cregit-Linux how code gets into the kernel

Release 4.12 include/linux/kobject.h

Directory: include/linux
 * 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 <>
 * 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.

#ifndef _KOBJECT_H_

#define _KOBJECT_H_

#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>
#include <linux/workqueue.h>


#define UEVENT_NUM_ENVP			32	
/* number of env pointers */

#define UEVENT_BUFFER_SIZE		2048	
/* buffer for the variables */

/* path to the userspace helper executed on an event */
extern char uevent_helper[];

/* 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 {

struct kobject {
const char		*name;
struct list_head	entry;
struct kobject		*parent;
struct kset		*kset;
struct kobj_type	*ktype;
struct kernfs_node	*sd; /* sysfs directory entry */
struct kref		kref;
struct delayed_work	release;
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; }


Patrick Mochel1785.00%133.33%
Dmitry Torokhov210.00%133.33%
Kay Sievers15.00%133.33%

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, ...); extern void kobject_del(struct kobject *kobj); extern struct kobject * __must_check kobject_create(void); 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 char *kobject_get_path(struct kobject *kobj, gfp_t flag); 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); }; 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 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); }; 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; }; 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; }


Patrick Mochel29100.00%2100.00%

static inline struct kset *kset_get(struct kset *k) { return k ? to_kset(kobject_get(&k->kobj)) : NULL; }


Patrick Mochel30100.00%1100.00%

static inline void kset_put(struct kset *k) { kobject_put(&k->kobj); }


Patrick Mochel20100.00%1100.00%

static inline struct kobj_type *get_ktype(struct kobject *kobj) { return kobj->ktype; }


Greg Kroah-Hartman19100.00%2100.00%

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[]); __printf(2, 3) int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...); int kobject_action_type(const char *buf, size_t count, enum kobject_action *type); #endif /* _KOBJECT_H_ */

Overall Contributors

Patrick Mochel26728.22%1214.81%
Greg Kroah-Hartman22123.36%2530.86%
Kay Sievers19720.82%1012.35%
Emese Revfy444.65%22.47%
Eric W. Biedermann363.81%22.47%
Cornelia Huck303.17%11.23%
Joe Perches242.54%11.23%
Tejun Heo141.48%33.70%
Jan Kara131.37%11.23%
Russell King121.27%11.23%
Roland Dreier111.16%11.23%
Robert Love101.06%11.23%
Vladimir Davydov70.74%11.23%
Nishanth Aravamudan70.74%11.23%
Dmitry Torokhov60.63%33.70%
Andrew Morton60.63%11.23%
Lei Ming60.63%11.23%
Michael Marineau50.53%11.23%
Richard Kennedy40.42%11.23%
Nicolas Iooss40.42%11.23%
Manish Lachwani30.32%11.23%
David Howells30.32%11.23%
Michael Holzheu30.32%11.23%
Neil Brown30.32%11.23%
Robin Holt20.21%11.23%
Linus Torvalds20.21%11.23%
Aneesh Kumar K.V20.21%11.23%
Maneesh Soni10.11%11.23%
Al Viro10.11%11.23%
Arun Sharma10.11%11.23%
Ulf Magnusson10.11%11.23%
Directory: include/linux
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