patch-2.1.66 linux/include/linux/zftape.h

• Lines: 88
• Date: Tue Nov 25 14:45:28 1997
• Orig file: v2.1.65/linux/include/linux/zftape.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.65/linux/include/linux/zftape.h linux/include/linux/zftape.h
@@ -0,0 +1,87 @@
+#ifndef _ZFTAPE_H
+#define _ZFTAPE_H
+
+/*
+ * Copyright (C) 1996, 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/include/linux/zftape.h,v $
+ * $Revision: 1.12 $
+ * $Date: 1997/10/21 11:02:37 $
+ *
+ *      Special ioctl and other global info for the zftape VFS
+ *      interface for the QIC-40/80/3010/3020 floppy-tape driver for
+ *      Linux.
+ */
+
+#define ZFTAPE_VERSION  "zftape for " FTAPE_VERSION
+
+#include <linux/ftape.h>
+
+#define ZFTAPE_LABEL       "Ftape - The Linux Floppy Tape Project!"
+
+/* Bits of the minor device number that control the operation mode */
+#define ZFT_Q80_MODE		(1 << 3)
+#define ZFT_ZIP_MODE		(1 << 4)
+#define ZFT_RAW_MODE		(1 << 5)
+#define ZFT_MINOR_OP_MASK	(ZFT_Q80_MODE	| 	\
+				 ZFT_ZIP_MODE	| 	\
+				 ZFT_RAW_MODE)
+#define ZFT_MINOR_MASK		(FTAPE_SEL_MASK		|	\
+				 ZFT_MINOR_OP_MASK	|	\
+				 FTAPE_NO_REWIND)
+
+#ifdef ZFT_OBSOLETE
+struct mtblksz {
+	unsigned int mt_blksz;
+};
+#define MTIOC_ZFTAPE_GETBLKSZ _IOR('m', 104, struct mtblksz)
+#endif
+
+#ifdef __KERNEL__
+
+extern int zft_init(void);
+
+extern inline __s64 zft_div_blksz(__s64 value, __u32 blk_sz)
+{
+	if (blk_sz == 1) {
+		return value;
+	} else {
+		return (__s64)(((__u32)(value >> 10) + (blk_sz >> 10) - 1) 
+			       / (blk_sz >> 10));
+	} 
+}
+
+extern inline __s64 zft_mul_blksz(__s64 value, __u32 blk_sz)
+{
+	if (blk_sz == 1) {
+		return value;
+	} else {
+		/*  if blk_sz != 1, then it is a multiple of 1024. In
+		 *  this case, `value' will also fit into 32 bits.
+		 * 
+		 *  Actually, this limits the capacity to 42
+		 *  bits. This is (2^32)*1024, roughly a thousand
+		 *  times 2GB, or 3 Terabytes. Hopefully this is enough
+		 */
+		return(__s64)(((__u32)(value)*(blk_sz>>10))<<10);
+	}
+}
+
+#endif
+
+#endif