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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /ipc/kdbus/main.c
Initial import
Diffstat (limited to 'ipc/kdbus/main.c')
-rw-r--r--ipc/kdbus/main.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/ipc/kdbus/main.c b/ipc/kdbus/main.c
new file mode 100644
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+++ 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");