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authorEric Biggers <ebiggers@google.com>2022-12-23 12:36:30 -0800
committerEric Biggers <ebiggers@google.com>2023-01-09 19:05:56 -0800
commit579a12f78d889339488175cd9f353dba2bb8d047 (patch)
treeb5ab4ec28788a73a4be44534f080f2889bac9a06 /fs/verity/open.c
parent9098f36b739db9a77d24b7c302dcb9d3fe987308 (diff)
fsverity: store log2(digest_size) precomputed
Add log_digestsize to struct merkle_tree_params so that it can be used in verify.c. Also save memory by using u8 for all the log_* fields. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Andrey Albershteyn <aalbersh@redhat.com> Tested-by: Ojaswin Mujoo <ojaswin@linux.ibm.com> Link: https://lore.kernel.org/r/20221223203638.41293-4-ebiggers@kernel.org
Diffstat (limited to 'fs/verity/open.c')
-rw-r--r--fs/verity/open.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/verity/open.c b/fs/verity/open.c
index e356eefb54d7..ca8de73e5a0b 100644
--- a/fs/verity/open.c
+++ b/fs/verity/open.c
@@ -76,7 +76,8 @@ int fsverity_init_merkle_tree_params(struct merkle_tree_params *params,
err = -EINVAL;
goto out_err;
}
- params->log_arity = params->log_blocksize - ilog2(params->digest_size);
+ params->log_digestsize = ilog2(params->digest_size);
+ params->log_arity = log_blocksize - params->log_digestsize;
params->hashes_per_block = 1 << params->log_arity;
/*