1 /* 2 * Copyright (c) 2017, Mellanox Technologies inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #ifndef _UVERBS_IOCTL_ 34 #define _UVERBS_IOCTL_ 35 36 #include <rdma/uverbs_types.h> 37 #include <linux/uaccess.h> 38 #include <rdma/rdma_user_ioctl.h> 39 #include <rdma/ib_user_ioctl_verbs.h> 40 #include <rdma/ib_user_ioctl_cmds.h> 41 42 /* 43 * ======================================= 44 * Verbs action specifications 45 * ======================================= 46 */ 47 48 enum uverbs_attr_type { 49 UVERBS_ATTR_TYPE_NA, 50 UVERBS_ATTR_TYPE_PTR_IN, 51 UVERBS_ATTR_TYPE_PTR_OUT, 52 UVERBS_ATTR_TYPE_IDR, 53 UVERBS_ATTR_TYPE_FD, 54 UVERBS_ATTR_TYPE_ENUM_IN, 55 }; 56 57 enum uverbs_obj_access { 58 UVERBS_ACCESS_READ, 59 UVERBS_ACCESS_WRITE, 60 UVERBS_ACCESS_NEW, 61 UVERBS_ACCESS_DESTROY 62 }; 63 64 /* Specification of a single attribute inside the ioctl message */ 65 /* good size 16 */ 66 struct uverbs_attr_spec { 67 u8 type; 68 69 /* 70 * Support extending attributes by length. Allow the user to provide 71 * more bytes than ptr.len, but check that everything after is zero'd 72 * by the user. 73 */ 74 u8 zero_trailing:1; 75 /* 76 * Valid only for PTR_IN. Allocate and copy the data inside 77 * the parser 78 */ 79 u8 alloc_and_copy:1; 80 u8 mandatory:1; 81 82 union { 83 struct { 84 /* Current known size to kernel */ 85 u16 len; 86 /* User isn't allowed to provide something < min_len */ 87 u16 min_len; 88 } ptr; 89 90 struct { 91 /* 92 * higher bits mean the namespace and lower bits mean 93 * the type id within the namespace. 94 */ 95 u16 obj_type; 96 u8 access; 97 } obj; 98 99 struct { 100 u8 num_elems; 101 } enum_def; 102 } u; 103 104 /* This weird split of the enum lets us remove some padding */ 105 union { 106 struct { 107 /* 108 * The enum attribute can select one of the attributes 109 * contained in the ids array. Currently only PTR_IN 110 * attributes are supported in the ids array. 111 */ 112 const struct uverbs_attr_spec *ids; 113 } enum_def; 114 } u2; 115 }; 116 117 /* 118 * Information about the API is loaded into a radix tree. For IOCTL we start 119 * with a tuple of: 120 * object_id, attr_id, method_id 121 * 122 * Which is a 48 bit value, with most of the bits guaranteed to be zero. Based 123 * on the current kernel support this is compressed into 16 bit key for the 124 * radix tree. Since this compression is entirely internal to the kernel the 125 * below limits can be revised if the kernel gains additional data. 126 * 127 * With 64 leafs per node this is a 3 level radix tree. 128 * 129 * The tree encodes multiple types, and uses a scheme where OBJ_ID,0,0 returns 130 * the object slot, and OBJ_ID,METH_ID,0 and returns the method slot. 131 */ 132 enum uapi_radix_data { 133 UVERBS_API_NS_FLAG = 1U << UVERBS_ID_NS_SHIFT, 134 135 UVERBS_API_ATTR_KEY_BITS = 6, 136 UVERBS_API_ATTR_KEY_MASK = GENMASK(UVERBS_API_ATTR_KEY_BITS - 1, 0), 137 UVERBS_API_ATTR_BKEY_LEN = (1 << UVERBS_API_ATTR_KEY_BITS) - 1, 138 139 UVERBS_API_METHOD_KEY_BITS = 5, 140 