delete 9P2000.u

thanks to Erik Quanstrom

R=rsc
http://codereview.appspot.com/3469042

13 files changed, 64 insertions, 327 deletions

diff --git a/src/cmd/9pserve.c b/src/cmd/9pserve.c
index 32b984be..077715d6 100644
--- a/src/cmd/9pserve.c
+++ b/src/cmd/9pserve.c
@@ -75,7 +75,6 @@ struct Conn
 	Queue *outq;
 	Queue *inq;
 	Channel *outqdead;
-	int dotu;
 };
 
 char *xaname;
@@ -91,13 +90,12 @@ int msize = 8192;
 u32int xafid = NOFID;
 int attached;
 int versioned;
-int dotu;
 int noauth;
 
 void *gethash(Hash**, uint);
 int puthash(Hash**, uint, void*);
 int delhash(Hash**, uint, void*);
-Msg *mread9p(Ioproc*, int, int);
+Msg *mread9p(Ioproc*, int);
 int mwrite9p(Ioproc*, int, uchar*);
 uchar *read9ppkt(Ioproc*, int);
 int write9ppkt(int, uchar*);
@@ -119,7 +117,7 @@ void listenthread(void*);
 void outputthread(void*);
 void inputthread(void*);
 void rewritehdr(Fcall*, uchar*);
-void repack(Fcall*, uchar**, int);
+void repack(Fcall*, uchar**);
 int tlisten(char*, char*);
 int taccept(int, char*);
 int iolisten(Ioproc*, char*, char*);
@@ -130,8 +128,6 @@ void mainproc(void*);
 int ignorepipe(void*, char*);
 int timefmt(Fmt*);
 void dorootstat(void);
-int stripudirread(Msg*);
-int cvtustat(Fcall*, uchar**, int);
 
 void
 usage(void)
@@ -237,7 +233,7 @@ mainproc(void *v)
 
 	if(!versioned){
 		f.type = Tversion;
-		f.version = "9P2000.u";
+		f.version = "9P2000";
 		f.msize = msize;
 		f.tag = NOTAG;
 		n = convS2M(&f, vbuf, sizeof vbuf);
@@ -255,7 +251,6 @@ mainproc(void *v)
 		if(f.msize < msize)
 			msize = f.msize;
 		if(verbose > 1) fprint(2, "%T * -> %F\n", &f);
-		dotu = strncmp(f.version, "9P2000.u", 8) == 0;
 	}
 
 	threadcreate(inputthread, nil, STACK);
@@ -315,13 +310,13 @@ send9pmsg(Msg *m)
 {
 	int n, nn;
 
-	n = sizeS2Mu(&m->rx, m->c->dotu);
+	n = sizeS2M(&m->rx);
 	m->rpkt = emalloc(n);
-	nn = convS2Mu(&m->rx, m->rpkt, n, m->c->dotu);
+	nn = convS2M(&m->rx, m->rpkt, n);
 	if(nn <= BIT16SZ)
-		sysfatal("convS2Mu conversion error");
+		sysfatal("convS2M conversion error");
 	if(nn != n)
-		sysfatal("sizeS2Mu and convS2Mu disagree");
+		sysfatal("sizeS2M and convS2M disagree");
 	sendq(m->c->outq, m);
 }
 
@@ -330,13 +325,13 @@ sendomsg(Msg *m)
 {
 	int n, nn;
 
-	n = sizeS2Mu(&m->tx, m->c->dotu);
+	n = sizeS2M(&m->tx);
 	m->tpkt = emalloc(n);
-	nn = convS2Mu(&m->tx, m->tpkt, n, m->c->dotu);
+	nn = convS2M(&m->tx, m->tpkt, n);
 	if(nn <= BIT16SZ)
-		sysfatal("convS2Mu conversion error");
+		sysfatal("convS2M conversion error");
 	if(nn != n)
-		sysfatal("sizeS2Mu and convS2Mu disagree");
+		sysfatal("sizeS2M and convS2M disagree");
 	sendq(outq, m);
 }
 
