Import 1.3.62

Makefile

 VERSION = 1
 PATCHLEVEL = 3
-SUBLEVEL = 61
+SUBLEVEL = 62
 
 ARCH = i386
 

arch/alpha/defconfig

@@ -45,8 +45,10 @@ CONFIG_ST506=y
 CONFIG_BLK_DEV_IDE=y
 # CONFIG_BLK_DEV_IDECD is not set
 # CONFIG_BLK_DEV_IDETAPE is not set
+# CONFIG_BLK_DEV_RZ1000 is not set
 # CONFIG_BLK_DEV_CMD640 is not set
 # CONFIG_BLK_DEV_TRITON is not set
+# CONFIG_IDE_CHIPSETS is not set
 # CONFIG_BLK_DEV_XD is not set
 
 #
@@ -164,6 +166,7 @@ CONFIG_MSDOS_FS=y
 # CONFIG_UMSDOS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_NFS_FS=y
+# CONFIG_ROOT_NFS is not set
 # CONFIG_SMB_FS is not set
 CONFIG_ISO9660_FS=y
 # CONFIG_HPFS_FS is not set

arch/alpha/kernel/entry.S

@@ -128,26 +128,12 @@ entInt:
 /* set up the arguments to the C interrupt handler */
 	lda	$27,do_entInt
 	jsr	$26,($27),do_entInt
-/* ok, check if we need to do software interrupts */
-1:	lda	$0,intr_count
+/* ok, return */
+	lda	$0,intr_count
 	ldq	$1,0($0)
 	subq	$1,1,$1
-	bne	$1,2f		/* interrupt within interrupt: return now */
-	lda	$2,bh_active
-	ldq	$3,0($2)
-	lda	$2,bh_mask
-	ldq	$2,0($2)
-	and	$2,$3,$2
-	bne	$2,3f
 	stq	$1,0($0)
 	br	$31,ret_from_sys_call
-.align 3
-2:	stq	$1,0($0)
-	br	$31,restore_all
-.align 3
-3:	lda	$27,do_bottom_half
-	jsr	$26,($27),do_bottom_half
-	br	$31,1b
 .end entInt
 
 .align 3
@@ -204,7 +190,7 @@ kernel_clone:
 	lda $27,sys_clone
 	jsr $26,($27),sys_clone
 	stq $0,0($30)	
-	br ret_from_sys_call
+	br $31,ret_from_sys_call
 .end	kernel_clone
 
 /*
@@ -502,10 +488,23 @@ entSys:
 	blt	$0,syscall_error	/* the call failed */
 	stq	$0,0($30)
 	stq	$31,72($30)		/* a3=0 => no error */
+
 .align 3
 ret_from_sys_call:
-	ldq	$0,SP_OFF($30)
 	cmovne	$26,0,$19		/* $19 = 0 => non-restartable */
+	/* check bottom half interrupts */
+	lda	$0,intr_count
+	ldq	$1,0($0)
+	bne	$1,ret_from_handle_bh
+	lda	$2,bh_active
+	ldq	$3,0($2)
+	lda	$2,bh_mask
+	ldq	$4,0($2)
+	addq	$1,1,$1
+	and	$3,$4,$2
+	bne	$2,handle_bottom_half	
+ret_from_handle_bh:
+	ldq	$0,SP_OFF($30)
 	and	$0,8,$0
 	beq	$0,restore_all
 ret_from_reschedule:
@@ -525,6 +524,25 @@ restore_all:
 	RESTORE_ALL
 	rti
 
+	.align 3
+handle_bottom_half:
+	/*
+	 * We're called with $0 containing the address of
+	 * 'intr_count' and $1 containing 'intr_count+1'
+	 */
+	stq	$1,0($0)	/* intr_count = 1 */
+	subq	$30,16,$30
+	stq	$19,0($30)	/* save syscall nr */
+	stq	$20,8($30)	/* and error indication (a3) */
+	lda	$27,do_bottom_half
+	jsr	$26,($27),do_bottom_half
+	lda	$0,intr_count
+	ldq	$19,0($30)
+	ldq	$20,8($30)
+	addq	$30,16,$30
+	stq	$31,0($0)	/* intr_count = 0 */
+	br	$31,ret_from_handle_bh
+
 	.align 3
 syscall_error:
 	/*

drivers/block/ide-cd.c

@@ -79,13 +79,18 @@
  *                       Try to eliminate byteorder assumptions.
  *                       Use atapi_cdrom_subchnl struct definition.
  *                       Add STANDARD_ATAPI compilation option.
+ * 3.07  Jan 29, 1996 -- More twiddling for broken drives: Sony 55D,
+ *                        Vertos 300.
+ *                       Add NO_DOOR_LOCKING configuration option.
+ *                       Handle drive_cmd requests w/NULL args (for hdparm -t).
+ *                       Work around sporadic Sony55e audio play problem.
  *
  * NOTE: Direct audio reads will only work on some types of drive.
  * So far, i've received reports of success for Sony and Toshiba drives.
  *
  * ATAPI cd-rom driver.  To be used with ide.c.
  *
- * Copyright (C) 1994, 1995  scott snyder  <snyder@fnald0.fnal.gov>
+ * Copyright (C) 1994, 1995, 1996  scott snyder  <snyder@fnald0.fnal.gov>
  * May be copied or modified under the terms of the GNU General Public License
  * (../../COPYING).
  */
@@ -130,6 +135,14 @@
 #endif
 
 
+/* Turning this on will disable the door-locking functionality.
+   This is apparently needed for supermount. */
+
+#ifndef NO_DOOR_LOCKING
+#define NO_DOOR_LOCKING 0
+#endif
+
+
 /************************************************************************/
 
 #define SECTOR_SIZE 512
@@ -1420,6 +1433,43 @@ int cdrom_queue_packet_command (ide_drive_t *drive, struct packet_command *pc)
 }
 
 
+
+/****************************************************************************
+ * drive_cmd handling.
+ *
+ * Most of the functions accessed via drive_cmd are not valid for ATAPI
+ * devices.  Only attempt to execute those which actually should be valid.
+ */
+
+static
+void cdrom_do_drive_cmd (ide_drive_t *drive)
+{
+  struct request *rq = HWGROUP(drive)->rq;
+  byte *args = rq->buffer;
+
+  if (args)
+    {
+#if 0  /* This bit isn't done yet... */
+      if (args[0] == WIN_SETFEATURES &&
+	  (args[2] == 0x66 || args[2] == 0xcc || args[2] == 0x02 ||
+	   args[2] == 0xdd || args[2] == 0x5d))
+	{
+	  OUT_BYTE (args[2], io_base + IDE_FEATURE_OFFSET);
+	  <send cmd>
+	}
+      else
+#endif
+	{
+	  printk ("%s: Unsupported drive command %02x %02x %02x\n",
+		  drive->name, args[0], args[1], args[2]);
+	  rq->errors = 1;
+	}
+    }
+
+  cdrom_end_request (1, drive);
+}
+
+
 
 /****************************************************************************
  * cdrom driver request routine.
@@ -1439,6 +1489,9 @@ void ide_do_rw_cdrom (ide_drive_t *drive, unsigned long block)
       return;
     }
 
+  else if (rq -> cmd == IDE_DRIVE_CMD)
+    cdrom_do_drive_cmd (drive);
+
   else if (rq -> cmd != READ)
     {
       printk ("ide-cd: bad cmd %d\n", rq -> cmd);
@@ -1890,11 +1943,9 @@ cdrom_play_lba_range_msf (ide_drive_t *drive, int lba_start, int lba_end,
 #endif  /* not STANDARD_ATAPI */
 
