Merge master.kernel.org:/home/bcrl/aio-2.5

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

Documentation/DocBook/Makefile

@@ -162,7 +162,6 @@ LOG     :=      $(patsubst %.sgml, %.log, $(BOOKS))
 OUT     :=      $(patsubst %.sgml, %.out, $(BOOKS))
 
 clean:
-	@rm -f core *~
 	@rm -f $(BOOKS)
 	@rm -f $(DVI) $(AUX) $(TEX) $(LOG) $(OUT)
 	@rm -f $(PNG-parportbook) $(EPS-parportbook)

Documentation/filesystems/00-INDEX

@@ -8,6 +8,8 @@ affs.txt
 	- info and mount options for the Amiga Fast File System.
 bfs.txt
 	- info for the SCO UnixWare Boot Filesystem (BFS).
+cifs.txt
+	- description of the CIFS filesystem
 coda.txt
 	- description of the CODA filesystem.
 cramfs.txt

Documentation/filesystems/cifs.txt

+This module, cifs, is a filesystem that implements the SMB/CIFS protocol, which is the
+protocol used by Windows based operating systems (including Windows 2000 and its successors)
+as well as Samba, OS/2 and many others operating systems and network file server appliances.
+The Cifs VFS filesystem module is designed to work well with servers that implement the newer versions
+(dialects) of the SMB/CIFS protocol such as Samba, the program written by Andrew Tridgell
+that turns any Unix host into a file server for DOS or Windows clients, as well as Windows NT,
+Windows 2000 and its successors.  It is not designed to handle older smb servers well, those that
+implement older versions of the dialect (such as OS/2 or Windows 95), for this purpose use smbfs.  
+
+This module can support mounting without a mount helper program.  The mount syntax is:
+        mount //server_ip_address/share_name  /mnt -o user=username,password=your_password
+where "username", "your_password" and "server_ip_address" and "share_name" should be replaced
+with specific values (supplied by the user) e.g.  
+	mount //9.53.216.16/public /mnt -o user=jsmith,password=openup  
+
+This cifs implementation is designed to handle network caching (safely) as well as to implement locking,
+large file (64 bit access), distributed file system ("dfs") and other advanced protocol features. It
+also implements the SNIA standard for Unix extensions to CIFS (when communicating with servers such as
+Samba 2.2.3 or later which support it).
+
+For more information contact sfrench@us.ibm.com
+
+Cifs is an SMB client (or gateway). For more info on the SMB/CIFS protocol and Samba, including
+documentation, please go to http://www.samba.org/ and then on to your nearest mirror.  For more
+information about the cifs vfs, go to the project page at:
+	http://us1.samba.org/samba/Linux_CIFS_client.html

Makefile

@@ -4,9 +4,9 @@ SUBLEVEL = 41
 EXTRAVERSION =
 
 # *DOCUMENTATION*
-# Too see a list of typical targets execute "make help"
+# To see a list of typical targets execute "make help"
 # More info can be located in ./Documentation/kbuild
-# Comments in this file is targeted only to the developer, do not
+# Comments in this file are targeted only to the developer, do not
 # expect to learn how to build the kernel reading this file.
 
 # We are using a recursive build, so we need to do a little thinking
@@ -142,7 +142,7 @@ NM		= $(CROSS_COMPILE)nm
 STRIP		= $(CROSS_COMPILE)strip
 OBJCOPY		= $(CROSS_COMPILE)objcopy
 OBJDUMP		= $(CROSS_COMPILE)objdump
-MAKEFILES	= $(TOPDIR)/.config
+MAKEFILES	= .config
 GENKSYMS	= /sbin/genksyms
 DEPMOD		= /sbin/depmod
 KALLSYMS	= /sbin/kallsyms
@@ -387,17 +387,17 @@ targets += arch/$(ARCH)/vmlinux.lds.s
 # Single targets
 # ---------------------------------------------------------------------------
 
-%.s: %.c FORCE
+%.s: %.c scripts FORCE
 	+@$(call descend,$(@D),$@)
-%.i: %.c FORCE
+%.i: %.c scripts FORCE
 	+@$(call descend,$(@D),$@)
-%.o: %.c FORCE
+%.o: %.c scripts FORCE
 	+@$(call descend,$(@D),$@)
-%.lst: %.c FORCE
+%.lst: %.c scripts FORCE
 	+@$(call descend,$(@D),$@)
-%.s: %.S FORCE
+%.s: %.S scripts FORCE
 	+@$(call descend,$(@D),$@)
-%.o: %.S FORCE
+%.o: %.S scripts FORCE
 	+@$(call descend,$(@D),$@)
 
 # 	FIXME: The asm symlink changes when $(ARCH) changes. That's
@@ -883,7 +883,7 @@ if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
 	@set -e; \
 	$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))';) \
 	$(cmd_$(1)); \
-	$(TOPDIR)/scripts/fixdep $(depfile) $@ $(TOPDIR) '$(cmd_$(1))' > $(@D)/.$(@F).tmp; \
+	scripts/fixdep $(depfile) $@ '$(cmd_$(1))' > $(@D)/.$(@F).tmp; \
 	rm -f $(depfile); \
 	mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
 

Rules.make

@@ -209,10 +209,10 @@ define rule_cc_ver_c
 	$(if $($(quiet)cmd_cc_ver_c),echo '  $($(quiet)cmd_cc_ver_c)';) \
 	$(cmd_cc_ver_c); \
 	if [ ! -r $(depfile) ]; then exit 1; fi; \
-	$(TOPDIR)/scripts/fixdep $(depfile) $@ $(TOPDIR) '$(cmd_cc_ver_c)' > $(@D)/.$(@F).tmp; \
+	scripts/fixdep $(depfile) $@ '$(cmd_cc_ver_c)' > $(@D)/.$(@F).tmp; \
 	rm -f $(depfile); \
 	if [ ! -r $@ ] || cmp -s $@ $@.tmp; then \
-	  touch $(TOPDIR)/include/linux/modversions.h; \
+	  touch include/linux/modversions.h; \
 	fi; \
 	mv -f $@.tmp $@
 	mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd
@@ -312,7 +312,7 @@ cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 	$(call if_changed_dep,cc_o_c)
 
 quiet_cmd_cc_lst_c = MKLST   $(echo_target)
-cmd_cc_lst_c       = $(CC) $(c_flags) -g -c -o $*.o $< && $(TOPDIR)/scripts/makelst $*.o $(TOPDIR)/System.map $(OBJDUMP) > $@
+cmd_cc_lst_c       = $(CC) $(c_flags) -g -c -o $*.o $< && sh scripts/makelst $*.o System.map $(OBJDUMP) > $@
 
 %.lst: %.c FORCE
 	$(call if_changed_dep,cc_lst_c)
@@ -561,7 +561,7 @@ if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
 	@set -e; \
 	$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))';) \
 	$(cmd_$(1)); \
-	$(TOPDIR)/scripts/fixdep $(depfile) $@ $(TOPDIR) '$(cmd_$(1))' > $(@D)/.$(@F).tmp; \
+	scripts/fixdep $(depfile) $@ '$(cmd_$(1))' > $(@D)/.$(@F).tmp; \
 	rm -f $(depfile); \
 	mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
 

arch/i386/Config.help

@@ -65,6 +65,14 @@ CONFIG_X86_NUMAQ
   You will need a new lynxer.elf file to flash your firmware with - send
   email to Martin.Bligh@us.ibm.com
 
+CONFIG_X86_CYCLONE
+  This patch used the Cyclone performance counter on IBM x440, x360,
+  and other Summit based systems for calculating gettimeofday. This 
+  fixes problems resulting from TSC skew found in multi-CEC system. 
+
+  If you are suffering from time skew using a multi-CEC system, say YES.
+  Otherwise it is safe to say NO.
+
 CONFIG_X86_UP_IOAPIC
   An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
   SMP-capable replacement for PC-style interrupt controllers. Most

arch/i386/Makefile

@@ -52,7 +52,8 @@ endif
 HEAD := arch/i386/kernel/head.o arch/i386/kernel/init_task.o
 
 libs-y 					+= arch/i386/lib/
-core-y					+= arch/i386/kernel/ arch/i386/mm/ \
+core-y					+= arch/i386/kernel/ \
+					   arch/i386/mm/ \
 					   arch/i386/$(MACHINE)/
 drivers-$(CONFIG_MATH_EMULATION)	+= arch/i386/math-emu/
 drivers-$(CONFIG_PCI)			+= arch/i386/pci/

arch/i386/kernel/Makefile

@@ -12,6 +12,7 @@ obj-y	:= process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \
 		bootflag.o
 
 obj-y				+= cpu/
+obj-y				+= timers/
 obj-$(CONFIG_X86_BIOS_REBOOT)	+= reboot.o
 obj-$(CONFIG_MCA)		+= mca.o
 obj-$(CONFIG_X86_MSR)		+= msr.o

arch/i386/kernel/timers/Makefile

+#
+# Makefile for x86 timers
+#
+
+obj-y := timer.o
+
+obj-y += timer_tsc.o
+obj-y += timer_pit.o
+obj-$(CONFIG_X86_CYCLONE)   += timer_cyclone.o
+
+include $(TOPDIR)/Rules.make

arch/i386/kernel/timers/timer.c

+#include <linux/kernel.h>
+#include <asm/timer.h>
+
+/* list of externed timers */
+extern struct timer_opts timer_pit;
+extern struct timer_opts timer_tsc;
+
+/* list of timers, ordered by preference, NULL terminated */
+static struct timer_opts* timers[] = {
+	&timer_tsc,
+#ifndef CONFIG_X86_TSC
+	&timer_pit,
+#endif
+	NULL,
+};
+
+
+/* iterates through the list of timers, returning the first 
+ * one that initializes successfully.
+ */
+struct timer_opts* select_timer(void)
+{
+	int i = 0;
+	
+	/* find most preferred working timer */
+	while (timers[i]) {
+		if (timers[i]->init)
+			if (timers[i]->init() == 0)
+				return timers[i];
+		++i;
+	}
+		
+	panic("select_timer: Cannot find a suitable timer\n");
+	return NULL;
+}

