Import 0.99.14v

Makefile

 VERSION = 0.99
 PATCHLEVEL = 14
-ALPHA = u
+ALPHA = v
 
 all:	Version zImage
 

drivers/FPU-emu/errors.c

@@ -38,7 +38,8 @@ void Un_impl(void)
 {
   unsigned char byte1, FPU_modrm;
 
-  RE_ENTRANT_CHECK_OFF
+  RE_ENTRANT_CHECK_OFF;
+  /* No need to verify_area(), we have previously fetched these bytes. */
   byte1 = get_fs_byte((unsigned char *) FPU_ORIG_EIP);
   FPU_modrm = get_fs_byte(1 + (unsigned char *) FPU_ORIG_EIP);
 
@@ -49,7 +50,7 @@ void Un_impl(void)
     printk("%02x (%02x+%d)\n", FPU_modrm, FPU_modrm & 0xf8, FPU_modrm & 7);
   else
     printk("/%d\n", (FPU_modrm >> 3) & 7);
-  RE_ENTRANT_CHECK_ON
+  RE_ENTRANT_CHECK_ON;
 
   EXCEPTION(EX_Invalid);
 
@@ -65,7 +66,8 @@ void emu_printall()
                               "DeNorm", "Inf", "NaN", "Empty" };
   unsigned char byte1, FPU_modrm;
 
-  RE_ENTRANT_CHECK_OFF
+  RE_ENTRANT_CHECK_OFF;
+  /* No need to verify_area(), we have previously fetched these bytes. */
   byte1 = get_fs_byte((unsigned char *) FPU_ORIG_EIP);
   FPU_modrm = get_fs_byte(1 + (unsigned char *) FPU_ORIG_EIP);
   partial_status = status_word();
@@ -154,7 +156,7 @@ printk(" CW: ic=%d rc=%ld%ld pc=%ld%ld iem=%d     ef=%d%d%d%d%d%d\n",
 	 (long)(FPU_loaded_data.sigl & 0xFFFF),
 	 FPU_loaded_data.exp - EXP_BIAS + 1);
   printk("%s\n", tag_desc[(int) (unsigned) FPU_loaded_data.tag]);
-  RE_ENTRANT_CHECK_ON
+  RE_ENTRANT_CHECK_ON;
 
 }
 
@@ -261,7 +263,7 @@ void exception(int n)
 	}
     }
 
-  RE_ENTRANT_CHECK_OFF
+  RE_ENTRANT_CHECK_OFF;
   if ( (~control_word & n & CW_Exceptions) || (n == EX_INTERNAL) )
     {
 #ifdef PRINT_MESSAGES
@@ -303,7 +305,7 @@ void exception(int n)
        */
 /*      regs[0].tag |= TW_FPU_Interrupt; */
     }
-  RE_ENTRANT_CHECK_ON
+  RE_ENTRANT_CHECK_ON;
 
 #ifdef __DEBUG__
   math_abort(FPU_info,SIGFPE);

drivers/FPU-emu/fpu_emu.h

 /*---------------------------------------------------------------------------+
  |  fpu_emu.h                                                                |
  |                                                                           |
- | Copyright (C) 1992,1993                                                   |
+ | Copyright (C) 1992,1993,1994                                              |
  |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
  |                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au    |
  |                                                                           |
@@ -62,8 +62,8 @@
 
 #ifdef PARANOID
 extern char emulating;
-#  define RE_ENTRANT_CHECK_OFF emulating = 0;
-#  define RE_ENTRANT_CHECK_ON emulating = 1;
+#  define RE_ENTRANT_CHECK_OFF emulating = 0
+#  define RE_ENTRANT_CHECK_ON emulating = 1
 #else
 #  define RE_ENTRANT_CHECK_OFF
 #  define RE_ENTRANT_CHECK_ON

drivers/FPU-emu/fpu_entry.c

@@ -209,6 +209,7 @@ asmlinkage void math_emulate(long arg)
 do_another_FPU_instruction:
 
   RE_ENTRANT_CHECK_OFF;
+  FPU_code_verify_area(1);
   code = get_fs_word((unsigned short *) FPU_EIP);
   RE_ENTRANT_CHECK_ON;
 
@@ -301,6 +302,7 @@ asmlinkage void math_emulate(long arg)
     {
       FPU_EIP++;
       RE_ENTRANT_CHECK_OFF;
+      FPU_code_verify_area(1);
       code = get_fs_word((unsigned short *) FPU_EIP);
       RE_ENTRANT_CHECK_ON;
     }
@@ -560,6 +562,7 @@ asmlinkage void math_emulate(long arg)
       unsigned char next;
 
       RE_ENTRANT_CHECK_OFF;
+      FPU_code_verify_area(1);
       next = get_fs_byte((unsigned char *) FPU_EIP);
       RE_ENTRANT_CHECK_ON;
       if ( valid_prefix(next) )
@@ -591,8 +594,10 @@ static int valid_prefix(unsigned char byte)
 	case PREFIX_GS:
 
 	case OP_SIZE_PREFIX:  /* Used often by gcc, but has no effect. */
+	  FPU_EIP++;
 	  RE_ENTRANT_CHECK_OFF;
-	  byte = get_fs_byte((unsigned char *) (++FPU_EIP));
+	  FPU_code_verify_area(1);
+	  byte = get_fs_byte((unsigned char *) (FPU_EIP));
 	  RE_ENTRANT_CHECK_ON;
 	  break;
 	case FWAIT_OPCODE:

drivers/FPU-emu/fpu_system.h

 /*---------------------------------------------------------------------------+
  |  fpu_system.h                                                             |
  |                                                                           |
- | Copyright (C) 1992    W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
+ | Copyright (C) 1992,1994                                                   |
+ |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
  |                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au    |
  |                                                                           |
  +---------------------------------------------------------------------------*/
@@ -41,6 +42,23 @@
 #define data_operand_offset	(I387.soft.foo)
 #define operand_selector	(I387.soft.fos)
 
+#define FPU_verify_area(x,y,z)  if ( verify_area(x,y,z) ) \
+                                math_abort(FPU_info,SIGSEGV)
+
+#undef FPU_IGNORE_CODE_SEGV
+#ifdef FPU_IGNORE_CODE_SEGV
+/* verify_area() is very expensive, and causes the emulator to run
+   about 20% slower if applied to the code. Anyway, errors due to bad
+   code addresses should be much rarer than errors due to bad data
+   addresses. */
+#define	FPU_code_verify_area(z)
+#else
+/* A simpler test than verify_area() can probably be done for
+   FPU_code_verify_area() because the only possible error is to step
+   past the upper boundary of a legal code area. */
+#define	FPU_code_verify_area(z) FPU_verify_area(VERIFY_READ,(void *)FPU_EIP,z)
+#endif
+
 /* ######## temporary and ugly ;-) */
 #define FPU_data_address        ((void *)(I387.soft.twd))
 

drivers/FPU-emu/get_address.c

@@ -3,7 +3,7 @@
  |                                                                           |
  | Get the effective address from an FPU instruction.                        |
  |                                                                           |
- | Copyright (C) 1992,1993                                                   |
+ | Copyright (C) 1992,1993,1994                                              |
  |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
  |                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au    |
  |                                                                           |
@@ -46,9 +46,10 @@ static void *sib(int mod)
   unsigned char ss,index,base;
   long offset;
 
