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6bf9d8f6 | 1 | /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ |
a0aa309c MB |
2 | /* |
3 | * Copyright (c) 2017, Mellanox Technologies inc. All rights reserved. | |
a0aa309c MB |
4 | */ |
5 | ||
6 | #ifndef _UVERBS_IOCTL_ | |
7 | #define _UVERBS_IOCTL_ | |
8 | ||
9 | #include <rdma/uverbs_types.h> | |
35410306 MB |
10 | #include <linux/uaccess.h> |
11 | #include <rdma/rdma_user_ioctl.h> | |
d70724f1 | 12 | #include <rdma/ib_user_ioctl_verbs.h> |
1f7ff9d5 | 13 | #include <rdma/ib_user_ioctl_cmds.h> |
a0aa309c MB |
14 | |
15 | /* | |
16 | * ======================================= | |
17 | * Verbs action specifications | |
18 | * ======================================= | |
19 | */ | |
20 | ||
f43dbebf MB |
21 | enum uverbs_attr_type { |
22 | UVERBS_ATTR_TYPE_NA, | |
fac9658c MB |
23 | UVERBS_ATTR_TYPE_PTR_IN, |
24 | UVERBS_ATTR_TYPE_PTR_OUT, | |
f43dbebf MB |
25 | UVERBS_ATTR_TYPE_IDR, |
26 | UVERBS_ATTR_TYPE_FD, | |
494c5580 | 27 | UVERBS_ATTR_TYPE_ENUM_IN, |
70cd20ae | 28 | UVERBS_ATTR_TYPE_IDRS_ARRAY, |
f43dbebf MB |
29 | }; |
30 | ||
a0aa309c MB |
31 | enum uverbs_obj_access { |
32 | UVERBS_ACCESS_READ, | |
33 | UVERBS_ACCESS_WRITE, | |
34 | UVERBS_ACCESS_NEW, | |
35 | UVERBS_ACCESS_DESTROY | |
36 | }; | |
37 | ||
1f07e08f | 38 | /* Specification of a single attribute inside the ioctl message */ |
83bb4442 | 39 | /* good size 16 */ |
f43dbebf | 40 | struct uverbs_attr_spec { |
d108dac0 | 41 | u8 type; |
83bb4442 JG |
42 | |
43 | /* | |
422e3d37 JG |
44 | * Support extending attributes by length. Allow the user to provide |
45 | * more bytes than ptr.len, but check that everything after is zero'd | |
46 | * by the user. | |
83bb4442 | 47 | */ |
422e3d37 | 48 | u8 zero_trailing:1; |
83bb4442 JG |
49 | /* |
50 | * Valid only for PTR_IN. Allocate and copy the data inside | |
51 | * the parser | |
52 | */ | |
53 | u8 alloc_and_copy:1; | |
54 | u8 mandatory:1; | |
07f05f40 JG |
55 | /* True if this is from UVERBS_ATTR_UHW */ |
56 | u8 is_udata:1; | |
d108dac0 | 57 | |
fac9658c | 58 | union { |
1f07e08f | 59 | struct { |
c66db311 | 60 | /* Current known size to kernel */ |
d108dac0 | 61 | u16 len; |
c66db311 | 62 | /* User isn't allowed to provide something < min_len */ |
d108dac0 | 63 | u16 min_len; |
1f07e08f | 64 | } ptr; |
d108dac0 | 65 | |
1f07e08f | 66 | struct { |
fac9658c MB |
67 | /* |
68 | * higher bits mean the namespace and lower bits mean | |
69 | * the type id within the namespace. | |
70 | */ | |
d108dac0 JG |
71 | u16 obj_type; |
72 | u8 access; | |
fac9658c | 73 | } obj; |
d108dac0 JG |
74 | |
75 | struct { | |
76 | u8 num_elems; | |
77 | } enum_def; | |
78 | } u; | |
79 | ||
70cd20ae | 80 | /* This weird split lets us remove some padding */ |
d108dac0 | 81 | union { |
494c5580 | 82 | struct { |
494c5580 MB |
83 | /* |
84 | * The enum attribute can select one of the attributes | |
85 | * contained in the ids array. Currently only PTR_IN | |
86 | * attributes are supported in the ids array. | |
87 | */ | |
d108dac0 | 88 | const struct uverbs_attr_spec *ids; |
494c5580 | 89 | } enum_def; |
70cd20ae GL |
90 | |
91 | struct { | |
92 | /* | |
93 | * higher bits mean the namespace and lower bits mean | |
94 | * the type id within the namespace. | |
95 | */ | |
96 | u16 obj_type; | |
97 | u16 min_len; | |
98 | u16 max_len; | |
99 | u8 access; | |
100 | } objs_arr; | |
d108dac0 | 101 | } u2; |
f43dbebf MB |
102 | }; |
103 | ||
9ed3e5f4 JG |
104 | /* |
105 | * Information about the API is loaded into a radix tree. For IOCTL we start | |
106 | * with a tuple of: | |
107 | * object_id, attr_id, method_id | |
108 | * | |
109 | * Which is a 48 bit value, with most of the bits guaranteed to be zero. Based | |
110 | * on the current kernel support this is compressed into 16 bit key for the | |
111 | * radix tree. Since this compression is entirely internal to the kernel the | |
112 | * below limits can be revised if the kernel gains additional data. | |
113 | * | |
114 | * With 64 leafs per node this is a 3 level radix tree. | |
115 | * | |
116 | * The tree encodes multiple types, and uses a scheme where OBJ_ID,0,0 returns | |
117 | * the object slot, and OBJ_ID,METH_ID,0 and returns the method slot. | |
6884c6c4 JG |
118 | * |
119 | * This also encodes the tables for the write() and write() extended commands | |
120 | * using the coding | |
121 | * OBJ_ID,UVERBS_API_METHOD_IS_WRITE,command # | |
122 | * OBJ_ID,UVERBS_API_METHOD_IS_WRITE_EX,command_ex # | |
123 | * ie the WRITE path is treated as a special method type in the ioctl | |
124 | * framework. | |
9ed3e5f4 JG |
125 | */ |
126 | enum uapi_radix_data { | |
127 | UVERBS_API_NS_FLAG = 1U << UVERBS_ID_NS_SHIFT, | |
128 | ||
129 | UVERBS_API_ATTR_KEY_BITS = 6, | |
130 | UVERBS_API_ATTR_KEY_MASK = GENMASK(UVERBS_API_ATTR_KEY_BITS - 1, 0), | |