arch/i386/kernel/timers/timer_cyclone.c

+/*	Cyclone-timer: 
+ *		This code implements timer_ops for the cyclone counter found
+ *		on IBM x440, x360, and other Summit based systems.
+ *
+ *	Copyright (C) 2002 IBM, John Stultz (johnstul@us.ibm.com)
+ */
+
+
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/timex.h>
+
+#include <asm/timer.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/fixmap.h>
+
+extern spinlock_t i8253_lock;
+
+/* Number of usecs that the last interrupt was delayed */
+static int delay_at_last_interrupt;
+
+#define CYCLONE_CBAR_ADDR 0xFEB00CD0
+#define CYCLONE_PMCC_OFFSET 0x51A0
+#define CYCLONE_MPMC_OFFSET 0x51D0
+#define CYCLONE_MPCS_OFFSET 0x51A8
+#define CYCLONE_TIMER_FREQ 100000000
+
+int use_cyclone = 0;
+
+static u32* volatile cyclone_timer;	/* Cyclone MPMC0 register */
+static u32 last_cyclone_timer;
+
+static void mark_offset_cyclone(void)
+{
+	int count;
+	spin_lock(&i8253_lock);
+	/* quickly read the cyclone timer */
+	if(cyclone_timer)
+		last_cyclone_timer = cyclone_timer[0];
+
+	/* calculate delay_at_last_interrupt */
+	outb_p(0x00, 0x43);     /* latch the count ASAP */
+
+	count = inb_p(0x40);    /* read the latched count */
+	count |= inb(0x40) << 8;
+	spin_unlock(&i8253_lock);
+
+	count = ((LATCH-1) - count) * TICK_SIZE;
+	delay_at_last_interrupt = (count + LATCH/2) / LATCH;
+}
+
+static unsigned long get_offset_cyclone(void)
+{
+	u32 offset;
+
+	if(!cyclone_timer)
+		return delay_at_last_interrupt;
+
+	/* Read the cyclone timer */
+	offset = cyclone_timer[0];
+
+	/* .. relative to previous jiffy */
+	offset = offset - last_cyclone_timer;
+
+	/* convert cyclone ticks to microseconds */	
+	/* XXX slow, can we speed this up? */
+	offset = offset/(CYCLONE_TIMER_FREQ/1000000);
+
+	/* our adjusted time offset in microseconds */
+	return delay_at_last_interrupt + offset;
+}
+
+static int init_cyclone(void)
+{
+	u32* reg;	
+	u32 base;		/* saved cyclone base address */
+	u32 pageaddr;	/* page that contains cyclone_timer register */
+	u32 offset;		/* offset from pageaddr to cyclone_timer register */
+	int i;
+	
+	/*make sure we're on a summit box*/
+	/*XXX need to use proper summit hooks! such as xapic -john*/
+	if(!use_cyclone) return 0; 
+	
+	printk(KERN_INFO "Summit chipset: Starting Cyclone Counter.\n");
+
+	/* find base address */
+	pageaddr = (CYCLONE_CBAR_ADDR)&PAGE_MASK;
+	offset = (CYCLONE_CBAR_ADDR)&(~PAGE_MASK);
+	set_fixmap_nocache(FIX_CYCLONE_TIMER, pageaddr);
+	reg = (u32*)(fix_to_virt(FIX_CYCLONE_TIMER) + offset);
+	if(!reg){
+		printk(KERN_ERR "Summit chipset: Could not find valid CBAR register.\n");
+		return 0;
+	}
+	base = *reg;	
+	if(!base){
+		printk(KERN_ERR "Summit chipset: Could not find valid CBAR value.\n");
+		return 0;
+	}
+	
+	/* setup PMCC */
+	pageaddr = (base + CYCLONE_PMCC_OFFSET)&PAGE_MASK;
+	offset = (base + CYCLONE_PMCC_OFFSET)&(~PAGE_MASK);
+	set_fixmap_nocache(FIX_CYCLONE_TIMER, pageaddr);
+	reg = (u32*)(fix_to_virt(FIX_CYCLONE_TIMER) + offset);
+	if(!reg){
+		printk(KERN_ERR "Summit chipset: Could not find valid PMCC register.\n");
+		return 0;
+	}
+	reg[0] = 0x00000001;
+
+	/* setup MPCS */
+	pageaddr = (base + CYCLONE_MPCS_OFFSET)&PAGE_MASK;
+	offset = (base + CYCLONE_MPCS_OFFSET)&(~PAGE_MASK);
+	set_fixmap_nocache(FIX_CYCLONE_TIMER, pageaddr);
+	reg = (u32*)(fix_to_virt(FIX_CYCLONE_TIMER) + offset);
+	if(!reg){
+		printk(KERN_ERR "Summit chipset: Could not find valid MPCS register.\n");
+		return 0;
+	}
+	reg[0] = 0x00000001;
+
+	/* map in cyclone_timer */
+	pageaddr = (base + CYCLONE_MPMC_OFFSET)&PAGE_MASK;
+	offset = (base + CYCLONE_MPMC_OFFSET)&(~PAGE_MASK);
+	set_fixmap_nocache(FIX_CYCLONE_TIMER, pageaddr);
+	cyclone_timer = (u32*)(fix_to_virt(FIX_CYCLONE_TIMER) + offset);
+	if(!cyclone_timer){
+		printk(KERN_ERR "Summit chipset: Could not find valid MPMC register.\n");
+		return 0;
+	}
+
+	/*quick test to make sure its ticking*/
+	for(i=0; i<3; i++){
+		u32 old = cyclone_timer[0];
+		int stall = 100;
+		while(stall--) barrier();
+		if(cyclone_timer[0] == old){
+			printk(KERN_ERR "Summit chipset: Counter not counting! DISABLED\n");
+			cyclone_timer = 0;
+			return 0;
+		}
+	}
+
+	/* Everything looks good! */
+	return 1;
+}
+
+
+#if 0 /* XXX future work */
+static void delay_cyclone(unsigned long loops)
+{
+	unsigned long bclock, now;
+	if(!cyclone_timer)
+		return;
+	bclock = cyclone_timer[0];
+	do {
+		rep_nop();
+		now = cyclone_timer[0];
+	} while ((now-bclock) < loops);
+}
+#endif
+/************************************************************/
+
+/* cyclone timer_opts struct */
+struct timer_opts timer_cyclone = {
+	init: init_cyclone, 
+	mark_offset: mark_offset_cyclone, 
+	get_offset: get_offset_cyclone
+};

arch/i386/kernel/timers/timer_pit.c

+/*
+ * This code largely moved from arch/i386/kernel/time.c.
+ * See comments there for proper credits.
+ */
+
+#include <linux/spinlock.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <asm/timer.h>
+#include <asm/io.h>
+
+extern spinlock_t i8259A_lock;
+extern spinlock_t i8253_lock;
+#include "do_timer.h"
+
+static int init_pit(void)
+{
+	return 0;
+}
+
+static void mark_offset_pit(void)
+{
+	/* nothing needed */
+}
+
+
+/* This function must be called with interrupts disabled 
+ * It was inspired by Steve McCanne's microtime-i386 for BSD.  -- jrs
+ * 
+ * However, the pc-audio speaker driver changes the divisor so that
+ * it gets interrupted rather more often - it loads 64 into the
+ * counter rather than 11932! This has an adverse impact on
+ * do_gettimeoffset() -- it stops working! What is also not
+ * good is that the interval that our timer function gets called
+ * is no longer 10.0002 ms, but 9.9767 ms. To get around this
+ * would require using a different timing source. Maybe someone
+ * could use the RTC - I know that this can interrupt at frequencies
+ * ranging from 8192Hz to 2Hz. If I had the energy, I'd somehow fix
+ * it so that at startup, the timer code in sched.c would select
+ * using either the RTC or the 8253 timer. The decision would be
+ * based on whether there was any other device around that needed
+ * to trample on the 8253. I'd set up the RTC to interrupt at 1024 Hz,
+ * and then do some jiggery to have a version of do_timer that 
+ * advanced the clock by 1/1024 s. Every time that reached over 1/100
+ * of a second, then do all the old code. If the time was kept correct
+ * then do_gettimeoffset could just return 0 - there is no low order
+ * divider that can be accessed.
+ *
+ * Ideally, you would be able to use the RTC for the speaker driver,
+ * but it appears that the speaker driver really needs interrupt more
+ * often than every 120 us or so.
+ *
+ * Anyway, this needs more thought....		pjsg (1993-08-28)
+ * 
+ * If you are really that interested, you should be reading
+ * comp.protocols.time.ntp!
+ */
+
+static unsigned long get_offset_pit(void)
+{
+	int count;
+
+	static int count_p = LATCH;    /* for the first call after boot */
+	static unsigned long jiffies_p = 0;
+
+	/*
+	 * cache volatile jiffies temporarily; we have IRQs turned off. 
+	 */
+	unsigned long jiffies_t;
+
+	/* gets recalled with irq locally disabled */
+	spin_lock(&i8253_lock);
+	/* timer count may underflow right here */
+	outb_p(0x00, 0x43);	/* latch the count ASAP */
+
+	count = inb_p(0x40);	/* read the latched count */
+
+	/*
+	 * We do this guaranteed double memory access instead of a _p 
+	 * postfix in the previous port access. Wheee, hackady hack
+	 */
+ 	jiffies_t = jiffies;
+
+	count |= inb_p(0x40) << 8;
+	
+        /* VIA686a test code... reset the latch if count > max + 1 */
+        if (count > LATCH) {
+                outb_p(0x34, 0x43);
+                outb_p(LATCH & 0xff, 0x40);
+                outb(LATCH >> 8, 0x40);
+                count = LATCH - 1;
+        }
+	
+	spin_unlock(&i8253_lock);
+
+	/*
+	 * avoiding timer inconsistencies (they are rare, but they happen)...
+	 * there are two kinds of problems that must be avoided here:
+	 *  1. the timer counter underflows
+	 *  2. hardware problem with the timer, not giving us continuous time,
+	 *     the counter does small "jumps" upwards on some Pentium systems,
+	 *     (see c't 95/10 page 335 for Neptun bug.)
+	 */
+
+
+	if( jiffies_t == jiffies_p ) {
+		if( count > count_p ) {
+			/* the nutcase */
+			count = do_timer_overflow(count);
+		}
+	} else
+		jiffies_p = jiffies_t;
+
+	count_p = count;
+
+	count = ((LATCH-1) - count) * TICK_SIZE;
+	count = (count + LATCH/2) / LATCH;
+
+	return count;
+}
+
+
+/* tsc timer_opts struct */
+struct timer_opts timer_pit = {
+	.init =		init_pit, 
+	.mark_offset =	mark_offset_pit, 
+	.get_offset =	get_offset_pit,
+};

