sysfs.h
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上传日期:2009-04-28
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- /*
- * sysfs.h - definitions for the device driver filesystem
- *
- * Copyright (c) 2001,2002 Patrick Mochel
- * Copyright (c) 2004 Silicon Graphics, Inc.
- *
- * Please see Documentation/filesystems/sysfs.txt for more information.
- */
- #ifndef _SYSFS_H_
- #define _SYSFS_H_
- #include <asm/atomic.h>
- struct kobject;
- struct module;
- struct attribute {
- const char * name;
- struct module * owner;
- mode_t mode;
- };
- struct attribute_group {
- const char * name;
- struct attribute ** attrs;
- };
- /**
- * Use these macros to make defining attributes easier. See include/linux/device.h
- * for examples..
- */
- #define __ATTR(_name,_mode,_show,_store) {
- .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE },
- .show = _show,
- .store = _store,
- }
- #define __ATTR_RO(_name) {
- .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE },
- .show = _name##_show,
- }
- #define __ATTR_NULL { .attr = { .name = NULL } }
- #define attr_name(_attr) (_attr).attr.name
- struct vm_area_struct;
- struct bin_attribute {
- struct attribute attr;
- size_t size;
- void *private;
- ssize_t (*read)(struct kobject *, char *, loff_t, size_t);
- ssize_t (*write)(struct kobject *, char *, loff_t, size_t);
- int (*mmap)(struct kobject *, struct bin_attribute *attr,
- struct vm_area_struct *vma);
- };
- struct sysfs_ops {
- ssize_t (*show)(struct kobject *, struct attribute *,char *);
- ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
- };
- struct sysfs_dirent {
- atomic_t s_count;
- struct list_head s_sibling;
- struct list_head s_children;
- void * s_element;
- int s_type;
- umode_t s_mode;
- struct dentry * s_dentry;
- struct iattr * s_iattr;
- };
- #define SYSFS_ROOT 0x0001
- #define SYSFS_DIR 0x0002
- #define SYSFS_KOBJ_ATTR 0x0004
- #define SYSFS_KOBJ_BIN_ATTR 0x0008
- #define SYSFS_KOBJ_LINK 0x0020
- #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK)
- #ifdef CONFIG_SYSFS
- extern int
- sysfs_create_dir(struct kobject *);
- extern void
- sysfs_remove_dir(struct kobject *);
- extern int
- sysfs_rename_dir(struct kobject *, const char *new_name);
- extern int
- sysfs_create_file(struct kobject *, const struct attribute *);
- extern int
- sysfs_update_file(struct kobject *, const struct attribute *);
- extern int
- sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode);
- extern void
- sysfs_remove_file(struct kobject *, const struct attribute *);
- extern int
- sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name);
- extern void
- sysfs_remove_link(struct kobject *, const char * name);
- int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr);
- int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr);
- int sysfs_create_group(struct kobject *, const struct attribute_group *);
- void sysfs_remove_group(struct kobject *, const struct attribute_group *);
- #else /* CONFIG_SYSFS */
- static inline int sysfs_create_dir(struct kobject * k)
- {
- return 0;
- }
- static inline void sysfs_remove_dir(struct kobject * k)
- {
- ;
- }
- static inline int sysfs_rename_dir(struct kobject * k, const char *new_name)
- {
- return 0;
- }
- static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)
- {
- return 0;
- }
- static inline int sysfs_update_file(struct kobject * k, const struct attribute * a)
- {
- return 0;
- }
- static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
- {
- return 0;
- }
- static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a)
- {
- ;
- }
- static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n)
- {
- return 0;
- }
- static inline void sysfs_remove_link(struct kobject * k, const char * name)
- {
- ;
- }
- static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a)
- {
- return 0;
- }
- static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a)
- {
- return 0;
- }
- static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g)
- {
- return 0;
- }
- static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g)
- {
- ;
- }
- #endif /* CONFIG_SYSFS */
- #endif /* _SYSFS_H_ */