Import 2.1.66

CREDITS

@@ -1609,11 +1609,12 @@ S: 1098 VA Amsterdam
 S: The Netherlands
 
 N: Tim Waugh
-E: tmw20@cyberelk.demon.co.uk
+E: tim@cyberelk.demon.co.uk
 D: Co-architect of the parallel-port sharing system
-S: 51 Frensham Road
-S: Southsea
-S: Hampshire, UK. PO4 8AE
+S: 12 Station Road
+S: Park Gate
+S: Southampton SO31 7GJ
+S: United Kingdom
 
 N: Juergen Weigert
 E: jnweiger@immd4.informatik.uni-erlangen.de

Documentation/00-INDEX

@@ -36,6 +36,8 @@ ez.txt
 	- documentation for the SyQuest parallel port EZ drive support.
 filesystems/
 	- directory with info on the various filesystems that Linux supports.
+ftape.txt
+	- notes about the floppy tape device driver
 ide.txt
 	- important info for users of ATA devices (IDE/EIDE disks and CD-ROMS)
 initrd.txt

Documentation/devices.tex

@@ -797,14 +797,30 @@ major number 3).
 
 \begin{devicelist}
 \major{27}{}{char }{QIC-117 tape}
-	\minor{0}{/dev/rft0}{Unit 0, rewind-on-close}
-	\minor{1}{/dev/rft1}{Unit 1, rewind-on-close}
-	\minor{2}{/dev/rft2}{Unit 2, rewind-on-close}
-	\minor{3}{/dev/rft3}{Unit 3, rewind-on-close}
-	\minor{4}{/dev/nrft0}{Unit 0, no rewind-on-close}
-	\minor{5}{/dev/nrft1}{Unit 1, no rewind-on-close}
-	\minor{6}{/dev/nrft2}{Unit 2, no rewind-on-close}
-	\minor{7}{/dev/nrft3}{Unit 3, no rewind-on-close}
+        \minor{0}{/dev/qft0}{Unit 0, rewind-on-close}
+        \minor{1}{/dev/qft1}{Unit 1, rewind-on-close}
+        \minor{2}{/dev/qft2}{Unit 2, rewind-on-close}
+        \minor{3}{/dev/qft3}{Unit 3, rewind-on-close}
+        \minor{4}{/dev/nqft0}{Unit 0, no rewind-on-close}
+        \minor{5}{/dev/nqft1}{Unit 1, no rewind-on-close}
+        \minor{6}{/dev/nqft2}{Unit 2, no rewind-on-close}
+        \minor{7}{/dev/nqft3}{Unit 3, no rewind-on-close}
+        \minor{16}{/dev/zqft0}{Unit 0, rewind-on-close, compression}
+        \minor{17}{/dev/zqft1}{Unit 1, rewind-on-close, compression}
+        \minor{18}{/dev/zqft2}{Unit 2, rewind-on-close, compression}
+        \minor{19}{/dev/zqft3}{Unit 3, rewind-on-close, compression}
+        \minor{20}{/dev/nzqft0}{Unit 0, no-rewind-on-close, compression}
+        \minor{21}{/dev/nzqft1}{Unit 1, no-rewind-on-close, compression}
+        \minor{22}{/dev/nzqft2}{Unit 2, no-rewind-on-close, compression}
+        \minor{23}{/dev/nzqft3}{Unit 3, no-rewind-on-close, compression}
+        \minor{32}{/dev/rawft0}{Unit 0, rewind-on-close, no file marks}
+        \minor{33}{/dev/rawft1}{Unit 1, rewind-on-close, no file marks}
+        \minor{34}{/dev/rawft2}{Unit 2, rewind-on-close, no file marks}
+        \minor{35}{/dev/rawft3}{Unit 3, rewind-on-close, no file marks}
+        \minor{36}{/dev/zqft0}{Unit 0, no-rewind-on-close, no file marks}
+        \minor{37}{/dev/zqft1}{Unit 1, no-rewind-on-close, no file marks}
+        \minor{38}{/dev/zqft2}{Unit 2, no-rewind-on-close, no file marks}
+        \minor{39}{/dev/zqft3}{Unit 3, no-rewind-on-close, no file marks}
 \\
 \major{  }{}{block}{Third Matsushita (Panasonic/SoundBlaster) CD-ROM}
 	\minor{0}{/dev/sbpcd8}{Panasonic CD-ROM controller 2 unit 0}
@@ -1613,6 +1629,7 @@ It is recommended that these links exist on all systems:
 \begin{nodelist}
 \link{/dev/core}{/proc/kcore}{symbolic}{Backward compatibility}
 \link{/dev/ramdisk}{ram0}{symbolic}{Backward compatibility}
+\link{/dev/rft0}{qft0}{symbolic}{Backward compatibility}
 \link{/dev/ftape}{rft0}{symbolic}{Backward compatibility}
 \link{/dev/scd?}{sr?}{hard}{Alternate name for CD-ROMs}
 \link{/dev/fd?D*}{fd?u*}{hard}{Backward compatibility}

Documentation/devices.txt

@@ -507,14 +507,30 @@ Your cooperation is appreciated.
 		  3 = /dev/sbpcd7	Panasonic CD-ROM controller 1 unit 3
 
  27 char	QIC-117 tape
-		  0 = /dev/rft0		Unit 0, rewind-on-close
-		  1 = /dev/rft1		Unit 1, rewind-on-close
-		  2 = /dev/rft2		Unit 2, rewind-on-close
-		  3 = /dev/rft3		Unit 3, rewind-on-close
-		  4 = /dev/nrft0	Unit 0, no rewind-on-close
-		  5 = /dev/nrft1	Unit 1, no rewind-on-close
-		  6 = /dev/nrft2	Unit 2, no rewind-on-close
-		  7 = /dev/nrft3	Unit 3, no rewind-on-close
+		  0 = /dev/qft0		Unit 0, rewind-on-close
+		  1 = /dev/qft1		Unit 1, rewind-on-close
+		  2 = /dev/qft2		Unit 2, rewind-on-close
+		  3 = /dev/qft3		Unit 3, rewind-on-close
+		  4 = /dev/nqft0	Unit 0, no rewind-on-close
+		  5 = /dev/nqft1	Unit 1, no rewind-on-close
+		  6 = /dev/nqft2	Unit 2, no rewind-on-close
+		  7 = /dev/nqft3	Unit 3, no rewind-on-close
+		  16 = /dev/zqft0	Unit 0, rewind-on-close, compression
+		  17 = /dev/zqft1	Unit 1, rewind-on-close, compression
+		  18 = /dev/zqft2	Unit 2, rewind-on-close, compression
+		  19 = /dev/zqft3	Unit 3, rewind-on-close, compression
+		  20 = /dev/nzqft0	Unit 0, no-rewind, compression
+		  21 = /dev/nzqft1	Unit 1, no-rewind, compression
+		  22 = /dev/nzqft2	Unit 2, no-rewind, compression
+		  23 = /dev/nzqft3	Unit 3, no-rewind, compression
+		  32 = /dev/rawft0	Unit 0, rewind-on-close, no file marks
+		  33 = /dev/rawft1	Unit 1, rewind-on-close, no file marks
+		  34 = /dev/rawft2	Unit 2, rewind-on-close, no file marks
+		  35 = /dev/rawft3	Unit 3, rewind-on-close, no file marks
+		  36 = /dev/zqft0	Unit 0, no-rewind, no file marks
+		  37 = /dev/zqft1	Unit 1, no-rewind, no file marks
+		  38 = /dev/zqft2	Unit 2, no-rewind, no file marks
+		  39 = /dev/zqft3	Unit 3, no-rewind, no file marks
     block	Third Matsushita (Panasonic/SoundBlaster) CD-ROM
 		  0 = /dev/sbpcd8	Panasonic CD-ROM controller 2 unit 0
 		  1 = /dev/sbpcd9	Panasonic CD-ROM controller 2 unit 1
@@ -1137,7 +1153,8 @@ It is recommended that these links exist on all systems:
 
