diff options
Diffstat (limited to 'ipc/kdbus/connection.h')
| -rw-r--r-- | ipc/kdbus/connection.h | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/ipc/kdbus/connection.h b/ipc/kdbus/connection.h deleted file mode 100644 index 1ad082014..000000000 --- a/ipc/kdbus/connection.h +++ /dev/null @@ -1,260 +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 - * - * 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_CONNECTION_H -#define __KDBUS_CONNECTION_H - -#include <linux/atomic.h> -#include <linux/kref.h> -#include <linux/lockdep.h> -#include <linux/path.h> - -#include "limits.h" -#include "metadata.h" -#include "pool.h" -#include "queue.h" -#include "util.h" - -#define KDBUS_HELLO_SPECIAL_CONN (KDBUS_HELLO_ACTIVATOR | \ - KDBUS_HELLO_POLICY_HOLDER | \ - KDBUS_HELLO_MONITOR) - -struct kdbus_name_entry; -struct kdbus_quota; -struct kdbus_staging; - -/** - * struct kdbus_conn - connection to a bus - * @kref: Reference count - * @active: Active references to the connection - * @id: Connection ID - * @flags: KDBUS_HELLO_* flags - * @attach_flags_send: KDBUS_ATTACH_* flags for sending - * @attach_flags_recv: KDBUS_ATTACH_* flags for receiving - * @description: Human-readable connection description, used for - * debugging. This field is only set when the - * connection is created. - * @ep: The endpoint this connection belongs to - * @lock: Connection data lock - * @hentry: Entry in ID <-> connection map - * @ep_entry: Entry in endpoint - * @monitor_entry: Entry in monitor, if the connection is a monitor - * @reply_list: List of connections this connection should - * reply to - * @work: Delayed work to handle timeouts - * activator for - * @match_db: Subscription filter to broadcast messages - * @meta_proc: Process metadata of connection creator, or NULL - * @meta_fake: Faked metadata, or NULL - * @pool: The user's buffer to receive messages - * @user: Owner of the connection - * @cred: The credentials of the connection at creation time - * @pid: Pid at creation time - * @root_path: Root path at creation time - * @request_count: Number of pending requests issued by this - * connection that are waiting for replies from - * other peers - * @lost_count: Number of lost broadcast messages - * @wait: Wake up this endpoint - * @queue: The message queue associated with this connection - * @quota: Array of per-user quota indexed by user->id - * @n_quota: Number of elements in quota array - * @names_list: List of well-known names - * @name_count: Number of owned well-known names - * @privileged: Whether this connection is privileged on the domain - * @owner: Owned by the same user as the bus owner - */ -struct kdbus_conn { - struct kref kref; - atomic_t active; -#ifdef CONFIG_DEBUG_LOCK_ALLOC - struct lockdep_map dep_map; -#endif - u64 id; - u64 flags; - atomic64_t attach_flags_send; - atomic64_t attach_flags_recv; - const char *description; - struct kdbus_ep *ep; - struct mutex lock; - struct hlist_node hentry; - struct list_head ep_entry; - struct list_head monitor_entry; - struct list_head reply_list; - struct delayed_work work; - struct kdbus_match_db *match_db; - struct kdbus_meta_proc *meta_proc; - struct kdbus_meta_fake *meta_fake; - struct kdbus_pool *pool; - struct kdbus_user *user; - const struct cred *cred; - struct pid *pid; - struct path root_path; - atomic_t request_count; - atomic_t lost_count; - wait_queue_head_t wait; - struct kdbus_queue queue; - - struct kdbus_quota *quota; - unsigned int n_quota; - - /* protected by registry->rwlock */ - struct list_head names_list; - unsigned int name_count; - - bool privileged:1; - bool owner:1; -}; - -struct kdbus_conn *kdbus_conn_ref(struct kdbus_conn *conn); -struct kdbus_conn *kdbus_conn_unref(struct kdbus_conn *conn); -bool kdbus_conn_active(const struct kdbus_conn *conn); -int kdbus_conn_acquire(struct kdbus_conn *conn); -void kdbus_conn_release(struct kdbus_conn *conn); -int kdbus_conn_disconnect(struct kdbus_conn *conn, bool ensure_queue_empty); -bool kdbus_conn_has_name(struct kdbus_conn *conn, const char *name); -int kdbus_conn_quota_inc(struct