 
-/* Play audio starting at LBA LBA_START and finishing with the
-   LBA before LBA_END. */
 static int
-cdrom_play_lba_range (ide_drive_t *drive, int lba_start, int lba_end,
-		      struct atapi_request_sense *reqbuf)
+cdrom_play_lba_range_1 (ide_drive_t *drive, int lba_start, int lba_end,
+			struct atapi_request_sense *reqbuf)
 {
   /* This is rather annoying.
      My NEC-260 won't recognize group 5 commands such as PLAYAUDIO12;
@@ -1942,6 +1993,38 @@ cdrom_play_lba_range (ide_drive_t *drive, int lba_start, int lba_end,
 }
 
 
+/* Play audio starting at LBA LBA_START and finishing with the
+   LBA before LBA_END. */
+static int
+cdrom_play_lba_range (ide_drive_t *drive, int lba_start, int lba_end,
+		      struct atapi_request_sense *reqbuf)
+{
+  int i, stat;
+  struct atapi_request_sense my_reqbuf;
+
+  if (reqbuf == NULL)
+    reqbuf = &my_reqbuf;
+
+  /* Some drives, will, for certain audio cds,
+     give an error if you ask them to play the entire cd using the
+     values which are returned in the TOC.  The play will succeed, however,
+     if the ending address is adjusted downwards by a few frames. */
+  for (i=0; i<75; i++)
+    {
+      stat = cdrom_play_lba_range_1 (drive, lba_start, lba_end, reqbuf);
+
+      if (stat == 0 ||
+          !(reqbuf->sense_key == ILLEGAL_REQUEST && reqbuf->asc == 0x24))
+	return stat;
+
+      --lba_end;
+      if (lba_end <= lba_start) break;
+    }
+
+  return stat;
+}
+
+
 static
 int cdrom_get_toc_entry (ide_drive_t *drive, int track,
                          struct atapi_toc_entry **ent,
@@ -2575,7 +2658,12 @@ void ide_cdrom_setup (ide_drive_t *drive)
   /* Turn this off by default, since many people don't like it. */
   CDROM_STATE_FLAGS (drive)->eject_on_close= 0;
 
+#if NO_DOOR_LOCKING
+  CDROM_CONFIG_FLAGS (drive)->no_doorlock = 1;
+#else
   CDROM_CONFIG_FLAGS (drive)->no_doorlock = 0;
+#endif
+
   CDROM_CONFIG_FLAGS (drive)->drq_interrupt =
     ((drive->id->config & 0x0060) == 0x20);
 
@@ -2608,17 +2696,30 @@ void ide_cdrom_setup (ide_drive_t *drive)
       CDROM_CONFIG_FLAGS (drive)->no_playaudio12 = 1;
     }
 
-  else if (strcmp (drive->id->model, "V003S0DS") == 0 ||  /* Vertos */
-	   strcmp (drive->id->model, "0V300SSD") == 0)
+  /* Vertos 300.
+     There seem to be at least two different, incompatible versions
+     of this drive floating around.  Luckily, they appear to return their
+     id strings with different byte orderings. */
+  else if (strcmp (drive->id->model, "V003S0DS") == 0)
     {
       CDROM_CONFIG_FLAGS (drive)->vertos_lossage = 1;
       CDROM_CONFIG_FLAGS (drive)->playmsf_uses_bcd = 1;
       CDROM_CONFIG_FLAGS (drive)->no_lba_toc = 1;
     }
+  else if (strcmp (drive->id->model, "0V300SSD") == 0 ||
+	   strcmp (drive->id->model, "V003M0DP") == 0)
+    CDROM_CONFIG_FLAGS (drive)->no_lba_toc = 1;
 
+  /* Vertos 400. */
   else if (strcmp (drive->id->model, "V004E0DT") == 0 ||
 	   strcmp (drive->id->model, "0V400ETD") == 0)
     CDROM_CONFIG_FLAGS (drive)->no_lba_toc = 1;
+
+  else if ( strcmp (drive->id->model, "CD-ROM CDU55D") == 0) /*sony cdu55d */
+    CDROM_CONFIG_FLAGS (drive)->no_playaudio12 = 1;
+
+ else if (strcmp (drive->id->model, "CD-ROM CDU55E") == 0)
+	CDROM_CONFIG_FLAGS (drive)->no_playaudio12 = 1;
 #endif  /* not STANDARD_ATAPI */
 
   drive->cdrom_info.toc               = NULL;

drivers/char/ChangeLog

+Fri Feb  9 14:15:47 1996    <tytso@rsts-11.mit.edu>
+
+	* serial.c (block_til_ready): Fixed another race condition which
+		happens if a hangup happens during the open.
+
 Wed Jan 10 10:08:00 1996    <tytso@rsts-11.mit.edu>
 
 	* serial.c (block_til_ready): Remove race condition which happened

drivers/char/apm_bios.c

@@ -705,7 +705,10 @@ static void do_apm_timer(unsigned long unused)
 		if (err)
 			apm_error("busy", err);
 	}
-	check_events();
+
+	if (!(((standbys_pending > 0) || (suspends_pending > 0))
+	      && (apm_bios_info.version == 0x100)))
+		check_events();
 
 	init_timer(&apm_timer);
 	apm_timer.expires = APM_CHECK_TIMEOUT + jiffies;

drivers/char/console.c

@@ -72,6 +72,12 @@
 #define CTRL_ACTION 0x0d00ff81
 #define CTRL_ALWAYS 0x0800f501	/* Cannot be overridden by disp_ctrl */
 
+/*
+ * Here is the default bell parameters: 750HZ, 1/8th of a second
+ */
+#define DEFAULT_BELL_PITCH	750
+#define DEFAULT_BELL_DURATION	(HZ/8)
+
 /*
  *  NOTE!!! We sometimes disable and enable interrupts for a short while
  * (to put a word in video IO), but this will work even for keyboard
@@ -1136,17 +1142,16 @@ static void setterm_command(int currcons)
 			break;
 		case 10: /* set bell frequency in Hz */
 			if (npar >= 1)
-				bell_pitch = (par[1] < 20 || par[1] > 32767) ?
-					0 : 1193180 / par[1];
+				bell_pitch = par[1];
 			else
-				bell_pitch = 0x637;
+				bell_pitch = DEFAULT_BELL_PITCH;
 			break;
 		case 11: /* set bell duration in msec */
 			if (npar >= 1)
 				bell_duration = (par[1] < 2000) ?
 					par[1]*HZ/1000 : 0;
 			else
-				bell_duration = HZ/8;
+				bell_duration = DEFAULT_BELL_DURATION;
 			break;
 		case 12: /* bring specified console to the front */
 			if (par[1] >= 1 && vc_cons_allocated(par[1]-1))
@@ -1318,8 +1323,8 @@ static void reset_terminal(int currcons, int do_clear)
 	tab_stop[3]	=
 	tab_stop[4]	= 0x01010101;
 
