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better distributed lock (#307)
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* refine distributed lock

* adjust invoke chain to new Lock interface

* add testcases

Co-authored-by: Xiaofan CHEN <[email protected]>
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jschwinger233 and Xiaofan CHEN authored Jan 4, 2021
1 parent 8c3fc63 commit 5798299
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Showing 33 changed files with 194 additions and 111 deletions.
4 changes: 2 additions & 2 deletions cluster/calcium/calcium_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -20,9 +20,9 @@ type dummyLock struct {
}

// Lock for lock
func (d *dummyLock) Lock(ctx context.Context) error {
func (d *dummyLock) Lock(ctx context.Context) (context.Context, error) {
d.m.Lock()
return nil
return context.Background(), nil
}

// Unlock for unlock
Expand Down
2 changes: 1 addition & 1 deletion cluster/calcium/capacity.go
Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ func (c *Calcium) CalculateCapacity(ctx context.Context, opts *types.DeployOptio
Total: 0,
NodeCapacities: map[string]int{},
}
return msg, c.withNodesLocked(ctx, opts.Podname, opts.Nodenames, nil, false, func(nodeMap map[string]*types.Node) error {
return msg, c.withNodesLocked(ctx, opts.Podname, opts.Nodenames, nil, false, func(ctx context.Context, nodeMap map[string]*types.Node) error {
if opts.DeployStrategy != strategy.Dummy {
if _, msg.NodeCapacities, err = c.doAllocResource(ctx, nodeMap, opts); err != nil {
return errors.WithStack(err)
Expand Down
2 changes: 1 addition & 1 deletion cluster/calcium/capacity_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,7 @@ func TestCalculateCapacity(t *testing.T) {
}
store.On("GetNode", mock.Anything, mock.Anything).Return(node1, nil)
lock := &lockmocks.DistributedLock{}
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
lock.On("Unlock", mock.Anything).Return(nil)
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
// failed by wrong resource
Expand Down
2 changes: 1 addition & 1 deletion cluster/calcium/control.go
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ func (c *Calcium) ControlWorkload(ctx context.Context, IDs []string, t string, f
go func(ID string) {
defer wg.Done()
var message []*bytes.Buffer
err := c.withWorkloadLocked(ctx, ID, func(workload *types.Workload) error {
err := c.withWorkloadLocked(ctx, ID, func(ctx context.Context, workload *types.Workload) error {
var err error
switch t {
case cluster.WorkloadStop:
Expand Down
6 changes: 3 additions & 3 deletions cluster/calcium/control_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ func TestControlStart(t *testing.T) {
ctx := context.Background()
store := &storemocks.Store{}
lock := &lockmocks.DistributedLock{}
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
lock.On("Unlock", mock.Anything).Return(nil)
c.store = store
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
Expand Down Expand Up @@ -111,7 +111,7 @@ func TestControlStop(t *testing.T) {
ctx := context.Background()
store := &storemocks.Store{}
lock := &lockmocks.DistributedLock{}
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
lock.On("Unlock", mock.Anything).Return(nil)
c.store = store
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
Expand Down Expand Up @@ -156,7 +156,7 @@ func TestControlRestart(t *testing.T) {
ctx := context.Background()
store := &storemocks.Store{}
lock := &lockmocks.DistributedLock{}
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
lock.On("Unlock", mock.Anything).Return(nil)
c.store = store
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
Expand Down
2 changes: 1 addition & 1 deletion cluster/calcium/copy.go
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ func (c *Calcium) Copy(ctx context.Context, opts *types.CopyOptions) (chan *type
wg.Add(1)
go func(id string, paths []string) {
defer wg.Done()
if err := c.withWorkloadLocked(ctx, id, func(workload *types.Workload) error {
if err := c.withWorkloadLocked(ctx, id, func(ctx context.Context, workload *types.Workload) error {
for _, path := range paths {
resp, name, err := workload.Engine.VirtualizationCopyFrom(ctx, workload.ID, path)
ch <- makeCopyMessage(id, name, path, err, resp)
Expand Down
2 changes: 1 addition & 1 deletion cluster/calcium/copy_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ func TestCopy(t *testing.T) {
}
store := &storemocks.Store{}
lock := &lockmocks.DistributedLock{}
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
lock.On("Unlock", mock.Anything).Return(nil)
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
c.store = store
Expand Down
4 changes: 2 additions & 2 deletions cluster/calcium/create.go
Original file line number Diff line number Diff line change
Expand Up @@ -66,7 +66,7 @@ func (c *Calcium) doCreateWorkloads(ctx context.Context, opts *types.DeployOptio

