func chkdirs(t Fataler, fs zx.Tree, d zx.Dir, recur bool) {
if d["path"] == "" {
t.Fatalf("no path in <%s>", d)
}
if d["type"] != "d" {
return
}
dents, err := zx.GetDir(fs, d["path"])
if err != nil {
t.Fatalf("getdir: %s: %s", d["path"], err)
}
if d["size"] != fmt.Sprintf("%d", len(dents)) {
t.Logf("%s: size %s len(dents) %d", d["path"], d["size"], len(dents))
t.Logf("d: %s\n", d.Long())
for _, cd := range dents {
t.Logf("\t%s\n", cd.Long())
}
t.Fatalf("bad dir size")
}
if recur {
for _, cd := range dents {
chkdirs(t, fs, cd, true)
}
}
}
// Dial the server for this dir (if not already dialed) and return it,
// the dir addr is updated.
func DirFs(d zx.Dir) (zx.Fs, error) {
switch p := d.Proto(); p {
case "lfs":
addr := d["addr"]
toks := strings.Split(d["addr"], "!") // lfs!root!/path
if len(toks) != 3 {
return nil, fmt.Errorf("ns: no zux tree for addr %q", addr)
}
fullpath := fpath.Join(toks[1], toks[2])
fs, root, rel := Lfs(fullpath)
if fs == nil {
return nil, fmt.Errorf("ns: no zux tree for addr %q", addr)
}
d["addr"] = "lfs!" + root + "!" + rel
return fs, nil
case "zx":
addr := d.SAddr()
if len(addr) < 3 {
panic("DirFs bug")
}
addr = addr[3:] // remove zx!
// rzx does cache dials, no need to do it again here.
return rzx.Dial(addr, auth.TLSclient)
default:
return nil, fmt.Errorf("ns: no tree for addr %q", d["addr"])
}
}
func (t *Fs) wstat(rid string, d zx.Dir) error {
f, err := t.walk(rid)
if err != nil {
return err
}
ud := d.UsrAttrs()
d, err = f.Stat()
if err != nil {
return err
}
ai := t.ai
if t.NoPermCheck {
ai = nil
}
if !t.WstatAll || t.ai != nil {
if err := d.CanWstat(ai, ud); err != nil {
return err
}
}
if wsf, ok := f.(Wstater); !ok {
if _, ok := f.(Putter); !ok {
return fmt.Errorf("%s: %s", rid, dbg.ErrPerm)
}
// ignore wstats if there's Put so that echo > file works.
return nil
} else {
return wsf.Wstat(ud)
}
}
func ch(d, nd zx.Dir) error {
if nd["mode"] != "" {
nd = nd.Dup()
chmod(d, nd["mode"])
}
_, err := cmd.Wstat(d["path"], nd)
return err
}
func mv1(src, dst zx.Dir) error {
cmd.VWarn("%s %s", src["Upath"], dst["Upath"])
cmd.Dprintf("mv1: %s %s %s %s\n", src.SAddr(), src["Rpath"], dst.SAddr(), dst["Rpath"])
if dry {
return nil
}
return cmd.Move(src["path"], dst["path"])
}
/*
Execute the part of the ns.Find operation that evaluates p
at the tree rooted at d (considering that its level is the one
indicated). Found entries are sent through the given channel,
which is closed only upon errors.
This is useful to implement ns.Find when writting services.
*/
func (p *Pred) FindAt(fs zx.Sender, d zx.Dir, c chan<- zx.Dir, lvl int) {
match, pruned, err := p.EvalAt(d, lvl)
if err != nil {
close(c, err)
return
}
if pruned {
nd := d.Dup()
nd["err"] = "pruned"
c <- nd
return
}
if d["rm"] != "" {
return
}
var ds []zx.Dir
if d["type"] == "d" {
ds, err = zx.GetDir(fs, d["path"])
}
if err != nil {
nd := d.Dup()
nd["err"] = err.Error()
c <- nd
return
}
if match {
if ok := c <- d; !ok {
return
}
}
for i := 0; i < len(ds); i++ {
cd := ds[i]
if cd["rm"] != "" {
continue
}
p.FindAt(fs, cd, c, lvl+1)
}
}
func Find(fs zx.Tree, path, pred string) <-chan zx.Dir {
c := make(chan zx.Dir)
go func() {
d, err := zx.Stat(fs, path)
if d == nil {
close(c, err)
return
}
x, err := New(pred)
if err != nil {
close(c, err)
return
}
x.FindAt(fs, d, c, 0)
close(c)
}()
return c
}
// does not check attributes that indicate that data changed.