 /dev/core	/proc/kcore	symbolic	Backward compatibility
 /dev/ramdisk	ram0		symbolic	Backward compatibility
-/dev/ftape	rft0		symbolic	Backward compatibility
+/dev/rft0	qft0		symbolic	Backward compatibility
+/dev/ftape	qft0		symbolic	Backward compatibility
 /dev/scd?	sr?		hard		Alternate SCSI CD-ROM name
 
 

Documentation/filesystems/smbfs.txt

-smbfs is a filesystem which understands the SMB protocol. This is the
-protocol Windows for Workgroups, Windows NT or Lan Manager use to talk
-to each other. smbfs was inspired by samba, the program written by
-Andrew Tridgell that turns any unix host into a file server for DOS or
-Windows clients.  See ftp://nimbus.anu.edu.au/pub/tridge/samba/ for
-this interesting program suite and lots of more information on SMB and
-NetBIOS over TCP/IP. There you also find explanation for concepts like
-netbios name or share.
-
-To use smbfs, you need a special mount program, which can be found in
-the smbfs package, found on
-
-	ftp://ftp.gwdg.de/pub/linux/misc/smbfs/
+Smbfs is a filesystem that implements the SMB protocol, which is the
+protocol used by Windows for Workgroups, Windows 95 and Windows NT.
+Smbfs was inspired by samba, the program written by Andrew Tridgell
+that turns any unix host into a file server for DOS or Windows clients.
+See ftp://nimbus.anu.edu.au/pub/tridge/samba/ for this interesting
+program suite and much more information on SMB, NetBIOS over TCP/IP,
+and explanations for concepts like netbios name or share.
+
+To use smbfs, you need to install the Samba package (Samba-1.9.17p1 or
+later), and you need the special mount program from the smbfs package
+(smbfs-2.1.0 or later), found on
+
+	ftp://ftp.gwdg.de/pub/linux/misc/smbfs/dontuse
+
+After downloading the smbfs package, apply the patch to the smbclient
+program and recompile.  Smbfs can then be mounted from the smbclient
+command line, as for example:
+
+	smb: \>mount /mnt/tmp -f 755
+
+For convenience, you may wish to package the command in a script like this:
+
+#!/bin/sh
+echo "mount /mnt/tmp -f 755" | smbclient //server/c$ -U administrator%
+
+Mount-Time Options
+Windows 95 has several bugs that affect SMB operations, and smbfs includes
+work-arounds for all of the bugs found (so far, at least.) These can be
+enabled at compile-time with the CONFIG_SMB_WIN95 kernel option.
+
+Unfortunately, some of the Win 95 work-arounds interact with Win NT bugs,
+so if you're using several different types of servers on your network you
+probably want to enable the work-arounds at mount time. To do this, answer
+`N' to the CONFIG_SMB_WIN95 option, and add the needed options listed below
+to the file mode argument of the mount command for the Win 95 servers.
+
+Option                  Value  Effect
+Identify Win 95 Server    1    Enables bug fixes
+Use Core Attributes       2    Speeds up directory scans, only mtime
+
+To apply the options, sum the values and prepend it to the file mode. For
+example, to use both options with file mode 755, you would prepend 3 to 755:
+
+	cnt>mount /mnt/tmp -f 3755
+
+Smbfs will print a message at mount time confirming the selected options.
+Note that _only_ Windows 95 servers require special treatment; using the
+"core attributes" option with Win NT will give trash timestamp values.
+
+To summarize, if your network includes both Win 95 and NT servers:
+(1) Do _not_ enable the CONFIG_SMB_WIN95 kernel option
+
+(2) Add the desired work-around options to the mount command for your
+    Win 95 server(s).

MAINTAINERS

@@ -239,6 +239,7 @@ FTAPE/QIC-117:
 P:	Claus-Justus Heine
 M:	claus@momo.math.rwth-aachen.de
 L:	linux-tape@vger.rutgers.edu
+W:	http://www-math.math.rwth-aachen.de/~LBFM/claus/ftape/
 S:	Maintained
 
 IPX NETWORK LAYER

Makefile

 VERSION = 2
 PATCHLEVEL = 1
-SUBLEVEL = 65
+SUBLEVEL = 66
 
 ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/)
 

arch/alpha/lib/strrchr.S

@@ -21,7 +21,7 @@ strrchr:
 	zapnot	a1, 1, a1	# e0    : zero extend our test character
 	mov	zero, t6	# .. e1 : t6 is last match aligned addr
 	sll	a1, 8, t5	# e0    : replicate our test character
-	mov	zero, t7	# .. e1 : t7 is last match byte compare mask
+	mov	zero, t8	# .. e1 : t8 is last match byte compare mask
 	or	t5, a1, a1	# e0    :
 	ldq_u   t0, 0(a0)	# .. e1 : load first quadword
 	sll	a1, 16, t5	# e0    :
@@ -43,7 +43,7 @@ strrchr:
 $loop:
 	ldq	t0, 8(v0)	# e0    : load next quadword
 	cmovne	t3, v0, t6	# .. e1 : save previous comparisons match
-	cmovne	t3, t3, t7	# e0    :
+	cmovne	t3, t3, t8	# e0    :
 	addq	v0, 8, v0	# .. e1 :
 	xor	t0, a1, t2	# e0    :
 	cmpbge	zero, t0, t1	# .. e1 : bits set iff byte == zero
@@ -58,22 +58,22 @@ $eos:
 	or	t4, t5, t4	# e1    : ... and including the null
 
 	and	t3, t4, t3	# e0    : mask out char matches after null
-	cmovne	t3, t3, t7	# .. e1 : save it, if match found
+	cmovne	t3, t3, t8	# .. e1 : save it, if match found
 	cmovne	t3, v0, t6	# e0    :
 
 	/* Locate the address of the last matched character */
 
 	/* Retain the early exit for the ev4 -- the ev5 mispredict penalty
 	   is 5 cycles -- the same as just falling through.  */
-	beq	t7, $retnull	# .. e1 :
+	beq	t8, $retnull	# .. e1 :
 
-	and	t7, 0xf0, t2	# e0    : binary search for the high bit set
-	cmovne	t2, t2, t7	# .. e1 (zdb)
+	and	t8, 0xf0, t2	# e0    : binary search for the high bit set
+	cmovne	t2, t2, t8	# .. e1 (zdb)
 	cmovne	t2, 4, t2	# e0    :
-	and	t7, 0xcc, t1	# .. e1 :
-	cmovne	t1, t1, t7	# e0    :
+	and	t8, 0xcc, t1	# .. e1 :
+	cmovne	t1, t1, t8	# e0    :
 	cmovne	t1, 2, t1	# .. e1 :
-	and	t7, 0xaa, t0	# e0    :
+	and	t8, 0xaa, t0	# e0    :
 	cmovne	t0, 1, t0	# .. e1 (zdb)
 	addq	t2, t1, t1	# e0    :
 	addq	t6, t0, v0	# .. e1 : add our aligned base ptr to the mix

arch/i386/defconfig

@@ -211,7 +211,7 @@ CONFIG_ISO9660_FS=y
 CONFIG_PROC_FS=y
 CONFIG_NFS_FS=y
 # CONFIG_ROOT_NFS is not set
-# CONFIG_NFSD is not set
+CONFIG_NFSD=y
 CONFIG_SUNRPC=y
 CONFIG_LOCKD=y
 # CONFIG_SMB_FS is not set
@@ -245,7 +245,6 @@ CONFIG_82C710_MOUSE=y
 # CONFIG_PC110_PAD is not set
 # CONFIG_UMISC is not set
 # CONFIG_QIC02_TAPE is not set
-# CONFIG_FTAPE is not set
 # CONFIG_APM is not set
 # CONFIG_WATCHDOG is not set
 # CONFIG_RTC is not set
@@ -253,6 +252,11 @@ CONFIG_82C710_MOUSE=y
 # CONFIG_JOYSTICK is not set
 # CONFIG_MISC_RADIO is not set
 
+#
+# Ftape, the floppy tape device driver
+#
+# CONFIG_FTAPE is not set
+
 #
 # Sound
 #

arch/i386/kernel/entry.S

@@ -349,10 +349,6 @@ ENTRY(page_fault)
 	pushl $ SYMBOL_NAME(do_page_fault)
 	jmp error_code
 
-ENTRY(page_fault_f00f)
-	pushl $ SYMBOL_NAME(do_page_fault_f00f)
-	jmp error_code
-
 ENTRY(spurious_interrupt_bug)
 	pushl $0
 	pushl $ SYMBOL_NAME(do_spurious_interrupt_bug)

arch/i386/kernel/traps.c

@@ -103,7 +103,6 @@ asmlinkage void segment_not_present(void);
 asmlinkage void stack_segment(void);
 asmlinkage void general_protection(void);
 asmlinkage void page_fault(void);
-asmlinkage void page_fault_f00f(void);
 asmlinkage void coprocessor_error(void);
 asmlinkage void reserved(void);
 asmlinkage void alignment_check(void);
@@ -417,14 +416,9 @@ asmlinkage void math_emulate(long arg)
 __initfunc(void trap_init_f00f_bug(void))
 {
 	unsigned long page;
-
-	/*
-	 * We use a special page fault handler, to actually detect
-	 * 'bounced' traps/exceptions #0-6. This new page fault
-	 * handler is a few tens of cycles slower than the 'normal'
-	 * one.
-	 */
-	set_trap_gate(14,&page_fault_f00f);
+	pgd_t * pgd;
+	pmd_t * pmd;
+	pte_t * pte;
 
 	/*
 	 * Allocate a new page in virtual address space, 
@@ -433,16 +427,21 @@ __initfunc(void trap_init_f00f_bug(void))
 	 * fault for IDT entries #0-#6..
 	 */
 	page = (unsigned long) vmalloc(PAGE_SIZE);
-	memcpy((void *) page, idt_table + 7, (256-7)*8);
+	memcpy((void *) page, idt_table, 256*8);
+
+	pgd = pgd_offset(&init_mm, page);
+	pmd = pmd_offset(pgd, page);
+	pte = pte_offset(pmd, page);
+	*pte = pte_wrprotect(*pte);
+	local_flush_tlb();
 
 	/*
 	 * "idt" is magic - it overlaps the idt_descr
 	 * variable so that updating idt will automatically
 	 * update the idt descriptor..
 	 */
-	idt = (struct desc_struct *)(page - 7*8);
+	idt = (struct desc_struct *)page;
 	__asm__ __volatile__("lidt %0": "=m" (idt_descr));
-
 }
 
 

arch/i386/mm/fault.c

@@ -74,6 +74,9 @@ int __verify_write(const void * addr, unsigned long size)
 	return 0;
 }
 
+asmlinkage void do_invalid_op (struct pt_regs *, unsigned long);
+
+extern int pentium_f00f_bug;
 
 /*
  * This routine handles page faults.  It determines the address,
@@ -85,16 +88,19 @@ int __verify_write(const void * addr, unsigned long size)
  *	bit 1 == 0 means read, 1 means write
  *	bit 2 == 0 means kernel, 1 means user-mode
  */
-static void __do_page_fault(struct pt_regs *regs, unsigned long error_code,
-				unsigned long address)
+asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code)
 {
 	struct task_struct *tsk;
 	struct mm_struct *mm;
 	struct vm_area_struct * vma;
+	unsigned long address;
 	unsigned long page;
 	unsigned long fixup;
 	int write;
 
+	/* get the address */
+	__asm__("movl %%cr2,%0":"=r" (address));
+
 	lock_kernel();
 	tsk = current;
 	mm = tsk->mm;
@@ -171,6 +177,21 @@ static void __do_page_fault(struct pt_regs *regs, unsigned long error_code,
 		goto out;
 	}
 