@@ -380,7 +375,7 @@ connthread(void *arg)
 	close(c->fd);
 	c->fd = fd;
 	threadcreate(connoutthread, c, STACK);
-	while((m = mread9p(io, c->fd, c->dotu)) != nil){
+	while((m = mread9p(io, c->fd)) != nil){
 		if(verbose > 1) fprint(2, "%T fd#%d -> %F\n", c->fd, &m->tx);
 		m->c = c;
 		m->ctag = m->tx.tag;
@@ -398,11 +393,6 @@ connthread(void *arg)
 			if(m->rx.msize > msize)
 				m->rx.msize = msize;
 			m->rx.version = "9P2000";
-			c->dotu = 0;
-			if(dotu && strncmp(m->tx.version, "9P2000.u", 8) == 0){
-				m->rx.version = "9P2000.u";
-				c->dotu = 1;
-			}
 			m->rx.type = Rversion;
 			send9pmsg(m);
 			continue;
@@ -438,7 +428,7 @@ connthread(void *arg)
 				m->tx.afid = xafid;
 				m->tx.aname = xaname;
 				m->tx.uname = getuser();	/* what srv.c used */
-				repack(&m->tx, &m->tpkt, c->dotu);
+				repack(&m->tx, &m->tpkt);
 			}
 			break;
 		case Twalk:
@@ -476,7 +466,7 @@ connthread(void *arg)
 			m->afid->ref++;
 			break;
 		case Tcreate:
-			if(dotu && !c->dotu && (m->tx.perm&(DMSYMLINK|DMDEVICE|DMNAMEDPIPE|DMSOCKET))){
+			if(m->tx.perm&(DMSYMLINK|DMDEVICE|DMNAMEDPIPE|DMSOCKET)){
 				err(m, "unsupported file type");
 				continue;
 			}
@@ -503,18 +493,6 @@ connthread(void *arg)
 				continue;
 			}
 			m->fid->ref++;
-			if(m->tx.type==Twstat && dotu && !c->dotu){
-				if(cvtustat(&m->tx, &m->tpkt, 1) < 0){
-					err(m, "cannot convert stat buffer");
-					continue;
-				}
-			}
-			if(m->tx.type==Tread && m->fid->isdir && dotu && !c->dotu){
-				if(m->tx.offset = m->fid->coffset)
-					m->tx.offset = m->fid->offset;
-				else
-					m->fid->offset = m->fid->coffset;
-			}
 			break;
 		}
 
@@ -798,7 +776,6 @@ xopenfd(Msg *m)
 void
 connoutthread(void *arg)
 {
-	char *ename;
 	int err;
 	Conn *c;
 	Msg *m, *om;
@@ -844,28 +821,14 @@ connoutthread(void *arg)
 					fidput(m->newfid);
 			break;
 		case Tread:
-			if(!err && m->fid->isdir && dotu && !m->c->dotu){
-				m->fid->offset += m->rx.count;
-				stripudirread(m);
-				m->fid->coffset += m->rx.count;
-			}
 			break;
 		case Tstat:
-			if(!err && dotu && !m->c->dotu)
-				cvtustat(&m->rx, &m->rpkt, 0);
 			break;
 		case Topen:
 		case Tcreate:
 			m->fid->isdir = (m->rx.qid.type & QTDIR);
 			break;
 		}
-		if(m->rx.type==Rerror && dotu && !c->dotu){
-			ename = estrdup(m->rx.ename);
-			m->rx.ename = ename;
-			repack(&m->rx, &m->rpkt, c->dotu);
-			free(ename);
-			m->rx.ename = "XXX";
-		}
 		if(delhash(m->c->tag, m->ctag, m) == 0)
 			msgput(m);
 		if(verbose > 1) fprint(2, "%T fd#%d <- %F\n", c->fd, &m->rx);
@@ -933,7 +896,7 @@ inputthread(void *arg)
 			free(pkt);
 			continue;
 		}
-		if((nn = convM2Su(pkt, n, &m->rx, dotu)) != n){
+		if((nn = convM2S(pkt, n, &m->rx)) != n){
 			fprint(2, "%T bad packet - convM2S %d but %d\n", nn, n);
 			free(pkt);
 			msgput(m);
@@ -1270,7 +1233,7 @@ read9ppkt(Ioproc *io, int fd)
 }
 
 Msg*
-mread9p(Ioproc *io, int fd, int dotu)
+mread9p(Ioproc *io, int fd)
 {
 	int n, nn;
 	uchar *pkt;
@@ -1282,7 +1245,7 @@ mread9p(Ioproc *io, int fd, int dotu)
 	m = msgnew(0);
 	m->tpkt = pkt;
 	n = GBIT32(pkt);
-	nn = convM2Su(pkt, n, &m->tx, dotu);
+	nn = convM2S(pkt, n, &m->tx);
 	if(nn != n){
 		fprint(2, "%T read bad packet from %d\n", fd);
 		return nil;
@@ -1327,24 +1290,24 @@ restring(uchar *pkt, int pn, char *s)
 }
 
 void
-repack(Fcall *f, uchar **ppkt, int dotu)
+repack(Fcall *f, uchar **ppkt)
 {
 	uint n, nn;
 	uchar *pkt;
 	
 	pkt = *ppkt;
 	n = GBIT32(pkt);
-	nn = sizeS2Mu(f, dotu);
+	nn = sizeS2M(f);
 	if(nn > n){
 		free(pkt);
 		pkt = emalloc(nn);
 		*ppkt = pkt;
 	}
-	n = convS2Mu(f, pkt, nn, dotu);	
+	n = convS2M(f, pkt, nn);	
 	if(n <= BIT16SZ)
 		sysfatal("convS2M conversion error");
 	if(n != nn)
-		sysfatal("convS2Mu and sizeS2Mu disagree");
+		sysfatal("convS2M and sizeS2M disagree");
 }
 