-  RE_ENTRANT_CHECK_OFF
+  RE_ENTRANT_CHECK_OFF;
+  FPU_code_verify_area(1);
   base = get_fs_byte((char *) FPU_EIP);   /* The SIB byte */
-  RE_ENTRANT_CHECK_ON
+  RE_ENTRANT_CHECK_ON;
   FPU_EIP++;
   ss = base >> 6;
   index = (base >> 3) & 7;
@@ -74,17 +75,19 @@ static void *sib(int mod)
   if (mod == 1)
     {
       /* 8 bit signed displacement */
-      RE_ENTRANT_CHECK_OFF
+      RE_ENTRANT_CHECK_OFF;
+      FPU_code_verify_area(1);
       offset += (signed char) get_fs_byte((char *) FPU_EIP);
-      RE_ENTRANT_CHECK_ON
+      RE_ENTRANT_CHECK_ON;
       FPU_EIP++;
     }
   else if (mod == 2 || base == 5) /* The second condition also has mod==0 */
     {
       /* 32 bit displacment */
-      RE_ENTRANT_CHECK_OFF
+      RE_ENTRANT_CHECK_OFF;
+      FPU_code_verify_area(4);
       offset += (signed) get_fs_long((unsigned long *) FPU_EIP);
-      RE_ENTRANT_CHECK_ON
+      RE_ENTRANT_CHECK_ON;
       FPU_EIP += 4;
     }
 
@@ -135,9 +138,10 @@ void get_address(unsigned char FPU_modrm)
       if (FPU_rm == 5)
 	{
 	  /* Special case: disp32 */
-	  RE_ENTRANT_CHECK_OFF
+	  RE_ENTRANT_CHECK_OFF;
+	  FPU_code_verify_area(4);
 	  offset = get_fs_long((unsigned long *) FPU_EIP);
-	  RE_ENTRANT_CHECK_ON
+	  RE_ENTRANT_CHECK_ON;
 	  FPU_EIP += 4;
 	  FPU_data_address = (void *) offset;
 	  return;
@@ -150,16 +154,18 @@ void get_address(unsigned char FPU_modrm)
 	}
     case 1:
       /* 8 bit signed displacement */
-      RE_ENTRANT_CHECK_OFF
+      RE_ENTRANT_CHECK_OFF;
+      FPU_code_verify_area(1);
       offset = (signed char) get_fs_byte((char *) FPU_EIP);
-      RE_ENTRANT_CHECK_ON
+      RE_ENTRANT_CHECK_ON;
       FPU_EIP++;
       break;
     case 2:
       /* 32 bit displacement */
-      RE_ENTRANT_CHECK_OFF
+      RE_ENTRANT_CHECK_OFF;
+      FPU_code_verify_area(4);
       offset = (signed) get_fs_long((unsigned long *) FPU_EIP);
-      RE_ENTRANT_CHECK_ON
+      RE_ENTRANT_CHECK_ON;
       FPU_EIP += 4;
       break;
     case 3:

drivers/FPU-emu/load_store.c

@@ -4,7 +4,7 @@
  | This file contains most of the code to interpret the FPU instructions     |
  | which load and store from user memory.                                    |
  |                                                                           |
- | Copyright (C) 1992,1993                                                   |
+ | Copyright (C) 1992,1993,1994                                              |
  |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
  |                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au    |
  |                                                                           |
@@ -168,6 +168,7 @@ switch ( type )
     break;
   case 024:     /* fldcw */
     RE_ENTRANT_CHECK_OFF;
+    FPU_verify_area(VERIFY_READ, FPU_data_address, 2);
     control_word = get_fs_word((unsigned short *) FPU_data_address);
     RE_ENTRANT_CHECK_ON;
     if ( partial_status & ~control_word & CW_Exceptions )
@@ -206,7 +207,7 @@ switch ( type )
     break;
   case 034:      /* fstcw m16int */
     RE_ENTRANT_CHECK_OFF;
-    verify_area(VERIFY_WRITE,FPU_data_address,2);
+    FPU_verify_area(VERIFY_WRITE,FPU_data_address,2);
     put_fs_word(control_word, (short *) FPU_data_address);
     RE_ENTRANT_CHECK_ON;
     NO_NET_DATA_EFFECT;
@@ -220,7 +221,7 @@ switch ( type )
     break;
   case 036:      /* fstsw m2byte */
     RE_ENTRANT_CHECK_OFF;
-    verify_area(VERIFY_WRITE,FPU_data_address,2);
+    FPU_verify_area(VERIFY_WRITE,FPU_data_address,2);
     put_fs_word(status_word(),(short *) FPU_data_address);
     RE_ENTRANT_CHECK_ON;
     NO_NET_DATA_EFFECT;

drivers/FPU-emu/poly_sin.c

@@ -3,7 +3,7 @@
  |                                                                           |
  |  Computation of an approximation of the sin function by a polynomial      |
  |                                                                           |
- | Copyright (C) 1992,1993                                                   |
+ | Copyright (C) 1992,1993,1994                                              |
  |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
  |                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au    |
  |                                                                           |
@@ -128,20 +128,20 @@ void	poly_sine(FPU_REG const *arg, FPU_REG *result)
 	  )
 	{
 #ifdef DEBUGGING
-	  RE_ENTRANT_CHECK_OFF
+	  RE_ENTRANT_CHECK_OFF;
 	  printk("\nEXP=%d, MS=%08x, LS=%08x\n", result->exp,
 		 result->sigh, result->sigl);
-	  RE_ENTRANT_CHECK_ON
+	  RE_ENTRANT_CHECK_ON;
 #endif DEBUGGING
 	  EXCEPTION(EX_INTERNAL|0x103);
 	}
       
 #ifdef DEBUGGING
-      RE_ENTRANT_CHECK_OFF
+      RE_ENTRANT_CHECK_OFF;
       printk("\n***CORRECTING ILLEGAL RESULT*** in poly_sin() computation\n");
       printk("EXP=%d, MS=%08x, LS=%08x\n", result->exp,
 	     result->sigh, result->sigl);
-      RE_ENTRANT_CHECK_ON
+      RE_ENTRANT_CHECK_ON;
 #endif DEBUGGING
 
       result->sigl = 0;	/* Truncate the result to 1.00 */

drivers/FPU-emu/version.h

@@ -9,5 +9,5 @@
  |                                                                           |
  +---------------------------------------------------------------------------*/
 