arch/i386/kernel/timers/timer_tsc.c

+/*
+ * This code largely moved from arch/i386/kernel/time.c.
+ * See comments there for proper credits.
+ */
+
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/timex.h>
+#include <linux/errno.h>
+
+#include <asm/timer.h>
+#include <asm/io.h>
+
+extern int x86_udelay_tsc;
+extern spinlock_t i8253_lock;
+
+static int use_tsc;
+/* Number of usecs that the last interrupt was delayed */
+static int delay_at_last_interrupt;
+
+static unsigned long last_tsc_low; /* lsb 32 bits of Time Stamp Counter */
+
+/* Cached *multiplier* to convert TSC counts to microseconds.
+ * (see the equation below).
+ * Equal to 2^32 * (1 / (clocks per usec) ).
+ * Initialized in time_init.
+ */
+unsigned long fast_gettimeoffset_quotient;
+
+static unsigned long get_offset_tsc(void)
+{
+	register unsigned long eax, edx;
+
+	/* Read the Time Stamp Counter */
+
+	rdtsc(eax,edx);
+
+	/* .. relative to previous jiffy (32 bits is enough) */
+	eax -= last_tsc_low;	/* tsc_low delta */
+
+	/*
+         * Time offset = (tsc_low delta) * fast_gettimeoffset_quotient
+         *             = (tsc_low delta) * (usecs_per_clock)
+         *             = (tsc_low delta) * (usecs_per_jiffy / clocks_per_jiffy)
+	 *
+	 * Using a mull instead of a divl saves up to 31 clock cycles
+	 * in the critical path.
+         */
+
+	__asm__("mull %2"
+		:"=a" (eax), "=d" (edx)
+		:"rm" (fast_gettimeoffset_quotient),
+		 "0" (eax));
+
+	/* our adjusted time offset in microseconds */
+	return delay_at_last_interrupt + edx;
+}
+
+static void mark_offset_tsc(void)
+{
+	int count;
+	/*
+	 * It is important that these two operations happen almost at
+	 * the same time. We do the RDTSC stuff first, since it's
+	 * faster. To avoid any inconsistencies, we need interrupts
+	 * disabled locally.
+	 */
+
+	/*
+	 * Interrupts are just disabled locally since the timer irq
+	 * has the SA_INTERRUPT flag set. -arca
+	 */
+	
+	/* read Pentium cycle counter */
+
+	rdtscl(last_tsc_low);
+
+	spin_lock(&i8253_lock);
+	outb_p(0x00, 0x43);     /* latch the count ASAP */
+
+	count = inb_p(0x40);    /* read the latched count */
+	count |= inb(0x40) << 8;
+	spin_unlock(&i8253_lock);
+
+	count = ((LATCH-1) - count) * TICK_SIZE;
+	delay_at_last_interrupt = (count + LATCH/2) / LATCH;
+}
+
+
+/* ------ Calibrate the TSC ------- 
+ * Return 2^32 * (1 / (TSC clocks per usec)) for do_fast_gettimeoffset().
+ * Too much 64-bit arithmetic here to do this cleanly in C, and for
+ * accuracy's sake we want to keep the overhead on the CTC speaker (channel 2)
+ * output busy loop as low as possible. We avoid reading the CTC registers
+ * directly because of the awkward 8-bit access mechanism of the 82C54
+ * device.
+ */
+
+#define CALIBRATE_LATCH	(5 * LATCH)
+#define CALIBRATE_TIME	(5 * 1000020/HZ)
+
+static unsigned long __init calibrate_tsc(void)
+{
+       /* Set the Gate high, disable speaker */
+	outb((inb(0x61) & ~0x02) | 0x01, 0x61);
+
+	/*
+	 * Now let's take care of CTC channel 2
+	 *
+	 * Set the Gate high, program CTC channel 2 for mode 0,
+	 * (interrupt on terminal count mode), binary count,
+	 * load 5 * LATCH count, (LSB and MSB) to begin countdown.
+	 */
+	outb(0xb0, 0x43);			/* binary, mode 0, LSB/MSB, Ch 2 */
+	outb(CALIBRATE_LATCH & 0xff, 0x42);	/* LSB of count */
+	outb(CALIBRATE_LATCH >> 8, 0x42);	/* MSB of count */
+
+	{
+		unsigned long startlow, starthigh;
+		unsigned long endlow, endhigh;
+		unsigned long count;
+
+		rdtsc(startlow,starthigh);
+		count = 0;
+		do {
+			count++;
+		} while ((inb(0x61) & 0x20) == 0);
+		rdtsc(endlow,endhigh);
+
+		last_tsc_low = endlow;
+
+		/* Error: ECTCNEVERSET */
+		if (count <= 1)
+			goto bad_ctc;
+
+		/* 64-bit subtract - gcc just messes up with long longs */
+		__asm__("subl %2,%0\n\t"
+			"sbbl %3,%1"
+			:"=a" (endlow), "=d" (endhigh)
+			:"g" (startlow), "g" (starthigh),
+			 "0" (endlow), "1" (endhigh));
+
+		/* Error: ECPUTOOFAST */
+		if (endhigh)
+			goto bad_ctc;
+
+		/* Error: ECPUTOOSLOW */
+		if (endlow <= CALIBRATE_TIME)
+			goto bad_ctc;
+
+		__asm__("divl %2"
+			:"=a" (endlow), "=d" (endhigh)
+			:"r" (endlow), "0" (0), "1" (CALIBRATE_TIME));
+
+		return endlow;
+	}
+
+	/*
+	 * The CTC wasn't reliable: we got a hit on the very first read,
+	 * or the CPU was so fast/slow that the quotient wouldn't fit in
+	 * 32 bits..
+	 */
+bad_ctc:
+	return 0;
+}
+
+
+#ifdef CONFIG_CPU_FREQ
+
+static int
+time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
+		       void *data)
+{
+	struct cpufreq_freqs *freq = data;
+	unsigned int i;
+
+	if (!cpu_has_tsc)
+		return 0;
+
+	switch (val) {
+	case CPUFREQ_PRECHANGE:
+		if ((freq->old < freq->new) &&
+		((freq->cpu == CPUFREQ_ALL_CPUS) || (freq->cpu == 0)))  {
+			cpu_khz = cpufreq_scale(cpu_khz, freq->old, freq->new);
+		        fast_gettimeoffset_quotient = cpufreq_scale(fast_gettimeoffset_quotient, freq->new, freq->old);
+		}
+		for (i=0; i<NR_CPUS; i++)
+			if ((freq->cpu == CPUFREQ_ALL_CPUS) || (freq->cpu == i))
+				cpu_data[i].loops_per_jiffy = cpufreq_scale(cpu_data[i].loops_per_jiffy, freq->old, freq->new);
+		break;
+
+	case CPUFREQ_POSTCHANGE:
+		if ((freq->new < freq->old) &&
+		((freq->cpu == CPUFREQ_ALL_CPUS) || (freq->cpu == 0)))  {
+			cpu_khz = cpufreq_scale(cpu_khz, freq->old, freq->new);
+		        fast_gettimeoffset_quotient = cpufreq_scale(fast_gettimeoffset_quotient, freq->new, freq->old);
+		}
+		for (i=0; i<NR_CPUS; i++)
+			if ((freq->cpu == CPUFREQ_ALL_CPUS) || (freq->cpu == i))
+				cpu_data[i].loops_per_jiffy = cpufreq_scale(cpu_data[i].loops_per_jiffy, freq->old, freq->new);
+		break;
+	}
+
+	return 0;
+}
+
+static struct notifier_block time_cpufreq_notifier_block = {
+	notifier_call:	time_cpufreq_notifier
+};
+#endif
+
+
+static int init_tsc(void)
+{
+	/*
+	 * If we have APM enabled or the CPU clock speed is variable
+	 * (CPU stops clock on HLT or slows clock to save power)
+	 * then the TSC timestamps may diverge by up to 1 jiffy from
+	 * 'real time' but nothing will break.
+	 * The most frequent case is that the CPU is "woken" from a halt
+	 * state by the timer interrupt itself, so we get 0 error. In the
+	 * rare cases where a driver would "wake" the CPU and request a
+	 * timestamp, the maximum error is < 1 jiffy. But timestamps are
+	 * still perfectly ordered.
+	 * Note that the TSC counter will be reset if APM suspends
+	 * to disk; this won't break the kernel, though, 'cuz we're
+	 * smart.  See arch/i386/kernel/apm.c.
+	 */
+ 	/*
+ 	 *	Firstly we have to do a CPU check for chips with
+ 	 * 	a potentially buggy TSC. At this point we haven't run
+ 	 *	the ident/bugs checks so we must run this hook as it
+ 	 *	may turn off the TSC flag.
+ 	 *
+ 	 *	NOTE: this doesnt yet handle SMP 486 machines where only
+ 	 *	some CPU's have a TSC. Thats never worked and nobody has
+ 	 *	moaned if you have the only one in the world - you fix it!
+ 	 */
+ 
+ 	dodgy_tsc();
+ 	
+	if (cpu_has_tsc) {
+		unsigned long tsc_quotient = calibrate_tsc();
+		if (tsc_quotient) {
+			fast_gettimeoffset_quotient = tsc_quotient;
+			use_tsc = 1;
+			/*
+			 *	We could be more selective here I suspect
+			 *	and just enable this for the next intel chips ?
+			 */
+			x86_udelay_tsc = 1;
+
+			/* report CPU clock rate in Hz.
+			 * The formula is (10^6 * 2^32) / (2^32 * 1 / (clocks/us)) =
+			 * clock/second. Our precision is about 100 ppm.
+			 */
+			{	unsigned long eax=0, edx=1000;
+				__asm__("divl %2"
+		       		:"=a" (cpu_khz), "=d" (edx)
+        	       		:"r" (tsc_quotient),
+	                	"0" (eax), "1" (edx));
+				printk("Detected %lu.%03lu MHz processor.\n", cpu_khz / 1000, cpu_khz % 1000);
+			}
+#ifdef CONFIG_CPU_FREQ
+			cpufreq_register_notifier(&time_cpufreq_notifier_block, CPUFREQ_TRANSITION_NOTIFIER);
+#endif
+			return 0;
+		}
+	}
+	return -ENODEV;
+}
+
+/************************************************************/
+
+/* tsc timer_opts struct */
+struct timer_opts timer_tsc = {
+	.init =		init_tsc,
+	.mark_offset =	mark_offset_tsc, 
+	.get_offset =	get_offset_tsc,
+};

