iodc_data
struct pdc_iodc_read *buf1, size_t sz1, struct iodc_data *buf2,
struct iodc_data hm_type;
struct iodc_data ca_type; /* iodc-specific type descrition */
#define IOSPA(spa,iodc_data) \
(spa | iodc_data.iodc_spa_shift | iodc_data.iodc_spa_enb << 5 | \
iodc_data.iodc_spa_pack << 6 | iodc_data.iodc_spa_io << 7))
struct iodc_data *, size_t);
struct iodc_data mptr;