0 "l4()P@7rS h0 _I|Mjq؂File not found. File not found. + l4( (  fB-  p?_I|+? /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_MODULE_PARAMS_H #define _LINUX_MODULE_PARAMS_H /* (C) Copyright 2001, 2002 Rusty Russell IBM Corporation */ #include #include #include /* You can override this manually, but generally this should match the module name. */ #ifdef MODULE #define MODULE_PARAM_PREFIX /* empty */ #define __MODULE_INFO_PREFIX /* empty */ #else #define MODULE_PARAM_PREFIX KBUILD_MODNAME "." /* We cannot use MODULE_PARAM_PREFIX because some modules override it. */ #define __MODULE_INFO_PREFIX KBUILD_MODNAME "." #endif /* Chosen so that structs with an unsigned long line up. */ #define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long)) #define __MODULE_INFO(tag, name, info) \ static const char __UNIQUE_ID(name)[] \ __used __section(".modinfo") __aligned(1) \ = __MODULE_INFO_PREFIX __stringify(tag) "=" info #define __MODULE_PARM_TYPE(name, _type) \ __MODULE_INFO(parmtype, name##type, #name ":" _type) /* One for each parameter, describing how to use it. Some files do multiple of these per line, so can't just use MODULE_INFO. */ #define MODULE_PARM_DESC(_parm, desc) \ __MODULE_INFO(parm, _parm, #_parm ":" desc) struct kernel_param; /* * Flags available for kernel_param_ops * * NOARG - the parameter allows for no argument (foo instead of foo=1) */ enum { KERNEL_PARAM_OPS_FL_NOARG = (1 << 0) }; struct kernel_param_ops { /* How the ops should behave */ unsigned int flags; /* Returns 0, or -errno. arg is in kp->arg. */ int (*set)(const char *val, const struct kernel_param *kp); /* Returns length written or -errno. Buffer is 4k (ie. be short!) */ int (*get)(char *buffer, const struct kernel_param *kp); /* Optional function to free kp->arg when module unloaded. */ void (*free)(void *arg); }; /* * Flags available for kernel_param * * UNSAFE - the parameter is dangerous and setting it will taint the kernel * HWPARAM - Hardware param not permitted in lockdown mode */ enum { KERNEL_PARAM_FL_UNSAFE = (1 << 0), KERNEL_PARAM_FL_HWPARAM = (1 << 1), }; struct kernel_param { const char *name; struct module *mod; const struct kernel_param_ops *ops; const u16 perm; s8 level; u8 flags; union { void *arg; const struct kparam_string *str; const struct kparam_array *arr; }; }; extern const struct kernel_param __start___param[], __stop___param[]; /* Special one for strings we want to copy into */ struct kparam_string { unsigned int maxlen; char *string; }; /* Special one for arrays */ struct kparam_array { unsigned int max; unsigned int elemsize; unsigned int *num; const struct kernel_param_ops *ops; void *elem; }; /** * module_param - typesafe helper for a module/cmdline parameter * @name: the variable to alter, and exposed parameter name. * @type: the type of the parameter * @perm: visibility in sysfs. * * @name becomes the module parameter, or (prefixed by KBUILD_MODNAME and a * ".") the kernel commandline parameter. Note that - is changed to _, so * the user can use "foo-bar=1" even for variable "foo_bar". * * @perm is 0 if the variable is not to appear in sysfs, or 0444 * for world-readable, 0644 for root-writable, etc. Note that if it * is writable, you may need to use kernel_param_lock() around * accesses (esp. charp, which can be kfreed when it changes). * * The @type is simply pasted to refer to a param_ops_##type and a * param_check_##type: for convenience many standard types are provided but * you can create your own by defining those variables. * * Standard types are: * byte, hexint, short, ushort, int, uint, long, ulong * charp: a character pointer * bool: a bool, values 0/1, y/n, Y/N. * invbool: the above, only sense-reversed (N = true). */ #define module_param(name, type, perm) \ module_param_named(name, name, type, perm) /**