+	/*
+	 * Pentium F0 0F C7 C8 bug workaround.
+	 */
+	if (pentium_f00f_bug) {
+		unsigned long nr;
+		
+		nr = (address - (unsigned long) idt) >> 3;
+
+		if (nr == 6) {
+			unlock_kernel();
+			do_invalid_op(regs, 0);
+			return;
+		}
+	}
+
 	/* Are we prepared to handle this kernel fault?  */
 	if ((fixup = search_exception_table(regs->eip)) != 0) {
 		printk(KERN_DEBUG "%s: Exception at [<%lx>] cr2=%lx (fixup: %lx)\n",
@@ -216,65 +237,3 @@ static void __do_page_fault(struct pt_regs *regs, unsigned long error_code,
 out:
 	unlock_kernel();
 }
-
-
-/*
- * One of these two functions is the real page fault handler, which one depends
- * on wether the CPU has the F00F bug:
- */
-
-asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code)
-{
-	unsigned long address;
-
-	/* get the address */
-	__asm__("movl %%cr2,%0":"=r" (address));
-
-	__do_page_fault(regs, error_code, address);
-}
-
-asmlinkage void do_divide_error (struct pt_regs *, unsigned long);
-asmlinkage void do_debug (struct pt_regs *, unsigned long);
-asmlinkage void do_nmi (struct pt_regs *, unsigned long);
-asmlinkage void do_int3 (struct pt_regs *, unsigned long);
-asmlinkage void do_overflow (struct pt_regs *, unsigned long);
-asmlinkage void do_bounds (struct pt_regs *, unsigned long);
-asmlinkage void do_invalid_op (struct pt_regs *, unsigned long);
-
-extern int pentium_f00f_bug;
-
-asmlinkage void do_page_fault_f00f(struct pt_regs *regs, unsigned long error_code)
-{
-	unsigned long address;
-
-	/* get the address */
-	__asm__("movl %%cr2,%0":"=r" (address));
-
-	/*
-	 * Pentium F0 0F C7 C8 bug workaround. Do this first,
-	 * to make sure we don't have locking problems with
-	 * asynchronous traps (ie NMI). 
-	 */
-	if ( !(error_code & 5) && pentium_f00f_bug ) {
-		unsigned long nr;
-		
-		nr = (address - (unsigned long) idt) >> 3;
-
-		if (nr < 7) {
-			static void (*handler[])(struct pt_regs *, unsigned long) = {
-				do_divide_error,	/* 0 - divide overflow */
-				do_debug,		/* 1 - debug trap */
-				do_nmi,			/* 2 - NMI */
-				do_int3,		/* 3 - int 3 */
-				do_overflow,		/* 4 - overflow */
-				do_bounds,		/* 5 - bound range */
-				do_invalid_op };	/* 6 - invalid opcode */
-			if (nr == 3 || nr == 4) regs->eip++;
-			handler[nr](regs, 0);
-			return;
-		}
-	}
-	__do_page_fault(regs, error_code, address);
-}
-
-

drivers/block/floppy.c

@@ -4016,11 +4016,6 @@ __initfunc(int floppy_init(void))
 			continue;
 		}
 
-		request_region(FDCS->address, 6, "floppy");
-		request_region(FDCS->address+7, 1, "floppy DIR");
-		/* address + 6 is reserved, and may be taken by IDE.
-		 * Unfortunately, Adaptec doesn't know this :-(, */
-
 		have_no_fdc = 0;
 		/* Not all FDCs seem to be able to handle the version command
 		 * properly, so force a reset for the standard FDC clones,
@@ -4042,7 +4037,6 @@ __initfunc(int floppy_init(void))
 
 static int floppy_grab_irq_and_dma(void)
 {
-	int i;
 	unsigned long flags;
 
 	INT_OFF;
@@ -4052,16 +4046,6 @@ static int floppy_grab_irq_and_dma(void)
 	}
 	INT_ON;
 	MOD_INC_USE_COUNT;
-	for (i=0; i< N_FDC; i++){
-		if (fdc_state[i].address != -1){
-			fdc = i;
-			reset_fdc_info(1);
-			fd_outb(FDCS->dor, FD_DOR);
-		}
-	}
-	fdc = 0;
-	set_dor(0, ~0, 8);  /* avoid immediate interrupt */
-
 	if (fd_request_irq()) {
 		DPRINT("Unable to grab IRQ%d for the floppy driver\n",
 			FLOPPY_IRQ);
@@ -4077,6 +4061,36 @@ static int floppy_grab_irq_and_dma(void)
 		usage_count--;
 		return -1;
 	}
+	for (fdc=0; fdc< N_FDC; fdc++){
+		if (FDCS->address != -1){
+			if (check_region(FDCS->address, 6) < 0 ||
+			    check_region(FDCS->address+7, 1) < 0) {
+				DPRINT("Floppy io-port 0x%04x in use\n", FDCS->address);
+				fd_free_irq();
+				fd_free_dma();
+				while(--fdc >= 0) {
+					release_region(FDCS->address, 6);
+					release_region(FDCS->address+7, 1);
+				}
+				MOD_DEC_USE_COUNT;
+				usage_count--;
+				return -1;
+			}
+			request_region(FDCS->address, 6, "floppy");
+			request_region(FDCS->address+7, 1, "floppy DIR");
+			/* address + 6 is reserved, and may be taken by IDE.
+			 * Unfortunately, Adaptec doesn't know this :-(, */
+		}
+	}
+	for (fdc=0; fdc< N_FDC; fdc++){
+		if (FDCS->address != -1){
+			reset_fdc_info(1);
+			fd_outb(FDCS->dor, FD_DOR);
+		}
+	}
+	fdc = 0;
+	set_dor(0, ~0, 8);  /* avoid immediate interrupt */
+
 	for (fdc = 0; fdc < N_FDC; fdc++)
 		if (FDCS->address != -1)
 			fd_outb(FDCS->dor, FD_DOR);
@@ -4087,6 +4101,7 @@ static int floppy_grab_irq_and_dma(void)
 
 static void floppy_release_irq_and_dma(void)
 {
+	int old_fdc;
 #ifdef FLOPPY_SANITY_CHECK
 #ifndef __sparc__
 	int drive;
@@ -4136,6 +4151,13 @@ static void floppy_release_irq_and_dma(void)
 	if (floppy_tq.sync)
 		printk("task queue still active\n");
 #endif
+	old_fdc = fdc;
+	for (fdc = 0; fdc < N_FDC; fdc++)
+		if (FDCS->address != -1) {
+			release_region(FDCS->address, 6);
+			release_region(FDCS->address+7, 1);
+		}
+	fdc = old_fdc;
 	MOD_DEC_USE_COUNT;
 }
 
@@ -4224,12 +4246,6 @@ void cleanup_module(void)
 {
 	int fdc, dummy;
 		