drivers/cdrom/cdrom.c

@@ -689,21 +689,28 @@ static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
 
 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
 {
-	struct cdrom_changer_info info;
+	struct cdrom_changer_info *info;
 	int ret;
 
 	cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n"); 
 	if (cdi->sanyo_slot)
 		return CDS_NO_INFO;
 	
-	if ((ret = cdrom_read_mech_status(cdi, &info)))
-		return ret;
+	info = kmalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	if ((ret = cdrom_read_mech_status(cdi, info)))
+		goto out_free;
 
-	if (info.slots[slot].disc_present)
-		return CDS_DISC_OK;
+	if (info->slots[slot].disc_present)
+		ret = CDS_DISC_OK;
 	else
-		return CDS_NO_DISC;
+		ret = CDS_NO_DISC;
 
+out_free:
+	kfree(info);
+	return ret;
 }
 
 /* Return the number of slots for an ATAPI/SCSI cdrom, 
@@ -713,15 +720,20 @@ int cdrom_number_of_slots(struct cdrom_device_info *cdi)
 {
 	int status;
 	int nslots = 1;
-	struct cdrom_changer_info info;
+	struct cdrom_changer_info *info;
 
 	cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 
 	/* cdrom_read_mech_status requires a valid value for capacity: */
 	cdi->capacity = 0; 
 
-	if ((status = cdrom_read_mech_status(cdi, &info)) == 0)
-		nslots = info.hdr.nslots;
+	info = kmalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	if ((status = cdrom_read_mech_status(cdi, info)) == 0)
+		nslots = info->hdr.nslots;
 
+	kfree(info);
 	return nslots;
 }
 
@@ -755,7 +767,7 @@ static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
 
 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
 {
-	struct cdrom_changer_info info;
+	struct cdrom_changer_info *info;
 	int curslot;
 	int ret;
 
@@ -771,10 +783,17 @@ static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
 		return cdrom_load_unload(cdi, -1);
 	}
 
-	if ((ret = cdrom_read_mech_status(cdi, &info)))
+	info = kmalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	if ((ret = cdrom_read_mech_status(cdi, info))) {
+		kfree(info);
 		return ret;
+	}
 
-	curslot = info.hdr.curslot;
+	curslot = info->hdr.curslot;
+	kfree(info);
 
 	if (cdi->use_count > 1 || keeplocked) {
 		if (slot == CDSL_CURRENT) {
@@ -1502,7 +1521,8 @@ int cdrom_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 		}
 
 	case CDROM_MEDIA_CHANGED: {
-		struct cdrom_changer_info info;
+		struct cdrom_changer_info *info;
+		int changed;
 
 		cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 
 		if (!CDROM_CAN(CDC_MEDIA_CHANGED))
@@ -1515,10 +1535,18 @@ int cdrom_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 		if ((unsigned int)arg >= cdi->capacity)
 			return -EINVAL;
 
-		if ((ret = cdrom_read_mech_status(cdi, &info)))
+		info = kmalloc(sizeof(*info), GFP_KERNEL);
+		if (!info)
+			return -ENOMEM;
+
+		if ((ret = cdrom_read_mech_status(cdi, info))) {
+			kfree(info);
 			return ret;
+		}
 
-		return info.slots[arg].change;
+		changed = info->slots[arg].change;
+		kfree(info);
+		return changed;
 		}
 
 	case CDROM_SET_OPTIONS: {

drivers/char/raw.c

@@ -30,6 +30,10 @@ static struct file_operations raw_ctl_fops;
 /*
  * Open/close code for raw IO.
  *
+ * We just rewrite the i_mapping for the /dev/raw/rawN file descriptor to
+ * point at the blockdev's address_space and set the file handle to use
+ * O_DIRECT.
+ *
  * Set the device's soft blocksize to the minimum possible.  This gives the
  * finest possible alignment and has no adverse impact on performance.
  */
@@ -56,7 +60,12 @@ static int raw_open(struct inode *inode, struct file *filp)
 		err = blkdev_get(bdev, filp->f_mode, 0, BDEV_RAW);
 		if (!err) {
 			err = set_blocksize(bdev, bdev_hardsect_size(bdev));
-			raw_devices[minor].inuse++;
+			if (err == 0) {
+				raw_devices[minor].inuse++;
+				filp->f_dentry->d_inode->i_mapping =
+					bdev->bd_inode->i_mapping;
+				filp->f_flags |= O_DIRECT;
+			}
 		}
 	}
 	up(&raw_mutex);
@@ -200,72 +209,22 @@ raw_ctl_ioctl(struct inode *inode, struct file *filp,
 	return err;
 }
 
-static ssize_t
-rw_raw_dev(int rw, struct file *filp, const struct iovec *iov, unsigned long nr_segs, loff_t *offp)
-{
-	const int minor = minor(filp->f_dentry->d_inode->i_rdev);
-	struct block_device *bdev = raw_devices[minor].binding;
-	struct inode *inode = bdev->bd_inode;
- 	size_t count = iov_length(iov, nr_segs); 
-	ssize_t ret = 0;
-
-	if (count == 0)
-		goto out;	
-
-	if ((ssize_t)count < 0)
-		return -EINVAL;	
-
-	if (*offp >= inode->i_size) 
-		return -ENXIO;
-
-	if (count + *offp > inode->i_size) {
-		count = inode->i_size - *offp;
-		nr_segs = iov_shorten((struct iovec *)iov, nr_segs, count);
-	}
-	ret = generic_file_direct_IO(rw, filp, iov, *offp, nr_segs);
-
-	if (ret > 0)
-		*offp += ret;
-out:
-	return ret;
-}
-
-static ssize_t
-raw_read(struct file *filp, char *buf, size_t size, loff_t *offp)
-{
-	struct iovec local_iov = { .iov_base = buf, .iov_len = size};
-
-	return rw_raw_dev(READ, filp, &local_iov, 1, offp);
-}
-
-static ssize_t
-raw_write(struct file *filp, const char *buf, size_t size, loff_t *offp)
+static ssize_t raw_file_write(struct file *file, const char *buf,
+				   size_t count, loff_t *ppos)
 {
-	struct iovec local_iov = { .iov_base = (char *)buf, .iov_len = size};
+	struct iovec local_iov = { .iov_base = (void *)buf, .iov_len = count };
 
-	return rw_raw_dev(WRITE, filp, &local_iov, 1, offp);
-}
-
-static ssize_t 
-raw_readv(struct file *filp, const struct iovec *iov, unsigned long nr_segs, loff_t *offp) 
-{
-	return rw_raw_dev(READ, filp, iov, nr_segs, offp);
-}
-
-static ssize_t 
-raw_writev(struct file *filp, const struct iovec *iov, unsigned long nr_segs, loff_t *offp) 
-{
-	return rw_raw_dev(WRITE, filp, iov, nr_segs, offp);
+	return generic_file_write_nolock(file, &local_iov, 1, ppos);
 }
 
 static struct file_operations raw_fops = {
-	.read	=	raw_read,
-	.write	=	raw_write,
+	.read	=	generic_file_read,
+	.write	=	raw_file_write,
 	.open	=	raw_open,
 	.release=	raw_release,
 	.ioctl	=	raw_ioctl,
-	.readv	= 	raw_readv,
-	.writev	= 	raw_writev,
+	.readv	= 	generic_file_readv,
+	.writev	= 	generic_file_writev,
 	.owner	=	THIS_MODULE,
 };
 

drivers/scsi/Makefile

@@ -137,7 +137,7 @@ include $(TOPDIR)/Rules.make
 $(obj)/53c7,8xx.o: $(obj)/53c8xx_d.h $(obj)/53c8xx_u.h
 $(obj)/53c7xx.o:   $(obj)/53c7xx_d.h $(obj)/53c7xx_u.h
 $(obj)/sim710.o:   $(obj)/sim710_d.h
-$(obj)/53c700.o $(MODVERDIR)/53c700.ver: $(obj)/53c700_d.h
+$(obj)/53c700.o $(MODVERDIR)/$(obj)/53c700.ver: $(obj)/53c700_d.h
 
