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fscrypt: move fscrypt_valid_enc_modes() to policy.c

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fscrypt_valid_enc_modes() is only used by policy.c, so move it to there.

Also adjust the order of the checks to be more natural, matching the
numerical order of the constants and also keeping AES-256 (the
recommended default) first in the list.

No change in behavior.

Link: https://lore.kernel.org/r/20191209211829.239800-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Eric Biggers
2019-12-09 13:18:28 -08:00
parent 85af90e57c
commit ef5b18b00b
2 changed files with 17 additions and 18 deletions
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18
fs/crypto/fscrypt_private.h
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@@ -206,24 +206,6 @@ typedef enum {
FS_ENCRYPT,
} fscrypt_direction_t;
static inline bool fscrypt_valid_enc_modes(u32 contents_mode,
u32 filenames_mode)
{
if (contents_mode == FSCRYPT_MODE_AES_128_CBC &&
filenames_mode == FSCRYPT_MODE_AES_128_CTS)
return true;
if (contents_mode == FSCRYPT_MODE_AES_256_XTS &&
filenames_mode == FSCRYPT_MODE_AES_256_CTS)
return true;
if (contents_mode == FSCRYPT_MODE_ADIANTUM &&
filenames_mode == FSCRYPT_MODE_ADIANTUM)
return true;
return false;
}
/* crypto.c */
extern struct kmem_cache *fscrypt_info_cachep;
extern int fscrypt_initialize(unsigned int cop_flags);