zftape.h
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- #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);
- static 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));
- }
- }
- static 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