Beispiel #1
0
func (f *fs) handleLookup(r *fuse.LookupRequest) {
	log.Println("Inside handleLookup")
	log.Printf("Running Lookup for %s", r.Name)
	log.Println(r)
	resp := &fuse.LookupResponse{}

	l, err := f.rpc.api.Lookup(f.getContext(), &pb.LookupRequest{Name: r.Name, Parent: uint64(r.Node)})

	if err != nil {
		log.Fatalf("Lookup failed(%s): %v", r.Name, err)
	}
	// If there is no name then it wasn't found
	if l.Name != r.Name {
		log.Printf("ENOENT Lookup(%s)", r.Name)
		r.RespondError(fuse.ENOENT)
		return
	}
	resp.Node = fuse.NodeID(l.Attr.Inode)
	copyAttr(&resp.Attr, l.Attr)
	// TODO: should we make these configureable?
	resp.Attr.Valid = 5 * time.Second
	resp.EntryValid = 5 * time.Second

	log.Println(resp)
	r.Respond(resp)
}
Beispiel #2
0
func (c *serveConn) saveNode(inode uint64, node Node) (id fuse.NodeID, gen uint64) {
	c.meta.Lock()
	defer c.meta.Unlock()

	var ref *NodeRef
	if nodeRef, ok := node.(nodeRef); ok {
		ref = nodeRef.nodeRef()

		if ref.id != 0 {
			// dropNode guarantees that NodeRef is zeroed at the same
			// time as the NodeID is removed from serveConn.node, as
			// guarded by c.meta; this means sn cannot be nil here
			sn := c.node[ref.id]
			sn.refs++
			return ref.id, ref.generation
		}
	}

	sn := &serveNode{inode: inode, node: node, refs: 1}
	if n := len(c.freeNode); n > 0 {
		id = c.freeNode[n-1]
		c.freeNode = c.freeNode[:n-1]
		c.node[id] = sn
		c.nodeGen++
	} else {
		id = fuse.NodeID(len(c.node))
		c.node = append(c.node, sn)
	}
	gen = c.nodeGen
	if ref != nil {
		ref.id = id
		ref.generation = gen
	}
	return
}
Beispiel #3
0
// Return a Dirent for all children of an inode, or ENOENT
func (sc *serveConn) lookup(req *fuse.LookupRequest) {
	inode := uint64(req.Header.Node)
	resp := &fuse.LookupResponse{}
	var err error
	file, err := sc.db.FileByInode(inode)
	if err != nil {
		fuse.Debug(fmt.Sprintf("FileByInode lookup failure for %d: %v", inode, err))
		req.RespondError(fuse.ENOENT)
		return
	}
	for _, cInode := range file.Children {
		cf, err := sc.db.FileByInode(cInode)
		if err != nil {
			fuse.Debug(fmt.Sprintf("FileByInode(%v): %v", cInode, err))
			req.RespondError(fuse.EIO)
			return
		}
		if cf.Title == req.Name {
			resp.Node = fuse.NodeID(cInode)
			resp.EntryValid = *driveMetadataLatency
			resp.Attr = sc.attrFromFile(*cf)
			fuse.Debug(fmt.Sprintf("Lookup(%v in %v): %v", req.Name, inode, cInode))
			req.Respond(resp)
			return
		}
	}
	fuse.Debug(fmt.Sprintf("Lookup(%v in %v): ENOENT", req.Name, inode))
	req.RespondError(fuse.ENOENT)
}
Beispiel #4
0
func (d Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, res *fuse.LookupResponse) (fs.Node, error) {
	log.Debug("Lookup(%s,%d,%s)", d.GetPath(), req.Node, req.Name)
	lock.Lock()
	defer lock.Unlock()

