Commit aa30f47c authored by Kimberly Brown's avatar Kimberly Brown Committed by Greg Kroah-Hartman

kobject: Add support for default attribute groups to kobj_type

kobj_type currently uses a list of individual attributes to store
default attributes. Attribute groups are more flexible than a list of
attributes because groups provide support for attribute visibility. So,
add support for default attribute groups to kobj_type.

In future patches, the existing uses of kobj_type’s attribute list will
be converted to attribute groups. When that is complete, kobj_type’s
attribute list, “default_attrs”, will be removed.
Signed-off-by: default avatarKimberly Brown <kimbrownkd@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0b777eee
......@@ -139,7 +139,8 @@ static inline bool kobject_has_children(struct kobject *kobj)
struct kobj_type {
void (*release)(struct kobject *kobj);
const struct sysfs_ops *sysfs_ops;
struct attribute **default_attrs;
struct attribute **default_attrs; /* use default_groups instead */
const struct attribute_group **default_groups;
const struct kobj_ns_type_operations *(*child_ns_type)(struct kobject *kobj);
const void *(*namespace)(struct kobject *kobj);
void (*get_ownership)(struct kobject *kobj, kuid_t *uid, kgid_t *gid);
......
......@@ -82,6 +82,7 @@ static int populate_dir(struct kobject *kobj)
static int create_dir(struct kobject *kobj)
{
const struct kobj_type *ktype = get_ktype(kobj);
const struct kobj_ns_type_operations *ops;
int error;
......@@ -95,6 +96,14 @@ static int create_dir(struct kobject *kobj)
return error;
}
if (ktype) {
error = sysfs_create_groups(kobj, ktype->default_groups);
if (error) {
sysfs_remove_dir(kobj);
return error;
}
}
/*
* @kobj->sd may be deleted by an ancestor going away. Hold an
* extra reference so that it stays until @kobj is gone.
......@@ -584,11 +593,16 @@ EXPORT_SYMBOL_GPL(kobject_move);
void kobject_del(struct kobject *kobj)
{
struct kernfs_node *sd;
const struct kobj_type *ktype = get_ktype(kobj);
if (!kobj)
return;
sd = kobj->sd;
if (ktype)
sysfs_remove_groups(kobj, ktype->default_groups);
sysfs_remove_dir(kobj);
sysfs_put(sd);
......
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