1 files changed, 0 insertions, 296 deletions
diff --git a/ipc/kdbus/domain.c b/ipc/kdbus/domain.c
deleted file mode 100644
index 5d52d009d..000000000
--- a/ipc/kdbus/domain.c
+++ /dev/null
@@ -1,296 +0,0 @@
-/*
- * Copyright (C) 2013-2015 Kay Sievers
- * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- * Copyright (C) 2013-2015 Daniel Mack <daniel@zonque.org>
- * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@gmail.com>
- * Copyright (C) 2013-2015 Linux Foundation
- * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@opendz.org>
- *
- * kdbus is free software; you can redistribute it and/or modify it under
- * the terms of the GNU Lesser General Public License as published by the
- * Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- */
-
-#include <linux/fs.h>
-#include <linux/idr.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/sizes.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-
-#include "bus.h"
-#include "domain.h"
-#include "handle.h"
-#include "item.h"
-#include "limits.h"
-#include "util.h"
-
-static void kdbus_domain_control_free(struct kdbus_node *node)
-{
-	kfree(node);
-}
-
-static struct kdbus_node *kdbus_domain_control_new(struct kdbus_domain *domain,
-						   unsigned int access)
-{
-	struct kdbus_node *node;
-	int ret;
-
-	node = kzalloc(sizeof(*node), GFP_KERNEL);
-	if (!node)
-		return ERR_PTR(-ENOMEM);
-
-	kdbus_node_init(node, KDBUS_NODE_CONTROL);
-
-	node->free_cb = kdbus_domain_control_free;
-	node->mode = domain->node.mode;
-	node->mode = S_IRUSR | S_IWUSR;
-	if (access & (KDBUS_MAKE_ACCESS_GROUP | KDBUS_MAKE_ACCESS_WORLD))
-		node->mode |= S_IRGRP | S_IWGRP;
-	if (access & KDBUS_MAKE_ACCESS_WORLD)
-		node->mode |= S_IROTH | S_IWOTH;
-
-	ret = kdbus_node_link(node, &domain->node, "control");
-	if (ret < 0)
-		goto exit_free;
-
-	return node;
-
-exit_free:
-	kdbus_node_drain(node);
-	kdbus_node_unref(node);
-	return ERR_PTR(ret);
-}
-
-static void kdbus_domain_free(struct kdbus_node *node)
-{
-	struct kdbus_domain *domain =
-		container_of(node, struct kdbus_domain, node);
-
-	put_user_ns(domain->user_namespace);
-	ida_destroy(&domain->user_ida);
-	idr_destroy(&domain->user_idr);
-	kfree(domain);
-}
-
-/**
- * kdbus_domain_new() - create a new domain
- * @access:		The access mode for this node (KDBUS_MAKE_ACCESS_*)
- *
- * Return: a new kdbus_domain on success, ERR_PTR on failure
- */
-struct kdbus_domain *kdbus_domain_new(unsigned int access)
-{
-	struct kdbus_domain *d;
-	int ret;
-
-	d = kzalloc(sizeof(*d), GFP_KERNEL);
-	if (!d)
-		return ERR_PTR(-ENOMEM);
-
-	kdbus_node_init(&d->node, KDBUS_NODE_DOMAIN);
-
-	d->node.free_cb = kdbus_domain_free;
-	d->node.mode = S_IRUSR | S_IXUSR;
-	if (access & (KDBUS_MAKE_ACCESS_GROUP | KDBUS_MAKE_ACCESS_WORLD))
-		d->node.mode |= S_IRGRP | S_IXGRP;
-	if (access & KDBUS_MAKE_ACCESS_WORLD)
-		d->node.mode |= S_IROTH | S_IXOTH;
-
-	mutex_init(&d->lock);
-	idr_init(&d->user_idr);
-	ida_init(&d->user_ida);
-
-	/* Pin user namespace so we can guarantee domain-unique bus * names. */
-	d->user_namespace = get_user_ns(current_user_ns());
-
-	ret = kdbus_node_link(&d->node, NULL, NULL);
-	if (ret < 0)
-		goto exit_unref;
-
-	return d;
-
-exit_unref:
-	kdbus_node_drain(&d->node);
-	kdbus_node_unref(&d->node);
-	return ERR_PTR(ret);
-}
-
-/**
- * kdbus_domain_ref() - take a domain reference
- * @domain:		Domain
- *
- * Return: the domain itself
- */
-struct kdbus_domain *kdbus_domain_ref(struct kdbus_domain *domain)
-{
-	if (domain)
-		kdbus_node_ref(&domain->node);
-	return domain;
-}
-
-/**
- * kdbus_domain_unref() - drop a domain reference
- * @domain:		Domain
- *
- * When the last reference is dropped, the domain internal structure
- * is freed.
