*(path + --length) = '/';
}
- pr_debug("%s: path = '%s'\n",__FUNCTION__,path);
+ pr_debug("kobject: '%s' (%p): %s: path = '%s'\n", kobject_name(kobj),
+ kobj, __FUNCTION__,path);
}
/**
return;
kref_init(&kobj->kref);
INIT_LIST_HEAD(&kobj->entry);
- kobj->kset = kset_get(kobj->kset);
}
if (!kobj->k_name)
kobject_set_name(kobj, "NO_NAME");
if (!*kobj->k_name) {
- pr_debug("kobject attempted to be registered with no name!\n");
+ pr_debug("kobject (%p) attempted to be registered with no "
+ "name!\n", kobj);
WARN_ON(1);
kobject_put(kobj);
return -EINVAL;
}
parent = kobject_get(kobj->parent);
- pr_debug("kobject %s: registering. parent: %s, set: %s\n",
- kobject_name(kobj), parent ? kobject_name(parent) : "<NULL>",
+ pr_debug("kobject: '%s' (%p): %s: parent: '%s', set: '%s'\n",
+ kobject_name(kobj), kobj, __FUNCTION__,
+ parent ? kobject_name(parent) : "<NULL>",
kobj->kset ? kobject_name(&kobj->kset->kobj) : "<NULL>" );
if (kobj->kset) {
- spin_lock(&kobj->kset->list_lock);
+ kobj->kset = kset_get(kobj->kset);
- if (!parent)
+ if (!parent) {
parent = kobject_get(&kobj->kset->kobj);
+ /*
+ * If the kset is our parent, get a second
+ * reference, we drop both the kset and the
+ * parent ref on cleanup
+ */
+ kobject_get(parent);
+ }
- list_add_tail(&kobj->entry,&kobj->kset->list);
+ spin_lock(&kobj->kset->list_lock);
+ list_add_tail(&kobj->entry, &kobj->kset->list);
spin_unlock(&kobj->kset->list_lock);
kobj->parent = parent;
}
}
EXPORT_SYMBOL(kobject_add_ng);
+/**
+ * kobject_init_and_add - initialize a kobject structure and add it to the kobject hierarchy
+ * @kobj: pointer to the kobject to initialize
+ * @ktype: pointer to the ktype for this kobject.
+ * @parent: pointer to the parent of this kobject.
+ * @fmt: the name of the kobject.
+ *
+ * This function combines the call to kobject_init_ng() and
+ * kobject_add_ng(). The same type of error handling after a call to
+ * kobject_add_ng() and kobject lifetime rules are the same here.
+ */
+int kobject_init_and_add(struct kobject *kobj, struct kobj_type *ktype,
+ struct kobject *parent, const char *fmt, ...)
+{
+ va_list args;
+ int retval;
+
+ kobject_init_ng(kobj, ktype);
+
+ va_start(args, fmt);
+ retval = kobject_add_varg(kobj, parent, fmt, args);
+ va_end(args);
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(kobject_init_and_add);
+
/**
* kobject_rename - change the name of an object
* @kobj: object in question.
{
if (!kobj)
return;
- pr_debug("kobject %s: unregistering\n",kobject_name(kobj));
+ pr_debug("kobject: '%s' (%p): %s\n",
+ kobject_name(kobj), kobj, __FUNCTION__);
kobject_uevent(kobj, KOBJ_REMOVE);
kobject_del(kobj);
kobject_put(kobj);
struct kobject * parent = kobj->parent;
const char *name = kobj->k_name;
- pr_debug("kobject %s: cleaning up\n",kobject_name(kobj));
+ pr_debug("kobject: '%s' (%p): %s\n",
+ kobject_name(kobj), kobj, __FUNCTION__);
if (t && t->release) {
t->release(kobj);
/* If we have a release function, we can guess that this was
kref_put(&kobj->kref, kobject_release);
}
-
-static void dir_release(struct kobject *kobj)
+static void dynamic_kobj_release(struct kobject *kobj)
{
+ pr_debug("kobject: '%s' (%p): %s\n",
+ kobject_name(kobj), kobj, __FUNCTION__);
kfree(kobj);
}
-static struct kobj_type dir_ktype = {
- .release = dir_release,
- .sysfs_ops = NULL,
- .default_attrs = NULL,
+static struct kobj_type dynamic_kobj_ktype = {
+ .release = dynamic_kobj_release,
+ .sysfs_ops = &kobj_sysfs_ops,
};
/**
- * kobject_kset_add_dir - add sub directory of object.