-	bell_pitch = 0x637;
-	bell_duration = HZ/8;
+	bell_pitch = DEFAULT_BELL_PITCH;
+	bell_duration = DEFAULT_BELL_DURATION;
 
 	gotoxy(currcons,0,0);
 	save_cur(currcons);
@@ -1475,7 +1480,7 @@ static int con_write(struct tty_struct * tty, int from_user,
 		 */
 		switch (c) {
 			case 7:
-				if (bell_pitch && bell_duration)
+				if (bell_duration)
 					kd_mksound(bell_pitch, bell_duration);
 				continue;
 			case 8:

drivers/char/serial.c

@@ -2218,7 +2218,8 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 	 */
 	if (tty_hung_up_p(filp) ||
 	    (info->flags & ASYNC_CLOSING)) {
-		interruptible_sleep_on(&info->close_wait);
+		if (info->flags & ASYNC_CLOSING)
+			interruptible_sleep_on(&info->close_wait);
 #ifdef SERIAL_DO_RESTART
 		if (info->flags & ASYNC_HUP_NOTIFY)
 			return -EAGAIN;

drivers/char/vt.c

@@ -155,10 +155,16 @@ kd_nosound(unsigned long ignored)
 }
 
 void
-kd_mksound(unsigned int count, unsigned int ticks)
+_kd_mksound(unsigned int hz, unsigned int ticks)
 {
-	static struct timer_list sound_timer = { NULL, NULL, 0, 0, kd_nosound };
+	static struct timer_list sound_timer = { NULL, NULL, 0, 0,
+						 kd_nosound };
 
+	unsigned int count = 0;
+
+	if (hz > 20 && hz < 32767)
+		count = 1193180 / hz;
+	
 	cli();
 	del_timer(&sound_timer);
 	if (count) {
@@ -180,6 +186,8 @@ kd_mksound(unsigned int count, unsigned int ticks)
 	return;
 }
 
+void (*kd_mksound)(unsigned int hz, unsigned int ticks) = _kd_mksound;
+	
 /*
  * We handle the console-specific ioctl's here.  We allow the
  * capability to modify any console, not just the fg_console. 
@@ -211,22 +219,22 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
 	case KIOCSOUND:
 		if (!perm)
 			return -EPERM;
-		kd_mksound((unsigned int)arg, 0);
+		kd_mksound(1193180 / (unsigned int) arg, 0);
 		return 0;
 
 	case KDMKTONE:
 		if (!perm)
 			return -EPERM;
 	{
-		unsigned int ticks = HZ * ((arg >> 16) & 0xffff) / 1000;
-
+		unsigned int ticks, count;
+		
 		/*
 		 * Generate the tone for the appropriate number of ticks.
 		 * If the time is zero, turn off sound ourselves.
 		 */
-		kd_mksound(arg & 0xffff, ticks);
-		if (ticks == 0)
-			kd_nosound(0);
+		ticks = HZ * ((arg >> 16) & 0xffff) / 1000;
+		count = ticks ? (1193180 / (arg & 0xffff)) : 0;
+		kd_mksound(count, ticks);
 		return 0;
 	}
 

drivers/char/vt_kern.h

@@ -30,7 +30,7 @@ extern struct vt_struct {
 	struct wait_queue *paste_wait;
 } *vt_cons[MAX_NR_CONSOLES];
 
-void kd_mksound(unsigned int count, unsigned int ticks);
+void (*kd_mksound)(unsigned int hz, unsigned int ticks);
 int vc_allocate(unsigned int console);
 int vc_cons_allocated(unsigned int console);
 int vc_resize(unsigned long lines, unsigned long cols);

drivers/net/3c59x.c

@@ -413,6 +413,16 @@ static int vortex_found_device(struct device *dev, int ioaddr, int irq,
 	vp  = (struct vortex_private *)dev->priv;
 	vp->product_name = product_names[product_index];
 	vp->options = options;
+	if (options >= 0) {
+		vp->media_override = options & 7;
+		vp->full_duplex = (options & 8) ? 1 : 0;
+		vp->bus_master = (options & 16) ? 1 : 0;
+	} else {
+		vp->media_override = 7;
+		vp->full_duplex = 0;
+		vp->bus_master = 0;
+	}
+
 	vortex_probe1(dev);
 #endif /* MODULE */
 	return 0;

drivers/net/ibmtr.c

@@ -1242,7 +1242,7 @@ DPRINTK("tada: sending packet...\n");
 
 	if (dev->tbusy) {
 		int ticks_waited=jiffies - dev->trans_start;
-		if(ticks_waited<5)
+		if(ticks_waited<TX_TIMEOUT)
 			return 1;
 		DPRINTK("Arrg. Transmitter busy for more than 50 msec. Donald resets adapter, but resetting\n \
 the IBM tokenring adapter takes a long time. It might not even help when the\n \

drivers/net/ibmtr.h

@@ -8,6 +8,16 @@
 #define NOTOK 0
 #define TOKDEBUG 1
 
+/* Mike Eckhoff -- 96/02/08 */
+/* This defines the minimum timeout. If a transmission takes */
+/* longer then TX_TIMEOUT to send, we will wait and retry. */
+/* On large networks, this value may need to be increased. */
+/* We will start at .2s because that is what most drivers seem to be doing */
+/* now and the original value of .05s was not nearly enough for large nets. */
+
+#define TX_TIMEOUT (HZ/5)
+
+
 #ifndef IBMTR_SHARED_RAM_BASE
 #define IBMTR_SHARED_RAM_BASE 0xD0
 #define IBMTR_SHARED_RAM_SIZE 0x10

drivers/scsi/st.c

@@ -11,7 +11,7 @@
   Copyright 1992, 1993, 1994, 1995 Kai Makisara
 		 email Kai.Makisara@metla.fi
 
-  Last modified: Thu Dec 14 21:51:16 1995 by root@kai.makisara.fi
+  Last modified: Mon Jan 29 21:18:12 1996 by root@kai.makisara.fi
   Some small formal changes - aeb, 950809
 */
 
@@ -438,6 +438,11 @@ flush_buffer(struct inode * inode, struct file * filp, int seek_next)
     if (!result && backspace > 0)
       result = st_int_ioctl(inode, filp, MTBSR, backspace);
   }
+  else if ((STp->eof == ST_FM) && !STp->eof_hit) {
+    (STp->mt_status)->mt_fileno++;
+    STp->drv_block = 0;
+  }
+
   return result;
 
 }
@@ -1849,6 +1854,10 @@ st_ioctl(struct inode * inode,struct file * file,
      if (i)
        return i;
 
+     i = flush_buffer(inode, file, FALSE);
+     if (i < 0)
+       return i;
+
      (STp->mt_status)->mt_dsreg =
        ((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) |
        ((STp->density << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK);

fs/fat/dir.c

@@ -17,6 +17,7 @@
 #include <linux/stat.h>
 #include <linux/string.h>
 #include <linux/ioctl.h>
+#include <linux/dirent.h>
 
 #include <asm/segment.h>
 
@@ -44,30 +45,12 @@ struct file_operations fat_dir_operations = {
 	file_fsync		/* fsync */
 };
 