- *
- * Return: NULL
- */
-struct kdbus_domain *kdbus_domain_unref(struct kdbus_domain *domain)
-{
-	if (domain)
-		kdbus_node_unref(&domain->node);
-	return NULL;
-}
-
-/**
- * kdbus_domain_populate() - populate static domain nodes
- * @domain:	domain to populate
- * @access:	KDBUS_MAKE_ACCESS_* access restrictions for new nodes
- *
- * Allocate and activate static sub-nodes of the given domain. This will fail if
- * you call it on a non-active node or if the domain was already populated.
- *
- * Return: 0 on success, negative error code on failure.
- */
-int kdbus_domain_populate(struct kdbus_domain *domain, unsigned int access)
-{
-	struct kdbus_node *control;
-
-	/*
-	 * Create a control-node for this domain. We drop our own reference
-	 * immediately, effectively causing the node to be deactivated and
-	 * released when the parent domain is.
-	 */
-	control = kdbus_domain_control_new(domain, access);
-	if (IS_ERR(control))
-		return PTR_ERR(control);
-
-	kdbus_node_activate(control);
-	kdbus_node_unref(control);
-	return 0;
-}
-
-/**
- * kdbus_user_lookup() - lookup a kdbus_user object
- * @domain:		domain of the user
- * @uid:		uid of the user; INVALID_UID for an anon user
- *
- * Lookup the kdbus user accounting object for the given domain. If INVALID_UID
- * is passed, a new anonymous user is created which is private to the caller.
- *
- * Return: The user object is returned, ERR_PTR on failure.
- */
-struct kdbus_user *kdbus_user_lookup(struct kdbus_domain *domain, kuid_t uid)
-{
-	struct kdbus_user *u = NULL, *old = NULL;
-	int ret;
-
-	mutex_lock(&domain->lock);
-
-	if (uid_valid(uid)) {
-		old = idr_find(&domain->user_idr, __kuid_val(uid));
-		/*
-		 * If the object is about to be destroyed, ignore it and
-		 * replace the slot in the IDR later on.
-		 */
-		if (old && kref_get_unless_zero(&old->kref)) {
-			mutex_unlock(&domain->lock);
-			return old;
-		}
-	}
-
-	u = kzalloc(sizeof(*u), GFP_KERNEL);
-	if (!u) {
-		ret = -ENOMEM;
-		goto exit;
-	}
-
-	kref_init(&u->kref);
-	u->domain = kdbus_domain_ref(domain);
-	u->uid = uid;
-	atomic_set(&u->buses, 0);
-	atomic_set(&u->connections, 0);
-
-	if (uid_valid(uid)) {
-		if (old) {
-			idr_replace(&domain->user_idr, u, __kuid_val(uid));
-			old->uid = INVALID_UID; /* mark old as removed */
-		} else {
-			ret = idr_alloc(&domain->user_idr, u, __kuid_val(uid),
-					__kuid_val(uid) + 1, GFP_KERNEL);
-			if (ret < 0)
-				goto exit;
-		}
-	}
-
-	/*
-	 * Allocate the smallest possible index for this user; used
-	 * in arrays for accounting user quota in receiver queues.
-	 */
-	ret = ida_simple_get(&domain->user_ida, 1, 0, GFP_KERNEL);
-	if (ret < 0)
-		goto exit;
-
-	u->id = ret;
-	mutex_unlock(&domain->lock);
-	return u;
-
-exit:
-	if (u) {
-		if (uid_valid(u->uid))
-			idr_remove(&domain->user_idr, __kuid_val(u->uid));
-		kdbus_domain_unref(u->domain);
-		kfree(u);
-	}
-	mutex_unlock(&domain->lock);
-	return ERR_PTR(ret);
-}
-
-static void __kdbus_user_free(struct kref *kref)
-{
-	struct kdbus_user *user = container_of(kref, struct kdbus_user, kref);
-
-	WARN_ON(atomic_read(&user->buses) > 0);
-	WARN_ON(atomic_read(&user->connections) > 0);
-
-	mutex_lock(&user->domain->lock);
-	ida_simple_remove(&user->domain->user_ida, user->id);
-	if (uid_valid(user->uid))
-		idr_remove(&user->domain->user_idr, __kuid_val(user->uid));
-	mutex_unlock(&user->domain->lock);
-
-	kdbus_domain_unref(user->domain);
-	kfree(user);
-}
-
-/**
- * kdbus_user_ref() - take a user reference
- * @u:		User
- *
- * Return: @u is returned
- */
-struct kdbus_user *kdbus_user_ref(struct kdbus_user *u)
-{
-	if (u)
-		kref_get(&u->kref);
-	return u;
-}
-
-/**
- * kdbus_user_unref() - drop a user reference
- * @u:		User
- *
- * Return: NULL
- */
-struct kdbus_user *kdbus_user_unref(struct kdbus_user *u)
-{
-	if (u)
-		kref_put(&u->kref, __kdbus_user_free);
-	return NULL;
-}