 ib_destroy_rwq_ind_table(rwq_ind_tbl); 3156 err_uobj: 3157 uobj_alloc_abort(uobj, attrs); 3158 put_wqs: 3159 for (j = 0; j < num_read_wqs; j++) 3160 rdma_lookup_put_uobject(&wqs[j]->uobject->uevent.uobject, 3161 UVERBS_LOOKUP_READ); 3162 err_free: 3163 kfree(wqs_handles); 3164 kfree(wqs); 3165 return err; 3166 } 3167 3168 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) 3169 { 3170 struct ib_uverbs_ex_destroy_rwq_ind_table cmd; 3171 int ret; 3172 3173 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3174 if (ret) 3175 return ret; 3176 3177 if (cmd.comp_mask) 3178 return -EOPNOTSUPP; 3179 3180 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, 3181 cmd.ind_tbl_handle, attrs); 3182 } 3183 3184 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) 3185 { 3186 struct ib_uverbs_create_flow cmd; 3187 struct ib_uverbs_create_flow_resp resp; 3188 struct ib_uobject *uobj; 3189 struct ib_flow *flow_id; 3190 struct ib_uverbs_flow_attr *kern_flow_attr; 3191 struct ib_flow_attr *flow_attr; 3192 struct ib_qp *qp; 3193 struct ib_uflow_resources *uflow_res; 3194 struct ib_uverbs_flow_spec_hdr *kern_spec; 3195 struct uverbs_req_iter iter; 3196 int err; 3197 void *ib_spec; 3198 int i; 3199 struct ib_device *ib_dev; 3200 3201 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); 3202 if (err) 3203 return err; 3204 3205 if (cmd.comp_mask) 3206 return -EINVAL; 3207 3208 if (priv_check(curthread, PRIV_NET_RAW) != 0) 3209 return -EPERM; 3210 3211 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) 3212 return -EINVAL; 3213 3214 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && 3215 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || 3216 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) 3217 return -EINVAL; 3218 3219 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) 3220 return -EINVAL; 3221 3222 if (cmd.flow_attr.size > 3223 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) 3224 return -EINVAL; 3225 3226 if (cmd.flow_attr.reserved[0] || 3227 cmd.flow_attr.reserved[1]) 3228 return -EINVAL; 3229 3230 if (cmd.flow_attr.num_of_specs) { 3231 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, 3232 GFP_KERNEL); 3233 if (!kern_flow_attr) 3234 return -ENOMEM; 3235 3236 *kern_flow_attr = cmd.flow_attr; 3237 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, 3238 cmd.flow_attr.size); 3239 if (err) 3240 goto err_free_attr; 3241 } else { 3242 kern_flow_attr = &cmd.flow_attr; 3243 } 3244 3245 err = uverbs_request_finish(&iter); 3246 if (err) 3247 goto err_free_attr; 3248 3249 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); 3250 if (IS_ERR(uobj)) { 3251 err = PTR_ERR(uobj); 3252 goto err_free_attr; 3253 } 3254 3255 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); 3256 if (!qp) { 3257 err = -EINVAL; 3258 goto err_uobj; 3259 } 3260 3261 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { 3262 err = -EINVAL; 3263 goto err_put; 3264 } 3265 3266 flow_attr = kzalloc(struct_size(flow_attr, flows, 3267 cmd.flow_attr.num_of_specs), GFP_KERNEL); 3268 if (!flow_attr) { 3269 err = -ENOMEM; 3270 goto err_put; 3271 } 3272 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); 3273 if (!uflow_res) { 3274 err = -ENOMEM; 3275 goto err_free_flow_attr; 3276 } 3277 3278 flow_attr->type = kern_flow_attr->type; 3279 flow_attr->priority = kern_flow_attr->priority; 3280 flow_attr->num_of_specs = kern_flow_attr->num_of_specs; 3281 flow_attr->port = kern_flow_attr->port; 3282 flow_attr->flags = kern_flow_attr->flags; 3283 flow_attr->size = sizeof(*flow_attr); 3284 3285 kern_spec = kern_flow_attr->flow_specs; 3286 ib_spec = flow_attr + 1; 3287 for (i = 0; i < flow_attr->num_of_specs && 3288 cmd.flow_attr.size >= sizeof(*kern_spec) && 3289 cmd.flow_attr.size >= kern_spec->size; 