diff options
Diffstat (limited to 'fs/crypto/fscrypt_private.h')
| -rw-r--r-- | fs/crypto/fscrypt_private.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/crypto/fscrypt_private.h b/fs/crypto/fscrypt_private.h index 2d63da48635a..4b113214b53a 100644 --- a/fs/crypto/fscrypt_private.h +++ b/fs/crypto/fscrypt_private.h @@ -296,6 +296,16 @@ union fscrypt_iv { void fscrypt_generate_iv(union fscrypt_iv *iv, u64 lblk_num, const struct fscrypt_info *ci); +/* + * Return the number of bits used by the maximum file logical block number that + * is possible on the given filesystem. + */ +static inline int +fscrypt_max_file_lblk_bits(const struct super_block *sb) +{ + return fls64(sb->s_maxbytes - 1) - sb->s_blocksize_bits; +} + /* fname.c */ bool __fscrypt_fname_encrypted_size(const union fscrypt_policy *policy, u32 orig_len, u32 max_len, |