// if: alloc resources
func(ctx context.Context) error {
return c.withNodesLocked(ctx, opts.Podname, opts.Nodenames, opts.NodeLabels, false, func(nodeMap map[string]*types.Node) (err error) {
return c.withNodesLocked(ctx, opts.Podname, opts.Nodenames, opts.NodeLabels, false, func(ctx context.Context, nodeMap map[string]*types.Node) (err error) {
defer func() {
if err != nil {
ch <- &types.CreateWorkloadMessage{Error: err}
Expand Down Expand Up @@ -102,7 +102,7 @@ func (c *Calcium) doCreateWorkloads(ctx context.Context, opts *types.DeployOptio
// rollback: give back resources
func(ctx context.Context, _ bool) (err error) {
for nodename, rollbackIndices := range rollbackMap {
if e := c.withNodeLocked(ctx, nodename, func(node *types.Node) error {
if e := c.withNodeLocked(ctx, nodename, func(ctx context.Context, node *types.Node) error {
for _, plan := range plans {
plan.RollbackChangesOnNode(node, rollbackIndices...) // nolint:scopelint
}
Expand Down
4 changes: 2 additions & 2 deletions cluster/calcium/create_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -122,13 +122,13 @@ func TestCreateWorkloadTxn(t *testing.T) {

// doAllocResource fails: MakeDeployStatus
lock := &lockmocks.DistributedLock{}
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.Background(), nil)
lock.On("Unlock", mock.Anything).Return(nil)
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
store.On("GetPod", mock.Anything, mock.Anything).Return(pod1, nil)
store.On("GetNodesByPod", mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return(nodes, nil)
store.On("GetNode",
mock.AnythingOfType("*context.timerCtx"),
mock.AnythingOfType("*context.emptyCtx"),
mock.AnythingOfType("string"),
).Return(
func(_ context.Context, name string) (node *types.Node) {
Expand Down
4 changes: 2 additions & 2 deletions cluster/calcium/dissociate.go
Original file line number Diff line number Diff line change
Expand Up @@ -15,8 +15,8 @@ func (c *Calcium) DissociateWorkload(ctx context.Context, IDs []string) (chan *t
go func() {
defer close(ch)
for _, ID := range IDs {
err := c.withWorkloadLocked(ctx, ID, func(workload *types.Workload) error {
return c.withNodeLocked(ctx, workload.Nodename, func(node *types.Node) (err error) {
err := c.withWorkloadLocked(ctx, ID, func(ctx context.Context, workload *types.Workload) error {
return c.withNodeLocked(ctx, workload.Nodename, func(ctx context.Context, node *types.Node) (err error) {
return utils.Txn(
ctx,
// if
Expand Down
2 changes: 1 addition & 1 deletion cluster/calcium/dissociate_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,7 @@ func TestDissociateWorkload(t *testing.T) {
c.store = store

lock := &lockmocks.DistributedLock{}
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
lock.On("Unlock", mock.Anything).Return(nil)

c1 := &types.Workload{
Expand Down
37 changes: 20 additions & 17 deletions cluster/calcium/lock.go
Original file line number Diff line number Diff line change
Expand Up @@ -11,12 +11,13 @@ import (
"github.com/projecteru2/core/types"
)

func (c *Calcium) doLock(ctx context.Context, name string, timeout time.Duration) (lock.DistributedLock, error) {
func (c *Calcium) doLock(ctx context.Context, name string, timeout time.Duration) (lock.DistributedLock, context.Context, error) {
lock, err := c.store.CreateLock(name, timeout)
if err != nil {
return nil, err
return nil, nil, err
}
return lock, lock.Lock(ctx)
ctx, err = lock.Lock(ctx)
return lock, ctx, err
}

func (c *Calcium) doUnlock(ctx context.Context, lock lock.DistributedLock, msg string) error {
Expand All @@ -34,54 +35,56 @@ func (c *Calcium) doUnlockAll(ctx context.Context, locks map[string]lock.Distrib
}
}

func (c *Calcium) withWorkloadLocked(ctx context.Context, ID string, f func(workload *types.Workload) error) error {
return c.withWorkloadsLocked(ctx, []string{ID}, func(workloads map[string]*types.Workload) error {
func (c *Calcium) withWorkloadLocked(ctx context.Context, ID string, f func(context.Context, *types.Workload) error) error {
return c.withWorkloadsLocked(ctx, []string{ID}, func(ctx context.Context, workloads map[string]*types.Workload) error {
if c, ok := workloads[ID]; ok {
return f(c)
return f(ctx, c)
}
return types.ErrWorkloadNotExists
})
}