3290 i++) { 3291 err = kern_spec_to_ib_spec( 3292 attrs, (struct ib_uverbs_flow_spec *)kern_spec, 3293 ib_spec, uflow_res); 3294 if (err) 3295 goto err_free; 3296 3297 flow_attr->size += 3298 ((union ib_flow_spec *) ib_spec)->size; 3299 cmd.flow_attr.size -= kern_spec->size; 3300 kern_spec = (struct ib_uverbs_flow_spec_hdr *)((u8 *)kern_spec + kern_spec->size); 3301 ib_spec = (u8 *)ib_spec + ((union ib_flow_spec *) ib_spec)->size; 3302 } 3303 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { 3304 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n", 3305 i, cmd.flow_attr.size); 3306 err = -EINVAL; 3307 goto err_free; 3308 } 3309 3310 flow_id = qp->device->create_flow( 3311 qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata); 3312 3313 if (IS_ERR(flow_id)) { 3314 err = PTR_ERR(flow_id); 3315 goto err_free; 3316 } 3317 3318 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); 3319 3320 memset(&resp, 0, sizeof(resp)); 3321 resp.flow_handle = uobj->id; 3322 3323 err = uverbs_response(attrs, &resp, sizeof(resp)); 3324 if (err) 3325 goto err_copy; 3326 3327 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3328 UVERBS_LOOKUP_READ); 3329 kfree(flow_attr); 3330 if (cmd.flow_attr.num_of_specs) 3331 kfree(kern_flow_attr); 3332 rdma_alloc_commit_uobject(uobj, attrs); 3333 return 0; 3334 err_copy: 3335 if (!qp->device->destroy_flow(flow_id)) 3336 atomic_dec(&qp->usecnt); 3337 err_free: 3338 ib_uverbs_flow_resources_free(uflow_res); 3339 err_free_flow_attr: 3340 kfree(flow_attr); 3341 err_put: 3342 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, 3343 UVERBS_LOOKUP_READ); 3344 err_uobj: 3345 uobj_alloc_abort(uobj, attrs); 3346 err_free_attr: 3347 if (cmd.flow_attr.num_of_specs) 3348 kfree(kern_flow_attr); 3349 return err; 3350 } 3351 3352 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) 3353 { 3354 struct ib_uverbs_destroy_flow cmd; 3355 int ret; 3356 3357 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3358 if (ret) 3359 return ret; 3360 3361 if (cmd.comp_mask) 3362 return -EINVAL; 3363 3364 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); 3365 } 3366 3367 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, 3368 struct ib_uverbs_create_xsrq *cmd, 3369 struct ib_udata *udata) 3370 { 3371 struct ib_uverbs_create_srq_resp resp; 3372 struct ib_usrq_object *obj; 3373 struct ib_pd *pd; 3374 struct ib_srq *srq; 3375 struct ib_uobject *uninitialized_var(xrcd_uobj); 3376 struct ib_srq_init_attr attr; 3377 int ret; 3378 struct ib_device *ib_dev; 3379 3380 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, 3381 &ib_dev); 3382 if (IS_ERR(obj)) 3383 return PTR_ERR(obj); 3384 3385 if (cmd->srq_type == IB_SRQT_TM) 3386 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; 3387 3388 if (cmd->srq_type == IB_SRQT_XRC) { 3389 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, 3390 attrs); 3391 if (IS_ERR(xrcd_uobj)) { 3392 ret = -EINVAL; 3393 goto err; 3394 } 3395 3396 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; 3397 if (!attr.ext.xrc.xrcd) { 3398 ret = -EINVAL; 3399 goto err_put_xrcd; 3400 } 3401 3402 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); 3403 atomic_inc(&obj->uxrcd->refcnt); 3404 } 3405 3406 if (ib_srq_has_cq(cmd->srq_type)) { 3407 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, 3408 cmd->cq_handle, attrs); 3409 if (!attr.ext.cq) { 3410 ret = -EINVAL; 3411 goto err_put_xrcd; 3412 } 3413 } 3414 3415 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); 3416 if (!pd) { 3417 ret = -EINVAL; 3418 goto err_put_cq; 3419 } 3420 3421 attr.event_handler = ib_uverbs_srq_event_handler; 3422 attr.srq_context = attrs->ufile; 3423 attr.srq_type = cmd->srq_type; 3424 attr.attr.max_wr = cmd->max_wr; 3425 attr.attr.max_sge = cmd->max_sge; 3426 attr.attr.srq_limit = cmd->srq_limit; 3427 3428 INIT_LIST_HEAD(&obj->uevent.event_list); 3429 3430 srq = rdma_zalloc_drv_obj(ib_dev, ib_srq); 3431 if (!srq) { 3432 ret = -ENOMEM; 3433 goto err_put; 3434 } 3435 3436 srq->device = pd->device; 3437 srq->pd = pd; 3438 srq->srq_type = cmd->srq_type; 3439 srq->uobject = obj; 3440 srq->event_handler = attr.event_handler; 3441 srq->srq_context = attr.srq_context; 3442 3443 ret = pd->device->create_srq(srq, &attr, udata); 3444 if (ret) 3445 goto err_free; 3446 3447 if (ib_srq_has_cq(cmd->srq_type)) { 3448 srq->ext.cq = attr.ext.cq; 3449 atomic_inc(&attr.ext.cq->usecnt); 3450 } 3451 3452 if (cmd->srq_type == IB_SRQT_XRC) { 3453 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd; 3454 atomic_inc(&attr.ext.xrc.xrcd->usecnt); 3455 } 3456 3457 atomic_inc(&pd->usecnt); 3458 atomic_set(&srq->usecnt, 0); 3459 3460 obj->uevent.uobject.object = srq; 3461 obj->uevent.uobject.user_handle = cmd->user_handle; 3462 3463 memset(&resp, 0, sizeof resp); 3464 resp.srq_handle = obj->uevent.uobject.id; 3465 resp.max_wr = attr.attr.max_wr; 3466 resp.max_sge = attr.attr.max_sge; 3467 if (cmd->srq_type == IB_SRQT_XRC) 3468 resp.srqn = srq->ext.xrc.srq_num; 3469 3470 ret = uverbs_response(attrs, &resp, sizeof(resp)); 3471 if (ret) 3472 goto err_copy; 3473 3474 if (cmd->srq_type == IB_SRQT_XRC) 3475 uobj_put_read(xrcd_uobj); 3476 3477 if (ib_srq_has_cq(cmd->srq_type)) 3478 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3479 UVERBS_LOOKUP_READ); 3480 3481 uobj_put_obj_read(pd); 3482 rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs); 3483 return 0; 3484 3485 err_copy: 3486 ib_destroy_srq_user(srq, uverbs_get_cleared_udata(attrs)); 3487 /* It was released in ib_destroy_srq_user */ 3488 srq = NULL; 3489 err_free: 3490 kfree(srq); 3491 err_put: 3492 uobj_put_obj_read(pd); 3493 3494 err_put_cq: 3495 if (ib_srq_has_cq(cmd->srq_type)) 3496 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, 3497 UVERBS_LOOKUP_READ); 3498 3499 err_put_xrcd: 3500 if (cmd->srq_type == IB_SRQT_XRC) { 3501 atomic_dec(&obj->uxrcd->refcnt); 3502 uobj_put_read(xrcd_uobj); 3503 } 3504 3505 err: 3506 uobj_alloc_abort(&obj->uevent.uobject, attrs); 3507 return ret; 3508 } 3509 3510 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) 3511 { 3512 struct ib_uverbs_create_srq cmd; 3513 struct ib_uverbs_create_xsrq xcmd; 3514 int ret; 3515 3516 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3517 if (ret) 3518 return ret; 3519 3520 memset(&xcmd, 0, sizeof(xcmd)); 3521 xcmd.response = cmd.response; 3522 xcmd.user_handle = cmd.user_handle; 3523 xcmd.srq_type = IB_SRQT_BASIC; 3524 xcmd.pd_handle = cmd.pd_handle; 3525 xcmd.max_wr = cmd.max_wr; 3526 xcmd.max_sge = cmd.max_sge; 3527 xcmd.srq_limit = cmd.srq_limit; 3528 3529 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); 3530 } 3531 3532 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) 3533 { 3534 struct ib_uverbs_create_xsrq cmd; 3535 int ret; 3536 3537 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3538 if (ret) 3539 return ret; 3540 3541 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); 3542 } 3543 3544 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) 3545 { 3546 struct ib_uverbs_modify_srq cmd; 3547 struct ib_srq *srq; 3548 struct ib_srq_attr attr; 3549 int ret; 3550 3551 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3552 if (ret) 3553 return ret; 3554 3555 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3556 if (!srq) 3557 return -EINVAL; 3558 3559 attr.max_wr = cmd.max_wr; 3560 attr.srq_limit = cmd.srq_limit; 3561 3562 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, 3563 &attrs->driver_udata); 3564 3565 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3566 