Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / ext4 / Kconfig

diff --git a/kernel/fs/ext4/Kconfig b/kernel/fs/ext4/Kconfig
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+++ b/kernel/fs/ext4/Kconfig
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+config EXT4_FS
+       tristate "The Extended 4 (ext4) filesystem"
+       select JBD2
+       select CRC16
+       select CRYPTO
+       select CRYPTO_CRC32C
+       help
+         This is the next generation of the ext3 filesystem.
+
+         Unlike the change from ext2 filesystem to ext3 filesystem,
+         the on-disk format of ext4 is not forwards compatible with
+         ext3; it is based on extent maps and it supports 48-bit
+         physical block numbers.  The ext4 filesystem also supports delayed
+         allocation, persistent preallocation, high resolution time stamps,
+         and a number of other features to improve performance and speed
+         up fsck time.  For more information, please see the web pages at
+         http://ext4.wiki.kernel.org.
+
+         The ext4 filesystem will support mounting an ext3
+         filesystem; while there will be some performance gains from
+         the delayed allocation and inode table readahead, the best
+         performance gains will require enabling ext4 features in the
+         filesystem, or formatting a new filesystem as an ext4
+         filesystem initially.
+
+         To compile this file system support as a module, choose M here. The
+         module will be called ext4.
+
+         If unsure, say N.
+
+config EXT4_USE_FOR_EXT23
+       bool "Use ext4 for ext2/ext3 file systems"
+       depends on EXT4_FS
+       depends on EXT3_FS=n || EXT2_FS=n
+       default y
+       help
+         Allow the ext4 file system driver code to be used for ext2 or
+         ext3 file system mounts.  This allows users to reduce their
+         compiled kernel size by using one file system driver for
+         ext2, ext3, and ext4 file systems.
+
+config EXT4_FS_POSIX_ACL
+       bool "Ext4 POSIX Access Control Lists"
+       depends on EXT4_FS
+       select FS_POSIX_ACL
+       help
+         POSIX Access Control Lists (ACLs) support permissions for users and
+         groups beyond the owner/group/world scheme.
+
+         To learn more about Access Control Lists, visit the POSIX ACLs for
+         Linux website <http://acl.bestbits.at/>.
+
+         If you don't know what Access Control Lists are, say N
+
+config EXT4_FS_SECURITY
+       bool "Ext4 Security Labels"
+       depends on EXT4_FS
+       help
+         Security labels support alternative access control models
+         implemented by security modules like SELinux.  This option
+         enables an extended attribute handler for file security
+         labels in the ext4 filesystem.
+
+         If you are not using a security module that requires using
+         extended attributes for file security labels, say N.
+
+config EXT4_ENCRYPTION
+       tristate "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_FS_ENCRYPTION
+       bool
+       default y
+       depends on EXT4_ENCRYPTION
+
+config EXT4_DEBUG
+       bool "EXT4 debugging support"
+       depends on EXT4_FS
+       help
+         Enables run-time debugging support for the ext4 filesystem.
+
+         If you select Y here, then you will be able to turn on debugging
+         with a command such as:
+               echo 1 > /sys/module/ext4/parameters/mballoc_debug