func metaChanged(d0, d1 zx.Dir) bool {
ud0 := d0.UsrAttrs()
ud1 := d1.UsrAttrs()
for _, k := range ignoredAttrs {
delete(ud0, k)
delete(ud1, k)
}
return !zx.EqDir(ud0, ud1)
}
// Make a new Dir form a zd.Dir
func (z *Cfs) newDir(d zx.Dir) *Dir {
zd := &Dir{
z: z,
d: d,
path: d["path"],
mode: uint(d.Uint64("mode")&0777),
epoch: *z.epoch,
}
if zd.mode == 0 {
zd.mode = 0777
}
return zd
}
func Gets(t Fataler, fss ...zx.Tree) {
for i := 0; i < Repeats; i++ {
for _, fs := range fss {
for _, p := range GetFPaths {
printf("getall %s\n", p)
dat, err := zx.GetAll(fs, p)
if err != nil {
t.Fatalf("get %s: %s", p, err)
}
printf("got %d bytes \n\n", len(dat))
if string(dat) != string(FileData[p]) {
printf("got <%s>\nexpected<%s>\n",
string(dat), string(FileData[p]))
t.Fatalf("%s: bad data", p)
}
}
for _, p := range GetDPaths {
printf("getall %s\n", p)
dat, err := zx.GetAll(fs, p)
if err != nil {
t.Fatalf("get %s: %s", p, err)
}
var d zx.Dir
ents := []string{}
for len(dat) > 0 {
d, dat, err = zx.UnpackDir(dat)
if err != nil {
t.Fatalf("dir: %s", err)
}
if d["path"] == "/Ctl" || d["path"] == "/Chg" {
continue
}
ents = append(ents, d.TestFmt())
}
if strings.Join(GetDOuts[p], "\n") != strings.Join(ents, "\n") {
t.Fatalf("bad dir data for %s", p)
}
printf("got %d ents (ctl, chg excluded)\n", len(ents))
}
for _, p := range BadPaths {
dat, err := zx.GetAll(fs, p)
if err==nil || len(dat)>0 {
t.Fatalf("get %s didn't fail", p)
}
}
printf("\n")
}
}
}
func (t *Fs) put(rid string, d zx.Dir, off int64, dc <-chan []byte, pred string) error {
pf, err := t.walk(path.Dir(rid))
if err != nil {
return err
}
pd, err := pf.Stat()
if pd["type"] != "d" {
return fmt.Errorf("%s: %s", pd["path"], dbg.ErrNotDir)
}
wpf, ok := pf.(Walker)
if !ok {
return fmt.Errorf("%s: %s", pd["path"], dbg.ErrPerm)
}
f, err := wpf.Walk(path.Base(rid))
if err != nil && !dbg.IsNotExist(err) {
return err
}
if err != nil {
if err := t.matchDir(rid, nil, pred); err != nil {
return err
}
if !t.NoPermCheck && !pd.CanWrite(t.ai) {
return fmt.Errorf("%s: %s", rid, dbg.ErrPerm)
}
if putf, ok := pf.(Putter); ok {
return putf.Put(path.Base(rid), d, off, dc)
}
return fmt.Errorf("%s: %s", pd["path"], dbg.ErrPerm)
} else {
d, err := f.Stat()
if err != nil {
return err
}
if d["type"] == "d" {
return fmt.Errorf("%s: %s", rid, dbg.ErrIsDir)
}
if err := t.matchDir(rid, d, pred); err != nil {
return err
}
if !t.NoPermCheck && !d.CanWrite(t.ai) {
return fmt.Errorf("%s: %s", rid, dbg.ErrPerm)
}
if putf, ok := f.(Putter); ok {
return putf.Put("", d, off, dc)
}
return fmt.Errorf("%s: %s", d["path"], dbg.ErrPerm)
}
}
func (t *Fs) walk(rid string) (File, error) {
rid, err := zx.AbsPath(rid)
if err != nil {
return nil, err
}
if rid == "/" {
return t.root, nil
}
if rid == "/Ctl" {
return nil, nil
}
els := zx.Elems(rid)
f := t.root
p := "/"
var d zx.Dir
for _, e := range els {
t.Dprintf("walk %s %s...\n", f, e)
d, err = f.Stat()
if err != nil {
t.Dprintf("\tstat: %s\n", f, err)
return nil, err
}
if d["type"] != "d" {
t.Dprintf("\tnot dir\n")
return nil, fmt.Errorf("%s: %s", p, dbg.ErrNotDir)
}
if !t.NoPermCheck && !d.CanWalk(t.ai) {
t.Dprintf("\tno perm\n")
return nil, fmt.Errorf("%s: %s", p, dbg.ErrPerm)
}
wf, ok := f.(Walker)
if !ok {
t.Dprintf("\tnot walker\n")
return nil, fmt.Errorf("%s: %s: %s", p, e, dbg.ErrNotExist)
}
f, err = wf.Walk(e)
if err != nil {
t.Dprintf("\twalk: %s\n", err)
return nil, err
}
p = zx.Path(p, e)
t.Dprintf("walked %s\n", f)
}
return f, nil
}
func rmf(d zx.Dir) error {
p := d.SPath()