 void
@@ -1446,90 +1409,3 @@ timefmt(Fmt *fmt)
 		mon[tm.mon], tm.mday, tm.hour, tm.min, tm.sec,
 		(int)(ns%1000000000)/1000000);
 }
-
-int
-cvtustat(Fcall *f, uchar **fpkt, int tounix)
-{
-	int n;
-	uchar *buf;
-	char *str;
-	Dir dir;
-
-	str = emalloc(f->nstat);
-	n = convM2Du(f->stat, f->nstat, &dir, str, !tounix);
-	if(n <= BIT16SZ){
-		free(str);
-		return -1;
-	}
-
-	n = sizeD2Mu(&dir, tounix);
-	buf = emalloc(n);
-	if(convD2Mu(&dir, buf, n, tounix) != n)
-		sysfatal("convD2Mu conversion error");
-	f->nstat = n;
-	f->stat = buf;
-
-	repack(f, fpkt, dotu);
-	free(buf);
-	f->stat = nil;	/* is this okay ??? */
-	free(str);
-
-	return 0;
-}
-
-int
-stripudirread(Msg* msg)
-{
-	char *str;
-	int i, m, n, nn;
-	uchar *buf;
-	Dir d;
-	Fcall* rx;
-
-	buf = nil;
-	str = nil;
-	rx = &msg->rx;
-	n = 0;
-	nn = 0;
-	for(i = 0; i < rx->count; i += m){
-		m = BIT16SZ + GBIT16(&rx->data[i]);
-		if(statchecku((uchar*)&rx->data[i], m, 1) < 0)
-			return -1;
-		if(nn < m)
-			nn = m;
-		n++;
-	}
-
-	str = emalloc(nn);
-	buf = emalloc(rx->count);
-
-	nn = 0;
-	for(i = 0; i < rx->count; i += m){
-		m = BIT16SZ + GBIT16(&rx->data[i]);
-		if(convM2Du((uchar*)&rx->data[i], m, &d, str, 1) != m){
-			free(buf);
-			free(str);
-			return -1;
-		}
-
-		n = convD2M(&d, &buf[nn], rx->count - nn);
-		if(n <= BIT16SZ){
-			free(buf);
-			free(str);
-			return -1;
-		}
-
-		nn += n;
-	}
-
-	rx->count = nn;
-	rx->data = (char*)buf;
-
-	repack(&msg->rx, &msg->rpkt, 0);
-	free(str);
-	free(buf);
-	rx->data = nil;	/* is this okay ??? */
-
-	return 0;
-}
-
diff --git a/src/cmd/vac/vacfs.c b/src/cmd/vac/vacfs.c
index 3edb63bd..231c4164 100644
--- a/src/cmd/vac/vacfs.c
+++ b/src/cmd/vac/vacfs.c
@@ -2,13 +2,6 @@
 #include <fcall.h>
 #include "vac.h"
 
-#ifndef PLAN9PORT
-#define convM2Su(a, b, c, d) convM2S(a, b, c)
-#define convS2Mu(a, b, c, d) convS2M(a, b, c)
-#define convM2Du(a, b, c, d) convM2D(a, b, c)
-#define convD2Mu(a, b, c, d) convD2M(a, b, c)
-#endif
-
 typedef struct Fid Fid;
 
 enum
@@ -50,7 +43,6 @@ Fcall	thdr;
 VacFs	*fs;
 VtConn  *conn;
 int	noperm;
-int	dotu;
 char *defmnt;
 
 Fid *	newfid(int);
@@ -306,10 +298,6 @@ rversion(Fid *unused)
 	if(strncmp(rhdr.version, "9P2000", 6) != 0)
 		return vtstrdup("unrecognized 9P version");
 	thdr.version = "9P2000";
-	if(strncmp(rhdr.version, "9P2000.u", 8) == 0){
-		dotu = 1;
-		thdr.version = "9P2000.u";
-	}
 	return nil;
 }
 
@@ -719,7 +707,7 @@ vacstat(VacFile *parent, VacDir *vd, uchar *p, int np)
 	dir.gidnum = atoi(vd->gid);
 #endif
 
