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-rw-r--r--drivers/md/Kconfig69
1 files changed, 48 insertions, 21 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 3834332f4963..d6d5ab23c088 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -38,9 +38,9 @@ config MD_AUTODETECT
default y
---help---
If you say Y here, then the kernel will try to autodetect raid
- arrays as part of its boot process.
+ arrays as part of its boot process.
- If you don't use raid and say Y, this autodetection can cause
+ If you don't use raid and say Y, this autodetection can cause
a several-second delay in the boot time due to various
synchronisation steps that are part of this step.
@@ -271,6 +271,7 @@ config DM_CRYPT
depends on BLK_DEV_DM
select CRYPTO
select CRYPTO_CBC
+ select CRYPTO_ESSIV
---help---
This device-mapper target allows you to create a device that
transparently encrypts the data on it. You'll need to activate
@@ -289,7 +290,7 @@ config DM_SNAPSHOT
depends on BLK_DEV_DM
select DM_BUFIO
---help---
- Allow volume managers to take writable snapshots of a device.
+ Allow volume managers to take writable snapshots of a device.
config DM_THIN_PROVISIONING
tristate "Thin provisioning target"
@@ -297,7 +298,7 @@ config DM_THIN_PROVISIONING
select DM_PERSISTENT_DATA
select DM_BIO_PRISON
---help---
- Provides thin provisioning and snapshots that share a data store.
+ Provides thin provisioning and snapshots that share a data store.
config DM_CACHE
tristate "Cache target (EXPERIMENTAL)"
@@ -306,23 +307,23 @@ config DM_CACHE
select DM_PERSISTENT_DATA
select DM_BIO_PRISON
---help---
- dm-cache attempts to improve performance of a block device by
- moving frequently used data to a smaller, higher performance
- device. Different 'policy' plugins can be used to change the
- algorithms used to select which blocks are promoted, demoted,
- cleaned etc. It supports writeback and writethrough modes.
+ dm-cache attempts to improve performance of a block device by
+ moving frequently used data to a smaller, higher performance
+ device. Different 'policy' plugins can be used to change the
+ algorithms used to select which blocks are promoted, demoted,
+ cleaned etc. It supports writeback and writethrough modes.
config DM_CACHE_SMQ
tristate "Stochastic MQ Cache Policy (EXPERIMENTAL)"
depends on DM_CACHE
default y
---help---
- A cache policy that uses a multiqueue ordered by recent hits
- to select which blocks should be promoted and demoted.
- This is meant to be a general purpose policy. It prioritises
- reads over writes. This SMQ policy (vs MQ) offers the promise
- of less memory utilization, improved performance and increased
- adaptability in the face of changing workloads.
+ A cache policy that uses a multiqueue ordered by recent hits
+ to select which blocks should be promoted and demoted.
+ This is meant to be a general purpose policy. It prioritises
+ reads over writes. This SMQ policy (vs MQ) offers the promise
+ of less memory utilization, improved performance and increased
+ adaptability in the face of changing workloads.
config DM_WRITECACHE
tristate "Writecache target"
@@ -342,16 +343,30 @@ config DM_ERA
select DM_PERSISTENT_DATA
select DM_BIO_PRISON
---help---
- dm-era tracks which parts of a block device are written to
- over time. Useful for maintaining cache coherency when using
- vendor snapshots.
+ dm-era tracks which parts of a block device are written to
+ over time. Useful for maintaining cache coherency when using
+ vendor snapshots.
+
+config DM_CLONE
+ tristate "Clone target (EXPERIMENTAL)"
+ depends on BLK_DEV_DM
+ default n
+ select DM_PERSISTENT_DATA
+ ---help---
+ dm-clone produces a one-to-one copy of an existing, read-only source
+ device into a writable destination device. The cloned device is
+ visible/mountable immediately and the copy of the source device to the
+ destination device happens in the background, in parallel with user
+ I/O.
+
+ If unsure, say N.
config DM_MIRROR
tristate "Mirror target"
depends on BLK_DEV_DM
---help---
- Allow volume managers to mirror logical volumes, also
- needed for live data migration tools such as 'pvmove'.
+ Allow volume managers to mirror logical volumes, also
+ needed for live data migration tools such as 'pvmove'.
config DM_LOG_USERSPACE
tristate "Mirror userspace logging"
@@ -468,7 +483,7 @@ config DM_FLAKEY
tristate "Flakey target"
depends on BLK_DEV_DM
---help---
- A target that intermittently fails I/O for debugging purposes.
+ A target that intermittently fails I/O for debugging purposes.
config DM_VERITY
tristate "Verity target support"
@@ -490,6 +505,18 @@ config DM_VERITY
If unsure, say N.
+config DM_VERITY_VERIFY_ROOTHASH_SIG
+ def_bool n
+ bool "Verity data device root hash signature verification support"
+ depends on DM_VERITY
+ select SYSTEM_DATA_VERIFICATION
+ help
+ Add ability for dm-verity device to be validated if the
+ pre-generated tree of cryptographic checksums passed has a pkcs#7
+ signature file that can validate the roothash of the tree.
+
+ If unsure, say N.
+
config DM_VERITY_FEC
bool "Verity forward error correction support"
depends on DM_VERITY
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