131 | UVERBS_API_ATTR_BKEY_LEN = (1 << UVERBS_API_ATTR_KEY_BITS) - 1, | |
6884c6c4 | 132 | UVERBS_API_WRITE_KEY_NUM = 1 << UVERBS_API_ATTR_KEY_BITS, |
9ed3e5f4 JG |
133 | |
134 | UVERBS_API_METHOD_KEY_BITS = 5, | |
135 | UVERBS_API_METHOD_KEY_SHIFT = UVERBS_API_ATTR_KEY_BITS, | |
6884c6c4 JG |
136 | UVERBS_API_METHOD_KEY_NUM_CORE = 22, |
137 | UVERBS_API_METHOD_IS_WRITE = 30 << UVERBS_API_METHOD_KEY_SHIFT, | |
138 | UVERBS_API_METHOD_IS_WRITE_EX = 31 << UVERBS_API_METHOD_KEY_SHIFT, | |
139 | UVERBS_API_METHOD_KEY_NUM_DRIVER = | |
140 | (UVERBS_API_METHOD_IS_WRITE >> UVERBS_API_METHOD_KEY_SHIFT) - | |
141 | UVERBS_API_METHOD_KEY_NUM_CORE, | |
9ed3e5f4 JG |
142 | UVERBS_API_METHOD_KEY_MASK = GENMASK( |
143 | UVERBS_API_METHOD_KEY_BITS + UVERBS_API_METHOD_KEY_SHIFT - 1, | |
144 | UVERBS_API_METHOD_KEY_SHIFT), | |
145 | ||
146 | UVERBS_API_OBJ_KEY_BITS = 5, | |
147 | UVERBS_API_OBJ_KEY_SHIFT = | |
148 | UVERBS_API_METHOD_KEY_BITS + UVERBS_API_METHOD_KEY_SHIFT, | |
342ee59d | 149 | UVERBS_API_OBJ_KEY_NUM_CORE = 20, |
9ed3e5f4 JG |
150 | UVERBS_API_OBJ_KEY_NUM_DRIVER = |
151 | (1 << UVERBS_API_OBJ_KEY_BITS) - UVERBS_API_OBJ_KEY_NUM_CORE, | |
152 | UVERBS_API_OBJ_KEY_MASK = GENMASK(31, UVERBS_API_OBJ_KEY_SHIFT), | |
153 | ||
154 | /* This id guaranteed to not exist in the radix tree */ | |
155 | UVERBS_API_KEY_ERR = 0xFFFFFFFF, | |
156 | }; | |
157 | ||
158 | static inline __attribute_const__ u32 uapi_key_obj(u32 id) | |
159 | { | |
160 | if (id & UVERBS_API_NS_FLAG) { | |
161 | id &= ~UVERBS_API_NS_FLAG; | |
162 | if (id >= UVERBS_API_OBJ_KEY_NUM_DRIVER) | |
163 | return UVERBS_API_KEY_ERR; | |
164 | id = id + UVERBS_API_OBJ_KEY_NUM_CORE; | |
165 | } else { | |
166 | if (id >= UVERBS_API_OBJ_KEY_NUM_CORE) | |
167 | return UVERBS_API_KEY_ERR; | |
168 | } | |
169 | ||
170 | return id << UVERBS_API_OBJ_KEY_SHIFT; | |
171 | } | |
172 | ||
173 | static inline __attribute_const__ bool uapi_key_is_object(u32 key) | |
174 | { | |
175 | return (key & ~UVERBS_API_OBJ_KEY_MASK) == 0; | |
176 | } | |
177 | ||
178 | static inline __attribute_const__ u32 uapi_key_ioctl_method(u32 id) | |
179 | { | |
180 | if (id & UVERBS_API_NS_FLAG) { | |
181 | id &= ~UVERBS_API_NS_FLAG; | |
182 | if (id >= UVERBS_API_METHOD_KEY_NUM_DRIVER) | |
183 | return UVERBS_API_KEY_ERR; | |
184 | id = id + UVERBS_API_METHOD_KEY_NUM_CORE; | |
185 | } else { | |
186 | id++; | |
187 | if (id >= UVERBS_API_METHOD_KEY_NUM_CORE) | |
188 | return UVERBS_API_KEY_ERR; | |
189 | } | |
190 | ||
191 | return id << UVERBS_API_METHOD_KEY_SHIFT; | |
192 | } | |
193 | ||
6884c6c4 JG |
194 | static inline __attribute_const__ u32 uapi_key_write_method(u32 id) |
195 | { | |
196 | if (id >= UVERBS_API_WRITE_KEY_NUM) | |
197 | return UVERBS_API_KEY_ERR; | |
198 | return UVERBS_API_METHOD_IS_WRITE | id; | |
199 | } | |
200 | ||
201 | static inline __attribute_const__ u32 uapi_key_write_ex_method(u32 id) | |
202 | { | |
203 | if (id >= UVERBS_API_WRITE_KEY_NUM) | |
204 | return UVERBS_API_KEY_ERR; | |
205 | return UVERBS_API_METHOD_IS_WRITE_EX | id; | |
206 | } | |
207 | ||
208 | static inline __attribute_const__ u32 | |
209 | uapi_key_attr_to_ioctl_method(u32 attr_key) | |
9ed3e5f4 JG |
210 | { |
211 | return attr_key & | |
212 | (UVERBS_API_OBJ_KEY_MASK | UVERBS_API_METHOD_KEY_MASK); | |
213 | } | |
214 | ||
215 | static inline __attribute_const__ bool uapi_key_is_ioctl_method(u32 key) | |
216 | { | |
6884c6c4 JG |
217 | unsigned int method = key & UVERBS_API_METHOD_KEY_MASK; |
218 | ||
219 | return method != 0 && method < UVERBS_API_METHOD_IS_WRITE && | |
9ed3e5f4 JG |
220 | (key & UVERBS_API_ATTR_KEY_MASK) == 0; |
221 | } | |
222 | ||
6884c6c4 JG |
223 | static inline __attribute_const__ bool uapi_key_is_write_method(u32 key) |
224 | { | |
225 | return (key & UVERBS_API_METHOD_KEY_MASK) == UVERBS_API_METHOD_IS_WRITE; | |
226 | } | |
227 | ||
228 | static inline __attribute_const__ bool uapi_key_is_write_ex_method(u32 key) | |
229 | { | |
230 | return (key & UVERBS_API_METHOD_KEY_MASK) == | |
231 | UVERBS_API_METHOD_IS_WRITE_EX; | |
232 | } | |
233 | ||
9ed3e5f4 JG |
234 | static inline __attribute_const__ u32 uapi_key_attrs_start(u32 ioctl_method_key) |
235 | { | |
236 | /* 0 is the method slot itself */ | |
237 | return ioctl_method_key + 1; | |
238 | } | |
239 | ||
240 | static inline __attribute_const__ u32 uapi_key_attr(u32 id) | |
241 | { | |
242 | /* | |
243 | * The attr is designed to fit in the typical single radix tree node | |
244 | * of 64 entries. Since allmost all methods have driver attributes we | |
245 | * organize things so that the driver and core attributes interleave to | |
246 | * reduce the length of the attributes array in typical cases. | |
247 | */ | |
248 | if (id & UVERBS_API_NS_FLAG) { | |
249 | id &= ~UVERBS_API_NS_FLAG; | |
250 | id++; | |
