func New(t zx.Tree) *Fs {
fs := &Fs{
ufs: t,
fs: zx.RWTreeFor(t),
Flags: &Flags{},
}
return fs
}
// Resolve a name and return the prefix, the zx.RWTrees for it and the server paths
// for each one. If the trees are read-only, null write methods are supplied
// using a zx.Partial tree.
// If there are errors, the last one is reproted and any partial results are returned.
// The path must be absolute.
func (ns *Tree) ResolveTree(name string) (pref string, ts []zx.RWTree, spaths []string, err error) {
ppath, mnts, paths, err := ns.Resolve(name)
if err != nil {
return "", nil, nil, err
}
ts = make([]zx.RWTree, 0, len(mnts))
spaths = make([]string, 0, len(paths))
for i, d := range mnts {
t, terr := zx.RWDirTree(d)
if err != nil {
err = terr
} else {
ts = append(ts, zx.RWTreeFor(t))
spaths = append(spaths, paths[i])
}
}
if len(ts) == 0 && err == nil {
err = errors.New("no mounted tree")
}
return ppath, ts, spaths, err
}
func (t *Fs) Get(rid string, off, count int64, pred string) <-chan []byte {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->get[%d] %s %d %d '%s'", n, rid, off, count, pred)
dc := make(chan []byte)
go func(){
xc := t.fs.Get(rid, off, count, pred)
nb, nm := 0, 0
for d := range xc {
s := dbg.HexStr(d, 16)
t.vprintf("<-get[%d] %d bytes %s", n, len(d), s)
if ok := dc <- d; !ok {
close(xc, "client gone")
}
nb += len(d)
nm++
}
err := cerror(xc)
t.printf("<-get[%d] %d bytes %d msgs sts %v", n, nb, nm, err)
close(dc, err)
}()
return dc
}
func (t *Fs) Put(rid string, d zx.Dir, off int64, dc <-chan []byte, pred string) chan zx.Dir {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->put[%d] %s %s %d '%s'", n, rid, d, off, pred)
rc := make(chan zx.Dir, 1)
datc := make(chan []byte)
if dc == nil {
datc = nil
} else {
go func() {
for d := range dc {
s := dbg.HexStr(d, 16)
t.vprintf("->put[%d] %d bytes %s", n, len(d), s)
if ok := datc <- d; !ok {
close(dc, cerror(datc))
break
}
}
err := cerror(dc)
t.vprintf("->put[%d] sts %v", n, err)
close(datc, err)
}()
}
go func() {
xc := t.fs.Put(rid, d, off, datc, pred)
d := <-xc
err := cerror(xc)
if err != nil {
close(datc, err)
}
t.printf("<-put[%d] %s sts %v", n, d, err)
rc <-d
close(rc, err)
}()
return rc
}
func (t *Fs) Mkdir(rid string, d zx.Dir) chan error {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->mkdir[%d] %s %s", n, rid, d)
dc := make(chan error, 1)
go func() {
xc := t.fs.Mkdir(rid, d)
err := <- xc
t.printf("<-mkdir[%d] sts %v", n, err)
dc <- err
close(dc, cerror(xc))
}()
return dc
}
func (t *Fs) Wstat(rid string, d zx.Dir) chan error {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->wstat[%d] %s %s", n, rid, d)
dc := make(chan error, 1)
go func() {
xc := t.fs.Wstat(rid, d)
err := <- xc
t.printf("<-wstat[%d] sts %v", n, err)
dc <- err
close(dc, cerror(xc))
}()
return dc
}
func (t *Fs) Move(from, to string) chan error {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->move[%d] %s %s", n, from, to)
dc := make(chan error, 1)
go func() {
xc := t.fs.Move(from, to)
err := <- xc
t.printf("<-move[%d] sts %v", n, err)
dc <- err
close(dc, cerror(xc))
}()
return dc
}
func (t *Fs) Remove(rid string) chan error {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->remove[%d] %s", n, rid)
dc := make(chan error, 1)
go func() {
xc := t.fs.Remove(rid)
err := <- xc
t.printf("<-remove[%d] sts %v", n, err)
dc <- err
close(dc, cerror(xc))
}()
return dc
}
func (t *Fs) RemoveAll(rid string) chan error {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->removeall[%d] %s", n, rid)
dc := make(chan error, 1)
go func() {
xc := t.fs.RemoveAll(rid)
err := <- xc
t.printf("<-removeall[%d] sts %v", n, err)
dc <- err
close(dc, cerror(xc))
}()
return dc
}
func (t *Fs) Fsys(name string) <-chan error {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->fsys[%d] %s", n, name)
dc := make(chan error, 1)
go func() {
var xc <-chan error
if fnd, ok := t.fs.(zx.Finder); ok {
xc = fnd.Fsys(name)
} else {
xx := make(chan error, 1)
xx <- dbg.ErrBug
close(xx, dbg.ErrBug)
xc = xx
}
err := <- xc
t.printf("<-fsys[%d] sts %v", n, err)
dc <- err
close(dc, cerror(xc))
}()
return dc
}
func (t *Fs) Find(rid, fpred, spref, dpref string, depth int) <-chan zx.Dir {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->find[%d] %s '%s' '%s' '%s' %d", n, rid, fpred, spref, dpref, depth)
dc := make(chan zx.Dir, 1)
go func() {
xc := t.fs.Find(rid, fpred, spref, dpref, depth)
nm := 0
for d := range xc {
nm++
t.vprintf("<-find[%d] %s", n, d)
dc <- d
}
err := cerror(xc)
t.printf("<-find[%d] %d msgs sts %v", n, nm, err)
close(dc, err)
}()
return dc
}
func (t *Fs) FindGet(rid, fpred, spref, dpref string, depth int) <-chan zx.DirData {
n := atomic.AddInt32(&t.nb, 1)
t.printf("->findget[%d] %s '%s' '%s' '%s' %d", n, rid, fpred, spref, dpref, depth)
dc := make(chan zx.DirData)
go func() {
xc := t.fs.FindGet(rid, fpred, spref, dpref, depth)
nm := 0
for d := range xc {
nm++
t.vprintf("<-findget[%d] %s", n, d)
if ok := dc <- d; !ok {
close(xc, "client gone")
}
}
err := cerror(xc)
t.printf("<-findget[%d] %d msgs sts %v", n, nm, err)
close(dc, err)
}()
return dc
}
// Ask the tree to perform auth checks on behalf of ai.
func (t *Fs) AuthFor(ai *auth.Info) (zx.Tree, error) {
nfs := &Fs{}
*nfs = *t
if afs, ok := t.ufs.(zx.AuthTree); ok {
x, err := afs.AuthFor(ai)
if err == nil {
nfs.ufs = x
nfs.fs = zx.RWTreeFor(nfs.ufs)
return nfs, nil
}
return nil, err
}
return nil, errors.New("no auth")
}
func (t *Fs) Dump(w io.Writer) {
if dfs, ok := t.fs.(zx.Dumper); ok {
dfs.Dump(w)
} else {
fmt.Fprintf(w, "no dumps for %s\n", t)
}
}
func (t *Fs) Stats() *zx.IOstats {
if dfs, ok := t.fs.(zx.StatTree); ok {
return dfs.Stats()
}
return nil
}