-#define FPU_VERSION "wm-FPU-emu version Beta 1.7"
+#define FPU_VERSION "wm-FPU-emu version Beta 1.8"
 

drivers/char/atixlmouse.c

@@ -11,7 +11,6 @@
 
 #include <linux/kernel.h>
 #include <linux/sched.h>
-#include <linux/tty.h>
 #include <linux/signal.h>
 #include <linux/errno.h>
 

drivers/char/busmouse.c

@@ -26,7 +26,6 @@
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/busmouse.h>
-#include <linux/tty.h>
 #include <linux/signal.h>
 #include <linux/errno.h>
 

drivers/char/console.c

@@ -967,7 +967,6 @@ void con_write(struct tty_struct * tty)
 	int c;
 	unsigned int currcons;
 
-	wake_up_interruptible(&tty->write_q.proc_list);
 	currcons = tty->line - 1;
 	if (currcons >= NR_CONSOLES) {
 		printk("con_write: illegal tty (%d)\n", currcons);
@@ -1279,6 +1278,8 @@ void con_write(struct tty_struct * tty)
 	if (vcmode != KD_GRAPHICS)
 		set_cursor(currcons);
 	enable_bh(KEYBOARD_BH);
+	if (LEFT(&tty->write_q) > WAKEUP_CHARS)
+		wake_up_interruptible(&tty->write_q.proc_list);
 }
 
 void do_keyboard_interrupt(void)

drivers/char/keyboard.c

@@ -126,6 +126,8 @@ static unsigned char handle_diacr(unsigned char);
 /* pt_regs - set by keyboard_interrupt(), used by show_ptregs() */
 static struct pt_regs * pt_regs;
 
+static int got_break = 0;
+
 static inline void kb_wait(void)
 {
 	int i;
@@ -343,7 +345,6 @@ static void put_queue(int ch)
 	if (LEFT(qp)) {
 		qp->buf[qp->head] = ch;
 		INC(qp->head);
-		wake_up_interruptible(&qp->proc_list);
 	}
 }
 
@@ -364,7 +365,6 @@ static void puts_queue(char *cp)
 			INC(qp->head);
 		}
 	}
-	wake_up_interruptible(&qp->proc_list);
 }
 
 static void applkey(int key, char mode)
@@ -419,13 +419,13 @@ static void hold(void)
 {
 	if (rep || !tty)
 		return;
-	if (vc_kbd_flag(kbd, VC_SCROLLOCK))
-		/* pressing srcoll lock 2nd time sends ^Q, ChN */
-		put_queue(START_CHAR(tty));
+	/* pressing scroll lock 1st time sends ^S, ChN */
+	/* pressing scroll lock 2nd time sends ^Q, ChN */
+	/* now done directly without regard to ISIG -- jlc */
+	if (!vc_kbd_flag(kbd, VC_SCROLLOCK))
+		stop_tty(tty);
 	else
-		/* pressing scroll lock 1st time sends ^S, ChN */
-		put_queue(STOP_CHAR(tty));
-	chg_vc_kbd_flag(kbd,VC_SCROLLOCK);
+		start_tty(tty);
 }
 
 static void num(void)
@@ -453,8 +453,7 @@ static void lastcons(void)
 
 static void send_intr(void)
 {
-	if (tty)
-		put_queue(INTR_CHAR(tty));
+	got_break = 1;
 }
 
 static void scrll_forw(void)
@@ -814,6 +813,26 @@ static void kbd_bh(void * unused)
 		}
 		want_console = -1;
 	}
+	if (got_break) {
+		if (tty && !I_IGNBRK(tty)) {
+			if (I_BRKINT(tty)) {
+				flush_input(tty);
+				flush_output(tty);
+				if (tty->pgrp > 0)
+					kill_pg(tty->pgrp, SIGINT, 1);
+			} else {
+				cli();
+				if (LEFT(&tty->read_q) >= 2) {
+					set_bit(tty->read_q.head,
+						&tty->readq_flags);
+					put_queue(TTY_BREAK);
+					put_queue(0);
+				}
+				sti();
+			}
+		}
+		got_break = 0;
+	}
 	do_keyboard_interrupt();
 	cli();
 	if ((inb_p(0x64) & kbd_read_mask) == 0x01)

drivers/char/msbusmouse.c

@@ -31,7 +31,6 @@
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/busmouse.h>
-#include <linux/tty.h>
 #include <linux/signal.h>
 #include <linux/errno.h>
 

drivers/char/pty.c

@@ -17,17 +17,20 @@
 #include <linux/tty.h>
 #include <linux/fcntl.h>
 #include <linux/interrupt.h>
+#include <linux/string.h>
 
 #include <asm/system.h>
 #include <asm/bitops.h>
 
+#define MIN(a,b)	((a) < (b) ? (a) : (b))
+
 static void pty_close(struct tty_struct * tty, struct file * filp)
 {
 	if (!tty)
 		return;
 	if (IS_A_PTY_MASTER(tty->line)) {
 		if (tty->count > 1)
-			return;
+			printk("master pty_close: count = %d!!\n", tty->count);
 	} else {
 		if (tty->count > 2)
 			return;
@@ -40,32 +43,39 @@ static void pty_close(struct tty_struct * tty, struct file * filp)
 	wake_up_interruptible(&tty->link->secondary.proc_list);
 	wake_up_interruptible(&tty->link->read_q.proc_list);
 	wake_up_interruptible(&tty->link->write_q.proc_list);
-	if (IS_A_PTY_MASTER(tty->line)) {
+	if (IS_A_PTY_MASTER(tty->line))
 		tty_hangup(tty->link);
-		flush_input(tty);
-		flush_output(tty);
+	else {
+		start_tty(tty);
+		set_bit(TTY_SLAVE_CLOSED, &tty->link->flags);
 	}
 }
 
 static inline void pty_copy(struct tty_struct * from, struct tty_struct * to)
 {
-	int c;
+	unsigned long count, n;
+	struct tty_queue *fq, *tq;
 