251 | if (id >= 1 << (UVERBS_API_ATTR_KEY_BITS - 1)) | |
252 | return UVERBS_API_KEY_ERR; | |
253 | id = (id << 1) | 0; | |
254 | } else { | |
255 | if (id >= 1 << (UVERBS_API_ATTR_KEY_BITS - 1)) | |
256 | return UVERBS_API_KEY_ERR; | |
257 | id = (id << 1) | 1; | |
258 | } | |
259 | ||
260 | return id; | |
261 | } | |
262 | ||
6884c6c4 | 263 | /* Only true for ioctl methods */ |
9ed3e5f4 JG |
264 | static inline __attribute_const__ bool uapi_key_is_attr(u32 key) |
265 | { | |
6884c6c4 JG |
266 | unsigned int method = key & UVERBS_API_METHOD_KEY_MASK; |
267 | ||
268 | return method != 0 && method < UVERBS_API_METHOD_IS_WRITE && | |
9ed3e5f4 JG |
269 | (key & UVERBS_API_ATTR_KEY_MASK) != 0; |
270 | } | |
271 | ||
272 | /* | |
273 | * This returns a value in the range [0 to UVERBS_API_ATTR_BKEY_LEN), | |
274 | * basically it undoes the reservation of 0 in the ID numbering. attr_key | |
275 | * must already be masked with UVERBS_API_ATTR_KEY_MASK, or be the output of | |
276 | * uapi_key_attr(). | |
277 | */ | |
278 | static inline __attribute_const__ u32 uapi_bkey_attr(u32 attr_key) | |
279 | { | |
280 | return attr_key - 1; | |
281 | } | |
282 | ||
70cd20ae GL |
283 | static inline __attribute_const__ u32 uapi_bkey_to_key_attr(u32 attr_bkey) |
284 | { | |
285 | return attr_bkey + 1; | |
286 | } | |
287 | ||
5009010f MB |
288 | /* |
289 | * ======================================= | |
290 | * Verbs definitions | |
291 | * ======================================= | |
292 | */ | |
293 | ||
09e3ebf8 MB |
294 | struct uverbs_attr_def { |
295 | u16 id; | |
296 | struct uverbs_attr_spec attr; | |
297 | }; | |
298 | ||
299 | struct uverbs_method_def { | |
300 | u16 id; | |
301 | /* Combination of bits from enum UVERBS_ACTION_FLAG_XXXX */ | |
302 | u32 flags; | |
303 | size_t num_attrs; | |
304 | const struct uverbs_attr_def * const (*attrs)[]; | |
15a1b4be | 305 | int (*handler)(struct uverbs_attr_bundle *attrs); |
09e3ebf8 MB |
306 | }; |
307 | ||
5009010f | 308 | struct uverbs_object_def { |
09e3ebf8 | 309 | u16 id; |
5009010f | 310 | const struct uverbs_obj_type *type_attrs; |
09e3ebf8 MB |
311 | size_t num_methods; |
312 | const struct uverbs_method_def * const (*methods)[]; | |
313 | }; | |
314 | ||
0cbf432d JG |
315 | enum uapi_definition_kind { |
316 | UAPI_DEF_END = 0, | |
6884c6c4 JG |
317 | UAPI_DEF_OBJECT_START, |
318 | UAPI_DEF_WRITE, | |
0cbf432d JG |
319 | UAPI_DEF_CHAIN_OBJ_TREE, |
320 | UAPI_DEF_CHAIN, | |
6829c1c2 JG |
321 | UAPI_DEF_IS_SUPPORTED_FUNC, |
322 | UAPI_DEF_IS_SUPPORTED_DEV_FN, | |
323 | }; | |
324 | ||
325 | enum uapi_definition_scope { | |
326 | UAPI_SCOPE_OBJECT = 1, | |
a140692a | 327 | UAPI_SCOPE_METHOD = 2, |
5009010f MB |
328 | }; |
329 | ||
0cbf432d JG |
330 | struct uapi_definition { |
331 | u8 kind; | |
6829c1c2 | 332 | u8 scope; |
0cbf432d JG |
333 | union { |
334 | struct { | |
335 | u16 object_id; | |
336 | } object_start; | |
6884c6c4 | 337 | struct { |
6884c6c4 | 338 | u16 command_num; |
669dac1e JG |
339 | u8 is_ex:1; |
340 | u8 has_udata:1; | |
341 | u8 has_resp:1; | |
342 | u8 req_size; | |
343 | u8 resp_size; | |
6884c6c4 | 344 | } write; |
0cbf432d JG |
345 | }; |
346 | ||
347 | union { | |
6829c1c2 | 348 | bool (*func_is_supported)(struct ib_device *device); |
974d6b4b | 349 | int (*func_write)(struct uverbs_attr_bundle *attrs); |
0cbf432d JG |
350 | const struct uapi_definition *chain; |
351 | const struct uverbs_object_def *chain_obj_tree; | |
6829c1c2 | 352 | size_t needs_fn_offset; |
0cbf432d JG |
353 | }; |
354 | }; | |
355 | ||
6884c6c4 JG |
356 | /* Define things connected to object_id */ |
357 | #define DECLARE_UVERBS_OBJECT(_object_id, ...) \ | |
358 | { \ | |
359 | .kind = UAPI_DEF_OBJECT_START, \ | |
360 | .object_start = { .object_id = _object_id }, \ | |
361 | }, \ | |
362 | ##__VA_ARGS__ | |
363 | ||
364 | /* Use in a var_args of DECLARE_UVERBS_OBJECT */ | |
669dac1e | 365 | #define DECLARE_UVERBS_WRITE(_command_num, _func, _cmd_desc, ...) \ |
6884c6c4 JG |
366 | { \ |
367 | .kind = UAPI_DEF_WRITE, \ | |
368 | .scope = UAPI_SCOPE_OBJECT, \ | |
369 | .write = { .is_ex = 0, .command_num = _command_num }, \ | |
370 | .func_write = _func, \ | |
669dac1e | 371 | _cmd_desc, \ |
6884c6c4 JG |
372 | }, \ |
373 | ##__VA_ARGS__ | |
374 | ||
375 | /* Use in a var_args of DECLARE_UVERBS_OBJECT */ | |
669dac1e | 376 | #define DECLARE_UVERBS_WRITE_EX(_command_num, _func, _cmd_desc, ...) \ |
6884c6c4 JG |
377 | { \ |
378 | .kind = UAPI_DEF_WRITE, \ | |
379 | .scope = UAPI_SCOPE_OBJECT, \ | |
380 | .write = { .is_ex = 1, .command_num = _command_num }, \ | |
974d6b4b | 381 | .func_write = _func, \ |
669dac1e | 382 | _cmd_desc, \ |
6884c6c4 JG |
383 | }, \ |
384 | ##__VA_ARGS__ | |
385 | ||
6829c1c2 JG |
386 | /* |
387 | * Object is only supported if the function pointer named ibdev_fn in struct | |
