* kobject.c - library routines for handling generic kernel objects
*
* Copyright (c) 2002-2003 Patrick Mochel <mochel@osdl.org>
+ * Copyright (c) 2006-2007 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (c) 2006-2007 Novell Inc.
*
* This file is released under the GPLv2.
*
return error;
}
-static int create_dir(struct kobject * kobj, struct dentry *shadow_parent)
+static int create_dir(struct kobject * kobj)
{
int error = 0;
if (kobject_name(kobj)) {
- error = sysfs_create_dir(kobj, shadow_parent);
+ error = sysfs_create_dir(kobj);
if (!error) {
if ((error = populate_dir(kobj)))
sysfs_remove_dir(kobj);
return;
kref_init(&kobj->kref);
INIT_LIST_HEAD(&kobj->entry);
- init_waitqueue_head(&kobj->poll);
kobj->kset = kset_get(kobj->kset);
}
}
/**
- * kobject_shadow_add - add an object to the hierarchy.
+ * kobject_add - add an object to the hierarchy.
* @kobj: object.
- * @shadow_parent: sysfs directory to add to.
*/
-int kobject_shadow_add(struct kobject * kobj, struct dentry *shadow_parent)
+int kobject_add(struct kobject * kobj)
{
int error = 0;
struct kobject * parent;
if (!(kobj = kobject_get(kobj)))
return -ENOENT;
if (!kobj->k_name)
- kobj->k_name = kobj->name;
+ kobject_set_name(kobj, "NO_NAME");
if (!*kobj->k_name) {
pr_debug("kobject attempted to be registered with no name!\n");
WARN_ON(1);
pr_debug("kobject %s: registering. parent: %s, set: %s\n",
kobject_name(kobj), parent ? kobject_name(parent) : "<NULL>",
- kobj->kset ? kobj->kset->kobj.name : "<NULL>" );
+ kobj->kset ? kobject_name(&kobj->kset->kobj) : "<NULL>" );
if (kobj->kset) {
spin_lock(&kobj->kset->list_lock);
kobj->parent = parent;
}
- error = create_dir(kobj, shadow_parent);
+ error = create_dir(kobj);
if (error) {
/* unlink does the kobject_put() for us */
unlink(kobj);
/* be noisy on error issues */
if (error == -EEXIST)
- printk("kobject_add failed for %s with -EEXIST, "
- "don't try to register things with the "
- "same name in the same directory.\n",
+ printk(KERN_ERR "kobject_add failed for %s with "
+ "-EEXIST, don't try to register things with "
+ "the same name in the same directory.\n",
kobject_name(kobj));
else
- printk("kobject_add failed for %s (%d)\n",
+ printk(KERN_ERR "kobject_add failed for %s (%d)\n",
kobject_name(kobj), error);
- dump_stack();
+ dump_stack();
}
return error;
}
/**
- * kobject_add - add an object to the hierarchy.
- * @kobj: object.
- */
-int kobject_add(struct kobject * kobj)
-{
- return kobject_shadow_add(kobj, NULL);
-}
-
-
-/**
* kobject_register - initialize and add an object.
* @kobj: object in question.
*/
int kobject_set_name(struct kobject * kobj, const char * fmt, ...)
{
int error = 0;
- int limit = KOBJ_NAME_LEN;
+ int limit;
int need;
va_list args;
- char * name;
+ char *name;
- /*
- * First, try the static array
- */
- va_start(args,fmt);
- need = vsnprintf(kobj->name,limit,fmt,args);
+ /* find out how big a buffer we need */
+ name = kmalloc(1024, GFP_KERNEL);
+ if (!name) {
+ error = -ENOMEM;
+ goto done;
+ }
+ va_start(args, fmt);
+ need = vsnprintf(name, 1024, fmt, args);
va_end(args);
- if (need < limit)
- name = kobj->name;
- else {
- /*
- * Need more space? Allocate it and try again
- */
- limit = need + 1;
- name = kmalloc(limit,GFP_KERNEL);
- if (!name) {
- error = -ENOMEM;
- goto Done;
- }
- va_start(args,fmt);
- need = vsnprintf(name,limit,fmt,args);
- va_end(args);
-
- /* Still? Give up. */
- if (need >= limit) {
- kfree(name);
- error = -EFAULT;
- goto Done;
- }
+ kfree(name);
+
+ /* Allocate the new space and copy the string in */
+ limit = need + 1;
+ name = kmalloc(limit, GFP_KERNEL);
+ if (!name) {
+ error = -ENOMEM;
+ goto done;
+ }
+ va_start(args, fmt);
+ need = vsnprintf(name, limit, fmt, args);
+ va_end(args);
+
+ /* something wrong with the string we copied? */
+ if (need >= limit) {
+ kfree(name);
+ error = -EFAULT;
+ goto done;
}
/* Free the old name, if necessary. */
- if (kobj->k_name && kobj->k_name != kobj->name)
- kfree(kobj->k_name);
+ kfree(kobj->k_name);
/* Now, set the new name */
kobj->k_name = name;
- Done:
+done:
return error;
}
-
EXPORT_SYMBOL(kobject_set_name);
-
/**
* kobject_rename - change the name of an object
* @kobj: object in question.
/* Note : if we want to send the new name alone, not the full path,
* we could probably use kobject_name(kobj); */
- error = sysfs_rename_dir(kobj, kobj->parent->dentry, new_name);
+ error = sysfs_rename_dir(kobj, new_name);
/* This function is mostly/only used for network interface.