UVERBS_LOOKUP_READ); 3567 3568 return ret; 3569 } 3570 3571 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) 3572 { 3573 struct ib_uverbs_query_srq cmd; 3574 struct ib_uverbs_query_srq_resp resp; 3575 struct ib_srq_attr attr; 3576 struct ib_srq *srq; 3577 int ret; 3578 3579 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3580 if (ret) 3581 return ret; 3582 3583 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3584 if (!srq) 3585 return -EINVAL; 3586 3587 ret = ib_query_srq(srq, &attr); 3588 3589 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, 3590 UVERBS_LOOKUP_READ); 3591 3592 if (ret) 3593 return ret; 3594 3595 memset(&resp, 0, sizeof resp); 3596 3597 resp.max_wr = attr.max_wr; 3598 resp.max_sge = attr.max_sge; 3599 resp.srq_limit = attr.srq_limit; 3600 3601 return uverbs_response(attrs, &resp, sizeof(resp)); 3602 } 3603 3604 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) 3605 { 3606 struct ib_uverbs_destroy_srq cmd; 3607 struct ib_uverbs_destroy_srq_resp resp; 3608 struct ib_uobject *uobj; 3609 struct ib_uevent_object *obj; 3610 int ret; 3611 3612 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3613 if (ret) 3614 return ret; 3615 3616 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); 3617 if (IS_ERR(uobj)) 3618 return PTR_ERR(uobj); 3619 3620 obj = container_of(uobj, struct ib_uevent_object, uobject); 3621 memset(&resp, 0, sizeof(resp)); 3622 resp.events_reported = obj->events_reported; 3623 3624 uobj_put_destroy(uobj); 3625 3626 return uverbs_response(attrs, &resp, sizeof(resp)); 3627 } 3628 3629 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) 3630 { 3631 struct ib_uverbs_ex_query_device_resp resp = {}; 3632 struct ib_uverbs_ex_query_device cmd; 3633 struct ib_device_attr attr = {0}; 3634 struct ib_ucontext *ucontext; 3635 struct ib_device *ib_dev; 3636 int err; 3637 3638 ucontext = ib_uverbs_get_ucontext(attrs); 3639 if (IS_ERR(ucontext)) 3640 return PTR_ERR(ucontext); 3641 ib_dev = ucontext->device; 3642 3643 err = uverbs_request(attrs, &cmd, sizeof(cmd)); 3644 if (err) 3645 return err; 3646 3647 if (cmd.comp_mask) 3648 return -EINVAL; 3649 3650 if (cmd.reserved) 3651 return -EINVAL; 3652 3653 err = ib_dev->query_device(ib_dev, &attr, &attrs->driver_udata); 3654 if (err) 3655 return err; 3656 3657 copy_query_dev_fields(ucontext, &resp.base, &attr); 3658 3659 resp.odp_caps.general_caps = attr.odp_caps.general_caps; 3660 resp.odp_caps.per_transport_caps.rc_odp_caps = 3661 attr.odp_caps.per_transport_caps.rc_odp_caps; 3662 resp.odp_caps.per_transport_caps.uc_odp_caps = 3663 attr.odp_caps.per_transport_caps.uc_odp_caps; 3664 resp.odp_caps.per_transport_caps.ud_odp_caps = 3665 attr.odp_caps.per_transport_caps.ud_odp_caps; 3666 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; 3667 3668 resp.timestamp_mask = attr.timestamp_mask; 3669 resp.hca_core_clock = attr.hca_core_clock; 3670 resp.device_cap_flags_ex = attr.device_cap_flags; 3671 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; 3672 resp.rss_caps.max_rwq_indirection_tables = 3673 attr.rss_caps.max_rwq_indirection_tables; 3674 resp.rss_caps.max_rwq_indirection_table_size = 3675 attr.rss_caps.max_rwq_indirection_table_size; 3676 resp.max_wq_type_rq = attr.max_wq_type_rq; 3677 resp.raw_packet_caps = attr.raw_packet_caps; 3678 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; 3679 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; 3680 resp.tm_caps.max_ops = attr.tm_caps.max_ops; 3681 resp.tm_caps.max_sge = attr.tm_caps.max_sge; 3682 resp.tm_caps.flags = attr.tm_caps.flags; 3683 resp.cq_moderation_caps.max_cq_moderation_count = 3684 attr.cq_caps.max_cq_moderation_count; 3685 resp.cq_moderation_caps.max_cq_moderation_period = 3686 attr.cq_caps.max_cq_moderation_period; 