func (c *Calcium) withNodeLocked(ctx context.Context, nodename string, f func(node *types.Node) error) error {
return c.withNodesLocked(ctx, "", []string{nodename}, nil, true, func(nodes map[string]*types.Node) error {
func (c *Calcium) withNodeLocked(ctx context.Context, nodename string, f func(context.Context, *types.Node) error) error {
return c.withNodesLocked(ctx, "", []string{nodename}, nil, true, func(ctx context.Context, nodes map[string]*types.Node) error {
if n, ok := nodes[nodename]; ok {
return f(n)
return f(ctx, n)
}
return types.ErrNodeNotExists
})
}

func (c *Calcium) withWorkloadsLocked(ctx context.Context, IDs []string, f func(workloads map[string]*types.Workload) error) error {
func (c *Calcium) withWorkloadsLocked(ctx context.Context, IDs []string, f func(context.Context, map[string]*types.Workload) error) error {
workloads := map[string]*types.Workload{}
locks := map[string]lock.DistributedLock{}
defer func() { c.doUnlockAll(ctx, locks) }()
defer func() { c.doUnlockAll(context.Background(), locks) }()
cs, err := c.GetWorkloads(ctx, IDs)
if err != nil {
return err
}
var lock lock.DistributedLock
for _, workload := range cs {
lock, err := c.doLock(ctx, fmt.Sprintf(cluster.WorkloadLock, workload.ID), c.config.LockTimeout)
lock, ctx, err = c.doLock(ctx, fmt.Sprintf(cluster.WorkloadLock, workload.ID), c.config.LockTimeout)
if err != nil {
return err
}
locks[workload.ID] = lock
workloads[workload.ID] = workload
}
return f(workloads)
return f(ctx, workloads)
}

func (c *Calcium) withNodesLocked(ctx context.Context, podname string, nodenames []string, labels map[string]string, all bool, f func(nodes map[string]*types.Node) error) error {
func (c *Calcium) withNodesLocked(ctx context.Context, podname string, nodenames []string, labels map[string]string, all bool, f func(context.Context, map[string]*types.Node) error) error {
nodes := map[string]*types.Node{}
locks := map[string]lock.DistributedLock{}
defer c.doUnlockAll(ctx, locks)
defer c.doUnlockAll(context.Background(), locks)
ns, err := c.getNodes(ctx, podname, nodenames, labels, all)
if err != nil {
return err
}

var lock lock.DistributedLock
for _, n := range ns {
lock, err := c.doLock(ctx, fmt.Sprintf(cluster.NodeLock, podname, n.Name), c.config.LockTimeout)
lock, ctx, err = c.doLock(ctx, fmt.Sprintf(cluster.NodeLock, podname, n.Name), c.config.LockTimeout)
if err != nil {
return err
}
Expand All @@ -94,5 +97,5 @@ func (c *Calcium) withNodesLocked(ctx context.Context, podname string, nodenames
}
nodes[n.Name] = node
}
return f(nodes)
return f(ctx, nodes)
}
52 changes: 26 additions & 26 deletions cluster/calcium/lock_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -21,18 +21,18 @@ func TestDoLock(t *testing.T) {
c.store = store
// create lock failed
store.On("CreateLock", mock.Anything, mock.Anything).Return(nil, types.ErrNoETCD).Once()
_, err := c.doLock(ctx, "somename", 1)
_, _, err := c.doLock(ctx, "somename", 1)
assert.Error(t, err)

lock := &lockmocks.DistributedLock{}
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
// lock failed
lock.On("Lock", mock.Anything).Return(types.ErrNoETCD).Once()
_, err = c.doLock(ctx, "somename", 1)
lock.On("Lock", mock.Anything).Return(context.TODO(), types.ErrNoETCD).Once()
_, _, err = c.doLock(ctx, "somename", 1)
assert.Error(t, err)
// success
lock.On("Lock", mock.Anything).Return(nil)
_, err = c.doLock(ctx, "somename", 1)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
_, _, err = c.doLock(ctx, "somename", 1)
assert.NoError(t, err)
}

