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@@ -140,6 +140,73 @@ config EXT3_FS_SECURITY
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If you are not using a security module that requires using
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extended attributes for file security labels, say N.
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+config EXT4DEV_FS
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+ tristate "Ext4dev/ext4 extended fs support development (EXPERIMENTAL)"
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+ depends on EXPERIMENTAL
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+ select JBD
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+ help
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+ Ext4dev is a predecessor filesystem of the next generation
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+ extended fs ext4, based on ext3 filesystem code. It will be
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+ renamed ext4 fs later, once ext4dev is mature and stabilized.
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+
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+ Unlike the change from ext2 filesystem to ext3 filesystem,
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+ the on-disk format of ext4dev is not the same as ext3 any more:
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+ it is based on extent maps and it supports 48-bit physical block
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+ numbers. These combined on-disk format changes will allow
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+ ext4dev/ext4 to handle more than 16 TB filesystem volumes --
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+ a hard limit that ext3 cannot overcome without changing the
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+ on-disk format.
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+
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+ Other than extent maps and 48-bit block numbers, ext4dev also is
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+ likely to have other new features such as persistent preallocation,
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+ high resolution time stamps, and larger file support etc. These
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+ features will be added to ext4dev gradually.
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+
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+ To compile this file system support as a module, choose M here. The
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+ module will be called ext4dev. Be aware, however, that the filesystem
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+ of your root partition (the one containing the directory /) cannot
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+ be compiled as a module, and so this could be dangerous.
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+
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+ If unsure, say N.
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+
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+config EXT4DEV_FS_XATTR
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+ bool "Ext4dev extended attributes"
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+ depends on EXT4DEV_FS
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+ default y
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+ help
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+ Extended attributes are name:value pairs associated with inodes by
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+ the kernel or by users (see the attr(5) manual page, or visit
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+ <http://acl.bestbits.at/> for details).
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+
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+ If unsure, say N.
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+
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+ You need this for POSIX ACL support on ext4dev/ext4.
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+
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+config EXT4DEV_FS_POSIX_ACL
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+ bool "Ext4dev POSIX Access Control Lists"
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+ depends on EXT4DEV_FS_XATTR
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+ select FS_POSIX_ACL
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+ help
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+ POSIX Access Control Lists (ACLs) support permissions for users and
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+ groups beyond the owner/group/world scheme.
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+
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+ To learn more about Access Control Lists, visit the POSIX ACLs for
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+ Linux website <http://acl.bestbits.at/>.
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+
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+ If you don't know what Access Control Lists are, say N
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+
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+config EXT4DEV_FS_SECURITY
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+ bool "Ext4dev Security Labels"
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+ depends on EXT4DEV_FS_XATTR
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+ help
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+ Security labels support alternative access control models
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+ implemented by security modules like SELinux. This option
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+ enables an extended attribute handler for file security
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+ labels in the ext4dev/ext4 filesystem.
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+
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+ If you are not using a security module that requires using
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+ extended attributes for file security labels, say N.
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+
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config JBD
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tristate
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help
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@@ -173,11 +240,11 @@ config JBD_DEBUG
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"echo 0 > /proc/sys/fs/jbd-debug".
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config FS_MBCACHE
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-# Meta block cache for Extended Attributes (ext2/ext3)
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+# Meta block cache for Extended Attributes (ext2/ext3/ext4)
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tristate
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- depends on EXT2_FS_XATTR || EXT3_FS_XATTR
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- default y if EXT2_FS=y || EXT3_FS=y
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- default m if EXT2_FS=m || EXT3_FS=m
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+ depends on EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4DEV_FS_XATTR
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+ default y if EXT2_FS=y || EXT3_FS=y || EXT4DEV_FS=y
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+ default m if EXT2_FS=m || EXT3_FS=m || EXT4DEV_FS=m
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config REISERFS_FS
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tristate "Reiserfs support"
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Mingming Cao