Release 4.12 include/linux/kobject.h
/*
* 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
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick Mochel | 17 | 85.00% | 1 | 33.33% |
| Dmitry Torokhov | 2 | 10.00% | 1 | 33.33% |
| Kay Sievers | 1 | 5.00% | 1 | 33.33% |
| Total | 20 | 100.00% | 3 | 100.00% |
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 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick Mochel | 29 | 100.00% | 2 | 100.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
static inline struct kset *kset_get(struct kset *k)
{
return k ? to_kset(kobject_get(&k->kobj)) : NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick Mochel | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
static inline void kset_put(struct kset *k)
{
kobject_put(&k->kobj);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick Mochel | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
static inline struct kobj_type *get_ktype(struct kobject *kobj)
{
return kobj->ktype;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 19 | 100.00% | 2 | 100.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
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
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick Mochel | 267 | 28.22% | 12 | 14.81% |
| Greg Kroah-Hartman | 221 | 23.36% | 25 | 30.86% |
| Kay Sievers | 197 | 20.82% | 10 | 12.35% |
| Emese Revfy | 44 | 4.65% | 2 | 2.47% |
| Eric W. Biedermann | 36 | 3.81% | 2 | 2.47% |
| Cornelia Huck | 30 | 3.17% | 1 | 1.23% |
| Joe Perches | 24 | 2.54% | 1 | 1.23% |
| Tejun Heo | 14 | 1.48% | 3 | 3.70% |
| Jan Kara | 13 | 1.37% | 1 | 1.23% |
| Russell King | 12 | 1.27% | 1 | 1.23% |
| Roland Dreier | 11 | 1.16% | 1 | 1.23% |
| Robert Love | 10 | 1.06% | 1 | 1.23% |
| Vladimir Davydov | 7 | 0.74% | 1 | 1.23% |
| Nishanth Aravamudan | 7 | 0.74% | 1 | 1.23% |
| Dmitry Torokhov | 6 | 0.63% | 3 | 3.70% |
| Andrew Morton | 6 | 0.63% | 1 | 1.23% |
| Lei Ming | 6 | 0.63% | 1 | 1.23% |
| Michael Marineau | 5 | 0.53% | 1 | 1.23% |
| Richard Kennedy | 4 | 0.42% | 1 | 1.23% |
| Nicolas Iooss | 4 | 0.42% | 1 | 1.23% |
| Manish Lachwani | 3 | 0.32% | 1 | 1.23% |
| David Howells | 3 | 0.32% | 1 | 1.23% |
| Michael Holzheu | 3 | 0.32% | 1 | 1.23% |
| Neil Brown | 3 | 0.32% | 1 | 1.23% |
| Robin Holt | 2 | 0.21% | 1 | 1.23% |
| Linus Torvalds | 2 | 0.21% | 1 | 1.23% |
| Aneesh Kumar K.V | 2 | 0.21% | 1 | 1.23% |
| Maneesh Soni | 1 | 0.11% | 1 | 1.23% |
| Al Viro | 1 | 0.11% | 1 | 1.23% |
| Arun Sharma | 1 | 0.11% | 1 | 1.23% |
| Ulf Magnusson | 1 | 0.11% | 1 | 1.23% |
| Total | 946 | 100.00% | 81 | 100.00% |
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