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authorMikulas Patocka <mpatocka@redhat.com>2012-03-28 18:43:38 +0100
committerAlasdair G Kergon <agk@redhat.com>2012-03-28 18:43:38 +0100
commita4ffc152198efba2ed9e6eac0eb97f17bfebce85 (patch)
tree1901c86e3f4dbfcc3bd753888951a51430f0cde2 /drivers/md/Kconfig
parenta66cc28f53a7e9679dedb2bc66ddb0e0c6bdd0ee (diff)
downloadop-kernel-dev-a4ffc152198efba2ed9e6eac0eb97f17bfebce85.zip
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dm: add verity target
This device-mapper target creates a read-only device that transparently validates the data on one underlying device against a pre-generated tree of cryptographic checksums stored on a second device. Two checksum device formats are supported: version 0 which is already shipping in Chromium OS and version 1 which incorporates some improvements. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mandeep Singh Baines <msb@chromium.org> Signed-off-by: Will Drewry <wad@chromium.org> Signed-off-by: Elly Jones <ellyjones@chromium.org> Cc: Milan Broz <mbroz@redhat.com> Cc: Olof Johansson <olofj@chromium.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/Kconfig')
-rw-r--r--drivers/md/Kconfig20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 7100007..10f122a 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -370,4 +370,24 @@ config DM_FLAKEY
---help---
A target that intermittently fails I/O for debugging purposes.
+config DM_VERITY
+ tristate "Verity target support (EXPERIMENTAL)"
+ depends on BLK_DEV_DM && EXPERIMENTAL
+ select CRYPTO
+ select CRYPTO_HASH
+ select DM_BUFIO
+ ---help---
+ This device-mapper target creates a read-only device that
+ transparently validates the data on one underlying device against
+ a pre-generated tree of cryptographic checksums stored on a second
+ device.
+
+ You'll need to activate the digests you're going to use in the
+ cryptoapi configuration.
+
+ To compile this code as a module, choose M here: the module will
+ be called dm-verity.
+
+ If unsure, say N.
+
endif # MD
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