-	ret = convD2Mu(&dir, p, np, dotu);
+	ret = convD2M(&dir, p, np);
 #ifdef PLAN9PORT
 	free(ext);
 #endif
@@ -796,7 +784,7 @@ io(void)
 		n = read9pmsg(mfd[0], mdata, sizeof mdata);
 		if(n <= 0)
 			break;
-		if(convM2Su(mdata, n, &rhdr, dotu) != n)
+		if(convM2S(mdata, n, &rhdr) != n)
 			sysfatal("convM2S conversion error");
 
 		if(dflag)
@@ -820,9 +808,9 @@ io(void)
 		thdr.tag = rhdr.tag;
 		if(dflag)
 			fprint(2, "vacfs:->%F\n", &thdr);
-		n = convS2Mu(&thdr, mdata, messagesize, dotu);
+		n = convS2M(&thdr, mdata, messagesize);
 		if(n <= BIT16SZ)
-			sysfatal("convS2Mu conversion error");
+			sysfatal("convS2M conversion error");
 		if(err)
 			vtfree(err);
 
diff --git a/src/lib9/convD2M.c b/src/lib9/convD2M.c
index bd8a30b6..30c0d496 100644
--- a/src/lib9/convD2M.c
+++ b/src/lib9/convD2M.c
@@ -3,7 +3,7 @@
 #include	<fcall.h>
 
 uint
-sizeD2Mu(Dir *d, int dotu)
+sizeD2M(Dir *d)
 {
 	char *sv[5];
 	int i, ns, nstr, fixlen;
@@ -15,11 +15,6 @@ sizeD2Mu(Dir *d, int dotu)
 	
 	fixlen = STATFIXLEN;
 	nstr = 4;
-	if(dotu){
-		fixlen = STATFIXLENU;
-		sv[4] = d->ext;
-		nstr = 5;
-	}
 	
 	ns = 0;
 	for(i = 0; i < nstr; i++)
@@ -30,13 +25,7 @@ sizeD2Mu(Dir *d, int dotu)
 }
 
 uint
-sizeD2M(Dir *d)
-{
-	return sizeD2Mu(d, 0);
-}
-
-uint
-convD2Mu(Dir *d, uchar *buf, uint nbuf, int dotu)
+convD2M(Dir *d, uchar *buf, uint nbuf)
 {
 	uchar *p, *ebuf;
 	char *sv[5];
@@ -55,11 +44,6 @@ convD2Mu(Dir *d, uchar *buf, uint nbuf, int dotu)
 
 	fixlen = STATFIXLEN;
 	nstr = 4;
-	if(dotu){
-		fixlen = STATFIXLENU;
-		sv[4] = d->ext;
-		nstr = 5;
-	}
 	
 	ns = 0;
 	for(i = 0; i < nstr; i++){
@@ -110,23 +94,8 @@ convD2Mu(Dir *d, uchar *buf, uint nbuf, int dotu)
 		p += ns;
 	}
 	
-	if(dotu){
-		PBIT32(p, d->uidnum);
-		p += BIT32SZ;
-		PBIT32(p, d->gidnum);
-		p += BIT32SZ;
-		PBIT32(p, d->muidnum);
-		p += BIT32SZ;
-	}
-
 	if(ss != p - buf)
 		return 0;
 
 	return p - buf;
 }
-
-uint
-convD2M(Dir *d, uchar *buf, uint nbuf)
-{
-	return convD2Mu(d, buf, nbuf, 0);
-}
diff --git a/src/lib9/convM2D.c b/src/lib9/convM2D.c
index 52d7fad5..504110b2 100644
--- a/src/lib9/convM2D.c
+++ b/src/lib9/convM2D.c
@@ -3,7 +3,7 @@
 #include	<fcall.h>
 
 int
-statchecku(uchar *buf, uint nbuf, int dotu)
+statcheck(uchar *buf, uint nbuf)
 {
 	uchar *ebuf;
 	int i, nstr;
@@ -16,33 +16,22 @@ statchecku(uchar *buf, uint nbuf, int dotu)
 	buf += STATFIXLEN - 4 * BIT16SZ;
 
 	nstr = 4;
-	if(dotu)
-		nstr = 5;
 	for(i = 0; i < nstr; i++){
 		if(buf + BIT16SZ > ebuf)
 			return -1;
 		buf += BIT16SZ + GBIT16(buf);
 	}
 
-	if(dotu)
-		buf += 3*BIT32SZ;
-
 	if(buf != ebuf)
 		return -1;
 
 	return 0;
 }
 
-int
-statcheck(uchar *buf, uint nbuf)
-{
-	return statchecku(buf, nbuf, 0);
-}
-
 static char nullstring[] = "";
 
 uint
-convM2Du(uchar *buf, uint nbuf, Dir *d, char *strs, int dotu)
+convM2D(uchar *buf, uint nbuf, Dir *d, char *strs)
 {
 	uchar *p, *ebuf;
 	char *sv[5];
@@ -75,8 +64,6 @@ convM2Du(uchar *buf, uint nbuf, Dir *d, char *strs, int dotu)
 	p += BIT64SZ;
 
 	nstr = 4;
-	if(dotu)
-		nstr = 5;
 	for(i = 0; i < nstr; i++){
 		if(p + BIT16SZ > ebuf)
 			return 0;
@@ -93,25 +80,12 @@ convM2Du(uchar *buf, uint nbuf, Dir *d, char *strs, int dotu)
 		p += ns;
 	}
 
