zio_handle_panic_injection
zio_handle_panic_injection(spa, FTAG, 1);
zio_handle_panic_injection(spa, FTAG, 2);
zio_handle_panic_injection(spa, FTAG, 3);
zio_handle_panic_injection(spa, tag, 0);
extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);