3687 resp.max_dm_size = attr.max_dm_size; 3688 resp.response_length = uverbs_response_length(attrs, sizeof(resp)); 3689 3690 return uverbs_response(attrs, &resp, sizeof(resp)); 3691 } 3692 3693 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) 3694 { 3695 struct ib_uverbs_ex_modify_cq cmd; 3696 struct ib_cq *cq; 3697 int ret; 3698 3699 ret = uverbs_request(attrs, &cmd, sizeof(cmd)); 3700 if (ret) 3701 return ret; 3702 3703 if (!cmd.attr_mask || cmd.reserved) 3704 return -EINVAL; 3705 3706 if (cmd.attr_mask > IB_CQ_MODERATE) 3707 return -EOPNOTSUPP; 3708 3709 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); 3710 if (!cq) 3711 return -EINVAL; 3712 3713 ret = ib_modify_cq(cq, cmd.attr.cq_count, cmd.attr.cq_period); 3714 3715 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, 3716 UVERBS_LOOKUP_READ); 3717 return ret; 3718 } 3719 3720 /* 3721 * Describe the input structs for write(). Some write methods have an input 3722 * only struct, most have an input and output. If the struct has an output then 3723 * the 'response' u64 must be the first field in the request structure. 3724 * 3725 * If udata is present then both the request and response structs have a 3726 * trailing driver_data flex array. In this case the size of the base struct 3727 * cannot be changed. 3728 */ 3729 #define UAPI_DEF_WRITE_IO(req, resp) \ 3730 .write.has_resp = 1 + \ 3731 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ 3732 BUILD_BUG_ON_ZERO(sizeof(((req *)0)->response) != \ 3733 sizeof(u64)), \ 3734 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) 3735 3736 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) 3737 3738 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ 3739 UAPI_DEF_WRITE_IO(req, resp), \ 3740 .write.has_udata = \ 3741 1 + \ 3742 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3743 sizeof(req)) + \ 3744 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ 3745 sizeof(resp)) 3746 3747 #define UAPI_DEF_WRITE_UDATA_I(req) \ 3748 UAPI_DEF_WRITE_I(req), \ 3749 .write.has_udata = \ 3750 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ 3751 sizeof(req)) 3752 3753 /* 3754 * The _EX versions are for use with WRITE_EX and allow the last struct member 3755 * to be specified. Buffers that do not include that member will be rejected. 3756 */ 3757 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ 3758 .write.has_resp = 1, \ 3759 .write.req_size = offsetofend(req, req_last_member), \ 3760 .write.resp_size = offsetofend(resp, resp_last_member) 3761 3762 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ 3763 .write.req_size = offsetofend(req, req_last_member) 3764 3765 const struct uapi_definition uverbs_def_write_intf[] = { 3766 DECLARE_UVERBS_OBJECT( 3767 UVERBS_OBJECT_AH, 3768 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, 3769 ib_uverbs_create_ah, 3770 UAPI_DEF_WRITE_UDATA_IO( 3771 struct ib_uverbs_create_ah, 3772 struct ib_uverbs_create_ah_resp), 3773 UAPI_DEF_METHOD_NEEDS_FN(create_ah)), 3774 DECLARE_UVERBS_WRITE( 3775 IB_USER_VERBS_CMD_DESTROY_AH, 3776 ib_uverbs_destroy_ah, 3777 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah), 3778 UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))), 3779 3780 DECLARE_UVERBS_OBJECT( 3781 UVERBS_OBJECT_COMP_CHANNEL, 3782 DECLARE_UVERBS_WRITE( 3783 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, 3784 ib_uverbs_create_comp_channel, 3785 UAPI_DEF_WRITE_IO( 3786 struct ib_uverbs_create_comp_channel, 3787 struct ib_uverbs_create_comp_channel_resp))), 3788 3789 DECLARE_UVERBS_OBJECT( 3790 UVERBS_OBJECT_CQ, 3791 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, 3792 ib_uverbs_create_cq, 3793 UAPI_DEF_WRITE_UDATA_IO( 3794 struct ib_uverbs_create_cq, 3795 struct