up := d["Upath"]
if up == "" {
up = d["path"]
}
if p == "" || p == "/" {
cmd.Fatal("won't remove / in server for '%s'", up)
}
cmd.VWarn("rmf%s %s", astr[aflag], up)
if dry {
return nil
}
if aflag {
return cmd.RemoveAll(d["path"])
}
return cmd.Remove(d["path"])
}
func (t *Fs) Put(rid string, d zx.Dir, off int64, dc <-chan []byte, pred string) chan zx.Dir {
d = d.Dup()
t.dprintf("put %s %v %d '%s'\n", rid, d, off, pred)
cs := t.IOstats.NewCall(zx.Sput)
c := make(chan zx.Dir, 1)
go func() {
cs.Sending()
rid, err := zx.AbsPath(rid)
var nm, n int64
var nd zx.Dir
if err == nil && rid == "/Ctl" {
nc, xerr := t.putCtl(dc)
if xerr == nil {
nd = zx.Dir{"size": "0"}
if DoSum {
nd["Sum"] = zx.Zsum()
}
nd.SetTime("mtime", time.Now())
nm = 1
n = int64(nc)
}
err = xerr
} else if err == nil {
nd, nm, n, err = t.put(rid, d, off, dc, pred)
cs.Sends(nm, n)
}
if err == nil {
rd := zx.Dir{"size": nd["size"], "mtime": nd["mtime"]}
if nd["Sum"] != "" {
rd["Sum"] = nd["Sum"]
}
t.dprintf("put %s: %s (wrote %d)\n", rid, rd, n)
c <- rd
} else {
t.dprintf("put %s: %s\n", rid, err)
close(dc, err)
}
close(c, err)
cs.End(err != nil)
}()
return c
}
func (t *Fs) Get(rid string, off, count int64, pred string) <-chan []byte {
t.dprintf("get %s %d %d %q\n", rid, off, count, pred)
cs := t.IOstats.NewCall(zx.Sget)
c := make(chan []byte)
go func() {
var d zx.Dir
f, err := t.walk(rid)
if f == nil && err == nil { // Ctl
d = ctldir.Dup()
} else if err == nil {
d, err = t.statf(f, rid)
}
if err == nil && !t.NoPermCheck {
if !d.CanRead(t.ai) {
err = fmt.Errorf("%s: %s", rid, dbg.ErrPerm)
}
}
if err == nil && pred != "" {
err = t.match(d, err, rid, pred)
}
if err == nil {
if d["path"] == "/Ctl" {
err = t.getCtl(off, count, c)
} else if d["type"] != "d" {
if gf, ok := f.(Getter); ok {
err = gf.Get(off, count, c)
}
} else {
err = t.getdir(f, d, off, count, c)
}
}
cs.End(err != nil)
if err != nil {
t.dprintf("get %s: %s\n", rid, err)
} else {
t.dprintf("get %s: ok\n", rid)
}
close(c, err)
}()
return c
}
// Print d in DB format
func DbFmt(d zx.Dir) string {
var b bytes.Buffer
fmt.Fprintf(&b, "%-14s", d["path"])
typ := d["type"]
if typ == "" {
fmt.Fprintf(&b, " -")
} else {
fmt.Fprintf(&b, " %s", typ)
}
if d["rm"] != "" {
fmt.Fprintf(&b, " GONE")
} else {
fmt.Fprintf(&b, " 0%o", d.Mode())
}
uid := nouid(d["Uid"])
gid := nouid(d["Gid"])
wuid := nouid(d["Wuid"])
fmt.Fprintf(&b, " %-8s %-8s %-8s", uid, gid, wuid)
fmt.Fprintf(&b, " %8d", d.Int64("size"))
if d["type"] != "d" {
fmt.Fprintf(&b, " %d", d.Uint64("mtime"))
}
if d["err"] != "" {
fmt.Fprintf(&b, " %s", d["err"])
}
return b.String()
}
// Walk to the given rid checking out perms when t.ai is not nil.
// Returns also the gid and mode even when no perms are checked.
func (t *Lfs) canWalkTo(rid string, forwhat int) (string, uint64, error) {
if !t.readattrs || rid == "/Ctl" {
return dbg.Usr, 0777, nil
}
noperm := t.NoPermCheck || t.ai == nil
elems := zx.Elems(rid)
fpath := t.path
pgid := ""
var pmode uint64
if len(elems) == 0 {
elems = append(elems, "/")
}
for len(elems) > 0 {
if noperm {
// skip to just the final step
if len(elems) > 1 {
fpath = zx.Path(t.path, path.Dir(rid))
elems = elems[len(elems)-1:]
}
}
pd := zx.Dir{
"name": elems[0],
}
fpath = zx.Path(fpath, elems[0])
elems = elems[1:]
st, err := os.Stat(fpath)
if err != nil {
return "", 0, err
}
mode := st.Mode()
m := int64(mode & 0777)
pd["mode"] = "0" + strconv.FormatInt(m, 8)
t.fileAttrs(fpath, pd)
if !noperm && len(elems) > 0 && !pd.CanWalk(t.ai) {
