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1da177e4 LT |
1 | #ifndef _LINUX_MODULE_PARAMS_H |
2 | #define _LINUX_MODULE_PARAMS_H | |
3 | /* (C) Copyright 2001, 2002 Rusty Russell IBM Corporation */ | |
4 | #include <linux/init.h> | |
5 | #include <linux/stringify.h> | |
6 | #include <linux/kernel.h> | |
7 | ||
8 | /* You can override this manually, but generally this should match the | |
9 | module name. */ | |
10 | #ifdef MODULE | |
11 | #define MODULE_PARAM_PREFIX /* empty */ | |
12 | #else | |
367cb704 | 13 | #define MODULE_PARAM_PREFIX KBUILD_MODNAME "." |
1da177e4 LT |
14 | #endif |
15 | ||
730b69d2 RR |
16 | /* Chosen so that structs with an unsigned long line up. */ |
17 | #define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long)) | |
18 | ||
b75be420 | 19 | #ifdef MODULE |
1da177e4 | 20 | #define __MODULE_INFO(tag, name, info) \ |
34182eea | 21 | static const char __UNIQUE_ID(name)[] \ |
b6472776 JB |
22 | __used __attribute__((section(".modinfo"), unused, aligned(1))) \ |
23 | = __stringify(tag) "=" info | |
1da177e4 | 24 | #else /* !MODULE */ |
b75be420 LW |
25 | /* This struct is here for syntactic coherency, it is not used */ |
26 | #define __MODULE_INFO(tag, name, info) \ | |
34182eea | 27 | struct __UNIQUE_ID(name) {} |
1da177e4 LT |
28 | #endif |
29 | #define __MODULE_PARM_TYPE(name, _type) \ | |
30 | __MODULE_INFO(parmtype, name##type, #name ":" _type) | |
31 | ||
639938eb PG |
32 | /* One for each parameter, describing how to use it. Some files do |
33 | multiple of these per line, so can't just use MODULE_INFO. */ | |
34 | #define MODULE_PARM_DESC(_parm, desc) \ | |
35 | __MODULE_INFO(parm, _parm, #_parm ":" desc) | |
36 | ||
1da177e4 LT |
37 | struct kernel_param; |
38 | ||
ab013c5f SR |
39 | /* |
40 | * Flags available for kernel_param_ops | |
41 | * | |
42 | * NOARG - the parameter allows for no argument (foo instead of foo=1) | |
43 | */ | |
44 | enum { | |
6a4c2643 | 45 | KERNEL_PARAM_OPS_FL_NOARG = (1 << 0) |
ab013c5f SR |
46 | }; |
47 | ||
9bbb9e5a | 48 | struct kernel_param_ops { |
ab013c5f SR |
49 | /* How the ops should behave */ |
50 | unsigned int flags; | |
9bbb9e5a RR |
51 | /* Returns 0, or -errno. arg is in kp->arg. */ |
52 | int (*set)(const char *val, const struct kernel_param *kp); | |
53 | /* Returns length written or -errno. Buffer is 4k (ie. be short!) */ | |
54 | int (*get)(char *buffer, const struct kernel_param *kp); | |
e6df34a4 RR |
55 | /* Optional function to free kp->arg when module unloaded. */ |
56 | void (*free)(void *arg); | |
9bbb9e5a | 57 | }; |
1da177e4 | 58 | |
91f9d330 JN |
59 | /* |
60 | * Flags available for kernel_param | |
61 | * | |
62 | * UNSAFE - the parameter is dangerous and setting it will taint the kernel | |
63 | */ | |
64 | enum { | |
65 | KERNEL_PARAM_FL_UNSAFE = (1 << 0) | |
66 | }; | |
67 | ||
1da177e4 LT |
68 | struct kernel_param { |
69 | const char *name; | |
9bbb9e5a | 70 | const struct kernel_param_ops *ops; |
45fcc70c | 71 | u16 perm; |
91f9d330 JN |
72 | s8 level; |
73 | u8 flags; | |
22e48eaf JB |
74 | union { |
75 | void *arg; | |
76 | const struct kparam_string *str; | |
77 | const struct kparam_array *arr; | |
78 | }; | |
1da177e4 LT |
79 | }; |
80 | ||
81 | /* Special one for strings we want to copy into */ | |
82 | struct kparam_string { | |
83 | unsigned int maxlen; | |
84 | char *string; | |
85 | }; | |
86 | ||
87 | /* Special one for arrays */ | |
88 | struct kparam_array | |
89 | { | |
90 | unsigned int max; | |
c5be0b2e | 91 | unsigned int elemsize; |
1da177e4 | 92 | unsigned int *num; |
9bbb9e5a | 93 | const struct kernel_param_ops *ops; |
1da177e4 LT |
94 | void *elem; |
95 | }; | |
96 | ||
546970bc RR |
97 | /** |
98 | * module_param - typesafe helper for a module/cmdline parameter | |
99 | * @value: the variable to alter, and exposed parameter name. | |
100 | * @type: the type of the parameter | |
101 | * @perm: visibility in sysfs. | |
102 | * | |
103 | * @value becomes the module parameter, or (prefixed by KBUILD_MODNAME and a | |
104 | * ".") the kernel commandline parameter. Note that - is changed to _, so | |
105 | * the user can use "foo-bar=1" even for variable "foo_bar". | |
106 | * | |
107 | * @perm is 0 if the the variable is not to appear in sysfs, or 0444 | |
108 | * for world-readable, 0644 for root-writable, etc. Note that if it | |
109 | * is writable, you may need to use kparam_block_sysfs_write() around | |
110 | * accesses (esp. charp, which can be kfreed when it changes). | |
111 | * | |
112 | * The @type is simply pasted to refer to a param_ops_##type and a | |
113 | * param_check_##type: for convenience many standard types are provided but | |
114 | * you can create your own by defining those variables. | |
115 | * | |
116 | * Standard types are: | |
117 | * byte, short, ushort, int, uint, long, ulong | |
118 | * charp: a character pointer | |
119 | * bool: a bool, values 0/1, y/n, Y/N. | |
120 | * invbool: the above, only sense-reversed (N = true). | |
121 | */ | |
122 | #define module_param(name, type, perm) \ | |
123 | module_param_named(name, name, type, perm) | |
124 | ||
125 | /** | |
126 | * module_param_named - typesafe helper for a renamed module/cmdline parameter | |
127 | * @name: a valid C identifier which is the parameter name. | |
128 | * @value: the actual lvalue to alter. | |
129 | * @type: the type of the parameter | |
130 | * @perm: visibility in sysfs. | |
131 | * | |
132 | * Usually it's a good idea to have variable names and user-exposed names the | |
133 | * same, but that's harder if the variable must be non-static or is inside a | |
134 | * structure. This allows exposure under a different name. | |
135 | */ | |
136 | #define module_param_named(name, value, type, perm) \ | |
137 | param_check_##type(name, &(value)); \ | |
138 | module_param_cb(name, ¶m_ops_##type, &value, perm); \ | |
139 | __MODULE_PARM_TYPE(name, #type) | |
140 | ||
141 | /** | |
142 | * module_param_cb - general callback for a module/cmdline parameter | |
143 | * @name: a valid C identifier which is the parameter name. | |
144 | * @ops: the set & get operations for this parameter. | |
145 | * @perm: visibility in sysfs. | |
146 | * | |
147 | * The ops can have NULL set or get functions. | |
148 | */ | |
149 | #define module_param_cb(name, ops, arg, perm) \ | |
91f9d330 | 150 | __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, 0) |
026cee00 PM |
151 | |
152 | /** | |
153 | * <level>_param_cb - general callback for a module/cmdline parameter | |
154 | * to be evaluated before certain initcall level | |
155 | * @name: a valid C identifier which is the parameter name. | |