ib_uverbs_create_cq_resp), 3796 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3797 DECLARE_UVERBS_WRITE( 3798 IB_USER_VERBS_CMD_DESTROY_CQ, 3799 ib_uverbs_destroy_cq, 3800 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, 3801 struct ib_uverbs_destroy_cq_resp), 3802 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), 3803 DECLARE_UVERBS_WRITE( 3804 IB_USER_VERBS_CMD_POLL_CQ, 3805 ib_uverbs_poll_cq, 3806 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, 3807 struct ib_uverbs_poll_cq_resp), 3808 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), 3809 DECLARE_UVERBS_WRITE( 3810 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, 3811 ib_uverbs_req_notify_cq, 3812 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), 3813 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), 3814 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, 3815 ib_uverbs_resize_cq, 3816 UAPI_DEF_WRITE_UDATA_IO( 3817 struct ib_uverbs_resize_cq, 3818 struct ib_uverbs_resize_cq_resp), 3819 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), 3820 DECLARE_UVERBS_WRITE_EX( 3821 IB_USER_VERBS_EX_CMD_CREATE_CQ, 3822 ib_uverbs_ex_create_cq, 3823 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, 3824 reserved, 3825 struct ib_uverbs_ex_create_cq_resp, 3826 response_length), 3827 UAPI_DEF_METHOD_NEEDS_FN(create_cq)), 3828 DECLARE_UVERBS_WRITE_EX( 3829 IB_USER_VERBS_EX_CMD_MODIFY_CQ, 3830 ib_uverbs_ex_modify_cq, 3831 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), 3832 UAPI_DEF_METHOD_NEEDS_FN(create_cq))), 3833 3834 DECLARE_UVERBS_OBJECT( 3835 UVERBS_OBJECT_DEVICE, 3836 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, 3837 ib_uverbs_get_context, 3838 UAPI_DEF_WRITE_UDATA_IO( 3839 struct ib_uverbs_get_context, 3840 struct ib_uverbs_get_context_resp)), 3841 DECLARE_UVERBS_WRITE( 3842 IB_USER_VERBS_CMD_QUERY_DEVICE, 3843 ib_uverbs_query_device, 3844 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, 3845 struct ib_uverbs_query_device_resp)), 3846 DECLARE_UVERBS_WRITE( 3847 IB_USER_VERBS_CMD_QUERY_PORT, 3848 ib_uverbs_query_port, 3849 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, 3850 struct ib_uverbs_query_port_resp), 3851 UAPI_DEF_METHOD_NEEDS_FN(query_port)), 3852 DECLARE_UVERBS_WRITE_EX( 3853 IB_USER_VERBS_EX_CMD_QUERY_DEVICE, 3854 ib_uverbs_ex_query_device, 3855 UAPI_DEF_WRITE_IO_EX( 3856 struct ib_uverbs_ex_query_device, 3857 reserved, 3858 struct ib_uverbs_ex_query_device_resp, 3859 response_length), 3860 UAPI_DEF_METHOD_NEEDS_FN(query_device)), 3861 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), 3862 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), 3863 3864 DECLARE_UVERBS_OBJECT( 3865 UVERBS_OBJECT_FLOW, 3866 DECLARE_UVERBS_WRITE_EX( 3867 IB_USER_VERBS_EX_CMD_CREATE_FLOW, 3868 ib_uverbs_ex_create_flow, 3869 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, 3870 flow_attr, 3871 struct ib_uverbs_create_flow_resp, 3872 flow_handle), 3873 UAPI_DEF_METHOD_NEEDS_FN(create_flow)), 3874 DECLARE_UVERBS_WRITE_EX( 3875 IB_USER_VERBS_EX_CMD_DESTROY_FLOW, 3876 ib_uverbs_ex_destroy_flow, 3877 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), 3878 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), 3879 3880 DECLARE_UVERBS_OBJECT( 3881 UVERBS_OBJECT_MR, 3882 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, 3883 ib_uverbs_dereg_mr, 3884 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), 3885 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), 3886 DECLARE_UVERBS_WRITE( 3887 IB_USER_VERBS_CMD_REG_MR, 3888 ib_uverbs_reg_mr, 3889 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, 3890 struct ib_uverbs_reg_mr_resp), 3891 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), 3892 DECLARE_UVERBS_WRITE( 3893 IB_USER_VERBS_CMD_REREG_MR, 