1/* 2 * sysfs.h - definitions for the device driver filesystem 3 * 4 * Copyright (c) 2001,2002 Patrick Mochel 5 * Copyright (c) 2004 Silicon Graphics, Inc. 6 * 7 * Please see Documentation/filesystems/sysfs.txt for more information. 8 */ 9 10#ifndef _SYSFS_H_ 11#define _SYSFS_H_ 12 13#include <asm/atomic.h> 14 15struct kobject; 16struct module; 17 18struct attribute { 19 const char * name; 20 struct module * owner; 21 mode_t mode; 22}; 23 24struct attribute_group { 25 const char * name; 26 struct attribute ** attrs; 27}; 28 29 30 31/** 32 * Use these macros to make defining attributes easier. See include/linux/device.h 33 * for examples.. 34 */ 35 36#define __ATTR(_name,_mode,_show,_store) { \ 37 .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \ 38 .show = _show, \ 39 .store = _store, \ 40} 41 42#define __ATTR_RO(_name) { \ 43 .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \ 44 .show = _name##_show, \ 45} 46 47#define __ATTR_NULL { .attr = { .name = NULL } } 48 49#define attr_name(_attr) (_attr).attr.name 50 51struct vm_area_struct; 52 53struct bin_attribute { 54 struct attribute attr; 55 size_t size; 56 void *private; 57 ssize_t (*read)(struct kobject *, char *, loff_t, size_t); 58 ssize_t (*write)(struct kobject *, char *, loff_t, size_t); 59 int (*mmap)(struct kobject *, struct bin_attribute *attr, 60 struct vm_area_struct *vma); 61}; 62 63struct sysfs_ops { 64 ssize_t (*show)(struct kobject *, struct attribute *,char *); 65 ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t); 66}; 67 68struct sysfs_dirent { 69 atomic_t s_count; 70 struct list_head s_sibling; 71 struct list_head s_children; 72 void * s_element; 73 int s_type; 74 umode_t s_mode; 75 struct dentry * s_dentry; 76 struct iattr * s_iattr; 77 atomic_t s_event; 78}; 79 80#define SYSFS_ROOT 0x0001 81#define SYSFS_DIR 0x0002 82#define SYSFS_KOBJ_ATTR 0x0004 83#define SYSFS_KOBJ_BIN_ATTR 0x0008 84#define SYSFS_KOBJ_DEVICE 0x0010 85#define SYSFS_KOBJ_LINK 0x0020 86#define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_DEVICE | SYSFS_KOBJ_LINK) 87 88#ifdef CONFIG_SYSFS 89 90extern int 91sysfs_create_dir(struct kobject *); 92 93extern void 94sysfs_remove_dir(struct kobject *); 95 96extern int 97sysfs_rename_dir(struct kobject *, const char *new_name); 98 99extern int 100sysfs_create_file(struct kobject *, const struct attribute *); 101 102extern int 103sysfs_update_file(struct kobject *, const struct attribute *); 104 105extern int 106sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode); 107 108extern void 109sysfs_remove_file(struct kobject *, const struct attribute *); 110 111extern int 112sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name); 113 114extern void 115sysfs_remove_link(struct kobject *, const char * name); 116 117int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr); 118int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr); 119 120int sysfs_create_group(struct kobject *, const struct attribute_group *); 121void sysfs_remove_group(struct kobject *, const struct attribute_group *); 122void sysfs_notify(struct kobject * k, char *dir, char *attr); 123 124void sysfs_create_device(struct kobject *, dev_t dev, mode_t mode); 125 126#else /* CONFIG_SYSFS */ 127 128static inline int sysfs_create_dir(struct kobject * k) 129{ 130 return 0; 131} 132 133static inline void sysfs_remove_dir(struct kobject * k) 134{ 135 ; 136} 137 138static inline int sysfs_rename_dir(struct kobject * k, const char *new_name) 139{ 140 return 0; 141} 142 143static inline int sysfs_create_file(struct kobject * k, const struct attribute * a) 144{ 145 return 0; 146} 147 148static inline int sysfs_update_file(struct kobject * k, const struct attribute * a) 149{ 150 return 0; 151} 152static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode) 153{ 154 return 0; 155} 156 157static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a) 158{ 159 ; 160} 161 162static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n) 163{ 164 return 0; 165} 166 167static inline void sysfs_remove_link(struct kobject * k, const char * name) 168{ 169 ; 170} 171 172 173static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a) 174{ 175 return 0; 176} 177 178static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a) 179{ 180 return 0; 181} 182 183static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g) 184{ 185 return 0; 186} 187 188static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g) 189{ 190 ; 191} 192 193static inline void sysfs_notify(struct kobject * k, char *dir, char *attr) 194{ 195} 196 197static inline void sysfs_create_device(struct kobject * k, dev_t d, mode_t m) 198{ 199 ; 200} 201 202#endif /* CONFIG_SYSFS */ 203 204#endif /* _SYSFS_H_ */ 205