-
-int fat_dir_ioctl(struct inode * inode, struct file * filp,
-		  unsigned int cmd, unsigned long arg)
-{
-	switch (cmd) {
-#if 0
-	/*
-	 * We want to provide an interface for Samba to be able
-	 * to get the short filename for a given long filename.
-	 * We should be able to accomplish by modifying fat_readdir
-	 * slightly.
-	 */
-	case VFAT_LONGNAME_TO_SHORT:
-#endif
-	default:
-		return -EINVAL;
-	}
-}
-
-int fat_readdir(
+int fat_readdirx(
 	struct inode *inode,
 	struct file *filp,
 	void *dirent,
-	filldir_t filldir)
+	filldir_t filldir,
+	int both)
 {
 	struct super_block *sb = inode->i_sb;
 	int ino,i,i2,last;
@@ -76,7 +59,7 @@ int fat_readdir(
 	struct msdos_dir_entry *de;
 	unsigned long oldpos = filp->f_pos;
 	int is_long;
-	char longname[256];
+	char longname[275];
 	unsigned char long_len = 0; /* Make compiler warning go away */
 	unsigned char alias_checksum = 0; /* Make compiler warning go away */
 
@@ -209,7 +192,7 @@ int fat_readdir(
 			}
 			PRINTK(("Long filename: %s, get_new_entry: %d\n", longname, get_new_entry));
 		} else if (!IS_FREE(de->name) && !(de->attr & ATTR_VOLUME)) {
-			char bufname[13];
+			char bufname[14];
 			char *ptname = bufname;
 			int dotoffset = 0;
 
@@ -258,11 +241,20 @@ int fat_readdir(
 					ino = fat_parent_ino(inode,0);
 
 				if (!is_long) {
+					dcache_add(inode, bufname, i+dotoffset, ino);
+					if (both) {
+						bufname[i+dotoffset] = '\0';
+					}
 					if (filldir(dirent, bufname, i+dotoffset, oldpos, ino) < 0) {
 						filp->f_pos = oldpos;
 						break;
 					}
 				} else {
+					dcache_add(inode, longname, long_len, ino);
+					if (both) {
+						memcpy(&longname[long_len+1], bufname, i+dotoffset);
+						long_len += i+dotoffset;
+					}
 					if (filldir(dirent, longname, long_len, oldpos, ino) < 0) {
 						filp->f_pos = oldpos;
 						break;
@@ -280,3 +272,80 @@ int fat_readdir(
 	if (bh) brelse(bh);
 	return 0;
 }
+
+int fat_readdir(
+	struct inode *inode,
+	struct file *filp,
+	void *dirent,
+	filldir_t filldir)
+{
+    return fat_readdirx(inode, filp, dirent, filldir, 0);
+}
+static int vfat_ioctl_fill(
+	void * buf,
+	const char * name,
+	int name_len,
+	off_t offset,
+	ino_t ino)
+{
+	struct dirent *d1 = (struct dirent *)buf;
+	struct dirent *d2 = d1 + 1;
+	int len, slen;
+	int dotdir;
+
+	if (get_user(&d1->d_reclen) != 0) {
+		return -1;
+	}
+
+	if ((name_len == 1 && name[0] == '.') ||
+	    (name_len == 2 && name[0] == '.' && name[1] == '.')) {
+		dotdir = 1;
+		len = name_len;
+	} else {
+		dotdir = 0;
+		len = strlen(name);
+	}
+	if (len != name_len) {
+		memcpy_tofs(d2->d_name, name, len);
+		put_user(0, d2->d_name + len);
+		put_user(len, &d2->d_reclen);
+		put_user(ino, &d2->d_ino);
+		put_user(offset, &d2->d_off);
+		slen = name_len - len;
+		memcpy_tofs(d1->d_name, name+len+1, slen);
+		put_user(0, d1->d_name+slen);
+		put_user(slen, &d1->d_reclen);
+	} else {
+		put_user(0, d2->d_name);
+		put_user(0, &d2->d_reclen);
+		memcpy_tofs(d1->d_name, name, len);
+		put_user(0, d1->d_name+len);
+		put_user(len, &d1->d_reclen);
+	}
+	PRINTK(("FAT d1=%p d2=%p len=%d, name_len=%d\n",
+		d1, d2, len, name_len));
+
+	return 0;
+}
+
+int fat_dir_ioctl(struct inode * inode, struct file * filp,
+		  unsigned int cmd, unsigned long arg)
+{
+	/*
+	 * We want to provide an interface for Samba to be able
+	 * to get the short filename for a given long filename.
+	 * Samba should use this ioctl instead of readdir() to
+	 * get the information it needs.
+	 */
+	switch (cmd) {
+	case VFAT_IOCTL_READDIR_BOTH: {
+		struct dirent *d1 = (struct dirent *)arg;
+		put_user(0, &d1->d_reclen);
+		return fat_readdirx(inode,filp,(void *)arg,vfat_ioctl_fill,1);
+	}
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}

fs/fat/inode.c

@@ -434,7 +434,7 @@ void fat_read_inode(struct inode *inode, struct inode_operations *fs_dir_inode_o
 		inode->i_size = CF_LE_L(raw_entry->size);
 	}
 	if(raw_entry->attr & ATTR_SYS)
-		if (MSDOS_I(inode)->sys_immutable)
+		if (MSDOS_SB(inode->i_sb)->sys_immutable)
 			inode->i_flags |= S_IMMUTABLE;
 	MSDOS_I(inode)->i_binary = is_binary(MSDOS_SB(inode->i_sb)->conversion,
 	    raw_entry->ext);

fs/proc/array.c

@@ -123,9 +123,6 @@ struct inode_operations proc_kcore_inode_operations = {
 };
 
 
-extern unsigned long prof_len;
-extern unsigned long * prof_buffer;
-extern unsigned long prof_shift;
 /*
  * This function accesses profiling information. The returned data is
  * binary: the sampling step and the actual contents of the profile
@@ -137,21 +134,21 @@ static int read_profile(struct inode *inode, struct file *file, char *buf, int c
 	unsigned long p = file->f_pos;
 	int read;
 	char * pnt;
-	unsigned long sample_step = 1 << prof_shift;
+	unsigned int sample_step = 1 << prof_shift;
 
 	if (count < 0)
 		return -EINVAL;
-	if (p >= (prof_len+1)*sizeof(unsigned long))
+	if (p >= (prof_len+1)*sizeof(unsigned int))
 		return 0;
-	if (count > (prof_len+1)*sizeof(unsigned long) - p)
-		count = (prof_len+1)*sizeof(unsigned long) - p;
+	if (count > (prof_len+1)*sizeof(unsigned int) - p)
+		count = (prof_len+1)*sizeof(unsigned int) - p;
 	read = 0;
 
-	while (p < sizeof(unsigned long) && count > 0) {
+	while (p < sizeof(unsigned int) && count > 0) {
 		put_user(*((char *)(&sample_step)+p),buf);
 		buf++; p++; count--; read++;
 	}
-	pnt = (char *)prof_buffer + p - sizeof(unsigned long);
+	pnt = (char *)prof_buffer + p - sizeof(unsigned int);
 	memcpy_tofs(buf,(void *)pnt,count);
 	read += count;
 	file->f_pos += read;

include/linux/msdos_fs.h

@@ -37,6 +37,12 @@
 #define ATTR_EXT     (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
 	/* bits that are used by the Windows 95/Windows NT extended FAT */
 
+#define ATTR_DIR_READ_BOTH 512 /* read both short and long names from the
+				* vfat filesystem.  This is used by Samba
+				* to export the vfat filesystem with correct
+				* shortnames. */
+#define ATTR_DIR_READ_SHORT 1024
+
 #define CASE_LOWER_BASE 8	/* base is lower case */
 #define CASE_LOWER_EXT  16	/* extension is lower case */
 