-	if(dotu){
-		if(p + BIT32SZ*3 > ebuf)
-			return 0;
-		d->uidnum = GBIT32(p);
-		p += BIT32SZ;
-		d->gidnum = GBIT32(p);
-		p += BIT32SZ;
-		d->muidnum = GBIT32(p);
-		p += BIT32SZ;
-	}
-	
 	if(strs){
 		d->name = sv[0];
 		d->uid = sv[1];
 		d->gid = sv[2];
 		d->muid = sv[3];
 		d->ext = nullstring;
-		if(dotu)
-			d->ext = sv[4];
 	}else{
 		d->name = nullstring;
 		d->uid = nullstring;
@@ -122,9 +96,3 @@ convM2Du(uchar *buf, uint nbuf, Dir *d, char *strs, int dotu)
 	
 	return p - buf;
 }
-
-uint
-convM2D(uchar *buf, uint nbuf, Dir *d, char *strs)
-{
-	return convM2Du(buf, nbuf, d, strs, 0);
-}
diff --git a/src/lib9/convM2S.c b/src/lib9/convM2S.c
index 6a8805c4..a9c9205d 100644
--- a/src/lib9/convM2S.c
+++ b/src/lib9/convM2S.c
@@ -48,7 +48,7 @@ gqid(uchar *p, uchar *ep, Qid *q)
  * to test at end of routine.
  */
 uint
-convM2Su(uchar *ap, uint nap, Fcall *f, int dotu)
+convM2S(uchar *ap, uint nap, Fcall *f)
 {
 	uchar *p, *ep;
 	uint i, size;
@@ -101,12 +101,6 @@ convM2Su(uchar *ap, uint nap, Fcall *f, int dotu)
 		if(p == nil)
 			break;
 		f->uidnum = NOUID;
-		if(dotu){
-			if(p+BIT32SZ > ep)
-				return 0;
-			f->uidnum = GBIT32(p);
-			p += BIT32SZ;
-		}
 		break;
 
 	case Tattach:
@@ -125,12 +119,6 @@ convM2Su(uchar *ap, uint nap, Fcall *f, int dotu)
 		if(p == nil)
 			break;
 		f->uidnum = NOUID;
-		if(dotu){
-			if(p+BIT32SZ > ep)
-				return 0;
-			f->uidnum = GBIT32(p);
-			p += BIT32SZ;
-		}
 		break;
 
 	case Twalk:
@@ -175,8 +163,6 @@ convM2Su(uchar *ap, uint nap, Fcall *f, int dotu)
 		p += BIT32SZ;
 		f->mode = GBIT8(p);
 		p += BIT8SZ;
-		if(dotu)
-			p = gstring(p, ep, &f->extension);
 		break;
 
 	case Tread:
@@ -246,12 +232,6 @@ convM2Su(uchar *ap, uint nap, Fcall *f, int dotu)
 	case Rerror:
 		p = gstring(p, ep, &f->ename);
 		f->errornum = 0;
-		if(dotu){
-			if(p+BIT32SZ > ep)
-				return 0;
-			f->errornum = GBIT32(p);
-			p += BIT32SZ;
-		}
 		break;
 
 	case Rflush:
@@ -344,9 +324,3 @@ convM2Su(uchar *ap, uint nap, Fcall *f, int dotu)
 		return size;
 	return 0;
 }
-
-uint
-convM2S(uchar *ap, uint nap, Fcall *f)
-{
-	return convM2Su(ap, nap, f, 0);
-}
diff --git a/src/lib9/convS2M.c b/src/lib9/convS2M.c
index 02923bd4..6e9d2719 100644
--- a/src/lib9/convS2M.c
+++ b/src/lib9/convS2M.c
@@ -46,7 +46,7 @@ stringsz(char *s)
 }
 
 uint
-sizeS2Mu(Fcall *f, int dotu)
+sizeS2M(Fcall *f)
 {
 	uint n;
 	int i;
@@ -74,8 +74,6 @@ sizeS2Mu(Fcall *f, int dotu)
 		n += BIT32SZ;
 		n += stringsz(f->uname);
 		n += stringsz(f->aname);
-		if(dotu)
-			n += BIT32SZ;
 		break;
 
 	case Tattach:
@@ -83,8 +81,6 @@ sizeS2Mu(Fcall *f, int dotu)
 		n += BIT32SZ;
 		n += stringsz(f->uname);
 		n += stringsz(f->aname);
-		if(dotu)
-			n += BIT32SZ;
 		break;
 
 	case Twalk:
@@ -106,8 +102,6 @@ sizeS2Mu(Fcall *f, int dotu)
 		n += stringsz(f->name);
 		n += BIT32SZ;
 		n += BIT8SZ;
-		if(dotu)
-			n += stringsz(f->extension);
 		break;
 
 	case Tread:
@@ -147,8 +141,6 @@ sizeS2Mu(Fcall *f, int dotu)
 
 	case Rerror:
 		n += stringsz(f->ename);
-		if(dotu)
-			n += BIT32SZ;
 		break;
 
 	case Rflush:
@@ -206,18 +198,12 @@ sizeS2Mu(Fcall *f, int dotu)
 }
 
 uint
-sizeS2M(Fcall *f)
-{
-	return sizeS2Mu(f, 0);
-}
-
-uint
-convS2Mu(Fcall *f, uchar *ap, uint nap, int dotu)
+convS2M(Fcall *f, uchar *ap, uint nap)
 {
 	uchar *p;
 	uint i, size;
 
