EXT_PER_MALLOC
ip->i_ext_count += EXT_PER_MALLOC;
ip->i_con_count += EXT_PER_MALLOC;
((next / EXT_PER_MALLOC) + 1) * EXT_PER_MALLOC;
count = (((ip->i_ext_used + ndesc) / EXT_PER_MALLOC) + 1) *
EXT_PER_MALLOC;
ip->i_con_count += EXT_PER_MALLOC;
((ip->i_ext_count / EXT_PER_MALLOC) + 1) * EXT_PER_MALLOC;
ip->i_con_count = EXT_PER_MALLOC;
((ip->i_ext_count / EXT_PER_MALLOC) + 1) * EXT_PER_MALLOC;
ip->i_con_count = EXT_PER_MALLOC;