388 | * ib_device is not NULL. | |
389 | */ | |
390 | #define UAPI_DEF_OBJ_NEEDS_FN(ibdev_fn) \ | |
391 | { \ | |
392 | .kind = UAPI_DEF_IS_SUPPORTED_DEV_FN, \ | |
393 | .scope = UAPI_SCOPE_OBJECT, \ | |
394 | .needs_fn_offset = \ | |
3023a1e9 | 395 | offsetof(struct ib_device_ops, ibdev_fn) + \ |
bebcfe85 GS |
396 | BUILD_BUG_ON_ZERO(sizeof_field(struct ib_device_ops, \ |
397 | ibdev_fn) != \ | |
398 | sizeof(void *)), \ | |
6829c1c2 JG |
399 | } |
400 | ||
a140692a JG |
401 | /* |
402 | * Method is only supported if the function pointer named ibdev_fn in struct | |
403 | * ib_device is not NULL. | |
404 | */ | |
405 | #define UAPI_DEF_METHOD_NEEDS_FN(ibdev_fn) \ | |
406 | { \ | |
407 | .kind = UAPI_DEF_IS_SUPPORTED_DEV_FN, \ | |
408 | .scope = UAPI_SCOPE_METHOD, \ | |
409 | .needs_fn_offset = \ | |
3023a1e9 | 410 | offsetof(struct ib_device_ops, ibdev_fn) + \ |
bebcfe85 GS |
411 | BUILD_BUG_ON_ZERO(sizeof_field(struct ib_device_ops, \ |
412 | ibdev_fn) != \ | |
413 | sizeof(void *)), \ | |
a140692a JG |
414 | } |
415 | ||
6829c1c2 JG |
416 | /* Call a function to determine if the entire object is supported or not */ |
417 | #define UAPI_DEF_IS_OBJ_SUPPORTED(_func) \ | |
418 | { \ | |
419 | .kind = UAPI_DEF_IS_SUPPORTED_FUNC, \ | |
420 | .scope = UAPI_SCOPE_OBJECT, .func_is_supported = _func, \ | |
421 | } | |
422 | ||
0cbf432d JG |
423 | /* Include another struct uapi_definition in this one */ |
424 | #define UAPI_DEF_CHAIN(_def_var) \ | |
425 | { \ | |
426 | .kind = UAPI_DEF_CHAIN, .chain = _def_var, \ | |
427 | } | |
428 | ||
429 | /* Temporary until the tree base description is replaced */ | |
a1462351 | 430 | #define UAPI_DEF_CHAIN_OBJ_TREE(_object_enum, _object_ptr, ...) \ |
0cbf432d JG |
431 | { \ |
432 | .kind = UAPI_DEF_CHAIN_OBJ_TREE, \ | |
433 | .object_start = { .object_id = _object_enum }, \ | |
434 | .chain_obj_tree = _object_ptr, \ | |
a1462351 | 435 | }, \ |
0cbf432d | 436 | ##__VA_ARGS__ |
a1462351 LR |
437 | #define UAPI_DEF_CHAIN_OBJ_TREE_NAMED(_object_enum, ...) \ |
438 | UAPI_DEF_CHAIN_OBJ_TREE(_object_enum, &UVERBS_OBJECT(_object_enum), \ | |
439 | ##__VA_ARGS__) | |
0cbf432d | 440 | |
d108dac0 JG |
441 | /* |
442 | * ======================================= | |
443 | * Attribute Specifications | |
444 | * ======================================= | |
445 | */ | |
c66db311 | 446 | |
c66db311 | 447 | #define UVERBS_ATTR_SIZE(_min_len, _len) \ |
d108dac0 | 448 | .u.ptr.min_len = _min_len, .u.ptr.len = _len |
422e3d37 | 449 | |
fd44e385 YH |
450 | #define UVERBS_ATTR_NO_DATA() UVERBS_ATTR_SIZE(0, 0) |
451 | ||
422e3d37 JG |
452 | /* |
453 | * Specifies a uapi structure that cannot be extended. The user must always | |
454 | * supply the whole structure and nothing more. The structure must be declared | |
455 | * in a header under include/uapi/rdma. | |
456 | */ | |
457 | #define UVERBS_ATTR_TYPE(_type) \ | |
458 | .u.ptr.min_len = sizeof(_type), .u.ptr.len = sizeof(_type) | |
459 | /* | |
460 | * Specifies a uapi structure where the user must provide at least up to | |
461 | * member 'last'. Anything after last and up until the end of the structure | |
462 | * can be non-zero, anything longer than the end of the structure must be | |
463 | * zero. The structure must be declared in a header under include/uapi/rdma. | |
464 | */ | |
465 | #define UVERBS_ATTR_STRUCT(_type, _last) \ | |
466 | .zero_trailing = 1, \ | |
ffd7339a | 467 | UVERBS_ATTR_SIZE(offsetofend(_type, _last), sizeof(_type)) |
540cd692 JG |
468 | /* |
469 | * Specifies at least min_len bytes must be passed in, but the amount can be | |
470 | * larger, up to the protocol maximum size. No check for zeroing is done. | |
471 | */ | |
472 | #define UVERBS_ATTR_MIN_SIZE(_min_len) UVERBS_ATTR_SIZE(_min_len, USHRT_MAX) | |
c66db311 | 473 | |
d108dac0 | 474 | /* Must be used in the '...' of any UVERBS_ATTR */ |
83bb4442 JG |
475 | #define UA_ALLOC_AND_COPY .alloc_and_copy = 1 |
476 | #define UA_MANDATORY .mandatory = 1 | |
83bb4442 | 477 | #define UA_OPTIONAL .mandatory = 0 |
d108dac0 | 478 | |
70cd20ae GL |
479 | /* |
480 | * min_len must be bigger than 0 and _max_len must be smaller than 4095. Only | |
481 | * READ\WRITE accesses are supported. | |
482 | */ | |
483 | #define UVERBS_ATTR_IDRS_ARR(_attr_id, _idr_type, _access, _min_len, _max_len, \ | |
484 | ...) \ | |
485 | (&(const struct uverbs_attr_def){ \ | |
486 | .id = (_attr_id) + \ | |
487 | BUILD_BUG_ON_ZERO((_min_len) == 0 || \ | |
488 | (_max_len) > \ | |
489 | PAGE_SIZE / sizeof(void *) || \ | |
490 | (_min_len) > (_max_len) || \ | |
491 | (_access) == UVERBS_ACCESS_NEW || \ | |
492 | (_access) == UVERBS_ACCESS_DESTROY), \ | |
493 | .attr = { .type = UVERBS_ATTR_TYPE_IDRS_ARRAY, \ | |
494 | .u2.objs_arr.obj_type = _idr_type, \ | |
495 | .u2.objs_arr.access = _access, \ | |
496 | .u2.objs_arr.min_len = _min_len, \ | |
