#include <linux/types.h>
#include <linux/list.h>
#include <linux/sysfs.h>
+#include <linux/compiler.h>
+#include <linux/spinlock.h>
#include <linux/rwsem.h>
#include <linux/kref.h>
+#include <linux/kernel.h>
+#include <linux/wait.h>
#include <asm/atomic.h>
-#define KOBJ_NAME_LEN 20
+#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 */
+ KOBJ_MOVE = (__force kobject_action_t) 0x08, /* device move */
+};
struct kobject {
- char * k_name;
+ const char * k_name;
char name[KOBJ_NAME_LEN];
struct kref kref;
struct list_head entry;
struct kset * kset;
struct kobj_type * ktype;
struct dentry * dentry;
+ wait_queue_head_t poll;
};
extern int kobject_set_name(struct kobject *, const char *, ...)
__attribute__((format(printf,2,3)));
-static inline char * kobject_name(struct kobject * kobj)
+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 int __must_check kobject_add(struct kobject *);
extern void kobject_del(struct kobject *);
-extern int kobject_rename(struct kobject *, char *new_name);
+extern int __must_check kobject_rename(struct kobject *, const char *new_name);
+extern int __must_check kobject_move(struct kobject *, struct kobject *);
-extern int kobject_register(struct kobject *);
+extern int __must_check kobject_register(struct kobject *);
extern void kobject_unregister(struct kobject *);
extern struct kobject * kobject_get(struct kobject *);
extern void kobject_put(struct kobject *);
-extern void kobject_hotplug(const char *action, struct kobject *);
+extern struct kobject *kobject_add_dir(struct kobject *, const char *);
-extern char * kobject_get_path(struct kset *, struct kobject *, int);
+extern char * kobject_get_path(struct kobject *, gfp_t);
struct kobj_type {
void (*release)(struct kobject *);
* of object; multiple ksets can belong to one subsystem. All
* ksets of a subsystem share the subsystem's lock.
*
- * Each kset can support hotplugging; if it does, it will be given
- * the opportunity to filter out specific kobjects from being
- * reported, as well as to add its own "data" elements to the
- * environment being passed to the hotplug helper.
+ * Each kset can support specific event variables; it can
+ * supress the event generation or add subsystem specific
+ * variables carried with the event.
*/
-struct kset_hotplug_ops {
+struct kset_uevent_ops {
int (*filter)(struct kset *kset, struct kobject *kobj);
- char *(*name)(struct kset *kset, struct kobject *kobj);
- int (*hotplug)(struct kset *kset, struct kobject *kobj, char **envp,
+ 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 subsystem * subsys;
struct kobj_type * ktype;
struct list_head list;
+ spinlock_t list_lock;
struct kobject kobj;
- struct kset_hotplug_ops * hotplug_ops;
+ 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 int __must_check kset_add(struct kset * k);
+extern int __must_check kset_register(struct kset * k);
extern void kset_unregister(struct kset * k);
static inline struct kset * to_kset(struct kobject * kobj)
struct rw_semaphore rwsem;
};
-#define decl_subsys(_name,_type,_hotplug_ops) \
+#define decl_subsys(_name,_type,_uevent_ops) \
struct subsystem _name##_subsys = { \
.kset = { \
.kobj = { .name = __stringify(_name) }, \
.ktype = _type, \
- .hotplug_ops =_hotplug_ops, \
+ .uevent_ops =_uevent_ops, \
} \
}
-#define decl_subsys_name(_varname,_name,_type,_hotplug_ops) \
+#define decl_subsys_name(_varname,_name,_type,_uevent_ops) \
struct subsystem _varname##_subsys = { \
.kset = { \
.kobj = { .name = __stringify(_name) }, \
.ktype = _type, \
- .hotplug_ops =_hotplug_ops, \
+ .uevent_ops =_uevent_ops, \
} \
}
+/* The global /sys/kernel/ subsystem for people to chain off of */
+extern struct subsystem kernel_subsys;
+/* The global /sys/hypervisor/ subsystem */
+extern struct subsystem hypervisor_subsys;
/**
* Helpers for setting the kset of registered objects.
(obj)->subsys.kset.kobj.kset = &(_subsys).kset
extern void subsystem_init(struct subsystem *);
-extern int subsystem_register(struct subsystem *);
+extern int __must_check subsystem_register(struct subsystem *);
extern void subsystem_unregister(struct subsystem *);
static inline struct subsystem * subsys_get(struct subsystem * s)
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 *);
+extern int __must_check subsys_create_file(struct subsystem * ,
+ struct subsys_attribute *);
+
+#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)));
+#else
+static inline int kobject_uevent(struct kobject *kobj, enum kobject_action action)
+{ return 0; }
+static inline int kobject_uevent_env(struct kobject *kobj,
+ enum kobject_action action,
+ 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, ...)
+{ return 0; }
+#endif
#endif /* __KERNEL__ */
#endif /* _KOBJECT_H_ */
git://git.onelab.eu / linux-2.6.git / blobdiff