f2fs: support xattr security labels

This patch adds the support of security labels for f2fs, which will be used
by Linus Security Models (LSMs).

Quote from http://en.wikipedia.org/wiki/Linux_Security_Modules:
"Linux Security Modules (LSM) is a framework that allows the Linux kernel to
support a variety of computer security models while avoiding favoritism toward
any single security implementation. The framework is licensed under the terms of
the GNU General Public License and is standard part of the Linux kernel since
Linux 2.6. AppArmor, SELinux, Smack and TOMOYO Linux are the currently accepted
modules in the official kernel.".

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig
index fd27e7e6326e..e06e0995e00f 100644
--- a/fs/f2fs/Kconfig
+++ b/fs/f2fs/Kconfig
@@ -51,3 +51,15 @@ config F2FS_FS_POSIX_ACL
           Linux website <http://acl.bestbits.at/>.
 
           If you don't know what Access Control Lists are, say N
+
+config F2FS_FS_SECURITY
+        bool "F2FS Security Labels"
+        depends on F2FS_FS_XATTR
+        help
+          Security labels provide an access control facility to support Linux
+          Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
+          Linux. This option enables an extended attribute handler for file
+          security labels in the f2fs filesystem, so that it requires enabling
+          the extended attribute support in advance.
+
+          If you are not using a security module, say N.