Expand All @@ -57,15 +57,15 @@ func TestWithWorkloadsLocked(t *testing.T) {
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
lock.On("Unlock", mock.Anything).Return(nil)
// failed to get lock
lock.On("Lock", mock.Anything).Return(types.ErrNoETCD).Once()
lock.On("Lock", mock.Anything).Return(context.TODO(), types.ErrNoETCD).Once()
store.On("GetWorkloads", mock.Anything, mock.Anything).Return([]*types.Workload{{}}, nil).Once()
err := c.withWorkloadsLocked(ctx, []string{"c1", "c2"}, func(workloads map[string]*types.Workload) error { return nil })
err := c.withWorkloadsLocked(ctx, []string{"c1", "c2"}, func(ctx context.Context, workloads map[string]*types.Workload) error { return nil })
assert.Error(t, err)
// success
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
// failed by getworkload
store.On("GetWorkloads", mock.Anything, mock.Anything).Return(nil, types.ErrNoETCD).Once()
err = c.withWorkloadsLocked(ctx, []string{"c1", "c2"}, func(workloads map[string]*types.Workload) error { return nil })
err = c.withWorkloadsLocked(ctx, []string{"c1", "c2"}, func(ctx context.Context, workloads map[string]*types.Workload) error { return nil })
assert.Error(t, err)
engine := &enginemocks.API{}
workload := &types.Workload{
Expand All @@ -74,7 +74,7 @@ func TestWithWorkloadsLocked(t *testing.T) {
}
store.On("GetWorkloads", mock.Anything, mock.Anything).Return([]*types.Workload{workload}, nil)
// success
err = c.withWorkloadsLocked(ctx, []string{"c1", "c1"}, func(workloads map[string]*types.Workload) error {
err = c.withWorkloadsLocked(ctx, []string{"c1", "c1"}, func(ctx context.Context, workloads map[string]*types.Workload) error {
assert.Len(t, workloads, 1)
return nil
})
Expand All @@ -91,15 +91,15 @@ func TestWithWorkloadLocked(t *testing.T) {
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
lock.On("Unlock", mock.Anything).Return(nil)
// failed to get lock
lock.On("Lock", mock.Anything).Return(types.ErrNoETCD).Once()
lock.On("Lock", mock.Anything).Return(context.TODO(), types.ErrNoETCD).Once()
store.On("GetWorkloads", mock.Anything, mock.Anything).Return([]*types.Workload{{}}, nil).Once()
err := c.withWorkloadLocked(ctx, "c1", func(workload *types.Workload) error { return nil })
err := c.withWorkloadLocked(ctx, "c1", func(ctx context.Context, workload *types.Workload) error { return nil })
assert.Error(t, err)
// success
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
// failed by getworkload
store.On("GetWorkloads", mock.Anything, mock.Anything).Return(nil, types.ErrNoETCD).Once()
err = c.withWorkloadLocked(ctx, "c1", func(workload *types.Workload) error { return nil })
err = c.withWorkloadLocked(ctx, "c1", func(ctx context.Context, workload *types.Workload) error { return nil })
assert.Error(t, err)
engine := &enginemocks.API{}
workload := &types.Workload{
Expand All @@ -108,7 +108,7 @@ func TestWithWorkloadLocked(t *testing.T) {
}
store.On("GetWorkloads", mock.Anything, mock.Anything).Return([]*types.Workload{workload}, nil)
// success
err = c.withWorkloadLocked(ctx, "c1", func(workload *types.Workload) error {
err = c.withWorkloadLocked(ctx, "c1", func(ctx context.Context, workload *types.Workload) error {
assert.Equal(t, workload.ID, "c1")
return nil
})
Expand All @@ -132,12 +132,12 @@ func TestWithNodesLocked(t *testing.T) {
}
// failed by list nodes
store.On("GetNodesByPod", mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return([]*types.Node{}, types.ErrNoETCD).Once()
err := c.withNodesLocked(ctx, "test", nil, nil, false, func(nodes map[string]*types.Node) error { return nil })
err := c.withNodesLocked(ctx, "test", nil, nil, false, func(ctx context.Context, nodes map[string]*types.Node) error { return nil })
assert.Error(t, err)
store.On("GetNodesByPod", mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return([]*types.Node{}, nil).Once()
// failed by filter
var ns map[string]*types.Node
err = c.withNodesLocked(ctx, "test", nil, map[string]string{"eru": "2"}, false, func(nodes map[string]*types.Node) error {