	node, err := d.lookup(ctx, req.Name)
	if err != nil {
		return nil, err
	}

	res.Node = fuse.NodeID(d.Fs.GenerateInode(uint64(req.Node), req.Name))
	return node, nil
}
Beispiel #5
0
func (f *fs) handleSymlink(r *fuse.SymlinkRequest) {
	log.Println("Inside handleSymlink")
	log.Println(r)
	resp := &fuse.SymlinkResponse{}
	symlink, err := f.rpc.api.Symlink(f.getContext(), &pb.SymlinkRequest{Parent: uint64(r.Node), Name: r.NewName, Target: r.Target, Uid: r.Uid, Gid: r.Gid})
	if err != nil {
		log.Fatalf("Symlink failed: %v", err)
	}
	resp.Node = fuse.NodeID(symlink.Attr.Inode)
	copyAttr(&resp.Attr, symlink.Attr)
	resp.Attr.Valid = 5 * time.Second
	resp.EntryValid = 5 * time.Second
	log.Println(resp)
	r.Respond(resp)
}
Beispiel #6
0
func (c *serveConn) saveNode(name string, node Node) (id fuse.NodeID, gen uint64, sn *serveNode) {
	sn = &serveNode{name: name, node: node}
	c.meta.Lock()
	if n := len(c.freeNode); n > 0 {
		id = c.freeNode[n-1]
		c.freeNode = c.freeNode[:n-1]
		c.node[id] = sn
		c.nodeGen++
	} else {
		id = fuse.NodeID(len(c.node))
		c.node = append(c.node, sn)
	}
	gen = c.nodeGen
	c.meta.Unlock()
	return
}
Beispiel #7
0
func (f *fs) handleCreate(r *fuse.CreateRequest) {
	log.Println("Inside handleCreate")
	log.Println(r)
	resp := &fuse.CreateResponse{}
	c, err := f.rpc.api.Create(f.getContext(), &pb.CreateRequest{Parent: uint64(r.Node), Name: r.Name, Attr: &pb.Attr{Uid: r.Uid, Gid: r.Gid, Mode: uint32(r.Mode)}})
	if err != nil {
		log.Fatalf("Failed to create file: %v", err)
	}
	resp.Node = fuse.NodeID(c.Attr.Inode)
	copyAttr(&resp.Attr, c.Attr)
	resp.EntryValid = 5 * time.Second
	resp.Attr.Valid = 5 * time.Second
	copyAttr(&resp.LookupResponse.Attr, c.Attr)
	resp.LookupResponse.EntryValid = 5 * time.Second
	resp.LookupResponse.Attr.Valid = 5 * time.Second
	r.Respond(resp)
}
// Creates a regular file in dir with the attributes supplied in req
func (dir *Directory) Create(req *fuse.CreateRequest, resp *fuse.CreateResponse, intr fs.Intr) (fs.Node, fs.Handle, fuse.Error) {
	if strings.Contains(req.Name, "@") {
		return nil, nil, fuse.EPERM
	}
	filesystem.Lock(dir)
	defer filesystem.Unlock(dir)
	util.P_out(req.String())
	rval := new(File)
	rval.InitFile(req.Name, req.Mode, dir)
	rval.Attrs.Gid = req.Gid
	rval.Attrs.Uid = req.Uid
	dir.setChild(rval)
	resp.Attr = rval.Attr()
	resp.Node = fuse.NodeID(rval.Attr().Inode)
	rval.dirty = true
	dir.dirty = true
	return rval, rval, nil
}
Beispiel #9
0
func (d *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (fusefs.Node, error) {
	if skipDirEntry(req.Name) {
		return nil, fuse.ENOENT
	}
	path := filepath.Join(d.path, req.Name)
	isDir := false
	defer trace(NewLookupOp(req, path, isDir))
	var st syscall.Stat_t
	if err := syscall.Lstat(path, &st); err != nil {
		return nil, fuse.ENOENT
	}
	resp.Attr = statToFuseAttr(st)
	resp.Node = fuse.NodeID(resp.Attr.Inode)
	// TODO: should we overwrite resp.EntryValid?
	// resp.EntryValid = time.Duration(500) * time.Millisecond
	if isDir = resp.Attr.Mode.IsDir(); isDir {
		return NewDir(d.path, req.Name, d.fs), nil
	}
	return NewFile(d.path, req.Name, d.fs), nil
}
Beispiel #10
0
func (sc *serveConn) mkdir(req *fuse.MkdirRequest) {
	if *readOnly {
		req.RespondError(fuse.EPERM)
		return
	}
	// TODO: if allow_other, require uid == invoking uid to allow writes
	pInode := uint64(req.Header.Node)
	pId, err := sc.db.FileIdForInode(pInode)
	if err != nil {
		debug.Printf("failed to get parent fileid: %v", err)
		req.RespondError(fuse.EIO)
		return
	}
	p := []*drive.ParentReference{&drive.ParentReference{Id: pId}}
	file := &drive.File{Title: req.Name, MimeType: driveFolderMimeType, Parents: p}
	file, err = sc.service.Files.Insert(file).Do()
	if err != nil {
		debug.Printf("Insert failed: %v", err)
		req.RespondError(fuse.EIO)
		return
	}
	debug.Printf("Child of %v created in drive: %+v", file.Parents[0].Id, file)
	f, err := sc.db.UpdateFile(nil, file)
	if err != nil {
		debug.Printf("failed to update levelDB for %v: %v", f.Id, err)
		// The write has happened to drive, but we failed to update the kernel.
		// The Changes API will update Fuse, and when the kernel metadata for
		// the parent directory expires, the new dir will become visible.
		req.RespondError(fuse.EIO)
		return
	}
	sc.db.FlushCachedInode(pInode)
	resp := &fuse.MkdirResponse{}
	resp.Node = fuse.NodeID(f.Inode)
	resp.EntryValid = *driveMetadataLatency
	resp.Attr.Valid = *driveMetadataLatency
	resp.Attr = sc.attrFromFile(*f)
	fuse.Debug(fmt.Sprintf("Mkdir(%v): %+v", req.Name, f))
	req.Respond(resp)
}
Beispiel #11
0
func (f *fs) handleMkdir(r *fuse.MkdirRequest) {
	log.Println("Inside handleMkdir")
	log.Println(r)
	resp := &fuse.MkdirResponse{}

	m, err := f.rpc.api.MkDir(f.getContext(), &pb.MkDirRequest{Name: r.Name, Parent: uint64(r.Node), Attr: &pb.Attr{Uid: r.Uid, Gid: r.Gid, Mode: uint32(r.Mode)}})
	if err != nil {
		log.Fatalf("Mkdir failed(%s): %v", r.Name, err)
	}
	// If the name is empty, then the dir already exists
	if m.Name != r.Name {
		log.Printf("EEXIST Mkdir(%s)", r.Name)
		r.RespondError(fuse.EEXIST)
		return
	}
	resp.Node = fuse.NodeID(m.Attr.Inode)
	copyAttr(&resp.Attr, m.Attr)
	resp.Attr.Valid = 5 * time.Second
	resp.EntryValid = 5 * time.Second

	log.Println(resp)
	r.Respond(resp)
}
Beispiel #12
0
func (c *Server) saveNode(inode uint64, node Node) (id fuse.NodeID, gen uint64) {
	c.meta.Lock()
	defer c.meta.Unlock()

	if id, ok := c.nodeRef[node]; ok {
		sn := c.node[id]
		sn.refs++
		return id, sn.generation
	}

	sn := &serveNode{inode: inode, node: node, refs: 1}
	if n := len(c.freeNode); n > 0 {
		id = c.freeNode[n-1]
		c.freeNode = c.freeNode[:n-1]
		c.node[id] = sn
		c.nodeGen++
	} else {
		id = fuse.NodeID(len(c.node))
		c.node = append(c.node, sn)
	}
	sn.generation = c.nodeGen
	c.nodeRef[node] = id
	return id, sn.generation
}
Beispiel #13
0
func (d dir) Lookup(name string, intr fs.Intr) (fs.Node, fuse.Error) {
	log.Printf("Lookup %q in Directory: %q\n%v\n", name, d.name, d)
	select {
	case <-intr:
		return nil, fuse.EINTR
	default:
	}
	newNodeID := fuse.NodeID(fs.GenerateDynamicInode(uint64(d.inode), name))

	switch d.contentType {
	default:
		return nil, nil
	case "commit":
		node, CommitErr := d.LookupCommit(name, intr, newNodeID)
		return node, CommitErr
	case "list":
		node, listErr := d.LookupList(name, intr, newNodeID)
		return node, listErr
	case "tag":
		node, tagErr := d.LookupTag(name, intr, newNodeID)
		return node, tagErr
	}

