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 char * name; 20 struct module * owner; 21 mode_t mode; 22 }; 23 24 struct attribute_group { 25 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 }; 77 78 #define SYSFS_ROOT 0x0001 79 #define SYSFS_DIR 0x0002 80 #define SYSFS_KOBJ_ATTR 0x0004 81 #define SYSFS_KOBJ_BIN_ATTR 0x0008 82 #define SYSFS_KOBJ_LINK 0x0020 83 #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK) 84 85 #ifdef CONFIG_SYSFS 86 87 extern int 88 sysfs_create_dir(struct kobject *); 89 90 extern void 91 sysfs_remove_dir(struct kobject *); 92 93 extern int 94 sysfs_rename_dir(struct kobject *, const char *new_name); 95 96 extern int 97 sysfs_create_file(struct kobject *, const struct attribute *); 98 99 extern int 100 sysfs_update_file(struct kobject *, const struct attribute *); 101 102 extern int 103 sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode); 104 105 extern void 106 sysfs_remove_file(struct kobject *, const struct attribute *); 107 108 extern int 109 sysfs_create_link(struct kobject * kobj, struct kobject * target, char * name); 110 111 extern void 112 sysfs_remove_link(struct kobject *, char * name); 113 114 int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr); 115 int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr); 116 117 int sysfs_create_group(struct kobject *, const struct attribute_group *); 118 void sysfs_remove_group(struct kobject *, const struct attribute_group *); 119 120 #else /* CONFIG_SYSFS */ 121 122 static inline int sysfs_create_dir(struct kobject * k) 123 { 124 return 0; 125 } 126 127 static inline void sysfs_remove_dir(struct kobject * k) 128 { 129 ; 130 } 131 132 static inline int sysfs_rename_dir(struct kobject * k, const char *new_name) 133 { 134 return 0; 135 } 136 137 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a) 138 { 139 return 0; 140 } 141 142 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a) 143 { 144 return 0; 145 } 146 static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode) 147 { 148 return 0; 149 } 150 151 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a) 152 { 153 ; 154 } 155 156 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, char * n) 157 { 158 return 0; 159 } 160 161 static inline void sysfs_remove_link(struct kobject * k, char * name) 162 { 163 ; 164 } 165 166 167 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a) 168 { 169 return 0; 170 } 171 172 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a) 173 { 174 return 0; 175 } 176 177 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g) 178 { 179 return 0; 180 } 181 182 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g) 183 { 184 ; 185 } 186 187 #endif /* CONFIG_SYSFS */ 188 189 #endif /* _SYSFS_H_ */ 190