- * @kset: kset the directory is belongs to.
- * @parent: object in which a directory is created.
- * @name: directory name.
+ * kobject_create - create a struct kobject dynamically
+ *
+ * This function creates a kobject structure dynamically and sets it up
+ * to be a "dynamic" kobject with a default release function set up.
*
- * Add a plain directory object as child of given object.
+ * If the kobject was not able to be created, NULL will be returned.
+ * The kobject structure returned from here must be cleaned up with a
+ * call to kobject_put() and not kfree(), as kobject_init_ng() has
+ * already been called on this structure.
*/
-struct kobject *kobject_kset_add_dir(struct kset *kset,
- struct kobject *parent, const char *name)
+struct kobject *kobject_create(void)
{
- struct kobject *k;
- int ret;
-
- if (!parent)
- return NULL;
-
- k = kzalloc(sizeof(*k), GFP_KERNEL);
- if (!k)
- return NULL;
+ struct kobject *kobj;
- k->kset = kset;
- k->parent = parent;
- k->ktype = &dir_ktype;
- kobject_set_name(k, name);
- ret = kobject_register(k);
- if (ret < 0) {
- printk(KERN_WARNING "%s: kobject_register error: %d\n",
- __func__, ret);
- kobject_del(k);
+ kobj = kzalloc(sizeof(*kobj), GFP_KERNEL);
+ if (!kobj)
return NULL;
- }
- return k;
+ kobject_init_ng(kobj, &dynamic_kobj_ktype);
+ return kobj;
}
/**
- * kobject_add_dir - add sub directory of object.
- * @parent: object in which a directory is created.
- * @name: directory name.
+ * kobject_create_and_add - create a struct kobject dynamically and register it with sysfs
*
- * Add a plain directory object as child of given object.
+ * @name: the name for the kset
+ * @parent: the parent kobject of this kobject, if any.
+ *
+ * This function creates a kset structure dynamically and registers it
+ * with sysfs. When you are finished with this structure, call
+ * kobject_unregister() and the structure will be dynamically freed when
+ * it is no longer being used.
+ *
+ * If the kobject was not able to be created, NULL will be returned.
*/
-struct kobject *kobject_add_dir(struct kobject *parent, const char *name)
+struct kobject *kobject_create_and_add(const char *name, struct kobject *parent)
{
- return kobject_kset_add_dir(NULL, parent, name);
+ struct kobject *kobj;
+ int retval;
+
+ kobj = kobject_create();
+ if (!kobj)
+ return NULL;
+
+ retval = kobject_add_ng(kobj, parent, "%s", name);
+ if (retval) {
+ printk(KERN_WARNING "%s: kobject_add error: %d\n",
+ __FUNCTION__, retval);
+ kobject_put(kobj);
+ kobj = NULL;
+ }
+ return kobj;
}
+EXPORT_SYMBOL_GPL(kobject_create_and_add);
/**
* kset_init - initialize a kset for use
spin_lock_init(&k->list_lock);
}
+/* default kobject attribute operations */
+static ssize_t kobj_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct kobj_attribute *kattr;
+ ssize_t ret = -EIO;
+
+ kattr = container_of(attr, struct kobj_attribute, attr);
+ if (kattr->show)
+ ret = kattr->show(kobj, kattr, buf);
+ return ret;
+}
+
+static ssize_t kobj_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t count)
+{
+ struct kobj_attribute *kattr;
+ ssize_t ret = -EIO;
+
+ kattr = container_of(attr, struct kobj_attribute, attr);
+ if (kattr->store)
+ ret = kattr->store(kobj, kattr, buf, count);
+ return ret;
+}
+
+struct sysfs_ops kobj_sysfs_ops = {
+ .show = kobj_attr_show,
+ .store = kobj_attr_store,
+};
/**
* kset_add - add a kset object to the hierarchy.
