diff options
Diffstat (limited to 'include/linux/moduleparam.h')
| -rw-r--r-- | include/linux/moduleparam.h | 123 |
1 files changed, 75 insertions, 48 deletions
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h index 82a9124f7d7..02e5090ce32 100644 --- a/include/linux/moduleparam.h +++ b/include/linux/moduleparam.h @@ -31,20 +31,21 @@ static const char __module_cat(name,__LINE__)[] \ struct kernel_param; -/* Returns 0, or -errno. arg is in kp->arg. */ -typedef int (*param_set_fn)(const char *val, struct kernel_param *kp); -/* Returns length written or -errno. Buffer is 4k (ie. be short!) */ -typedef int (*param_get_fn)(char *buffer, struct kernel_param *kp); +struct kernel_param_ops { + /* 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); +}; /* Flag bits for kernel_param.flags */ #define KPARAM_ISBOOL 2 struct kernel_param { const char *name; + const struct kernel_param_ops *ops; u16 perm; u16 flags; - param_set_fn set; - param_get_fn get; union { void *arg; const struct kparam_string *str; @@ -63,8 +64,7 @@ struct kparam_array { unsigned int max; unsigned int *num; - param_set_fn set; - param_get_fn get; + const struct kernel_param_ops *ops; unsigned int elemsize; void *elem; }; @@ -83,7 +83,7 @@ struct kparam_array parameters. perm sets the visibility in sysfs: 000 means it's not there, read bits mean it's readable, write bits mean it's writable. */ -#define __module_param_call(prefix, name, set, get, arg, isbool, perm) \ +#define __module_param_call(prefix, name, ops, arg, isbool, perm) \ /* Default value instead of permissions? */ \ static int __param_perm_check_##name __attribute__((unused)) = \ BUILD_BUG_ON_ZERO((perm) < 0 || (perm) > 0777 || ((perm) & 2)) \ @@ -92,20 +92,37 @@ struct kparam_array static struct kernel_param __moduleparam_const __param_##name \ __used \ __attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \ - = { __param_str_##name, perm, isbool ? KPARAM_ISBOOL : 0, \ - set, get, { arg } } + = { __param_str_##name, ops, perm, isbool ? KPARAM_ISBOOL : 0, \ + { arg } } + +/* Obsolete - use module_param_cb() */ +#define module_param_call(name, set, get, arg, perm) \ + static struct kernel_param_ops __param_ops_##name = \ + { (void *)set, (void *)get }; \ + __module_param_call(MODULE_PARAM_PREFIX, \ + name, &__param_ops_##name, arg, \ + __same_type(*(arg), bool), \ + (perm) + sizeof(__check_old_set_param(set))*0) + +/* We don't get oldget: it's often a new-style param_get_uint, etc. */ +static inline int +__check_old_set_param(int (*oldset)(const char *, struct kernel_param *)) +{ + return 0; +} -#define module_param_call(name, set, get, arg, perm) \ +#define module_param_cb(name, ops, arg, perm) \ __module_param_call(MODULE_PARAM_PREFIX, \ - name, set, get, arg, \ - __same_type(*(arg), bool), perm) + name, ops, arg, __same_type(*(arg), bool), perm) -/* Helper functions: type is byte, short, ushort, int, uint, long, - ulong, charp, bool or invbool, or XXX if you define param_get_XXX, - param_set_XXX and param_check_XXX. */ +/* + * Helper functions: type is byte, short, ushort, int, uint, long, + * ulong, charp, bool or invbool, or XXX if you define param_ops_XXX + * and param_check_XXX. + */ #define module_param_named(name, value, type, perm) \ param_check_##type(name, &(value)); \ - module_param_call(name, param_set_##type, param_get_##type, &value, perm); \ + module_param_cb(name, ¶m_ops_##type, &value, perm); \ __MODULE_PARM_TYPE(name, #type) #define module_param(name, type, perm) \ @@ -126,7 +143,7 @@ struct kparam_array */ #define core_param(name, var, type, perm) \ param_check_##type(name, &(var)); \ - __module_param_call("", name, param_set_##type, param_get_##type, \ + __module_param_call("", name, ¶m_ops_##type, \ &var, __same_type(var, bool), perm) #endif /* !MODULE */ @@ -135,7 +152,7 @@ struct kparam_array static const struct kparam_string __param_string_##name \ = { len, string }; \ __module_param_call(MODULE_PARAM_PREFIX, name, \ - param_set_copystring, param_get_string, \ + ¶m_ops_string, \ .str = &__param_string_##name, 0, perm); \ __MODULE_PARM_TYPE(name, "string") @@ -162,41 +179,50 @@ static inline void destroy_params(const struct kernel_param *params, #define __param_check(name, p, type) \ static inline type *__check_##name(void) { return(p); } -extern int param_set_byte(const char *val, struct kernel_param *kp); -extern int param_get_byte(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_byte; +extern int param_set_byte(const char *val, const struct kernel_param *kp); +extern int param_get_byte(char *buffer, const struct kernel_param *kp); #define param_check_byte(name, p) __param_check(name, p, unsigned char) -extern int param_set_short(const char *val, struct kernel_param *kp); -extern int param_get_short(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_short; +extern int param_set_short(const char *val, const struct kernel_param *kp); +extern int param_get_short(char *buffer, const struct kernel_param *kp); #define param_check_short(name, p) __param_check(name, p, short) -extern