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tree.go
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tree.go
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package RiverFS
import (
"bazil.org/fuse"
"bazil.org/fuse/fs"
//"github.com/goraft/raft"
"os"
"sync"
)
type RootDir struct {
Dir *Dir
}
func NewRootDir() (r *RootDir) {
r = &RootDir{Dir: NewDir()}
return
}
func (nf *RootDir) Root() (fs.Node, fuse.Error) {
return nf.Dir, nil
}
type Node struct {
Name string
Mode os.FileMode
}
func (n *Node) Attr() fuse.Attr {
return fuse.Attr{Mode: n.Mode}
}
func (n *Node) Setattr(req *fuse.SetattrRequest, resp *fuse.SetattrResponse, intr fs.Intr) fuse.Error {
n.Mode = req.Mode
return nil
}
type Dir struct {
Node
rwmut sync.RWMutex
Children map[string]fs.Node
}
func NewDir() (d *Dir) {
d = &Dir{}
d.Node = Node{}
d.Mode = os.ModeDir
d.Children = make(map[string]fs.Node)
return
}
func (d *Dir) Add(name string, n fs.Node) {
//TODO: consensous
//TODO: Check if exists and error
d.rwmut.Lock()
d.Children[name] = n
d.rwmut.Unlock()
}
func (d *Dir) Rm(name string) {
//TODO: consensous
//TODO: Check if exists and error
//TODO: clean up disk space
d.rwmut.Lock()
delete(d.Children, name)
d.rwmut.Unlock()
}
func (d *Dir) Mkdir(req *fuse.MkdirRequest, intr fs.Intr) (n fs.Node, ferr fuse.Error) {
ndir := NewDir()
ndir.Name = req.Name
ndir.Mode = req.Mode
d.Add(req.Name, ndir)
return ndir, nil
}
func (d *Dir) Remove(req *fuse.RemoveRequest, intr fs.Intr) fuse.Error {
d.Rm(req.Name)
return nil
}
func (d *Dir) Rename(req *fuse.RenameRequest, newDir fs.Node, intr fs.Intr) fuse.Error {
d.rwmut.RLock()
node, ok := d.Children[req.OldName]
d.rwmut.RUnlock()
if !ok {
return fuse.ENOENT
}
d.Rm(req.OldName)
switch node.(type) {
case *Dir:
node.(*Dir).Name = req.NewName
case *File:
node.(*File).Name = req.NewName
}
newDir.(*Dir).Add(req.NewName, node)
return nil
}
func (d *Dir) Create(req *fuse.CreateRequest, resp *fuse.CreateResponse, intr fs.Intr) (fs.Node, fs.Handle, fuse.Error) {
n := &File{}
n.Mode = req.Mode
n.Name = req.Name
d.Add(req.Name, n)
return n, n, nil
}
func (d *Dir) Lookup(name string, intr fs.Intr) (fs fs.Node, err fuse.Error) {
d.rwmut.RLock()
fs, ok := d.Children[name]
d.rwmut.RUnlock()
if !ok {
return nil, fuse.ENOENT
}
return
}
func (d *Dir) ReadDir(intr fs.Intr) ([]fuse.Dirent, fuse.Error) {
var out []fuse.Dirent
d.rwmut.RLock()
for name, node := range d.Children {
de := fuse.Dirent{Name: name}
switch node.(type) {
case *Dir:
de.Type = fuse.DT_Dir
case *File:
de.Type = fuse.DT_Dir
}
out = append(out, de)
}
d.rwmut.RUnlock()
return out, nil
}
type File struct {
Node
}
func (f *File) ReadAll(intr fs.Intr) (out []byte, ferr fuse.Error) {
//Place holder code
return []byte("I AM A FILE!!!!11!!!\n"), ferr
}
func (f *File) WriteAll(in []byte, intr fs.Intr) fuse.Error {
return nil
}