156 | * @ops: the set & get operations for this parameter. | |
157 | * @perm: visibility in sysfs. | |
158 | * | |
159 | * The ops can have NULL set or get functions. | |
160 | */ | |
161 | #define __level_param_cb(name, ops, arg, perm, level) \ | |
91f9d330 | 162 | __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, level, 0) |
026cee00 PM |
163 | |
164 | #define core_param_cb(name, ops, arg, perm) \ | |
165 | __level_param_cb(name, ops, arg, perm, 1) | |
166 | ||
167 | #define postcore_param_cb(name, ops, arg, perm) \ | |
168 | __level_param_cb(name, ops, arg, perm, 2) | |
169 | ||
170 | #define arch_param_cb(name, ops, arg, perm) \ | |
171 | __level_param_cb(name, ops, arg, perm, 3) | |
172 | ||
173 | #define subsys_param_cb(name, ops, arg, perm) \ | |
174 | __level_param_cb(name, ops, arg, perm, 4) | |
175 | ||
176 | #define fs_param_cb(name, ops, arg, perm) \ | |
177 | __level_param_cb(name, ops, arg, perm, 5) | |
178 | ||
179 | #define device_param_cb(name, ops, arg, perm) \ | |
180 | __level_param_cb(name, ops, arg, perm, 6) | |
181 | ||
182 | #define late_param_cb(name, ops, arg, perm) \ | |
183 | __level_param_cb(name, ops, arg, perm, 7) | |
546970bc | 184 | |
91d35dd9 IK |
185 | /* On alpha, ia64 and ppc64 relocations to global data cannot go into |
186 | read-only sections (which is part of respective UNIX ABI on these | |
187 | platforms). So 'const' makes no sense and even causes compile failures | |
188 | with some compilers. */ | |
189 | #if defined(CONFIG_ALPHA) || defined(CONFIG_IA64) || defined(CONFIG_PPC64) | |
190 | #define __moduleparam_const | |
191 | #else | |
192 | #define __moduleparam_const const | |
193 | #endif | |
194 | ||
1da177e4 | 195 | /* This is the fundamental function for registering boot/module |
546970bc | 196 | parameters. */ |
91f9d330 | 197 | #define __module_param_call(prefix, name, ops, arg, perm, level, flags) \ |
9774a1f5 | 198 | /* Default value instead of permissions? */ \ |
58f86cc8 | 199 | static const char __param_str_##name[] = prefix #name; \ |
91d35dd9 | 200 | static struct kernel_param __moduleparam_const __param_##name \ |
3ff6eecc | 201 | __used \ |
1da177e4 | 202 | __attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \ |
58f86cc8 | 203 | = { __param_str_##name, ops, VERIFY_OCTAL_PERMISSIONS(perm), \ |
91f9d330 | 204 | level, flags, { arg } } |
9bbb9e5a RR |
205 | |
206 | /* Obsolete - use module_param_cb() */ | |
207 | #define module_param_call(name, set, get, arg, perm) \ | |
208 | static struct kernel_param_ops __param_ops_##name = \ | |
ab013c5f | 209 | { 0, (void *)set, (void *)get }; \ |
9bbb9e5a RR |
210 | __module_param_call(MODULE_PARAM_PREFIX, \ |
211 | name, &__param_ops_##name, arg, \ | |
91f9d330 | 212 | (perm) + sizeof(__check_old_set_param(set))*0, -1, 0) |
9bbb9e5a RR |
213 | |
214 | /* We don't get oldget: it's often a new-style param_get_uint, etc. */ | |
215 | static inline int | |
216 | __check_old_set_param(int (*oldset)(const char *, struct kernel_param *)) | |
217 | { | |
218 | return 0; | |
219 | } | |
1da177e4 | 220 | |
907b29eb RR |
221 | /** |
222 | * kparam_block_sysfs_write - make sure a parameter isn't written via sysfs. | |
223 | * @name: the name of the parameter | |
224 | * | |
225 | * There's no point blocking write on a paramter that isn't writable via sysfs! | |
