On Fri, Oct 30, 2020 at 10:51:16PM +0900, Naohiro Aota wrote: > In the future, we may be able to implement "in-memory" fallocate() in ZONED > mode by utilizing space_info->bytes_may_use or so. > + /* Do not allow fallocate in ZONED mode */ > + if (btrfs_is_zoned(btrfs_sb(inode->i_sb))) > + return -EOPNOTSUPP; So here EOPNOTSUPP is ok. > + > /* Make sure we aren't being give some crap mode */ > if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | > FALLOC_FL_ZERO_RANGE)) > -- > 2.27.0