fs/bcachefs/chardev.c

25 /* returns with ref on ca->ref */
29 	struct bch_dev *ca;
36 		ca = rcu_dereference(c->devs[dev]);
37 		if (ca)
38 			percpu_ref_get(&ca->ref);
41 		if (!ca)
51 		ca = bch2_dev_lookup(c, path);
55 	return ca;
334 	struct bch_dev *ca;
346 	ca = bch2_device_lookup(c, arg.dev, arg.flags);
347 	if (IS_ERR(ca))
348 		return PTR_ERR(ca);
350 	return bch2_dev_remove(c, ca, arg.flags);
376 	struct bch_dev *ca;
389 	ca = bch2_device_lookup(c, arg.dev, arg.flags);
390 	if (IS_ERR(ca))
391 		return PTR_ERR(ca);
393 	ret = bch2_dev_offline(c, ca, arg.flags);
394 	percpu_ref_put(&ca->ref);
401 	struct bch_dev *ca;
415 	ca = bch2_device_lookup(c, arg.dev, arg.flags);
416 	if (IS_ERR(ca))
417 		return PTR_ERR(ca);
419 	ret = bch2_dev_set_state(c, ca, arg.new_state, arg.flags);
423 	percpu_ref_put(&ca->ref);
587 	struct bch_dev *ca;
602 	ca = bch2_device_lookup(c, arg.dev, arg.flags);
603 	if (IS_ERR(ca))
604 		return PTR_ERR(ca);
606 	src = bch2_dev_usage_read(ca);
608 	arg.state		= ca->mi.state;
609 	arg.bucket_size		= ca->mi.bucket_size;
610 	arg.nr_buckets		= ca->mi.nbuckets - ca->mi.first_bucket;
618 	percpu_ref_put(&ca->ref);
628 	struct bch_dev *ca;
643 	ca = bch2_device_lookup(c, arg.dev, arg.flags);
644 	if (IS_ERR(ca))
645 		return PTR_ERR(ca);
647 	src = bch2_dev_usage_read(ca);
649 	arg.state		= ca->mi.state;
650 	arg.bucket_size		= ca->mi.bucket_size;
652 	arg.nr_buckets		= ca->mi.nbuckets - ca->mi.first_bucket;
670 	percpu_ref_put(&ca->ref);
677 	struct bch_dev *ca = NULL;
691 		ca = bch2_device_lookup(c, arg.dev, arg.flags);
693 		if (IS_ERR(ca)) {
694 			ret = PTR_ERR(ca);
698 		sb = ca->disk_sb.sb;
711 	if (!IS_ERR_OR_NULL(ca))
712 		percpu_ref_put(&ca->ref);
728 	for_each_online_member(c, ca)
729 		if (ca->dev == dev) {
730 			percpu_ref_put(&ca->io_ref);
731 			return ca->dev_idx;
740 	struct bch_dev *ca;
750 	ca = bch2_device_lookup(c, arg.dev, arg.flags);
751 	if (IS_ERR(ca))
752 		return PTR_ERR(ca);
754 	ret = bch2_dev_resize(c, ca, arg.nbuckets);
756 	percpu_ref_put(&ca->ref);
763 	struct bch_dev *ca;
776 	ca = bch2_device_lookup(c, arg.dev, arg.flags);
777 	if (IS_ERR(ca))
778 		return PTR_ERR(ca);
780 	ret = bch2_set_nr_journal_buckets(c, ca, arg.nbuckets);
782 	percpu_ref_put(&ca->ref);