dsl_pool_open_special_dir
VERIFY0(dsl_pool_open_special_dir(dp,
err = dsl_pool_open_special_dir(dp, MOS_DIR_NAME, &dp->dp_mos_dir);
err = dsl_pool_open_special_dir(dp, ORIGIN_DIR_NAME, &dd);
err = dsl_pool_open_special_dir(dp, FREE_DIR_NAME,
(void) dsl_pool_open_special_dir(dp, LEAK_DIR_NAME,
VERIFY0(dsl_pool_open_special_dir(dp,
VERIFY0(dsl_pool_open_special_dir(dp,
VERIFY0(dsl_pool_open_special_dir(dp,
int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);