-	size = sizeS2Mu(f, dotu);
+	size = sizeS2M(f);
 	if(size == 0)
 		return 0;
 	if(size > nap)
@@ -253,11 +239,6 @@ convS2Mu(Fcall *f, uchar *ap, uint nap, int dotu)
 		p += BIT32SZ;
 		p  = pstring(p, f->uname);
 		p  = pstring(p, f->aname);
-		if(dotu){
-			f->uidnum = NOUID;
-			PBIT32(p, f->uidnum);
-			p += BIT32SZ;
-		}
 		break;
 
 	case Tattach:
@@ -267,11 +248,6 @@ convS2Mu(Fcall *f, uchar *ap, uint nap, int dotu)
 		p += BIT32SZ;
 		p  = pstring(p, f->uname);
 		p  = pstring(p, f->aname);
-		if(dotu){
-			f->uidnum = NOUID;
-			PBIT32(p, f->uidnum);
-			p += BIT32SZ;
-		}
 		break;
 
 	case Twalk:
@@ -303,8 +279,6 @@ convS2Mu(Fcall *f, uchar *ap, uint nap, int dotu)
 		p += BIT32SZ;
 		PBIT8(p, f->mode);
 		p += BIT8SZ;
-		if(dotu)
-			p = pstring(p, f->extension);
 		break;
 
 	case Tread:
@@ -357,10 +331,6 @@ convS2Mu(Fcall *f, uchar *ap, uint nap, int dotu)
 
 	case Rerror:
 		p = pstring(p, f->ename);
-		if(dotu){
-			PBIT32(p, f->errornum);
-			p += BIT32SZ;
-		}
 		break;
 
 	case Rflush:
@@ -427,9 +397,3 @@ convS2Mu(Fcall *f, uchar *ap, uint nap, int dotu)
 		return 0;
 	return size;
 }
-
-uint
-convS2M(Fcall *f, uchar *ap, uint nap)
-{
-	return convS2Mu(f, ap, nap, 0);
-}
diff --git a/src/lib9p/dirread.c b/src/lib9p/dirread.c
index 52fdb731..aaaa141a 100644
--- a/src/lib9p/dirread.c
+++ b/src/lib9p/dirread.c
@@ -24,7 +24,7 @@ dirread9p(Req *r, Dirgen *gen, void *aux)
 		memset(&d, 0, sizeof d);
 		if((*gen)(start, &d, aux) < 0)
 			break;
-		rv = convD2Mu(&d, p, ep-p, r->srv->dotu);
+		rv = convD2M(&d, p, ep-p);
 		free(d.name);
 		free(d.muid);
 		free(d.uid);
diff --git a/src/lib9p/srv.c b/src/lib9p/srv.c
index ece35940..a857375c 100644
--- a/src/lib9p/srv.c
+++ b/src/lib9p/srv.c
@@ -67,7 +67,7 @@ getreq(Srv *s)
 	memmove(buf, s->rbuf, n);
 	qunlock(&s->rlock);
 
-	if(convM2Su(buf, n, &f, s->dotu) != n){
+	if(convM2S(buf, n, &f) != n){
 		free(buf);
 		return nil;
 	}
@@ -166,22 +166,16 @@ sversion(Srv *srv, Req *r)
 {
 	USED(srv);
 
