84a1b7d3d3
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>
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
/*
|
|
* 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);
|
|
}
|
|
|