1 files changed, 227 insertions, 0 deletions
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
new file mode 100644
index 000000000..592f9785b
--- /dev/null
+++ b/include/linux/kobject.h
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * kobject.h - generic kernel object infrastructure.
+ *
+ * Copyright (c) 2002-2003 Patrick Mochel
+ * Copyright (c) 2002-2003 Open Source Development Labs
+ * Copyright (c) 2006-2008 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (c) 2006-2008 Novell Inc.
+ *
+ * Please read Documentation/core-api/kobject.rst before using the kobject
+ * interface, ESPECIALLY the parts about reference counts and object
+ * destructors.
+ */
+
+#ifndef _KOBJECT_H_
+#define _KOBJECT_H_
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/sysfs.h>
+#include <linux/compiler.h>
+#include <linux/container_of.h>
+#include <linux/spinlock.h>
+#include <linux/kref.h>
+#include <linux/kobject_ns.h>
+#include <linux/wait.h>
+#include <linux/atomic.h>
+#include <linux/workqueue.h>
+#include <linux/uidgid.h>
+
+#define UEVENT_HELPER_PATH_LEN		256
+#define UEVENT_NUM_ENVP			64	/* number of env pointers */
+#define UEVENT_BUFFER_SIZE		2048	/* buffer for the variables */
+
+#ifdef CONFIG_UEVENT_HELPER
+/* path to the userspace helper executed on an event */
+extern char uevent_helper[];
+#endif
+
+/* counter to tag the uevent, read only except for the kobject core */
+extern u64 uevent_seqnum;
+
+/*
+ * The actions here must match the index to the string array
+ * in lib/kobject_uevent.c
+ *
+ * Do not add new actions here without checking with the driver-core
+ * maintainers. Action strings are not meant to express subsystem
+ * or device specific properties. In most cases you want to send a
+ * kobject_uevent_env(kobj, KOBJ_CHANGE, env) with additional event
+ * specific variables added to the event environment.
+ */
+enum kobject_action {
+	KOBJ_ADD,
+	KOBJ_REMOVE,
+	KOBJ_CHANGE,
+	KOBJ_MOVE,
+	KOBJ_ONLINE,
+	KOBJ_OFFLINE,
+	KOBJ_BIND,
+	KOBJ_UNBIND,
+};
+
+struct kobject {
+	const char		*name;
+	struct list_head	entry;
+	struct kobject		*parent;
+	struct kset		*kset;
+	const struct kobj_type	*ktype;
+	struct kernfs_node	*sd; /* sysfs directory entry */
+	struct kref		kref;
+#ifdef CONFIG_DEBUG_KOBJECT_RELEASE
+	struct delayed_work	release;
+#endif
+	unsigned int state_initialized:1;
+	unsigned int state_in_sysfs:1;
+	unsigned int state_add_uevent_sent:1;
+	unsigned int state_remove_uevent_sent:1;
+	unsigned int uevent_suppress:1;
+};
+
+extern __printf(2, 3)
+int kobject_set_name(struct kobject *kobj, const char *name, ...);
+extern __printf(2, 0)
+int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
+			   va_list vargs);
+
+static inline const char *kobject_name(const struct kobject *kobj)
+{
+	return kobj->name;
+}
+
+extern void kobject_init(struct kobject *kobj, const struct kobj_type *ktype);
+extern __printf(3, 4) __must_check
+int kobject_add(struct kobject *kobj, struct kobject *parent,
+		const char *fmt, ...);
+extern __printf(4, 5) __must_check
+int kobject_init_and_add(struct kobject *kobj,
+			 const struct kobj_type *ktype, struct kobject *parent,
+			 const char *fmt, ...);
+
+extern void kobject_del(struct kobject *kobj);
+
+extern struct kobject * __must_check kobject_create_and_add(const char *name,
+						struct kobject *parent);
+
+extern int __must_check kobject_rename(struct kobject *, const char *new_name);
+extern int __must_check kobject_move(struct kobject *, struct kobject *);
+
+extern struct kobject *kobject_get(struct kobject *kobj);
+extern struct kobject * __must_check kobject_get_unless_zero(
+						struct kobject *kobj);
+extern void kobject_put(struct kobject *kobj);
+
+extern const void *kobject_namespace(struct kobject *kobj);
