// Recursive call for verifying the structure of a trickledag
func verifyTDagRec(nd *dag.Node, depth, direct, layerRepeat int, ds dag.DAGService) error {
if depth == 0 {
// zero depth dag is raw data block
if len(nd.Links) > 0 {
return errors.New("expected direct block")
}
pbn, err := ft.FromBytes(nd.Data)
if err != nil {
return err
}
if pbn.GetType() != ft.TRaw {
return errors.New("Expected raw block")
}
return nil
}
// Verify this is a branch node
pbn, err := ft.FromBytes(nd.Data)
if err != nil {
return err
}
if pbn.GetType() != ft.TFile {
return errors.New("expected file as branch node")
}
if len(pbn.Data) > 0 {
return errors.New("branch node should not have data")
}
for i := 0; i < len(nd.Links); i++ {
child, err := nd.Links[i].GetNode(context.TODO(), ds)
if err != nil {
return err
}
if i < direct {
// Direct blocks
err := verifyTDagRec(child, 0, direct, layerRepeat, ds)
if err != nil {
return err
}
} else {
// Recursive trickle dags
rdepth := ((i - direct) / layerRepeat) + 1
if rdepth >= depth && depth > 0 {
return errors.New("Child dag was too deep!")
}
err := verifyTDagRec(child, rdepth, direct, layerRepeat, ds)
if err != nil {
return err
}
}
}
return nil
}
func printDag(nd *mdag.Node, ds mdag.DAGService, indent int) {
pbd, err := ft.FromBytes(nd.Data)
if err != nil {
panic(err)
}
for i := 0; i < indent; i++ {
fmt.Print(" ")
}
fmt.Printf("{size = %d, type = %s, children = %d", pbd.GetFilesize(), pbd.GetType().String(), len(pbd.GetBlocksizes()))
if len(nd.Links) > 0 {
fmt.Println()
}
for _, lnk := range nd.Links {
child, err := lnk.GetNode(context.Background(), ds)
if err != nil {
panic(err)
}
printDag(child, ds, indent+1)
}
if len(nd.Links) > 0 {
for i := 0; i < indent; i++ {
fmt.Print(" ")
}
}
fmt.Println("}")
}
// childFile returns a file under this directory by the given name if it exists
func (d *Directory) childFile(name string) (*File, error) {
fi, ok := d.files[name]
if ok {
return fi, nil
}
nd, err := d.childFromDag(name)
if err != nil {
return nil, err
}
i, err := ft.FromBytes(nd.Data)
if err != nil {
return nil, err
}
switch i.GetType() {
case ufspb.Data_Directory:
return nil, ErrIsDirectory
case ufspb.Data_File:
nfi, err := NewFile(name, nd, d, d.fs)
if err != nil {
return nil, err
}
d.files[name] = nfi
return nfi, nil
case ufspb.Data_Metadata:
return nil, ErrNotYetImplemented
default:
return nil, ErrInvalidChild
}
}
// AddChild adds the node 'nd' under this directory giving it the name 'name'
func (d *Directory) AddChild(name string, nd *dag.Node) error {
d.Lock()
defer d.Unlock()
pbn, err := ft.FromBytes(nd.Data)
if err != nil {
return err
}
_, err = d.childUnsync(name)
if err == nil {
return errors.New("directory already has entry by that name")
}
err = d.node.AddNodeLinkClean(name, nd)
if err != nil {
return err
}
switch pbn.GetType() {
case ft.TDirectory:
d.childDirs[name] = NewDirectory(d.ctx, name, nd, d, d.fs)
case ft.TFile, ft.TMetadata, ft.TRaw:
nfi, err := NewFile(name, nd, d, d.fs)
if err != nil {
return err
}
d.files[name] = nfi
default:
return ErrInvalidChild
}
return d.parent.closeChild(d.name, d.node)
}
// childDir returns a directory under this directory by the given name if it
// exists.
func (d *Directory) childDir(name string) (*Directory, error) {
dir, ok := d.childDirs[name]
if ok {
return dir, nil
}
nd, err := d.childFromDag(name)
if err != nil {
return nil, err
}
i, err := ft.FromBytes(nd.Data)
if err != nil {
return nil, err
}
switch i.GetType() {
case ufspb.Data_Directory:
ndir := NewDirectory(d.ctx, name, nd, d, d.fs)
d.childDirs[name] = ndir
return ndir, nil
case ufspb.Data_File:
return nil, fmt.Errorf("%s is not a directory", name)
case ufspb.Data_Metadata:
return nil, ErrNotYetImplemented
default:
return nil, ErrInvalidChild
}
}
// newKeyRoot creates a new KeyRoot for the given key, and starts up a republisher routine
// for it
func (fs *Filesystem) newKeyRoot(parent context.Context, k ci.PrivKey) (*KeyRoot, error) {
hash, err := k.GetPublic().Hash()
if err != nil {
return nil, err
}
name := "/ipns/" + key.Key(hash).String()
root := new(KeyRoot)
root.key = k
root.fs = fs
root.name = name
ctx, cancel := context.WithCancel(parent)
defer cancel()
pointsTo, err := fs.nsys.Resolve(ctx, name)
if err != nil {
err = namesys.InitializeKeyspace(ctx, fs.dserv, fs.nsys, fs.pins, k)
if err != nil {
return nil, err
}
pointsTo, err = fs.nsys.Resolve(ctx, name)
if err != nil {
return nil, err
}
}
mnode, err := fs.resolver.ResolvePath(ctx, pointsTo)
if err != nil {
log.Errorf("Failed to retrieve value '%s' for ipns entry: %s\n", pointsTo, err)
return nil, err
}
root.node = mnode
root.repub = NewRepublisher(root, time.Millisecond*300, time.Second*3)
go root.repub.Run(parent)
