func (fi *File) Open(flags int, sync bool) (FileDescriptor, error) {
fi.nodelk.Lock()
node := fi.node
fi.nodelk.Unlock()
switch flags {
case OpenReadOnly:
fi.desclock.RLock()
case OpenWriteOnly, OpenReadWrite:
fi.desclock.Lock()
default:
// TODO: support other modes
return nil, fmt.Errorf("mode not supported")
}
dmod, err := mod.NewDagModifier(context.TODO(), node, fi.dserv, chunk.DefaultSplitter)
if err != nil {
return nil, err
}
return &fileDescriptor{
inode: fi,
perms: flags,
sync: sync,
mod: dmod,
}, nil
}
// NewFile returns a NewFile object with the given parameters
func NewFile(name string, node *dag.Node, parent childCloser, dserv dag.DAGService) (*File, error) {
dmod, err := mod.NewDagModifier(context.Background(), node, dserv, chunk.DefaultSplitter)
if err != nil {
return nil, err
}
return &File{
dserv: dserv,
parent: parent,
name: name,
mod: dmod,
}, nil
}
// NewFile returns a NewFile object with the given parameters
func NewFile(name string, node *dag.Node, parent childCloser, fs *Filesystem) (*File, error) {
dmod, err := mod.NewDagModifier(context.Background(), node, fs.dserv, fs.pins.GetManual(), chunk.DefaultSplitter)
if err != nil {
return nil, err
}
return &File{
fs: fs,
parent: parent,
name: name,
mod: dmod,
}, nil
}
func (fi *File) Open(flags int, sync bool) (FileDescriptor, error) {
fi.nodelk.Lock()
node := fi.node
fi.nodelk.Unlock()
switch node := node.(type) {
case *dag.ProtoNode:
fsn, err := ft.FSNodeFromBytes(node.Data())
if err != nil {
return nil, err
}
switch fsn.Type {
default:
return nil, fmt.Errorf("unsupported fsnode type for 'file'")
case ft.TSymlink:
return nil, fmt.Errorf("symlinks not yet supported")
case ft.TFile, ft.TRaw:
// OK case
}
case *dag.RawNode:
// Ok as well.
}
switch flags {
case OpenReadOnly:
fi.desclock.RLock()
case OpenWriteOnly, OpenReadWrite:
fi.desclock.Lock()
default:
// TODO: support other modes
return nil, fmt.Errorf("mode not supported")
}
dmod, err := mod.NewDagModifier(context.TODO(), node, fi.dserv, chunk.DefaultSplitter)
if err != nil {
return nil, err
}
return &fileDescriptor{
inode: fi,
perms: flags,
sync: sync,
mod: dmod,
}, nil
}