1 files changed, 345 insertions, 0 deletions
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
new file mode 100644
index 00000000..e2696d76
--- /dev/null
+++ b/include/linux/sysfs.h
@@ -0,0 +1,345 @@
+/*
+ * sysfs.h - definitions for the device driver filesystem
+ *
+ * Copyright (c) 2001,2002 Patrick Mochel
+ * Copyright (c) 2004 Silicon Graphics, Inc.
+ * Copyright (c) 2007 SUSE Linux Products GmbH
+ * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
+ *
+ * Please see Documentation/filesystems/sysfs.txt for more information.
+ */
+
+#ifndef _SYSFS_H_
+#define _SYSFS_H_
+
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/lockdep.h>
+#include <linux/kobject_ns.h>
+#include <asm/atomic.h>
+
+struct kobject;
+struct module;
+enum kobj_ns_type;
+
+struct attribute {
+	const char		*name;
+	mode_t			mode;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+	struct lock_class_key	*key;
+	struct lock_class_key	skey;
+#endif
+};
+
+/**
+ *	sysfs_attr_init - initialize a dynamically allocated sysfs attribute
+ *	@attr: struct attribute to initialize
+ *
+ *	Initialize a dynamically allocated struct attribute so we can
+ *	make lockdep happy.  This is a new requirement for attributes
+ *	and initially this is only needed when lockdep is enabled.
+ *	Lockdep gives a nice error when your attribute is added to
+ *	sysfs if you don't have this.
+ */
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+#define sysfs_attr_init(attr)				\
+do {							\
+	static struct lock_class_key __key;		\
+							\
+	(attr)->key = &__key;				\
+} while(0)
+#else
+#define sysfs_attr_init(attr) do {} while(0)
+#endif
+
+struct attribute_group {
+	const char		*name;
+	mode_t			(*is_visible)(struct kobject *,
+					      struct attribute *, int);
+	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 },	\
+	.show	= _show,					\
+	.store	= _store,					\
+}
+
+#define __ATTR_RO(_name) { \
+	.attr	= { .name = __stringify(_name), .mode = 0444 },	\
+	.show	= _name##_show,					\
+}
+
+#define __ATTR_NULL { .attr = { .name = NULL } }
+
+#define attr_name(_attr) (_attr).attr.name
+
+struct file;
+struct vm_area_struct;
+
+struct bin_attribute {
+	struct attribute	attr;
+	size_t			size;
+	void			*private;
+	ssize_t (*read)(struct file *, struct kobject *, struct bin_attribute *,
+			char *, loff_t, size_t);
+	ssize_t (*write)(struct file *,struct kobject *, struct bin_attribute *,
+			 char *, loff_t, size_t);
+	int (*mmap)(struct file *, struct kobject *, struct bin_attribute *attr,
+		    struct vm_area_struct *vma);
+};
+
+/**
+ *	sysfs_bin_attr_init - initialize a dynamically allocated bin_attribute
+ *	@attr: struct bin_attribute to initialize
+ *
+ *	Initialize a dynamically allocated struct bin_attribute so we
+ *	can make lockdep happy.  This is a new requirement for
+ *	attributes and initially this is only needed when lockdep is
+ *	enabled.  Lockdep gives a nice error when your attribute is
+ *	added to sysfs if you don't have this.
+ */
+#define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr)
+
+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;
+
+#ifdef CONFIG_SYSFS
+
+int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
+			    void *data, struct module *owner);
+
+int __must_check sysfs_create_dir(struct kobject *kobj);
+void sysfs_remove_dir(struct kobject *kobj);
+int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name);
+int __must_check sysfs_move_dir(struct kobject *kobj,
+				struct kobject *new_parent_kobj);
+
+int __must_check sysfs_create_file(struct kobject *kobj,
+				   const struct attribute *attr);
+int __must_check sysfs_create_files(struct kobject *kobj,
+				   const struct attribute **attr);
+int __must_check sysfs_chmod_file(struct kobject *kobj,
+				  const struct attribute *attr, mode_t mode);
+void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
+void sysfs_remove_files(struct kobject *kobj, const struct attribute **attr);
+
+int __must_check sysfs_create_bin_file(struct kobject *kobj,
+				       const struct bin_attribute *attr);
+void sysfs_remove_bin_file(struct kobject *kobj,
+			   const struct bin_attribute *attr);
+
+int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target,
+				   const char *name);
+int __must_check sysfs_create_link_nowarn(struct kobject *kobj,
+					  struct kobject *target,
+					  const char *name);
+void sysfs_remove_link(struct kobject *kobj, const char *name);
+
+int sysfs_rename_link(struct kobject *kobj, struct kobject *target,
+			const char *old_name, const char *new_name);
+