* Some hotplug package track interfaces by their name and
}
/**
- * kobject_rename - change the name of an object
- * @kobj: object in question.
- * @new_parent: object's new parent
- * @new_name: object's new name
- */
-
-int kobject_shadow_rename(struct kobject * kobj, struct dentry *new_parent,
- const char *new_name)
-{
- int error = 0;
-
- kobj = kobject_get(kobj);
- if (!kobj)
- return -EINVAL;
- error = sysfs_rename_dir(kobj, new_parent, new_name);
- kobject_put(kobj);
-
- return error;
-}
-
-/**
* kobject_move - move object to another parent
* @kobj: object in question.
* @new_parent: object's new parent (can be NULL)
struct kobj_type * t = get_ktype(kobj);
struct kset * s = kobj->kset;
struct kobject * parent = kobj->parent;
+ const char *name = kobj->k_name;
pr_debug("kobject %s: cleaning up\n",kobject_name(kobj));
- if (kobj->k_name != kobj->name)
- kfree(kobj->k_name);
- kobj->k_name = NULL;
- if (t && t->release)
+ if (t && t->release) {
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 */
+ kfree(name);
+ }
if (s)
kset_put(s);
kobject_put(parent);
};
/**
- * kobject__kset_add_dir - add sub directory of object.
+ * 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_set_name(k, name);
ret = kobject_register(k);
if (ret < 0) {
- printk(KERN_WARNING "kobject_add_dir: "
- "kobject_register error: %d\n", ret);
+ printk(KERN_WARNING "%s: kobject_register error: %d\n",
+ __func__, ret);
kobject_del(k);
return NULL;
}
return k;
}
+/**
+ * kobject_add_dir - add sub directory of object.
+ * @parent: object in which a directory is created.
+ * @name: directory name.
+ *
+ * Add a plain directory object as child of given object.
+ */
struct kobject *kobject_add_dir(struct kobject *parent, const char *name)
{
return kobject_kset_add_dir(NULL, parent, name);
/**
* kset_add - add a kset object to the hierarchy.
* @k: kset.
- *
- * Simply, this adds the kset's embedded kobject to the
- * hierarchy.
- * We also try to make sure that the kset's embedded kobject
- * has a parent before it is added. We only care if the embedded
- * kobject is not part of a kset itself, since kobject_add()
- * assigns a parent in that case.
- * If that is the case, and the kset has a controlling subsystem,
- * then we set the kset's parent to be said subsystem.
*/
int kset_add(struct kset * k)
{
- if (!k->kobj.parent && !k->kobj.kset && k->subsys)
- k->kobj.parent = &k->subsys->kset.kobj;
-
return kobject_add(&k->kobj);
}
int kset_register(struct kset * k)
{
+ int err;
+
if (!k)
return -EINVAL;
+
kset_init(k);
- return kset_add(k);
+ err = kset_add(k);
+ if (err)
+ return err;
+ kobject_uevent(&k->kobj, KOBJ_ADD);
+ return 0;
}
return ret;
}
-
-void subsystem_init(struct subsystem * s)
-{
- init_rwsem(&s->rwsem);
- kset_init(&s->kset);
-}
-
-/**
- * subsystem_register - register a subsystem.
- * @s: the subsystem we're registering.
- *
- * Once we register the subsystem, we want to make sure that
- * the kset points back to this subsystem for correct usage of
- * the rwsem.
- */
-
-int subsystem_register(struct subsystem * s)
+int subsystem_register(struct kset *s)
{
- int error;
-
- if (!s)
- return -EINVAL;
-
- subsystem_init(s);
- pr_debug("subsystem %s: registering\n",s->kset.kobj.name);
-
- if (!(error = kset_add(&s->kset))) {
- if (!s->kset.subsys)
- s->kset.subsys = s;
- }
- return error;
+ return kset_register(s);
}
-void subsystem_unregister(struct subsystem * s)
+void subsystem_unregister(struct kset *s)
{
- if (!s)
- return;
- pr_debug("subsystem %s: unregistering\n",s->kset.kobj.name);
- kset_unregister(&s->kset);
+ kset_unregister(s);
}
-
/**
* subsystem_create_file - export sysfs attribute file.
* @s: subsystem.
* @a: subsystem attribute descriptor.
*/
-int subsys_create_file(struct subsystem * s, struct subsys_attribute * a)
+int subsys_create_file(struct kset *s, struct subsys_attribute *a)
{
int error = 0;
if (!s || !a)
return -EINVAL;
- if (subsys_get(s)) {
- error = sysfs_create_file(&s->kset.kobj,&a->attr);
- subsys_put(s);
+ if (kset_get(s)) {
+ error = sysfs_create_file(&s->kobj, &a->attr);
+ kset_put(s);
}
return error;
}
-
-/**
- * subsystem_remove_file - remove sysfs attribute file.
- * @s: subsystem.
- * @a: attribute desciptor.
- */
-#if 0
-void subsys_remove_file(struct subsystem * s, struct subsys_attribute * a)
-{
- if (subsys_get(s)) {
- sysfs_remove_file(&s->kset.kobj,&a->attr);
- subsys_put(s);
- }
-}
-#endif /* 0 */
-
EXPORT_SYMBOL(kobject_init);
EXPORT_SYMBOL(kobject_register);
EXPORT_SYMBOL(kobject_unregister);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff