diff options
Diffstat (limited to 'drivers/char/ftape/zftape/zftape-vtbl.h')
| -rw-r--r-- | drivers/char/ftape/zftape/zftape-vtbl.h | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/drivers/char/ftape/zftape/zftape-vtbl.h b/drivers/char/ftape/zftape/zftape-vtbl.h deleted file mode 100644 index f31d196d17594e..00000000000000 --- a/drivers/char/ftape/zftape/zftape-vtbl.h +++ /dev/null @@ -1,227 +0,0 @@ -#ifndef _ZFTAPE_VTBL_H -#define _ZFTAPE_VTBL_H - -/* - * Copyright (c) 1995-1997 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/zftape/zftape-vtbl.h,v $ - * $Revision: 1.3 $ - * $Date: 1997/10/28 14:30:09 $ - * - * This file defines a volume table as defined in the QIC-80 - * development standards. - */ - -#include <linux/list.h> - -#include "../lowlevel/ftape-tracing.h" - -#include "../zftape/zftape-eof.h" -#include "../zftape/zftape-ctl.h" -#include "../zftape/zftape-rw.h" - -#define VTBL_SIZE 128 /* bytes */ - -/* The following are offsets in the vtbl. */ -#define VTBL_SIG 0 -#define VTBL_START 4 -#define VTBL_END 6 -#define VTBL_DESC 8 -#define VTBL_DATE 52 -#define VTBL_FLAGS 56 -#define VTBL_FL_VENDOR_SPECIFIC (1<<0) -#define VTBL_FL_MUTLI_CARTRIDGE (1<<1) -#define VTBL_FL_NOT_VERIFIED (1<<2) -#define VTBL_FL_REDIR_INHIBIT (1<<3) -#define VTBL_FL_SEG_SPANNING (1<<4) -#define VTBL_FL_DIRECTORY_LAST (1<<5) -#define VTBL_FL_RESERVED_6 (1<<6) -#define VTBL_FL_RESERVED_7 (1<<7) -#define VTBL_M_NO 57 -#define VTBL_EXT 58 -#define EXT_ZFTAPE_SIG 0 -#define EXT_ZFTAPE_BLKSZ 10 -#define EXT_ZFTAPE_CMAP 12 -#define EXT_ZFTAPE_QIC113 13 -#define VTBL_PWD 84 -#define VTBL_DIR_SIZE 92 -#define VTBL_DATA_SIZE 96 -#define VTBL_OS_VERSION 104 -#define VTBL_SRC_DRIVE 106 -#define VTBL_DEV 122 -#define VTBL_RESERVED_1 123 -#define VTBL_CMPR 124 -#define VTBL_CMPR_UNREG 0x3f -#define VTBL_CMPR_USED 0x80 -#define VTBL_FMT 125 -#define VTBL_RESERVED_2 126 -#define VTBL_RESERVED_3 127 -/* compatibility with pre revision K */ -#define VTBL_K_CMPR 120 - -/* the next is used by QIC-3020 tapes with format code 6 (>2^16 - * segments) It is specified in QIC-113, Rev. G, Section 5 (SCSI - * volume table). The difference is simply, that we only store the - * number of segments used, not the starting segment. - */ -#define VTBL_SCSI_SEGS 4 /* is a 4 byte value */ - -/* one vtbl is 128 bytes, that results in a maximum number of - * 29*1024/128 = 232 volumes. - */ -#define ZFT_MAX_VOLUMES (FT_SEGMENT_SIZE/VTBL_SIZE) -#define VTBL_ID "VTBL" -#define VTBL_IDS { VTBL_ID, "XTBL", "UTID", "EXVT" } /* other valid ids */ -#define ZFT_VOL_NAME "zftape volume" /* volume label used by me */ -#define ZFTAPE_SIG "LINUX ZFT" - -/* global variables - */ -typedef struct zft_internal_vtbl -{ - struct list_head node; - int count; - unsigned int start_seg; /* 32 bits are enough for now */ - unsigned int end_seg; /* 32 bits are enough for now */ - __s64 size; /* uncompressed size */ - unsigned int blk_sz; /* block size for this volume */ - unsigned int zft_volume :1; /* zftape created this volume */ - unsigned int use_compression:1; /* compressed volume */ - unsigned int qic113 :1; /* layout of compressed block - * info and vtbl conforms to - * QIC-113, Rev. G - */ - unsigned int new_volume :1; /* it was created by us, this - * run. this allows the - * fields that aren't really - * used by zftape to be filled - * in by some user level - * program. - */ - unsigned int open :1; /* just in progress of being - * written - */ -} zft_volinfo; - -extern struct list_head zft_vtbl; -#define zft_head_vtbl