497 | .u2.objs_arr.max_len = _max_len, \ | |
498 | __VA_ARGS__ } }) | |
499 | ||
4d7e8cc5 YH |
500 | /* |
501 | * Only for use with UVERBS_ATTR_IDR, allows any uobject type to be accepted, | |
502 | * the user must validate the type of the uobject instead. | |
503 | */ | |
504 | #define UVERBS_IDR_ANY_OBJECT 0xFFFF | |
505 | ||
d108dac0 | 506 | #define UVERBS_ATTR_IDR(_attr_id, _idr_type, _access, ...) \ |
9a119cd5 | 507 | (&(const struct uverbs_attr_def){ \ |
d108dac0 JG |
508 | .id = _attr_id, \ |
509 | .attr = { .type = UVERBS_ATTR_TYPE_IDR, \ | |
510 | .u.obj.obj_type = _idr_type, \ | |
511 | .u.obj.access = _access, \ | |
512 | __VA_ARGS__ } }) | |
513 | ||
514 | #define UVERBS_ATTR_FD(_attr_id, _fd_type, _access, ...) \ | |
9a119cd5 | 515 | (&(const struct uverbs_attr_def){ \ |
d108dac0 JG |
516 | .id = (_attr_id) + \ |
517 | BUILD_BUG_ON_ZERO((_access) != UVERBS_ACCESS_NEW && \ | |
518 | (_access) != UVERBS_ACCESS_READ), \ | |
519 | .attr = { .type = UVERBS_ATTR_TYPE_FD, \ | |
520 | .u.obj.obj_type = _fd_type, \ | |
521 | .u.obj.access = _access, \ | |
522 | __VA_ARGS__ } }) | |
523 | ||
524 | #define UVERBS_ATTR_PTR_IN(_attr_id, _type, ...) \ | |
9a119cd5 | 525 | (&(const struct uverbs_attr_def){ \ |
d108dac0 JG |
526 | .id = _attr_id, \ |
527 | .attr = { .type = UVERBS_ATTR_TYPE_PTR_IN, \ | |
528 | _type, \ | |
529 | __VA_ARGS__ } }) | |
530 | ||
531 | #define UVERBS_ATTR_PTR_OUT(_attr_id, _type, ...) \ | |
9a119cd5 | 532 | (&(const struct uverbs_attr_def){ \ |
d108dac0 JG |
533 | .id = _attr_id, \ |
534 | .attr = { .type = UVERBS_ATTR_TYPE_PTR_OUT, \ | |
535 | _type, \ | |
536 | __VA_ARGS__ } }) | |
537 | ||
538 | /* _enum_arry should be a 'static const union uverbs_attr_spec[]' */ | |
539 | #define UVERBS_ATTR_ENUM_IN(_attr_id, _enum_arr, ...) \ | |
9a119cd5 | 540 | (&(const struct uverbs_attr_def){ \ |
d108dac0 JG |
541 | .id = _attr_id, \ |
542 | .attr = { .type = UVERBS_ATTR_TYPE_ENUM_IN, \ | |
543 | .u2.enum_def.ids = _enum_arr, \ | |
544 | .u.enum_def.num_elems = ARRAY_SIZE(_enum_arr), \ | |
545 | __VA_ARGS__ }, \ | |
546 | }) | |
35410306 | 547 | |
0953fffe MB |
548 | /* An input value that is a member in the enum _enum_type. */ |
549 | #define UVERBS_ATTR_CONST_IN(_attr_id, _enum_type, ...) \ | |
550 | UVERBS_ATTR_PTR_IN( \ | |
551 | _attr_id, \ | |
552 | UVERBS_ATTR_SIZE( \ | |
553 | sizeof(u64) + BUILD_BUG_ON_ZERO(!sizeof(_enum_type)), \ | |
554 | sizeof(u64)), \ | |
555 | __VA_ARGS__) | |
556 | ||
bccd0622 JG |
557 | /* |
558 | * An input value that is a bitwise combination of values of _enum_type. | |
559 | * This permits the flag value to be passed as either a u32 or u64, it must | |
560 | * be retrieved via uverbs_get_flag(). | |
561 | */ | |
562 | #define UVERBS_ATTR_FLAGS_IN(_attr_id, _enum_type, ...) \ | |
563 | UVERBS_ATTR_PTR_IN( \ | |
564 | _attr_id, \ | |
565 | UVERBS_ATTR_SIZE(sizeof(u32) + BUILD_BUG_ON_ZERO( \ | |
566 | !sizeof(_enum_type *)), \ | |
567 | sizeof(u64)), \ | |
568 | __VA_ARGS__) | |
569 | ||
6c61d2a5 JG |
570 | /* |
571 | * This spec is used in order to pass information to the hardware driver in a | |
572 | * legacy way. Every verb that could get driver specific data should get this | |
573 | * spec. | |
574 | */ | |
575 | #define UVERBS_ATTR_UHW() \ | |
9a119cd5 | 576 | UVERBS_ATTR_PTR_IN(UVERBS_ATTR_UHW_IN, \ |
540cd692 | 577 | UVERBS_ATTR_MIN_SIZE(0), \ |
07f05f40 JG |
578 | UA_OPTIONAL, \ |
579 | .is_udata = 1), \ | |
9a119cd5 | 580 | UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_UHW_OUT, \ |
540cd692 | 581 | UVERBS_ATTR_MIN_SIZE(0), \ |
07f05f40 JG |
582 | UA_OPTIONAL, \ |
583 | .is_udata = 1) | |
6c61d2a5 | 584 | |
fac9658c MB |
585 | /* ================================================= |
586 | * Parsing infrastructure | |
587 | * ================================================= | |
588 | */ | |
589 | ||
3a863577 | 590 | |
fac9658c | 591 | struct uverbs_ptr_attr { |
8762d149 MB |
592 | /* |
593 | * If UVERBS_ATTR_SPEC_F_ALLOC_AND_COPY is set then the 'ptr' is | |
594 | * used. | |
595 | */ | |
596 | union { | |
597 | void *ptr; | |
598 | u64 data; | |
599 | }; | |
fac9658c | 600 | u16 len; |
6a1f444f | 601 | u16 uattr_idx; |
494c5580 | 602 | u8 enum_id; |
fac9658c MB |
603 | }; |
604 | ||
f43dbebf MB |
605 | struct uverbs_obj_attr { |
606 | struct ib_uobject *uobject; | |
3a863577 | 607 | const struct uverbs_api_attr *attr_elm; |
f43dbebf MB |
608 | }; |
609 | ||
70cd20ae GL |
610 | struct uverbs_objs_arr_attr { |
611 | struct ib_uobject **uobjects; | |
612 | u16 len; | |
613 | }; | |
614 | ||
f43dbebf | 615 | struct uverbs_attr { |
fac9658c MB |
616 | union { |
617 | struct uverbs_ptr_attr ptr_attr; | |
618 | struct uverbs_obj_attr obj_attr; | |
70cd20ae | 619 | struct uverbs_objs_arr_attr objs_arr_attr; |
fac9658c | 620 | }; |
f43dbebf MB |
621 | }; |
622 | ||
