--- /dev/null
+/*
+ * 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/kernfs.h>
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/lockdep.h>
+#include <linux/kobject_ns.h>
+#include <linux/stat.h>
+#include <linux/atomic.h>
+
+struct kobject;
+struct module;
+struct bin_attribute;
+enum kobj_ns_type;
+
+struct attribute {
+ const char *name;
+ umode_t mode;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ bool ignore_lockdep:1;
+ 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 - data structure used to declare an attribute group.
+ * @name: Optional: Attribute group name
+ * If specified, the attribute group will be created in
+ * a new subdirectory with this name.
+ * @is_visible: Optional: Function to return permissions associated with an
+ * attribute of the group. Will be called repeatedly for each
+ * attribute in the group. Only read/write permissions as well as
+ * SYSFS_PREALLOC are accepted. Must return 0 if an attribute is
+ * not visible. The returned value will replace static permissions
+ * defined in struct attribute or struct bin_attribute.
+ * @attrs: Pointer to NULL terminated list of attributes.
+ * @bin_attrs: Pointer to NULL terminated list of binary attributes.
+ * Either attrs or bin_attrs or both must be provided.
+ */
+struct attribute_group {
+ const char *name;
+ umode_t (*is_visible)(struct kobject *,
+ struct attribute *, int);
+ struct attribute **attrs;
+ struct bin_attribute **bin_attrs;
+};
+
+/**
+ * Use these macros to make defining attributes easier. See include/linux/device.h
+ * for examples..
+ */
+
+#define SYSFS_PREALLOC 010000
+
+#define __ATTR(_name, _mode, _show, _store) { \
+ .attr = {.name = __stringify(_name), \
+ .mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \
+ .show = _show, \
+ .store = _store, \
+}
+
+#define __ATTR_PREALLOC(_name, _mode, _show, _store) { \
+ .attr = {.name = __stringify(_name), \
+ .mode = SYSFS_PREALLOC | VERIFY_OCTAL_PERMISSIONS(_mode) },\
+ .show = _show, \
+ .store = _store, \
+}
+
+#define __ATTR_RO(_name) { \
+ .attr = { .name = __stringify(_name), .mode = S_IRUGO }, \
+ .show = _name##_show, \
+}
+
+#define __ATTR_WO(_name) { \
+ .attr = { .name = __stringify(_name), .mode = S_IWUSR }, \
+ .store = _name##_store, \
+}
+
+#define __ATTR_RW(_name) __ATTR(_name, (S_IWUSR | S_IRUGO), \
+ _name##_show, _name##_store)
+
+#define __ATTR_NULL { .attr = { .name = NULL } }
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+#define __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) { \
+ .attr = {.name = __stringify(_name), .mode = _mode, \
+ .ignore_lockdep = true }, \
+ .show = _show, \
+ .store = _store, \
+}
+#else
+#define __ATTR_IGNORE_LOCKDEP __ATTR
+#endif
+
+#define __ATTRIBUTE_GROUPS(_name) \
+static const struct attribute_group *_name##_groups[] = { \
+ &_name##_group, \
+ NULL, \
+}
+
+#define ATTRIBUTE_GROUPS(_name) \
+static const struct attribute_group _name##_group = { \
+ .attrs = _name##_attrs, \
+}; \
+__ATTRIBUTE_GROUPS(_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)
+
+/* macros to create static binary attributes easier */
+#define __BIN_ATTR(_name, _mode, _read, _write, _size) { \
+ .attr = { .name = __stringify(_name), .mode = _mode }, \
+ .read = _read, \
+ .write = _write, \
+ .size = _size, \
+}
+
+#define __BIN_ATTR_RO(_name, _size) { \
+ .attr = { .name = __stringify(_name), .mode = S_IRUGO }, \
+ .read = _name##_read, \
+ .size = _size, \
+}
+
+#define __BIN_ATTR_RW(_name, _size) __BIN_ATTR(_name, \
+ (S_IWUSR | S_IRUGO), _name##_read, \
+ _name##_write, _size)
+
+#define __BIN_ATTR_NULL __ATTR_NULL
+
+#define BIN_ATTR(_name, _mode, _read, _write, _size) \
+struct bin_attribute bin_attr_##_name = __BIN_ATTR(_name, _mode, _read, \
+ _write, _size)
+
+#define BIN_ATTR_RO(_name, _size) \
+struct bin_attribute bin_attr_##_name = __BIN_ATTR_RO(_name, _size)
+
+#define BIN_ATTR_RW(_name, _size) \
+struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size)
+
+struct sysfs_ops {
+ ssize_t (*show)(struct kobject *, struct attribute *, char *);
+ ssize_t (*store)(struct kobject *, struct attribute *, const char *, size_t);
+};
+
+#ifdef CONFIG_SYSFS
+
+int __must_check sysfs_create_dir_ns(struct kobject *kobj, const void *ns);
+void sysfs_remove_dir(struct kobject *kobj);
+int __must_check sysfs_rename_dir_ns(struct kobject *kobj, const char *new_name,
+ const void *new_ns);
+int __must_check sysfs_move_dir_ns(struct kobject *kobj,
+ struct kobject *new_parent_kobj,
+ const void *new_ns);
+int __must_check sysfs_create_mount_point(struct kobject *parent_kobj,
+ const char *name);
