DIP_ADD
DIP_ADD(ip, blocks, btodb(size));
DIP_ADD(ip, blocks, btodb(nsize - osize));
DIP_ADD(ip, blocks, btodb(nsize - osize));
DIP_ADD(oip, blocks, -blocksreleased);
DIP_ADD(ip, blocks, -btodb(fs->fs_bsize));
DIP_ADD(ip, blocks, -btodb(fs->fs_bsize));
DIP_ADD(ip, blocks, btodb(size));
DIP_ADD(ip, blocks, size / DEV_BSIZE);