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kobject: add kobject_add_ng function

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This is what the kobject_add function is going to become.

Add this to the kernel and then we can convert the tree over to use it.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2007-12-03 21:31:08 -08:00
parent e86000d042
commit 244f6cee9a
2 changed files with 69 additions and 0 deletions
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3
include/linux/kobject.h
View file

@ -81,6 +81,9 @@ static inline const char * kobject_name(const struct kobject * kobj)
extern void kobject_init(struct kobject *);
extern void kobject_init_ng(struct kobject *kobj, struct kobj_type *ktype);
extern int __must_check kobject_add(struct kobject *);
extern int __must_check kobject_add_ng(struct kobject *kobj,
struct kobject *parent,
const char *fmt, ...);
extern void kobject_del(struct kobject *);
extern int __must_check kobject_rename(struct kobject *, const char *new_name);

66
lib/kobject.c
View file

@ -324,6 +324,72 @@ error:
}
EXPORT_SYMBOL(kobject_init_ng);
static int kobject_add_varg(struct kobject *kobj, struct kobject *parent,
const char *fmt, va_list vargs)
{
va_list aq;
int retval;
va_copy(aq, vargs);
retval = kobject_set_name_vargs(kobj, fmt, aq);
va_end(aq);
if (retval) {
printk(KERN_ERR "kobject: can not set name properly!\n");
return retval;
}
kobj->parent = parent;
return kobject_add(kobj);
}
/**
* kobject_add_ng - the main kobject add function
* @kobj: the kobject to add
* @parent: pointer to the parent of the kobject.
* @fmt: format to name the kobject with.
*
* The kobject name is set and added to the kobject hierarchy in this
* function.
*
* If @parent is set, then the parent of the @kobj will be set to it.
* If @parent is NULL, then the parent of the @kobj will be set to the
* kobject associted with the kset assigned to this kobject. If no kset
* is assigned to the kobject, then the kobject will be located in the
* root of the sysfs tree.
*
* If this function returns an error, kobject_put() must be called to
* properly clean up the memory associated with the object.
*
* If the function is successful, the only way to properly clean up the
* memory is with a call to kobject_del(), in which case, a call to
* kobject_put() is not necessary (kobject_del() does the final
* kobject_put() to call the release function in the ktype's release
* pointer.)
*
* Under no instance should the kobject that is passed to this function
* be directly freed with a call to kfree(), that can leak memory.
*
* Note, no uevent will be created with this call, the caller should set
* up all of the necessary sysfs files for the object and then call
* kobject_uevent() with the UEVENT_ADD parameter to ensure that
* userspace is properly notified of this kobject's creation.
*/
int kobject_add_ng(struct kobject *kobj, struct kobject *parent,
const char *fmt, ...)
{
va_list args;
int retval;
if (!kobj)
return -EINVAL;
va_start(args, fmt);
retval = kobject_add_varg(kobj, parent, fmt, args);
va_end(args);
return retval;
}
EXPORT_SYMBOL(kobject_add_ng);
/**
* kobject_rename - change the name of an object
* @kobj: object in question.