3894 ib_uverbs_rereg_mr, 3895 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, 3896 struct ib_uverbs_rereg_mr_resp), 3897 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), 3898 3899 DECLARE_UVERBS_OBJECT( 3900 UVERBS_OBJECT_MW, 3901 DECLARE_UVERBS_WRITE( 3902 IB_USER_VERBS_CMD_ALLOC_MW, 3903 ib_uverbs_alloc_mw, 3904 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, 3905 struct ib_uverbs_alloc_mw_resp), 3906 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), 3907 DECLARE_UVERBS_WRITE( 3908 IB_USER_VERBS_CMD_DEALLOC_MW, 3909 ib_uverbs_dealloc_mw, 3910 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), 3911 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), 3912 3913 DECLARE_UVERBS_OBJECT( 3914 UVERBS_OBJECT_PD, 3915 DECLARE_UVERBS_WRITE( 3916 IB_USER_VERBS_CMD_ALLOC_PD, 3917 ib_uverbs_alloc_pd, 3918 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, 3919 struct ib_uverbs_alloc_pd_resp), 3920 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), 3921 DECLARE_UVERBS_WRITE( 3922 IB_USER_VERBS_CMD_DEALLOC_PD, 3923 ib_uverbs_dealloc_pd, 3924 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), 3925 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), 3926 3927 DECLARE_UVERBS_OBJECT( 3928 UVERBS_OBJECT_QP, 3929 DECLARE_UVERBS_WRITE( 3930 IB_USER_VERBS_CMD_ATTACH_MCAST, 3931 ib_uverbs_attach_mcast, 3932 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), 3933 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), 3934 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3935 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, 3936 ib_uverbs_create_qp, 3937 UAPI_DEF_WRITE_UDATA_IO( 3938 struct ib_uverbs_create_qp, 3939 struct ib_uverbs_create_qp_resp), 3940 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3941 DECLARE_UVERBS_WRITE( 3942 IB_USER_VERBS_CMD_DESTROY_QP, 3943 ib_uverbs_destroy_qp, 3944 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, 3945 struct ib_uverbs_destroy_qp_resp), 3946 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), 3947 DECLARE_UVERBS_WRITE( 3948 IB_USER_VERBS_CMD_DETACH_MCAST, 3949 ib_uverbs_detach_mcast, 3950 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), 3951 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), 3952 DECLARE_UVERBS_WRITE( 3953 IB_USER_VERBS_CMD_MODIFY_QP, 3954 ib_uverbs_modify_qp, 3955 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), 3956 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), 3957 DECLARE_UVERBS_WRITE( 3958 IB_USER_VERBS_CMD_POST_RECV, 3959 ib_uverbs_post_recv, 3960 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, 3961 struct ib_uverbs_post_recv_resp), 3962 UAPI_DEF_METHOD_NEEDS_FN(post_recv)), 3963 DECLARE_UVERBS_WRITE( 3964 IB_USER_VERBS_CMD_POST_SEND, 3965 ib_uverbs_post_send, 3966 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, 3967 struct ib_uverbs_post_send_resp), 3968 UAPI_DEF_METHOD_NEEDS_FN(post_send)), 3969 DECLARE_UVERBS_WRITE( 3970 IB_USER_VERBS_CMD_QUERY_QP, 3971 ib_uverbs_query_qp, 3972 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, 3973 struct ib_uverbs_query_qp_resp), 3974 UAPI_DEF_METHOD_NEEDS_FN(query_qp)), 3975 DECLARE_UVERBS_WRITE_EX( 3976 IB_USER_VERBS_EX_CMD_CREATE_QP, 3977 ib_uverbs_ex_create_qp, 3978 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, 3979 comp_mask, 3980 struct ib_uverbs_ex_create_qp_resp, 3981 response_length), 3982 UAPI_DEF_METHOD_NEEDS_FN(create_qp)), 3983 DECLARE_UVERBS_WRITE_EX( 3984 IB_USER_VERBS_EX_CMD_MODIFY_QP, 3985 ib_uverbs_ex_modify_qp, 3986 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, 3987 base, 3988 struct ib_uverbs_ex_modify_qp_resp, 3989 response_length), 3990 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), 3991 3992 DECLARE_UVERBS_OBJECT( 