UVERBS_API_METHOD_KEY_SHIFT = UVERBS_API_ATTR_KEY_BITS, 141 UVERBS_API_METHOD_KEY_NUM_CORE = 24, 142 UVERBS_API_METHOD_KEY_NUM_DRIVER = (1 << UVERBS_API_METHOD_KEY_BITS) - 143 UVERBS_API_METHOD_KEY_NUM_CORE, 144 UVERBS_API_METHOD_KEY_MASK = GENMASK( 145 UVERBS_API_METHOD_KEY_BITS + UVERBS_API_METHOD_KEY_SHIFT - 1, 146 UVERBS_API_METHOD_KEY_SHIFT), 147 148 UVERBS_API_OBJ_KEY_BITS = 5, 149 UVERBS_API_OBJ_KEY_SHIFT = 150 UVERBS_API_METHOD_KEY_BITS + UVERBS_API_METHOD_KEY_SHIFT, 151 UVERBS_API_OBJ_KEY_NUM_CORE = 24, 152 UVERBS_API_OBJ_KEY_NUM_DRIVER = 153 (1 << UVERBS_API_OBJ_KEY_BITS) - UVERBS_API_OBJ_KEY_NUM_CORE, 154 UVERBS_API_OBJ_KEY_MASK = GENMASK(31, UVERBS_API_OBJ_KEY_SHIFT), 155 156 /* This id guaranteed to not exist in the radix tree */ 157 UVERBS_API_KEY_ERR = 0xFFFFFFFF, 158 }; 159 160 static inline __attribute_const__ u32 uapi_key_obj(u32 id) 161 { 162 if (id & UVERBS_API_NS_FLAG) { 163 id &= ~UVERBS_API_NS_FLAG; 164 if (id >= UVERBS_API_OBJ_KEY_NUM_DRIVER) 165 return UVERBS_API_KEY_ERR; 166 id = id + UVERBS_API_OBJ_KEY_NUM_CORE; 167 } else { 168 if (id >= UVERBS_API_OBJ_KEY_NUM_CORE) 169 return UVERBS_API_KEY_ERR; 170 } 171 172 return id << UVERBS_API_OBJ_KEY_SHIFT; 173 } 174 175 static inline __attribute_const__ bool uapi_key_is_object(u32 key) 176 { 177 return (key & ~UVERBS_API_OBJ_KEY_MASK) == 0; 178 } 179 180 static inline __attribute_const__ u32 uapi_key_ioctl_method(u32 id) 181 { 182 if (id & UVERBS_API_NS_FLAG) { 183 id &= ~UVERBS_API_NS_FLAG; 184 if (id >= UVERBS_API_METHOD_KEY_NUM_DRIVER) 185 return UVERBS_API_KEY_ERR; 186 id = id + UVERBS_API_METHOD_KEY_NUM_CORE; 187 } else { 188 id++; 189 if (id >= UVERBS_API_METHOD_KEY_NUM_CORE) 190 return UVERBS_API_KEY_ERR; 191 } 192 193 return id << UVERBS_API_METHOD_KEY_SHIFT; 194 } 195 196 static inline __attribute_const__ u32 uapi_key_attr_to_method(u32 attr_key) 197 { 198 return attr_key & 199 (UVERBS_API_OBJ_KEY_MASK | UVERBS_API_METHOD_KEY_MASK); 200 } 201 202 static inline __attribute_const__ bool uapi_key_is_ioctl_method(u32 key) 203 { 204 return (key & UVERBS_API_METHOD_KEY_MASK) != 0 && 205 (key & UVERBS_API_ATTR_KEY_MASK) == 0; 206 } 207 208 static inline __attribute_const__ u32 uapi_key_attrs_start(u32 ioctl_method_key) 209 { 210 /* 0 is the method slot itself */ 211 return ioctl_method_key + 1; 212 } 213 214 static inline __attribute_const__ u32 uapi_key_attr(u32 id) 215 { 216 /* 217 * The attr is designed to fit in the typical single radix tree node 218 * of 64 entries. Since allmost all methods have driver attributes we 219 * organize things so that the driver and core attributes interleave to 220 * reduce the length of the attributes array in typical cases. 