f43dbebf | 623 | struct uverbs_attr_bundle { |
ef87df2c | 624 | struct ib_udata driver_udata; |
c2a939fd | 625 | struct ib_udata ucore; |
4b3dd2bb | 626 | struct ib_uverbs_file *ufile; |
3d9dfd06 | 627 | struct ib_ucontext *context; |
0f63ef1d | 628 | struct ib_uobject *uobject; |
3a863577 JG |
629 | DECLARE_BITMAP(attr_present, UVERBS_API_ATTR_BKEY_LEN); |
630 | struct uverbs_attr attrs[]; | |
f43dbebf MB |
631 | }; |
632 | ||
35410306 MB |
633 | static inline bool uverbs_attr_is_valid(const struct uverbs_attr_bundle *attrs_bundle, |
634 | unsigned int idx) | |
635 | { | |
3a863577 JG |
636 | return test_bit(uapi_bkey_attr(uapi_key_attr(idx)), |
637 | attrs_bundle->attr_present); | |
35410306 MB |
638 | } |
639 | ||
730623f4 SR |
640 | /** |
641 | * rdma_udata_to_drv_context - Helper macro to get the driver's context out of | |
642 | * ib_udata which is embedded in uverbs_attr_bundle. | |
643 | * | |
644 | * If udata is not NULL this cannot fail. Otherwise a NULL udata will result | |
645 | * in a NULL ucontext pointer, as a safety precaution. Callers should be using | |
646 | * 'udata' to determine if the driver call is in user or kernel mode, not | |
647 | * 'ucontext'. | |
648 | * | |
649 | */ | |
bfb972c5 AB |
650 | static inline struct uverbs_attr_bundle * |
651 | rdma_udata_to_uverbs_attr_bundle(struct ib_udata *udata) | |
652 | { | |
653 | return container_of(udata, struct uverbs_attr_bundle, driver_udata); | |
654 | } | |
655 | ||
656 | #define rdma_udata_to_drv_context(udata, drv_dev_struct, member) \ | |
657 | (udata ? container_of(rdma_udata_to_uverbs_attr_bundle(udata)->context, \ | |
658 | drv_dev_struct, member) : (drv_dev_struct *)NULL) | |
730623f4 | 659 | |
41b2a71f MB |
660 | #define IS_UVERBS_COPY_ERR(_ret) ((_ret) && (_ret) != -ENOENT) |
661 | ||
d70724f1 MB |
662 | static inline const struct uverbs_attr *uverbs_attr_get(const struct uverbs_attr_bundle *attrs_bundle, |
663 | u16 idx) | |
664 | { | |
d70724f1 MB |
665 | if (!uverbs_attr_is_valid(attrs_bundle, idx)) |
666 | return ERR_PTR(-ENOENT); | |
667 | ||
3a863577 | 668 | return &attrs_bundle->attrs[uapi_bkey_attr(uapi_key_attr(idx))]; |
d70724f1 MB |
669 | } |
670 | ||
494c5580 MB |
671 | static inline int uverbs_attr_get_enum_id(const struct uverbs_attr_bundle *attrs_bundle, |
672 | u16 idx) | |
673 | { | |
674 | const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); | |
675 | ||
676 | if (IS_ERR(attr)) | |
677 | return PTR_ERR(attr); | |
678 | ||
679 | return attr->ptr_attr.enum_id; | |
680 | } | |
681 | ||
be934cca AL |
682 | static inline void *uverbs_attr_get_obj(const struct uverbs_attr_bundle *attrs_bundle, |
683 | u16 idx) | |
684 | { | |
f4602cbb | 685 | const struct uverbs_attr *attr; |
be934cca | 686 | |
f4602cbb JG |
687 | attr = uverbs_attr_get(attrs_bundle, idx); |
688 | if (IS_ERR(attr)) | |
689 | return ERR_CAST(attr); | |
be934cca | 690 | |
f4602cbb | 691 | return attr->obj_attr.uobject->object; |
be934cca AL |
692 | } |
693 | ||
3efa3812 MB |
694 | static inline struct ib_uobject *uverbs_attr_get_uobject(const struct uverbs_attr_bundle *attrs_bundle, |
695 | u16 idx) | |
696 | { | |
697 | const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); | |
698 | ||
699 | if (IS_ERR(attr)) | |
700 | return ERR_CAST(attr); | |
701 | ||
702 | return attr->obj_attr.uobject; | |
703 | } | |
704 | ||
8762d149 MB |
705 | static inline int |
706 | uverbs_attr_get_len(const struct uverbs_attr_bundle *attrs_bundle, u16 idx) | |
707 | { | |
708 | const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); | |
709 | ||
710 | if (IS_ERR(attr)) | |
711 | return PTR_ERR(attr); | |
712 | ||
713 | return attr->ptr_attr.len; | |
714 | } | |
715 | ||
0ac8903c JG |
716 | void uverbs_finalize_uobj_create(const struct uverbs_attr_bundle *attrs_bundle, |
717 | u16 idx); | |
718 | ||
cbfdd442 MS |
719 | /* |
720 | * uverbs_attr_ptr_get_array_size() - Get array size pointer by a ptr | |
721 | * attribute. | |
722 | * @attrs: The attribute bundle | |
723 | * @idx: The ID of the attribute | |
724 | * @elem_size: The size of the element in the array | |
725 | */ | |
726 | static inline int | |
727 | uverbs_attr_ptr_get_array_size(struct uverbs_attr_bundle *attrs, u16 idx, | |
728 | size_t elem_size) | |
729 | { | |
730 | int size = uverbs_attr_get_len(attrs, idx); | |
731 | ||
732 | if (size < 0) | |
733 | return size; | |
734 | ||
735 | if (size % elem_size) | |
736 | return -EINVAL; | |
737 | ||
738 | return size / elem_size; | |
739 | } | |
740 | ||
70cd20ae GL |
741 | /** |
742 | * uverbs_attr_get_uobjs_arr() - Provides array's properties for attribute for | |
743 | * UVERBS_ATTR_TYPE_IDRS_ARRAY. | |
744 | * @arr: Returned pointer to array of pointers for uobjects or NULL if | |
745 | * the attribute isn't provided. | |
746 | * | |
