ext4 crypto: add ext4 encryption Kconfig

Signed-off-by: Michael Halcrow <mhalcrow@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

1 files changed, 17 insertions, 0 deletions

diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig
index efea5d5c44ce..18228c201f7f 100644
--- a/fs/ext4/Kconfig
+++ b/fs/ext4/Kconfig
@@ -64,6 +64,23 @@ config EXT4_FS_SECURITY
           If you are not using a security module that requires using
           extended attributes for file security labels, say N.
 
+config EXT4_FS_ENCRYPTION
+        bool "Ext4 Encryption"
+        depends on EXT4_FS
+        select CRYPTO_AES
+        select CRYPTO_CBC
+        select CRYPTO_ECB
+        select CRYPTO_XTS
+        select CRYPTO_CTS
+        select CRYPTO_SHA256
+        select KEYS
+        select ENCRYPTED_KEYS
+        help
+          Enable encryption of ext4 files and directories.  This
+          feature is similar to ecryptfs, but it is more memory
+          efficient since it avoids caching the encrypted and
+          decrypted pages in the page cache.
+
 config EXT4_DEBUG
         bool "EXT4 debugging support"
         depends on EXT4_FS