diff options
Diffstat (limited to 'drivers/base/core.c')
-rw-r--r-- | drivers/base/core.c | 77 |
1 files changed, 63 insertions, 14 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 356dd01..f069991 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -131,9 +131,21 @@ static void device_release(struct kobject *kobj) kfree(p); } +static const void *device_namespace(struct kobject *kobj) +{ + struct device *dev = to_dev(kobj); + const void *ns = NULL; + + if (dev->class && dev->class->ns_type) + ns = dev->class->namespace(dev); + + return ns; +} + static struct kobj_type device_ktype = { .release = device_release, .sysfs_ops = &dev_sysfs_ops, + .namespace = device_namespace, }; @@ -595,11 +607,59 @@ static struct kobject *virtual_device_parent(struct device *dev) return virtual_dir; } -static struct kobject *get_device_parent(struct device *dev, - struct device *parent) +struct class_dir { + struct kobject kobj; + struct class *class; +}; + +#define to_class_dir(obj) container_of(obj, struct class_dir, kobj) + +static void class_dir_release(struct kobject *kobj) +{ + struct class_dir *dir = to_class_dir(kobj); + kfree(dir); +} + +static const +struct kobj_ns_type_operations *class_dir_child_ns_type(struct kobject *kobj) { + struct class_dir *dir = to_class_dir(kobj); + return dir->class->ns_type; +} + +static struct kobj_type class_dir_ktype = { + .release = class_dir_release, + .sysfs_ops = &kobj_sysfs_ops, + .child_ns_type = class_dir_child_ns_type +}; + +static struct kobject * +class_dir_create_and_add(struct class *class, struct kobject *parent_kobj) +{ + struct class_dir *dir; int retval; + dir = kzalloc(sizeof(*dir), GFP_KERNEL); + if (!dir) + return NULL; + + dir->class = class; + kobject_init(&dir->kobj, &class_dir_ktype); + + dir->kobj.kset = &class->p->class_dirs; + + retval = kobject_add(&dir->kobj, parent_kobj, "%s", class->name); + if (retval < 0) { + kobject_put(&dir->kobj); + return NULL; + } + return &dir->kobj; +} + + +static struct kobject *get_device_parent(struct device *dev, + struct device *parent) +{ if (dev->class) { static DEFINE_MUTEX(gdp_mutex); struct kobject *kobj = NULL; @@ -634,18 +694,7 @@ static struct kobject *get_device_parent(struct device *dev, } /* or create a new class-directory at the parent device */ - k = kobject_create(); - if (!k) { - mutex_unlock(&gdp_mutex); - return NULL; - } - k->kset = &dev->class->p->class_dirs; - retval = kobject_add(k, parent_kobj, "%s", dev->class->name); - if (retval < 0) { - mutex_unlock(&gdp_mutex); - kobject_put(k); - return NULL; - } + k = class_dir_create_and_add(dev->class, parent_kobj); /* do not emit an uevent for this simple "glue" directory */ mutex_unlock(&gdp_mutex); return k; |