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/* |
* 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. |
* |
* This file is released under the GPLv2. |
* |
* Please read Documentation/kobject.txt before using the kobject |
* interface, ESPECIALLY the parts about reference counts and object |
* destructors. |
*/ |
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#ifndef _KOBJECT_H_ |
#define _KOBJECT_H_ |
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#include <linux/types.h> |
#include <linux/list.h> |
//#include <linux/sysfs.h> |
#include <linux/compiler.h> |
#include <linux/spinlock.h> |
#include <linux/kref.h> |
//#include <linux/kobject_ns.h> |
#include <linux/kernel.h> |
#include <linux/wait.h> |
//#include <linux/atomic.h> |
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#define UEVENT_HELPER_PATH_LEN 256 |
#define UEVENT_NUM_ENVP 32 /* number of env pointers */ |
#define UEVENT_BUFFER_SIZE 2048 /* buffer for the variables */ |
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/* path to the userspace helper executed on an event */ |
extern char uevent_helper[]; |
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/* counter to tag the uevent, read only except for the kobject core */ |
extern u64 uevent_seqnum; |
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/* |
* 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_MAX |
}; |
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struct kobject { |
const char *name; |
struct list_head entry; |
struct kobject *parent; |
// struct kset *kset; |
struct kobj_type *ktype; |
// struct sysfs_dirent *sd; |
struct kref kref; |
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; |
}; |
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extern __printf(2, 3) |
int kobject_set_name(struct kobject *kobj, const char *name, ...); |
extern int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, |
va_list vargs); |
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static inline const char *kobject_name(const struct kobject *kobj) |
{ |
return kobj->name; |
} |
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extern void kobject_init(struct kobject *kobj, 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, |
struct kobj_type *ktype, struct kobject *parent, |
const char *fmt, ...); |
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extern void kobject_del(struct kobject *kobj); |
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extern struct kobject * __must_check kobject_create(void); |
extern struct kobject * __must_check kobject_create_and_add(const char *name, |
struct kobject *parent); |
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extern int __must_check kobject_rename(struct kobject *, const char *new_name); |
extern int __must_check kobject_move(struct kobject *, struct kobject *); |
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extern struct kobject *kobject_get(struct kobject *kobj); |
extern void kobject_put(struct kobject *kobj); |
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extern char *kobject_get_path(struct kobject *kobj, gfp_t flag); |
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struct kobj_type { |
void (*release)(struct kobject *kobj); |
// const struct sysfs_ops *sysfs_ops; |
// struct attribute **default_attrs; |
// const struct kobj_ns_type_operations *(*child_ns_type)(struct kobject *kobj); |
// const void *(*namespace)(struct kobject *kobj); |
}; |
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struct kobj_uevent_env { |
char *envp[UEVENT_NUM_ENVP]; |
int envp_idx; |
char buf[UEVENT_BUFFER_SIZE]; |
int buflen; |
}; |
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//struct kset_uevent_ops { |
// int (* const filter)(struct kset *kset, struct kobject *kobj); |
// const char *(* const name)(struct kset *kset, struct kobject *kobj); |
// int (* const uevent)(struct kset *kset, struct kobject *kobj, |
// struct kobj_uevent_env *env); |
//}; |
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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); |
}; |
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extern const struct sysfs_ops kobj_sysfs_ops; |
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struct sock; |
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/** |
* 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; |
}; |
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//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); |
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//static inline struct kset *to_kset(struct kobject *kobj) |
//{ |
// return kobj ? container_of(kobj, struct kset, kobj) : NULL; |
//} |
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//static inline struct kset *kset_get(struct kset *k) |
//{ |
// return k ? to_kset(kobject_get(&k->kobj)) : NULL; |
//} |
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//static inline void kset_put(struct kset *k) |
//{ |
// kobject_put(&k->kobj); |
//} |
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static inline struct kobj_type *get_ktype(struct kobject *kobj) |
{ |
return kobj->ktype; |
} |
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//extern struct kobject *kset_find_obj(struct kset *, const char *); |
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/* 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; |
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int kobject_uevent(struct kobject *kobj, enum kobject_action action); |
int kobject_uevent_env(struct kobject *kobj, enum kobject_action action, |
char *envp[]); |
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__printf(2, 3) |
int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...); |
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int kobject_action_type(const char *buf, size_t count, |
enum kobject_action *type); |
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#endif /* _KOBJECT_H_ */ |