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