+void sysfs_delete_link(struct kobject *dir, struct kobject *targ,
+			const char *name);
+
+int __must_check sysfs_create_group(struct kobject *kobj,
+				    const struct attribute_group *grp);
+int sysfs_update_group(struct kobject *kobj,
+		       const struct attribute_group *grp);
+void sysfs_remove_group(struct kobject *kobj,
+			const struct attribute_group *grp);
+int sysfs_add_file_to_group(struct kobject *kobj,
+			const struct attribute *attr, const char *group);
+void sysfs_remove_file_from_group(struct kobject *kobj,
+			const struct attribute *attr, const char *group);
+int sysfs_merge_group(struct kobject *kobj,
+		       const struct attribute_group *grp);
+void sysfs_unmerge_group(struct kobject *kobj,
+		       const struct attribute_group *grp);
+
+void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
+void sysfs_notify_dirent(struct sysfs_dirent *sd);
+struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
+				      const void *ns,
+				      const unsigned char *name);
+struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd);
+void sysfs_put(struct sysfs_dirent *sd);
+
+int __must_check sysfs_init(void);
+
+#else /* CONFIG_SYSFS */
+
+static inline int sysfs_schedule_callback(struct kobject *kobj,
+		void (*func)(void *), void *data, struct module *owner)
+{
+	return -ENOSYS;
+}
+
+static inline int sysfs_create_dir(struct kobject *kobj)
+{
+	return 0;
+}
+
+static inline void sysfs_remove_dir(struct kobject *kobj)
+{
+}
+
+static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
+{
+	return 0;
+}
+
+static inline int sysfs_move_dir(struct kobject *kobj,
+				 struct kobject *new_parent_kobj)
+{
+	return 0;
+}
+
+static inline int sysfs_create_file(struct kobject *kobj,
+				    const struct attribute *attr)
+{
+	return 0;
+}
+
+static inline int sysfs_create_files(struct kobject *kobj,
+				    const struct attribute **attr)
+{
+	return 0;
+}
+
+static inline int sysfs_chmod_file(struct kobject *kobj,
+				   const struct attribute *attr, mode_t mode)
+{
+	return 0;
+}
+
+static inline void sysfs_remove_file(struct kobject *kobj,
+				     const struct attribute *attr)
+{
+}
+
+static inline void sysfs_remove_files(struct kobject *kobj,
+				     const struct attribute **attr)
+{
+}
+
+static inline int sysfs_create_bin_file(struct kobject *kobj,
+					const struct bin_attribute *attr)
+{
+	return 0;
+}
+
+static inline void sysfs_remove_bin_file(struct kobject *kobj,
+					 const struct bin_attribute *attr)
+{
+}
+
+static inline int sysfs_create_link(struct kobject *kobj,
+				    struct kobject *target, const char *name)
+{
+	return 0;
+}
+
+static inline int sysfs_create_link_nowarn(struct kobject *kobj,
+					   struct kobject *target,
+					   const char *name)
+{
+	return 0;
+}
+
+static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
+{
+}
+
+static inline int sysfs_rename_link(struct kobject *k, struct kobject *t,
+				    const char *old_name, const char *new_name)
+{
+	return 0;
+}
+
+static inline void sysfs_delete_link(struct kobject *k, struct kobject *t,
+				     const char *name)
+{
+}
+
+static inline int sysfs_create_group(struct kobject *kobj,
+				     const struct attribute_group *grp)
+{
+	return 0;
+}
+
+static inline int sysfs_update_group(struct kobject *kobj,
+				const struct attribute_group *grp)
+{
+	return 0;
+}
+
+static inline void sysfs_remove_group(struct kobject *kobj,
+				      const struct attribute_group *grp)
+{
+}
+
+static inline int sysfs_add_file_to_group(struct kobject *kobj,
+		const struct attribute *attr, const char *group)
+{
+	return 0;
+}
+
+static inline void sysfs_remove_file_from_group(struct kobject *kobj,
+		const struct attribute *attr, const char *group)
+{
+}
+
+static inline int sysfs_merge_group(struct kobject *kobj,
+		       const struct attribute_group *grp)
+{
+	return 0;
+}
+
+static inline void sysfs_unmerge_group(struct kobject *kobj,
+		       const struct attribute_group *grp)
+{
+}
+
+static inline void sysfs_notify(struct kobject *kobj, const char *dir,
+				const char *attr)
+{
+}
+static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
+{
+}
+static inline
+struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
+				      const void *ns,
+				      const unsigned char *name)
+{
+	return NULL;
+}
+static inline struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd)
+{
+	return NULL;
+}
+static inline void sysfs_put(struct sysfs_dirent *sd)
+{
+}
+
+static inline int __must_check sysfs_init(void)
+{
+	return 0;
+}
+
+#endif /* CONFIG_SYSFS */
+
+#endif /* _SYSFS_H_ */