-	for (fdc=0; fdc<2; fdc++)
-		if (FDCS->address != -1){
-			release_region(FDCS->address, 6);
-			release_region(FDCS->address+7, 1);
-	}
-		
 	unregister_blkdev(MAJOR_NR, "fd");
 
 	blk_dev[MAJOR_NR].request_fn = 0;

drivers/block/md.c

@@ -541,6 +541,9 @@ static int do_md_add (int minor, kdev_t dev)
 	if (md_dev[minor].nb_dev==MAX_REAL)
 		return -EINVAL;
 
+	if (!fs_may_mount (dev))
+		return -EBUSY;
+
 	if (blk_size[MAJOR(dev)] == NULL || blk_size[MAJOR(dev)][MINOR(dev)] == 0) {
 		printk("md_add(): zero device size, huh, bailing out.\n");
 		return -EINVAL;

drivers/char/ChangeLog

+Mon Nov 24 10:37:49 1997  Theodore Ts'o  <tytso@rsts-11.mit.edu>
+
+	* serial.c, esp.c, rocket.c: Change drivers to take advantage of
+	 	tty_get_baud_rate().
+	
+	* tty_io.c (tty_get_baud_rate): New function which computes the
+		correct baud rate for the tty.  More factoring out of
+		common code out of the serial driver to the high-level tty
+		functions....
+
+Sat Nov 22 07:53:36 1997  Theodore Ts'o  <tytso@rsts-11.mit.edu>
+
+	* serial.c, esp.c, rocket.c: Add tty->driver.break() routine, and
+ 		allow high-level tty code to handle the break and soft
+ 		carrier ioctls.
+	
+	* tty_ioctl.c (n_tty_ioctl): Support TIOCGSOFTCAR and
+ 		TIOCSSOFTCAR, so that device drivers don't have to support
+ 		it.
+
+	* serial.c (autoconfig): Change 16750 test to hopefully eliminate
+		false results by people with strange 16550A's being
+		detected as 16750's.  Hopefully 16750's will still be
+		detected as 16750, and other wierd UART's won't get poorly
+		autodetected.  If this doesn't work, I'll have to disable
+		the auto identification for the 16750....
+
+	* tty_io.c (tty_hangup): Now do actually do the tty hangup
+		processing during the timer processing, and disable
+		interrupts while doing the hangup processing.  This avoids
+		several nasty race conditions which happened when the
+		hangup processing was done asynchronously.
+		(tty_ioctl): Do break handling in the tty driver if
+		driver's break function is supported.  
+		(tty_flip_buffer_push): New exported function which should
+		be used by drivers to push characters in the flip buffer
+		to the tty handler.  This may either be done using a task
+		queue function for better CPU efficiency, or directly for
+		low latency operation.
+
+	* serial.c (rs_set_termios): Fix bug rs_set_termios when
+		transitioning away from B0, submitted by Stanislav
+		Voronyi. 
+
 Thu Jun 19 20:05:58 1997  Theodore Ts'o  <tytso@rsts-11.mit.edu>
 
 	* serial.c (begin_break, end_break, rs_ioctl): Applied patch

drivers/char/Config.in

@@ -76,11 +76,6 @@ if [ "$CONFIG_QIC02_TAPE" != "n" ]; then
   fi
 fi
 
-tristate 'Ftape (QIC-80/Travan) support' CONFIG_FTAPE
-if [ "$CONFIG_FTAPE" != "n" ]; then
-  comment 'Set IObase/IRQ/DMA for ftape in ./drivers/char/ftape/Makefile'
-fi
-
 bool 'Advanced Power Management BIOS support' CONFIG_APM
 if [ "$CONFIG_APM" = "y" ]; then
   bool '   Ignore USER SUSPEND' CONFIG_APM_IGNORE_USER_SUSPEND
@@ -116,4 +111,13 @@ if [ "$CONFIG_MISC_RADIO" != "n" ]; then
     hex '    RadioTrack i/o port (0x20f or 0x30f)' CONFIG_RADIO_RTRACK_PORT 0x20f
   fi
 fi
+
+mainmenu_option next_comment
+comment 'Ftape, the floppy tape device driver'
+tristate 'Ftape (QIC-80/Travan) support' CONFIG_FTAPE
+if [ "$CONFIG_FTAPE" != "n" ]; then
+  source drivers/char/ftape/Config.in
+fi
+endmenu
+
 endmenu

drivers/char/Makefile

@@ -297,8 +297,11 @@ else
 endif
 
 ifeq ($(CONFIG_FTAPE),y)
-SUB_DIRS += ftape
 L_OBJS       += ftape/ftape.o
+SUB_DIRS     += ftape
+ifneq ($(CONFIG_ZFTAPE),n)
+MOD_SUB_DIRS += ftape
+endif
 else
   ifeq ($(CONFIG_FTAPE),m)
   MOD_SUB_DIRS += ftape

drivers/char/esp.c

@@ -47,6 +47,7 @@
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
 #include <linux/serial.h>
+#include <linux/serialP.h>
 #include <linux/serial_reg.h>
 #include <linux/major.h>
 #include <linux/string.h>
@@ -140,11 +141,8 @@ static void change_speed(struct esp_struct *info);
 static void rs_wait_until_sent(struct tty_struct *, int);
 	
 /*
- * This assumes you have a 1.8432 MHz clock for your UART.
- *
- * It'd be nice if someone built a serial card with a 24.576 MHz
- * clock, since the 16550A is capable of handling a top speed of 1.5
- * megabits/second; but this requires the faster clock.
+ * The ESP card has a clock rate of 14.7456 MHz (that is, 2**ESPC_SCALE
+ * times the normal 1.8432 Mhz clock of most serial boards).
  */
 #define BASE_BAUD ((1843200 / 16) * (1 << ESPC_SCALE))
 
@@ -192,15 +190,6 @@ static inline int serial_paranoia_check(struct esp_struct *info,
 	return 0;
 }
 
-/*
- * This is used to figure out the divisor speeds
- */
-static int quot_table[] = {
-/*      0,    50,    75,  110,  134,  150,  200,  300, 600, 1200, */
-	0, 18432, 12288, 8378, 6878, 6144, 4608, 3072, 1536, 768,
-/*     1800,2400,4800,9600,19200,38400,57600,115200,230400,460800 */
-	512, 384, 192,  96,   48,   24,   16,     8,     4,     2, 0 };
-
 static inline unsigned int serial_in(struct esp_struct *info, int offset)
 {
 	return inb(info->port + offset);
@@ -1096,7 +1085,7 @@ static void change_speed(struct esp_struct *info)
 	unsigned short port;
 	int	quot = 0;
 	unsigned cflag,cval;
-	int	i, bits;
+	int	baud, bits;
 	unsigned char flow1 = 0, flow2 = 0;
 	unsigned long flags;
 