221 */ 222 if (id & UVERBS_API_NS_FLAG) { 223 id &= ~UVERBS_API_NS_FLAG; 224 id++; 225 if (id >= 1 << (UVERBS_API_ATTR_KEY_BITS - 1)) 226 return UVERBS_API_KEY_ERR; 227 id = (id << 1) | 0; 228 } else { 229 if (id >= 1 << (UVERBS_API_ATTR_KEY_BITS - 1)) 230 return UVERBS_API_KEY_ERR; 231 id = (id << 1) | 1; 232 } 233 234 return id; 235 } 236 237 static inline __attribute_const__ bool uapi_key_is_attr(u32 key) 238 { 239 return (key & UVERBS_API_METHOD_KEY_MASK) != 0 && 240 (key & UVERBS_API_ATTR_KEY_MASK) != 0; 241 } 242 243 /* 244 * This returns a value in the range [0 to UVERBS_API_ATTR_BKEY_LEN), 245 * basically it undoes the reservation of 0 in the ID numbering. attr_key 246 * must already be masked with UVERBS_API_ATTR_KEY_MASK, or be the output of 247 * uapi_key_attr(). 248 */ 249 static inline __attribute_const__ u32 uapi_bkey_attr(u32 attr_key) 250 { 251 return attr_key - 1; 252 } 253 254 /* 255 * ======================================= 256 * Verbs definitions 257 * ======================================= 258 */ 259 260 struct uverbs_attr_def { 261 u16 id; 262 struct uverbs_attr_spec attr; 263 }; 264 265 struct uverbs_method_def { 266 u16 id; 267 /* Combination of bits from enum UVERBS_ACTION_FLAG_XXXX */ 268 u32 flags; 269 size_t num_attrs; 270 const struct uverbs_attr_def * const (*attrs)[]; 271 int (*handler)(struct ib_uverbs_file *ufile, 272 struct uverbs_attr_bundle *ctx); 273 }; 274 275 struct uverbs_object_def { 276 u16 id; 277 const struct uverbs_obj_type *type_attrs; 278 size_t num_methods; 279 const struct uverbs_method_def * const (*methods)[]; 280 }; 281 282 struct uverbs_object_tree_def { 283 size_t num_objects; 284 const struct uverbs_object_def * const (*objects)[]; 285 }; 286 287 /* 288 * ======================================= 289 * Attribute Specifications 290 * ======================================= 291 */ 292 293 #define UVERBS_ATTR_SIZE(_min_len, _len) \ 294 .u.ptr.min_len = _min_len, .u.ptr.len = _len 295 296 #define UVERBS_ATTR_NO_DATA() UVERBS_ATTR_SIZE(0, 0) 297 298 /* 299 * Specifies a uapi structure that cannot be extended. The user must always 300 * supply the whole structure and nothing more. The structure must be declared 301 * in a header under include/uapi/rdma. 302 */ 303 #define UVERBS_ATTR_TYPE(_type) \ 304 .u.ptr.min_len = sizeof(_type), .u.ptr.len = sizeof(_type) 305 /* 306 * Specifies a uapi structure where the user must provide at least up to 307 * member 'last'. Anything after last and up until the end of the structure 308 * can be non-zero, anything longer than the end of the structure must be 309 * zero. The structure must be declared in a header under include/uapi/rdma. 310 */ 311 #define UVERBS_ATTR_STRUCT(_type, _last) \ 312 .zero_trailing = 1, \ 313 UVERBS_ATTR_SIZE(((uintptr_t)(&((_type *)0)->_last + 1)), \ 314 sizeof(_type)) 315 /* 316 * Specifies at least min_len bytes must be passed in, but the amount can be 317 * larger, up to the protocol maximum size. No check for zeroing is done. 318 */ 319 #define UVERBS_ATTR_MIN_SIZE(_min_len) UVERBS_ATTR_SIZE(_min_len, USHRT_MAX) 320 321 /* Must be used in the '...' of any UVERBS_ATTR */ 322 #define UA_ALLOC_AND_COPY .alloc_and_copy = 1 323 #define UA_MANDATORY .mandatory = 1 324 #define UA_OPTIONAL .mandatory = 0 325 326 #define UVERBS_ATTR_IDR(_attr_id, _idr_type, _access, ...) \ 327 (&(const