diff options
| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2017-02-19 15:46:07 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-04-24 22:37:04 +0300 |
| commit | d1ac3ff008fb9a48f91fc15920b4c8db24c0f03e (patch) | |
| tree | 564a6181d22925a9dfc25eb7c69af735a0f6c399 /drivers/md/dm-verity-fec.c | |
| parent | a1b89132dc4f61071bdeaab92ea958e0953380a1 (diff) | |
| download | linux-d1ac3ff008fb9a48f91fc15920b4c8db24c0f03e.tar.xz | |
dm verity: switch to using asynchronous hash crypto API
Use of the synchronous digest API limits dm-verity to using pure
CPU based algorithm providers and rules out the use of off CPU
algorithm providers which are normally asynchronous by nature,
potentially freeing CPU cycles.
This can reduce performance per Watt in situations such as during
boot time when a lot of concurrent file accesses are made to the
protected volume.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
CC: Eric Biggers <ebiggers3@gmail.com>
CC: Ondrej Mosnáček <omosnacek+linux-crypto@gmail.com>
Tested-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-verity-fec.c')
| -rw-r--r-- | drivers/md/dm-verity-fec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/dm-verity-fec.c b/drivers/md/dm-verity-fec.c index 0f0eb8a3d922..dab98fee0754 100644 --- a/drivers/md/dm-verity-fec.c +++ b/drivers/md/dm-verity-fec.c @@ -188,7 +188,7 @@ error: static int fec_is_erasure(struct dm_verity *v, struct dm_verity_io *io, u8 *want_digest, u8 *data) { - if (unlikely(verity_hash(v, verity_io_hash_desc(v, io), + if (unlikely(verity_hash(v, verity_io_hash_req(v, io), data, 1 << v->data_dev_block_bits, verity_io_real_digest(v, io)))) return 0; @@ -397,7 +397,7 @@ static int fec_decode_rsb(struct dm_verity *v, struct dm_verity_io *io, } /* Always re-validate the corrected block against the expected hash */ - r = verity_hash(v, verity_io_hash_desc(v, io), fio->output, + r = verity_hash(v, verity_io_hash_req(v, io), fio->output, 1 << v->data_dev_block_bits, verity_io_real_digest(v, io)); if (unlikely(r < 0)) |