3993 UVERBS_OBJECT_RWQ_IND_TBL, 3994 DECLARE_UVERBS_WRITE_EX( 3995 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, 3996 ib_uverbs_ex_create_rwq_ind_table, 3997 UAPI_DEF_WRITE_IO_EX( 3998 struct ib_uverbs_ex_create_rwq_ind_table, 3999 log_ind_tbl_size, 4000 struct ib_uverbs_ex_create_rwq_ind_table_resp, 4001 ind_tbl_num), 4002 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), 4003 DECLARE_UVERBS_WRITE_EX( 4004 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, 4005 ib_uverbs_ex_destroy_rwq_ind_table, 4006 UAPI_DEF_WRITE_I( 4007 struct ib_uverbs_ex_destroy_rwq_ind_table), 4008 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), 4009 4010 DECLARE_UVERBS_OBJECT( 4011 UVERBS_OBJECT_WQ, 4012 DECLARE_UVERBS_WRITE_EX( 4013 IB_USER_VERBS_EX_CMD_CREATE_WQ, 4014 ib_uverbs_ex_create_wq, 4015 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, 4016 max_sge, 4017 struct ib_uverbs_ex_create_wq_resp, 4018 wqn), 4019 UAPI_DEF_METHOD_NEEDS_FN(create_wq)), 4020 DECLARE_UVERBS_WRITE_EX( 4021 IB_USER_VERBS_EX_CMD_DESTROY_WQ, 4022 ib_uverbs_ex_destroy_wq, 4023 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, 4024 wq_handle, 4025 struct ib_uverbs_ex_destroy_wq_resp, 4026 reserved), 4027 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), 4028 DECLARE_UVERBS_WRITE_EX( 4029 IB_USER_VERBS_EX_CMD_MODIFY_WQ, 4030 ib_uverbs_ex_modify_wq, 4031 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, 4032 curr_wq_state), 4033 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), 4034 4035 DECLARE_UVERBS_OBJECT( 4036 UVERBS_OBJECT_SRQ, 4037 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, 4038 ib_uverbs_create_srq, 4039 UAPI_DEF_WRITE_UDATA_IO( 4040 struct ib_uverbs_create_srq, 4041 struct ib_uverbs_create_srq_resp), 4042 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4043 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, 4044 ib_uverbs_create_xsrq, 4045 UAPI_DEF_WRITE_UDATA_IO( 4046 struct ib_uverbs_create_xsrq, 4047 struct ib_uverbs_create_srq_resp), 4048 UAPI_DEF_METHOD_NEEDS_FN(create_srq)), 4049 DECLARE_UVERBS_WRITE( 4050 IB_USER_VERBS_CMD_DESTROY_SRQ, 4051 ib_uverbs_destroy_srq, 4052 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, 4053 struct ib_uverbs_destroy_srq_resp), 4054 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), 4055 DECLARE_UVERBS_WRITE( 4056 IB_USER_VERBS_CMD_MODIFY_SRQ, 4057 ib_uverbs_modify_srq, 4058 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), 4059 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), 4060 DECLARE_UVERBS_WRITE( 4061 IB_USER_VERBS_CMD_POST_SRQ_RECV, 4062 ib_uverbs_post_srq_recv, 4063 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, 4064 struct ib_uverbs_post_srq_recv_resp), 4065 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), 4066 DECLARE_UVERBS_WRITE( 4067 IB_USER_VERBS_CMD_QUERY_SRQ, 4068 ib_uverbs_query_srq, 4069 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, 4070 struct ib_uverbs_query_srq_resp), 4071 UAPI_DEF_METHOD_NEEDS_FN(query_srq))), 4072 4073 DECLARE_UVERBS_OBJECT( 4074 UVERBS_OBJECT_XRCD, 4075 DECLARE_UVERBS_WRITE( 4076 IB_USER_VERBS_CMD_CLOSE_XRCD, 4077 ib_uverbs_close_xrcd, 4078 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd), 4079 UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)), 4080 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, 4081 ib_uverbs_open_qp, 4082 UAPI_DEF_WRITE_UDATA_IO( 4083 struct ib_uverbs_open_qp, 4084 struct ib_uverbs_create_qp_resp)), 4085 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, 4086 ib_uverbs_open_xrcd, 4087 UAPI_DEF_WRITE_UDATA_IO( 4088 struct ib_uverbs_open_xrcd, 4089 struct ib_uverbs_open_xrcd_resp), 4090 UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))), 4091 4092 {}, 4093 }; 4094