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driver core: Introduce device_move(): move a device to a new parent.

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Provide a function device_move() to move a device to a new parent device. Add
auxilliary functions kobject_move() and sysfs_move_dir().
kobject_move() generates a new uevent of type KOBJ_MOVE, containing the
previous path (DEVPATH_OLD) in addition to the usual values. For this, a new
interface kobject_uevent_env() is created that allows to add further
environmental data to the uevent at the kobject layer.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Cornelia Huck 2006-11-20 17:07:51 +01:00 • committed by Greg Kroah-Hartman
parent af9e076536
commit 8a82472f86
7 changed files with 228 additions and 4 deletions
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8
include/linux/kobject.h
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@ -47,6 +47,7 @@ enum kobject_action {
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 {
@ -76,6 +77,7 @@ extern int __must_check kobject_add(struct kobject *);
extern void kobject_del(struct kobject *);
extern int __must_check kobject_rename(struct kobject *, const char *new_name);
extern int __must_check kobject_move(struct kobject *, struct kobject *);
extern int __must_check kobject_register(struct kobject *);
extern void kobject_unregister(struct kobject *);
@ -264,6 +266,8 @@ extern int __must_check subsys_create_file(struct subsystem * ,
#if defined(CONFIG_HOTPLUG)
void kobject_uevent(struct kobject *kobj, enum kobject_action action);
void 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,
@ -271,6 +275,10 @@ int add_uevent_var(char **envp, int num_envp, int *cur_index,
__attribute__((format (printf, 7, 8)));
#else
static inline void kobject_uevent(struct kobject *kobj, enum kobject_action action) { }
static inline void kobject_uevent_env(struct kobject *kobj,
enum kobject_action action,
char *envp[])
{ }
static inline int add_uevent_var(char **envp, int num_envp, int *cur_index,
char *buffer, int buffer_size, int *cur_len,