• Eric Biggers's avatar
    fscrypt: compute max_lblk_bits from s_maxbytes and block size · f0904e8b
    Eric Biggers authored
    For a given filesystem, the number of bits used by the maximum file
    logical block number is computable from the maximum file size and the
    block size.  These values are always present in struct super_block.
    Therefore, compute it this way instead of using the value from
    fscrypt_operations::get_ino_and_lblk_bits.  Since filesystems always
    have to set the super_block fields anyway, this avoids having to provide
    this information redundantly via fscrypt_operations.
    
    This change is in preparation for adding support for sub-block data
    units.  For that, the value that is needed will become "the maximum file
    data unit index".  A hardcoded value won't suffice for that; it will
    need to be computed anyway.
    
    Link: https://lore.kernel.org/r/20230925055451.59499-4-ebiggers@kernel.orgSigned-off-by: default avatarEric Biggers <ebiggers@google.com>
    f0904e8b
inline_crypt.c 15.1 KB