 # If you want to play with the firmware, uncomment
 # GENERATE_FIRMWARE := 1
@@ -162,4 +162,4 @@ $(obj)/sim710_u.h: $(obj)/sim710_d.h
 $(obj)/53c700_d.h: $(src)/53c700.scr $(src)/script_asm.pl
 	$(PERL) -s $(src)/script_asm.pl -ncr7x0_family $@ $(@:_d.h=_u.h) < $<
 
-endif
\ No newline at end of file
+endif

drivers/scsi/aacraid/Makefile

-
-EXTRA_CFLAGS	+= -I$(TOPDIR)/drivers/scsi
-
+# Adaptec aacraid
+ 
 obj-$(CONFIG_SCSI_AACRAID) := aacraid.o
 
 aacraid-objs	:= linit.o aachba.o commctrl.o comminit.o commsup.o \

drivers/scsi/atp870u.c

@@ -902,10 +902,12 @@ static void tscam(struct Scsi_Host *host)
 		0x38, 0x31, 0x32, 0x2b, 0x34, 0x2d, 0x2e, 0x27
 	};
 
-
+/*  I can't believe we need this before we've even done anything.  Remove it
+ *  and see if anyone bitches.
 	for (i = 0; i < 0x10; i++) {
 		udelay(0xffff);
 	}
+ */
 
 	tmport = dev->ioport + 1;
 	outb(0x08, tmport++);
@@ -993,8 +995,7 @@ static void tscam(struct Scsi_Host *host)
 	inb(0x80);		/* 2 deskew delay(45ns*2=90ns) */
 	val &= 0x007f;		/* no bsy  */
 	outw(val, tmport);
-	udelay(0xffff);		/* recommanded SCAM selection response time */
-	udelay(0xffff);
+	mdelay(128);
 	val &= 0x00fb;		/* after 1ms no msg */
 	outw(val, tmport);
 wait_nomsg:
@@ -2420,9 +2421,9 @@ static int atp870u_detect(Scsi_Host_Template * tpnt)
 			k = (inb(tmport) & 0xf3) | 0x10;
 			outb(k, tmport);
 			outb((k & 0xdf), tmport);
-			udelay(0x8000);
+			mdelay(32);
 			outb(k, tmport);
-			udelay(0x8000);
+			mdelay(32);
 			tmport = base_io;
 			outb((host_id | 0x08), tmport);
 			tmport += 0x18;
@@ -2539,9 +2540,9 @@ static int atp870u_detect(Scsi_Host_Template * tpnt)
 			outb(k, tmport);
 			tmport += 0x03;
 			outb(0x20, tmport);
-			udelay(0x8000);
+			mdelay(32);
 			outb(0, tmport);
-			udelay(0x8000);
+			mdelay(32);
 			tmport = base_io + 0x5b;
 			inb(tmport);
 			tmport -= 0x04;
@@ -2581,7 +2582,7 @@ static int atp870u_detect(Scsi_Host_Template * tpnt)
 			shpnt->n_io_port = 0x40;	/* Number of bytes of I/O space used */
 		}
 		shpnt->irq = irq;
-		restore_flags(flags);
+		spin_unlock_irqrestore(shpnt->host_lock, flags);
 		if (dev_id[h] == 0x8081) {
 			request_region(base_io, 0x60, "atp870u");	/* Register the IO ports that we use */
 		} else {

fs/Config.help

@@ -950,6 +950,33 @@ CONFIG_VXFS_FS
   module, say M here and read <file:Documentation/modules.txt>.  If
   unsure, say N.
 
+CIFS (Common Internet File System) support
+CONFIG_CIFS
+  This is the client VFS module for the Common Internet File System
+  (CIFS) protocol which is the successor to the Server Message Block 
+  (SMB) protocol, the native file sharing mechanism for most early
+  PC operating systems.  CIFS is fully supported by current network
+  file servers such as Windows 2000 (including Windows NT version 4 
+  and Windows XP) as well by Samba (which provides excellent CIFS
+  server support for Linux and many other operating systems).  For
+  production systems the smbfs module may be used instead of this
+  cifs module since smbfs is currently more stable and provides
+  support for older servers.  The intent of this module is to provide the
+  most advanced network file system function for CIFS compliant servers, 
+  including support for dfs (heirarchical name space), secure per-user
+  session establishment, safe distributed caching (oplock), optional
+  packet signing, Unicode and other internationalization improvements, and
+  optional Winbind (nsswitch) integration.  This module is in an early
+  development stage, so unless you are specifically interested in this
+  filesystem, just say N.
+
+CIFS Debugging
+CONFIG_CIFS_DEBUG
+  If you are experiencing any problems with the CIFS filesystem, say
+  Y here.  This will result in additional debugging messages to be
+  written to the system log.  Under normal circumstances, this
+  results in very little overhead.  
+
 CONFIG_SMB_FS
   SMB (Server Message Block) is the protocol Windows for Workgroups
   (WfW), Windows 95/98, Windows NT and OS/2 Lan Manager use to share

fs/Config.in

@@ -140,6 +140,8 @@ if [ "$CONFIG_NET" = "y" ]; then
    fi
    define_tristate CONFIG_EXPORTFS $CONFIG_NFSD
 
+   dep_tristate 'CIFS support (advanced network filesystem for Samba, Window and other CIFS compliant servers)(EXPERIMENTAL)' CONFIG_CIFS $CONFIG_INET
+
    dep_tristate 'SMB file system support (to mount Windows shares etc.)' CONFIG_SMB_FS $CONFIG_INET
    if [ "$CONFIG_SMB_FS" != "n" ]; then
       bool '  Use a default NLS' CONFIG_SMB_NLS_DEFAULT

fs/Makefile

@@ -65,6 +65,7 @@ obj-$(CONFIG_LOCKD)		+= lockd/
 obj-$(CONFIG_NLS)		+= nls/
 obj-$(CONFIG_SYSV_FS)		+= sysv/
 obj-$(CONFIG_SMB_FS)		+= smbfs/
+obj-$(CONFIG_CIFS)             += cifs/
 obj-$(CONFIG_NCP_FS)		+= ncpfs/
 obj-$(CONFIG_HPFS_FS)		+= hpfs/
 obj-$(CONFIG_NTFS_FS)		+= ntfs/

fs/cifs/AUTHORS

+Original Author
+===============
+Steve French (sfrench@samba.org)
+
+The author wishes to express his appreciation and thanks to:
+Andrew Tridgell (Samba team) for his early suggestions about smb/cifs VFS
+improvements. Thanks to IBM for allowing me the time and test resources to pursue
+this project. Jim McDonough from IBM (and the Samba Team) for his help.
+The IBM Linux JFS team for explaining many esoteric Linux filesystem features.
+Dave Boutcher of IBM Rochester (author of the OS/400 smb/cifs filesystem client)
+for proving years ago that a very good smb/cifs client could be done on a Unix like 
+operating system.  Volker Lendecke, Andrew Tridgell, Urban Widmark, John Newbigin 
+and others for their work on the Linux smbfs module over the years. Thanks to
+the other members of the Storage Network Industry Association CIFS Technical
+Workgroup for their work specifying this highly complex protocol and finally
+thanks to the Samba team for their technical advice and encouragement.

