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FROMLIST: block: blk-crypto for Inline Encryption

Browse source 
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 Ie1b77f7615d6a7a60fdc9105c7ab2200d17636a8
Change-Id: I7df59fef0c1e90043b1899c5a95973e23afac0c5
Signed-off-by: Satya Tangirala <[email protected]>
Link: https://patchwork.kernel.org/patch/11214731/
This commit is contained in:
Satya Tangirala 2019-10-24 14:44:25 -07:00 • committed by Paul Lawrence
commit 600e29fce0
10 changed files with 1076 additions and 3 deletions
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5
block/bio.c
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@ -17,6 +17,7 @@
#include <linux/cgroup.h>
#include <linux/blk-cgroup.h>
#include <linux/highmem.h>
#include <linux/blk-crypto.h>
#include <trace/events/block.h>
#include "blk.h"
@ -1788,6 +1789,10 @@ void bio_endio(struct bio *bio)
again:
if (!bio_remaining_done(bio))
return;
if (!blk_crypto_endio(bio))
return;
if (!bio_integrity_endio(bio))
return;