@@ -63,6 +69,17 @@
 
 #define MSDOS_FAT12 4078 /* maximum number of clusters in a 12 bit FAT */
 
+/*
+ * Inode flags
+ */
+#define FAT_BINARY_FL		0x00000001 /* File contains binary data */
+
+/*
+ * ioctl commands
+ */
+#define	VFAT_IOCTL_READDIR_BOTH		_IOR('r', 1, long)
+#define	VFAT_IOCTL_READDIR_SHORT	_IOW('r', 2, long)
+
 /*
  * Conversion from and to little-endian byte order. (no-op on i386/i486)
  *
@@ -128,14 +145,6 @@ struct slot_info {
 	int ino;		       /* ino for the file */
 };
 
-struct fat_cache {
-	kdev_t device; /* device number. 0 means unused. */
-	int ino; /* inode number. */
-	int file_cluster; /* cluster number in the file. */
-	int disk_cluster; /* cluster number on disk. */
-	struct fat_cache *next; /* next cache entry */
-};
-
 /* Determine whether this FS has kB-aligned data. */
 #define MSDOS_CAN_BMAP(mib) (!(((mib)->cluster_size & 1) || \
     ((mib)->data_start & 1)))
@@ -149,6 +158,14 @@ struct fat_cache {
 
 #ifdef __KERNEL__
 
+struct fat_cache {
+	kdev_t device; /* device number. 0 means unused. */
+	int ino; /* inode number. */
+	int file_cluster; /* cluster number in the file. */
+	int disk_cluster; /* cluster number on disk. */
+	struct fat_cache *next; /* next cache entry */
+};
+
 /* misc.c */
 extern int is_binary(char conversion,char *extension);
 extern void lock_fat(struct super_block *sb);

include/linux/msdos_fs_i.h

@@ -34,7 +34,6 @@ struct msdos_inode_info {
 	struct inode *i_old;	/* pointer to the old inode this inode
 				   depends on */
 	int i_binary;	/* file contains non-text data */
-	int sys_immutable;	/* file is an immutable system file */
 };
 
 #endif

include/linux/random.h

@@ -25,18 +25,20 @@ struct rand_pool_info {
 
 #ifdef __KERNEL__
 
-void rand_initialize(void);
-void rand_initialize_irq(int irq);
-void rand_initialize_blkdev(int irq, int mode);
+extern void rand_initialize(void);
+extern void rand_initialize_irq(int irq);
+extern void rand_initialize_blkdev(int irq, int mode);
 
-void add_keyboard_randomness(unsigned char scancode);
-void add_mouse_randomness(__u32 mouse_data);
-void add_interrupt_randomness(int irq);
-void add_blkdev_randomness(int major);
+extern void add_keyboard_randomness(unsigned char scancode);
+extern void add_mouse_randomness(__u32 mouse_data);
+extern void add_interrupt_randomness(int irq);
+extern void add_blkdev_randomness(int major);
 
-void get_random_bytes(void *buf, int nbytes);
+extern void get_random_bytes(void *buf, int nbytes);
 
-struct file_operations random_fops, urandom_fops;
+#ifndef MODULE
+extern struct file_operations random_fops, urandom_fops;
+#endif
 
 #endif /* __KERNEL___ */
 

include/linux/sched.h

@@ -314,7 +314,7 @@ extern struct timeval xtime;
 extern int need_resched;
 extern void do_timer(struct pt_regs *);
 
-extern unsigned long * prof_buffer;
+extern unsigned int * prof_buffer;
 extern unsigned long prof_len;
 extern unsigned long prof_shift;
 

include/linux/tcp.h

@@ -17,6 +17,9 @@
 #ifndef _LINUX_TCP_H
 #define _LINUX_TCP_H
 
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
 struct tcphdr {
 	__u16	source;
 	__u16	dest;

include/linux/time.h

@@ -2,8 +2,8 @@
 #define _LINUX_TIME_H
 
 struct timespec {
-        long    tv_sec;         /* seconds */
-        long    tv_nsec;        /* nanoseconds */
+	long	ts_sec;		/* seconds */
+	long	ts_nsec;	/* nanoseconds */
 };
 
 struct timeval {

include/net/icmp.h

@@ -19,6 +19,10 @@
 #define	_ICMP_H
 
 #include <linux/icmp.h>
+#include <linux/skbuff.h>
+
+#include <net/sock.h>
+#include <net/protocol.h>
 
 extern struct icmp_err icmp_err_convert[];
 extern struct icmp_mib icmp_statistics;

include/net/protocol.h

@@ -23,7 +23,6 @@
 #ifndef _PROTOCOL_H
 #define _PROTOCOL_H
 
-
 #define MAX_INET_PROTOS	32		/* Must be a power of 2		*/
 
 

include/net/tcp.h

@@ -19,6 +19,7 @@
 #define _TCP_H
 
 #include <linux/tcp.h>
+#include <net/checksum.h>
 
 #define MAX_SYN_SIZE	44 + MAX_HEADER + 15
 #define MAX_FIN_SIZE	40 + MAX_HEADER + 15
@@ -104,24 +105,16 @@ extern __inline int between(__u32 seq1, __u32 seq2, __u32 seq3)
 	return (after(seq1+1, seq2) && before(seq1, seq3+1));
 }
 
-
-/*
- * List all states of a TCP socket that can be viewed as a "connected"
- * state.  This now includes TCP_SYN_RECV, although I am not yet fully
- * convinced that this is the solution for the 'getpeername(2)'
- * problem. Thanks to Stephen A. Wood <saw@cebaf.gov>  -FvK
- */
-
-extern __inline const int tcp_connected(const int state)
+static __inline__ int min(unsigned int a, unsigned int b)
 {
-  return(state == TCP_ESTABLISHED || state == TCP_CLOSE_WAIT ||
-	 state == TCP_FIN_WAIT1   || state == TCP_FIN_WAIT2 ||
-	 state == TCP_SYN_RECV);
+	if (a < b) 
+		return(a);
+	return(b);
 }
 
-
 extern struct proto tcp_prot;
-
+extern struct tcp_mib tcp_statistics;
+extern struct wait_queue *master_select_wakeup;
 
 extern void	tcp_err(int type, int code, unsigned char *header, __u32 daddr,
 			__u32, struct inet_protocol *protocol);
@@ -131,13 +124,195 @@ extern int	tcp_rcv(struct sk_buff *skb, struct device *dev,
 			unsigned short len, __u32 saddr, int redo,
 			struct inet_protocol *protocol);
 
-extern int	tcp_ioctl(struct sock *sk, int cmd, unsigned long arg);
+extern int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg);
 
+extern void tcp_read_wakeup(struct sock *);
+extern void tcp_write_xmit(struct sock *);
+extern void tcp_time_wait(struct sock *);
+extern void tcp_retransmit(struct sock *, int);
+extern void tcp_do_retransmit(struct sock *, int);
 extern void tcp_send_check(struct tcphdr *th, unsigned long saddr, 
 		unsigned long daddr, int len, struct sock *sk);
-extern void tcp_send_probe0(struct sock *sk);
+
+/* tcp_output.c */
+
+extern void tcp_send_probe0(struct sock *);
+extern void tcp_send_partial(struct sock *);
+extern void tcp_write_wakeup(struct sock *);
+extern void tcp_send_fin(struct sock *sk);
+extern void tcp_send_synack(struct sock *, struct sock *, struct sk_buff *);
+extern void tcp_send_skb(struct sock *, struct sk_buff *);
+extern void tcp_send_ack(u32, u32, struct sock *sk, struct tcphdr *th, u32);
+extern void tcp_send_reset(unsigned long saddr, unsigned long daddr, struct tcphdr *th,
+	  struct proto *prot, struct options *opt, struct device *dev, int tos, int ttl);
+
 extern void tcp_enqueue_partial(struct sk_buff *, struct sock *);
 extern struct sk_buff * tcp_dequeue_partial(struct sock *);
+
+/* tcp_input.c */
 extern void tcp_cache_zap(void);
 