-	while (!from->stopped && !EMPTY(&from->write_q)) {
-		if (FULL(&to->read_q)) {
-			TTY_READ_FLUSH(to);
-			if (FULL(&to->read_q))
-				break;
-			continue;
-		}
-		c = get_tty_queue(&from->write_q);
-		put_tty_queue(c, &to->read_q);
-		if (current->signal & ~current->blocked)
-			break;
+	if (from->stopped || EMPTY(&from->write_q))
+		return;
+	fq = &from->write_q;
+	/* Bypass the read_q if this is a pty master. */
+	tq = IS_A_PTY_MASTER(to->line) ? &to->secondary : &to->read_q;
+	count = MIN(CHARS(fq), LEFT(tq));
+	while (count) {
+		n = MIN(MIN(TTY_BUF_SIZE - fq->tail, TTY_BUF_SIZE - tq->head),
+			count);
+		memcpy(&tq->buf[tq->head], &fq->buf[fq->tail], n);
+		count -= n;
+		fq->tail = (fq->tail + n) & (TTY_BUF_SIZE - 1);
+		tq->head = (tq->head + n) & (TTY_BUF_SIZE - 1);
 	}
-	TTY_READ_FLUSH(to);
-	if (!FULL(&from->write_q))
-		wake_up_interruptible(&from->write_q.proc_list);
+	if (IS_A_PTY_MASTER(to->line))
+		wake_up_interruptible(&tq->proc_list);
+	else
+		TTY_READ_FLUSH(to);
+	if (LEFT(fq) > WAKEUP_CHARS)
+		wake_up_interruptible(&fq->proc_list);
 	if (from->write_data_cnt) {
 		set_bit(from->line, &tty_check_write);
 		mark_bh(TTY_BH);
@@ -87,10 +97,8 @@ int pty_open(struct tty_struct *tty, struct file * filp)
 {
 	if (!tty || !tty->link)
 		return -ENODEV;
-	if (IS_A_PTY_MASTER(tty->line))
-		clear_bit(TTY_SLAVE_OPENED, &tty->flags);
-	else
-		set_bit(TTY_SLAVE_OPENED, &tty->link->flags);
+	if (IS_A_PTY_SLAVE(tty->line))
+		clear_bit(TTY_SLAVE_CLOSED, &tty->link->flags);
 	tty->write = tty->link->write = pty_write;
 	tty->close = tty->link->close = pty_close;
 	wake_up_interruptible(&tty->read_q.proc_list);

drivers/char/serial.c

@@ -58,8 +58,6 @@
 
 #undef ISR_HACK
 
-#define WAKEUP_CHARS (3*TTY_BUF_SIZE/4)
-
 /*
  * rs_event		- Bitfield of serial lines that events pending
  * 				to be processed at the next clock tick.
@@ -418,7 +416,7 @@ static inline int check_modem_status(struct async_struct *info)
 	
 	status = serial_in(info, UART_MSR);
 		
-	if ((status & UART_MSR_DDCD) && !C_LOCAL(info->tty)) {
+	if ((status & UART_MSR_DDCD) && !C_CLOCAL(info->tty)) {
 #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
 		printk("ttys%d CD now %s...", info->line,
 		       (status & UART_MSR_DCD) ? "on" : "off");
@@ -433,7 +431,7 @@ static inline int check_modem_status(struct async_struct *info)
 			rs_sched_event(info, RS_EVENT_HANGUP);
 		}
 	}
-	if (C_RTSCTS(info->tty)) {
+	if (C_CRTSCTS(info->tty)) {
 		if (info->tty->hw_stopped) {
 			if (status & UART_MSR_CTS) {
 #ifdef SERIAL_DEBUG_INTR
@@ -562,7 +560,7 @@ static inline void handle_rs_break(struct async_struct *info)
 	if (info->flags & ASYNC_SAK)
 		do_SAK(info->tty);
 		
-	if (I_BRKINT(info->tty)) {
+	if (!I_IGNBRK(info->tty) && I_BRKINT(info->tty)) {
 		flush_input(info->tty);
 		flush_output(info->tty);
 		if (info->tty->pgrp > 0)
@@ -1066,7 +1064,7 @@ static void rs_throttle(struct tty_struct * tty, int status)
 	switch (status) {
 	case TTY_THROTTLE_RQ_FULL:
 		info = rs_table + DEV_TO_SL(tty->line);
-		if (tty->termios->c_iflag & IXOFF) {
+		if (I_IXOFF(tty)) {
 			info->x_char = STOP_CHAR(tty);
 		} else {
 			mcr = serial_inp(info, UART_MCR);
@@ -1076,7 +1074,7 @@ static void rs_throttle(struct tty_struct * tty, int status)
 		break;
 	case TTY_THROTTLE_RQ_AVAIL:
 		info = rs_table + DEV_TO_SL(tty->line);
-		if (tty->termios->c_iflag & IXOFF) {
+		if (I_IXOFF(tty)) {
 			if (info->x_char)
 				info->x_char = 0;
 			else
@@ -1382,7 +1380,7 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
 			error = verify_area(VERIFY_WRITE, (void *) arg,sizeof(long));
 			if (error)
 				return error;
-			put_fs_long(C_LOCAL(tty) ? 1 : 0,
+			put_fs_long(C_CLOCAL(tty) ? 1 : 0,
 				    (unsigned long *) arg);
 			return 0;
 		case TIOCSSOFTCAR:
@@ -1591,7 +1589,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 {
 	struct wait_queue wait = { current, NULL };
 	int		retval;
-	int		do_clocal = C_LOCAL(tty);
+	int		do_clocal = C_CLOCAL(tty);
 
 	/*
 	 * If the device is in the middle of being closed, then block

drivers/net/8390.c

@@ -36,7 +36,6 @@ static char *version =
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/fs.h>
-#include <linux/tty.h>
 #include <linux/types.h>
 #include <linux/ptrace.h>
 #include <linux/string.h>

drivers/net/lance.c

@@ -563,8 +563,12 @@ lance_start_xmit(struct sk_buff *skb, struct device *dev)
 	if (skb->free)
 	    kfree_skb (skb, FREE_WRITE);
     } else
+    {
+    	/* Gimme!!! */
+    	if(skb->free==0)
+    		skb_kept_by_device(skb);
 	lp->tx_ring[entry].base = (int)(skb+1) | 0x83000000;
-
+    }
     lp->cur_tx++;
 
     /* Trigger an immediate send poll. */
@@ -648,6 +652,9 @@ lance_interrupt(int reg_ptr)
 		struct sk_buff *skb = ((struct sk_buff *)databuff) - 1;
 		if (skb->free)
 		    kfree_skb(skb, FREE_WRITE);
+		else
+		    skb_device_release(skb,FREE_WRITE);
+		/* Warning: skb may well vanish at the point you call device_release! */
 	    }
 	    dirty_tx++;
 	}

drivers/net/slip.c

@@ -31,13 +31,11 @@
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/socket.h>
-#include <linux/termios.h>
 #include <linux/sockios.h>
 #include <linux/interrupt.h>
 #include <linux/tty.h>
 #include <linux/errno.h>
 #include <linux/stat.h>
-#include <linux/tty.h>
 #include <linux/in.h>
 #include "inet.h"
 #include "dev.h"

fs/open.c

@@ -262,6 +262,8 @@ asmlinkage int sys_fchmod(unsigned int fd, mode_t mode)
 		return -EPERM;
 	if (IS_RDONLY(inode))
 		return -EROFS;
+	if (mode == (mode_t) -1)
+		mode = inode->i_mode;
 	inode->i_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
 	if (!suser() && !in_group_p(inode->i_gid))
 		inode->i_mode &= ~S_ISGID;
@@ -286,6 +288,8 @@ asmlinkage int sys_chmod(const char * filename, mode_t mode)
 		iput(inode);
 		return -EROFS;
 	}
+	if (mode == (mode_t) -1)
+		mode = inode->i_mode;
 	inode->i_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
 	if (!suser() && !in_group_p(inode->i_gid))
 		inode->i_mode &= ~S_ISGID;

include/linux/kernel.h

@@ -14,11 +14,6 @@
 #define LONG_MAX	((long)(~0UL>>1))
 #define ULONG_MAX	(~0UL)
 