}
Beispiel #14
0
func generateInode(NodeID fuse.NodeID, name string) fuse.NodeID {
	return fuse.NodeID(fs.GenerateDynamicInode(uint64(NodeID), name))
}
Beispiel #15
0
// Create file in drive, allocate kernel filehandle for writes
func (sc *serveConn) create(req *fuse.CreateRequest) {
	if *readOnly && !req.Flags.IsReadOnly() {
		req.RespondError(fuse.EPERM)
		return
	}

	pInode := uint64(req.Header.Node)
	parent, err := sc.db.FileByInode(pInode)
	if err != nil {
		debug.Printf("failed to get parent file: %v", err)
		req.RespondError(fuse.EIO)
		return
	}
	p := &drive.ParentReference{Id: parent.Id}

	f := &drive.File{Title: req.Name}
	f.Parents = []*drive.ParentReference{p}
	f, err = sc.service.Files.Insert(f).Do()
	if err != nil {
		debug.Printf("Files.Insert(f).Do(): %v", err)
		req.RespondError(fuse.EIO)
		return
	}
	inode, err := sc.db.InodeForFileId(f.Id)
	if err != nil {
		debug.Printf("failed creating inode for %v: %v", req.Name, err)
		req.RespondError(fuse.EIO)
		return
	}

	r, w := io.Pipe() // plumbing between WriteRequest and Drive
	h := sc.allocHandle(fuse.NodeID(inode), w)

	go sc.updateInDrive(f, r)

	// Tell fuse and the OS about the file
	df, err := sc.db.UpdateFile(nil, f)
	if err != nil {
		debug.Printf("failed to update levelDB for %v: %v", f.Id, err)
		// The write has happened to drive, but we failed to update the kernel.
		// The Changes API will update Fuse, and when the kernel metadata for
		// the parent directory expires, the new file will become visible.
		req.RespondError(fuse.EIO)
		return
	}

	resp := fuse.CreateResponse{
		// describes the opened handle
		OpenResponse: fuse.OpenResponse{
			Handle: fuse.HandleID(h),
			Flags:  fuse.OpenNonSeekable,
		},
		// describes the created file
		LookupResponse: fuse.LookupResponse{
			Node:       fuse.NodeID(inode),
			EntryValid: *driveMetadataLatency,
			Attr:       sc.attrFromFile(*df),
		},
	}
	fuse.Debug(fmt.Sprintf("Create(%v in %v): %+v", req.Name, parent.Title, resp))

	req.Respond(&resp)
}
Beispiel #16
0
func (c *serveConn) serve(fs FS, r fuse.Request) {
	intr := make(Intr)
	req := &serveRequest{Request: r, Intr: intr}

	fuse.Debugf("<- %s", req)
	var node Node
	var snode *serveNode
	c.meta.Lock()
	hdr := r.Hdr()
	if id := hdr.Node; id != 0 {
		if id < fuse.NodeID(len(c.node)) {
			snode = c.node[uint(id)]
		}
		if snode == nil {
			c.meta.Unlock()
			println("missing node", id, len(c.node), snode)
			fuse.Debugf("-> %#x %v", hdr.ID, fuse.ESTALE)
			r.RespondError(fuse.ESTALE)
			return
		}
		node = snode.node
	}
	if c.req[hdr.ID] != nil {
		// This happens with OSXFUSE.  Assume it's okay and
		// that we'll never see an interrupt for this one.
		// Otherwise everything wedges.  TODO: Report to OSXFUSE?
		intr = nil
	} else {
		c.req[hdr.ID] = req
	}
	c.meta.Unlock()

	// Call this before responding.
	// After responding is too late: we might get another request
	// with the same ID and be very confused.
	done := func(resp interface{}) {
		fuse.Debugf("-> %#x %v", hdr.ID, resp)
		c.meta.Lock()
		c.req[hdr.ID] = nil
		c.meta.Unlock()
	}

	switch r := r.(type) {
	default:
		// Note: To FUSE, ENOSYS means "this server never implements this request."
		// It would be inappropriate to return ENOSYS for other operations in this
		// switch that might only be unavailable in some contexts, not all.
		done(fuse.ENOSYS)
		r.RespondError(fuse.ENOSYS)

	// FS operations.
	case *fuse.InitRequest:
		s := &fuse.InitResponse{
			MaxWrite: 4096,
		}
		if fs, ok := fs.(FSIniter); ok {
			if err := fs.Init(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(s)
		r.Respond(s)

	case *fuse.StatfsRequest:
		s := &fuse.StatfsResponse{}
		if fs, ok := fs.(FSStatfser); ok {
			if err := fs.Statfs(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(s)
		r.Respond(s)

	// Node operations.
	case *fuse.GetattrRequest:
		s := &fuse.GetattrResponse{}
		if n, ok := node.(NodeGetattrer); ok {
			if err := n.Getattr(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		} else {
			s.AttrValid = 1 * time.Minute
			s.Attr = snode.attr()
		}
		done(s)
		r.Respond(s)

	case *fuse.SetattrRequest:
		s := &fuse.SetattrResponse{}

		// Special-case truncation, if no other bits are set
		// and the open Handles all have a WriteAll method.
		//
		// TODO WriteAll mishandles all kinds of cases, e.g.
		// truncating to non-zero size, noncontiguous writes, etc
		if r.Valid.Size() && r.Size == 0 {
			type writeAll interface {
				WriteAll([]byte, Intr) fuse.Error
			}
			switch r.Valid {
			case fuse.SetattrLockOwner | fuse.SetattrSize, fuse.SetattrSize:
				// Seen on Linux. Handle isn't set.
				c.meta.Lock()
				// it is not safe to assume any handles are open for
				// this node; calls to truncate(2) can happen at any
				// time
				if len(c.nodeHandles) > int(hdr.Node) {
					for hid := range c.nodeHandles[hdr.Node] {
						shandle := c.handle[hid]
						if _, ok := shandle.handle.(writeAll); ok {
							shandle.trunc = true
						}
					}
				}
				c.meta.Unlock()
			case fuse.SetattrHandle | fuse.SetattrSize:
				// Seen on OS X; the Handle is provided.
				shandle := c.getHandle(r.Handle)
				if shandle == nil {
					fuse.Debugf("-> %#x %v", hdr.ID, fuse.ESTALE)
					r.RespondError(fuse.ESTALE)
					return
				}
				if _, ok := shandle.handle.(writeAll); ok {
					shandle.trunc = true
				}
			}
		}

		log.Printf("setattr %v", r)
		if n, ok := node.(NodeSetattrer); ok {
			if err := n.Setattr(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
			done(s)
			r.Respond(s)
			break
		}

		if s.AttrValid == 0 {
			s.AttrValid = 1 * time.Minute
		}
		s.Attr = snode.attr()
		done(s)
		r.Respond(s)