+/* tcp_timer.c */
+#define     tcp_reset_msl_timer(x,y,z)	reset_timer(x,y,z)
+extern void tcp_reset_xmit_timer(struct sock *, int, unsigned long);
+extern void tcp_retransmit_timer(unsigned long);
+
+/*
+ *	Default sequence number picking algorithm.
+ *	As close as possible to RFC 793, which
+ *	suggests using a 250kHz clock.
+ *	Further reading shows this assumes 2MB/s networks.
+ *	For 10MB/s ethernet, a 1MHz clock is appropriate.
+ *	That's funny, Linux has one built in!  Use it!
+ */
+
+static inline u32 tcp_init_seq(void)
+{
+	struct timeval tv;
+	do_gettimeofday(&tv);
+	return tv.tv_usec+tv.tv_sec*1000000;
+}
+
+/*
+ *      This function returns the amount that we can raise the
+ *      usable window based on the following constraints
+ *  
+ *	1. The window can never be shrunk once it is offered (RFC 793)
+ *	2. We limit memory per socket
+ */
+
+static __inline__ unsigned short tcp_raise_window(struct sock *sk)
+{
+	long free_space = sock_rspace(sk);
+	long window;
+
+	if (free_space > 1024)
+		free_space &= ~0x3FF; /* make free space a multiple of 1024 */
+
+	if(sk->window_clamp)
+		free_space = min(sk->window_clamp, free_space);
+ 
+	/* 
+         * compute the actual window i.e. 
+         * old_window - received_bytes_on_that_win 
+	 */
+
+	window = sk->window - (sk->acked_seq - sk->lastwin_seq);
+
+	if (sk->mss == 0)
+		sk->mss = sk->mtu;
+ 
+	if ( window < 0 ) {	
+		window = 0;
+		printk(KERN_DEBUG "TRW: win < 0 w=%d 1=%u 2=%u\n", 
+		       sk->window, sk->acked_seq, sk->lastwin_seq);
+	}
+	
+	if ( (free_space - window) >= min(sk->mss, MAX_WINDOW/2) )
+		return ((free_space - window) / sk->mss) * sk->mss;
+
+	return 0;
+}
+
+static __inline__ unsigned short tcp_select_window(struct sock *sk)
+{
+	long free_space = sock_rspace(sk);
+	long window;
+
+	if (free_space > 1024)
+		free_space &= ~0x3FF;	/* make free space a multiple of 1024 */
+
+	if (sk->window_clamp)
+		free_space = min(sk->window_clamp, free_space);
+	
+	/*
+	 * compute the actual window i.e.
+	 * old_window - received_bytes_on_that_win
+	 */
+
+	if (sk->mss == 0)
+		sk->mss = sk->mtu;
+
+	window = sk->window - (sk->acked_seq - sk->lastwin_seq);
+
+	if ( window < 0 ) {
+		window = 0;
+		printk(KERN_DEBUG "TSW: win < 0 w=%d 1=%u 2=%u\n",
+			sk->window, sk->acked_seq, sk->lastwin_seq);
+	}
+
+	/*
+	 * RFC 1122:
+	 * "the suggested [SWS] avoidance algoritm for the receiver is to keep
+	 *  RECV.NEXT + RCV.WIN fixed until:
+	 *  RCV.BUFF - RCV.USER - RCV.WINDOW >= min(1/2 RCV.BUFF, MSS)"
+	 *
+	 * i.e. don't raise the right edge of the window until you can't raise
+	 * it MSS bytes
+	 */
+
+	if ( (free_space - window) >= min(sk->mss, MAX_WINDOW/2) )
+		window += ((free_space - window) / sk->mss) * sk->mss;
+
+	sk->window = window;
+	sk->lastwin_seq = sk->acked_seq;
+
+	return sk->window;
+}
+
+/*
+ * List all states of a TCP socket that can be viewed as a "connected"
+ * state.  This now includes TCP_SYN_RECV, although I am not yet fully
+ * convinced that this is the solution for the 'getpeername(2)'
+ * problem. Thanks to Stephen A. Wood <saw@cebaf.gov>  -FvK
+ */
+
+extern __inline const int tcp_connected(const int state)
+{
+  return(state == TCP_ESTABLISHED || state == TCP_CLOSE_WAIT ||
+	 state == TCP_FIN_WAIT1   || state == TCP_FIN_WAIT2 ||
+	 state == TCP_SYN_RECV);
+}
+
+/*
+ * Calculate(/check) TCP checksum
+ */
+static __inline__ u16 tcp_check(struct tcphdr *th, int len,
+	unsigned long saddr, unsigned long daddr, unsigned long base)
+{
+	return csum_tcpudp_magic(saddr,daddr,len,IPPROTO_TCP,base);
+}
+
+#undef STATE_TRACE
+
+#ifdef STATE_TRACE
+static char *statename[]={
+	"Unused","Established","Syn Sent","Syn Recv",
+	"Fin Wait 1","Fin Wait 2","Time Wait", "Close",
+	"Close Wait","Last ACK","Listen","Closing"
+};
+#endif
+
+static __inline__ void tcp_set_state(struct sock *sk, int state)
+{
+	if(sk->state==TCP_ESTABLISHED)
+		tcp_statistics.TcpCurrEstab--;
+#ifdef STATE_TRACE
+	if(sk->debug)
+		printk("TCP sk=%p, State %s -> %s\n",sk, statename[sk->state],statename[state]);
+#endif	
+	/* This is a hack but it doesn't occur often and it's going to
+	   be a real        to fix nicely */
+	   
+	if(state==TCP_ESTABLISHED && sk->state==TCP_SYN_RECV)
+	{
+		wake_up_interruptible(&master_select_wakeup);
+	}
+	sk->state=state;
+	if(state==TCP_ESTABLISHED)
+		tcp_statistics.TcpCurrEstab++;
+	if(sk->state==TCP_CLOSE)
+		tcp_cache_zap();
+}
+
 #endif	/* _TCP_H */

init/main.c

@@ -456,7 +456,7 @@ static void parse_options(char *line)
 		if (!strncmp(line, "nfsaddrs=", 9)) {
 			line += 9;
 			strncpy(nfs_root_addrs, line, sizeof(nfs_root_addrs));
-			nfs_root_addrs[sizeof(nfs_root_addrs)] = '\0';
+			nfs_root_addrs[sizeof(nfs_root_addrs)-1] = '\0';
 			continue;
 		}
 #endif
@@ -620,11 +620,11 @@ asmlinkage void start_kernel(void)
 #endif
 #endif
 	if (prof_shift) {
-		prof_buffer = (unsigned long *) memory_start;
+		prof_buffer = (unsigned int *) memory_start;
 		/* only text is profiled */
 		prof_len = (unsigned long) &_etext - (unsigned long) &_stext;
 		prof_len >>= prof_shift;
-		memory_start += prof_len * sizeof(unsigned long);
+		memory_start += prof_len * sizeof(unsigned int);
 	}
 	memory_start = console_init(memory_start,memory_end);
 #ifdef CONFIG_PCI

kernel/sched.c

@@ -72,7 +72,7 @@ int need_resched = 0;
 unsigned long event = 0;
 
 extern int _setitimer(int, struct itimerval *, struct itimerval *);
-unsigned long * prof_buffer = NULL;
+unsigned int * prof_buffer = NULL;
 unsigned long prof_len = 0;
 unsigned long prof_shift = 0;
 
