// Lookup implements the fs.NodeRequestLookuper interface for Root.
func (r *Root) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (node fs.Node, err error) {
r.private.fs.log.CDebugf(ctx, "FS Lookup %s", req.Name)
defer func() { r.private.fs.reportErr(ctx, libkbfs.ReadMode, err) }()
specialNode := handleSpecialFile(req.Name, r.private.fs, resp)
if specialNode != nil {
return specialNode, nil
}
switch req.Name {
case libfs.StatusFileName:
return NewStatusFile(r.private.fs, nil, resp), nil
case PrivateName:
return r.private, nil
case PublicName:
return r.public, nil
case libfs.HumanErrorFileName, libfs.HumanNoLoginFileName:
resp.EntryValid = 0
return &SpecialReadFile{r.private.fs.remoteStatus.NewSpecialReadFunc}, nil
}
// Don't want to pop up errors on special OS files.
if strings.HasPrefix(req.Name, ".") {
return nil, fuse.ENOENT
}
return nil, libkbfs.NoSuchFolderListError{
Name: req.Name,
PrivName: PrivateName,
PubName: PublicName,
}
}
// NewMetricsFile returns a special read file that contains a text
// representation of all metrics.
func NewMetricsFile(fs *FS, resp *fuse.LookupResponse) *SpecialReadFile {
resp.EntryValid = 0
return &SpecialReadFile{
read: func(_ context.Context) ([]byte, time.Time, error) {
return getEncodedMetrics(fs)
},
}
}
// NewStatusFile returns a special read file that contains a text
// representation of the status of the current TLF.
func NewStatusFile(folder *Folder, resp *fuse.LookupResponse) *SpecialReadFile {
resp.EntryValid = 0
return &SpecialReadFile{
read: func(ctx context.Context) ([]byte, time.Time, error) {
return getEncodedStatus(ctx, folder)
},
}
}
// Lookup implements the fs.NodeRequestLookuper interface.
func (pl ProfileList) Lookup(_ context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (node fs.Node, err error) {
f := libfs.ProfileGet(req.Name)
if f == nil {
return nil, fuse.ENOENT
}
resp.EntryValid = 0
return &SpecialReadFile{read: f}, nil
}
func (c *serveConn) saveLookup(s *fuse.LookupResponse, snode *serveNode, elem string, n2 Node) {
name := path.Join(snode.name, elem)
var sn *serveNode
s.Node, s.Generation, sn = c.saveNode(name, n2)
if s.EntryValid == 0 {
s.EntryValid = 1 * time.Minute
}
if s.AttrValid == 0 {
s.AttrValid = 1 * time.Minute
}
s.Attr = sn.attr()
}
func (c *serveConn) saveLookup(s *fuse.LookupResponse, snode *serveNode, elem string, n2 Node) {
s.Attr = nodeAttr(n2)
if s.Attr.Inode == 0 {
s.Attr.Inode = c.dynamicInode(snode.inode, elem)
}
s.Node, s.Generation = c.saveNode(s.Attr.Inode, n2)
if s.EntryValid == 0 {
s.EntryValid = entryValidTime
}
if s.AttrValid == 0 {
s.AttrValid = attrValidTime
}
}
func initLookupResponse(s *fuse.LookupResponse) {
s.EntryValid = entryValidTime
}
// Lookup implements the fs.NodeRequestLookuper interface for Dir.
func (d *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (node fs.Node, err error) {
ctx = NewContextWithOpID(ctx, d.folder.fs.log)
d.folder.fs.log.CDebugf(ctx, "Dir Lookup %s", req.Name)
defer func() { d.folder.fs.reportErr(ctx, err) }()
switch req.Name {
case libkbfs.ErrorFile:
return NewErrorFile(d.folder.fs, resp), nil
case MetricsFileName:
return NewMetricsFile(d.folder.fs, resp), nil
case StatusFileName:
return NewStatusFile(d.folder, resp), nil
case UpdateHistoryFileName:
return NewUpdateHistoryFile(d.folder, resp), nil
case UnstageFileName:
resp.EntryValid = 0
child := &UnstageFile{
folder: d.folder,
}
return child, nil
case DisableUpdatesFileName:
resp.EntryValid = 0
child := &UpdatesFile{
folder: d.folder,
}
return child, nil
case EnableUpdatesFileName:
resp.EntryValid = 0
child := &UpdatesFile{
folder: d.folder,
enable: true,
}
return child, nil
case RekeyFileName:
resp.EntryValid = 0
child := &RekeyFile{
folder: d.folder,
}
return child, nil
}
newNode, de, err := d.folder.fs.config.KBFSOps().Lookup(ctx, d.node, req.Name)
if err != nil {
if _, ok := err.(libkbfs.NoSuchNameError); ok {
return nil, fuse.ENOENT
}
return nil, err
}
// No libkbfs calls after this point!