@@ -1104,26 +1093,6 @@ static void change_speed(struct esp_struct *info)
 		return;
 	cflag = info->tty->termios->c_cflag;
 	port = info->port;
-	i = cflag & CBAUD;
-	if (i & CBAUDEX) {
-		i &= ~CBAUDEX;
-		if (i < 1 || i > 2) 
-			info->tty->termios->c_cflag &= ~CBAUDEX;
-		else
-			i += 15;
-	}
-	if (i == 15) {
-		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
-			i += 1;
-		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
-			i += 2;
-                if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
-                        i += 3;
-                if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
-                        i += 4;
-		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
-			quot = info->custom_divisor;
-	}
 	
 	/* byte size and parity */
 	switch (cflag & CSIZE) {
@@ -1148,13 +1117,19 @@ static void change_speed(struct esp_struct *info)
 		cval |= UART_LCR_SPAR;
 #endif
 
-	if (!quot) {
-		quot = quot_table[i];
-
-		/* default to 9600 bps */
+	baud = tty_get_baud_rate(info->tty);
+	if (baud == 38400)
+		quot = info->custom_divisor;
+	else {
+		if (baud == 134)
+			/* Special case since 134 is really 134.5 */
+			quot = (2*BASE_BAUD / 269);
+		else if (baud)
+			quot = BASE_BAUD / baud;
+	}
+	/* If the quotient is ever zero, default to 9600 bps */
 	if (!quot)
 		quot = BASE_BAUD / 9600;
-	}
 	
 	info->timeout = ((1024 * HZ * bits * quot) / BASE_BAUD) + (HZ / 50);
 
@@ -1632,8 +1607,17 @@ static int set_serial_info(struct esp_struct * info,
 		if (((old_info.flags & ASYNC_SPD_MASK) !=
 		     (info->flags & ASYNC_SPD_MASK)) ||
 		    (old_info.custom_divisor != info->custom_divisor) ||
-		    change_flow)
+		    change_flow) {
+			if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+				info->tty->alt_speed = 57600;
+			if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+				info->tty->alt_speed = 115200;
+			if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+				info->tty->alt_speed = 230400;
+			if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+				info->tty->alt_speed = 460800;
 			change_speed(info);
+		}
 	} else
 		retval = startup(info);
 	return retval;
@@ -1723,30 +1707,27 @@ static int set_modem_info(struct esp_struct * info, unsigned int cmd,
 }
 
 /*
- * This routine sends a break character out the serial port.
+ * rs_break() --- routine which turns the break handling on or off
  */
-static void send_break(	struct esp_struct * info, int duration)
+static void esp_break(struct tty_struct *tty, int break_state)
 {
-	cli();
+	struct esp_struct * info = (struct esp_struct *)tty->driver_data;
+	unsigned long flags;
+	
+	if (serial_paranoia_check(info, tty->device, "esp_break"))
+		return;
+
+	save_flags(flags); cli();
+	if (break_state == -1) {
 		serial_out(info, UART_ESI_CMD1, ESI_ISSUE_BREAK);
 		serial_out(info, UART_ESI_CMD2, 0x01);
 
 		interruptible_sleep_on(&info->break_wait);
-
-	if (signal_pending(current)) {
+	} else {
 		serial_out(info, UART_ESI_CMD1, ESI_ISSUE_BREAK);
 		serial_out(info, UART_ESI_CMD2, 0x00);
-		sti();
-		return;
 	}
-
-	current->state = TASK_INTERRUPTIBLE;
-	current->timeout = jiffies + duration;
-	schedule();
-
-	serial_out(info, UART_ESI_CMD1, ESI_ISSUE_BREAK);
-	serial_out(info, UART_ESI_CMD2, 0x00);
-	sti();
+	restore_flags(flags);
 }
 
 static int rs_ioctl(struct tty_struct *tty, struct file * file,
@@ -1754,7 +1735,6 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
 {
 	int error;
 	struct esp_struct * info = (struct esp_struct *)tty->driver_data;
-	int retval;
 	struct async_icount cprev, cnow;	/* kernel counter temps */
 	struct serial_icounter_struct *p_cuser;	/* user space */
 
@@ -1770,41 +1750,6 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
 	}
 	
 	switch (cmd) {
-		case TCSBRK:	/* SVID version: non-zero arg --> no break */
-			retval = tty_check_change(tty);
-			if (retval)
-				return retval;
-			tty_wait_until_sent(tty, 0);
-			if (signal_pending(current))
-				return -EINTR;
-			if (!arg) {
-				send_break(info, HZ/4);	/* 1/4 second */
-				if (signal_pending(current))
-					return -EINTR;
-			}
-			return 0;
-		case TCSBRKP:	/* support for POSIX tcsendbreak() */
-			retval = tty_check_change(tty);
-			if (retval)
-				return retval;
-			tty_wait_until_sent(tty, 0);
-			if (signal_pending(current))
-				return -EINTR;
-			send_break(info, arg ? arg*(HZ/10) : HZ/4);
-			if (signal_pending(current))
-				return -EINTR;
-			return 0;
-		case TIOCGSOFTCAR:
-			return put_user(C_CLOCAL(tty) ? 1 : 0,
-				    (int *) arg);
-		case TIOCSSOFTCAR:
-			error = get_user(arg, (unsigned int *)arg);
-			if (error)
-				return error;
-			tty->termios->c_cflag =
-				((tty->termios->c_cflag & ~CLOCAL) |
-				 (arg ? CLOCAL : 0));
-			return 0;
 		case TIOCMGET:
 			return get_modem_info(info, (unsigned int *) arg);
 		case TIOCMBIS:
@@ -2527,6 +2472,7 @@ __initfunc(int espserial_init(void))
 	esp_driver.stop = rs_stop;
 	esp_driver.start = rs_start;
 	esp_driver.hangup = esp_hangup;
+	esp_driver.break_ctl = esp_break;
 	esp_driver.wait_until_sent = rs_wait_until_sent;
 