fs/cifs/CHANGES

+Version 0.54
+------------
+Fix problem with captive thread hanging around at unmount time.  Adjust to 2.5.42-pre
+changes to superblock layout.   Remove wasteful allocation of smb buffers (now the send 
+buffer is reused for responses).  Add more oplock handling. Additional minor cleanup.
+
+Version 0.53
+------------
+More stylistic updates to better match kernel style.  Add additional statistics
+for filesystem which can be viewed via /proc/fs/cifs.  Add more pieces of NTLMv2
+and CIFS Packet Signing enablement.
+
+Version 0.52
+------------
+Replace call to sleep_on with safer wait_on_event.
+Make stylistic changes to better match kernel style recommendations.
+Remove most typedef usage (except for the PDUs themselves).
+
+Version 0.51
+------------
+Update mount so the -unc mount option is no longer required (the ip address can be specified
+in a UNC style device name.   Implementation of readpage/writepage started.
+
+Version 0.50
+------------
+Fix intermittent problem with incorrect smb header checking on badly 
+fragmented tcp responses
+
+Version 0.49
+------------
+Fixes to setting of allocation size and file size.
+
+Version 0.48
+------------
+Various 2.5.38 fixes.  Now works on 2.5.38
+
+Version 0.47
+------------
+Prepare for 2.5 kernel merge.  Remove ifdefs.
+
+Version 0.46
+------------
+Socket buffer management fixes.  Fix dual free.
+
+Version 0.45
+------------
+Various big endian fixes for hardlinks and symlinks and also for dfs.
+
+Version 0.44
+------------
+Various big endian fixes for servers with Unix extensions such as Samba
+
+Version 0.43
+------------
+Various FindNext fixes for incorrect filenames on large directory searches on big endian
+clients.  basic posix file i/o tests now work on big endian machines, not just le
+
+Version 0.42
+------------
+SessionSetup and NegotiateProtocol now work from Big Endian machines.
+Various Big Endian fixes found during testing on the Linux on 390.  Various fixes for compatability with older
+versions of 2.4 kernel (now builds and works again on kernels at least as early as 2.4.7).
+
+Version 0.41
+------------
+Various minor fixes for Connectathon Posix "basic" file i/o test suite.  Directory caching fixed so hardlinked
+files now return the correct rumber of links on fstat as they are repeatedly linked and unlinked.
+
+Version 0.40
+------------
+Implemented "Raw" (i.e. not encapsulated in SPNEGO) NTLMSSP (i.e. the Security Provider Interface used to negotiate
+session advanced session authentication).  Raw NTLMSSP is preferred by Windows 2000 Professional and Windows XP.
+Began implementing support for SPNEGO encapsulation of NTLMSSP based session authentication blobs
+(which is the mechanism preferred by Windows 2000 server in the absence of Kerberos).
+
+Version 0.38
+------------
+Introduced optional mount helper utility mount.cifs and made coreq changes to cifs vfs to enable
+it. Fixed a few bugs in the DFS code (e.g. bcc two bytes too short and incorrect uid in PDU).
+
+Version 0.37
+------------
+Rewrote much of connection and mount/unmount logic to handle bugs with
+multiple uses to same share, multiple users to same server etc.
+
+Version 0.36
+------------
+Fixed major problem with dentry corruption (missing call to dput)
+
+Version 0.35
+------------
+Rewrite of readdir code to fix bug. Various fixes for bigendian machines.
+Begin adding oplock support.  Multiusermount and oplockEnabled flags added to /proc/fs/cifs
+although corresponding function not fully implemented in the vfs yet
+
+Version 0.34
+------------
+Fixed dentry caching bug, misc. cleanup 
+
+Version 0.33
+------------
+Fixed 2.5 support to handle build and configure changes as well as misc. 2.5 changes.  Now can build
+on current 2.5 beta version (2.5.24) of the Linux kernel as well as on 2.4 Linux kernels.
+Support for STATUS codes (newer 32 bit NT error codes) added.  DFS support begun to be added.
+
+Version 0.32
+------------
+Unix extensions (symlink, readlink, hardlink, chmod and some chgrp and chown) implemented
+and tested against Samba 2.2.5
+
+
+Version 0.31
+------------
+1) Fixed lockrange to be correct (it was one byte too short)
+
+2) Fixed GETLK (i.e. the fcntl call to test a range of bytes in a file to see if locked) to correctly 
+show range as locked when there is a conflict with an existing lock.
+
+3) default file perms are now 2767 (indicating support for mandatory locks) instead of 777 for directories
+in most cases.  Eventually will offer optional ability to query server for the correct perms.
+
+3) Fixed eventual trap when mounting twice to different shares on the same server when the first succeeded 
+but the second one was invalid and failed (the second one was incorrectly disconnecting the tcp and smb
+session) 
+
+4) Fixed error logging of valid mount options
+
+5) Removed logging of password field.
+
+6) Moved negotiate, treeDisconnect and uloggoffX (only tConx and SessSetup remain in connect.c) to cifssmb.c
+and cleaned them up and made them more consistent with other cifs functions. 
+
+7) Server support for Unix extensions is now fully detected and FindFirst is implemented both ways 
+(with or without Unix exentions) but FindNext and QueryPathInfo with the Unix extensions are not completed,
+nor is the symlink support using the Unix extensions
+
+8) Started adding the readlink and follow_link code 
+
+Version 0.3 
+-----------
+Initial drop
+

fs/cifs/Makefile

+#
+# Makefile for Linux CIFS VFS client 
+#
+obj-$(CONFIG_CIFS) += cifs.o
+
+cifs-objs := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o link.o misc.o netmisc.o smbdes.o smbencrypt.o transport.o asn1.o md4.o md5.o cifs_unicode.o nterr.o
+
+include $(TOPDIR)/Rules.make

fs/cifs/README

+This is the CIFS VFS support for Linux.  It supports many advanced network filesystem
+features such as heirarchical dfs like filesystem, hardlinks, locking and more.
+It was designed to comply with the SNIA CIFS Technical Reference (which supersedes
+the 1992 X/Open SMB Standard) as well as to perform best practice practical
+interoperability with Windows 2000, Windows XP, Samba and equivalent 
+servers.  
+
+For questions or bug reports please contact sfrench@samba.org (sfrench@us.ibm.com)
+
+Build instructions:
+==================
+extract the kernel from http://www.cifs.bkbits.net/linux-2.5 or 
+http://www.cifs.bkbits.net/linux-2.4  
+make menuconfig (or make xconfig)
+select cifs from within the network filesystem choices
+save and exit
+make dep
+make modules  (or "make" if you did not select CIFS VFS to be built as a module)
+
+Installation instructions:
+=========================
+If you have built the CIFS vfs as module (successfully)you
+simply type "make modules_install" (or if you prefer manually copy the file to
+the modules directory e.g. /lib/modules/2.4.10-4GB/kernel/fs/cifs/cifs.o).
+
+If you have built the CIFS vfs into the kernel itself, follow the instructions
+for your distribution on how to install a new kernel (usually you
+would simply type "make install").
+
+If you do not have the utility mount.cifs (in the Samba 3.0 source tree and on the
+CIFS VFS web site) copy it to the directory /sbin (or the same directory in which 
+mount.smbfs resides).  Although no helper software is required, the installation
+of mount.cifs is recommended.  Eventually the Samba 3.0 utility program "net" 
+may also be helpful since it may someday provide easier mount syntax for users used 
+to Windows e.g.
+	 net use <mount point> <UNC name or cifs URL> 	 
+and there will likely be other helper programs available ala smbmount to provide
+additional optional function in the future.  Note that running Winbind on all
+of your Linux clients is useful in mapping Uids and Gids consistently to the
+proper network user.	
+
+Samba Considerations
+====================
+To get the maximum benefit from the CIFS VFS, we recommend using a server that
+supports the SNIA CIFS Unix Extensions standard (e.g. Samba 2.2.5 or Samba 3.0)
+but the CIFS vfs works fine with a wide variety of CIFS servers.  Note that the
+uid, gid and file permissions will display default values if you do not have
+a server that supports the Unix extensions for CIFS (such as Samba 2.2.3 or
+later).   To enable the Unix CIFS Extensions in the Samba server, add the line:
+	unix extensions = yes
+to your smb.conf file on the server.  Note that the following smb.conf settings are
+also useful (on the Samba server) when the majority of clients are Unix
+or Linux:
+	case sensitive = yes
+	delete readonly = yes
+Some administrators also change the "map archive" and the "create mask" parameters
+from their defaults. For more information on these see the manual pages 
+("man smb.conf") on the Samba server system.  Note that the cifs vfs, unlike the
+smbfs vfs, does not read the smb.conf on the client system (the few optional settings
+are passed in on mount via -o parameters instead).
+
+Use instructions:
+================
+Once the CIFS VFS support is built into the kernel or installed as a module (cifs.o),
+you can use mount syntax like the following to access Samba or Windows servers:
+  mount -t cifs //9.53.216.11/e$ /mnt -o user=myname,pass=mypassword
+after -o the following cifs vfs specific options are supported:
+  user=<username>
+  pass=<password>
+  domain=<domain name>
+TCP names (in addition to ip addresses) will be available when the mount helper
+(mount.cifs) is complete
+
+Restrictions
+============
+Servers must support the NTLM SMB dialect (which is the most recent, supported by Samba
+and Windows NT, 2000 and XP and many other SMB/CIFS servers) and servers must support
+either "pure-TCP" (port 445 TCP/IP CIFS connections) or RFC 1001/1002 support for
+"Netbios-Over-TCP/IP."  Neither of these is likely to be a problem as most servers
+support this.  IPv6 support is planned for the future.
+
+Misc /proc/fs/cifs Flags and Debug Info
+=======================================
+Various experimental features and tracing can be enabled by changing flags in /proc/fs/cifs (after
+the cifs module has been installed or built into the kernel, e.g. insmod cifs).  To enable
+a feature you can set it to 1 e.g. to enable tracing to the kernel message log you can do
+"echo 1 > /proc/fs/cifs/cifsFYI" and "echo 1 > /proc/fs/cifs/traceSMB"
+Also note that "cat /proc/fs/cifs/DebugData" will display some information about the currently
+active sessions and the shares that are mounted. Currently the ntlmv2 enablement and packet
+signing will not work since they the implementation is not quite complete, so do not enable
+these flags unless you are doing specific testing.  Enabling extended security works to
+Windows 2000 Workstations and XP but not to Windows 2000 server or Samba since it does not
+usually send "raw NTLMSSP" (instead it sends NTLMSSP encapsulated in SPNEGO/GSSAPI, which
+support is not complete in the CIFS VFS yet).

fs/cifs/TODO

+version 0.5.3 October 8th, 2002
+
+A Partial List of Known Problems and Missing Features
+=====================================================
+
+Contributions are welcome.  There are plenty of opportunities
+for visible, important contributions to this module.  Here
+is a partial list of the known problems and missing features:
+
+a) Support for SecurityDescriptors for chmod/chgrp/chown
+
+b) Better pam/winbind integration
+
+c) multi-user mounts - multiplexed sessionsetups over single vc
+(ie tcp session) - prettying up needed
+
+d) Kerberos/SPNEGO session setup support - (started)
+
+e)NTLMv2 authentication and MD5-HMAC signing of SMB PDUs - (mostly implemented)
+
+f) oplock support (ie safe CIFS distributed file caching) is not complete.
+In addition Directory entry caching relies on a 1 second timer, rather than 
+using FindNotify or equivalent.  - (started)
+
+g) There may be a few additional changes that could be done to take advantage
+of recent 2.5 kernel improvements in byte-range locking
+
+h) quota support
+
+i) support for the Linux 2.5 kernel new feature get_xattr and set_xattr
+
+j) finish off the mount helper, mount.cifs - (started)
+
+k) support for memory mapped files only partially works until support for
+MS_INVALIDATE implemented.  readpage and writepage code not finished (started)
+
+KNOWN BUGS (updated October 8nd, 2002)
+====================================
+1) symbolic links (Windows reparse points) are recognized but
+can not be created remotely. They are implemented for Samba and those that
+support the CIFS Unix extensions but Samba has a bug currently handling
+symlink text beginning with slash
+2) delete of file with read-only attribute set will fail (may be ok)
+3) autoreconnection logic is only partially complete.
+
+Misc testing to do
+=================
+1) check out max path names and max path name components against various server
+types.
+
+2) Run POSIX bencharks against cifs
+
+3) Run dbench
+
+4) Finish FSX testing on SMP now that we workaround the Samba bug

