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class: Implement support for class attrs in tagged sysfs directories.

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Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2011-10-12 21:55:08 +00:00 • committed by David S. Miller
commit 672d82c18d
2 changed files with 17 additions and 2 deletions
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17
drivers/base/class.c
View file

@ -47,6 +47,18 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr,
return ret; return ret;
} }
static const void *class_attr_namespace(struct kobject *kobj,
const struct attribute *attr)
{
struct class_attribute *class_attr = to_class_attr(attr);
struct subsys_private *cp = to_subsys_private(kobj);
const void *ns = NULL;
if (class_attr->namespace)
ns = class_attr->namespace(cp->class, class_attr);
return ns;
}
static void class_release(struct kobject *kobj) static void class_release(struct kobject *kobj)
{ {
struct subsys_private *cp = to_subsys_private(kobj); struct subsys_private *cp = to_subsys_private(kobj);
@ -72,8 +84,9 @@ static const struct kobj_ns_type_operations *class_child_ns_type(struct kobject
} }
static const struct sysfs_ops class_sysfs_ops = { static const struct sysfs_ops class_sysfs_ops = {
.show = class_attr_show, .show = class_attr_show,
.store = class_attr_store, .store = class_attr_store,
.namespace = class_attr_namespace,
}; };
static struct kobj_type class_ktype = { static struct kobj_type class_ktype = {

2
include/linux/device.h
View file

@ -350,6 +350,8 @@ struct class_attribute {
char *buf); char *buf);
ssize_t (*store)(struct class *class, struct class_attribute *attr, ssize_t (*store)(struct class *class, struct class_attribute *attr,
const char *buf, size_t count); const char *buf, size_t count);
const void *(*namespace)(struct class *class,
const struct class_attribute *attr);
}; };
#define CLASS_ATTR(_name, _mode, _show, _store) \ #define CLASS_ATTR(_name, _mode, _show, _store) \