werr = d.WalkDir(ctx, WalkDirOptions{
					Limit:          opts.perDiskLimit,
					Bucket:         opts.bucket,
					BaseDir:        opts.path,
					Recursive:      opts.recursive,
					ReportNotFound: opts.reportNotFound,
					FilterPrefix:   opts.filterPrefix,
					ForwardTo:      opts.forwardTo,
				}, w)
			}

			// fallback only when set.
			for {
				fd := fallback(werr)
				if fd == nil {

	}

	err := listPathRaw(ctx, listPathRawOptions{
		disks:          disks,
		bucket:         bucketName,
		recursive:      true,
		forwardTo:      "",
		minDisks:       listingQuorum,
		reportNotFound: false,
		agreed:         fn,
		partial: func(entries metaCacheEntries, _ []error) {
			entry, ok := entries.resolve(&resolver)
			if ok {
				fn(*entry)
			}
		},
		finished: nil,
	})

	lopts := listPathRawOptions{
		disks:          disks,
		bucket:         bucket,
		path:           path,
		filterPrefix:   filterPrefix,
		recursive:      recursive,
		forwardTo:      "",
		minDisks:       1,
		reportNotFound: false,
		agreed: func(entry metaCacheEntry) {
			if !recursive && prefix != entry.name {
				return
			}
			if err := healEntry(bucket, entry, scanMode); err != nil {
				cancel()
			}
		},

			ctx, cancel := context.WithCancel(ctx)

			err := listPathRaw(ctx, listPathRawOptions{
				disks:          f.disks,
				bucket:         bucket,
				path:           prefix,
				recursive:      true,
				reportNotFound: true,
				minDisks:       f.disksQuorum,
				agreed: func(entry metaCacheEntry) {
					f.updateCurrentPath(entry.name)
					if f.dataUsageScannerDebug {

	err := listPathRaw(ctx, listPathRawOptions{
		disks:          disks,
		bucket:         bi.Name,
		path:           bi.Prefix,
		recursive:      true,
		forwardTo:      "",
		minDisks:       listingQuorum,
		reportNotFound: false,
		agreed:         fn,
		partial: func(entries metaCacheEntries, _ []error) {
			entry, ok := entries.resolve(&resolver)
			if ok {
				fn(*entry)
			}
		},
		finished: nil,
	})

					path:           path,
					filterPrefix:   filterPrefix,
					recursive:      true,
					forwardTo:      opts.Marker,
					perDiskLimit:   opts.Limit,
					minDisks:       listingQuorum,
					reportNotFound: false,
					agreed:         send,
					partial: func(entries metaCacheEntries, _ []error) {
						entry, ok := entries.resolve(&resolver)
						if ok {
							send(*entry)
						}
					},