ext4 crypto: add ext4 encryption Kconfig

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

diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig
index efea5d5..18228c2 100644 (file)
--- 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