747 | * Return: The array length or 0 if no attribute was provided. | |
748 | */ | |
749 | static inline int uverbs_attr_get_uobjs_arr( | |
750 | const struct uverbs_attr_bundle *attrs_bundle, u16 attr_idx, | |
751 | struct ib_uobject ***arr) | |
752 | { | |
753 | const struct uverbs_attr *attr = | |
754 | uverbs_attr_get(attrs_bundle, attr_idx); | |
755 | ||
756 | if (IS_ERR(attr)) { | |
757 | *arr = NULL; | |
758 | return 0; | |
759 | } | |
760 | ||
761 | *arr = attr->objs_arr_attr.uobjects; | |
762 | ||
763 | return attr->objs_arr_attr.len; | |
764 | } | |
765 | ||
89d9e8d3 MB |
766 | static inline bool uverbs_attr_ptr_is_inline(const struct uverbs_attr *attr) |
767 | { | |
768 | return attr->ptr_attr.len <= sizeof(attr->ptr_attr.data); | |
769 | } | |
770 | ||
8762d149 MB |
771 | static inline void *uverbs_attr_get_alloced_ptr( |
772 | const struct uverbs_attr_bundle *attrs_bundle, u16 idx) | |
773 | { | |
774 | const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); | |
775 | ||
776 | if (IS_ERR(attr)) | |
777 | return (void *)attr; | |
778 | ||
779 | return uverbs_attr_ptr_is_inline(attr) ? (void *)&attr->ptr_attr.data : | |
780 | attr->ptr_attr.ptr; | |
781 | } | |
782 | ||
89d9e8d3 | 783 | static inline int _uverbs_copy_from(void *to, |
d70724f1 | 784 | const struct uverbs_attr_bundle *attrs_bundle, |
89d9e8d3 MB |
785 | size_t idx, |
786 | size_t size) | |
d70724f1 MB |
787 | { |
788 | const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); | |
789 | ||
790 | if (IS_ERR(attr)) | |
791 | return PTR_ERR(attr); | |
792 | ||
89d9e8d3 MB |
793 | /* |
794 | * Validation ensures attr->ptr_attr.len >= size. If the caller is | |
c66db311 MB |
795 | * using UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO then it must call |
796 | * uverbs_copy_from_or_zero. | |
89d9e8d3 MB |
797 | */ |
798 | if (unlikely(size < attr->ptr_attr.len)) | |
799 | return -EINVAL; | |
800 | ||
801 | if (uverbs_attr_ptr_is_inline(attr)) | |
d70724f1 | 802 | memcpy(to, &attr->ptr_attr.data, attr->ptr_attr.len); |
2f36028c JG |
803 | else if (copy_from_user(to, u64_to_user_ptr(attr->ptr_attr.data), |
804 | attr->ptr_attr.len)) | |
d70724f1 MB |
805 | return -EFAULT; |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
c66db311 MB |
810 | static inline int _uverbs_copy_from_or_zero(void *to, |
811 | const struct uverbs_attr_bundle *attrs_bundle, | |
812 | size_t idx, | |
813 | size_t size) | |
814 | { | |
815 | const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); | |
816 | size_t min_size; | |
817 | ||
818 | if (IS_ERR(attr)) | |
819 | return PTR_ERR(attr); | |
820 | ||
821 | min_size = min_t(size_t, size, attr->ptr_attr.len); | |
822 | ||
823 | if (uverbs_attr_ptr_is_inline(attr)) | |
824 | memcpy(to, &attr->ptr_attr.data, min_size); | |
825 | else if (copy_from_user(to, u64_to_user_ptr(attr->ptr_attr.data), | |
826 | min_size)) | |
827 | return -EFAULT; | |
828 | ||
829 | if (size > min_size) | |
830 | memset(to + min_size, 0, size - min_size); | |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
d70724f1 | 835 | #define uverbs_copy_from(to, attrs_bundle, idx) \ |
89d9e8d3 | 836 | _uverbs_copy_from(to, attrs_bundle, idx, sizeof(*to)) |
d70724f1 | 837 | |
c66db311 MB |
838 | #define uverbs_copy_from_or_zero(to, attrs_bundle, idx) \ |
839 | _uverbs_copy_from_or_zero(to, attrs_bundle, idx, sizeof(*to)) | |
840 | ||
8313c10f JG |
841 | static inline struct ib_ucontext * |
842 | ib_uverbs_get_ucontext(const struct uverbs_attr_bundle *attrs) | |
843 | { | |
844 | return ib_uverbs_get_ucontext_file(attrs->ufile); | |
845 | } | |
846 | ||
bccd0622 JG |
847 | #if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS) |
848 | int uverbs_get_flags64(u64 *to, const struct uverbs_attr_bundle *attrs_bundle, | |
849 | size_t idx, u64 allowed_bits); | |
850 | int uverbs_get_flags32(u32 *to, const struct uverbs_attr_bundle *attrs_bundle, | |
851 | size_t idx, u64 allowed_bits); | |
6a1f444f JG |
852 | int uverbs_copy_to(const struct uverbs_attr_bundle *attrs_bundle, size_t idx, |
853 | const void *from, size_t size); | |
461bb2ee JG |
854 | __malloc void *_uverbs_alloc(struct uverbs_attr_bundle *bundle, size_t size, |
855 | gfp_t flags); | |
856 | ||
857 | static inline __malloc void *uverbs_alloc(struct uverbs_attr_bundle *bundle, | |
858 | size_t size) | |
859 | { | |
860 | return _uverbs_alloc(bundle, size, GFP_KERNEL); | |
861 | } | |
862 | ||
863 | static inline __malloc void *uverbs_zalloc(struct uverbs_attr_bundle *bundle, | |
864 | size_t size) | |
865 | { | |
866 | return _uverbs_alloc(bundle, size, GFP_KERNEL | __GFP_ZERO); | |
867 | } | |
e0da6899 AH |
868 | |
869 | static inline __malloc void *uverbs_kcalloc(struct uverbs_attr_bundle *bundle, | |
870 | size_t n, size_t size) | |
871 | { | |
872 | size_t bytes; | |
873 | ||
874 | if (unlikely(check_mul_overflow(n, size, &bytes))) | |
