code: drawterm

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use 32k IOUNIT for 9p

--- a/exportfs/exportfs.c

+++ b/exportfs/exportfs.c

@@ -56,7 +56,7 @@

 	messagesize = iounit(netfd);

 	if(messagesize == 0)

-		messagesize = 8192+IOHDRSZ;

+		messagesize = IOUNIT+IOHDRSZ;

 	Workq = emallocz(sizeof(Fsrpc)*Nr_workbufs);

 //	for(i=0; i<Nr_workbufs; i++)

--- a/include/lib.h

+++ b/include/lib.h

@@ -109,6 +109,7 @@

 #define	ERRMAX			128	/* max length of error string */

 #define	KNAMELEN		28	/* max length of name held in kernel */

+#define IOUNIT			32768	/* default buffer size for 9p io */

 /* bits in Qid.type */

 #define QTDIR		0x80		/* type bit for directories */

--- a/kern/devmnt.c

+++ b/kern/devmnt.c

@@ -15,7 +15,8 @@

  * connection.

  */

-#define MAXRPC (IOHDRSZ+8192)

+#define MAXRPC	(IOHDRSZ+32768)

+#define MAXRPC0 (IOHDRSZ+8192)	/* maximum size of Tversion/Rversion pair */

 struct Mntrpc

 {

@@ -140,7 +141,7 @@

 	f.tag = NOTAG;

 	f.msize = msize;

 	f.version = v;

-	msg = malloc(8192+IOHDRSZ);

+	msg = malloc(MAXRPC0);

 	if(msg == nil)

 		exhausted("version memory");

 	if(waserror()){

@@ -147,7 +148,7 @@

 		free(msg);

 		nexterror();

 	}

-	k = convS2M(&f, msg, 8192+IOHDRSZ);

+	k = convS2M(&f, msg, MAXRPC0);

 	if(k == 0)

 		error("bad fversion conversion on send");

@@ -165,8 +166,8 @@

 	}

 	/* message sent; receive and decode reply */

-	for(k = 0; k < BIT32SZ || (k < GBIT32(msg) && k < 8192+IOHDRSZ); k += l){

-		l = devtab[c->type]->read(c, msg+k, 8192+IOHDRSZ-k, c->offset);

+	for(k = 0; k < BIT32SZ || (k < GBIT32(msg) && k < MAXRPC0); k += l){

+		l = devtab[c->type]->read(c, msg+k, MAXRPC0-k, c->offset);

 		if(l <= 0)

 			error("EOF receiving fversion reply");

 		lock(&c->ref.lk);

--- a/kern/devtls.c

+++ b/kern/devtls.c

@@ -482,7 +482,17 @@

 	c->mode = openmode(omode);

 	c->flag |= COPEN;

 	c->offset = 0;

-	c->iounit = MaxRecLen;

+	switch(t){

+	case Qdata:

+		c->iounit = qiomaxatomic;

+		break;

+	case Qhand:

+		c->iounit = MaxRecLen;

+		break;

+	default:

+		c->iounit = 0;

+		break;

+	}

 	return c;

 }

@@ -1344,6 +1354,8 @@

 		if(waserror()){

 			if(strcmp(up->errstr, "interrupted") != 0)

 				tlsError(tr, "channel error");

+			else if(bb != nil)

+				continue;

 			nexterror();

 		}

 		devtab[tr->c->type]->bwrite(tr->c, nb, 0);

@@ -1590,6 +1602,7 @@

 			b->wp += m;

 			tlsbwrite(c, b, offset);

+			offset += m;

 			p += m;

 		}while(p < e);