return "", 0, dbg.ErrPerm
}
if len(elems) == 0 {
pgid = pd["Gid"]
pmode = uint64(pd.Int("mode"))
}
if !noperm && len(elems) == 0 && forwhat != 0 {
if !pd.Can(t.ai, forwhat) {
return "", 0, dbg.ErrPerm
}
}
}
if pgid == "" {
pgid = dbg.Usr
}
if pmode == 0 {
pmode = 0775
}
return pgid, pmode, nil
}
func saveAttrs(dpath string, d zx.Dir) {
nd := zx.Dir{"name": d["name"]}
for k, v := range d {
if zx.IsUpper(k) {
nd[k] = v
}
}
if len(nd) == 1 {
return
}
dprintf("wrattr %s/%s %v\n", dpath, d["name"], nd)
fn := path.Join(dpath, afname)
fd, err := os.OpenFile(fn, os.O_WRONLY|os.O_APPEND, 0600)
if err != nil {
fd, err = os.OpenFile(fn, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0600)
}
if err != nil {
return
}
defer fd.Close()
fd.Write(nd.Pack())
}
func (t *Fs) Put(rid string, d zx.Dir, off int64, dc <-chan []byte, pred string) chan zx.Dir {
d = d.UsrAttrs()
t.dprintf("put %s %v %d '%s'\n", rid, d, off, pred)
cs := t.IOstats.NewCall(zx.Sput)
c := make(chan zx.Dir, 1)
go func() {
cs.Sending()
rid, err := zx.AbsPath(rid)
var nd zx.Dir
if err == nil && rid == "/" {
err = fmt.Errorf("/: %s", dbg.ErrPerm)
}
if err == nil && rid == "/Ctl" {
xerr := t.putCtl(dc)
if xerr == nil {
nd = zx.Dir{"size": "0", "Sum": zx.Zsum()}
nd.SetTime("mtime", time.Now())
}
err = xerr
} else if err == nil {
err = t.put(rid, d, off, dc, pred)
if err == nil {
nd, err = t.stat(rid)
}
}
if err == nil {
rd := zx.Dir{"size": nd["size"], "mtime": nd["mtime"], "Sum": nd["Sum"]}
t.dprintf("put %s: %s\n", rid, rd)
c <- rd
} else {
t.dprintf("put %s: %s\n", rid, err)
close(dc, err)
}
close(c, err)
cs.End(err != nil)
}()
return c
}
func (t *Fs) wstat(rid string, d zx.Dir) error {
f, _, err := t.walk(rid, nil)
if err != nil {
return err
}
f.mlk.Lock()
defer f.mlk.Unlock()
ai := t.ai
if t.NoPermCheck {
ai = nil
}
ud := d.UsrAttrs()
if !t.WstatAll || t.ai != nil {
if err := f.d.CanWstat(ai, d); err != nil {
return err
}
} else {
if d["Wuid"] != "" {
ud["Wuid"] = d["Wuid"]
}
}
return f.wstat(ud)
}
// See the Binder.Mount operation.
func (ns *Tree) Mount(fname string, d zx.Dir, flag Flag) <-chan error {
c := make(chan error, 1)
go func() {
name, err := zx.AbsPath(fname)
if err==nil && d==nil {
err = errors.New("no mounted dir")
}
if err != nil {
c <- err
close(c, err)
return
}
d = d.Dup()
delete(d, "mtime")
delete(d, "size")
d["path"] = name
d["name"] = path.Base(name)
ns.lk.Lock()
defer ns.lk.Unlock()
c <- ns.mount(d, flag)
close(c, err)
}()
return c
}
func (t *Fs) mkdir(rid string, d zx.Dir) error {
d = d.UsrAttrs()
pf, err := t.walk(path.Dir(rid))
if err != nil {
return err
}
pd, err := pf.Stat()
if pd["type"] != "d" {
return fmt.Errorf("%s: %s", pd["path"], dbg.ErrNotDir)
}
wpf, ok := pf.(Mkdirer)
if !ok {
return fmt.Errorf("%s: %s", pd["path"], dbg.ErrPerm)
}
_, err = wpf.Walk(path.Base(rid))
if err == nil {
return fmt.Errorf("%s: %s", pd["path"], dbg.ErrExists)
}
if !t.NoPermCheck && !pd.CanWrite(t.ai) {
return fmt.Errorf("%s: %s", rid, dbg.ErrPerm)
}
return wpf.Mkdir(path.Base(rid), d)
return fmt.Errorf("%s: %s", rid, dbg.ErrPerm)
}
// set a fake mtime that can be predicted.
func TouchZX(fs zx.RWTree, path string) error {
d := zx.Dir{}
d.SetTime("mtime", time.Unix(xt/1e9, xt%1e9))
xt += 1e9
return <-fs.Wstat(path, d)
}
func dataChanged(d0, d1 zx.Dir) bool {
return d0["type"] != d1["type"] ||
d0.Int64("size") != d1.Int64("size") ||
d0.Int64("mtime") != d1.Int64("mtime") ||
d0["Sum"] != "" && d1["Sum"] != "" && d0["Sum"] != d1["Sum"]
}
// d is a dup and can be changed.