-	if(strncmp(r->ifcall.version, "9P", 2) != 0){
+	if(strncmp(r->ifcall.version, "9P2000", 6) != 0){
 		r->ofcall.version = "unknown";
 		respond(r, nil);
 		return;
 	}
-
-	if(strncmp(r->ifcall.version, "9P2000.u", 8) == 0){
-		r->ofcall.version = "9P2000.u";
-		srv->dotu = 1;
-	}else{
-		r->ofcall.version = "9P2000";
-		srv->dotu = 0;
-	}
+	r->ofcall.version = "9P2000";
 	r->ofcall.msize = r->ifcall.msize;
 	respond(r, nil);
 }
+
 static void
 rversion(Req *r, char *error)
 {
@@ -205,6 +199,7 @@ sauth(Srv *srv, Req *r)
 		respond(r, e);
 	}
 }
+
 static void
 rauth(Req *r, char *error)
 {
@@ -237,6 +232,7 @@ sattach(Srv *srv, Req *r)
 		respond(r, nil);
 	return;
 }
+
 static void
 rattach(Req *r, char *error)
 {
@@ -255,6 +251,7 @@ sflush(Srv *srv, Req *r)
 	else
 		respond(r, nil);
 }
+
 static int
 rflush(Req *r, char *error)
 {
@@ -422,6 +419,7 @@ sopen(Srv *srv, Req *r)
 	else
 		respond(r, nil);
 }
+
 static void
 ropen(Req *r, char *error)
 {
@@ -454,6 +452,7 @@ screate(Srv *srv, Req *r)
 	else
 		respond(r, Enocreate);
 }
+
 static void
 rcreate(Req *r, char *error)
 {
@@ -501,6 +500,7 @@ sread(Srv *srv, Req *r)
 	else
 		respond(r, "no srv->read");
 }
+
 static void
 rread(Req *r, char *error)
 {
@@ -630,8 +630,8 @@ rstat(Req *r, char *error)
 
 	if(error)
 		return;
-	if(convD2Mu(&r->d, tmp, BIT16SZ, r->srv->dotu) != BIT16SZ){
-		r->error = "convD2Mu(_,_,BIT16SZ,_) did not return BIT16SZ";
+	if(convD2M(&r->d, tmp, BIT16SZ) != BIT16SZ){
+		r->error = "convD2M(_,_,BIT16SZ) did not return BIT16SZ";
 		return;
 	}
 	n = GBIT16(tmp)+BIT16SZ;
@@ -640,10 +640,10 @@ rstat(Req *r, char *error)
 		r->error = "out of memory";
 		return;
 	}
-	r->ofcall.nstat = convD2Mu(&r->d, statbuf, n, r->srv->dotu);
+	r->ofcall.nstat = convD2M(&r->d, statbuf, n);
 	r->ofcall.stat = statbuf;	/* freed in closereq */
 	if(r->ofcall.nstat <= BIT16SZ){
-		r->error = "convD2Mu fails";
+		r->error = "convD2M fails";
 		free(statbuf);
 		return;
 	}
@@ -660,7 +660,7 @@ swstat(Srv *srv, Req *r)
 		respond(r, Enowstat);
 		return;
 	}
-	if(convM2Du(r->ifcall.stat, r->ifcall.nstat, &r->d, (char*)r->ifcall.stat, srv->dotu) != r->ifcall.nstat){
+	if(convM2D(r->ifcall.stat, r->ifcall.nstat, &r->d, (char*)r->ifcall.stat) != r->ifcall.nstat){
 		respond(r, Ebaddir);
 		return;
 	}
@@ -686,6 +686,7 @@ swstat(Srv *srv, Req *r)
 	}
 	srv->wstat(r);
 }
+
 static void
 rwstat(Req *r, char *msg)
 {
@@ -801,7 +802,7 @@ if(chatty9p)
 	fprint(2, "-%d-> %F\n", srv->outfd, &r->ofcall);
 
 	qlock(&srv->wlock);
-	n = convS2Mu(&r->ofcall, srv->wbuf, srv->msize, srv->dotu);
+	n = convS2M(&r->ofcall, srv->wbuf, srv->msize);
 	if(n <= 0){
 		fprint(2, "n = %d %F\n", n, &r->ofcall);
 		abort();
diff --git a/src/lib9pclient/dirread.c b/src/lib9pclient/dirread.c
index c2b13882..32c59783 100644
--- a/src/lib9pclient/dirread.c
+++ b/src/lib9pclient/dirread.c
@@ -7,7 +7,7 @@
 #include "fsimpl.h"
 
 static long
-dirpackage(uchar *buf, long ts, Dir **d, int dotu)
+dirpackage(uchar *buf, long ts, Dir **d)
 {
 	char *s;
 	long ss, i, n, nn, m;
@@ -23,7 +23,7 @@ dirpackage(uchar *buf, long ts, Dir **d, int dotu)
 	n = 0;
 	for(i = 0; i < ts; i += m){
 		m = BIT16SZ + GBIT16(&buf[i]);
-		if(statchecku(&buf[i], m, dotu) < 0)
+		if(statcheck(&buf[i], m) < 0)
 			break;
 		ss += m;
 		n++;
@@ -43,7 +43,7 @@ dirpackage(uchar *buf, long ts, Dir **d, int dotu)
 	nn = 0;
 	for(i = 0; i < ts; i += m){
 		m = BIT16SZ + GBIT16((uchar*)&buf[i]);
-		if(nn >= n || convM2Du(&buf[i], m, *d + nn, s, dotu) != m){
+		if(nn >= n || convM2D(&buf[i], m, *d + nn, s) != m){
 			free(*d);
 			*d = nil;
 			return -1;
@@ -66,7 +66,7 @@ fsdirread(CFid *fid, Dir **d)
 		return -1;
 	ts = fsread(fid, buf, DIRMAX);
 	if(ts >= 0)
-		ts = dirpackage(buf, ts, d, fid->fs->dotu);
+		ts = dirpackage(buf, ts, d);
 	free(buf);
 	return ts;
 }
@@ -92,9 +92,9 @@ fsdirreadall(CFid *fid, Dir **d)
 		ts += n;
 	}
 	if(ts >= 0){
-		ts = dirpackage(buf, ts, d, fid->fs->dotu);
+		ts = dirpackage(buf, ts, d);
 		if(ts < 0)
-			werrstr("malformed directory contents [dotu=%d]", fid->fs->dotu);
+			werrstr("malformed directory contents");
 	}
 	free(buf);
 	if(ts == 0 && n < 0)
diff --git a/src/lib9pclient/fs.c b/src/lib9pclient/fs.c
index 169f1206..c6b1c3e9 100644
--- a/src/lib9pclient/fs.c
+++ b/src/lib9pclient/fs.c
@@ -49,14 +49,12 @@ fsinit(int fd)
 	fs->iosend = ioproc();
 	muxinit(&fs->mux);
 	
