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| author | Sami Tolvanen <samitolvanen@google.com> | 2015-12-03 14:26:31 +0000 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2015-12-10 10:39:03 -0500 |
| commit | 0cc37c2df4fa0aa702f9662edce4b7ce12c86b7a (patch) | |
| tree | ce34d33da52e65c3907034f294af01f7dd96ad0b /drivers/md/dm-verity.h | |
| parent | a739ff3f543afbb4a041c16cd0182c8e8d366e70 (diff) | |
| download | linux-0cc37c2df4fa0aa702f9662edce4b7ce12c86b7a.tar.gz linux-0cc37c2df4fa0aa702f9662edce4b7ce12c86b7a.tar.bz2 linux-0cc37c2df4fa0aa702f9662edce4b7ce12c86b7a.zip | |
dm verity: add ignore_zero_blocks feature
If ignore_zero_blocks is enabled dm-verity will return zeroes for blocks
matching a zero hash without validating the content.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-verity.h')
| -rw-r--r-- | drivers/md/dm-verity.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm-verity.h b/drivers/md/dm-verity.h index 8e853722f6c6..fb419f422d73 100644 --- a/drivers/md/dm-verity.h +++ b/drivers/md/dm-verity.h @@ -40,6 +40,7 @@ struct dm_verity { struct crypto_shash *tfm; u8 *root_digest; /* digest of the root block */ u8 *salt; /* salt: its size is salt_size */ + u8 *zero_digest; /* digest for a zero block */ unsigned salt_size; sector_t data_start; /* data offset in 512-byte sectors */ sector_t hash_start; /* hash start in blocks */ @@ -123,6 +124,6 @@ extern int verity_hash(struct dm_verity *v, struct shash_desc *desc, const u8 *data, size_t len, u8 *digest); extern int verity_hash_for_block(struct dm_verity *v, struct dm_verity_io *io, - sector_t block, u8 *digest); + sector_t block, u8 *digest, bool *is_zero); #endif /* DM_VERITY_H */ |