func (c controlRPC) VolumeSync(ctx context.Context, req *wire.VolumeSyncRequest) (*wire.VolumeSyncResponse, error) {
var volID db.VolumeID
loadVolume := func(tx *db.Tx) error {
v, err := tx.Volumes().GetByName(req.VolumeName)
if err != nil {
if err == db.ErrVolNameNotFound {
return grpc.Errorf(codes.InvalidArgument, "%v", err)
}
return err
}
v.VolumeID(&volID)
return nil
}
if err := c.app.DB.View(loadVolume); err != nil {
return nil, err
}
var pub peer.PublicKey
if err := pub.UnmarshalBinary(req.Pub); err != nil {
return nil, grpc.Errorf(codes.InvalidArgument, "bad peer public key: %v", err)
}
client, err := c.app.DialPeer(&pub)
if err != nil {
return nil, err
}
defer client.Close()
volIDBuf, err := volID.MarshalBinary()
if err != nil {
return nil, err
}
peerReq := &wirepeer.VolumeSyncPullRequest{
VolumeID: volIDBuf,
Path: req.Path,
}
stream, err := client.VolumeSyncPull(ctx, peerReq)
if err != nil {
return nil, err
}
first, err := stream.Recv()
if err != nil && err != io.EOF {
return nil, err
}
switch first.Error {
case wirepeer.VolumeSyncPullItem_SUCCESS:
// nothing
case wirepeer.VolumeSyncPullItem_NOT_A_DIRECTORY:
// TODO maybe we should handle the path not being a dir, somehow
return nil, grpc.Errorf(codes.FailedPrecondition, "path to sync is not a directory")
default:
return nil, grpc.Errorf(codes.FailedPrecondition, "peer gave error: %v", first.Error.String())
}
recv := func() ([]*wirepeer.Dirent, error) {
if first.Children != nil {
tmp := first.Children
first.Children = nil
return tmp, nil
}
item, err := stream.Recv()
if err != nil {
return nil, err
}
return item.Children, nil
}
ref, err := c.app.GetVolume(&volID)
if err != nil {
return nil, err
}
defer ref.Close()
if err := ref.FS().SyncReceive(ctx, req.Path, first.Peers, recv); err != nil {
return nil, err
}
return &wire.VolumeSyncResponse{}, nil
}
func TestSyncPull(t *testing.T) {
tmp := tempdir.New(t)
defer tmp.Cleanup()
app1 := bazfstestutil.NewApp(t, tmp.Subdir("app1"))
defer app1.Close()
app2 := bazfstestutil.NewApp(t, tmp.Subdir("app2"))
defer app2.Close()
var wg sync.WaitGroup
defer wg.Wait()
web1 := httptest.ServeHTTP(t, &wg, app1)
defer web1.Close()
pub1 := (*peer.PublicKey)(app1.Keys.Sign.Pub)
pub2 := (*peer.PublicKey)(app2.Keys.Sign.Pub)
var volID db.VolumeID
sharingKey := [32]byte{42, 42, 42, 13}
const volumeName = "foo"
setup1 := func(tx *db.Tx) error {
sharingKey, err := tx.SharingKeys().Add("testkey", &sharingKey)
if err != nil {
return err
}
v, err := tx.Volumes().Create(volumeName, "local", sharingKey)
if err != nil {
return err
}
v.VolumeID(&volID)
p, err := tx.Peers().Make(pub2)
if err != nil {
return err
}
if err := p.Volumes().Allow(v); err != nil {
return err
}
if err := p.Storage().Allow("local"); err != nil {
return err
}
return nil
}
if err := app1.DB.Update(setup1); err != nil {
t.Fatalf("app1 setup: %v", err)
}
setup2 := func(tx *db.Tx) error {
sharingKey, err := tx.SharingKeys().Add("testkey", &sharingKey)
if err != nil {
return err
}
v, err := tx.Volumes().Add(volumeName, &volID, "local", sharingKey)
if err != nil {
return err
}
v.VolumeID(&volID)
p, err := tx.Peers().Make(pub1)
if err != nil {
return err
}
if err := v.Storage().Add("jdoe", "peerkey:"+pub1.String(), sharingKey); err != nil {
return err
}
if err := p.Locations().Set(web1.Addr().String()); err != nil {
return err
}
return nil
}
if err := app2.DB.Update(setup2); err != nil {
t.Fatalf("app2 setup location: %v", err)
}
var chunkStore2 chunks.Store
openKV := func(tx *db.Tx) error {
// This cannot be combined into setup2 because OpenKV/DialPeer
// starts its own transaction, and wouldn't see the
// uncommitted peer.
