cregit-Linux how code gets into the kernel

Release 4.7 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 <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.
 */

#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_HELPER_PATH_LEN		256

#define UEVENT_NUM_ENVP			32	
/* 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_MAX
};


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;
#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;
}


Contributors
PersonTokensPropCommitsCommitProp
patrick mochelpatrick mochel1785.00%133.33%


dmitry torokhovdmitry torokhov210.00%133.33%


kay sieverskay sievers15.00%133.33%


Total20100.00%3100.00%



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 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;
}


Contributors
PersonTokensPropCommitsCommitProp
patrick mochelpatrick mochel29100.00%2100.00%


Total29100.00%2100.00%






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


Contributors
PersonTokensPropCommitsCommitProp
patrick mochelpatrick mochel30100.00%1100.00%


Total30100.00%1100.00%






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


Contributors
PersonTokensPropCommitsCommitProp
patrick mochelpatrick mochel20100.00%1100.00%


Total20100.00%1100.00%






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


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman19100.00%2100.00%


Total19100.00%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
PersonTokensPropCommitsCommitProp
patrick mochelpatrick mochel27028.94%1215.19%


greg kroah-hartmangreg kroah-hartman21623.15%2531.65%


kay sieverskay sievers19721.11%1012.66%


emese revfyemese revfy444.72%22.53%


eric w. biedermaneric w. biederman414.39%22.53%


cornelia huckcornelia huck303.22%11.27%


joe perchesjoe perches242.57%11.27%


tejun heotejun heo141.50%33.80%


russell kingrussell king121.29%11.27%


roland dreierroland dreier111.18%11.27%


robert loverobert love101.07%11.27%


vladimir davydovvladimir davydov70.75%11.27%


nishanth aravamudannishanth aravamudan70.75%11.27%


andrew mortonandrew morton60.64%11.27%


lei minglei ming60.64%11.27%


michael marineaumichael marineau50.54%11.27%


dmitry torokhovdmitry torokhov50.54%33.80%


richard kennedyrichard kennedy40.43%11.27%


nicolas ioossnicolas iooss40.43%11.27%


david howellsdavid howells30.32%11.27%


michael holzheumichael holzheu30.32%11.27%


neil brownneil brown30.32%11.27%


manish lachwanimanish lachwani30.32%11.27%


linus torvaldslinus torvalds20.21%11.27%


aneesh kumaraneesh kumar20.21%11.27%


al viroal viro10.11%11.27%


maneesh sonimaneesh soni10.11%11.27%


arun sharmaarun sharma10.11%11.27%


ulf magnussonulf magnusson10.11%11.27%


Total933100.00%79100.00%

  
Directory: include/linux



Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
{% endraw %}