struct uverbs_attr_def){ \ 328 .id = _attr_id, \ 329 .attr = { .type = UVERBS_ATTR_TYPE_IDR, \ 330 .u.obj.obj_type = _idr_type, \ 331 .u.obj.access = _access, \ 332 __VA_ARGS__ } }) 333 334 #define UVERBS_ATTR_FD(_attr_id, _fd_type, _access, ...) \ 335 (&(const struct uverbs_attr_def){ \ 336 .id = (_attr_id) + \ 337 BUILD_BUG_ON_ZERO((_access) != UVERBS_ACCESS_NEW && \ 338 (_access) != UVERBS_ACCESS_READ), \ 339 .attr = { .type = UVERBS_ATTR_TYPE_FD, \ 340 .u.obj.obj_type = _fd_type, \ 341 .u.obj.access = _access, \ 342 __VA_ARGS__ } }) 343 344 #define UVERBS_ATTR_PTR_IN(_attr_id, _type, ...) \ 345 (&(const struct uverbs_attr_def){ \ 346 .id = _attr_id, \ 347 .attr = { .type = UVERBS_ATTR_TYPE_PTR_IN, \ 348 _type, \ 349 __VA_ARGS__ } }) 350 351 #define UVERBS_ATTR_PTR_OUT(_attr_id, _type, ...) \ 352 (&(const struct uverbs_attr_def){ \ 353 .id = _attr_id, \ 354 .attr = { .type = UVERBS_ATTR_TYPE_PTR_OUT, \ 355 _type, \ 356 __VA_ARGS__ } }) 357 358 /* _enum_arry should be a 'static const union uverbs_attr_spec[]' */ 359 #define UVERBS_ATTR_ENUM_IN(_attr_id, _enum_arr, ...) \ 360 (&(const struct uverbs_attr_def){ \ 361 .id = _attr_id, \ 362 .attr = { .type = UVERBS_ATTR_TYPE_ENUM_IN, \ 363 .u2.enum_def.ids = _enum_arr, \ 364 .u.enum_def.num_elems = ARRAY_SIZE(_enum_arr), \ 365 __VA_ARGS__ }, \ 366 }) 367 368 /* 369 * An input value that is a bitwise combination of values of _enum_type. 370 * This permits the flag value to be passed as either a u32 or u64, it must 371 * be retrieved via uverbs_get_flag(). 372 */ 373 #define UVERBS_ATTR_FLAGS_IN(_attr_id, _enum_type, ...) \ 374 UVERBS_ATTR_PTR_IN( \ 375 _attr_id, \ 376 UVERBS_ATTR_SIZE(sizeof(u32) + BUILD_BUG_ON_ZERO( \ 377 !sizeof(_enum_type *)), \ 378 sizeof(u64)), \ 379 __VA_ARGS__) 380 381 /* 382 * This spec is used in order to pass information to the hardware driver in a 383 * legacy way. Every verb that could get driver specific data should get this 384 * spec. 385 */ 386 #define UVERBS_ATTR_UHW() \ 387 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_UHW_IN, \ 388 UVERBS_ATTR_MIN_SIZE(0), \ 389 UA_OPTIONAL), \ 390 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_UHW_OUT, \ 391 UVERBS_ATTR_MIN_SIZE(0), \ 392 UA_OPTIONAL) 393 394 /* 395 * ======================================= 396 * Declaration helpers 397 * ======================================= 398 */ 399 400 #define DECLARE_UVERBS_OBJECT_TREE(_name, ...) \ 401 static const struct uverbs_object_def *const _name##_ptr[] = { \ 402 __VA_ARGS__, \ 403 }; \ 404 static const struct uverbs_object_tree_def _name = { \ 405 .num_objects = ARRAY_SIZE(_name##_ptr), \ 406 .objects = &_name##_ptr, \ 407 } 408 409 /* ================================================= 410 * Parsing infrastructure 411 * ================================================= 412 */ 413 414 415 struct uverbs_ptr_attr { 416 /* 417 * If UVERBS_ATTR_SPEC_F_ALLOC_AND_COPY is set then the 'ptr' is 418 * used. 419 */ 420 union { 421 void *ptr; 422 u64 data; 423 }; 424 u16 len; 425 u16 uattr_idx; 