func (t *Fs) find(f File, d zx.Dir, p *pred.Pred, spref, dpref string, lvl int,
c chan<- zx.Dir, ai *auth.Info) {
match, pruned, err := p.EvalAt(d, lvl)
t.dprintf("find at %v\n\t%v\n\t%v %v %v\n\n", d, p, match, pruned, err)
if pruned {
if !match {
d["err"] = "pruned"
}
c <- d
return
}
if d["type"] == "d" && err == nil {
if !t.NoPermCheck && !d.CanWalk(ai) {
err = dbg.ErrPerm
}
}
if err != nil {
d["err"] = err.Error()
c <-d
return
}
if d["rm"] != "" {
return
}
if match {
if ok := c <- d; !ok {
return
}
}
if d["type"] != "d" || f == nil {
return
}
wf, ok := f.(Walker)
if !ok {
return
}
ns, err := wf.Getdir()
if err != nil {
return
}
sort.Sort(sort.StringSlice(ns))
if d["name"] == "/" {
cd := ctldir.Dup()
if spref != dpref {
cpath := cd["path"]
suff := zx.Suffix(cpath, spref)
cd["path"] = zx.Path(dpref, suff)
}
t.find(nil, cd, p, spref, dpref, lvl+1, c, ai)
}
for _, cnm := range ns {
cf, err := wf.Walk(cnm)
if err != nil {
continue
}
cp := zx.Path(d["path"], cnm)
cd, err := t.statf(cf, cp)
if err != nil || cd["rm"] != "" {
continue
}
cd = cd.Dup()
if spref != dpref {
cpath := cd["path"]
suff := zx.Suffix(cpath, spref)
cd["path"] = zx.Path(dpref, suff)
}
t.find(cf, cd, p, spref, dpref, lvl+1, c, ai)
}
}
func (t *Fs) Find(rid, fpred, spref, dpref string, depth int) <-chan zx.Dir {
t.dprintf("find %s '%s' '%s' '%s' %d\n", rid, fpred, spref, dpref, depth)
cs := t.IOstats.NewCall(zx.Sfind)
dc := make(chan zx.Dir)
go func() {
rid, err := zx.AbsPath(rid)
if err != nil {
cs.End(err != nil)
t.dprintf("find %s: %s\n", rid, err)
close(dc, err)
return
}
f, err := t.walk(rid)
if err != nil {
cs.End(err != nil)
t.dprintf("find %s: %s\n", rid, err)
close(dc, err)
return
}
p, err := pred.New(fpred)
if err != nil {
cs.End(err != nil)
t.dprintf("find %s: %s\n", rid, err)
close(dc, err)
return
}
d, err := t.statf(f, rid)
if err != nil {
cs.End(err != nil)
t.dprintf("find %s: %s\n", rid, err)
close(dc, err)
return
}
d = d.Dup()
if spref != dpref {
suff := zx.Suffix(rid, spref)
d["path"] = zx.Path(dpref, suff)
}
t.find(f, d, p, spref, dpref, depth, dc, t.ai)
cs.End(err != nil)
t.dprintf("find %s: ok\n", rid)
close(dc)
}()
return dc
}
// used only by findget
func (t *Fs) get(rid string, datac chan<- []byte) error {
f, err := t.walk(rid)
if err != nil {
return err
}
gf, ok := f.(Getter)
if !ok {
return nil
}
return gf.Get(0, -1, datac)
}
func (t *Fs) FindGet(rid, fpred, spref, dpref string, depth int) <-chan zx.DirData {
t.dprintf("findget %s '%s' '%s' '%s' %d\n", rid, fpred, spref, dpref, depth)
gc := make(chan zx.DirData)
cs := t.IOstats.NewCall(zx.Sfindget)
go func() {
dc := t.Find(rid, fpred, spref, dpref, depth) // BUG: will stat a Sfind
for d := range dc {
g := zx.DirData{Dir: d}
var datac chan []byte
if d["err"] == "" && !t.NoPermCheck &&
d["type"] != "d" && !d.CanRead(t.ai) {
d["err"] = dbg.ErrPerm.Error()
}
if d["err"]=="" && d["type"]!="d" {
datac = make(chan []byte)
g.Datac = datac
}
if ok := gc <- g; !ok {
close(dc, cerror(gc))
break
}
if datac != nil {
err := t.get(d["spath"], datac)
close(datac, err)
}
}
err := cerror(dc)
cs.End(err != nil)
if err != nil {
t.dprintf("find %s: %s\n", rid, err)
} else {
t.dprintf("find %s: ok\n", rid)
}
close(gc, err)
}()
return gc
}
func (t *Fs) Mkdir(rid string, d zx.Dir) chan error {
t.dprintf("mkdir %s %v\n", rid, d)
cs := t.IOstats.NewCall(zx.Smkdir)
c := make(chan error, 1)
rid, err := zx.AbsPath(rid)
if rid == "/" || rid=="/Ctl" {
err = dbg.ErrExists
}
var f *mFile
var left []string
if err == nil {
f, left, err = t.walk(rid, nil)
}
if err == nil {
err = fmt.Errorf("'%s': %s", rid, dbg.ErrExists)
} else if len(left) == 1 {
err = nil
}
if err != nil {
cs.End(true)
t.dprintf("mkdir %s: %s\n", rid, err)
c <- err
close(c, err)
return c
}
ud := d.UsrAttrs()
delete(ud, "size")
noinherit := false
if m := ud["Mode"]; m != "" {
ud["mode"] = m
delete(ud, "Mode")
noinherit = true
}
if ud["mode"] == "" {
ud["mode"] = "0775"
}
if (!t.WstatAll || t.ai != nil) && !noinherit {
f.mlk.Lock()
ud["type"] = "d"
ud.Inherit(f.d.Mode())
delete(ud, "type")
f.mlk.Unlock()
}
u := dbg.Usr
if t.ai != nil {
u = t.ai.Uid
}
nf := &mFile {
name: left[0],
d: zx.Dir{
"mode": ud["mode"],
"name": left[0],
"path": rid,
"spath": rid,
"tpath": f.t.path,
"Uid": u,
"Gid": f.d["Gid"],
"Wuid": u,
"type": "d",
"size": "0",
"proto": "proc",
},
child: []*mFile{},
t: t,
}
if DoSum {
nf.d["Sum"] = zx.Zsum()
}
f.mlk.Lock()
if !t.noPerms() && !f.d.CanWrite(t.ai) {
err = fmt.Errorf("%s: %s", f, dbg.ErrPerm)
}
ai := t.ai
if t.NoPermCheck {
ai = nil
}
if err == nil && (!t.WstatAll || t.ai != nil) {
err = nf.d.CanWstat(ai, ud)
}
if err != nil {
f.mlk.Unlock()
cs.End(true)
t.dprintf("mkdir %s: %s\n", rid, err)
c <- err
close(c, err)
return c
}
f.mlk.Unlock()
f.mlk.Lock()
f.clk.Lock()
f.attach(nf)
f.clk.Unlock()
f.mlk.Unlock()
f = nf
f.mlk.Lock()
if t.WstatAll && t.ai == nil && d["Wuid"] != "" {
ud["Wuid"] = d["Wuid"]
}
err = f.wstat(ud)
f.mlk.Unlock()
cs.End(err != nil)
if err != nil {
t.dprintf("mkdir %s: %s\n", rid, err)
}
c <- err
close(c, err)
return c
}
// d is a dup and can be changed.
