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 15 struct kobject; 16 struct module; 17 18 struct attribute { 19 const char * name; 20 struct module * owner; 21 mode_t mode; 22 }; 23 24 struct 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 51 struct vm_area_struct; 52 53 struct 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 63 struct 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 68 struct 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_LINK 0x0020 85 #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK) 86 87 #ifdef CONFIG_SYSFS 88 89 extern int 90 sysfs_create_dir(struct kobject *); 91 92 extern void 93 sysfs_remove_dir(struct kobject *); 94 95 extern int 96 sysfs_rename_dir(struct kobject *, const char *new_name); 97 98 extern int 99 sysfs_create_file(struct kobject *, const struct attribute *); 100 101 extern int 102 sysfs_update_file(struct kobject *, const struct attribute *); 103 104 extern int 105 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode); 106 107 extern void 108 sysfs_remove_file(struct kobject *, const struct attribute *); 109 110 extern int 111 sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name); 112 113 extern void 114 sysfs_remove_link(struct kobject *, const char * name); 115 116 int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr); 117 int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr); 118 119 int sysfs_create_group(struct kobject *, const struct attribute_group *); 120 void sysfs_remove_group(struct kobject *, const struct attribute_group *); 121 void sysfs_notify(struct kobject * k, char *dir, char *attr); 122 123 #else /* CONFIG_SYSFS */ 124 125 static inline int sysfs_create_dir(struct kobject * k) 126 { 127 return 0; 128 } 129 130 static inline void sysfs_remove_dir(struct kobject * k) 131 { 132 ; 133 } 134 135 static inline int sysfs_rename_dir(struct kobject * k, const char *new_name) 136 { 137 return 0; 138 } 139 140 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a) 141 { 142 return 0; 143 } 144 145 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a) 146 { 147 return 0; 148 } 149 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode) 150 { 151 return 0; 152 } 153 154 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a) 155 { 156 ; 157 } 158 159 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n) 160 { 161 return 0; 162 } 163 164 static inline void sysfs_remove_link(struct kobject * k, const char * name) 165 { 166 ; 167 } 168 169 170 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a) 171 { 172 return 0; 173 } 174 175 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a) 176 { 177 return 0; 178 } 179 180 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g) 181 { 182 return 0; 183 } 184 185 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g) 186 { 187 ; 188 } 189 190 static inline void sysfs_notify(struct kobject * k, char *dir, char *attr) 191 { 192 } 193 194 #endif /* CONFIG_SYSFS */ 195 196 #endif /* _SYSFS_H_ */ 197