426 u8 enum_id; 427 }; 428 429 struct uverbs_obj_attr { 430 struct ib_uobject *uobject; 431 const struct uverbs_api_attr *attr_elm; 432 }; 433 434 struct uverbs_attr { 435 union { 436 struct uverbs_ptr_attr ptr_attr; 437 struct uverbs_obj_attr obj_attr; 438 }; 439 }; 440 441 struct uverbs_attr_bundle { 442 struct ib_uverbs_file *ufile; 443 DECLARE_BITMAP(attr_present, UVERBS_API_ATTR_BKEY_LEN); 444 struct uverbs_attr attrs[]; 445 }; 446 447 static inline bool uverbs_attr_is_valid(const struct uverbs_attr_bundle *attrs_bundle, 448 unsigned int idx) 449 { 450 return test_bit(uapi_bkey_attr(uapi_key_attr(idx)), 451 attrs_bundle->attr_present); 452 } 453 454 #define IS_UVERBS_COPY_ERR(_ret) ((_ret) && (_ret) != -ENOENT) 455 456 static inline const struct uverbs_attr *uverbs_attr_get(const struct uverbs_attr_bundle *attrs_bundle, 457 u16 idx) 458 { 459 if (!uverbs_attr_is_valid(attrs_bundle, idx)) 460 return ERR_PTR(-ENOENT); 461 462 return &attrs_bundle->attrs[uapi_bkey_attr(uapi_key_attr(idx))]; 463 } 464 465 static inline int uverbs_attr_get_enum_id(const struct uverbs_attr_bundle *attrs_bundle, 466 u16 idx) 467 { 468 const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); 469 470 if (IS_ERR(attr)) 471 return PTR_ERR(attr); 472 473 return attr->ptr_attr.enum_id; 474 } 475 476 static inline void *uverbs_attr_get_obj(const struct uverbs_attr_bundle *attrs_bundle, 477 u16 idx) 478 { 479 const struct uverbs_attr *attr; 480 481 attr = uverbs_attr_get(attrs_bundle, idx); 482 if (IS_ERR(attr)) 483 return ERR_CAST(attr); 484 485 return attr->obj_attr.uobject->object; 486 } 487 488 static inline struct ib_uobject *uverbs_attr_get_uobject(const struct uverbs_attr_bundle *attrs_bundle, 489 u16 idx) 490 { 491 const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); 492 493 if (IS_ERR(attr)) 494 return ERR_CAST(attr); 495 496 return attr->obj_attr.uobject; 497 } 498 499 static inline int 500 uverbs_attr_get_len(const struct uverbs_attr_bundle *attrs_bundle, u16 idx) 501 { 502 const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); 503 504 if (IS_ERR(attr)) 505 return PTR_ERR(attr); 506 507 return attr->ptr_attr.len; 508 } 509 510 static inline bool uverbs_attr_ptr_is_inline(const struct uverbs_attr *attr) 511 { 512 return attr->ptr_attr.len <= sizeof(attr->ptr_attr.data); 513 } 514 515 static inline void *uverbs_attr_get_alloced_ptr( 516 const struct uverbs_attr_bundle *attrs_bundle, u16 idx) 517 { 518 const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); 519 520 if (IS_ERR(attr)) 521 return (void *)attr; 522 523 return uverbs_attr_ptr_is_inline(attr) ? (void *)&attr->ptr_attr.data : 524 attr->ptr_attr.ptr; 525 } 526 527 static inline int _uverbs_copy_from(void *to, 528 const struct uverbs_attr_bundle *attrs_bundle, 529 size_t idx, 530 size_t size) 531 { 532 const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); 533 534 if (IS_ERR(attr)) 535 return PTR_ERR(attr); 536 537 /* 538 * Validation ensures attr->ptr_attr.len >= size. If the caller