226 | */ | |
227 | #define kparam_block_sysfs_write(name) \ | |
228 | do { \ | |
229 | BUG_ON(!(__param_##name.perm & 0222)); \ | |
230 | __kernel_param_lock(); \ | |
231 | } while (0) | |
232 | ||
233 | /** | |
234 | * kparam_unblock_sysfs_write - allows sysfs to write to a parameter again. | |
235 | * @name: the name of the parameter | |
236 | */ | |
237 | #define kparam_unblock_sysfs_write(name) \ | |
238 | do { \ | |
239 | BUG_ON(!(__param_##name.perm & 0222)); \ | |
240 | __kernel_param_unlock(); \ | |
241 | } while (0) | |
242 | ||
243 | /** | |
244 | * kparam_block_sysfs_read - make sure a parameter isn't read via sysfs. | |
245 | * @name: the name of the parameter | |
246 | * | |
247 | * This also blocks sysfs writes. | |
248 | */ | |
249 | #define kparam_block_sysfs_read(name) \ | |
250 | do { \ | |
251 | BUG_ON(!(__param_##name.perm & 0444)); \ | |
252 | __kernel_param_lock(); \ | |
253 | } while (0) | |
254 | ||
255 | /** | |
256 | * kparam_unblock_sysfs_read - allows sysfs to read a parameter again. | |
257 | * @name: the name of the parameter | |
258 | */ | |
259 | #define kparam_unblock_sysfs_read(name) \ | |
260 | do { \ | |
261 | BUG_ON(!(__param_##name.perm & 0444)); \ | |
262 | __kernel_param_unlock(); \ | |
263 | } while (0) | |
264 | ||
265 | #ifdef CONFIG_SYSFS | |
266 | extern void __kernel_param_lock(void); | |
267 | extern void __kernel_param_unlock(void); | |
268 | #else | |
269 | static inline void __kernel_param_lock(void) | |
270 | { | |
271 | } | |
272 | static inline void __kernel_param_unlock(void) | |
273 | { | |
274 | } | |
275 | #endif | |
276 | ||
67e67cea RR |
277 | #ifndef MODULE |
278 | /** | |
279 | * core_param - define a historical core kernel parameter. | |
280 | * @name: the name of the cmdline and sysfs parameter (often the same as var) | |
281 | * @var: the variable | |
546970bc | 282 | * @type: the type of the parameter |
67e67cea RR |
283 | * @perm: visibility in sysfs |
284 | * | |
285 | * core_param is just like module_param(), but cannot be modular and | |
286 | * doesn't add a prefix (such as "printk."). This is for compatibility | |
287 | * with __setup(), and it makes sense as truly core parameters aren't | |
288 | * tied to the particular file they're in. | |
289 | */ | |
290 | #define core_param(name, var, type, perm) \ | |
291 | param_check_##type(name, &(var)); \ | |
91f9d330 | 292 | __module_param_call("", name, ¶m_ops_##type, &var, perm, -1, 0) |
67e67cea RR |
293 | #endif /* !MODULE */ |
294 | ||
546970bc RR |
295 | /** |
296 | * module_param_string - a char array parameter | |
297 | * @name: the name of the parameter | |
298 | * @string: the string variable | |
299 | * @len: the maximum length of the string, incl. terminator | |
300 | * @perm: visibility in sysfs. | |
301 | * | |
302 | * This actually copies the string when it's set (unlike type charp). | |
303 | * @len is usually just sizeof(string). | |
304 | */ | |
1da177e4 | 305 | #define module_param_string(name, string, len, perm) \ |
22e48eaf | 306 | static const struct kparam_string __param_string_##name \ |
1da177e4 | 307 | = { len, string }; \ |
fddd5201 | 308 | __module_param_call(MODULE_PARAM_PREFIX, name, \ |
9bbb9e5a | 309 | ¶m_ops_string, \ |
91f9d330 | 310 | .str = &__param_string_##name, perm, -1, 0);\ |
