/* * Macros for mbuf external storage. * * MCLGET allocates and adds an mbuf cluster to a normal mbuf; * the flag M_EXT is set upon success. * * MEXTMALLOC allocates external storage and adds it to * a normal mbuf; the flag M_EXT is set upon success. * * MEXTADD adds pre-allocated external storage to * a normal mbuf; the flag M_EXT is set upon success. */