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 void 103 sysfs_remove_file(struct kobject *, const struct attribute *); 104 105 extern int 106 sysfs_create_link(struct kobject * kobj, struct kobject * target, char * name); 107 108 extern void 109 sysfs_remove_link(struct kobject *, char * name); 110 111 int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr); 112 int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr); 113 114 int sysfs_create_group(struct kobject *, const struct attribute_group *); 115 void sysfs_remove_group(struct kobject *, const struct attribute_group *); 116 117 #else /* CONFIG_SYSFS */ 118 119 static inline int sysfs_create_dir(struct kobject * k) 120 { 121 return 0; 122 } 123 124 static inline void sysfs_remove_dir(struct kobject * k) 125 { 126 ; 127 } 128 129 static inline int sysfs_rename_dir(struct kobject * k, const char *new_name) 130 { 131 return 0; 132 } 133 134 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a) 135 { 136 return 0; 137 } 138 139 static inline int sysfs_update_file(struct kobject * k, const struct attribute * a) 140 { 141 return 0; 142 } 143 144 static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a) 145 { 146 ; 147 } 148 149 static inline int sysfs_create_link(struct kobject * k, struct kobject * t, char * n) 150 { 151 return 0; 152 } 153 154 static inline void sysfs_remove_link(struct kobject * k, char * name) 155 { 156 ; 157 } 158 159 160 static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a) 161 { 162 return 0; 163 } 164 165 static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a) 166 { 167 return 0; 168 } 169 170 static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g) 171 { 172 return 0; 173 } 174 175 static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g) 176 { 177 ; 178 } 179 180 #endif /* CONFIG_SYSFS */ 181 182 #endif /* _SYSFS_H_ */ 183