http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/kobject.h

/* * kobject.h - generic kernel object infrastructure. * * Copyright (c) 2002-2003 Patrick Mochel * Copyright (c) 2002-2003 Open Source Development Labs * * 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_ #ifdef __KERNEL__ #include <linux/types.h> #include <linux/list.h> #include <linux/sysfs.h> #include <linux/spinlock.h> #include <linux/rwsem.h> #include <linux/kref.h> #include <linux/kernel.h> #include <asm/atomic.h> #define KOBJ_NAME_LEN 20 #define UEVENT_HELPER_PATH_LEN 256 /* 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 proper string in lib/kobject_uevent.c */ typedef int __bitwise kobject_action_t; enum kobject_action { KOBJ_ADD = (__force kobject_action_t) 0x01, /* exclusive to core */ KOBJ_REMOVE = (__force kobject_action_t) 0x02, /* exclusive to core */ KOBJ_CHANGE = (__force kobject_action_t) 0x03, /* device state change */ KOBJ_MOUNT = (__force kobject_action_t) 0x04, /* mount event for block devices (broken) */ KOBJ_UMOUNT = (__force kobject_action_t) 0x05, /* umount event for block devices (broken) */ KOBJ_OFFLINE = (__force kobject_action_t) 0x06, /* device offline */ KOBJ_ONLINE = (__force kobject_action_t) 0x07, /* device online */ }; struct kobject { const char * k_name; char name[KOBJ_NAME_LEN]; struct kref kref; struct list_head entry; struct kobject * parent; struct kset * kset; struct kobj_type * ktype; struct dentry * dentry; }; extern int kobject_set_name(struct kobject *, const char *, ...) __attribute__((format(printf,2,3))); static inline const char * kobject_name(const struct kobject * kobj) { return kobj->k_name; } extern void kobject_init(struct kobject *); extern void kobject_cleanup(struct kobject *); extern int kobject_add(struct kobject *); extern void kobject_del(struct kobject *); extern int kobject_rename(struct kobject *, const char *new_name); extern int kobject_register(struct kobject *); extern void kobject_unregister(struct kobject *); extern struct kobject * kobject_get(struct kobject *); extern void kobject_put(struct kobject *); extern char * kobject_get_path(struct kobject *, gfp_t); struct kobj_type { void (*release)(struct kobject *); struct sysfs_ops * sysfs_ops; struct attribute ** default_attrs; }; /** * kset - a set of kobjects of a specific type, belonging * to a specific subsystem. * * All kobjects of a kset should be embedded in an identical * type. This type may have a descriptor, which the kset points * to. This allows there to exist sets of objects of the same * type in different subsystems. * * A subsystem does not have to be a list of only one type * of object; multiple ksets can belong to one subsystem. All * ksets of a subsystem share the subsystem's lock. * * Each kset can support specific event variables; it can * supress the event generation or add subsystem specific * variables carried with the event. */ struct kset_uevent_ops { int (*filter)(struct kset *kset, struct kobject *kobj); const char *(*name)(struct kset *kset, struct kobject *kobj); int (*uevent)(struct kset *kset, struct kobject *kobj, char **envp, int num_envp, char *buffer, int buffer_size); }; struct kset { struct subsystem * subsys; struct kobj_type * ktype; struct list_head list; spinlock_t list_lock; struct kobject kobj; struct kset_uevent_ops * uevent_ops; }; extern void kset_init(struct kset * k); extern int kset_add(struct kset * k); extern int kset_register(struct kset * k); extern void kset_unregister(struct kset * k); static inline struct kset * to_kset(struct kobject * kobj) { return kobj ? container_of(kobj,struct kset,kobj) : NULL; } static inline struct kset * kset_get(struct kset * k) { return k ? to_kset(kobject_get(&k->kobj)) : NULL; } static inline void kset_put(struct kset * k) { kobject_put(&k->kobj); } static inline struct kobj_type * get_ktype(struct kobject * k) { if (k->kset && k->kset->ktype) return k->kset->ktype; else return k->ktype; } extern struct kobject * kset_find_obj(struct kset *, const char *); /** * Use this when initializing an embedded kset with no other * fields to initialize. */ #define set_kset_name(str) .kset = { .kobj = { .name = str } } struct subsystem { struct kset kset; struct rw_semaphore rwsem; }; #define decl_subsys(_name,_type,_uevent_ops) \ struct subsystem _name##_subsys = { \ .kset = { \ .kobj = { .name = __stringify(_name) }, \ .ktype = _type, \ .uevent_ops =_uevent_ops, \ } \ } #define decl_subsys_name(_varname,_name,_type,_uevent_ops) \ struct subsystem _varname##_subsys = { \ .kset = { \ .kobj = { .name = __stringify(_name) }, \ .ktype = _type, \ .uevent_ops =_uevent_ops, \ } \ } /* The global /sys/kernel/ subsystem for people to chain off of */ extern struct subsystem kernel_subsys; /** * Helpers for setting the kset of registered objects. * Often, a registered object belongs to a kset embedded in a * subsystem. These do no magic, just make the resulting code * easier to follow. */ /** * kobj_set_kset_s(obj,subsys) - set kset for embedded kobject. * @obj: ptr to some object type. * @subsys: a subsystem object (not a ptr). * * Can be used for any object type with an embedded ->kobj. */ #define kobj_set_kset_s(obj,subsys) \ (obj)->kobj.kset = &(subsys).kset /** * kset_set_kset_s(obj,subsys) - set kset for embedded kset. * @obj: ptr to some object type. * @subsys: a subsystem object (not a ptr). * * Can be used for any object type with an embedded ->kset. * Sets the kset of @obj's embedded kobject (via its embedded * kset) to @subsys.kset. This makes @obj a member of that * kset. */ #define kset_set_kset_s(obj,subsys) \ (obj)->kset.kobj.kset = &(subsys).kset /** * subsys_set_kset(obj,subsys) - set kset for subsystem * @obj: ptr to some object type. * @subsys: a subsystem object (not a ptr). * * Can be used for any object type with an embedded ->subsys. * Sets the kset of @obj's kobject to @subsys.kset. This makes * the object a member of that kset. */ #define subsys_set_kset(obj,_subsys) \ (obj)->subsys.kset.kobj.kset = &(_subsys).kset extern void subsystem_init(struct subsystem *); extern int subsystem_register(struct subsystem *); extern void subsystem_unregister(struct subsystem *); static inline struct subsystem * subsys_get(struct subsystem * s) { return s ? container_of(kset_get(&s->kset),struct subsystem,kset) : NULL; } static inline void subsys_put(struct subsystem * s) { kset_put(&s->kset); } struct subsys_attribute { struct attribute attr; ssize_t (*show)(struct subsystem *, char *); ssize_t (*store)(struct subsystem *, const char *, size_t); }; extern int subsys_create_file(struct subsystem * , struct subsys_attribute *); extern void subsys_remove_file(struct subsystem * , struct subsys_attribute *); #if defined(CONFIG_HOTPLUG) & defined(CONFIG_NET) void kobject_uevent(struct kobject *kobj, enum kobject_action action); int add_uevent_var(char **envp, int num_envp, int *cur_index, char *buffer, int buffer_size, int *cur_len, const char *format, ...) __attribute__((format (printf, 7, 8))); #else static inline void kobject_uevent(struct kobject *kobj, enum kobject_action action) { } static inline int add_uevent_var(char **envp, int num_envp, int *cur_index, char *buffer, int buffer_size, int *cur_len, const char *format, ...) { return 0; } #endif #endif /* __KERNEL__ */ #endif /* _KOBJECT_H_ */