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authorEric Biggers <ebiggers@google.com>2017-03-31 08:18:48 +0300
committerMike Snitzer <snitzer@redhat.com>2017-04-25 23:12:03 +0300
commit86f917adea2dc0ef440a248601e48154dc48e6d0 (patch)
treed23ebff0683d9481af9fe692876bed88e81d8fd7 /drivers/md
parentd1ac3ff008fb9a48f91fc15920b4c8db24c0f03e (diff)
downloadlinux-86f917adea2dc0ef440a248601e48154dc48e6d0.tar.xz
dm crypt: remove obsolete references to per-CPU state
dm-crypt used to use separate crypto transforms for each CPU, but this is no longer the case. To avoid confusion, fix up obsolete comments and rename setup_essiv_cpu(). Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-crypt.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 64c5022449ee..e2de5715d528 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -225,7 +225,7 @@ static struct scatterlist *crypt_get_sg_data(struct crypt_config *cc,
struct scatterlist *sg);
/*
- * Use this to access cipher attributes that are the same for each CPU.
+ * Use this to access cipher attributes that are independent of the key.
*/
static struct crypto_skcipher *any_tfm(struct crypt_config *cc)
{
@@ -349,10 +349,11 @@ static int crypt_iv_essiv_wipe(struct crypt_config *cc)
return err;
}
-/* Set up per cpu cipher state */
-static struct crypto_cipher *setup_essiv_cpu(struct crypt_config *cc,
- struct dm_target *ti,
- u8 *salt, unsigned saltsize)
+/* Allocate the cipher for ESSIV */
+static struct crypto_cipher *alloc_essiv_cipher(struct crypt_config *cc,
+ struct dm_target *ti,
+ const u8 *salt,
+ unsigned int saltsize)
{
struct crypto_cipher *essiv_tfm;
int err;
@@ -431,9 +432,8 @@ static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
cc->iv_gen_private.essiv.salt = salt;
cc->iv_gen_private.essiv.hash_tfm = hash_tfm;
- essiv_tfm = setup_essiv_cpu(cc, ti, salt,
- crypto_ahash_digestsize(hash_tfm));
-
+ essiv_tfm = alloc_essiv_cipher(cc, ti, salt,
+ crypto_ahash_digestsize(hash_tfm));
if (IS_ERR(essiv_tfm)) {
crypt_iv_essiv_dtr(cc);
return PTR_ERR(essiv_tfm);