	case *fuse.SymlinkRequest:
		s := &fuse.SymlinkResponse{}
		n, ok := node.(NodeSymlinker)
		if !ok {
			done(fuse.EIO) // XXX or EPERM like Mkdir?
			r.RespondError(fuse.EIO)
			break
		}
		n2, err := n.Symlink(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		c.saveLookup(&s.LookupResponse, snode, r.NewName, n2)
		done(s)
		r.Respond(s)

	case *fuse.ReadlinkRequest:
		n, ok := node.(NodeReadlinker)
		if !ok {
			done(fuse.EIO) /// XXX or EPERM?
			r.RespondError(fuse.EIO)
			break
		}
		target, err := n.Readlink(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(target)
		r.Respond(target)

	case *fuse.LinkRequest:
		n, ok := node.(NodeLinker)
		if !ok {
			log.Printf("Node %T doesn't implement fuse Link", node)
			done(fuse.EIO) /// XXX or EPERM?
			r.RespondError(fuse.EIO)
			break
		}
		c.meta.Lock()
		var oldNode *serveNode
		if int(r.OldNode) < len(c.node) {
			oldNode = c.node[r.OldNode]
		}
		c.meta.Unlock()
		if oldNode == nil {
			log.Printf("In LinkRequest, node %d not found", r.OldNode)
			done(fuse.EIO)
			r.RespondError(fuse.EIO)
			break
		}
		n2, err := n.Link(r, oldNode.node, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		s := &fuse.LookupResponse{}
		c.saveLookup(s, snode, r.NewName, n2)
		done(s)
		r.Respond(s)

	case *fuse.RemoveRequest:
		n, ok := node.(NodeRemover)
		if !ok {
			done(fuse.EIO) /// XXX or EPERM?
			r.RespondError(fuse.EIO)
			break
		}
		err := n.Remove(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(nil)
		r.Respond()

	case *fuse.AccessRequest:
		if n, ok := node.(NodeAccesser); ok {
			if err := n.Access(r, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(r)
		r.Respond()

	case *fuse.LookupRequest:
		var n2 Node
		var err fuse.Error
		s := &fuse.LookupResponse{}
		if n, ok := node.(NodeStringLookuper); ok {
			n2, err = n.Lookup(r.Name, intr)
		} else if n, ok := node.(NodeRequestLookuper); ok {
			n2, err = n.Lookup(r, s, intr)
		} else {
			done(fuse.ENOENT)
			r.RespondError(fuse.ENOENT)
			break
		}
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		c.saveLookup(s, snode, r.Name, n2)
		done(s)
		r.Respond(s)

	case *fuse.MkdirRequest:
		s := &fuse.MkdirResponse{}
		n, ok := node.(NodeMkdirer)
		if !ok {
			done(fuse.EPERM)
			r.RespondError(fuse.EPERM)
			break
		}
		n2, err := n.Mkdir(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		c.saveLookup(&s.LookupResponse, snode, r.Name, n2)
		done(s)
		r.Respond(s)

	case *fuse.OpenRequest:
		s := &fuse.OpenResponse{Flags: fuse.OpenDirectIO}
		var h2 Handle
		if n, ok := node.(NodeOpener); ok {
			hh, err := n.Open(r, s, intr)
			if err != nil {
				done(err)
				r.RespondError(err)
				break
			}
			h2 = hh
		} else {
			h2 = node
		}
		s.Handle, _ = c.saveHandle(h2, hdr.Node)
		done(s)
		r.Respond(s)

	case *fuse.CreateRequest:
		n, ok := node.(NodeCreater)
		if !ok {
			// If we send back ENOSYS, FUSE will try mknod+open.
			done(fuse.EPERM)
			r.RespondError(fuse.EPERM)
			break
		}
		s := &fuse.CreateResponse{OpenResponse: fuse.OpenResponse{Flags: fuse.OpenDirectIO}}
		n2, h2, err := n.Create(r, s, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		c.saveLookup(&s.LookupResponse, snode, r.Name, n2)
		h, shandle := c.saveHandle(h2, hdr.Node)
		s.Handle = h
		type writeAll interface {
			WriteAll([]byte, Intr) fuse.Error
		}
		if _, ok := shandle.handle.(writeAll); ok {
			shandle.trunc = true
		}
		done(s)
		r.Respond(s)

	case *fuse.GetxattrRequest, *fuse.SetxattrRequest, *fuse.ListxattrRequest, *fuse.RemovexattrRequest:
		// TODO: Use n.
		done(fuse.ENOSYS)
		r.RespondError(fuse.ENOSYS)

	case *fuse.ForgetRequest:
		n, ok := node.(NodeForgetter)
		if ok {
			n.Forget()
		}
		c.dropNode(hdr.Node)
		done(r)
		r.Respond()

	// Handle operations.
	case *fuse.ReadRequest:
		shandle := c.getHandle(r.Handle)
		if shandle == nil {
			fuse.Debugf("-> %#x %v", hdr.ID, fuse.ESTALE)
			r.RespondError(fuse.ESTALE)
			return
		}
		handle := shandle.handle

		s := &fuse.ReadResponse{Data: make([]byte, 0, r.Size)}
		if r.Dir {
			if h, ok := handle.(HandleReadDirer); ok {
				if shandle.readData == nil {
					dirs, err := h.ReadDir(intr)
					if err != nil {
						done(err)
						r.RespondError(err)
						break
					}
					var data []byte
					for _, dir := range dirs {
						if dir.Inode == 0 {
							dir.Inode = hash(path.Join(snode.name, dir.Name))
						}
						data = fuse.AppendDirent(data, dir)
					}
					shandle.readData = data
				}
				fuseutil.HandleRead(r, s, shandle.readData)
				done(s)
				r.Respond(s)
				break
			}
		} else {
			if h, ok := handle.(HandleReadAller); ok {
				if shandle.readData == nil {
					data, err := h.ReadAll(intr)
					if err != nil {
						done(err)
						r.RespondError(err)
						break
					}
					if data == nil {
						data = []byte{}
					}
					shandle.readData = data
				}
				fuseutil.HandleRead(r, s, shandle.readData)
				done(s)
				r.Respond(s)
				break
			}
			h, ok := handle.(HandleReader)
			if !ok {
				fmt.Printf("NO READ FOR %T\n", handle)
				done(fuse.EIO)
				r.RespondError(fuse.EIO)
				break
			}
			if err := h.Read(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(s)
		r.Respond(s)