1da177e4 LT |
311 | __MODULE_PARM_TYPE(name, "string") |
312 | ||
b1e4d20c MS |
313 | /** |
314 | * parameq - checks if two parameter names match | |
315 | * @name1: parameter name 1 | |
316 | * @name2: parameter name 2 | |
317 | * | |
318 | * Returns true if the two parameter names are equal. | |
319 | * Dashes (-) are considered equal to underscores (_). | |
320 | */ | |
321 | extern bool parameq(const char *name1, const char *name2); | |
322 | ||
323 | /** | |
324 | * parameqn - checks if two parameter names match | |
325 | * @name1: parameter name 1 | |
326 | * @name2: parameter name 2 | |
327 | * @n: the length to compare | |
328 | * | |
329 | * Similar to parameq(), except it compares @n characters. | |
330 | */ | |
331 | extern bool parameqn(const char *name1, const char *name2, size_t n); | |
332 | ||
1da177e4 | 333 | /* Called on module insert or kernel boot */ |
51e158c1 | 334 | extern char *parse_args(const char *name, |
1da177e4 | 335 | char *args, |
914dcaa8 | 336 | const struct kernel_param *params, |
1da177e4 | 337 | unsigned num, |
026cee00 PM |
338 | s16 level_min, |
339 | s16 level_max, | |
9fb48c74 JC |
340 | int (*unknown)(char *param, char *val, |
341 | const char *doing)); | |
1da177e4 | 342 | |
e180a6b7 RR |
343 | /* Called by module remove. */ |
344 | #ifdef CONFIG_SYSFS | |
345 | extern void destroy_params(const struct kernel_param *params, unsigned num); | |
346 | #else | |
347 | static inline void destroy_params(const struct kernel_param *params, | |
348 | unsigned num) | |
349 | { | |
350 | } | |
351 | #endif /* !CONFIG_SYSFS */ | |
352 | ||
1da177e4 LT |
353 | /* All the helper functions */ |
354 | /* The macros to do compile-time type checking stolen from Jakub | |
355 | Jelinek, who IIRC came up with this idea for the 2.4 module init code. */ | |
356 | #define __param_check(name, p, type) \ | |
0283f9a5 | 357 | static inline type __always_unused *__check_##name(void) { return(p); } |
1da177e4 | 358 | |
91f9d330 JN |
359 | /** |
360 | * param_check_unsafe - Warn and taint the kernel if setting dangerous options. | |
361 | * | |
362 | * This gets called from all the standard param setters, but can be used from | |
363 | * custom setters as well. | |
364 | */ | |
365 | static inline void | |
366 | param_check_unsafe(const struct kernel_param *kp) | |
367 | { | |
368 | if (kp->flags & KERNEL_PARAM_FL_UNSAFE) { | |
369 | pr_warn("Setting dangerous option %s - tainting kernel\n", | |
370 | kp->name); | |
371 | add_taint(TAINT_USER, LOCKDEP_STILL_OK); | |
372 | } | |
373 | } | |
374 | ||
9bbb9e5a RR |
375 | extern struct kernel_param_ops param_ops_byte; |
376 | extern int param_set_byte(const char *val, const struct kernel_param *kp); | |
377 | extern int param_get_byte(char *buffer, const struct kernel_param *kp); | |
1da177e4 LT |
378 | #define param_check_byte(name, p) __param_check(name, p, unsigned char) |
379 | ||
9bbb9e5a RR |
380 | extern struct kernel_param_ops param_ops_short; |
381 | extern int param_set_short(const char *val, const struct kernel_param *kp); | |
382 | extern int param_get_short(char *buffer, const struct kernel_param *kp); | |
1da177e4 LT |
383 | #define param_check_short(name, p) __param_check(name, p, short) |
384 | ||
9bbb9e5a RR |
385 | extern struct kernel_param_ops param_ops_ushort; |