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1
-
-int verify_area(int type, void * addr, unsigned long count);
-
 #define	KERN_EMERG	"<0>"	/* system is unusable			*/
 #define	KERN_ALERT	"<1>"	/* action must be taken immediately	*/
 #define	KERN_CRIT	"<2>"	/* critical conditions			*/

include/linux/mm.h

@@ -2,9 +2,26 @@
 #define _LINUX_MM_H
 
 #include <linux/page.h>
-#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
 #include <linux/kernel.h>
 
+#define VERIFY_READ 0
+#define VERIFY_WRITE 1
+
+int __verify_write(unsigned long addr, unsigned long count);
+
+extern inline int verify_area(int type, void * addr, unsigned long size)
+{
+	if (TASK_SIZE <= (unsigned long) addr)
+		return -EFAULT;
+	if (size > TASK_SIZE - (unsigned long) addr)
+		return -EFAULT;
+	if (wp_works_ok || type == VERIFY_READ || !size)
+		return 0;
+	return __verify_write((unsigned long) addr,size);
+}
+
 /*
  * Linux kernel virtual memory manager primitives.
  * The idea being to have a "virtual" mm in the same way

include/linux/sched.h

@@ -13,6 +13,21 @@
 
 #define HZ 100
 
+/*
+ * System setup flags..
+ */
+extern int hard_math;
+extern int x86;
+extern int ignore_irq13;
+extern int wp_works_ok;
+
+/*
+ * Bus types (default is ISA, but people can check others with these..)
+ * MCA_bus hardcoded to 0 for now.
+ */
+extern int EISA_bus;
+#define MCA_bus 0
+
 #include <linux/tasks.h>
 #include <asm/system.h>
 
@@ -290,21 +305,6 @@ extern unsigned long volatile jiffies;
 extern struct timeval xtime;
 extern int need_resched;
 
-/*
- * System setup flags..
- */
-extern int hard_math;
-extern int x86;
-extern int ignore_irq13;
-extern int wp_works_ok;
-
-/*
- * Bus types (default is ISA, but people can check others with these..)
- * MCA_bus hardcoded to 0 for now.
- */
-extern int EISA_bus;
-#define MCA_bus 0
-
 #define CURRENT_TIME (xtime.tv_sec)
 
 extern void sleep_on(struct wait_queue ** p);

include/linux/termios.h

@@ -51,6 +51,7 @@
 #define TIOCSLCKTRMIOS	0x5457
 
 /* Used for packet mode */
+#define TIOCPKT_DATA		 0
 #define TIOCPKT_FLUSHREAD	 1
 #define TIOCPKT_FLUSHWRITE	 2
 #define TIOCPKT_STOP		 4

include/linux/tty.h

@@ -62,7 +62,6 @@ extern struct screen_info screen_info;
 #define TTY_BUF_SIZE 1024	/* Must be a power of 2 */
 
 struct tty_queue {
-	unsigned long data;
 	unsigned long head;
 	unsigned long tail;
 	struct wait_queue * proc_list;
@@ -143,60 +142,88 @@ struct serial_struct {
 #define FULL(a) (!LEFT(a))
 #define CHARS(a) (((a)->head-(a)->tail)&(TTY_BUF_SIZE-1))
 
-extern void put_tty_queue(char c, struct tty_queue * queue);
+extern void put_tty_queue(unsigned char c, struct tty_queue * queue);
 extern int get_tty_queue(struct tty_queue * queue);
 
 #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
 #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
 #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
 #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
-#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
 #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
+#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
+#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
+#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
 #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
 #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
-#define SUSPEND_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
+#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
+#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
+#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
+#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
+#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
 #define LNEXT_CHAR(tty)	((tty)->termios->c_cc[VLNEXT])
+#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
 
-#define _L_FLAG(tty,f)	((tty)->termios->c_lflag & f)
-#define _I_FLAG(tty,f)	((tty)->termios->c_iflag & f)
-#define _O_FLAG(tty,f)	((tty)->termios->c_oflag & f)
-#define _C_FLAG(tty,f)	((tty)->termios->c_cflag & f)
-
-#define L_CANON(tty)	_L_FLAG((tty),ICANON)
-#define L_ISIG(tty)	_L_FLAG((tty),ISIG)
-#define L_ECHO(tty)	_L_FLAG((tty),ECHO)
-#define L_ECHOE(tty)	_L_FLAG((tty),ECHOE)
-#define L_ECHOK(tty)	_L_FLAG((tty),ECHOK)
-#define L_ECHONL(tty)	_L_FLAG((tty),ECHONL)
-#define L_ECHOCTL(tty)	_L_FLAG((tty),ECHOCTL)
-#define L_ECHOKE(tty)	_L_FLAG((tty),ECHOKE)
-#define L_TOSTOP(tty)	_L_FLAG((tty),TOSTOP)
+#define _I_FLAG(tty,f)	((tty)->termios->c_iflag & (f))
+#define _O_FLAG(tty,f)	((tty)->termios->c_oflag & (f))
+#define _C_FLAG(tty,f)	((tty)->termios->c_cflag & (f))
+#define _L_FLAG(tty,f)	((tty)->termios->c_lflag & (f))
 