fs/cifs/cifs_debug.h

+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2000,2002
+ *   Modified by Steve French (sfrench@us.ibm.com)
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program;  if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+*/
+#define CIFS_DEBUG		/* BB temporary */
+
+#ifndef _H_CIFS_DEBUG
+#define _H_CIFS_DEBUG
+
+void dump_mem(char *label, void *data, int length);
+extern int traceSMB;		/* flag which enables the function below */
+void dump_smb(struct smb_hdr *, int);
+
+/*
+ *	debug ON
+ *	--------
+ */
+#ifdef CIFS_DEBUG
+
+/* information message: e.g., configuration, major event */
+extern int cifsFYI;
+#define cFYI(button,prspec)\
+{ if (button && cifsFYI) printk prspec; }
+
+/* debug event message: */
+#define cEVENT(button,prspec)\
+{ if (button) printk prspec; }
+
+/* error event message: e.g., i/o error */
+extern int cifsERROR;
+#define cERROR(button, prspec)\
+{ if (button && cifsERROR) { printk prspec; if (button > 1) BUG(); } }
+
+/*
+ *	debug OFF
+ *	---------
+ */
+#else				/* _CIFS_DEBUG */
+#define cERROR(button,prspec)
+#define cEVENT(button,prspec)
+#define cFYI(button, prspec)
+#endif				/* _CIFS_DEBUG */
+
+/*
+ *	statistics
+ *	----------
+ */
+#ifdef	_CIFS_STATISTICS
+#define	INCREMENT(x)	((x)++)
+#define	DECREMENT(x)	((x)--)
+#define	HIGHWATERMARK(x,y)	x = MAX((x), (y))
+#else
+#define	INCREMENT(x)
+#define	DECREMENT(x)
+#define	HIGHWATERMARK(x,y)
+#endif				/* _CIFS_STATISTICS */
+
+#endif				/* _H_CIFS_DEBUG */

fs/cifs/cifs_fs_sb.h

+/*
+ *   fs/cifs/cifs_fs_sb.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ */
+#ifndef _CIFS_FS_SB_H
+#define _CIFS_FS_SB_H
+
+struct cifs_sb_info {
+	struct cifsTconInfo *tcon;	/* primary mount */
+	/* list of implicit mounts beneath this mount point - needed in dfs case */
+	struct list_head nested_tcon_q;
+	struct nls_table *local_nls;
+};
+#endif				/* _CIFS_FS_SB_H */

fs/cifs/cifs_unicode.c

+/*
+ *   fs/cifs/cifs_unicode.c
+ *
+ *   Copyright (c) International Business Machines  Corp., 2000,2002
+ *   Modified by Steve French (sfrench@us.ibm.com)
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or 
+ *   (at your option) any later version.
+ * 
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program;  if not, write to the Free Software 
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/fs.h>
+#include "cifs_unicode.h"
+#include "cifs_uniupr.h"
+#include "cifspdu.h"
+#include "cifs_debug.h"
+
+/*
+ * NAME:	toUpper()
+ *
+ * FUNCTION:	Upper case ASCII string (in place) using the current codepage
+ *
+ */
+
+void
+toUpper(const struct nls_table *n, char *mixed_string)
+{
+	int i;
+	char temp;
+
+	for (i = 0; i < strlen(mixed_string); i++) {
+		temp = mixed_string[i];
+		mixed_string[i] = n->charset2upper[(int) temp];
+	}
+}
+
+/*
+ * NAME:	cifs_strfromUCS()
+ *
+ * FUNCTION:	Convert little-endian unicode string to character string
+ *
+ */
+int
+cifs_strfromUCS_le(char *to, const wchar_t * from,	/* LITTLE ENDIAN */
+		   int len, const struct nls_table *codepage)
+{
+	int i;
+	int outlen = 0;
+
+	for (i = 0; (i < len) && from[i]; i++) {
+		int charlen;
+		/* 2.4.0 kernel or greater */
+		charlen =
+		    codepage->uni2char(le16_to_cpu(from[i]), &to[outlen],
+				       NLS_MAX_CHARSET_SIZE);
+		if (charlen > 0) {
+			outlen += charlen;
+		} else {
+			to[outlen++] = '?';
+		}
+	}
+	to[outlen] = 0;
+	cEVENT(0, ("cifs_strfromUCS returning %d - '%s'\n", outlen, to));
+	return outlen;
+}
+
+/*
+ * NAME:	cifs_strtoUCS()
+ *
+ * FUNCTION:	Convert character string to unicode string
+ *
+ */
+int
+cifs_strtoUCS(wchar_t * to, const char *from, int len,
+	      const struct nls_table *codepage)
+{
+	int charlen;
+	int i;
+
+	cEVENT(0, ("cifs_strtoUCS - '%s'\n", from));
+
+	for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
+
+		/* works for 2.4.0 kernel or later */
+		charlen = codepage->char2uni(from, len, &to[i]);
+		if (charlen < 1) {
+			cERROR(1,
+			       ("cifs_strtoUCS: char2uni returned %d.\n",
+				charlen));
+			to[i] = cpu_to_le16(0x003f);	/* a question mark */
+			charlen = 1;
+		}
+		to[i] = cpu_to_le16(to[i]);
+
+	}
+
+	cEVENT(0, (" returning %d\n", i));
+
+	to[i] = 0;
+	return i;
+}
+
+/*
+ * NAME:	get_UCSname2()
+ *
+ * FUNCTION:	Allocate and translate to unicode string
+ *
+ */
+/*int
+get_UCSname2(struct component_name *uniName, struct dentry *dentry,
+	    struct nls_table *nls_tab)
+{
+	int length = dentry->d_name.len;
+
+	if (length > 255)
+		return ENAMETOOLONG;
+
+	uniName->name = kmalloc((length + 1) * sizeof (wchar_t), GFP_KERNEL);
+
+	if (uniName->name == NULL)
+		return ENOSPC;
+
+	uniName->namlen = cifs_strtoUCS(uniName->name, dentry->d_name.name,
+					length, nls_tab);
+
+	return 0;
+} */