+void sysfs_remove_mount_point(struct kobject *parent_kobj,
+ const char *name);
+
+int __must_check sysfs_create_file_ns(struct kobject *kobj,
+ const struct attribute *attr,
+ const void *ns);
+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, umode_t mode);
+void sysfs_remove_file_ns(struct kobject *kobj, const struct attribute *attr,
+ const void *ns);
+bool sysfs_remove_file_self(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_ns(struct kobject *kobj, struct kobject *target,
+ const char *old_name, const char *new_name,
+ const void *new_ns);
+
+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 __must_check sysfs_create_groups(struct kobject *kobj,
+ const struct attribute_group **groups);
+int sysfs_update_group(struct kobject *kobj,
+ const struct attribute_group *grp);
+void sysfs_remove_group(struct kobject *kobj,
+ const struct attribute_group *grp);
+void sysfs_remove_groups(struct kobject *kobj,
+ const struct attribute_group **groups);
+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);
+int sysfs_add_link_to_group(struct kobject *kobj, const char *group_name,
+ struct kobject *target, const char *link_name);
+void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name,
+ const char *link_name);
+
+void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
+
+int __must_check sysfs_init(void);
+
+static inline void sysfs_enable_ns(struct kernfs_node *kn)
+{
+ return kernfs_enable_ns(kn);
+}
+
+#else /* CONFIG_SYSFS */
+
+static inline int sysfs_create_dir_ns(struct kobject *kobj, const void *ns)
+{
+ return 0;
+}
+
+static inline void sysfs_remove_dir(struct kobject *kobj)
+{
+}
+
+static inline int sysfs_rename_dir_ns(struct kobject *kobj,
+ const char *new_name, const void *new_ns)
+{
+ return 0;
+}
+
+static inline int sysfs_move_dir_ns(struct kobject *kobj,
+ struct kobject *new_parent_kobj,
+ const void *new_ns)
+{
+ return 0;
+}
+
+static inline int sysfs_create_mount_point(struct kobject *parent_kobj,
+ const char *name)
+{
+ return 0;
+}
+
+static inline void sysfs_remove_mount_point(struct kobject *parent_kobj,
+ const char *name)
+{
+}
+
+static inline int sysfs_create_file_ns(struct kobject *kobj,
+ const struct attribute *attr,
+ const void *ns)
+{
+ 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, umode_t mode)
+{
+ return 0;
+}
+
+static inline void sysfs_remove_file_ns(struct kobject *kobj,
+ const struct attribute *attr,
+ const void *ns)
+{
+}
+
+static inline bool sysfs_remove_file_self(struct kobject *kobj,
+ const struct attribute *attr)
+{
+ return false;
+}
+
+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_ns(struct kobject *k, struct kobject *t,
+ const char *old_name,
+ const char *new_name, const void *ns)
+{
+ 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_create_groups(struct kobject *kobj,
+ const struct attribute_group **groups)
+{
+ 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 void sysfs_remove_groups(struct kobject *kobj,
+ const struct attribute_group **groups)
+{
+}
+
+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 int sysfs_add_link_to_group(struct kobject *kobj,
+ const char *group_name, struct kobject *target,
+ const char *link_name)
+{
+ return 0;
+}
+
+static inline void sysfs_remove_link_from_group(struct kobject *kobj,
+ const char *group_name, const char *link_name)
+{
+}
+
+static inline void sysfs_notify(struct kobject *kobj, const char *dir,
+ const char *attr)
+{
+}
+
+static inline int __must_check sysfs_init(void)
+{
+ return 0;
+}
+
+static inline void sysfs_enable_ns(struct kernfs_node *kn)
+{
+}
+
+#endif /* CONFIG_SYSFS */
+
+static inline int __must_check sysfs_create_file(struct kobject *kobj,
+ const struct attribute *attr)
+{
+ return sysfs_create_file_ns(kobj, attr, NULL);
+}
+
+static inline void sysfs_remove_file(struct kobject *kobj,
+ const struct attribute *attr)
+{
+ sysfs_remove_file_ns(kobj, attr, NULL);
+}
+
+static inline int sysfs_rename_link(struct kobject *kobj, struct kobject *target,
+ const char *old_name, const char *new_name)
+{
+ return sysfs_rename_link_ns(kobj, target, old_name, new_name, NULL);
+}
+
+static inline void sysfs_notify_dirent(struct kernfs_node *kn)
+{
+ kernfs_notify(kn);
+}
+
+static inline struct kernfs_node *sysfs_get_dirent(struct kernfs_node *parent,
+ const unsigned char *name)
+{
+ return kernfs_find_and_get(parent, name);
+}
+
+static inline struct kernfs_node *sysfs_get(struct kernfs_node *kn)
+{
+ kernfs_get(kn);
+ return kn;
+}
+
+static inline void sysfs_put(struct kernfs_node *kn)
+{
+ kernfs_put(kn);
+}
+
+#endif /* _SYSFS_H_ */
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