	case *fuse.WriteRequest:
		shandle := c.getHandle(r.Handle)
		if shandle == nil {
			fuse.Debugf("-> %#x %v", hdr.ID, fuse.ESTALE)
			r.RespondError(fuse.ESTALE)
			return
		}

		s := &fuse.WriteResponse{}
		if shandle.trunc && r.Offset == int64(len(shandle.writeData)) {
			shandle.writeData = append(shandle.writeData, r.Data...)
			s.Size = len(r.Data)
			done(s)
			r.Respond(s)
			break
		}
		if h, ok := shandle.handle.(HandleWriter); ok {
			if err := h.Write(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
			done(s)
			r.Respond(s)
			break
		}
		println("NO WRITE")
		done(fuse.EIO)
		r.RespondError(fuse.EIO)

	case *fuse.FlushRequest:
		shandle := c.getHandle(r.Handle)
		if shandle == nil {
			fuse.Debugf("-> %#x %v", hdr.ID, fuse.ESTALE)
			r.RespondError(fuse.ESTALE)
			return
		}
		handle := shandle.handle

		if shandle.trunc {
			h := handle.(HandleWriteAller)
			if err := h.WriteAll(shandle.writeData, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
			shandle.writeData = nil
			shandle.trunc = false
		}
		if h, ok := handle.(HandleFlusher); ok {
			if err := h.Flush(r, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(nil)
		r.Respond()

	case *fuse.ReleaseRequest:
		shandle := c.getHandle(r.Handle)
		if shandle == nil {
			fuse.Debugf("-> %#x %v", hdr.ID, fuse.ESTALE)
			r.RespondError(fuse.ESTALE)
			return
		}
		handle := shandle.handle

		// No matter what, release the handle.
		c.dropHandle(r.Handle)

		if h, ok := handle.(HandleReleaser); ok {
			if err := h.Release(r, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(nil)
		r.Respond()

	case *fuse.DestroyRequest:
		if fs, ok := fs.(FSDestroyer); ok {
			fs.Destroy()
		}
		done(nil)
		r.Respond()

	case *fuse.RenameRequest:
		c.meta.Lock()
		var newDirNode *serveNode
		if int(r.NewDir) < len(c.node) {
			newDirNode = c.node[r.NewDir]
		}
		c.meta.Unlock()
		if newDirNode == nil {
			println("RENAME NEW DIR NODE NOT FOUND")
			done(fuse.EIO)
			r.RespondError(fuse.EIO)
			break
		}
		n, ok := node.(NodeRenamer)
		if !ok {
			log.Printf("Node %T missing Rename method", node)
			done(fuse.EIO) // XXX or EPERM like Mkdir?
			r.RespondError(fuse.EIO)
			break
		}
		err := n.Rename(r, newDirNode.node, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(nil)
		r.Respond()

	case *fuse.MknodRequest:
		n, ok := node.(NodeMknoder)
		if !ok {
			log.Printf("Node %T missing Mknod method", node)
			done(fuse.EIO)
			r.RespondError(fuse.EIO)
			break
		}
		n2, err := n.Mknod(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		s := &fuse.LookupResponse{}
		c.saveLookup(s, snode, r.Name, n2)
		done(s)
		r.Respond(s)

	case *fuse.FsyncRequest:
		n, ok := node.(NodeFsyncer)
		if !ok {
			log.Printf("Node %T missing Fsync method", node)
			done(fuse.EIO)
			r.RespondError(fuse.EIO)
			break
		}
		err := n.Fsync(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(nil)
		r.Respond()

	case *fuse.InterruptRequest:
		c.meta.Lock()
		ireq := c.req[r.IntrID]
		if ireq != nil && ireq.Intr != nil {
			close(ireq.Intr)
			ireq.Intr = nil
		}
		c.meta.Unlock()
		done(nil)
		r.Respond()

		/*	case *FsyncdirRequest:
				done(ENOSYS)
				r.RespondError(ENOSYS)

			case *GetlkRequest, *SetlkRequest, *SetlkwRequest:
				done(ENOSYS)
				r.RespondError(ENOSYS)

			case *BmapRequest:
				done(ENOSYS)
				r.RespondError(ENOSYS)

			case *SetvolnameRequest, *GetxtimesRequest, *ExchangeRequest:
				done(ENOSYS)
				r.RespondError(ENOSYS)
		*/
	}
}
Beispiel #17
0
func (c *Server) serve(r fuse.Request) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	parentCtx := ctx
	if c.context != nil {
		ctx = c.context(ctx, r)
	}

	req := &serveRequest{Request: r, cancel: cancel}

	c.debug(request{
		Op:      opName(r),
		Request: r.Hdr(),
		In:      r,
	})
	var node Node
	var snode *serveNode
	c.meta.Lock()
	hdr := r.Hdr()
	if id := hdr.Node; id != 0 {
		if id < fuse.NodeID(len(c.node)) {
			snode = c.node[uint(id)]
		}
		if snode == nil {
			c.meta.Unlock()
			c.debug(response{
				Op:      opName(r),
				Request: logResponseHeader{ID: hdr.ID},
				Error:   fuse.ESTALE.ErrnoName(),
				// this is the only place that sets both Error and
				// Out; not sure if i want to do that; might get rid
				// of len(c.node) things altogether
				Out: logMissingNode{
					MaxNode: fuse.NodeID(len(c.node)),
				},
			})
			r.RespondError(fuse.ESTALE)
			return
		}
		node = snode.node
	}
	if c.req[hdr.ID] != nil {
		// This happens with OSXFUSE.  Assume it's okay and
		// that we'll never see an interrupt for this one.
		// Otherwise everything wedges.  TODO: Report to OSXFUSE?
		//
		// TODO this might have been because of missing done() calls
	} else {
		c.req[hdr.ID] = req
	}
	c.meta.Unlock()

