[PATCH] dm-crypt

From: Christophe Saout <christophe@saout.de>

Adds a crypto module for device-mapper.  The intent here is to remove
cryptoloop ASAP, to pull the remapping gunk out of the loops driver and to
migrate people onto dm-crypt.  It is on-disk compatible with existing
cryptolop installations.

See http://www.saout.de/misc/dm-crypt/ for usage details.

drivers/md/Kconfig

@@ -170,5 +170,23 @@ config DM_IOCTL_V4
 	  Recent tools use a new version of the ioctl interface, only
           select this option if you intend using such tools.
 
+config DM_CRYPT
+	tristate "Crypt target support"
+	depends on BLK_DEV_DM && EXPERIMENTAL
+	select CRYPTO
+	---help---
+	  This device-mapper target allows you to create a device that
+	  transparently encrypts the data on it. You'll need to activate
+	  the ciphers you're going to use in the cryptoapi configuration.
+
+	  Information on how to use dm-crypt can be found on
+
+	  http://www.saout.de/misc/dm-crypt/
+
+	  To compile this code as a module, choose M here: the module will
+	  be called dm-crypt.
+
+	  If unsure, say N.
+
 endmenu
 

drivers/md/Makefile

@@ -23,6 +23,7 @@ obj-$(CONFIG_MD_RAID6)		+= raid6.o xor.o
 obj-$(CONFIG_MD_MULTIPATH)	+= multipath.o
 obj-$(CONFIG_BLK_DEV_MD)	+= md.o
 obj-$(CONFIG_BLK_DEV_DM)	+= dm-mod.o
+obj-$(CONFIG_DM_CRYPT)		+= dm-crypt.o
 
 quiet_cmd_unroll = UNROLL  $@
       cmd_unroll = $(PERL) $(srctree)/$(src)/unroll.pl $(UNROLL) \