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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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28
lib/kobject_uevent.c
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@ -50,18 +50,22 @@ static char *action_to_string(enum kobject_action action)
return "offline";
case KOBJ_ONLINE:
return "online";
case KOBJ_MOVE:
return "move";
default:
return NULL;
}
}
/**
* kobject_uevent - notify userspace by ending an uevent
* kobject_uevent_env - send an uevent with environmental data
*
* @action: action that is happening (usually KOBJ_ADD and KOBJ_REMOVE)
* @action: action that is happening (usually KOBJ_MOVE)
* @kobj: struct kobject that the action is happening to
* @envp_ext: pointer to environmental data
*/
void kobject_uevent(struct kobject *kobj, enum kobject_action action)
void kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
char *envp_ext[])
{
char **envp;
char *buffer;
@ -76,6 +80,7 @@ void kobject_uevent(struct kobject *kobj, enum kobject_action action)
char *seq_buff;
int i = 0;
int retval;
int j;
pr_debug("%s\n", __FUNCTION__);
@ -134,7 +139,8 @@ void kobject_uevent(struct kobject *kobj, enum kobject_action action)
scratch += sprintf (scratch, "DEVPATH=%s", devpath) + 1;
envp [i++] = scratch;
scratch += sprintf(scratch, "SUBSYSTEM=%s", subsystem) + 1;
for (j = 0; envp_ext && envp_ext[j]; j++)
envp[i++] = envp_ext[j];
/* just reserve the space, overwrite it after kset call has returned */
envp[i++] = seq_buff = scratch;
scratch += strlen("SEQNUM=18446744073709551616") + 1;
@ -200,6 +206,20 @@ exit:
kfree(envp);
return;
}
EXPORT_SYMBOL_GPL(kobject_uevent_env);
/**
* kobject_uevent - notify userspace by ending an uevent
*
* @action: action that is happening (usually KOBJ_ADD and KOBJ_REMOVE)
* @kobj: struct kobject that the action is happening to
*/
void kobject_uevent(struct kobject *kobj, enum kobject_action action)
{
kobject_uevent_env(kobj, action, NULL);
}
EXPORT_SYMBOL_GPL(kobject_uevent);
/**