func newRWFolder(m *Model, shortID uint64, cfg config.FolderConfiguration) *rwFolder {
	return &rwFolder{
		stateTracker: stateTracker{
			folder: cfg.ID,
			mut:    sync.NewMutex(),
		},

		model:            m,
		progressEmitter:  m.progressEmitter,
		virtualMtimeRepo: db.NewVirtualMtimeRepo(m.db, cfg.ID),

		folder:      cfg.ID,
		dir:         cfg.Path(),
		scanIntv:    time.Duration(cfg.RescanIntervalS) * time.Second,
		ignorePerms: cfg.IgnorePerms,
		copiers:     cfg.Copiers,
		pullers:     cfg.Pullers,
		shortID:     shortID,
		order:       cfg.Order,

		stop:        make(chan struct{}),
		queue:       newJobQueue(),
		pullTimer:   time.NewTimer(shortPullIntv),
		scanTimer:   time.NewTimer(time.Millisecond), // The first scan should be done immediately.
		delayScan:   make(chan time.Duration),
		scanNow:     make(chan rescanRequest),
		remoteIndex: make(chan struct{}, 1), // This needs to be 1-buffered so that we queue a notification if we're busy doing a pull when it comes.

		errorsMut: sync.NewMutex(),
	}
}

func newRWFolder(model *Model, cfg config.FolderConfiguration, ver versioner.Versioner) service {
	f := &rwFolder{
		folder: folder{
			stateTracker: newStateTracker(cfg.ID),
			scan:         newFolderScanner(cfg),
			stop:         make(chan struct{}),
			model:        model,
		},

		virtualMtimeRepo: db.NewVirtualMtimeRepo(model.db, cfg.ID),
		dir:              cfg.Path(),
		ignorePerms:      cfg.IgnorePerms,
		copiers:          cfg.Copiers,
		pullers:          cfg.Pullers,
		order:            cfg.Order,
		maxConflicts:     cfg.MaxConflicts,
		allowSparse:      !cfg.DisableSparseFiles,
		checkFreeSpace:   cfg.MinDiskFreePct != 0,
		versioner:        ver,

		queue:       newJobQueue(),
		pullTimer:   time.NewTimer(time.Second),
		remoteIndex: make(chan struct{}, 1), // This needs to be 1-buffered so that we queue a notification if we're busy doing a pull when it comes.

		errorsMut: sync.NewMutex(),

		initialScanCompleted: make(chan struct{}),
	}

	f.configureCopiersAndPullers(cfg)

	return f
}

func newRWFolder(m *Model, shortID uint64, cfg config.FolderConfiguration) *rwFolder {
	p := &rwFolder{
		stateTracker: stateTracker{
			folder: cfg.ID,
			mut:    sync.NewMutex(),
		},

		model:            m,
		progressEmitter:  m.progressEmitter,
		virtualMtimeRepo: db.NewVirtualMtimeRepo(m.db, cfg.ID),

		folder:         cfg.ID,
		dir:            cfg.Path(),
		scanIntv:       time.Duration(cfg.RescanIntervalS) * time.Second,
		ignorePerms:    cfg.IgnorePerms,
		copiers:        cfg.Copiers,
		pullers:        cfg.Pullers,
		shortID:        shortID,
		order:          cfg.Order,
		maxConflicts:   cfg.MaxConflicts,
		allowSparse:    !cfg.DisableSparseFiles,
		checkFreeSpace: cfg.MinDiskFreePct != 0,

		stop:        make(chan struct{}),
		queue:       newJobQueue(),
		pullTimer:   time.NewTimer(time.Second),
		scanTimer:   time.NewTimer(time.Millisecond), // The first scan should be done immediately.
		delayScan:   make(chan time.Duration),
		scanNow:     make(chan rescanRequest),
		remoteIndex: make(chan struct{}, 1), // This needs to be 1-buffered so that we queue a notification if we're busy doing a pull when it comes.

		errorsMut: sync.NewMutex(),
	}

	if p.copiers == 0 {
		p.copiers = defaultCopiers
	}
	if p.pullers == 0 {
		p.pullers = defaultPullers
	}

	if cfg.PullerPauseS == 0 {
		p.pause = defaultPullerPause
	} else {
		p.pause = time.Duration(cfg.PullerPauseS) * time.Second
	}

	if cfg.PullerSleepS == 0 {
		p.sleep = defaultPullerSleep
	} else {
		p.sleep = time.Duration(cfg.PullerSleepS) * time.Second
	}

	return p
}