}
EXPORT_SYMBOL_GPL(kobject_get_path);
-static void kobject_init_internal(struct kobject * kobj)
+/* add the kobject to its kset's list */
+static void kobj_kset_join(struct kobject *kobj)
{
- if (!kobj)
+ if (!kobj->kset)
return;
- kref_init(&kobj->kref);
- INIT_LIST_HEAD(&kobj->entry);
+
+ kset_get(kobj->kset);
+ spin_lock(&kobj->kset->list_lock);
+ list_add_tail(&kobj->entry, &kobj->kset->list);
+ spin_unlock(&kobj->kset->list_lock);
}
+/* remove the kobject from its kset's list */
+static void kobj_kset_leave(struct kobject *kobj)
+{
+ if (!kobj->kset)
+ return;
-/**
- * unlink - remove kobject from kset list.
- * @kobj: kobject.
- *
- * Remove the kobject from the kset list and decrement
- * its parent's refcount.
- * This is separated out, so we can use it in both
- * kobject_del() and kobject_add_internal() on error.
- */
+ spin_lock(&kobj->kset->list_lock);
+ list_del_init(&kobj->entry);
+ spin_unlock(&kobj->kset->list_lock);
+ kset_put(kobj->kset);
+}
-static void unlink(struct kobject * kobj)
+static void kobject_init_internal(struct kobject * kobj)
{
- struct kobject *parent = kobj->parent;
-
- if (kobj->kset) {
- spin_lock(&kobj->kset->list_lock);
- list_del_init(&kobj->entry);
- spin_unlock(&kobj->kset->list_lock);
- }
- kobj->parent = NULL;
- kobject_put(kobj);
- kobject_put(parent);
+ if (!kobj)
+ return;
+ kref_init(&kobj->kref);
+ INIT_LIST_HEAD(&kobj->entry);
}
+
static int kobject_add_internal(struct kobject *kobj)
{
int error = 0;
struct kobject * parent;
- if (!(kobj = kobject_get(kobj)))
+ if (!kobj)
return -ENOENT;
- if (!kobj->k_name)
- kobject_set_name(kobj, "NO_NAME");
- if (!*kobj->k_name) {
- pr_debug("kobject (%p) attempted to be registered with no "
+
+ if (!kobj->name || !kobj->name[0]) {
+ pr_debug("kobject: (%p): attempted to be registered with empty "
"name!\n", kobj);
WARN_ON(1);
- kobject_put(kobj);
return -EINVAL;
}
- parent = kobject_get(kobj->parent);
- 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>" );
+ parent = kobject_get(kobj->parent);
+ /* join kset if set, use it as parent if we do not already have one */
if (kobj->kset) {
- 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);
- }
-
- spin_lock(&kobj->kset->list_lock);
- list_add_tail(&kobj->entry, &kobj->kset->list);
- spin_unlock(&kobj->kset->list_lock);
+ kobj_kset_join(kobj);
kobj->parent = parent;
}
+ 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>" );
+
error = create_dir(kobj);
if (error) {
- /* unlink does the kobject_put() for us */
- unlink(kobj);
+ kobj_kset_leave(kobj);
+ kobject_put(parent);
+ kobj->parent = NULL;
/* be noisy on error issues */
if (error == -EEXIST)
printk(KERN_ERR "%s failed for %s (%d)\n",
__FUNCTION__, kobject_name(kobj), error);
dump_stack();
- }
-
- return error;
-}
+ } else
+ kobj->state_in_sysfs = 1;
-/**
- * kobject_register - initialize and add an object.
- * @kobj: object in question.
- */
-
-int kobject_register(struct kobject * kobj)
-{
- int error = -EINVAL;
- if (kobj) {
- kobject_init_internal(kobj);
- error = kobject_add(kobj);
- if (!error)
- kobject_uevent(kobj, KOBJ_ADD);
- }
return error;
}
return -ENOMEM;
/* Free the old name, if necessary. */
- kfree(kobj->k_name);
+ kfree(kobj->name);
/* Now, set the new name */
- kobj->k_name = name;
+ kobj->name = name;
return 0;
}
EXPORT_SYMBOL(kobject_set_name);
/**
- * kobject_init_ng - initialize a kobject structure
+ * kobject_init - initialize a kobject structure
* @kobj: pointer to the kobject to initialize
* @ktype: pointer to the ktype for this kobject.
*
* to kobject_put(), not by a call to kfree directly to ensure that all of
* the memory is cleaned up properly.
*/
-void kobject_init_ng(struct kobject *kobj, struct kobj_type *ktype)
+void kobject_init(struct kobject *kobj, struct kobj_type *ktype)
{
char *err_str;
err_str = "must have a ktype to be initialized properly!\n";
goto error;
}
- if (atomic_read(&kobj->kref.refcount)) {
+ if (kobj->state_initialized) {
/* do not error out as sometimes we can recover */
- printk(KERN_ERR "kobject: reference count is already set, "
- "something is seriously wrong.\n");
+ printk(KERN_ERR "kobject (%p): tried to init an initialized "
+ "object, something is seriously wrong.\n", kobj);
dump_stack();
}
kref_init(&kobj->kref);
INIT_LIST_HEAD(&kobj->entry);
kobj->ktype = ktype;
+ kobj->state_in_sysfs = 0;
+ kobj->state_add_uevent_sent = 0;
+ kobj->state_remove_uevent_sent = 0;
+ kobj->state_initialized = 1;
return;
error:
- printk(KERN_ERR "kobject: %s\n", err_str);
+ printk(KERN_ERR "kobject (%p): %s\n", kobj, err_str);
dump_stack();
}
-EXPORT_SYMBOL(kobject_init_ng);
+EXPORT_SYMBOL(kobject_init);
static int kobject_add_varg(struct kobject *kobj, struct kobject *parent,
const char *fmt, va_list vargs)
*
* 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
+ * Note, no "add" 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.
if (!kobj)
return -EINVAL;
+ if (!kobj->state_initialized) {
+ printk(KERN_ERR "kobject '%s' (%p): tried to add an "
+ "uninitialized object, something is seriously wrong.\n",
+ kobject_name(kobj), kobj);
+ dump_stack();
+ return -EINVAL;
+ }
va_start(args, fmt);
retval = kobject_add_varg(kobj, parent, fmt, args);
va_end(args);
* @parent: pointer to the parent of this kobject.