kdbus_conn *c, struct kdbus_user *u, - size_t memory, size_t fds); -void kdbus_conn_quota_dec(struct kdbus_conn *c, struct kdbus_user *u, - size_t memory, size_t fds); -void kdbus_conn_lost_message(struct kdbus_conn *c); -int kdbus_conn_entry_insert(struct kdbus_conn *conn_src, - struct kdbus_conn *conn_dst, - struct kdbus_staging *staging, - struct kdbus_reply *reply, - const struct kdbus_name_entry *name); -void kdbus_conn_move_messages(struct kdbus_conn *conn_dst, - struct kdbus_conn *conn_src, - u64 name_id); - -/* policy */ -bool kdbus_conn_policy_own_name(struct kdbus_conn *conn, - const struct cred *conn_creds, - const char *name); -bool kdbus_conn_policy_talk(struct kdbus_conn *conn, - const struct cred *conn_creds, - struct kdbus_conn *to); -bool kdbus_conn_policy_see_name_unlocked(struct kdbus_conn *conn, - const struct cred *curr_creds, - const char *name); -bool kdbus_conn_policy_see_notification(struct kdbus_conn *conn, - const struct cred *curr_creds, - const struct kdbus_msg *msg); - -/* command dispatcher */ -struct kdbus_conn *kdbus_cmd_hello(struct kdbus_ep *ep, struct file *file, - void __user *argp); -int kdbus_cmd_byebye_unlocked(struct kdbus_conn *conn, void __user *argp); -int kdbus_cmd_conn_info(struct kdbus_conn *conn, void __user *argp); -int kdbus_cmd_update(struct kdbus_conn *conn, void __user *argp); -int kdbus_cmd_send(struct kdbus_conn *conn, struct file *f, void __user *argp); -int kdbus_cmd_recv(struct kdbus_conn *conn, void __user *argp); -int kdbus_cmd_free(struct kdbus_conn *conn, void __user *argp); - -/** - * kdbus_conn_is_ordinary() - Check if connection is ordinary - * @conn: The connection to check - * - * Return: Non-zero if the connection is an ordinary connection - */ -static inline int kdbus_conn_is_ordinary(const struct kdbus_conn *conn) -{ - return !(conn->flags & KDBUS_HELLO_SPECIAL_CONN); -} - -/** - * kdbus_conn_is_activator() - Check if connection is an activator - * @conn: The connection to check - * - * Return: Non-zero if the connection is an activator - */ -static inline int kdbus_conn_is_activator(const struct kdbus_conn *conn) -{ - return conn->flags & KDBUS_HELLO_ACTIVATOR; -} - -/** - * kdbus_conn_is_policy_holder() - Check if connection is a policy holder - * @conn: The connection to check - * - * Return: Non-zero if the connection is a policy holder - */ -static inline int kdbus_conn_is_policy_holder(const struct kdbus_conn *conn) -{ - return conn->flags & KDBUS_HELLO_POLICY_HOLDER; -} - -/** - * kdbus_conn_is_monitor() - Check if connection is a monitor - * @conn: The connection to check - * - * Return: Non-zero if the connection is a monitor - */ -static inline int kdbus_conn_is_monitor(const struct kdbus_conn *conn) -{ - return conn->flags & KDBUS_HELLO_MONITOR; -} - -/** - * kdbus_conn_lock2() - Lock two connections - * @a: connection A to lock or NULL - * @b: connection B to lock or NULL - * - * Lock two connections at once. As we need to have a stable locking order, we - * always lock the connection with lower memory address first. - */ -static inline void kdbus_conn_lock2(struct kdbus_conn *a, struct kdbus_conn *b) -{ - if (a < b) { - if (a) - mutex_lock(&a->lock); - if (b && b != a) - mutex_lock_nested(&b->lock, !!a); - } else { - if (b) - mutex_lock(&b->lock); - if (a && a != b) - mutex_lock_nested(&a->lock, !!b); - } -} - -/** - * kdbus_conn_unlock2() - Unlock two connections - * @a: connection A to unlock or NULL - * @b: connection B to unlock or NULL - * - * Unlock two connections at once. See kdbus_conn_lock2(). - */ -static inline void kdbus_conn_unlock2(struct kdbus_conn *a, - struct kdbus_conn *b) -{ - if (a) - mutex_unlock(&a->lock); - if (b && b != a) - mutex_unlock(&b->lock); -} - -/** - * kdbus_conn_assert_active() - lockdep assert on active lock - * @conn: connection that shall be active - * - * This verifies via lockdep that the caller holds an active reference to the - * given connection. - */ -static inline void kdbus_conn_assert_active(struct kdbus_conn *conn) -{ - lockdep_assert_held(conn); -} - -#endif |