is 539 * using UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO then it must call 540 * uverbs_copy_from_or_zero. 541 */ 542 if (unlikely(size < attr->ptr_attr.len)) 543 return -EINVAL; 544 545 if (uverbs_attr_ptr_is_inline(attr)) 546 memcpy(to, &attr->ptr_attr.data, attr->ptr_attr.len); 547 else if (copy_from_user(to, u64_to_user_ptr(attr->ptr_attr.data), 548 attr->ptr_attr.len)) 549 return -EFAULT; 550 551 return 0; 552 } 553 554 static inline int _uverbs_copy_from_or_zero(void *to, 555 const struct uverbs_attr_bundle *attrs_bundle, 556 size_t idx, 557 size_t size) 558 { 559 const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); 560 size_t min_size; 561 562 if (IS_ERR(attr)) 563 return PTR_ERR(attr); 564 565 min_size = min_t(size_t, size, attr->ptr_attr.len); 566 567 if (uverbs_attr_ptr_is_inline(attr)) 568 memcpy(to, &attr->ptr_attr.data, min_size); 569 else if (copy_from_user(to, u64_to_user_ptr(attr->ptr_attr.data), 570 min_size)) 571 return -EFAULT; 572 573 if (size > min_size) 574 memset(to + min_size, 0, size - min_size); 575 576 return 0; 577 } 578 579 #define uverbs_copy_from(to, attrs_bundle, idx) \ 580 _uverbs_copy_from(to, attrs_bundle, idx, sizeof(*to)) 581 582 #define uverbs_copy_from_or_zero(to, attrs_bundle, idx) \ 583 _uverbs_copy_from_or_zero(to, attrs_bundle, idx, sizeof(*to)) 584 585 #if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS) 586 int uverbs_get_flags64(u64 *to, const struct uverbs_attr_bundle *attrs_bundle, 587 size_t idx, u64 allowed_bits); 588 int uverbs_get_flags32(u32 *to, const struct uverbs_attr_bundle *attrs_bundle, 589 size_t idx, u64 allowed_bits); 590 int uverbs_copy_to(const struct uverbs_attr_bundle *attrs_bundle, size_t idx, 591 const void *from, size_t size); 592 __malloc void *_uverbs_alloc(struct uverbs_attr_bundle *bundle, size_t size, 593 gfp_t flags); 594 595 static inline __malloc void *uverbs_alloc(struct uverbs_attr_bundle *bundle, 596 size_t size) 597 { 598 return _uverbs_alloc(bundle, size, GFP_KERNEL); 599 } 600 601 static inline __malloc void *uverbs_zalloc(struct uverbs_attr_bundle *bundle, 602 size_t size) 603 { 604 return _uverbs_alloc(bundle, size, GFP_KERNEL | __GFP_ZERO); 605 } 606 #else 607 static inline int 608 uverbs_get_flags64(u64 *to, const struct uverbs_attr_bundle *attrs_bundle, 609 size_t idx, u64 allowed_bits) 610 { 611 return -EINVAL; 612 } 613 static inline int 614 uverbs_get_flags32(u32 *to, const struct uverbs_attr_bundle *attrs_bundle, 615 size_t idx, u64 allowed_bits) 616 { 617 return -EINVAL; 618 } 619 static inline int uverbs_copy_to(const struct uverbs_attr_bundle *attrs_bundle, 620 size_t idx, const void *from, size_t size) 621 { 622 return -EINVAL; 623 } 624 static inline __malloc void *uverbs_alloc(struct uverbs_attr_bundle *bundle, 625 size_t size) 626 { 627 return ERR_PTR(-EINVAL); 628 } 629 static inline __malloc void *uverbs_zalloc(struct uverbs_attr_bundle *bundle, 630 size_t size) 631 { 632 return ERR_PTR(-EINVAL); 633 } 634 #endif 635 636 #endif 637