ANDROID: Included sdcardfs source code for kernel 3.0
Only included the source code as is for kernel 3.0. Following patches
take care of porting this file system to version 3.10.
Change-Id: I09e76db77cd98a059053ba5b6fd88572a4b75b5b
Signed-off-by: Daniel Campello <campello@google.com>
diff --git a/fs/sdcardfs/multiuser.h b/fs/sdcardfs/multiuser.h
new file mode 100644
index 0000000..923ba10
--- /dev/null
+++ b/fs/sdcardfs/multiuser.h
@@ -0,0 +1,37 @@
+/*
+ * fs/sdcardfs/multiuser.h
+ *
+ * Copyright (c) 2013 Samsung Electronics Co. Ltd
+ * Authors: Daeho Jeong, Woojoong Lee, Seunghwan Hyun,
+ * Sunghwan Yun, Sungjong Seo
+ *
+ * This program has been developed as a stackable file system based on
+ * the WrapFS which written by
+ *
+ * Copyright (c) 1998-2011 Erez Zadok
+ * Copyright (c) 2009 Shrikar Archak
+ * Copyright (c) 2003-2011 Stony Brook University
+ * Copyright (c) 2003-2011 The Research Foundation of SUNY
+ *
+ * This file is dual licensed. It may be redistributed and/or modified
+ * under the terms of the Apache 2.0 License OR version 2 of the GNU
+ * General Public License.
+ */
+
+#define MULTIUSER_APP_PER_USER_RANGE 100000
+
+typedef uid_t userid_t;
+typedef uid_t appid_t;
+
+static inline userid_t multiuser_get_user_id(uid_t uid) {
+ return uid / MULTIUSER_APP_PER_USER_RANGE;
+}
+
+static inline appid_t multiuser_get_app_id(uid_t uid) {
+ return uid % MULTIUSER_APP_PER_USER_RANGE;
+}
+
+static inline uid_t multiuser_get_uid(userid_t userId, appid_t appId) {
+ return userId * MULTIUSER_APP_PER_USER_RANGE + (appId % MULTIUSER_APP_PER_USER_RANGE);
+}
+