 	/*

drivers/char/ftape/Config.in

+#
+# Ftape configuration
+#
+dep_tristate 'Zftape, the VFS interface' CONFIG_ZFTAPE $CONFIG_FTAPE
+if [ "$CONFIG_ZFTAPE" != "n" ]; then
+  int 'Default block size' CONFIG_ZFT_DFLT_BLK_SZ 10240
+  comment 'The compressor will be built as a module only!'
+  define_bool CONFIG_ZFT_COMPRESSOR m
+fi
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+  int 'Number of ftape buffers (EXPERIMENTAL)' CONFIG_FT_NR_BUFFERS 3
+fi
+if [ "$CONFIG_PROC_FS" = "y" ]; then
+  bool 'Enable procfs status report (+2kb)' CONFIG_FT_PROC_FS y
+fi
+choice 'Debugging output'			\
+	"Normal		CONFIG_FT_NORMAL_DEBUG	\
+	 Excessive	CONFIG_FT_FULL_DEBUG	\
+	 Reduced	CONFIG_FT_NO_TRACE	\
+	 None		CONIFG_FT_NO_TRACE_AT_ALL" Normal
+comment 'Hardware configuration'
+choice 'Floppy tape controllers'				\
+	"Standard			CONFIG_FT_STD_FDC	\
+	 MACH-2				CONFIG_FT_MACH2		\
+	 FC-10/FC-20			CONFIG_FT_PROBE_FC10	\
+	 Alt/82078			CONFIG_FT_ALT_FDC" Standard
+if [ "$CONFIG_FT_STD_FDC" != "y" ]; then
+  comment '   Consult the manuals of your tape drive for the correct settings!'
+  hex ' IO base of the floppy disk controller' CONFIG_FT_FDC_BASE 0
+  int '   IRQ channel of the floppy disk controller' CONFIG_FT_FDC_IRQ 0
+  int '   DMA channel of the floppy disk controller' CONFIG_FT_FDC_DMA 0
+fi
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+   int 'Default FIFO threshold (EXPERIMENTAL)' CONFIG_FT_FDC_THR 8
+   int 'Maximal data rate to use (EXPERIMENTAL)' CONFIG_FT_FDC_MAX_RATE 2000
+fi
+comment 'ONLY for DEC Alpha architectures'
+int 'CPU clock frequency of your DEC Alpha' CONFIG_FT_ALPHA_CLOCK 0

drivers/char/ftape/Makefile

 #
-# Makefile for the ftape device driver.
+#       Copyright (C) 1997 Claus Heine.
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
+# 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, or (at your option)
+# any later version.
 # 
-# Note 2! The CFLAGS definitions are now inherited from the
-# parent makes..
+# 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.
 # 
-
-#  Valid ftape options are:
-#       NO_TRACE        - if defined, only information and errors show up.
-#       NO_TRACE_AT_ALL - if defined, no trace output shows up.
-#       GCC_2_4_5_BUG   - must be set if using gcc-2.4.5 to prevent
-#                         bad assembler-code for the dma handling.
-#	NR_BUFFERS	- Number of ftape DMA buffers (keep it at 3!)
-#       VERIFY_HEADERS  - if set the headers segments are verified after
-#                         being written.
-#       PROBE_FC10      - if defined will look for a FC-10 card at specified
-#                         settings (FDC_BASE,FDC_IRQ,FDC_DMA) before using
-#                         the standard fd controller.
-#       FDC_BASE        - sets base address (only!) if using non-standard fdc
-#       FDC_IRQ         - sets interrupt if FDC_BASE is defined
-#       FDC_DMA         - sets dma channel if FDC_BASE is defined
-#       MACH2           - Support for Mountain MACH-2 controller at either 1E0
-#                         or 3E0, don't forget the FDC_OPT's !
-#	CLK_48MHZ	- Set to 1. If you have a i82078-1 FDC and it does not
-#			  work, try setting it to 0. (only used for i82078-1's)
-#	FDC_82078SL	- If you have a 82078SL, define this.
-
-FTAPE_OPT       = -DVERIFY_HEADERS -DNR_BUFFERS=3 -DCLK_48MHZ=1 \
-	-DNO_TRACE -DFDC_82078SL
-
-#  If you're using a non-standard floppy disk controller for the
-#  tape drive, enable one (only!) of the following lines and set
-#  the FDC_BASE, FDC_IRQ and FDC_DMA parameters to the actual values.
-#
-#  Note1: A FC-10/FC-20 controller must use either of DMA 1, 2, or 3.
-#         DMA 5 and 7 does NOT work!.
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 #
-#  Note2: IRQ 2 and IRQ 9 can be considered the same. When using IRQ 2
-#         on a controller you must specify IRQ 9 here!
+# $Source: /homes/cvs/ftape-stacked/ftape/Makefile,v $
+# $Revision: 1.4 $
+# $Date: 1997/10/05 19:17:56 $
 #
-# For a Mountain MACH-2 controller, try 
-#FDC_OPT         = -DMACH2 -DFDC_BASE=0x1E0 -DFDC_IRQ=6 -DFDC_DMA=2
+#      Makefile for the QIC-40/80/3010/3020 floppy-tape driver for
+#      Linux.
 #
-# For Colorado CMS FC-10 or FC-20 controllers:
-#FDC_OPT         = -DPROBE_FC10 -DFDC_BASE=0x180 -DFDC_IRQ=9 -DFDC_DMA=3
+
 #
-# Secondary floppy disk controller:
-#FDC_OPT         = -DFDC_BASE=0x370 -DFDC_IRQ=9 -DFDC_DMA=3
+#  This isn't used inside the kernel, only for my private development
+#  version
 #
-# This enables some (most?) 2Mbps controllers:
-#FDC_OPT         = -DFDC_BASE=0x3E0 -DFDC_IRQ=6 -DFDC_DMA=2
+ifndef TOPDIR
+TOPDIR= ..
+include $(TOPDIR)/MCONFIG
+endif
+
+SUB_DIRS     := 
+MOD_SUB_DIRS := $(SUB_DIRS)
+ALL_SUB_DIRS := $(SUB_DIRS) lowlevel zftape compressor
+
+ifeq ($(CONFIG_FTAPE),y)
+  O_TARGET := ftape.o
+  SUB_DIRS += lowlevel
+  O_OBJS   += lowlevel/ftape.o
+else
+  ifeq ($(CONFIG_FTAPE),m)
+  MOD_SUB_DIRS += lowlevel
+  endif
+endif
 
-EXTRA_CFLAGS := $(FTAPE_OPT) $(FDC_OPT)
+ifeq ($(CONFIG_ZFTAPE),y)
+  SUB_DIRS += zftape
+  O_OBJS   += zftape/zftape.o
+else
+  ifeq ($(CONFIG_ZFTAPE),m)
+  MOD_SUB_DIRS += zftape
+  endif
+endif
 
-O_TARGET := ftape.o
-O_OBJS   = kernel-interface.o tracing.o fdc-io.o fdc-isr.o \
-	   ftape-bsm.o ftape-ctl.o ftape-eof.o ftape-read.o ftape-rw.o \
-	   ftape-write.o ftape-io.o calibr.o ecc.o fc-10.o
-M_OBJS   = $(O_TARGET)
+ifeq ($(CONFIG_ZFT_COMPRESSOR),y)
+  SUB_DIRS += compressor
+  O_OBJS   += compressor/zft-compressor.o
+else
+  ifeq ($(CONFIG_ZFT_COMPRESSOR),m)
+  MOD_SUB_DIRS += compressor
+  endif
+endif
 
 include $(TOPDIR)/Rules.make

drivers/char/ftape/README.PCI

@@ -30,7 +30,7 @@ bus timing.
 I judge this a hardware problem and not a limitation of ftape ;-)
 My DOS backup software seems to be suffering from the same problems
 and even refuses to run at 1 Mbps !
-Ftape will reduce the datarate from 1 Mbps to 500 Kbps if the number
+Ftape will reduce the data-rate from 1 Mbps to 500 Kbps if the number
 of overrun errors on a track exceeds a threshold.
 