err = c.withNodesLocked(ctx, "test", nil, map[string]string{"eru": "2"}, false, func(ctx context.Context, nodes map[string]*types.Node) error {
ns = nodes
return nil
})
Expand All @@ -146,25 +146,25 @@ func TestWithNodesLocked(t *testing.T) {
store.On("GetNodesByPod", mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return([]*types.Node{}, nil)
// failed by getnode
store.On("GetNode", mock.Anything, mock.Anything).Return(nil, types.ErrNoETCD).Once()
err = c.withNodesLocked(ctx, "test", []string{"test"}, nil, false, func(nodes map[string]*types.Node) error { return nil })
err = c.withNodesLocked(ctx, "test", []string{"test"}, nil, false, func(ctx context.Context, nodes map[string]*types.Node) error { return nil })
assert.Error(t, err)
store.On("GetNode", mock.Anything, mock.Anything).Return(node1, nil).Once()
// failed by lock
lock := &lockmocks.DistributedLock{}
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
lock.On("Unlock", mock.Anything).Return(nil)
// failed to get lock
lock.On("Lock", mock.Anything).Return(types.ErrNoETCD).Once()
err = c.withNodesLocked(ctx, "test", []string{"test"}, nil, false, func(nodes map[string]*types.Node) error { return nil })
lock.On("Lock", mock.Anything).Return(context.TODO(), types.ErrNoETCD).Once()
err = c.withNodesLocked(ctx, "test", []string{"test"}, nil, false, func(ctx context.Context, nodes map[string]*types.Node) error { return nil })
assert.Error(t, err)
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
// failed by get locked node
store.On("GetNode", mock.Anything, mock.Anything).Return(nil, types.ErrNoETCD).Once()
err = c.withNodesLocked(ctx, "test", []string{"test"}, nil, false, func(nodes map[string]*types.Node) error { return nil })
err = c.withNodesLocked(ctx, "test", []string{"test"}, nil, false, func(ctx context.Context, nodes map[string]*types.Node) error { return nil })
assert.Error(t, err)
store.On("GetNode", mock.Anything, mock.Anything).Return(node1, nil)
// success
err = c.withNodesLocked(ctx, "test", []string{"test"}, nil, false, func(nodes map[string]*types.Node) error {
err = c.withNodesLocked(ctx, "test", []string{"test"}, nil, false, func(ctx context.Context, nodes map[string]*types.Node) error {
assert.Len(t, nodes, 1)
return nil
})
Expand All @@ -190,14 +190,14 @@ func TestWithNodeLocked(t *testing.T) {
lock := &lockmocks.DistributedLock{}
store.On("CreateLock", mock.Anything, mock.Anything).Return(lock, nil)
lock.On("Unlock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(nil)
lock.On("Lock", mock.Anything).Return(context.TODO(), nil)
// failed by get locked node
store.On("GetNode", mock.Anything, mock.Anything).Return(nil, types.ErrNoETCD).Once()
err := c.withNodeLocked(ctx, "test", func(node *types.Node) error { return nil })
err := c.withNodeLocked(ctx, "test", func(ctx context.Context, node *types.Node) error { return nil })
assert.Error(t, err)
store.On("GetNode", mock.Anything, mock.Anything).Return(node1, nil)
// success
err = c.withNodeLocked(ctx, "test", func(node *types.Node) error {
err = c.withNodeLocked(ctx, "test", func(ctx context.Context, node *types.Node) error {
assert.Equal(t, node.Name, node1.Name)
return nil
})
Expand Down
4 changes: 2 additions & 2 deletions cluster/calcium/node.go
Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ func (c *Calcium) RemoveNode(ctx context.Context, nodename string) error {
if nodename == "" {
return types.ErrEmptyNodeName
}
return c.withNodeLocked(ctx, nodename, func(node *types.Node) error {
return c.withNodeLocked(ctx, nodename, func(ctx context.Context, node *types.Node) error {
ws, err := c.ListNodeWorkloads(ctx, node.Name, nil)
if err != nil {
return err
Expand Down Expand Up @@ -53,7 +53,7 @@ func (c *Calcium) SetNode(ctx context.Context, opts *types.SetNodeOptions) (*typ
return nil, err
}
var n *types.Node
return n, c.withNodeLocked(ctx, opts.Nodename, func(node *types.Node) error {
return n, c.withNodeLocked(ctx, opts.Nodename, func(ctx context.Context, node *types.Node) error {
litter.Dump(opts)
opts.Normalize(node)
n = node
Expand Down
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