-	strcpy(fs->version, "9P2000.u");
+	strcpy(fs->version, "9P2000");
 	if((n = fsversion(fs, 8192, fs->version, sizeof fs->version)) < 0){
 		werrstr("fsversion: %r");
 		_fsunmount(fs);
 		return nil;
 	}
-	if(strcmp(fs->version, "9P2000.u") == 0)
-		fs->dotu = 1;
 	fs->msize = n;
 	return fs;
 }
@@ -208,7 +206,7 @@ _fsrpc(CFsys *fs, Fcall *tx, Fcall *rx, void **freep)
 	int n, nn;
 	void *tpkt, *rpkt;
 
-	n = sizeS2Mu(tx, fs->dotu);
+	n = sizeS2M(tx);
 	tpkt = malloc(n);
 	if(freep)
 		*freep = nil;
@@ -217,7 +215,7 @@ _fsrpc(CFsys *fs, Fcall *tx, Fcall *rx, void **freep)
 	tx->tag = 0;
 	if(chatty9pclient)
 		fprint(2, "<- %F\n", tx);
-	nn = convS2Mu(tx, tpkt, n, fs->dotu);
+	nn = convS2M(tx, tpkt, n);
 	if(nn != n){
 		free(tpkt);
 		werrstr("lib9pclient: sizeS2M convS2M mismatch");
@@ -231,7 +229,7 @@ _fsrpc(CFsys *fs, Fcall *tx, Fcall *rx, void **freep)
 		return -1;
 	}
 	n = GBIT32((uchar*)rpkt);
-	nn = convM2Su(rpkt, n, rx, fs->dotu);
+	nn = convM2S(rpkt, n, rx);
 	if(nn != n){
 		free(rpkt);
 		werrstr("lib9pclient: convM2S packet size mismatch %d %d", n, nn);
diff --git a/src/lib9pclient/fsimpl.h b/src/lib9pclient/fsimpl.h
index d609dde8..9c5c5553 100644
--- a/src/lib9pclient/fsimpl.h
+++ b/src/lib9pclient/fsimpl.h
@@ -14,7 +14,6 @@ void *_fsnbqrecv(Queue*);
 struct CFsys
 {
 	char version[20];
-	int dotu;
 	int msize;
 	QLock lk;
 	int fd;
diff --git a/src/lib9pclient/stat.c b/src/lib9pclient/stat.c
index 594f8be1..9c69446a 100644
--- a/src/lib9pclient/stat.c
+++ b/src/lib9pclient/stat.c
@@ -42,7 +42,7 @@ fsdirfstat(CFid *fid)
 		free(freep);
 		return nil;
 	}
-	n = convM2Du(rx.stat, rx.nstat, d, (char*)&d[1], fs->dotu);
+	n = convM2D(rx.stat, rx.nstat, d, (char*)&d[1]);
 	free(freep);
 	if(n != rx.nstat){
 		free(d);
diff --git a/src/lib9pclient/wstat.c b/src/lib9pclient/wstat.c
index cc193d25..26e44f8e 100644
--- a/src/lib9pclient/wstat.c
+++ b/src/lib9pclient/wstat.c
@@ -28,11 +28,11 @@ fsdirfwstat(CFid *fid, Dir *d)
 	int n, nn;
 	Fcall tx, rx;
 
-	n = sizeD2Mu(d, fid->fs->dotu);
+	n = sizeD2M(d);
 	a = malloc(n);
 	if(a == nil)
 		return -1;
-	nn = convD2Mu(d, a, n, fid->fs->dotu);
+	nn = convD2M(d, a, n);
 	if(n != nn){
 		werrstr("convD2M and sizeD2M disagree");
 		free(a);