@@ -1115,8 +1115,8 @@ asmlinkage int sys_sched_rr_get_interval(pid_t pid, struct timespec *interval)
 	if (error)
 		return error;
 	
-	t.tv_sec = 0;
-	t.tv_nsec = 0;   /* <-- Linus, please fill correct value in here */
+	t.ts_sec = 0;
+	t.ts_nsec = 0;   /* <-- Linus, please fill correct value in here */
 	return -ENOSYS;  /* and then delete this line. Thanks!           */
 	memcpy_tofs(interval, &t, sizeof(struct timespec));
 

net/core/sock.c

@@ -169,19 +169,19 @@ int sock_setsockopt(struct sock *sk, int level, int optname,
 			sk->broadcast=valbool;
 			return 0;
 		case SO_SNDBUF:
-			if(val>32767)
-				val=32767;
-			if(val<256)
-				val=256;
-			sk->sndbuf=val;
+			if(val > SK_WMEM_MAX*2)
+				val = SK_WMEM_MAX*2;
+			if(val < 256)
+				val = 256;
+			sk->sndbuf = val;
 			return 0;
 
 		case SO_RCVBUF:
-			if(val>32767)
-				val=32767;
-			if(val<256)
-				val=256;
-			sk->rcvbuf=val;
+			if(val > SK_RMEM_MAX*2)
+			 	val = SK_RMEM_MAX*2;
+			if(val < 256)
+				val = 256;
+			sk->rcvbuf = val;
 			return(0);
 
 		case SO_KEEPALIVE:

net/ipv4/Makefile

@@ -8,10 +8,11 @@
 # Note 2! The CFLAGS definition is now in the main makefile...
 
 O_TARGET := ipv4.o
-IPV4_OBJS	:= utils.o route.o proc.o timer.o protocol.o packet.o \
-		   arp.o ip_input.o ip_fragment.o ip_forward.o ip_options.o \
-		   ip_output.o ip_sockglue.o raw.o icmp.o tcp.o udp.o \
-		   devinet.o af_inet.o igmp.o ip_fw.o
+IPV4_OBJS := utils.o route.o proc.o timer.o protocol.o packet.o \
+	     ip_input.o ip_fragment.o ip_forward.o ip_options.o \
+	     ip_output.o ip_sockglue.o \
+	     tcp.o tcp_input.o tcp_output.o tcp_timer.o \
+	     raw.o udp.o arp.o icmp.o devinet.o af_inet.o igmp.o ip_fw.o
 
 MOD_LIST_NAME := IPV4_MODULES
 M_OBJS :=

net/ipv4/af_inet.c

@@ -290,13 +290,6 @@ void destroy_sock(struct sock *sk)
 
   	sk->inuse = 1;			/* just to be safe. */
 
-  	/* 
-  	 *	In case it's sleeping somewhere. 
-  	 */
-  	 
-  	if (!sk->dead) 
-  		sk->write_space(sk);
-
   	remove_sock(sk);
   
   	/*
@@ -326,6 +319,13 @@ void destroy_sock(struct sock *sk)
 		kfree_skb(skb, FREE_WRITE);
   	}
   	
+  	/* 
+  	 *	In case it's sleeping somewhere. 
+  	 */
+  	 
+  	if (!sk->dead) 
+  		sk->write_space(sk);
+
   	/*
   	 *	Don't discard received data until the user side kills its
   	 *	half of the socket.
@@ -383,6 +383,7 @@ void destroy_sock(struct sock *sk)
   	while((skb=skb_dequeue(&sk->back_log))!=NULL) 
   	{
 		/* this should [almost] never happen. */
+		skb->sk = NULL;
 		kfree_skb(skb, FREE_READ);
 	}
 
@@ -562,7 +563,7 @@ static void def_callback2(struct sock *sk,int len)
 
 static void def_callback3(struct sock *sk)
 {
-	if(!sk->dead)
+	if(!sk->dead && sk->wmem_alloc*2 <= sk->sndbuf)
 	{
 		wake_up_interruptible(sk->sleep);
 		sock_wake_async(sk->socket, 2);

