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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
144 lines
3.1 KiB
C
144 lines
3.1 KiB
C
/*
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* kobject.h - generic kernel object infrastructure.
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*
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* Copyright (c) 2002-2003 Patrick Mochel
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* Copyright (c) 2002-2003 Open Source Development Labs
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* Copyright (c) 2006-2008 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (c) 2006-2008 Novell Inc.
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*
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* This file is released under the GPLv2.
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*
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* Please read Documentation/kobject.txt before using the kobject
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* interface, ESPECIALLY the parts about reference counts and object
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* destructors.
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*/
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#ifndef _KOBJECT_H_
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#define _KOBJECT_H_
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#include <linux/atomic.h>
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#include <linux/bug.h>
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#include <linux/compiler.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/sysfs.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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struct kset;
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struct kobj_type {
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void (*release)(struct kobject *kobj);
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const struct sysfs_ops *sysfs_ops;
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const struct attribute_group **default_groups;
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const struct kobj_ns_type_operations *(*child_ns_type)(struct kobject *kobj);
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const void *(*namespace)(struct kobject *kobj);
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};
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struct kobj_uevent_env {
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};
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struct kobj_attribute {
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struct attribute attr;
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ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr,
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char *buf);
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ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr,
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const char *buf, size_t count);
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};
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struct kobject {
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struct kobject *parent;
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struct kset *kset;
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const struct kobj_type *ktype;
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struct kernfs_node *sd; /* sysfs directory entry */
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atomic_t ref;
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unsigned int state_initialized:1;
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unsigned int state_in_sysfs:1;
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unsigned int state_add_uevent_sent:1;
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unsigned int state_remove_uevent_sent:1;
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unsigned int uevent_suppress:1;
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};
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struct kset {
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struct kobject kobj;
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};
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#define kobject_add(...) 0
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static inline void kobject_init(struct kobject *kobj, const struct kobj_type *ktype)
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{
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memset(kobj, 0, sizeof(*kobj));
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atomic_set(&kobj->ref, 1);
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kobj->ktype = ktype;
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kobj->state_initialized = 1;
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}
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static inline void kobject_del(struct kobject *kobj);
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static inline void kobject_cleanup(struct kobject *kobj)
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{
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const struct kobj_type *t = kobj->ktype;
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/* remove from sysfs if the caller did not do it */
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if (kobj->state_in_sysfs)
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kobject_del(kobj);
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if (t && t->release)
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t->release(kobj);
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}
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static inline void kobject_put(struct kobject *kobj)
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{
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BUG_ON(!kobj);
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BUG_ON(!kobj->state_initialized);
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if (atomic_dec_and_test(&kobj->ref))
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kobject_cleanup(kobj);
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}
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static inline void kobject_del(struct kobject *kobj)
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{
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if (!kobj)
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return;
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kobj->state_in_sysfs = 0;
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#if 0
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kobj_kset_leave(kobj);
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#endif
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kobject_put(kobj->parent);
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kobj->parent = NULL;
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}
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static inline struct kobject *kobject_get(struct kobject *kobj)
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{
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BUG_ON(!kobj);
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BUG_ON(!kobj->state_initialized);
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atomic_inc(&kobj->ref);
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return kobj;
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}
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static inline void kset_unregister(struct kset *kset)
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{
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kfree(kset);
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}
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#define kset_create_and_add(_name, _u, _parent) \
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((struct kset *) kzalloc(sizeof(struct kset), GFP_KERNEL))
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enum kobject_action {
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KOBJ_ADD,
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KOBJ_REMOVE,
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KOBJ_CHANGE,
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KOBJ_MOVE,
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KOBJ_ONLINE,
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KOBJ_OFFLINE,
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KOBJ_BIND,
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KOBJ_UNBIND,
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};
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static inline void kobject_uevent_env(struct kobject *kobj, int flags, char **envp) {}
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#endif /* _KOBJECT_H_ */
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