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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. |
| */ |
| |
| #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> |
| |
| #define UEVENT_HELPER_PATH_LEN 256 |
| #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 { |
| 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 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; |
| }; |
| |
| 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); |
| |
| static inline const char *kobject_name(const struct kobject *kobj) |
| { |
| return kobj->name; |
| } |
| |
| 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 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 *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; |
| //} |
| |
| //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 *kobj) |
| { |
| return kobj->ktype; |
| } |
| |
| //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_ */ |