return ret;
}
-int subsystem_register(struct kset *s)
+static void kset_release(struct kobject *kobj)
{
- return kset_register(s);
+ struct kset *kset = container_of(kobj, struct kset, kobj);
+ pr_debug("kobject: '%s' (%p): %s\n",
+ kobject_name(kobj), kobj, __FUNCTION__);
+ kfree(kset);
}
-void subsystem_unregister(struct kset *s)
+static struct kobj_type kset_ktype = {
+ .sysfs_ops = &kobj_sysfs_ops,
+ .release = kset_release,
+};
+
+/**
+ * kset_create - create a struct kset dynamically
+ *
+ * @name: the name for the kset
+ * @uevent_ops: a struct kset_uevent_ops for the kset
+ * @parent_kobj: the parent kobject of this kset, if any.
+ *
+ * This function creates a kset structure dynamically. This structure can
+ * then be registered with the system and show up in sysfs with a call to
+ * kset_register(). When you are finished with this structure, if
+ * kset_register() has been called, call kset_unregister() and the
+ * structure will be dynamically freed when it is no longer being used.
+ *
+ * If the kset was not able to be created, NULL will be returned.
+ */
+static struct kset *kset_create(const char *name,
+ struct kset_uevent_ops *uevent_ops,
+ struct kobject *parent_kobj)
{
- kset_unregister(s);
+ struct kset *kset;
+
+ kset = kzalloc(sizeof(*kset), GFP_KERNEL);
+ if (!kset)
+ return NULL;
+ kobject_set_name(&kset->kobj, name);
+ kset->uevent_ops = uevent_ops;
+ kset->kobj.parent = parent_kobj;
+
+ /*
+ * The kobject of this kset will have a type of kset_ktype and belong to
+ * no kset itself. That way we can properly free it when it is
+ * finished being used.
+ */
+ kset->kobj.ktype = &kset_ktype;
+ kset->kobj.kset = NULL;
+
+ return kset;
}
/**
- * subsystem_create_file - export sysfs attribute file.
- * @s: subsystem.
- * @a: subsystem attribute descriptor.
+ * kset_create_and_add - create a struct kset dynamically and add it to sysfs
+ *
+ * @name: the name for the kset
+ * @uevent_ops: a struct kset_uevent_ops for the kset
+ * @parent_kobj: the parent kobject of this kset, if any.
+ *
+ * This function creates a kset structure dynamically and registers it
+ * with sysfs. When you are finished with this structure, call
+ * kset_unregister() and the structure will be dynamically freed when it
+ * is no longer being used.
+ *
+ * If the kset was not able to be created, NULL will be returned.
*/
-
-int subsys_create_file(struct kset *s, struct subsys_attribute *a)
+struct kset *kset_create_and_add(const char *name,
+ struct kset_uevent_ops *uevent_ops,
+ struct kobject *parent_kobj)
{
- int error = 0;
-
- if (!s || !a)
- return -EINVAL;
+ struct kset *kset;
+ int error;
- if (kset_get(s)) {
- error = sysfs_create_file(&s->kobj, &a->attr);
- kset_put(s);
+ kset = kset_create(name, uevent_ops, parent_kobj);
+ if (!kset)
+ return NULL;
+ error = kset_register(kset);
+ if (error) {
+ kfree(kset);
+ return NULL;
}
- return error;
+ return kset;
}
+EXPORT_SYMBOL_GPL(kset_create_and_add);
EXPORT_SYMBOL(kobject_init);
EXPORT_SYMBOL(kobject_register);
EXPORT_SYMBOL(kset_register);
EXPORT_SYMBOL(kset_unregister);
-
-EXPORT_SYMBOL(subsystem_register);
-EXPORT_SYMBOL(subsystem_unregister);
-EXPORT_SYMBOL(subsys_create_file);
projects / linux-2.6-omap-h63xx.git / blobdiff