diff options
Diffstat (limited to 'ipc/kdbus/main.c')
| -rw-r--r-- | ipc/kdbus/main.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/ipc/kdbus/main.c b/ipc/kdbus/main.c new file mode 100644 index 000000000..1ad4dc8da --- /dev/null +++ b/ipc/kdbus/main.c @@ -0,0 +1,114 @@ +/* + * 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 + * + * 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. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/module.h> + +#include "util.h" +#include "fs.h" +#include "handle.h" +#include "metadata.h" +#include "node.h" + +/* + * This is a simplified outline of the internal kdbus object relations, for + * those interested in the inner life of the driver implementation. + * + * From a mount point's (domain's) perspective: + * + * struct kdbus_domain + * |» struct kdbus_user *user (many, owned) + * '» struct kdbus_node node (embedded) + * |» struct kdbus_node children (many, referenced) + * |» struct kdbus_node *parent (pinned) + * '» struct kdbus_bus (many, pinned) + * |» struct kdbus_node node (embedded) + * '» struct kdbus_ep (many, pinned) + * |» struct kdbus_node node (embedded) + * |» struct kdbus_bus *bus (pinned) + * |» struct kdbus_conn conn_list (many, pinned) + * | |» struct kdbus_ep *ep (pinned) + * | |» struct kdbus_name_entry *activator_of (owned) + * | |» struct kdbus_match_db *match_db (owned) + * | |» struct kdbus_meta *meta (owned) + * | |» struct kdbus_match_db *match_db (owned) + * | | '» struct kdbus_match_entry (many, owned) + * | | + * | |» struct kdbus_pool *pool (owned) + * | | '» struct kdbus_pool_slice *slices (many, owned) + * | | '» struct kdbus_pool *pool (pinned) + * | | + * | |» struct kdbus_user *user (pinned) + * | `» struct kdbus_queue_entry entries (many, embedded) + * | |» struct kdbus_pool_slice *slice (pinned) + * | |» struct kdbus_conn_reply *reply (owned) + * | '» struct kdbus_user *user (pinned) + * | + * '» struct kdbus_user *user (pinned) + * '» struct kdbus_policy_db policy_db (embedded) + * |» struct kdbus_policy_db_entry (many, owned) + * | |» struct kdbus_conn (pinned) + * | '» struct kdbus_ep (pinned) + * | + * '» struct kdbus_policy_db_cache_entry (many, owned) + * '» struct kdbus_conn (pinned) + * + * For the life-time of a file descriptor derived from calling open() on a file + * inside the mount point: + * + * struct kdbus_handle + * |» struct kdbus_meta *meta (owned) + * |» struct kdbus_ep *ep (pinned) + * |» struct kdbus_conn *conn (owned) + * '» struct kdbus_ep *ep (owned) + */ + +/* kdbus mount-point /sys/fs/kdbus */ +static struct kobject *kdbus_dir; + +static int __init kdbus_init(void) +{ + int ret; + + kdbus_dir = kobject_create_and_add(KBUILD_MODNAME, fs_kobj); + if (!kdbus_dir) + return -ENOMEM; + + ret = kdbus_fs_init(); + if (ret < 0) { + pr_err("cannot register filesystem: %d\n", ret); + goto exit_dir; + } + + pr_info("initialized\n"); + return 0; + +exit_dir: + kobject_put(kdbus_dir); + return ret; +} + +static void __exit kdbus_exit(void) +{ + kdbus_fs_exit(); + kobject_put(kdbus_dir); + ida_destroy(&kdbus_node_ida); +} + +module_init(kdbus_init); +module_exit(kdbus_exit); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("D-Bus, powerful, easy to use interprocess communication"); +MODULE_ALIAS_FS(KBUILD_MODNAME "fs"); |