v, err := tx.Volumes().GetByVolumeID(&volID)
if err != nil {
return err
}
kvstore, err := app2.OpenKV(tx, v.Storage())
if err != nil {
return err
}
chunkStore2 = kvchunks.New(kvstore)
return nil
}
if err := app2.DB.View(openKV); err != nil {
t.Fatalf("cannot open storage for app2: %v", err)
}
const testFileName = "greeting"
const testFileContent = "hello, world"
func() {
mnt := bazfstestutil.Mounted(t, app1, volumeName)
defer mnt.Close()
if err := ioutil.WriteFile(path.Join(mnt.Dir, testFileName), []byte(testFileContent), 0644); err != nil {
t.Fatalf("cannot create file: %v", err)
}
}()
client, err := app2.DialPeer(pub1)
if err != nil {
t.Fatalf("dial: %v", err)
}
defer client.Close()
volIDBuf, err := volID.MarshalBinary()
if err != nil {
t.Fatalf("marshal volume id: %v", err)
}
ctx := context.Background()
stream, err := client.VolumeSyncPull(ctx, &wire.VolumeSyncPullRequest{
VolumeID: volIDBuf,
})
if err != nil {
t.Fatalf("sync failed: %v", err)
}
item, err := stream.Recv()
if err != nil {
t.Fatalf("sync stream failed: %v", err)
}
if g, e := item.Error, wire.VolumeSyncPullItem_SUCCESS; g != e {
t.Errorf("unexpected error: %v != %v", g, e)
}
if g, e := item.Peers, map[uint32][]byte{
0: pub1[:],
1: pub2[:],
}; !reflect.DeepEqual(g, e) {
t.Errorf("bad peers: %v != %v", g, e)
}
wantFiles := map[string]func(*wire.Dirent){
testFileName: func(de *wire.Dirent) {
if de.File == nil {
t.Errorf("wrong type for %q, not a file: %v", de.Name, de)
return
}
var c clock.Clock
if err := c.UnmarshalBinary(de.Clock); err != nil {
t.Errorf("invalid clock for %q: %v", de.Name, err)
return
}
if g, e := c.String(), `{sync{0:1} mod{0:1} create{0:1}}`; g != e {
t.Errorf("wrong clock for %q: %v != %v", de.Name, g, e)
return
}
// verify file contents
manifest, err := de.File.Manifest.ToBlob("file")
if err != nil {
t.Errorf("cannot open manifest for %q: %v", de.Name, err)
return
}
blob, err := blobs.Open(chunkStore2, manifest)
if err != nil {
t.Errorf("cannot open blob for %q: %v", de.Name, err)
return
}
r := io.NewSectionReader(blob, 0, int64(blob.Size()))
buf, err := ioutil.ReadAll(r)
if err != nil {
t.Errorf("cannot read blob for %q: %v", de.Name, err)
return
}
if g, e := string(buf), testFileContent; g != e {
t.Errorf("wrong content for %q: %q != %q", de.Name, g, e)
}
},
}
for _, de := range item.Children {
fn, ok := wantFiles[de.Name]
if !ok {
t.Errorf("unexpected direntry: %q", de.Name)
continue
}
fn(de)
delete(wantFiles, de.Name)
}
for name, _ := range wantFiles {
t.Errorf("missing direntry: %q", name)
}
item, err = stream.Recv()
if err != io.EOF {
t.Errorf("expected eof, got error %v, item=%v", err, item)
}
}