386 | extern int param_set_ushort(const char *val, const struct kernel_param *kp); | |
387 | extern int param_get_ushort(char *buffer, const struct kernel_param *kp); | |
1da177e4 LT |
388 | #define param_check_ushort(name, p) __param_check(name, p, unsigned short) |
389 | ||
9bbb9e5a RR |
390 | extern struct kernel_param_ops param_ops_int; |
391 | extern int param_set_int(const char *val, const struct kernel_param *kp); | |
392 | extern int param_get_int(char *buffer, const struct kernel_param *kp); | |
1da177e4 LT |
393 | #define param_check_int(name, p) __param_check(name, p, int) |
394 | ||
9bbb9e5a RR |
395 | extern struct kernel_param_ops param_ops_uint; |
396 | extern int param_set_uint(const char *val, const struct kernel_param *kp); | |
397 | extern int param_get_uint(char *buffer, const struct kernel_param *kp); | |
1da177e4 LT |
398 | #define param_check_uint(name, p) __param_check(name, p, unsigned int) |
399 | ||
9bbb9e5a RR |
400 | extern struct kernel_param_ops param_ops_long; |
401 | extern int param_set_long(const char *val, const struct kernel_param *kp); | |
402 | extern int param_get_long(char *buffer, const struct kernel_param *kp); | |
1da177e4 LT |
403 | #define param_check_long(name, p) __param_check(name, p, long) |
404 | ||
9bbb9e5a RR |
405 | extern struct kernel_param_ops param_ops_ulong; |
406 | extern int param_set_ulong(const char *val, const struct kernel_param *kp); | |
407 | extern int param_get_ulong(char *buffer, const struct kernel_param *kp); | |
1da177e4 LT |
408 | #define param_check_ulong(name, p) __param_check(name, p, unsigned long) |
409 | ||
b4210b81 HR |
410 | extern struct kernel_param_ops param_ops_ullong; |
411 | extern int param_set_ullong(const char *val, const struct kernel_param *kp); | |
412 | extern int param_get_ullong(char *buffer, const struct kernel_param *kp); | |
413 | #define param_check_ullong(name, p) __param_check(name, p, unsigned long long) | |
414 | ||
9bbb9e5a RR |
415 | extern struct kernel_param_ops param_ops_charp; |
416 | extern int param_set_charp(const char *val, const struct kernel_param *kp); | |
417 | extern int param_get_charp(char *buffer, const struct kernel_param *kp); | |
1da177e4 LT |
418 | #define param_check_charp(name, p) __param_check(name, p, char *) |
419 | ||
72db395f | 420 | /* We used to allow int as well as bool. We're taking that away! */ |
9bbb9e5a RR |
421 | extern struct kernel_param_ops param_ops_bool; |
422 | extern int param_set_bool(const char *val, const struct kernel_param *kp); | |
423 | extern int param_get_bool(char *buffer, const struct kernel_param *kp); | |
72db395f | 424 | #define param_check_bool(name, p) __param_check(name, p, bool) |
1da177e4 | 425 | |
9bbb9e5a RR |
426 | extern struct kernel_param_ops param_ops_invbool; |
427 | extern int param_set_invbool(const char *val, const struct kernel_param *kp); | |
428 | extern int param_get_invbool(char *buffer, const struct kernel_param *kp); | |
9a71af2c | 429 | #define param_check_invbool(name, p) __param_check(name, p, bool) |
1da177e4 | 430 | |
69116f27 RR |
431 | /* An int, which can only be set like a bool (though it shows as an int). */ |
432 | extern struct kernel_param_ops param_ops_bint; | |
433 | extern int param_set_bint(const char *val, const struct kernel_param *kp); | |