func (f *mFile) find(d zx.Dir, p *pred.Pred, spref, dpref string, lvl int, c chan<- zx.Dir, ai *auth.Info) {
match, pruned, err := p.EvalAt(d, lvl)
f.dprintf("find at %d %s\n\t%v\n\t%v %v %v\n\n",
lvl, d.Long(), p, match, pruned, err)
if pruned {
if !match {
d["err"] = "pruned"
}
c <- d
return
}
if d["type"] == "d" && err == nil {
f.mlk.Lock()
if !f.t.NoPermCheck && !f.d.CanWalk(ai) {
err = dbg.ErrPerm
}
f.mlk.Unlock()
}
if err != nil {
d["err"] = err.Error()
c <-d
return
}
if d["rm"] != "" {
return
}
if match {
if ok := c <- d; !ok {
return
}
}
if d["type"] != "d" {
return
}
f.clk.Lock()
child := make([]*mFile, len(f.child))
copy(child, f.child)
f.clk.Unlock()
if f.name == "/" {
nc := []*mFile{
&mFile{name: "Ctl", d: ctldir.Dup(), t: f.t},
}
nc[0].d["tpath"] = f.t.path
child = append(nc, child...)
}
for _, cf := range child {
cf.mlk.Lock()
cd := cf.d.Dup()
cf.mlk.Unlock()
// fmt.Printf("child %s\n", cd)
if cd["rm"] != "" {
continue
}
if spref != dpref {
cpath := cd["path"]
suff := zx.Suffix(cpath, spref)
cd["path"] = zx.Path(dpref, suff)
}
cf.find(cd, p, spref, dpref, lvl+1, c, ai)
}
}
func (t *Fs) Find(rid, fpred, spref, dpref string, depth int) <-chan zx.Dir {
t.dprintf("find %s '%s' '%s' '%s' %d\n", rid, fpred, spref, dpref, depth)
cs := t.IOstats.NewCall(zx.Sfind)
dc := make(chan zx.Dir)
go func() {
rid, err := zx.AbsPath(rid)
if err != nil {
cs.End(err != nil)
t.dprintf("find %s: %s\n", rid, err)
close(dc, err)
return
}
f, _, err := t.walk(rid, nil)
if err != nil {
cs.End(err != nil)
t.dprintf("find %s: %s\n", rid, err)
close(dc, err)
return
}
p, err := pred.New(fpred)
if err != nil {
cs.End(err != nil)
t.dprintf("find %s: %s\n", rid, err)
close(dc, err)
return
}
cs.Sending()
f.mlk.Lock()
d := f.d.Dup()
f.mlk.Unlock()
if spref != dpref {
suff := zx.Suffix(rid, spref)
d["path"] = zx.Path(dpref, suff)
}
f.find(d, p, spref, dpref, depth, dc, t.ai)
cs.End(err != nil)
t.dprintf("find %s: ok\n", rid)
close(dc)
}()
return dc
}
func (t *Fs) FindGet(rid, fpred, spref, dpref string, depth int) <-chan zx.DirData {
t.dprintf("findget %s '%s' '%s' '%s' %d\n", rid, fpred, spref, dpref, depth)
gc := make(chan zx.DirData)
cs := t.IOstats.NewCall(zx.Sfindget)
go func() {
dc := t.Find(rid, fpred, spref, dpref, depth) // BUG: will stat a Sfind
for d := range dc {
g := zx.DirData{Dir: d}
var datac chan []byte
if d["err"]=="" && d["type"]=="-" {
datac = make(chan []byte)
g.Datac = datac
}
if ok := gc <- g; !ok {
close(dc, cerror(gc))
break
}
if datac != nil {
err := t.get(d["spath"], 0, zx.All, datac, nil)
close(datac, err)
}
}
err := cerror(dc)
cs.End(err != nil)
if err != nil {
t.dprintf("find %s: %s\n", rid, err)
} else {
t.dprintf("find %s: ok\n", rid)
}
close(gc, err)
}()
return gc
}
func (t *Fs) Dump(w io.Writer) {
if t == nil {
fmt.Fprintf(w, "<nil tree>\n")
return
}
fmt.Fprintf(w, "tree [%s] path %s\n", t.name, t.path)
t.root.Dump(w, 0)
fmt.Fprintf(w, "\n")
}
func (f *mFile) Dump(w io.Writer, lvl int) {
tabs := strings.Repeat(" ", lvl)
if f == nil {
fmt.Fprintf(w, "%s<nil file>\n", tabs)
return
}
d := f.d.Dup()
if d["path"] == "/" {
d["size"] = "0"
}
fmt.Fprintf(w, "%s%s\n", tabs, d.TestFmt())
if d["type"] != "d" {
fmt.Fprintf(w, "%s %d bytes\n", tabs, f.data.Len())
return
}
for _, c := range f.child {
c.Dump(w, lvl+1)
}
}
func TestAttrCache(t *testing.T) {
os.Remove("/tmp/.zx")
d := zx.Dir{"foo": "bar"}
ac.set("/tmp/one", d)
d = zx.Dir{"foo1": "bar1"}
ac.set("/tmp/one", d)
d = zx.Dir{"foo2": "bar2"}
ac.set("/tmp/two", d)
d = zx.Dir{}
ac.get("/tmp/one", d)
t.Logf("did get %s\n", d.LongFmt())
if d.LongFmt() != `one foo:"bar" foo1:"bar1"` {
