logical_block_start 10912 fs/btrfs/inode.c u64 logical_block_start, physical_block_start; logical_block_start 10945 fs/btrfs/inode.c logical_block_start = em->block_start + (start - em->start); logical_block_start 10962 fs/btrfs/inode.c em = btrfs_get_chunk_map(fs_info, logical_block_start, len); logical_block_start 10989 fs/btrfs/inode.c (logical_block_start - em->start)); logical_block_start 10990 fs/btrfs/inode.c len = min(len, em->len - (logical_block_start - em->start)); logical_block_start 10994 fs/btrfs/inode.c bg = btrfs_lookup_block_group(fs_info, logical_block_start);