434 | #define param_get_bint param_get_int | |
435 | #define param_check_bint param_check_int | |
436 | ||
546970bc RR |
437 | /** |
438 | * module_param_array - a parameter which is an array of some type | |
439 | * @name: the name of the array variable | |
440 | * @type: the type, as per module_param() | |
441 | * @nump: optional pointer filled in with the number written | |
442 | * @perm: visibility in sysfs | |
443 | * | |
444 | * Input and output are as comma-separated values. Commas inside values | |
445 | * don't work properly (eg. an array of charp). | |
446 | * | |
447 | * ARRAY_SIZE(@name) is used to determine the number of elements in the | |
448 | * array, so the definition must be visible. | |
449 | */ | |
450 | #define module_param_array(name, type, nump, perm) \ | |
451 | module_param_array_named(name, name, type, nump, perm) | |
452 | ||
453 | /** | |
454 | * module_param_array_named - renamed parameter which is an array of some type | |
455 | * @name: a valid C identifier which is the parameter name | |
456 | * @array: the name of the array variable | |
457 | * @type: the type, as per module_param() | |
458 | * @nump: optional pointer filled in with the number written | |
459 | * @perm: visibility in sysfs | |
460 | * | |
461 | * This exposes a different name than the actual variable name. See | |
462 | * module_param_named() for why this might be necessary. | |
463 | */ | |
1da177e4 | 464 | #define module_param_array_named(name, array, type, nump, perm) \ |
bafeafea | 465 | param_check_##type(name, &(array)[0]); \ |
22e48eaf | 466 | static const struct kparam_array __param_arr_##name \ |
c5be0b2e RK |
467 | = { .max = ARRAY_SIZE(array), .num = nump, \ |
468 | .ops = ¶m_ops_##type, \ | |
469 | .elemsize = sizeof(array[0]), .elem = array }; \ | |
fddd5201 | 470 | __module_param_call(MODULE_PARAM_PREFIX, name, \ |
9bbb9e5a | 471 | ¶m_array_ops, \ |
fddd5201 | 472 | .arr = &__param_arr_##name, \ |
91f9d330 | 473 | perm, -1, 0); \ |
1da177e4 LT |
474 | __MODULE_PARM_TYPE(name, "array of " #type) |
475 | ||
9bbb9e5a | 476 | extern struct kernel_param_ops param_array_ops; |
1da177e4 | 477 | |
9bbb9e5a RR |
478 | extern struct kernel_param_ops param_ops_string; |
479 | extern int param_set_copystring(const char *val, const struct kernel_param *); | |
480 | extern int param_get_string(char *buffer, const struct kernel_param *kp); | |
1da177e4 | 481 | |
b634d130 | 482 | /* for exporting parameters in /sys/module/.../parameters */ |
1da177e4 LT |
483 | |
484 | struct module; | |
485 | ||
ef665c1a | 486 | #if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES) |
1da177e4 | 487 | extern int module_param_sysfs_setup(struct module *mod, |
9bbb9e5a | 488 | const struct kernel_param *kparam, |
1da177e4 LT |
489 | unsigned int num_params); |
490 | ||
491 | extern void module_param_sysfs_remove(struct module *mod); | |
ef665c1a RD |
492 | #else |
493 | static inline int module_param_sysfs_setup(struct module *mod, | |
9bbb9e5a | 494 | const struct kernel_param *kparam, |
ef665c1a RD |
495 | unsigned int num_params) |
496 | { | |
497 | return 0; | |
498 | } | |
499 | ||
500 | static inline void module_param_sysfs_remove(struct module *mod) | |
501 | { } | |
502 | #endif | |
1da177e4 LT |
503 | |
504 | #endif /* _LINUX_MODULE_PARAMS_H */ |