* @fmt: the name of the kobject.
*
- * This function combines the call to kobject_init_ng() and
+ * This function combines the call to kobject_init() and
* kobject_add(). The same type of error handling after a call to
* kobject_add() and kobject lifetime rules are the same here.
*/
va_list args;
int retval;
- kobject_init_ng(kobj, ktype);
+ kobject_init(kobj, ktype);
va_start(args, fmt);
retval = kobject_add_varg(kobj, parent, fmt, args);
{
if (!kobj)
return;
- sysfs_remove_dir(kobj);
- unlink(kobj);
-}
-
-/**
- * kobject_unregister - remove object from hierarchy and decrement refcount.
- * @kobj: object going away.
- */
-void kobject_unregister(struct kobject * kobj)
-{
- if (!kobj)
- return;
- pr_debug("kobject: '%s' (%p): %s\n",
- kobject_name(kobj), kobj, __FUNCTION__);
- kobject_uevent(kobj, KOBJ_REMOVE);
- kobject_del(kobj);
- kobject_put(kobj);
+ sysfs_remove_dir(kobj);
+ kobj->state_in_sysfs = 0;
+ kobj_kset_leave(kobj);
+ kobject_put(kobj->parent);
+ kobj->parent = NULL;
}
/**
*/
static void kobject_cleanup(struct kobject *kobj)
{
- struct kobj_type * t = get_ktype(kobj);
- struct kset * s = kobj->kset;
- const char *name = kobj->k_name;
+ struct kobj_type *t = get_ktype(kobj);
+ const char *name = kobj->name;
pr_debug("kobject: '%s' (%p): %s\n",
kobject_name(kobj), kobj, __FUNCTION__);
+
+ if (t && !t->release)
+ pr_debug("kobject: '%s' (%p): does not have a release() "
+ "function, it is broken and must be fixed.\n",
+ kobject_name(kobj), kobj);
+
+ /* send "remove" if the caller did not do it but sent "add" */
+ if (kobj->state_add_uevent_sent && !kobj->state_remove_uevent_sent) {
+ pr_debug("kobject: '%s' (%p): auto cleanup 'remove' event\n",
+ kobject_name(kobj), kobj);
+ kobject_uevent(kobj, KOBJ_REMOVE);
+ }
+
+ /* remove from sysfs if the caller did not do it */
+ if (kobj->state_in_sysfs) {
+ pr_debug("kobject: '%s' (%p): auto cleanup kobject_del\n",
+ kobject_name(kobj), kobj);
+ kobject_del(kobj);
+ }
+
if (t && t->release) {
+ pr_debug("kobject: '%s' (%p): calling ktype release\n",
+ kobject_name(kobj), kobj);
t->release(kobj);
- /* If we have a release function, we can guess that this was
- * not a statically allocated kobject, so we should be safe to
- * free the name */
+ }
+
+ /* free name if we allocated it */
+ if (name) {
+ pr_debug("kobject: '%s': free name\n", name);
kfree(name);
}
- if (s)
- kset_put(s);
}
static void kobject_release(struct kref *kref)
static void dynamic_kobj_release(struct kobject *kobj)
{
- pr_debug("kobject: '%s' (%p): %s\n",
- kobject_name(kobj), kobj, __FUNCTION__);
+ pr_debug("kobject: (%p): %s\n", kobj, __FUNCTION__);
kfree(kobj);
}
*
* 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
+ * call to kobject_put() and not kfree(), as kobject_init() has
* already been called on this structure.
*/
struct kobject *kobject_create(void)
if (!kobj)
return NULL;
- kobject_init_ng(kobj, &dynamic_kobj_ktype);
+ kobject_init(kobj, &dynamic_kobj_ktype);
return kobj;
}
*
* 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
+ * kobject_put() 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.
.store = kobj_attr_store,
};
-/**
- * kset_add - add a kset object to the hierarchy.
- * @k: kset.
- */
-
-int kset_add(struct kset * k)
-{
- return kobject_add_internal(&k->kobj);
-}
-
-
/**
* kset_register - initialize and add a kset.
* @k: kset.
return -EINVAL;
kset_init(k);
- err = kset_add(k);
+ err = kobject_add_internal(&k->kobj);
if (err)
return err;
kobject_uevent(&k->kobj, KOBJ_ADD);
{
if (!k)
return;
- kobject_unregister(&k->kobj);
+ kobject_put(&k->kobj);
}
}
EXPORT_SYMBOL_GPL(kset_create_and_add);
-EXPORT_SYMBOL(kobject_register);
-EXPORT_SYMBOL(kobject_unregister);
EXPORT_SYMBOL(kobject_get);
EXPORT_SYMBOL(kobject_put);
EXPORT_SYMBOL(kobject_del);