int param_set_ushort(const char *val, struct kernel_param *kp); -extern int param_get_ushort(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_ushort; +extern int param_set_ushort(const char *val, const struct kernel_param *kp); +extern int param_get_ushort(char *buffer, const struct kernel_param *kp); #define param_check_ushort(name, p) __param_check(name, p, unsigned short) -extern int param_set_int(const char *val, struct kernel_param *kp); -extern int param_get_int(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_int; +extern int param_set_int(const char *val, const struct kernel_param *kp); +extern int param_get_int(char *buffer, const struct kernel_param *kp); #define param_check_int(name, p) __param_check(name, p, int) -extern int param_set_uint(const char *val, struct kernel_param *kp); -extern int param_get_uint(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_uint; +extern int param_set_uint(const char *val, const struct kernel_param *kp); +extern int param_get_uint(char *buffer, const struct kernel_param *kp); #define param_check_uint(name, p) __param_check(name, p, unsigned int) -extern int param_set_long(const char *val, struct kernel_param *kp); -extern int param_get_long(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_long; +extern int param_set_long(const char *val, const struct kernel_param *kp); +extern int param_get_long(char *buffer, const struct kernel_param *kp); #define param_check_long(name, p) __param_check(name, p, long) -extern int param_set_ulong(const char *val, struct kernel_param *kp); -extern int param_get_ulong(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_ulong; +extern int param_set_ulong(const char *val, const struct kernel_param *kp); +extern int param_get_ulong(char *buffer, const struct kernel_param *kp); #define param_check_ulong(name, p) __param_check(name, p, unsigned long) -extern int param_set_charp(const char *val, struct kernel_param *kp); -extern int param_get_charp(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_charp; +extern int param_set_charp(const char *val, const struct kernel_param *kp); +extern int param_get_charp(char *buffer, const struct kernel_param *kp); #define param_check_charp(name, p) __param_check(name, p, char *) /* For historical reasons "bool" parameters can be (unsigned) "int". */ -extern int param_set_bool(const char *val, struct kernel_param *kp); -extern int param_get_bool(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_bool; +extern int param_set_bool(const char *val, const struct kernel_param *kp); +extern int param_get_bool(char *buffer, const struct kernel_param *kp); #define param_check_bool(name, p) \ static inline void __check_##name(void) \ { \ @@ -205,17 +231,18 @@ extern int param_get_bool(char *buffer, struct kernel_param *kp); !__same_type(*(p), int)); \ } -extern int param_set_invbool(const char *val, struct kernel_param *kp); -extern int param_get_invbool(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_invbool; +extern int param_set_invbool(const char *val, const struct kernel_param *kp); +extern int param_get_invbool(char *buffer, const struct kernel_param *kp); #define param_check_invbool(name, p) __param_check(name, p, bool) /* Comma-separated array: *nump is set to number they actually specified. */ #define module_param_array_named(name, array, type, nump, perm) \ static const struct kparam_array __param_arr_##name \ - = { ARRAY_SIZE(array), nump, param_set_##type, param_get_##type,\ + = { ARRAY_SIZE(array), nump, ¶m_ops_##type, \ sizeof(array[0]), array }; \ __module_param_call(MODULE_PARAM_PREFIX, name, \ - param_array_set, param_array_get, \ + ¶m_array_ops, \ .arr = &__param_arr_##name, \ __same_type(array[0], bool), perm); \ __MODULE_PARM_TYPE(name, "array of " #type) @@ -223,11 +250,11 @@ extern int param_get_invbool(char *buffer, struct kernel_param *kp); #define module_param_array(name, type, nump, perm) \ module_param_array_named(name, name, type, nump, perm) -extern int param_array_set(const char *val, struct kernel_param *kp); -extern int param_array_get(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_array_ops; -extern int param_set_copystring(const char *val, struct kernel_param *kp); -extern int param_get_string(char *buffer, struct kernel_param *kp); +extern struct kernel_param_ops param_ops_string; +extern int param_set_copystring(const char *val, const struct kernel_param *); +extern int param_get_string(char *buffer, const struct kernel_param *kp); /* for exporting parameters in /sys/parameters */ @@ -235,13 +262,13 @@ struct module; #if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES) extern int module_param_sysfs_setup(struct module *mod, - struct kernel_param *kparam, + const struct kernel_param *kparam, unsigned int num_params); extern void module_param_sysfs_remove(struct module *mod); #else static inline int module_param_sysfs_setup(struct module *mod, - struct kernel_param *kparam, + const struct kernel_param *kparam, unsigned int num_params) { return 0; |