	// Call this before responding.
	// After responding is too late: we might get another request
	// with the same ID and be very confused.
	done := func(resp interface{}) {
		msg := response{
			Op:      opName(r),
			Request: logResponseHeader{ID: hdr.ID},
		}
		if err, ok := resp.(error); ok {
			msg.Error = err.Error()
			if ferr, ok := err.(fuse.ErrorNumber); ok {
				errno := ferr.Errno()
				msg.Errno = errno.ErrnoName()
				if errno == err {
					// it's just a fuse.Errno with no extra detail;
					// skip the textual message for log readability
					msg.Error = ""
				}
			} else {
				msg.Errno = fuse.DefaultErrno.ErrnoName()
			}
		} else {
			msg.Out = resp
		}
		c.debug(msg)

		c.meta.Lock()
		delete(c.req, hdr.ID)
		c.meta.Unlock()
	}

	var responded bool
	defer func() {
		if rec := recover(); rec != nil {
			const size = 1 << 16
			buf := make([]byte, size)
			n := runtime.Stack(buf, false)
			buf = buf[:n]
			log.Printf("fuse: panic in handler for %v: %v\n%s", r, rec, buf)
			err := handlerPanickedError{
				Request: r,
				Err:     rec,
			}
			done(err)
			r.RespondError(err)
			return
		}

		if !responded {
			err := handlerTerminatedError{
				Request: r,
			}
			done(err)
			r.RespondError(err)
		}
	}()

	if err := c.handleRequest(ctx, node, snode, r, done); err != nil {
		if err == context.Canceled {
			select {
			case <-parentCtx.Done():
				// We canceled the parent context because of an
				// incoming interrupt request, so return EINTR
				// to trigger the right behavior in the client app.
				//
				// Only do this when it's the parent context that was
				// canceled, not a context controlled by the program
				// using this library, so we don't return EINTR too
				// eagerly -- it might cause busy loops.
				//
				// Decent write-up on role of EINTR:
				// http://250bpm.com/blog:12
				err = fuse.EINTR
			default:
				// nothing
			}
		}
		done(err)
		r.RespondError(err)
	}

	// disarm runtime.Goexit protection
	responded = true
}
Beispiel #18
0
func (c *serveConn) serve(r fuse.Request) {
	intr := make(Intr)
	req := &serveRequest{Request: r, Intr: intr}

	c.debug(request{
		Op:      opName(r),
		Request: r.Hdr(),
		In:      r,
	})
	var node Node
	var snode *serveNode
	c.meta.Lock()
	hdr := r.Hdr()
	if id := hdr.Node; id != 0 {
		if id < fuse.NodeID(len(c.node)) {
			snode = c.node[uint(id)]
		}
		if snode == nil {
			c.meta.Unlock()
			c.debug(response{
				Op:      opName(r),
				Request: logResponseHeader{ID: hdr.ID},
				Error:   fuse.ESTALE.ErrnoName(),
				// this is the only place that sets both Error and
				// Out; not sure if i want to do that; might get rid
				// of len(c.node) things altogether
				Out: logMissingNode{
					MaxNode: fuse.NodeID(len(c.node)),
				},
			})
			r.RespondError(fuse.ESTALE)
			return
		}
		node = snode.node
	}
	if c.req[hdr.ID] != nil {
		// This happens with OSXFUSE.  Assume it's okay and
		// that we'll never see an interrupt for this one.
		// Otherwise everything wedges.  TODO: Report to OSXFUSE?
		//
		// TODO this might have been because of missing done() calls
		intr = nil
	} else {
		c.req[hdr.ID] = req
	}
	c.meta.Unlock()

	// Call this before responding.
	// After responding is too late: we might get another request
	// with the same ID and be very confused.
	done := func(resp interface{}) {
		msg := response{
			Op:      opName(r),
			Request: logResponseHeader{ID: hdr.ID},
		}
		if err, ok := resp.(error); ok {
			msg.Error = err.Error()
			if ferr, ok := err.(fuse.ErrorNumber); ok {
				errno := ferr.Errno()
				msg.Errno = errno.ErrnoName()
				if errno == err {
					// it's just a fuse.Errno with no extra detail;
					// skip the textual message for log readability
					msg.Error = ""
				}
			} else {
				msg.Errno = fuse.DefaultErrno.ErrnoName()
			}
		} else {
			msg.Out = resp
		}
		c.debug(msg)

		c.meta.Lock()
		delete(c.req, hdr.ID)
		c.meta.Unlock()
	}

	switch r := r.(type) {
	default:
		// Note: To FUSE, ENOSYS means "this server never implements this request."
		// It would be inappropriate to return ENOSYS for other operations in this
		// switch that might only be unavailable in some contexts, not all.
		done(fuse.ENOSYS)
		r.RespondError(fuse.ENOSYS)

	// FS operations.
	case *fuse.InitRequest:
		s := &fuse.InitResponse{
			MaxWrite: 128 * 1024,
			Flags:    fuse.InitBigWrites,
		}
		if fs, ok := c.fs.(FSIniter); ok {
			if err := fs.Init(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(s)
		r.Respond(s)

	case *fuse.StatfsRequest:
		s := &fuse.StatfsResponse{}
		if fs, ok := c.fs.(FSStatfser); ok {
			if err := fs.Statfs(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(s)
		r.Respond(s)

	// Node operations.
	case *fuse.GetattrRequest:
		s := &fuse.GetattrResponse{}
		if n, ok := node.(NodeGetattrer); ok {
			if err := n.Getattr(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		} else {
			s.AttrValid = attrValidTime
			s.Attr = snode.attr()
		}
		done(s)
		r.Respond(s)

	case *fuse.SetattrRequest:
		s := &fuse.SetattrResponse{}
		if n, ok := node.(NodeSetattrer); ok {
			if err := n.Setattr(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
			done(s)
			r.Respond(s)
			break
		}

		if s.AttrValid == 0 {
			s.AttrValid = attrValidTime
		}
		s.Attr = snode.attr()
		done(s)
		r.Respond(s)

	case *fuse.SymlinkRequest:
		s := &fuse.SymlinkResponse{}
		n, ok := node.(NodeSymlinker)
		if !ok {
			done(fuse.EIO) // XXX or EPERM like Mkdir?
			r.RespondError(fuse.EIO)
			break
		}
		n2, err := n.Symlink(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		c.saveLookup(&s.LookupResponse, snode, r.NewName, n2)
		done(s)
		r.Respond(s)

	case *fuse.ReadlinkRequest:
		n, ok := node.(NodeReadlinker)
		if !ok {
			done(fuse.EIO) /// XXX or EPERM?
			r.RespondError(fuse.EIO)
			break
		}
		target, err := n.Readlink(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(target)
		r.Respond(target)

