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BACKPORT: FROMLIST: block: blk-crypto for Inline Encryption

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We introduce blk-crypto, which manages programming keyslots for struct
bios. With blk-crypto, filesystems only need to call bio_crypt_set_ctx with
the encryption key, algorithm and data_unit_num; they don't have to worry
about getting a keyslot for each encryption context, as blk-crypto handles
that. Blk-crypto also makes it possible for layered devices like device
mapper to make use of inline encryption hardware.

Blk-crypto delegates crypto operations to inline encryption hardware when
available, and also contains a software fallback to the kernel crypto API.
For more details, refer to Documentation/block/inline-encryption.rst.

Bug: 137270441
Test: tested as series; see I26aac0ac7845a9064f28bb1421eb2522828a6dec
Change-Id: I6a98e518e5de50f1d4110441568ecd142a02e900
Signed-off-by: Satya Tangirala <satyat@google.com>
Link: https://patchwork.kernel.org/patch/11214731/
This commit is contained in:
Satya Tangirala
2019-10-24 14:44:25 -07:00
committed by Alistair Delva
parent 8fda305325
commit 392ad89e96
9 changed files with 1074 additions and 3 deletions
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2
block/Kconfig
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@@ -202,6 +202,8 @@ config BLK_SED_OPAL
config BLK_INLINE_ENCRYPTION
bool "Enable inline encryption support in block layer"
select CRYPTO
select CRYPTO_BLKCIPHER
help
Build the blk-crypto subsystem.
Enabling this lets the block layer handle encryption,