X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fkobject.h;h=8b0aa715fa2f7981f7e1fe8e2b2d8d2ac3b8d4bf;hb=9e7bbccd0290e720e0874443932869c55f63d5a8;hp=aa2fe22b1baa64aa9e54c8b1bf4d5b3207956ac0;hpb=2e85622042cb5fd56a606e884651ffde52f21028;p=linux-2.6 diff --git a/include/linux/kobject.h b/include/linux/kobject.h index aa2fe22b1b..8b0aa715fa 100644 --- a/include/linux/kobject.h +++ b/include/linux/kobject.h @@ -1,8 +1,10 @@ /* * kobject.h - generic kernel object infrastructure. * - * Copyright (c) 2002-2003 Patrick Mochel - * Copyright (c) 2002-2003 Open Source Development Labs + * Copyright (c) 2002-2003 Patrick Mochel + * Copyright (c) 2002-2003 Open Source Development Labs + * Copyright (c) 2006-2007 Greg Kroah-Hartman + * Copyright (c) 2006-2007 Novell Inc. * * This file is released under the GPLv2. * @@ -29,6 +31,8 @@ #define KOBJ_NAME_LEN 20 #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[]; @@ -58,14 +62,12 @@ enum kobject_action { 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 sysfs_dirent * sd; - wait_queue_head_t poll; }; extern int kobject_set_name(struct kobject *, const char *, ...) @@ -77,17 +79,22 @@ static inline const char * kobject_name(const struct kobject * kobj) } extern void kobject_init(struct kobject *); -extern void kobject_cleanup(struct kobject *); +extern void kobject_init_ng(struct kobject *kobj, struct kobj_type *ktype); +extern int __must_check kobject_add_ng(struct kobject *kobj, + struct kobject *parent, + const char *fmt, ...); +extern int __must_check kobject_init_and_add(struct kobject *kobj, + struct kobj_type *ktype, + struct kobject *parent, + const char *fmt, ...); -extern int __must_check kobject_add(struct kobject *); -extern int __must_check kobject_shadow_add(struct kobject *kobj, - struct sysfs_dirent *shadow_parent); extern void kobject_del(struct kobject *); +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_shadow_rename(struct kobject *kobj, - struct sysfs_dirent *new_parent, - const char *new_name); extern int __must_check kobject_move(struct kobject *, struct kobject *); extern int __must_check kobject_register(struct kobject *); @@ -96,10 +103,6 @@ extern void kobject_unregister(struct kobject *); extern struct kobject * kobject_get(struct kobject *); extern void kobject_put(struct kobject *); -extern struct kobject *kobject_kset_add_dir(struct kset *kset, - struct kobject *, const char *); -extern struct kobject *kobject_add_dir(struct kobject *, const char *); - extern char * kobject_get_path(struct kobject *, gfp_t); struct kobj_type { @@ -108,44 +111,61 @@ struct kobj_type { struct attribute ** default_attrs; }; +struct kobj_uevent_env { + char *envp[UEVENT_NUM_ENVP]; + int envp_idx; + char buf[UEVENT_BUFFER_SIZE]; + int buflen; +}; -/** - * 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); + int (*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 struct sysfs_ops kobj_sysfs_ops; + +/** + * 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 kobj_type * ktype; struct list_head list; spinlock_t list_lock; struct kobject kobj; - struct kset_uevent_ops * uevent_ops; + struct kset_uevent_ops *uevent_ops; }; - extern void kset_init(struct kset * k); extern int __must_check kset_add(struct kset * k); extern int __must_check kset_register(struct kset * k); extern void kset_unregister(struct kset * k); +extern struct kset * __must_check kset_create_and_add(const char *name, + struct kset_uevent_ops *u, + struct kobject *parent_kobj); static inline struct kset * to_kset(struct kobject * kobj) { @@ -162,121 +182,40 @@ static inline void kset_put(struct kset * k) kobject_put(&k->kobj); } -static inline struct kobj_type * get_ktype(struct kobject * k) +static inline struct kobj_type *get_ktype(struct kobject *kobj) { - if (k->kset && k->kset->ktype) - return k->kset->ktype; - else - return k->ktype; + return kobj->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 } } - - -#define decl_subsys(_name,_type,_uevent_ops) \ -struct kset _name##_subsys = { \ - .kobj = { .name = __stringify(_name) }, \ - .ktype = _type, \ - .uevent_ops =_uevent_ops, \ -} -#define decl_subsys_name(_varname,_name,_type,_uevent_ops) \ -struct kset _varname##_subsys = { \ - .kobj = { .name = __stringify(_name) }, \ - .ktype = _type, \ - .uevent_ops =_uevent_ops, \ -} - -/* The global /sys/kernel/ subsystem for people to chain off of */ -extern struct kset kernel_subsys; -/* The global /sys/hypervisor/ subsystem */ -extern struct kset hypervisor_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_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) +#define set_kset_name(str) .kset = { .kobj = { .k_name = str } } -/** - * 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.kobj.kset = &(_subsys) - -extern void subsystem_init(struct kset *); -extern int __must_check subsystem_register(struct kset *); -extern void subsystem_unregister(struct kset *); - -static inline struct kset *subsys_get(struct kset *s) -{ - if (s) - return kset_get(s); - return NULL; -} - -static inline void subsys_put(struct kset *s) -{ - kset_put(s); -} - -struct subsys_attribute { - struct attribute attr; - ssize_t (*show)(struct kset *, char *); - ssize_t (*store)(struct kset *, const char *, size_t); -}; - -extern int __must_check subsys_create_file(struct kset *, - struct subsys_attribute *); +/* The global /sys/kernel/ kobject for people to chain off of */ +extern struct kobject *kernel_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; #if defined(CONFIG_HOTPLUG) int kobject_uevent(struct kobject *kobj, enum kobject_action action); int kobject_uevent_env(struct kobject *kobj, enum kobject_action action, char *envp[]); -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))); +int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...) + __attribute__((format (printf, 2, 3))); + +int kobject_action_type(const char *buf, size_t count, + enum kobject_action *type); #else static inline int kobject_uevent(struct kobject *kobj, enum kobject_action action) { return 0; } @@ -285,10 +224,12 @@ static inline int kobject_uevent_env(struct kobject *kobj, char *envp[]) { return 0; } -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, ...) +static inline int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...) { return 0; } + +static inline int kobject_action_type(const char *buf, size_t count, + enum kobject_action *type) +{ return -EINVAL; } #endif #endif /* __KERNEL__ */