t.Fatalf("didn't get attrs")
}
d = zx.Dir{}
ac.get("/tmp/two", d)
t.Logf("did get %s\n", d.LongFmt())
if d.LongFmt() != `two foo2:"bar2"` {
t.Fatalf("didn't get attrs")
}
ac.sync()
d = zx.Dir{}
ac.get("/tmp/one", d)
t.Logf("did get %s\n", d.LongFmt())
if d.LongFmt() != `one foo:"bar" foo1:"bar1"` {
t.Fatalf("didn't get attrs after sync")
}
d = zx.Dir{"foo": "bar"}
ac.set("/tmp/two", d)
d = zx.Dir{}
ac.get("/tmp/two", d)
t.Logf("did get %s\n", d.LongFmt())
if d.LongFmt() != `two foo:"bar" foo2:"bar2"` {
t.Fatalf("didn't get attrs after sync")
}
}
func (t *Fs) put(rid string, d zx.Dir, off int64, dc <-chan []byte, pred string) (zx.Dir, int64, int64, error) {
noinherit := false
if m := d["Mode"]; m != "" {
d["mode"] = m
delete(d, "Mode")
noinherit = true
}
var pf *mFile
f, left, err := t.walk(rid, &pf)
if err != nil && !dbg.IsNotExist(err) || len(left) > 1|| d["mode"] == "" && err != nil {
return nil, 0, 0, err
}
pmode := uint64(0755)
if pf != nil {
pf.mlk.Lock()
pmode = pf.d.Mode()
pf.mlk.Unlock()
}
app := false
f.mlk.Lock()
if err == nil && f.d["type"] == "d" || d["type"] == "d" {
err = fmt.Errorf("%s: %s", f, dbg.ErrIsDir)
f.mlk.Unlock()
return nil, 0, 0, err
}
if !t.noPerms() && !f.d.CanWrite(t.ai) {
err = fmt.Errorf("%s: %s", f, dbg.ErrPerm)
f.mlk.Unlock()
return nil, 0, 0, err
}
u := dbg.Usr
if t.ai != nil {
u = t.ai.Uid
}
if d == nil {
d = zx.Dir{}
}
ai := t.ai
if t.NoPermCheck {
ai = nil
}
if d["mode"] == "" || err == nil { // truncate or rewrite
if err := t.matchDir(rid, f.d, pred); err != nil {
f.mlk.Unlock()
return nil, 0, 0, err
}
if !t.WstatAll || t.ai != nil {
if err := f.d.CanWstat(ai, d); err != nil {
f.mlk.Unlock()
return nil, 0, 0, err
}
}
} else {
if err := t.matchDir(rid, nil, pred); err != nil {
f.mlk.Unlock()
return nil, 0, 0, err
}
}
if d["mode"] == "" {
if off < 0 {
off = 0
app = true
}
if t.WstatAll && t.ai == nil && d["Wuid"] != "" {
f.d["Wuid"] = d["Wuid"]
} else {
f.d["Wuid"] = u
}
if d["size"] != "" {
f.data.Truncate(d.Int64("size"))
f.d["size"] = strconv.FormatInt(int64(f.data.Len()), 10)
}
} else if err == nil {
// truncate existing file
if !noinherit && (!t.WstatAll || t.ai != nil) {
d.Inherit(pmode)
}
f.data.Truncate(d.Int64("size"))
f.d["size"] = strconv.FormatInt(int64(f.data.Len()), 10)
if t.WstatAll && t.ai == nil && d["Wuid"] != "" {
f.d["Wuid"] = d["Wuid"]
} else {
f.d["Wuid"] = u
}
} else {
// create a new file
nf := &mFile {
name: left[0],
d: zx.Dir{
"mode": d["mode"],
"name": left[0],
"path": rid,
"spath": rid,
"tpath": f.d["tpath"],
"Uid": u,
"Gid": f.d["Gid"],
"Wuid": u,
"type": "-",
"size": "0",
"proto": "proc",
},
data: &bufs.Blocks{Mutex: &sync.Mutex{}},
t: t,
}
if !t.WstatAll || t.ai != nil {
if !noinherit {
nf.d.Inherit(pmode)
d["mode"] = nf.d["mode"]
}
if err := f.d.CanWstat(ai, d); err != nil {
f.mlk.Unlock()
return nil, 0, 0, err
}
} else if d["Wuid"] != "" {
f.d["Wuid"] = d["Wuid"]
}
nf.data.Truncate(d.Int64("size"))
nf.d["size"] = strconv.FormatInt(int64(nf.data.Len()), 10)
f.clk.Lock()
f.attach(nf)
f.clk.Unlock()
f.mlk.Unlock()
f = nf
f.mlk.Lock()
}
if app {
off = int64(f.data.Len())
}
delete(d, "size")
f.wstat(d.UsrAttrs())
f.mlk.Unlock()
n, err := f.data.RecvAtFrom(off, dc)
f.mlk.Lock()
defer f.mlk.Unlock()
if DoSum {
sum := f.data.Sum()
f.d["Sum"] = sum
}
size := f.data.Len()
f.d["size"] = strconv.Itoa(size)
if d["mtime"] == "" {
f.d.SetTime("mtime", time.Now())
}
return f.d.Dup(), 1, int64(n), err
}
// Compare d with the previous info in zd, and refresh its
// metadata, perhaps invalidating the data. Returns true
// if there is any change in data or metadata.