 #define I_IGNBRK(tty)	_I_FLAG((tty),IGNBRK)
 #define I_BRKINT(tty)	_I_FLAG((tty),BRKINT)
 #define I_IGNPAR(tty)	_I_FLAG((tty),IGNPAR)
 #define I_PARMRK(tty)	_I_FLAG((tty),PARMRK)
 #define I_INPCK(tty)	_I_FLAG((tty),INPCK)
-#define I_UCLC(tty)	_I_FLAG((tty),IUCLC)
-#define I_NLCR(tty)	_I_FLAG((tty),INLCR)
-#define I_CRNL(tty)	_I_FLAG((tty),ICRNL)
-#define I_NOCR(tty)	_I_FLAG((tty),IGNCR)
+#define I_ISTRIP(tty)	_I_FLAG((tty),ISTRIP)
+#define I_INLCR(tty)	_I_FLAG((tty),INLCR)
+#define I_IGNCR(tty)	_I_FLAG((tty),IGNCR)
+#define I_ICRNL(tty)	_I_FLAG((tty),ICRNL)
+#define I_IUCLC(tty)	_I_FLAG((tty),IUCLC)
 #define I_IXON(tty)	_I_FLAG((tty),IXON)
 #define I_IXANY(tty)	_I_FLAG((tty),IXANY)
-#define I_STRP(tty)	_I_FLAG((tty),ISTRIP)
-
-#define O_POST(tty)	_O_FLAG((tty),OPOST)
-#define O_LCUC(tty)	_O_FLAG((tty),OLCUC)
-#define O_NLCR(tty)	_O_FLAG((tty),ONLCR)
-#define O_CRNL(tty)	_O_FLAG((tty),OCRNL)
-#define O_NOCR(tty)	_O_FLAG((tty),ONOCR)
-#define O_NLRET(tty)	_O_FLAG((tty),ONLRET)
+#define I_IXOFF(tty)	_I_FLAG((tty),IXOFF)
+#define I_IMAXBEL(tty)	_I_FLAG((tty),IMAXBEL)
+
+#define O_OPOST(tty)	_O_FLAG((tty),OPOST)
+#define O_OLCUC(tty)	_O_FLAG((tty),OLCUC)
+#define O_ONLCR(tty)	_O_FLAG((tty),ONLCR)
+#define O_OCRNL(tty)	_O_FLAG((tty),OCRNL)
+#define O_ONOCR(tty)	_O_FLAG((tty),ONOCR)
+#define O_ONLRET(tty)	_O_FLAG((tty),ONLRET)
+#define O_OFILL(tty)	_O_FLAG((tty),OFILL)
+#define O_OFDEL(tty)	_O_FLAG((tty),OFDEL)
+#define O_NLDLY(tty)	_O_FLAG((tty),NLDLY)
+#define O_CRDLY(tty)	_O_FLAG((tty),CRDLY)
 #define O_TABDLY(tty)	_O_FLAG((tty),TABDLY)
+#define O_BSDLY(tty)	_O_FLAG((tty),BSDLY)
+#define O_VTDLY(tty)	_O_FLAG((tty),VTDLY)
+#define O_FFDLY(tty)	_O_FLAG((tty),FFDLY)
+
+#define C_BAUD(tty)	_C_FLAG((tty),CBAUD)
+#define C_CSIZE(tty)	_C_FLAG((tty),CSIZE)
+#define C_CSTOPB(tty)	_C_FLAG((tty),CSTOPB)
+#define C_CREAD(tty)	_C_FLAG((tty),CREAD)
+#define C_PARENB(tty)	_C_FLAG((tty),PARENB)
+#define C_PARODD(tty)	_C_FLAG((tty),PARODD)
+#define C_HUPCL(tty)	_C_FLAG((tty),HUPCL)
+#define C_CLOCAL(tty)	_C_FLAG((tty),CLOCAL)
+#define C_CIBAUD(tty)	_C_FLAG((tty),CIBAUD)
+#define C_CRTSCTS(tty)	_C_FLAG((tty),CRTSCTS)
 
-#define C_LOCAL(tty)	_C_FLAG((tty),CLOCAL)
-#define C_RTSCTS(tty)	_C_FLAG((tty),CRTSCTS)
-#define C_SPEED(tty)	((tty)->termios->c_cflag & CBAUD)
-#define C_HUP(tty)	(C_SPEED((tty)) == B0)
+#define L_ISIG(tty)	_L_FLAG((tty),ISIG)
+#define L_ICANON(tty)	_L_FLAG((tty),ICANON)
+#define L_XCASE(tty)	_L_FLAG((tty),XCASE)
+#define L_ECHO(tty)	_L_FLAG((tty),ECHO)
+#define L_ECHOE(tty)	_L_FLAG((tty),ECHOE)
+#define L_ECHOK(tty)	_L_FLAG((tty),ECHOK)
+#define L_ECHONL(tty)	_L_FLAG((tty),ECHONL)
+#define L_NOFLSH(tty)	_L_FLAG((tty),NOFLSH)
+#define L_TOSTOP(tty)	_L_FLAG((tty),TOSTOP)
+#define L_ECHOCTL(tty)	_L_FLAG((tty),ECHOCTL)
+#define L_ECHOPRT(tty)	_L_FLAG((tty),ECHOPRT)
+#define L_ECHOKE(tty)	_L_FLAG((tty),ECHOKE)
+#define L_FLUSHO(tty)	_L_FLAG((tty),FLUSHO)
+#define L_PENDIN(tty)	_L_FLAG((tty),PENDIN)
+#define L_IEXTEN(tty)	_L_FLAG((tty),IEXTEN)
 
 /*
  * Where all of the state associated with a tty is kept while the tty
@@ -218,12 +245,13 @@ struct tty_struct {
 	int session;
 	unsigned char stopped:1, hw_stopped:1, packet:1, lnext:1;
 	unsigned char char_error:3;
+	unsigned char erasing:1;
 	unsigned char ctrl_status;
 	short line;
 	int disc;
 	int flags;
 	int count;
-	int column;
+	unsigned int column;
 	struct winsize winsize;
 	int  (*open)(struct tty_struct * tty, struct file * filp);
 	void (*close)(struct tty_struct * tty, struct file * filp);
@@ -241,10 +269,13 @@ struct tty_struct {
 	void (*write_data_callback)(void * data);
 	void * write_data_arg;
 	int readq_flags[TTY_BUF_SIZE/32];
+	int secondary_flags[TTY_BUF_SIZE/32];
+	int canon_data;
+	unsigned long canon_head;
+	unsigned int canon_column;
 	struct tty_queue read_q;
 	struct tty_queue write_q;
 	struct tty_queue secondary;
-	struct wait_queue * except_q;
 	void *disc_data;
 };
 
@@ -256,9 +287,9 @@ struct tty_ldisc {
 	int	(*open)(struct tty_struct *);
 	void	(*close)(struct tty_struct *);
 	int	(*read)(struct tty_struct * tty, struct file * file,
-			char * buf, int nr);
+			unsigned char * buf, unsigned int nr);
 	int	(*write)(struct tty_struct * tty, struct file * file,
-			 char * buf, int nr);	
+			 unsigned char * buf, unsigned int nr);	
 	int	(*ioctl)(struct tty_struct * tty, struct file * file,
 			 unsigned int cmd, unsigned long arg);
 	int	(*select)(struct tty_struct * tty, struct inode * inode,
@@ -313,12 +344,11 @@ struct tty_ldisc {
  */
 #define TTY_WRITE_BUSY 0
 #define TTY_READ_BUSY 1
-#define TTY_CR_PENDING 2
-#define TTY_SQ_THROTTLED 3
-#define TTY_RQ_THROTTLED 4
-#define TTY_IO_ERROR 5
-#define TTY_SLAVE_OPENED 6
-#define TTY_EXCLUSIVE 7
+#define TTY_SQ_THROTTLED 2
+#define TTY_RQ_THROTTLED 3
+#define TTY_IO_ERROR 4
+#define TTY_SLAVE_CLOSED 5
+#define TTY_EXCLUSIVE 6
 