list_entry(zft_vtbl.next, zft_volinfo, node) -#define zft_eom_vtbl list_entry(zft_vtbl.prev, zft_volinfo, node) -#define zft_last_vtbl list_entry(zft_eom_vtbl->node.prev, zft_volinfo, node) -#define zft_first_vtbl list_entry(zft_head_vtbl->node.next, zft_volinfo, node) -#define zft_vtbl_empty (zft_eom_vtbl->node.prev == &zft_head_vtbl->node) - -#define DUMP_VOLINFO(level, desc, info) \ -{ \ - char tmp[21]; \ - strlcpy(tmp, desc, sizeof(tmp)); \ - TRACE(level, "Volume %d:\n" \ - KERN_INFO "description : %s\n" \ - KERN_INFO "first segment: %d\n" \ - KERN_INFO "last segment: %d\n" \ - KERN_INFO "size : " LL_X "\n" \ - KERN_INFO "block size : %d\n" \ - KERN_INFO "compression : %d\n" \ - KERN_INFO "zftape volume: %d\n" \ - KERN_INFO "QIC-113 conf.: %d", \ - (info)->count, tmp, (info)->start_seg, (info)->end_seg, \ - LL((info)->size), (info)->blk_sz, \ - (info)->use_compression != 0, (info)->zft_volume != 0, \ - (info)->qic113 != 0); \ -} - -extern int zft_qic_mode; -extern int zft_old_ftape; -extern int zft_volume_table_changed; - -/* exported functions */ -extern void zft_init_vtbl (void); -extern void zft_free_vtbl (void); -extern int zft_extract_volume_headers(__u8 *buffer); -extern int zft_update_volume_table (unsigned int segment); -extern int zft_open_volume (zft_position *pos, - int blk_sz, int use_compression); -extern int zft_close_volume (zft_position *pos); -extern const zft_volinfo *zft_find_volume(unsigned int seg_pos); -extern int zft_skip_volumes (int count, zft_position *pos); -extern __s64 zft_get_eom_pos (void); -extern void zft_skip_to_eom (zft_position *pos); -extern int zft_fake_volume_headers (eof_mark_union *eof_map, - int num_failed_sectors); -extern int zft_weof (unsigned int count, zft_position *pos); -extern void zft_move_past_eof (zft_position *pos); - -static inline int zft_tape_at_eod (const zft_position *pos); -static inline int zft_tape_at_lbot (const zft_position *pos); -static inline void zft_position_before_eof (zft_position *pos, - const zft_volinfo *volume); -static inline __s64 zft_check_for_eof(const zft_volinfo *vtbl, - const zft_position *pos); - -/* this function decrements the zft_seg_pos counter if we are right - * at the beginning of a segment. This is to handle fsfm/bsfm -- we - * need to position before the eof mark. NOTE: zft_tape_pos is not - * changed - */ -static inline void zft_position_before_eof(zft_position *pos, - const zft_volinfo *volume) -{ - TRACE_FUN(ft_t_flow); - - if (pos->seg_pos == volume->end_seg + 1 && pos->seg_byte_pos == 0) { - pos->seg_pos --; - pos->seg_byte_pos = zft_get_seg_sz(pos->seg_pos); - } - TRACE_EXIT; -} - -/* Mmmh. Is the position at the end of the last volume, that is right - * before the last EOF mark also logical an EOD condition? - */ -static inline int zft_tape_at_eod(const zft_position *pos) -{ - TRACE_FUN(ft_t_any); - - if (zft_qic_mode) { - TRACE_EXIT (pos->seg_pos >= zft_eom_vtbl->start_seg || - zft_last_vtbl->open); - } else { - TRACE_EXIT pos->seg_pos > ft_last_data_segment; - } -} - -static inline int zft_tape_at_lbot(const zft_position *pos) -{ - if (zft_qic_mode) { - return (pos->seg_pos <= zft_first_vtbl->start_seg && - pos->volume_pos == 0); - } else { - return (pos->seg_pos <= ft_first_data_segment && - pos->volume_pos == 0); - } -} - -/* This one checks for EOF. return remaing space (may be negative) - */ -static inline __s64 zft_check_for_eof(const zft_volinfo *vtbl, - const zft_position *pos) -{ - return (__s64)(vtbl->size - pos->volume_pos); -} - -#endif /* _ZFTAPE_VTBL_H */ |