+extern void kobject_get_ownership(struct kobject *kobj,
+				  kuid_t *uid, kgid_t *gid);
+extern char *kobject_get_path(const struct kobject *kobj, gfp_t flag);
+
+struct kobj_type {
+	void (*release)(struct kobject *kobj);
+	const struct sysfs_ops *sysfs_ops;
+	const struct attribute_group **default_groups;
+	const struct kobj_ns_type_operations *(*child_ns_type)(struct kobject *kobj);
+	const void *(*namespace)(struct kobject *kobj);
+	void (*get_ownership)(struct kobject *kobj, kuid_t *uid, kgid_t *gid);
+};
+
+struct kobj_uevent_env {
+	char *argv[3];
+	char *envp[UEVENT_NUM_ENVP];
+	int envp_idx;
+	char buf[UEVENT_BUFFER_SIZE];
+	int buflen;
+};
+
+struct kset_uevent_ops {
+	int (* const filter)(struct kobject *kobj);
+	const char *(* const name)(struct kobject *kobj);
+	int (* const uevent)(struct kobject *kobj, struct kobj_uevent_env *env);
+};
+
+struct kobj_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr,
+			char *buf);
+	ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr,
+			 const char *buf, size_t count);
+};
+
+extern const struct sysfs_ops kobj_sysfs_ops;
+
+struct sock;
+
+/**
+ * struct kset - a set of kobjects of a specific type, belonging to a specific subsystem.
+ *
+ * A kset defines a group of kobjects.  They can be individually
+ * different "types" but overall these kobjects all want to be grouped
+ * together and operated on in the same manner.  ksets are used to
+ * define the attribute callbacks and other common events that happen to
+ * a kobject.
+ *
+ * @list: the list of all kobjects for this kset
+ * @list_lock: a lock for iterating over the kobjects
+ * @kobj: the embedded kobject for this kset (recursion, isn't it fun...)
+ * @uevent_ops: the set of uevent operations for this kset.  These are
+ * called whenever a kobject has something happen to it so that the kset
+ * can add new environment variables, or filter out the uevents if so
+ * desired.
+ */
+struct kset {
+	struct list_head list;
+	spinlock_t list_lock;
+	struct kobject kobj;
+	const struct kset_uevent_ops *uevent_ops;
+} __randomize_layout;
+
+extern void kset_init(struct kset *kset);
+extern int __must_check kset_register(struct kset *kset);
+extern void kset_unregister(struct kset *kset);
+extern struct kset * __must_check kset_create_and_add(const char *name,
+						const struct kset_uevent_ops *u,
+						struct kobject *parent_kobj);
+
+static inline struct kset *to_kset(struct kobject *kobj)
+{
+	return kobj ? container_of(kobj, struct kset, kobj) : NULL;
+}
+
+static inline struct kset *kset_get(struct kset *k)
+{
+	return k ? to_kset(kobject_get(&k->kobj)) : NULL;
+}
+
+static inline void kset_put(struct kset *k)
+{
+	kobject_put(&k->kobj);
+}
+
+static inline const struct kobj_type *get_ktype(struct kobject *kobj)
+{
+	return kobj->ktype;
+}
+
+extern struct kobject *kset_find_obj(struct kset *, const char *);
+
+/* The global /sys/kernel/ kobject for people to chain off of */
+extern struct kobject *kernel_kobj;
+/* The global /sys/kernel/mm/ kobject for people to chain off of */
+extern struct kobject *mm_kobj;
+/* The global /sys/hypervisor/ kobject for people to chain off of */
+extern struct kobject *hypervisor_kobj;
+/* The global /sys/power/ kobject for people to chain off of */
+extern struct kobject *power_kobj;
+/* The global /sys/firmware/ kobject for people to chain off of */
+extern struct kobject *firmware_kobj;
+
+int kobject_uevent(struct kobject *kobj, enum kobject_action action);
+int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
+			char *envp[]);
+int kobject_synth_uevent(struct kobject *kobj, const char *buf, size_t count);
+
+__printf(2, 3)
+int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...);
+
+#endif /* _KOBJECT_H_ */