 
@@ -77,3 +77,5 @@ under DOS. If it's very slow and often repositions you're
 probably having this problem.
 
                         --//--
+ LocalWords:  ftape PCI bios GAT ISA DMA chipset Mbps Kbps FDC isa AF ok ASUS
+ LocalWords:  SP linebuffer masterbuffer XPS http www com

drivers/char/ftape/compressor/Makefile

+#
+#       Copyright (C) 1997 Claus-Justus Heine.
+#
+# 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, 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; see the file COPYING.  If not, write to
+# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+# $Source: /homes/cvs/ftape-stacked/ftape/compressor/Makefile,v $
+# $Revision: 1.1 $
+# $Date: 1997/10/05 19:12:28 $
+#
+#      Makefile for the optional compressor for th zftape VFS
+#      interface to the QIC-40/80/3010/3020 floppy-tape driver for
+#      Linux.
+#
+
+#
+#  This isn't used inside the kernel, only for my private development
+#  version
+#
+ifndef TOPDIR
+TOPDIR=../..
+include $(TOPDIR)/MCONFIG
+endif
+
+O_TARGET := zft-compressor.o
+O_OBJS    = zftape-compress.o lzrw3.o
+
+M_OBJS    = $(O_TARGET)
+
+include $(TOPDIR)/Rules.make
+
+#
+# sorry, a special rule. 
+#
+lzrw3.o: lzrw3.c
+	$(CC) $(CFLAGS) -O6 -funroll-all-loops -c $<
+

drivers/char/ftape/compressor/zftape-compress.h

+#ifndef _ZFTAPE_COMPRESS_H
+#define _ZFTAPE_COMPRESS_H
+/*
+ *      Copyright (c) 1994-1997 Claus-Justus Heine
+
+ 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, 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; see the file COPYING.  If not, write to
+ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
+ USA.
+
+ *
+ * $Source: /homes/cvs/ftape-stacked/ftape/compressor/zftape-compress.h,v $
+ * $Revision: 1.1 $
+ * $Date: 1997/10/05 19:12:32 $
+ *
+ * This file contains macros and definitions for zftape's
+ * builtin compression code.
+ *
+ */
+
+#include "../zftape/zftape-buffers.h"
+#include "../zftape/zftape-vtbl.h"
+#include "../compressor/lzrw3.h"
+
+/* CMPR_WRK_MEM_SIZE gives the size of the compression wrk_mem */
+/* I got these out of lzrw3.c */
+#define U(X)            ((__u32) X)
+#define SIZE_P_BYTE     (U(sizeof(__u8 *)))
+#define ALIGNMENT_FUDGE (U(16))
+
+#define CMPR_WRK_MEM_SIZE (U(4096)*(SIZE_P_BYTE) + ALIGNMENT_FUDGE)
+
+/* the maximum number of bytes the size of the "compressed" data can
+ * exceed the uncompressed data. As it is quite useless to compress
+ * data twice it is sometimes the case that it is more efficient to
+ * copy a block of data but to feed it to the "compression"
+ * algorithm. In this case there are some flag bytes or the like
+ * proceding the "compressed" data.  THAT MUST NOT BE THE CASE for the
+ * algorithm we use for this driver. Instead, the high bit 15 of
+ * compressed_size:
+ *
+ * compressed_size = ftape_compress()
+ *
+ * must be set in such a case.
+ *
+ * Nevertheless, it might also be as for lzrw3 that there is an
+ * "intermediate" overrun that exceeds the amount of the compressed
+ * data that is actually produced. During the algorithm we need in the
+ * worst case MAX_CMP_GROUP bytes more than the input-size.
+ */
+#define MAX_CMP_GROUP (2+16*2) /* from lzrw3.c */
+
+#define CMPR_OVERRUN      MAX_CMP_GROUP /* during compression */
+
+/****************************************************/
+
+#define     CMPR_BUFFER_SIZE (MAX_BLOCK_SIZE + CMPR_OVERRUN)
+
+/* the compression map stores the byte offset compressed blocks within
+ * the current volume for catridges with format code 2,3 and 5
+ * (and old versions of zftape) and the offset measured in kilobytes for
+ * format code 4 and 6. This gives us a possible max. size of a 
+ * compressed volume of 1024*4GIG which should be enough.
+ */
+typedef __u32 CmprMap;
+
+/* globals 
+ */
+
+/* exported functions
+ */
+
+#endif /* _ZFTAPE_COMPRESS_H */

drivers/char/ftape/lowlevel/Makefile

+#
+#       Copyright (C) 1996, 1997 Clau-Justus Heine.
+#
+# 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, 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; see the file COPYING.  If not, write to
+# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+# $Source: /homes/cvs/ftape-stacked/ftape/lowlevel/Makefile,v $
+# $Revision: 1.4 $
+# $Date: 1997/10/07 09:26:02 $
+#
+#      Makefile for the lowlevel part QIC-40/80/3010/3020 floppy-tape
+#      driver for Linux.
+#
+
+#
+#  This isn't used inside the kernel, only for my private development
+#  version
+#
+ifndef TOPDIR
+TOPDIR=../..
+include $(TOPDIR)/MCONFIG
+endif
+
+O_TARGET := ftape.o
+O_OBJS    = ftape-init.o fdc-io.o fdc-isr.o \
+	    ftape-bsm.o ftape-ctl.o ftape-read.o ftape-rw.o \
+	    ftape-write.o ftape-io.o ftape-calibr.o ftape-ecc.o fc-10.o \
+	    ftape-buffer.o ftape-format.o
+
+ifeq ($(CONFIG_FTAPE),y)
+O_OBJS   += ftape-setup.o
+endif
+
+ifndef CONFIG_FT_NO_TRACE_AT_ALL
+O_OBJS   += ftape-tracing.o
+endif
+
+ifeq ($(CONFIG_PROC_FS),y)
+ifeq ($(CONFIG_FT_PROC_FS),y)
+O_OBJS += ftape-proc.o
+endif
+endif
+
+OX_OBJS = ftape_syms.o
+
+M_OBJS  = $(O_TARGET)
+
+include $(TOPDIR)/Rules.make
+