d.folder.mu.Lock()
defer d.folder.mu.Unlock()
// newNode can be nil even without errors when the KBFS direntry
// is of a type that doesn't get its own node (is fully contained
// in the directory); Symlink does this.
if newNode != nil {
if n, ok := d.folder.nodes[newNode.GetID()]; ok {
return n, nil
}
}
switch de.Type {
default:
return nil, fmt.Errorf("unhandled entry type: %v", de.Type)
case libkbfs.File, libkbfs.Exec:
child := &File{
folder: d.folder,
node: newNode,
}
d.folder.nodes[newNode.GetID()] = child
return child, nil
case libkbfs.Dir:
child := newDir(d.folder, newNode)
d.folder.nodes[newNode.GetID()] = child
return child, nil
case libkbfs.Sym:
child := &Symlink{
parent: d,
name: req.Name,
}
// a Symlink is never included in Folder.nodes, as it doesn't
// have a libkbfs.Node to keep track of renames.
return child, nil
}
}
// Lookup implements the fs.NodeRequestLookuper interface.
func (fl *FolderList) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (node fs.Node, err error) {
ctx = NewContextWithOpID(ctx, fl.fs.log)
fl.fs.log.CDebugf(ctx, "FL Lookup %s", req.Name)
defer func() { fl.fs.reportErr(ctx, err) }()
fl.mu.Lock()
defer fl.mu.Unlock()
if req.Name == libkbfs.ErrorFile {
return NewErrorFile(fl.fs, resp), nil
}
if req.Name == MetricsFileName {
return NewMetricsFile(fl.fs, resp), nil
}
if child, ok := fl.folders[req.Name]; ok {
return child, nil
}
// Shortcut for dreaded extraneous OSX finder lookups
if strings.HasPrefix(req.Name, "._") {
return nil, fuse.ENOENT
}
rootNode, _, err :=
fl.fs.config.KBFSOps().GetOrCreateRootNode(
ctx, req.Name, fl.public, libkbfs.MasterBranch)
switch err := err.(type) {
case nil:
// No error.
break
case libkbfs.TlfNameNotCanonical:
// Non-canonical name.
n := &Alias{
canon: err.NameToTry,
}
return n, nil
case libkbfs.NoSuchNameError:
// Invalid public TLF.
return nil, fuse.ENOENT
case libkbfs.WriteAccessError:
// No permissions to create TLF.
fl.fs.log.CDebugf(ctx, "Local user doesn't have permission to create "+
" %s and it doesn't exist yet, so making an empty folder", req.Name)
// Only cache this empty folder for a minute, in case a valid
// writer comes along and creates it.
resp.EntryValid = 60 * time.Second
return &EmptyFolder{fl.fs}, nil
default:
// Some other error.
return nil, err
}
folderBranch := rootNode.GetFolderBranch()
folder := &Folder{
fs: fl.fs,
list: fl,
name: req.Name,
folderBranch: folderBranch,
nodes: map[libkbfs.NodeID]fs.Node{},
}
// TODO unregister all at unmount
if err := fl.fs.config.Notifier().RegisterForChanges([]libkbfs.FolderBranch{folderBranch}, folder); err != nil {
return nil, err
}
child := newDir(folder, rootNode)
folder.nodes[rootNode.GetID()] = child
fl.folders[req.Name] = child
return child, nil
}
// NewErrorFile returns a special read file that contains a text
// representation of the last few KBFS errors.
func NewErrorFile(fs *FS, resp *fuse.LookupResponse) *SpecialReadFile {
resp.EntryValid = 0
return &SpecialReadFile{read: libfs.GetEncodedErrors(fs.config)}
}