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Diffstat (limited to 'ipc/kdbus/domain.h')
| -rw-r--r-- | ipc/kdbus/domain.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/ipc/kdbus/domain.h b/ipc/kdbus/domain.h new file mode 100644 index 000000000..447a2bd4d --- /dev/null +++ b/ipc/kdbus/domain.h @@ -0,0 +1,77 @@ +/* + * 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. + */ + +#ifndef __KDBUS_DOMAIN_H +#define __KDBUS_DOMAIN_H + +#include <linux/fs.h> +#include <linux/idr.h> +#include <linux/kref.h> +#include <linux/user_namespace.h> + +#include "node.h" + +/** + * struct kdbus_domain - domain for buses + * @node: Underlying API node + * @lock: Domain data lock + * @last_id: Last used object id + * @user_idr: Set of all users indexed by UID + * @user_ida: Set of all users to compute small indices + * @user_namespace: User namespace, pinned at creation time + * @dentry: Root dentry of VFS mount (don't use outside of kdbusfs) + */ +struct kdbus_domain { + struct kdbus_node node; + struct mutex lock; + atomic64_t last_id; + struct idr user_idr; + struct ida user_ida; + struct user_namespace *user_namespace; + struct dentry *dentry; +}; + +/** + * struct kdbus_user - resource accounting for users + * @kref: Reference counter + * @domain: Domain of the user + * @id: Index of this user + * @uid: UID of the user + * @buses: Number of buses the user has created + * @connections: Number of connections the user has created + */ +struct kdbus_user { + struct kref kref; + struct kdbus_domain *domain; + unsigned int id; + kuid_t uid; + atomic_t buses; + atomic_t connections; +}; + +#define kdbus_domain_from_node(_node) \ + container_of((_node), struct kdbus_domain, node) + +struct kdbus_domain *kdbus_domain_new(unsigned int access); +struct kdbus_domain *kdbus_domain_ref(struct kdbus_domain *domain); +struct kdbus_domain *kdbus_domain_unref(struct kdbus_domain *domain); +int kdbus_domain_populate(struct kdbus_domain *domain, unsigned int access); + +#define KDBUS_USER_KERNEL_ID 0 /* ID 0 is reserved for kernel accounting */ + +struct kdbus_user *kdbus_user_lookup(struct kdbus_domain *domain, kuid_t uid); +struct kdbus_user *kdbus_user_ref(struct kdbus_user *u); +struct kdbus_user *kdbus_user_unref(struct kdbus_user *u); + +#endif |