fs/cifs/cifs_unicode.h

+/*
+ * cifs_unicode:  Unicode kernel case support
+ *
+ * Function:
+ *     Convert a unicode character to upper or lower case using
+ *     compressed tables.
+ *
+ *   Copyright (c) International Business Machines  Corp., 2000,2002
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or 
+ *   (at your option) any later version.
+ * 
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program;  if not, write to the Free Software 
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *
+ * Notes:
+ *     These APIs are based on the C library functions.  The semantics
+ *     should match the C functions but with expanded size operands.
+ *
+ *     The upper/lower functions are based on a table created by mkupr.
+ *     This is a compressed table of upper and lower case conversion.
+ *
+ */
+
+#include <asm/byteorder.h>
+#include <linux/types.h>
+#include <linux/nls.h>
+
+#define  UNIUPR_NOLOWER		/* Example to not expand lower case tables */
+
+/* Just define what we want from uniupr.h.  We don't want to define the tables
+ * in each source file.
+ */
+#ifndef	UNICASERANGE_DEFINED
+struct UniCaseRange {
+	wchar_t start;
+	wchar_t end;
+	signed char *table;
+};
+#endif				/* UNICASERANGE_DEFINED */
+
+#ifndef UNIUPR_NOUPPER
+extern signed char CifsUniUpperTable[512];
+extern const struct UniCaseRange CifsUniUpperRange[];
+#endif				/* UNIUPR_NOUPPER */
+
+#ifndef UNIUPR_NOLOWER
+extern signed char UniLowerTable[512];
+extern struct UniCaseRange UniLowerRange[];
+#endif				/* UNIUPR_NOLOWER */
+
+/*
+ *      directory entry argument
+ */
+struct component_name {
+	int namlen;
+	wchar_t *name;
+};
+
+#ifdef __KERNEL__
+int cifs_strfromUCS_le(char *, const wchar_t *, int, const struct nls_table *);
+int cifs_strtoUCS(wchar_t *, const char *, int, const struct nls_table *);
+
+int cifs_UCSname(struct component_name *, struct dentry *,
+		 const struct nls_table *);
+
+void toUpper(const struct nls_table *, char *);
+#endif
+
+#define free_UCSname(COMP) kfree((COMP)->name)
+
+/*
+ * UniStrcat:  Concatenate the second string to the first
+ *
+ * Returns:
+ *     Address of the first string
+ */
+static inline wchar_t *
+UniStrcat(wchar_t * ucs1, const wchar_t * ucs2)
+{
+	wchar_t *anchor = ucs1;	/* save a pointer to start of ucs1 */
+
+	while (*ucs1++) ;	/* To end of first string */
+	ucs1--;			/* Return to the null */
+	while ((*ucs1++ = *ucs2++)) ;	/* copy string 2 over */
+	return anchor;
+}
+
+/*
+ * UniStrchr:  Find a character in a string
+ *
+ * Returns:
+ *     Address of first occurance of character in string
+ *     or NULL if the character is not in the string
+ */
+static inline wchar_t *
+UniStrchr(const wchar_t * ucs, wchar_t uc)
+{
+	while ((*ucs != uc) && *ucs)
+		ucs++;
+
+	if (*ucs == uc)
+		return (wchar_t *) ucs;
+	return NULL;
+}
+
+/*
+ * UniStrcmp:  Compare two strings
+ *
+ * Returns:
+ *     < 0:  First string is less than second
+ *     = 0:  Strings are equal
+ *     > 0:  First string is greater than second
+ */
+static inline int
+UniStrcmp(const wchar_t * ucs1, const wchar_t * ucs2)
+{
+	while ((*ucs1 == *ucs2) && *ucs1) {
+		ucs1++;
+		ucs2++;
+	}
+	return (int) *ucs1 - (int) *ucs2;
+}
+
+/*
+ * UniStrcpy:  Copy a string
+ */
+static inline wchar_t *
+UniStrcpy(wchar_t * ucs1, const wchar_t * ucs2)
+{
+	wchar_t *anchor = ucs1;	/* save the start of result string */
+
+	while ((*ucs1++ = *ucs2++)) ;
+	return anchor;
+}
+
+/*
+ * UniStrlen:  Return the length of a string (in 16 bit Unicode chars not bytes)
+ */
+static inline size_t
+UniStrlen(const wchar_t * ucs1)
+{
+	int i = 0;
+
+	while (*ucs1++)
+		i++;
+	return i;
+}
+
+/*
+ * UniStrnlen:  Return the length (in 16 bit Unicode chars not bytes) of a string (length limited)
+ */
+static inline size_t
+UniStrnlen(const wchar_t * ucs1, int maxlen)
+{
+	int i = 0;
+
+	while (*ucs1++) {
+		i++;
+		if (i >= maxlen)
+			break;
+	}
+	return i;
+}
+
+/*
+ * UniStrncat:  Concatenate length limited string
+ */
+static inline wchar_t *
+UniStrncat(wchar_t * ucs1, const wchar_t * ucs2, size_t n)
+{
+	wchar_t *anchor = ucs1;	/* save pointer to string 1 */
+
+	while (*ucs1++) ;
+	ucs1--;			/* point to null terminator of s1 */
+	while (n-- && (*ucs1 = *ucs2)) {	/* copy s2 after s1 */
+		ucs1++;
+		ucs2++;
+	}
+	*ucs1 = 0;		/* Null terminate the result */
+	return (anchor);
+}
+
+/*
+ * UniStrncmp:  Compare length limited string
+ */
+static inline int
+UniStrncmp(const wchar_t * ucs1, const wchar_t * ucs2, size_t n)
+{
+	if (!n)
+		return 0;	/* Null strings are equal */
+	while ((*ucs1 == *ucs2) && *ucs1 && --n) {
+		ucs1++;
+		ucs2++;
+	}
+	return (int) *ucs1 - (int) *ucs2;
+}
+
+/*
+ * UniStrncmp_le:  Compare length limited string - native to little-endian
+ */
+static inline int
+UniStrncmp_le(const wchar_t * ucs1, const wchar_t * ucs2, size_t n)
+{
+	if (!n)
+		return 0;	/* Null strings are equal */
+	while ((*ucs1 == __le16_to_cpu(*ucs2)) && *ucs1 && --n) {
+		ucs1++;
+		ucs2++;
+	}
+	return (int) *ucs1 - (int) __le16_to_cpu(*ucs2);
+}
+
+/*
+ * UniStrncpy:  Copy length limited string with pad
+ */
+static inline wchar_t *
+UniStrncpy(wchar_t * ucs1, const wchar_t * ucs2, size_t n)
+{
+	wchar_t *anchor = ucs1;
+
+	while (n-- && *ucs2)	/* Copy the strings */
+		*ucs1++ = *ucs2++;
+
+	n++;
+	while (n--)		/* Pad with nulls */
+		*ucs1++ = 0;
+	return anchor;
+}
+
+/*
+ * UniStrncpy_le:  Copy length limited string with pad to little-endian
+ */
+static inline wchar_t *
+UniStrncpy_le(wchar_t * ucs1, const wchar_t * ucs2, size_t n)
+{
+	wchar_t *anchor = ucs1;
+
+	while (n-- && *ucs2)	/* Copy the strings */
+		*ucs1++ = __le16_to_cpu(*ucs2++);
+
+	n++;
+	while (n--)		/* Pad with nulls */
+		*ucs1++ = 0;
+	return anchor;
+}
+
+/*
+ * UniStrstr:  Find a string in a string
+ *
+ * Returns:
+ *     Address of first match found
+ *     NULL if no matching string is found
+ */
+static inline wchar_t *
+UniStrstr(const wchar_t * ucs1, const wchar_t * ucs2)
+{
+	const wchar_t *anchor1 = ucs1;
+	const wchar_t *anchor2 = ucs2;
+
+	while (*ucs1) {
+		if (*ucs1 == *ucs2) {	/* Partial match found */
+			ucs1++;
+			ucs2++;
+		} else {
+			if (!*ucs2)	/* Match found */
+				return (wchar_t *) anchor1;
+			ucs1 = ++anchor1;	/* No match */
+			ucs2 = anchor2;
+		}
+	}
+
+	if (!*ucs2)		/* Both end together */
+		return (wchar_t *) anchor1;	/* Match found */
+	return NULL;		/* No match */
+}
+
+#ifndef UNIUPR_NOUPPER
+/*
+ * UniToupper:  Convert a unicode character to upper case
+ */
+static inline wchar_t
+UniToupper(register wchar_t uc)
+{
+	register const struct UniCaseRange *rp;
+
+	if (uc < sizeof (CifsUniUpperTable)) {	/* Latin characters */
+		return uc + CifsUniUpperTable[uc];	/* Use base tables */
+	} else {
+		rp = CifsUniUpperRange;	/* Use range tables */
+		while (rp->start) {
+			if (uc < rp->start)	/* Before start of range */
+				return uc;	/* Uppercase = input */
+			if (uc <= rp->end)	/* In range */
+				return uc + rp->table[uc - rp->start];
+			rp++;	/* Try next range */
+		}
+	}
+	return uc;		/* Past last range */
+}
+
+/*
+ * UniStrupr:  Upper case a unicode string
+ */
+static inline wchar_t *
+UniStrupr(register wchar_t * upin)
+{
+	register wchar_t *up;
+
+	up = upin;
+	while (*up) {		/* For all characters */
+		*up = UniToupper(*up);
+		up++;
+	}
+	return upin;		/* Return input pointer */
+}
+#endif				/* UNIUPR_NOUPPER */
+
+#ifndef UNIUPR_NOLOWER
+/*
+ * UniTolower:  Convert a unicode character to lower case
+ */
+static inline wchar_t
+UniTolower(wchar_t uc)
+{
+	register struct UniCaseRange *rp;
+
+	if (uc < sizeof (UniLowerTable)) {	/* Latin characters */
+		return uc + UniLowerTable[uc];	/* Use base tables */
+	} else {
+		rp = UniLowerRange;	/* Use range tables */
+		while (rp->start) {
+			if (uc < rp->start)	/* Before start of range */
+				return uc;	/* Uppercase = input */
+			if (uc <= rp->end)	/* In range */
+				return uc + rp->table[uc - rp->start];
+			rp++;	/* Try next range */
+		}
+	}
+	return uc;		/* Past last range */
+}
+
+/*
+ * UniStrlwr:  Lower case a unicode string
+ */
+static inline wchar_t *
+UniStrlwr(register wchar_t * upin)
+{
+	register wchar_t *up;
+
+	up = upin;
+	while (*up) {		/* For all characters */
+		*up = UniTolower(*up);
+		up++;
+	}
+	return upin;		/* Return input pointer */
+}
+
+#endif

fs/cifs/cifsfs.h

+/*
+ *   fs/cifs/cifsfs.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
+ */
+
+#ifndef _CIFSFS_H
+#define _CIFSFS_H
+
+#define ROOT_I 2
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+extern int map_cifs_error(int error_class, int error_code,
+			  int status_codes_negotiated);
+
+extern struct address_space_operations cifs_addr_ops;
+
+/* Functions related to super block operations */
+extern struct super_operations cifs_super_ops;
+extern void cifs_put_inode(struct inode *);
+extern void cifs_read_inode(struct inode *);
+extern void cifs_delete_inode(struct inode *);
+/* extern void cifs_write_inode(struct inode *); *//* BB not needed yet */
+
+/* Functions related to inodes */
+extern struct inode_operations cifs_dir_inode_ops;
+extern int cifs_create(struct inode *, struct dentry *, int);
+extern struct dentry *cifs_lookup(struct inode *, struct dentry *);
+extern int cifs_unlink(struct inode *, struct dentry *);
+extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
+extern int cifs_mkdir(struct inode *, struct dentry *, int);
+extern int cifs_rmdir(struct inode *, struct dentry *);
+extern int cifs_rename(struct inode *, struct dentry *, struct inode *,
+		       struct dentry *);
+extern int cifs_revalidate(struct dentry *);
+extern int cifs_setattr(struct dentry *, struct iattr *);
+
+extern struct inode_operations cifs_file_inode_ops;
+extern void cifs_truncate_file(struct inode *);
+
+extern struct inode_operations cifs_symlink_inode_ops;
+
+/* Functions related to files and directories */
+extern struct file_operations cifs_file_ops;
+extern int cifs_open(struct inode *inode, struct file *file);
+extern int cifs_close(struct inode *inode, struct file *file);
+extern int cifs_closedir(struct inode *inode, struct file *file);
+extern ssize_t cifs_read(struct file *file, char *read_data,
+			 size_t read_size, loff_t * poffset);
+extern ssize_t cifs_write(struct file *file, const char *write_data,
+			  size_t write_size, loff_t * poffset);
+extern int cifs_lock(struct file *, int, struct file_lock *);
+extern int cifs_fsync(struct file *, struct dentry *, int);
+
+extern struct file_operations cifs_dir_ops;
+extern int cifs_dir_open(struct inode *inode, struct file *file);
+extern int cifs_readdir(struct file *file, void *direntry, filldir_t filldir);
+
+/* Functions related to dir entries */
+extern struct dentry_operations cifs_dentry_ops;
+
+/* Functions related to symlinks */
+extern int cifs_follow_link(struct dentry *direntry, struct nameidata *nd);
+extern int cifs_readlink(struct dentry *direntry, char *buffer, int buflen);
+extern int cifs_symlink(struct inode *inode, struct dentry *direntry,
+			const char *symname);
+
+#endif				/* _CIFSSMB_H */