net/ipv4/tcp_timer.c

+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		Implementation of the Transmission Control Protocol(TCP).
+ *
+ * Version:	@(#)tcp.c	1.0.16	05/25/93
+ *
+ * Authors:	Ross Biro, <bir7@leland.Stanford.Edu>
+ *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *		Mark Evans, <evansmp@uhura.aston.ac.uk>
+ *		Corey Minyard <wf-rch!minyard@relay.EU.net>
+ *		Florian La Roche, <flla@stud.uni-sb.de>
+ *		Charles Hedrick, <hedrick@klinzhai.rutgers.edu>
+ *		Linus Torvalds, <torvalds@cs.helsinki.fi>
+ *		Alan Cox, <gw4pts@gw4pts.ampr.org>
+ *		Matthew Dillon, <dillon@apollo.west.oic.com>
+ *		Arnt Gulbrandsen, <agulbra@nvg.unit.no>
+ *		Jorge Cwik, <jorge@laser.satlink.net>
+ */
+
+#include <net/tcp.h>
+
+/*
+ *	Reset the retransmission timer
+ */
+ 
+void tcp_reset_xmit_timer(struct sock *sk, int why, unsigned long when)
+{
+	del_timer(&sk->retransmit_timer);
+	sk->ip_xmit_timeout = why;
+	if((long)when < 0)
+	{
+		when=3;
+		printk("Error: Negative timer in xmit_timer\n");
+	}
+	sk->retransmit_timer.expires=jiffies+when;
+	add_timer(&sk->retransmit_timer);
+}
+
+/*
+ * 	This is the normal code called for timeouts.  It does the retransmission
+ * 	and then does backoff.  tcp_do_retransmit is separated out because
+ * 	tcp_ack needs to send stuff from the retransmit queue without
+ * 	initiating a backoff.
+ */
+
+
+static void tcp_retransmit_time(struct sock *sk, int all)
+{
+	tcp_do_retransmit(sk, all);
+
+	/*
+	 * Increase the timeout each time we retransmit.  Note that
+	 * we do not increase the rtt estimate.  rto is initialized
+	 * from rtt, but increases here.  Jacobson (SIGCOMM 88) suggests
+	 * that doubling rto each time is the least we can get away with.
+	 * In KA9Q, Karn uses this for the first few times, and then
+	 * goes to quadratic.  netBSD doubles, but only goes up to *64,
+	 * and clamps at 1 to 64 sec afterwards.  Note that 120 sec is
+	 * defined in the protocol as the maximum possible RTT.  I guess
+	 * we'll have to use something other than TCP to talk to the
+	 * University of Mars.
+	 *
+	 * PAWS allows us longer timeouts and large windows, so once
+	 * implemented ftp to mars will work nicely. We will have to fix
+	 * the 120 second clamps though!
+	 */
+
+	sk->retransmits++;
+	sk->prot->retransmits++;
+	sk->backoff++;
+	sk->rto = min(sk->rto << 1, 120*HZ);
+	tcp_reset_xmit_timer(sk, TIME_WRITE, sk->rto);
+}
+
+/*
+ *	A timer event has trigger a tcp retransmit timeout. The
+ *	socket xmit queue is ready and set up to send. Because
+ *	the ack receive code keeps the queue straight we do
+ *	nothing clever here.
+ */
+
+void tcp_retransmit(struct sock *sk, int all)
+{
+	if (all) 
+	{
+		tcp_retransmit_time(sk, all);
+		return;
+	}
+
+	sk->ssthresh = sk->cong_window >> 1; /* remember window where we lost */
+	/* sk->ssthresh in theory can be zero.  I guess that's OK */
+	sk->cong_count = 0;
+
+	sk->cong_window = 1;
+
+	/* Do the actual retransmit. */
+	tcp_retransmit_time(sk, all);
+}
+
+/*
+ *	A write timeout has occurred. Process the after effects.
+ */
+
+static int tcp_write_timeout(struct sock *sk)
+{
+	/*
+	 *	Look for a 'soft' timeout.
+	 */
+	if ((sk->state == TCP_ESTABLISHED && sk->retransmits && !(sk->retransmits & 7))
+		|| (sk->state != TCP_ESTABLISHED && sk->retransmits > TCP_RETR1)) 
+	{
+		/*
+		 *	Attempt to recover if arp has changed (unlikely!) or
+		 *	a route has shifted (not supported prior to 1.3).
+		 */
+		ip_rt_advice(&sk->ip_route_cache, 0);
+	}
+	
+	/*
+	 *	Have we tried to SYN too many times (repent repent 8))
+	 */
+	 
+	if(sk->retransmits > TCP_SYN_RETRIES && sk->state==TCP_SYN_SENT)
+	{
+		if(sk->err_soft)
+			sk->err=sk->err_soft;
+		else
+			sk->err=ETIMEDOUT;
+		sk->error_report(sk);
+		del_timer(&sk->retransmit_timer);
+		tcp_statistics.TcpAttemptFails++;	/* Is this right ??? - FIXME - */
+		tcp_set_state(sk,TCP_CLOSE);
+		/* Don't FIN, we got nothing back */
+		release_sock(sk);
+		return 0;
+	}
+	/*
+	 *	Has it gone just too far ?
+	 */
+	if (sk->retransmits > TCP_RETR2) 
+	{
+		if(sk->err_soft)
+			sk->err = sk->err_soft;
+		else
+			sk->err = ETIMEDOUT;
+		sk->error_report(sk);
+		del_timer(&sk->retransmit_timer);
+		/*
+		 *	Time wait the socket 
+		 */
+		if (sk->state == TCP_FIN_WAIT1 || sk->state == TCP_FIN_WAIT2 || sk->state == TCP_CLOSING ) 
+		{
+			tcp_set_state(sk,TCP_TIME_WAIT);
+			tcp_reset_msl_timer (sk, TIME_CLOSE, TCP_TIMEWAIT_LEN);
+		}
+		else
+		{
+			/*
+			 *	Clean up time.
+			 */
+			tcp_set_state(sk, TCP_CLOSE);
+			release_sock(sk);
+			return 0;
+		}
+	}
+	return 1;
+}
+
+/*
+ *	The TCP retransmit timer. This lacks a few small details.
+ *
+ *	1. 	An initial rtt timeout on the probe0 should cause what we can
+ *		of the first write queue buffer to be split and sent.
+ *	2.	On a 'major timeout' as defined by RFC1122 we shouldn't report
+ *		ETIMEDOUT if we know an additional 'soft' error caused this.
+ *		tcp_err should save a 'soft error' for us.
+ */
+
+void tcp_retransmit_timer(unsigned long data)
+{
+	struct sock *sk = (struct sock*)data;
+	int why = sk->ip_xmit_timeout;
+
+	/*
+	 *	We are reset. We will send no more retransmits.
+	 */
+	 
+	if(sk->zapped)
+		return;
+		
+	/* 
+	 *	Only process if socket is not in use
+	 */
+
+	cli();
+	if (sk->inuse || in_bh) 
+	{
+		/* Try again in 1 second */
+		sk->retransmit_timer.expires = jiffies+HZ;
+		add_timer(&sk->retransmit_timer);
+		sti();
+		return;
+	}
+
+	sk->inuse = 1;
+	sti();
+
+
+	if (sk->ack_backlog && !sk->dead) 
+		sk->data_ready(sk,0);
+
+	/* Now we need to figure out why the socket was on the timer. */
+
+	switch (why) 
+	{
+		/* Window probing */
+		case TIME_PROBE0:
+			tcp_send_probe0(sk);
+			tcp_write_timeout(sk);
+			break;
+		/* Retransmitting */
+		case TIME_WRITE:
+			/* It could be we got here because we needed to send an ack.
+			 * So we need to check for that.
+			 */
+		{
+			struct sk_buff *skb;
+			unsigned long flags;
+
+			save_flags(flags);
+			cli();
+			skb = sk->send_head;
+			if (!skb) 
+			{
+				if (sk->ack_backlog)
+					tcp_read_wakeup(sk);
+				restore_flags(flags);
+			} 
+			else 
+			{
+				/*
+				 *	Kicked by a delayed ack. Reset timer
+				 *	correctly now
+				 */
+				if (jiffies < skb->when + sk->rto) 
+				{
+					if (sk->ack_backlog)
+						tcp_read_wakeup(sk);
+					tcp_reset_xmit_timer (sk, TIME_WRITE, skb->when + sk->rto - jiffies);
+					restore_flags(flags);
+					break;
+				}
+				restore_flags(flags);
+				/*
+				 *	Retransmission
+				 */
+				sk->retransmits++;
+				sk->prot->retransmits++;
+				sk->prot->retransmit (sk, 0);
+				tcp_write_timeout(sk);
+			}
+			break;
+		}
+		/* Sending Keepalives */
+		case TIME_KEEPOPEN:
+			/* 
+			 * this reset_timer() call is a hack, this is not
+			 * how KEEPOPEN is supposed to work.
+			 */
+			tcp_reset_xmit_timer (sk, TIME_KEEPOPEN, TCP_TIMEOUT_LEN);
+
+			/* Send something to keep the connection open. */
+			if (sk->prot->write_wakeup)
+				  sk->prot->write_wakeup (sk);
+			sk->retransmits++;
+			sk->prot->retransmits++;
+			tcp_write_timeout(sk);
+			break;
+		default:
+			printk ("rexmit_timer: timer expired - reason unknown\n");
+			break;
+	}
+	release_sock(sk);
+}

net/ipv4/timer.c

@@ -141,7 +141,8 @@ void net_timer (unsigned long data)
 			}
 			if(sk->wmem_alloc==0 && sk->rmem_alloc==0)
 				destroy_sock(sk);	/* Socket gone, DON'T update sk->inuse! */
-				break;
+			break;
+
 		case TIME_CLOSE:
 			/* We've waited long enough, close the socket. */
 			sk->state = TCP_CLOSE;
@@ -152,6 +153,7 @@ void net_timer (unsigned long data)
 			reset_timer (sk, TIME_DESTROY, TCP_DONE_TIME);
 			release_sock (sk);
 			break;
+
 		default:
 			printk ("net_timer: timer expired - reason %d is unknown\n", why);
 			release_sock (sk);