pbn, err := ft.FromBytes(mnode.Data)
if err != nil {
log.Error("IPNS pointer was not unixfs node")
return nil, err
}
switch pbn.GetType() {
case ft.TDirectory:
root.val = NewDirectory(ctx, pointsTo.String(), mnode, root, fs)
case ft.TFile, ft.TMetadata, ft.TRaw:
fi, err := NewFile(pointsTo.String(), mnode, root, fs)
if err != nil {
return nil, err
}
root.val = fi
default:
panic("unrecognized! (NYI)")
}
return root, nil
}
func (dm *DagModifier) Size() (int64, error) {
pbn, err := ft.FromBytes(dm.curNode.Data)
if err != nil {
return 0, err
}
if dm.wrBuf != nil {
if uint64(dm.wrBuf.Len())+dm.writeStart > pbn.GetFilesize() {
return int64(dm.wrBuf.Len()) + int64(dm.writeStart), nil
}
}
return int64(pbn.GetFilesize()), nil
}
key, err := merkleNode.Key()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
hash := key.B58String()
output.Arguments[fpath] = hash
if _, ok := output.Objects[hash]; ok {
// duplicate argument for an already-listed node
continue
}
unixFSNode, err := unixfs.FromBytes(merkleNode.Data)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
t := unixFSNode.GetType()
output.Objects[hash] = &LsObject{
Hash: key.String(),
Type: t.String(),
Size: unixFSNode.GetFilesize(),
}
switch t {
case unixfspb.Data_File:
// dagTruncate truncates the given node to 'size' and returns the modified Node
func dagTruncate(ctx context.Context, nd *mdag.Node, size uint64, ds mdag.DAGService) (*mdag.Node, error) {
if len(nd.Links) == 0 {
// TODO: this can likely be done without marshaling and remarshaling
pbn, err := ft.FromBytes(nd.Data)
if err != nil {
return nil, err
}
nd.Data = ft.WrapData(pbn.Data[:size])
return nd, nil
}
var cur uint64
end := 0
var modified *mdag.Node
ndata := new(ft.FSNode)
for i, lnk := range nd.Links {
child, err := lnk.GetNode(ctx, ds)
if err != nil {
return nil, err
}
childsize, err := ft.DataSize(child.Data)
if err != nil {
return nil, err
}
// found the child we want to cut
if size < cur+childsize {
nchild, err := dagTruncate(ctx, child, size-cur, ds)
if err != nil {
return nil, err
}
ndata.AddBlockSize(size - cur)
modified = nchild
end = i
break
}
cur += childsize
ndata.AddBlockSize(childsize)
}
_, err := ds.Add(modified)
if err != nil {
return nil, err
}
nd.Links = nd.Links[:end]
err = nd.AddNodeLinkClean("", modified)
if err != nil {
return nil, err
}
d, err := ndata.GetBytes()
if err != nil {
return nil, err
}
nd.Data = d
// invalidate cache and recompute serialized data
_, err = nd.Encoded(true)
if err != nil {
return nil, err
}
return nd, nil
}
// modifyDag writes the data in 'data' over the data in 'node' starting at 'offset'
// returns the new key of the passed in node and whether or not all the data in the reader
// has been consumed.
func (dm *DagModifier) modifyDag(node *mdag.Node, offset uint64, data io.Reader) (key.Key, bool, error) {
f, err := ft.FromBytes(node.Data)
if err != nil {
return "", false, err
}
// If we've reached a leaf node.
if len(node.Links) == 0 {
n, err := data.Read(f.Data[offset:])
if err != nil && err != io.EOF {
return "", false, err
}
// Update newly written node..
b, err := proto.Marshal(f)
if err != nil {
return "", false, err
}
nd := &mdag.Node{Data: b}
k, err := dm.dagserv.Add(nd)
if err != nil {
return "", false, err
}
// Hey look! we're done!
var done bool
if n < len(f.Data[offset:]) {
done = true
}
return k, done, nil
}
var cur uint64
var done bool
for i, bs := range f.GetBlocksizes() {
// We found the correct child to write into
if cur+bs > offset {
// Unpin block
ckey := key.Key(node.Links[i].Hash)
dm.mp.RemovePinWithMode(ckey, pin.Indirect)
child, err := node.Links[i].GetNode(dm.ctx, dm.dagserv)
if err != nil {
return "", false, err
}
k, sdone, err := dm.modifyDag(child, offset-cur, data)
if err != nil {
return "", false, err
}
// pin the new node
dm.mp.PinWithMode(k, pin.Indirect)
offset += bs
node.Links[i].Hash = mh.Multihash(k)
// Recache serialized node
_, err = node.Encoded(true)
if err != nil {
return "", false, err
}
if sdone {
// No more bytes to write!
done = true
break
}
offset = cur + bs
}
cur += bs
}
k, err := dm.dagserv.Add(node)
return k, done, err
}
dagnodes = append(dagnodes, dagnode)
}
output := make([]LsObject, len(req.Arguments()))
for i, dagnode := range dagnodes {
output[i] = LsObject{
Hash: paths[i],
Links: make([]LsLink, len(dagnode.Links)),
}
for j, link := range dagnode.Links {
link.Node, err = link.GetNode(req.Context(), node.DAG)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
d, err := unixfs.FromBytes(link.Node.Data)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
output[i].Links[j] = LsLink{
Name: link.Name,
Hash: link.Hash.B58String(),
Size: link.Size,
Type: d.GetType(),
}
}
}
res.SetOutput(&LsOutput{output})
},