875 | return ERR_PTR(-EOVERFLOW); | |
876 | return uverbs_zalloc(bundle, bytes); | |
877 | } | |
2904bb37 YH |
878 | |
879 | int _uverbs_get_const_signed(s64 *to, | |
880 | const struct uverbs_attr_bundle *attrs_bundle, | |
881 | size_t idx, s64 lower_bound, u64 upper_bound, | |
882 | s64 *def_val); | |
883 | int _uverbs_get_const_unsigned(u64 *to, | |
884 | const struct uverbs_attr_bundle *attrs_bundle, | |
885 | size_t idx, u64 upper_bound, u64 *def_val); | |
2e8039c6 MG |
886 | int uverbs_copy_to_struct_or_zero(const struct uverbs_attr_bundle *bundle, |
887 | size_t idx, const void *from, size_t size); | |
bccd0622 JG |
888 | #else |
889 | static inline int | |
890 | uverbs_get_flags64(u64 *to, const struct uverbs_attr_bundle *attrs_bundle, | |
891 | size_t idx, u64 allowed_bits) | |
892 | { | |
893 | return -EINVAL; | |
894 | } | |
895 | static inline int | |
896 | uverbs_get_flags32(u32 *to, const struct uverbs_attr_bundle *attrs_bundle, | |
897 | size_t idx, u64 allowed_bits) | |
898 | { | |
899 | return -EINVAL; | |
900 | } | |
6a1f444f JG |
901 | static inline int uverbs_copy_to(const struct uverbs_attr_bundle *attrs_bundle, |
902 | size_t idx, const void *from, size_t size) | |
903 | { | |
904 | return -EINVAL; | |
905 | } | |
461bb2ee JG |
906 | static inline __malloc void *uverbs_alloc(struct uverbs_attr_bundle *bundle, |
907 | size_t size) | |
908 | { | |
909 | return ERR_PTR(-EINVAL); | |
910 | } | |
911 | static inline __malloc void *uverbs_zalloc(struct uverbs_attr_bundle *bundle, | |
912 | size_t size) | |
913 | { | |
914 | return ERR_PTR(-EINVAL); | |
915 | } | |
0953fffe MB |
916 | static inline int |
917 | _uverbs_get_const(s64 *to, const struct uverbs_attr_bundle *attrs_bundle, | |
918 | size_t idx, s64 lower_bound, u64 upper_bound, | |
919 | s64 *def_val) | |
920 | { | |
921 | return -EINVAL; | |
922 | } | |
2e8039c6 MG |
923 | static inline int |
924 | uverbs_copy_to_struct_or_zero(const struct uverbs_attr_bundle *bundle, | |
925 | size_t idx, const void *from, size_t size) | |
926 | { | |
927 | return -EINVAL; | |
928 | } | |
dbb3e9db Y |
929 | static inline int |
930 | _uverbs_get_const_signed(s64 *to, | |
931 | const struct uverbs_attr_bundle *attrs_bundle, | |
2904bb37 YH |
932 | size_t idx, s64 lower_bound, u64 upper_bound, |
933 | s64 *def_val) | |
934 | { | |
935 | return -EINVAL; | |
936 | } | |
dbb3e9db | 937 | static inline int |
2904bb37 YH |
938 | _uverbs_get_const_unsigned(u64 *to, |
939 | const struct uverbs_attr_bundle *attrs_bundle, | |
940 | size_t idx, u64 upper_bound, u64 *def_val) | |
941 | { | |
942 | return -EINVAL; | |
943 | } | |
bccd0622 JG |
944 | #endif |
945 | ||
2904bb37 | 946 | #define uverbs_get_const_signed(_to, _attrs_bundle, _idx) \ |
0953fffe MB |
947 | ({ \ |
948 | s64 _val; \ | |
2904bb37 YH |
949 | int _ret = \ |
950 | _uverbs_get_const_signed(&_val, _attrs_bundle, _idx, \ | |
951 | type_min(typeof(*(_to))), \ | |
952 | type_max(typeof(*(_to))), NULL); \ | |
953 | (*(_to)) = _val; \ | |
0953fffe MB |
954 | _ret; \ |
955 | }) | |
956 | ||
2904bb37 YH |
957 | #define uverbs_get_const_unsigned(_to, _attrs_bundle, _idx) \ |
958 | ({ \ | |
959 | u64 _val; \ | |
960 | int _ret = \ | |
961 | _uverbs_get_const_unsigned(&_val, _attrs_bundle, _idx, \ | |
962 | type_max(typeof(*(_to))), NULL); \ | |
963 | (*(_to)) = _val; \ | |
964 | _ret; \ | |
965 | }) | |
966 | ||
967 | #define uverbs_get_const_default_signed(_to, _attrs_bundle, _idx, _default) \ | |
0953fffe MB |
968 | ({ \ |
969 | s64 _val; \ | |
970 | s64 _def_val = _default; \ | |
971 | int _ret = \ | |
2904bb37 YH |
972 | _uverbs_get_const_signed(&_val, _attrs_bundle, _idx, \ |
973 | type_min(typeof(*(_to))), \ | |
974 | type_max(typeof(*(_to))), &_def_val); \ | |
975 | (*(_to)) = _val; \ | |
976 | _ret; \ | |
977 | }) | |
978 | ||
979 | #define uverbs_get_const_default_unsigned(_to, _attrs_bundle, _idx, _default) \ | |
980 | ({ \ | |
981 | u64 _val; \ | |
982 | u64 _def_val = _default; \ | |
983 | int _ret = \ | |
984 | _uverbs_get_const_unsigned(&_val, _attrs_bundle, _idx, \ | |
985 | type_max(typeof(*(_to))), &_def_val); \ | |
986 | (*(_to)) = _val; \ | |
0953fffe MB |
987 | _ret; \ |
988 | }) | |
2904bb37 YH |
989 | |
990 | #define uverbs_get_const(_to, _attrs_bundle, _idx) \ | |
991 | (is_signed_type(typeof(*(_to))) ? \ | |
992 | uverbs_get_const_signed(_to, _attrs_bundle, _idx) : \ | |
993 | uverbs_get_const_unsigned(_to, _attrs_bundle, _idx)) \ | |
994 | ||
995 | #define uverbs_get_const_default(_to, _attrs_bundle, _idx, _default) \ | |
996 | (is_signed_type(typeof(*(_to))) ? \ | |
997 | uverbs_get_const_default_signed(_to, _attrs_bundle, _idx, \ | |
998 | _default) : \ | |
999 | uverbs_get_const_default_unsigned(_to, _attrs_bundle, _idx, \ | |
1000 | _default)) | |
1001 | ||
118620d3 | 1002 | #endif |