 /*
  * When a break, frame error, or parity error happens, these codes are
@@ -336,6 +366,10 @@ struct tty_ldisc {
 extern void tty_write_flush(struct tty_struct *);
 extern void tty_read_flush(struct tty_struct *);
 
+/* Number of chars that must be available in a write queue before
+   the queue is awakened. */
+#define WAKEUP_CHARS (3*TTY_BUF_SIZE/4)
+
 extern struct tty_struct *tty_table[];
 extern struct termios *tty_termios[];
 extern struct termios *termios_locked[];
@@ -366,7 +400,9 @@ extern long tty_init(long);
 extern void flush_input(struct tty_struct * tty);
 extern void flush_output(struct tty_struct * tty);
 extern void wait_until_sent(struct tty_struct * tty);
-extern void copy_to_cooked(struct tty_struct * tty);
+extern int check_change(struct tty_struct * tty, int channel);
+extern void stop_tty(struct tty_struct * tty);
+extern void start_tty(struct tty_struct * tty);
 extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
 extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
 			     int buflen);

kernel/fork.c

@@ -56,7 +56,8 @@ static int find_empty_process(void)
 		}
 		if (task[i]->uid == current->uid)
 			this_user_tasks++;
-		if (task[i]->pid == last_pid || task[i]->pgrp == last_pid)
+		if (task[i]->pid == last_pid || task[i]->pgrp == last_pid ||
+		    task[i]->session == last_pid)
 			goto repeat;
 	}
 	if (tasks_free <= MIN_TASKS_LEFT_FOR_ROOT ||

kernel/ksyms.S

@@ -9,7 +9,7 @@
 
 _register_chrdev
 _unregister_chrdev
-_verify_area
+___verify_write
 _wake_up_interruptible
 
 _current

kernel/sys.c

@@ -7,7 +7,6 @@
 #include <linux/config.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
-#include <linux/tty.h>
 #include <linux/kernel.h>
 #include <linux/times.h>
 #include <linux/utsname.h>
@@ -510,7 +509,7 @@ asmlinkage int sys_getpgrp(void)
 
 asmlinkage int sys_setsid(void)
 {
-	if (current->leader && !suser())
+	if (current->leader)
 		return -EPERM;
 	current->leader = 1;
 	current->session = current->pgrp = current->pid;

mm/memory.c

@@ -651,17 +651,8 @@ void do_wp_page(unsigned long error_code, unsigned long address,
 	*pg_table = 0;
 }
 
-int verify_area(int type, void * addr, unsigned long size)
+int __verify_write(unsigned long start, unsigned long size)
 {
-	unsigned long start;
-
-	start = (unsigned long) addr;
-	if (start >= TASK_SIZE)
-		return -EFAULT;
-	if (size > TASK_SIZE - start)
-		return -EFAULT;
-	if (wp_works_ok || type == VERIFY_READ || !size)
-		return 0;
 	size--;
 	size += start & ~PAGE_MASK;
 	size >>= PAGE_SHIFT;

net/inet/ip.c

@@ -1464,7 +1464,8 @@ ip_retransmit(struct sock *sk, int all)
 
 	/* If the interface is (still) up and running, kick it. */
 	if (dev->flags & IFF_UP) {
-		if (sk) dev->queue_xmit(skb, dev, sk->priority);
+		if (sk && !skb_device_locked(skb))
+			dev->queue_xmit(skb, dev, sk->priority);
 	/*	  else dev->queue_xmit(skb, dev, SOPRI_NORMAL ); CANNOT HAVE SK=NULL HERE */
 	}
 

net/inet/skbuff.c

@@ -381,6 +381,12 @@ void kfree_skb(struct sk_buff *skb, int rw)
 		return;
 	}
 	IS_SKB(skb);
+	if(skb->lock)
+	{
+		skb->free=1;	/* Free when unlocked */
+		return;
+	}
+	
 	if(skb->free == 2)
 		printk("Warning: kfree_skb passed an skb that nobody set the free flag on!\n");
 	if(skb->list)
@@ -424,6 +430,7 @@ void kfree_skb(struct sk_buff *skb, int rw)
 		return NULL;
 	skb->free= 2;	/* Invalid so we pick up forgetful users */
 	skb->list= 0;	/* Not on a list */
+	skb->lock= 0;
 	skb->truesize=size;
 	skb->mem_len=size;
 	skb->mem_addr=skb;
@@ -452,3 +459,31 @@ void kfree_skbmem(void *mem,unsigned size)
 	}
 }
 
+/*
+ *	Skbuff device locking
+ */
+ 
+void skb_kept_by_device(struct sk_buff *skb)
+{
+	skb->lock++;
+}
+
+void skb_device_release(struct sk_buff *skb, int mode)
+{
+	unsigned long flags;
+	save_flags(flags);
+	skb->lock--;
+	if(skb->lock==0)
+	{
+		if(skb->free==1)
+			kfree_skb(skb,mode);
+	}
+	restore_flags(flags);
+}
+
+int skb_device_locked(struct sk_buff *skb)
+{
+	if(skb->lock)
+		return 1;
+	return 0;
+}

net/inet/skbuff.h

@@ -99,7 +99,9 @@ extern struct sk_buff *		skb_peek(struct sk_buff * volatile *list);
 extern struct sk_buff *		skb_peek_copy(struct sk_buff * volatile *list);
 extern struct sk_buff *		alloc_skb(unsigned int size, int priority);
 extern void			kfree_skbmem(void *mem, unsigned size);
-
+extern void			skb_kept_by_device(struct sk_buff *skb);
+extern void			skb_device_release(struct sk_buff *skb, int mode);
+extern int			skb_device_locked(struct sk_buff *skb);
 extern void 			skb_check(struct sk_buff *skb,int, char *);
 #define IS_SKB(skb)	skb_check((skb),__LINE__,__FILE__)
 

net/inet/tcp.c

@@ -583,64 +583,41 @@ tcp_check(struct tcphdr *th, int len,
 }
 
 
-void
-tcp_send_check(struct tcphdr *th, unsigned long saddr, 
-	       unsigned long daddr, int len, struct sock *sk)
-{
-  th->check = 0;
-  th->check = tcp_check(th, len, saddr, daddr);
-  return;
-}
-
-static struct sk_buff * dequeue_partial(struct sock * sk)
+void tcp_send_check(struct tcphdr *th, unsigned long saddr, 
+		unsigned long daddr, int len, struct sock *sk)
 {
-	struct sk_buff * skb;
-	unsigned long flags;
-
-	save_flags(flags);
-	cli();
-	skb = sk->send_tmp;
-	if (skb) {
-		sk->send_tmp = skb->next;
-		skb->next = NULL;
-	}
-	restore_flags(flags);
-	return skb;
+	th->check = 0;
+	th->check = tcp_check(th, len, saddr, daddr);
+	return;
 }
 