	case *fuse.LinkRequest:
		n, ok := node.(NodeLinker)
		if !ok {
			done(fuse.EIO) /// XXX or EPERM?
			r.RespondError(fuse.EIO)
			break
		}
		c.meta.Lock()
		var oldNode *serveNode
		if int(r.OldNode) < len(c.node) {
			oldNode = c.node[r.OldNode]
		}
		c.meta.Unlock()
		if oldNode == nil {
			c.debug(logLinkRequestOldNodeNotFound{
				Request: r.Hdr(),
				In:      r,
			})
			done(fuse.EIO)
			r.RespondError(fuse.EIO)
			break
		}
		n2, err := n.Link(r, oldNode.node, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		s := &fuse.LookupResponse{}
		c.saveLookup(s, snode, r.NewName, n2)
		done(s)
		r.Respond(s)

	case *fuse.RemoveRequest:
		n, ok := node.(NodeRemover)
		if !ok {
			done(fuse.EIO) /// XXX or EPERM?
			r.RespondError(fuse.EIO)
			break
		}
		err := n.Remove(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(nil)
		r.Respond()

	case *fuse.AccessRequest:
		if n, ok := node.(NodeAccesser); ok {
			if err := n.Access(r, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(nil)
		r.Respond()

	case *fuse.LookupRequest:
		var n2 Node
		var err fuse.Error
		s := &fuse.LookupResponse{}
		if n, ok := node.(NodeStringLookuper); ok {
			n2, err = n.Lookup(r.Name, intr)
		} else if n, ok := node.(NodeRequestLookuper); ok {
			n2, err = n.Lookup(r, s, intr)
		} else {
			done(fuse.ENOENT)
			r.RespondError(fuse.ENOENT)
			break
		}
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		c.saveLookup(s, snode, r.Name, n2)
		done(s)
		r.Respond(s)

	case *fuse.MkdirRequest:
		s := &fuse.MkdirResponse{}
		n, ok := node.(NodeMkdirer)
		if !ok {
			done(fuse.EPERM)
			r.RespondError(fuse.EPERM)
			break
		}
		n2, err := n.Mkdir(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		c.saveLookup(&s.LookupResponse, snode, r.Name, n2)
		done(s)
		r.Respond(s)

	case *fuse.OpenRequest:
		s := &fuse.OpenResponse{}
		var h2 Handle
		if n, ok := node.(NodeOpener); ok {
			hh, err := n.Open(r, s, intr)
			if err != nil {
				done(err)
				r.RespondError(err)
				break
			}
			h2 = hh
		} else {
			h2 = node
		}
		s.Handle = c.saveHandle(h2, hdr.Node)
		done(s)
		r.Respond(s)

	case *fuse.CreateRequest:
		n, ok := node.(NodeCreater)
		if !ok {
			// If we send back ENOSYS, FUSE will try mknod+open.
			done(fuse.EPERM)
			r.RespondError(fuse.EPERM)
			break
		}
		s := &fuse.CreateResponse{OpenResponse: fuse.OpenResponse{}}
		n2, h2, err := n.Create(r, s, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		c.saveLookup(&s.LookupResponse, snode, r.Name, n2)
		s.Handle = c.saveHandle(h2, hdr.Node)
		done(s)
		r.Respond(s)

	case *fuse.GetxattrRequest:
		n, ok := node.(NodeGetxattrer)
		if !ok {
			done(fuse.ENOTSUP)
			r.RespondError(fuse.ENOTSUP)
			break
		}
		s := &fuse.GetxattrResponse{}
		err := n.Getxattr(r, s, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		if r.Size != 0 && uint64(len(s.Xattr)) > uint64(r.Size) {
			done(fuse.ERANGE)
			r.RespondError(fuse.ERANGE)
			break
		}
		done(s)
		r.Respond(s)

	case *fuse.ListxattrRequest:
		n, ok := node.(NodeListxattrer)
		if !ok {
			done(fuse.ENOTSUP)
			r.RespondError(fuse.ENOTSUP)
			break
		}
		s := &fuse.ListxattrResponse{}
		err := n.Listxattr(r, s, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		if r.Size != 0 && uint64(len(s.Xattr)) > uint64(r.Size) {
			done(fuse.ERANGE)
			r.RespondError(fuse.ERANGE)
			break
		}
		done(s)
		r.Respond(s)

	case *fuse.SetxattrRequest:
		n, ok := node.(NodeSetxattrer)
		if !ok {
			done(fuse.ENOTSUP)
			r.RespondError(fuse.ENOTSUP)
			break
		}
		err := n.Setxattr(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(nil)
		r.Respond()

	case *fuse.RemovexattrRequest:
		n, ok := node.(NodeRemovexattrer)
		if !ok {
			done(fuse.ENOTSUP)
			r.RespondError(fuse.ENOTSUP)
			break
		}
		err := n.Removexattr(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(nil)
		r.Respond()

	case *fuse.ForgetRequest:
		forget := c.dropNode(hdr.Node, r.N)
		if forget {
			n, ok := node.(NodeForgetter)
			if ok {
				n.Forget()
			}
		}
		done(nil)
		r.Respond()

	// Handle operations.
	case *fuse.ReadRequest:
		shandle := c.getHandle(r.Handle)
		if shandle == nil {
			done(fuse.ESTALE)
			r.RespondError(fuse.ESTALE)
			return
		}
		handle := shandle.handle

		s := &fuse.ReadResponse{Data: make([]byte, 0, r.Size)}
		if r.Dir {
			if h, ok := handle.(HandleReadDirer); ok {
				if shandle.readData == nil {
					dirs, err := h.ReadDir(intr)
					if err != nil {
						done(err)
						r.RespondError(err)
						break
					}
					var data []byte
					for _, dir := range dirs {
						if dir.Inode == 0 {
							dir.Inode = c.dynamicInode(snode.inode, dir.Name)
						}
						data = fuse.AppendDirent(data, dir)
					}
					shandle.readData = data
				}
				fuseutil.HandleRead(r, s, shandle.readData)
				done(s)
				r.Respond(s)
				break
			}
		} else {
			if h, ok := handle.(HandleReadAller); ok {
				if shandle.readData == nil {
					data, err := h.ReadAll(intr)
					if err != nil {
						done(err)
						r.RespondError(err)
						break
					}
					if data == nil {
						data = []byte{}
					}
					shandle.readData = data
				}
				fuseutil.HandleRead(r, s, shandle.readData)
				done(s)
				r.Respond(s)
				break
			}
			h, ok := handle.(HandleReader)
			if !ok {
				fmt.Printf("NO READ FOR %T\n", handle)
				done(fuse.EIO)
				r.RespondError(fuse.EIO)
				break
			}
			if err := h.Read(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(s)
		r.Respond(s)

