drivers/md/dm-thin.c

245 	struct pool_features pf;
294 	return pool->pf.mode;
310 		if (!pool->pf.error_if_no_space)
1359 		if (len < pool->sectors_per_block && pool->pf.zero_new_blocks) {
1398 	if (pool->pf.zero_new_blocks) {
1603 		return pool->pf.error_if_no_space ? BLK_STS_NOSPC : 0;
2456 	if (get_pool_mode(pool) == PM_OUT_OF_DATA_SPACE && !pool->pf.error_if_no_space) {
2457 		pool->pf.error_if_no_space = true;
2611 		if (!pool->pf.error_if_no_space && no_space_timeout)
2619 		pool->pf.error_if_no_space = pt->requested_pf.error_if_no_space;
2629 	pool->pf.mode = new_mode;
2881 	pool->pf = pt->adjusted_pf;
2901 static void pool_features_init(struct pool_features *pf)
2903 	pf->mode = PM_WRITE;
2904 	pf->zero_new_blocks = true;
2905 	pf->discard_enabled = true;
2906 	pf->discard_passdown = true;
2907 	pf->error_if_no_space = false;
2968 	pool_features_init(&pool->pf);
3143 static int parse_pool_features(struct dm_arg_set *as, struct pool_features *pf,
3169 			pf->zero_new_blocks = false;
3172 			pf->discard_enabled = false;
3175 			pf->discard_passdown = false;
3178 			pf->mode = PM_READ_ONLY;
3181 			pf->error_if_no_space = true;
3290 	struct pool_features pf;
3322 	pool_features_init(&pf);
3325 	r = parse_pool_features(&as, &pf, ti);
3330 		((pf.mode == PM_READ_ONLY) ? 0 : BLK_OPEN_WRITE);
3366 			   block_size, pf.mode == PM_READ_ONLY, &ti->error, &pool_created);
3378 	if (!pool_created && pf.discard_enabled != pool->pf.discard_enabled) {
3389 	pt->adjusted_pf = pt->requested_pf = pf;
3398 	if (pf.discard_enabled && pf.discard_passdown) {
3884 static void emit_flags(struct pool_features *pf, char *result,
3887 	unsigned int count = !pf->zero_new_blocks + !pf->discard_enabled +
3888 		!pf->discard_passdown + (pf->mode == PM_READ_ONLY) +
3889 		pf->error_if_no_space;
3892 	if (!pf->zero_new_blocks)
3895 	if (!pf->discard_enabled)
3898 	if (!pf->discard_passdown)
3901 	if (pf->mode == PM_READ_ONLY)
3904 	if (pf->error_if_no_space)
4004 		if (!pool->pf.discard_enabled)
4006 		else if (pool->pf.discard_passdown)
4011 		if (pool->pf.error_if_no_space)
4277 	if (tc->pool->pf.discard_enabled) {
4492 	if (pool->pf.discard_enabled) {