pool_features
struct pool_features pf;
static void pool_features_init(struct pool_features *pf)
static int parse_pool_features(struct dm_arg_set *as, struct pool_features *pf,
struct pool_features pf;
struct pool_features requested_pf; /* Features requested during table load */
struct pool_features adjusted_pf; /* Features used after adjusting for constituent devices */
static void emit_flags(struct pool_features *pf, char *result,