	case *fuse.WriteRequest:
		shandle := c.getHandle(r.Handle)
		if shandle == nil {
			done(fuse.ESTALE)
			r.RespondError(fuse.ESTALE)
			return
		}

		s := &fuse.WriteResponse{}
		if h, ok := shandle.handle.(HandleWriter); ok {
			if err := h.Write(r, s, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
			done(s)
			r.Respond(s)
			break
		}
		done(fuse.EIO)
		r.RespondError(fuse.EIO)

	case *fuse.FlushRequest:
		shandle := c.getHandle(r.Handle)
		if shandle == nil {
			done(fuse.ESTALE)
			r.RespondError(fuse.ESTALE)
			return
		}
		handle := shandle.handle

		if h, ok := handle.(HandleFlusher); ok {
			if err := h.Flush(r, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(nil)
		r.Respond()

	case *fuse.ReleaseRequest:
		shandle := c.getHandle(r.Handle)
		if shandle == nil {
			done(fuse.ESTALE)
			r.RespondError(fuse.ESTALE)
			return
		}
		handle := shandle.handle

		// No matter what, release the handle.
		c.dropHandle(r.Handle)

		if h, ok := handle.(HandleReleaser); ok {
			if err := h.Release(r, intr); err != nil {
				done(err)
				r.RespondError(err)
				break
			}
		}
		done(nil)
		r.Respond()

	case *fuse.DestroyRequest:
		if fs, ok := c.fs.(FSDestroyer); ok {
			fs.Destroy()
		}
		done(nil)
		r.Respond()

	case *fuse.RenameRequest:
		c.meta.Lock()
		var newDirNode *serveNode
		if int(r.NewDir) < len(c.node) {
			newDirNode = c.node[r.NewDir]
		}
		c.meta.Unlock()
		if newDirNode == nil {
			c.debug(renameNewDirNodeNotFound{
				Request: r.Hdr(),
				In:      r,
			})
			done(fuse.EIO)
			r.RespondError(fuse.EIO)
			break
		}
		n, ok := node.(NodeRenamer)
		if !ok {
			done(fuse.EIO) // XXX or EPERM like Mkdir?
			r.RespondError(fuse.EIO)
			break
		}
		err := n.Rename(r, newDirNode.node, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(nil)
		r.Respond()

	case *fuse.MknodRequest:
		n, ok := node.(NodeMknoder)
		if !ok {
			done(fuse.EIO)
			r.RespondError(fuse.EIO)
			break
		}
		n2, err := n.Mknod(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		s := &fuse.LookupResponse{}
		c.saveLookup(s, snode, r.Name, n2)
		done(s)
		r.Respond(s)

	case *fuse.FsyncRequest:
		n, ok := node.(NodeFsyncer)
		if !ok {
			done(fuse.EIO)
			r.RespondError(fuse.EIO)
			break
		}
		err := n.Fsync(r, intr)
		if err != nil {
			done(err)
			r.RespondError(err)
			break
		}
		done(nil)
		r.Respond()

	case *fuse.InterruptRequest:
		c.meta.Lock()
		ireq := c.req[r.IntrID]
		if ireq != nil && ireq.Intr != nil {
			close(ireq.Intr)
			ireq.Intr = nil
		}
		c.meta.Unlock()
		done(nil)
		r.Respond()

		/*	case *FsyncdirRequest:
				done(ENOSYS)
				r.RespondError(ENOSYS)

			case *GetlkRequest, *SetlkRequest, *SetlkwRequest:
				done(ENOSYS)
				r.RespondError(ENOSYS)

			case *BmapRequest:
				done(ENOSYS)
				r.RespondError(ENOSYS)

			case *SetvolnameRequest, *GetxtimesRequest, *ExchangeRequest:
				done(ENOSYS)
				r.RespondError(ENOSYS)
		*/
	}
}
Beispiel #19
0
func (d dir) LookupCommit(name string, intr fs.Intr, nodeID fuse.NodeID) (fs.Node, fuse.Error) {
	select {
	case <-intr:
		return nil, fuse.EINTR
	default:

	}
	ino := fuse.NodeID(1)
	if d.parent != nil {
		ino = generateInode(d.parent.inode, name)
	}
	c, CommitErr := services.GetCommit(d.leaf.(objects.HKID))

	if CommitErr != nil {
		return nil, fuse.EIO
		/*
			log.Printf("commit %s:", CommitErr)
			_, err := services.GetKey(d.leaf.(objects.HKID))
			perm := os.FileMode(0555)
			if err == nil {
				perm = 0777
			}
			return dir{
				permission:  perm,
				contentType: "commit",
				leaf:        d.leaf.(objects.HKID),
				parent:      &d,
				name:        name,
				openHandles: map[string]bool{},
				inode:       ino,
			}, nil
		*/
	}
	//get list hash
	l, listErr := services.GetList(c.ListHash) //l is the list object
	if listErr != nil {
		log.Printf("commit list retrieval error %s:", listErr)
		return nil, nil
	}

	listEntry, present := l[name] //go through list entries and is it maps to the string you passed in present == 1
	if !present {
		return nil, fuse.ENOENT
	}
	//getKey to figure out permissions of the child
	_, keyErr := services.GetKey(c.Hkid)
	//perm := fuse.Attr{Mode: 0555}//default read permissions
	perm := os.FileMode(0777)

	if keyErr != nil {
		log.Printf("error not nil; change file Mode %s:", keyErr)
		//perm =  fuse.Attr{Mode: 0755}
		perm = os.FileMode(0555)
	}

	if listEntry.TypeString == "blob" {
		b, blobErr := services.GetBlob(listEntry.Hash.(objects.HCID))
		sizeBlob := 0
		if blobErr == nil {
			sizeBlob = len(b)
		}
		return file{
			contentHash: listEntry.Hash.(objects.HCID),
			permission:  perm,
			name:        name,
			parent:      &d,
			inode:       nodeID,
			size:        uint64(sizeBlob),
		}, nil
	}

	ino = fuse.NodeID(1)
	if d.parent != nil {
		ino = generateInode(d.parent.inode, name)
	}

	return dir{
		leaf:        listEntry.Hash,
		permission:  perm,
		contentType: listEntry.TypeString,
		parent:      &d,
		name:        name,
		openHandles: map[string]*openFileHandle{},
		inode:       ino,
	}, nil

}