-static void enqueue_partial(struct sk_buff * skb, struct sock * sk)
+static void tcp_send_skb(struct sock *sk, struct sk_buff *skb)
 {
-	unsigned long flags;
+	int size;
 
-	save_flags(flags);
-	cli();
-	skb->next = sk->send_tmp;
-	sk->send_tmp = skb;
-	restore_flags(flags);
-}
+	/* length of packet (not counting length of pre-tcp headers) */
+	size = skb->len - ((unsigned char *) skb->h.th - skb->data);
 
-static void tcp_send_partial(struct sock *sk)
-{
-  struct sk_buff *skb;
+	/* sanity check it.. */
+	if (size < sizeof(struct tcphdr) || size > skb->len) {
+		printk("tcp_send_skb: bad skb (skb = %p, data = %p, th = %p, len = %lu)\n",
+			skb, skb->data, skb->h.th, skb->len);
+		kfree_skb(skb, FREE_WRITE);
+		return;
+	}
 
-  if (sk == NULL)
-  	return;
-  while ((skb = dequeue_partial(sk)) != NULL) {
-  
 	/* If we have queued a header size packet.. */
-	if(skb->len-(unsigned long)skb->h.th + (unsigned long)skb->data == sizeof(struct tcphdr)) {
+	if (size == sizeof(struct tcphdr)) {
 		/* If its got a syn or fin its notionally included in the size..*/
 		if(!skb->h.th->syn && !skb->h.th->fin) {
-			printk("tcp_send_partial: attempt to queue a bogon.\n");
+			printk("tcp_send_skb: attempt to queue a bogon.\n");
 			kfree_skb(skb,FREE_WRITE);
 			return;
 		}
 	}
   
 	/* We need to complete and send the packet. */
-	tcp_send_check(skb->h.th, sk->saddr, sk->daddr,
-			skb->len-(unsigned long)skb->h.th +
-			(unsigned long)skb->data, sk);
+	tcp_send_check(skb->h.th, sk->saddr, sk->daddr, size, sk);
 
 	skb->h.seq = sk->send_seq;
 	if (after(sk->send_seq , sk->window_seq) ||
@@ -664,9 +641,49 @@ static void tcp_send_partial(struct sock *sk)
 		  reset_timer(sk, TIME_PROBE0, 
 			      backoff(sk->backoff) * (2 * sk->mdev + sk->rtt));
 	} else {
-		sk->prot->queue_xmit(sk, skb->dev, skb,0);
+		sk->prot->queue_xmit(sk, skb->dev, skb, 0);
 	}
-  }
+}
+
+static struct sk_buff * dequeue_partial(struct sock * sk)
+{
+	struct sk_buff * skb;
+	unsigned long flags;
+
+	save_flags(flags);
+	cli();
+	skb = sk->send_tmp;
+	if (skb) {
+		sk->send_tmp = skb->next;
+		skb->next = NULL;
+	}
+	restore_flags(flags);
+	return skb;
+}
+
+static void enqueue_partial(struct sk_buff * skb, struct sock * sk)
+{
+	struct sk_buff * tmp;
+	unsigned long flags;
+
+	skb->next = NULL;
+	save_flags(flags);
+	cli();
+	tmp = sk->send_tmp;
+	sk->send_tmp = skb;
+	restore_flags(flags);
+	if (tmp)
+		tcp_send_skb(sk, tmp);
+}
+
+static void tcp_send_partial(struct sock *sk)
+{
+	struct sk_buff *skb;
+
+	if (sk == NULL)
+		return;
+	while ((skb = dequeue_partial(sk)) != NULL)
+		tcp_send_skb(sk, skb);
 }
 
 
@@ -901,6 +918,7 @@ tcp_write(struct sock *sk, unsigned char *from,
 		continue;
 	}
 
+#if 0
 	/*
 	 * We also need to worry about the window.
 	 * If window < 1/4 offered window, don't use it.  That's
@@ -915,6 +933,10 @@ tcp_write(struct sock *sk, unsigned char *from,
 	  copy = sk->mtu;
 	copy = min(copy, sk->mtu);
 	copy = min(copy, len);
+#else
+	/* This also prevents silly windows by simply ignoring the offered window.. */
+	copy = min(sk->mtu, len);
+#endif
 
   /* We should really check the window here also. */
 	if (sk->packets_out && copy < sk->mtu && !(flags & MSG_OOB)) {
@@ -1011,34 +1033,7 @@ tcp_write(struct sock *sk, unsigned char *from,
 		enqueue_partial(send_tmp, sk);
 		continue;
 	}
-
-	tcp_send_check((struct tcphdr *)buff, sk->saddr, sk->daddr,
-		        copy + sizeof(struct tcphdr), sk);
-
-	skb->h.seq = sk->send_seq;
-	if (after(sk->send_seq , sk->window_seq) ||
-	          (sk->retransmits && sk->timeout == TIME_WRITE) ||
-		  sk->packets_out >= sk->cong_window) {
-		DPRINTF((DBG_TCP, "sk->cong_window = %d, sk->packets_out = %d\n",
-					sk->cong_window, sk->packets_out));
-		DPRINTF((DBG_TCP, "sk->send_seq = %d, sk->window_seq = %d\n",
-					sk->send_seq, sk->window_seq));
-		skb->next = NULL;
-		skb->magic = TCP_WRITE_QUEUE_MAGIC;
-		if (sk->wback == NULL) {
-			sk->wfront = skb;
-		} else {
-			sk->wback->next = skb;
-		}
-		sk->wback = skb;
-		if (before(sk->window_seq, sk->wfront->h.seq) &&
-		   sk->send_head == NULL &&
-		   sk->ack_backlog == 0)
-		        reset_timer(sk, TIME_PROBE0, 
-			    backoff(sk->backoff) * (2 * sk->mdev + sk->rtt));
-	} else {
-		prot->queue_xmit(sk, dev, skb,0);
-	}
+	tcp_send_skb(sk, skb);
   }
   sk->err = 0;
 
@@ -3604,7 +3599,7 @@ tcp_send_probe0(struct sock *sk)
   len = hlen + sizeof(struct tcphdr) + (data ? 1 : 0);
  	
   /* Allocate buffer. */
-  if ((skb2 = alloc_skb(sizeof(struct sk_buff) + len,GFP_KERNEL)) == NULL) {
+  if ((skb2 = alloc_skb(sizeof(struct sk_buff) + len, GFP_ATOMIC)) == NULL) {
 /*    printk("alloc failed raw %x th %x hlen %d data %d len %d\n",
 	   raw, skb->h.th, hlen, data, len); */
     reset_timer (sk, TIME_PROBE0, 10);  /* try again real soon */

net/socket.c

@@ -28,7 +28,6 @@
 #include <linux/stat.h>
 #include <linux/socket.h>
 #include <linux/fcntl.h>
-#include <linux/termios.h>
 #include <linux/net.h>
 #include <linux/ddi.h>