// this does not can changed(), the caller should do that.
func (zd *Dir) stated(from string, d zx.Dir, err error) (mchanged, dchanged bool, rerr error) {
pzd := zd.parent
if zd.path=="/Ctl" || zd.path=="/Chg" {
return false, false, nil
}
if d==nil || d["rm"]!="" {
if zd.ghost {
zd.d["rm"] = "y" // safety first, but it's ok
return false, false, dbg.ErrNotExist
}
zd.kill(from)
if pzd!=nil && zd.epoch==0 {
pzd.invalData() // cause a re-read.
}
return true, true, err
}
dchanged = zd.ghost
zd.ghost = false
mchanged = dchanged
if mchanged {
zd.cprintf(zd.path, "mchanged by data (%s)\n", from)
} else {
for k, v := range zd.d {
nv := d[k]
if nv != v {
nv := d[k]
if len(nv) > 6 {
nv = nv[:6] + "..."
}
zd.cprintf(zd.path, "mchanged %s = %s (%s)\n", k, nv, from)
mchanged = true
break
}
}
}
if !mchanged {
zd.cprintf("stated", "no changes (%s)\n", from)
return dchanged, dchanged, nil
}
ot, nt := zd.d["type"], d["type"]
overs, nvers := zd.d.Int("vers"), d.Int("vers")
if nt==ot && nt!="d" && nvers!=0 && nvers<overs {
zd.cprintf("stated", "old update ignored v %d (%s)\n", nvers, from)
return dchanged, dchanged, nil
}
switch {
case ot!=nt && (nt=="d" || ot=="d"):
// file became dir or dir became file
zd.child = nil
dchanged = true
zd.cprintf(zd.path, "dchanged type %s (%s)\n", nt, from)
case zd.d["mtime"] != d["mtime"]:
zd.cprintf(zd.path, "dchanged mtime %s (%s)\n", d["mtime"], from)
dchanged = true
case d["Sum"]!="" && zd.d["Sum"]!=d["Sum"]:
ns := d["Sum"]
if len(ns) > 6 {
ns = ns[:6] + "..."
}
zd.cprintf(zd.path, "dchanged Sum %s (%s)\n", ns, from)
dchanged = true
case nt!="d" && zd.d["size"]!=d["size"]:
zd.cprintf(zd.path, "dchanged size %s (%s)\n", d["size"], from)
dchanged = true
}
if d["Sum"] == "" {
d["Sum"] = zd.d["Sum"]
}
if d["vers"] == "" {
d["vers"] = zd.d["vers"]
}
zd.d = d
zd.mode = uint(zd.d.Uint64("mode")&0777)
zd.refreshMeta()
if dchanged {
zd.invalData()
}
return mchanged, dchanged, nil
}
// NB: Attributes that the user can't set are always ignored.
// If the user has no permissioin to set an attribute, that's an error.
// Setting an attribute to an empty string removes it.
// Uid, Gid, and Wuid can't be removed.
// Meta locking done by caller, might lock data on truncations
func (f *mFile) wstat(d zx.Dir) error {
if len(d) == 0 {
return nil
}
d = d.Dup()
sum := ""
if f.d["type"] != "d" {
if _, ok := d["size"]; ok {
sz := d.Int64("size")
if sz < 0 {
sz = 0
}
f.data.Truncate(sz)
d["size"] = strconv.FormatInt(sz, 10)
if DoSum {
sum = f.data.Sum()
}
}
} else {
delete(d, "size")
}
if _, ok := d["mode"]; ok {
mode := d.Int("mode")&0777
d["mode"] = "0" + strconv.FormatInt(int64(mode), 8)
}
if _, ok := d["mtime"]; ok {
d.SetTime("mtime", d.Time("mtime"))
}
if sum != "" {
f.d["Sum"] = sum
}
ud := d.UsrAttrs()
if d["Wuid"] != "" {
ud["Wuid"] = d["Wuid"]
}
for k, v := range ud {
if v == "" {
delete(f.d, k)
} else {
f.d[k] = v
}
}
return nil
}
