Remove long-unmaintained ftape driver subsystem.

It's bitrotten, long unmaintained, long hidden under BROKEN_ON_SMP,
etc.  As scheduled in feature-removal-schedule.txt, and ack'd several
times on lkml.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 0 insertions, 757 deletions

diff --git a/drivers/char/ftape/zftape/zftape-vtbl.c b/drivers/char/ftape/zftape/zftape-vtbl.c
deleted file mode 100644
index ad7f8be6340..00000000000
--- a/drivers/char/ftape/zftape/zftape-vtbl.c
+++ /dev/null
@@ -1,757 +0,0 @@
-/*
- *      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.c,v $
- * $Revision: 1.7.6.1 $
- * $Date: 1997/11/24 13:48:31 $
- *
- *      This file defines a volume table as defined in various QIC
- *      standards.
- * 
- *      This is a minimal implementation, just allowing ordinary DOS
- *      :( prgrams to identify the cartridge as used.
- */
-
-#include <linux/errno.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-
-#include <linux/zftape.h>
-#include "../zftape/zftape-init.h"
-#include "../zftape/zftape-eof.h"
-#include "../zftape/zftape-ctl.h"
-#include "../zftape/zftape-write.h"
-#include "../zftape/zftape-read.h"
-#include "../zftape/zftape-rw.h"
-#include "../zftape/zftape-vtbl.h"
-
-#define ZFT_CMAP_HACK /* leave this defined to hide the compression map */
-
-/*
- *  global variables 
- */
-int zft_qic_mode   = 1; /* use the vtbl */
-int zft_old_ftape; /* prevents old ftaped tapes to be overwritten */
-int zft_volume_table_changed; /* for write_header_segments() */
-
-/*
- *  private variables (only exported for inline functions)
- */
-LIST_HEAD(zft_vtbl);
-
-/*  We could also allocate these dynamically when extracting the volume table
- *  sizeof(zft_volinfo) is about 32 or something close to that
- */
-static zft_volinfo  tape_vtbl;
-static zft_volinfo  eot_vtbl;
-static zft_volinfo *cur_vtbl;
-
-static inline void zft_new_vtbl_entry(void)
-{
-	struct list_head *tmp = &zft_last_vtbl->node;
-	zft_volinfo *new = zft_kmalloc(sizeof(zft_volinfo));
-
-	list_add(&new->node, tmp);
-	new->count = zft_eom_vtbl->count ++;
-}
-
-void zft_free_vtbl(void)
-{
-	for (;;) {
-		struct list_head *tmp = zft_vtbl.prev;
-		zft_volinfo *vtbl;
-
-		if (tmp == &zft_vtbl)
-			break;
-		list_del(tmp);
-		vtbl = list_entry(tmp, zft_volinfo, node);
-		zft_kfree(vtbl, sizeof(zft_volinfo));
-	}
-	INIT_LIST_HEAD(&zft_vtbl);
-	cur_vtbl = NULL;
-}
-
-/*  initialize vtbl, called by ftape_new_cartridge()
- */
-void zft_init_vtbl(void)
-{ 
-	zft_volinfo *new;
-
-	zft_free_vtbl();
-	
-	/*  Create the two dummy vtbl entries
-	 */
-	new = zft_kmalloc(sizeof(zft_volinfo));
-	list_add(&new->node, &zft_vtbl);
-	new = zft_kmalloc(sizeof(zft_volinfo));
-	list_add(&new->node, &zft_vtbl);
-	zft_head_vtbl->end_seg   = ft_first_data_segment;
-	zft_head_vtbl->blk_sz    = zft_blk_sz;
-	zft_head_vtbl->count     = -1;
-	zft_eom_vtbl->start_seg  = ft_first_data_segment + 1;
-	zft_eom_vtbl->end_seg    = ft_last_data_segment + 1;
-	zft_eom_vtbl->blk_sz     = zft_blk_sz;
-	zft_eom_vtbl->count      = 0;
-
-	/*  Reset the pointer for zft_find_volume()
-	 */
-	cur_vtbl = zft_eom_vtbl;
-
-	/* initialize the dummy vtbl entries for zft_qic_mode == 0
-	 */
-	eot_vtbl.start_seg       = ft_last_data_segment + 1;
-	eot_vtbl.end_seg         = ft_last_data_segment + 1;
-	eot_vtbl.blk_sz          = zft_blk_sz;
-	eot_vtbl.count           = -1;
-	tape_vtbl.start_seg = ft_first_data_segment;
-	tape_vtbl.end_seg   = ft_last_data_segment;
-	tape_vtbl.blk_sz    = zft_blk_sz;
-	tape_vtbl.size      = zft_capacity;
-	tape_vtbl.count     = 0;
-}
-
-/* check for a valid VTBL signature. 
- */
-static int vtbl_signature_valid(__u8 signature[4])
-{
-	const char *vtbl_ids[] = VTBL_IDS; /* valid signatures */
-	int j;
-	
-	for (j = 0; 
-	     (j < NR_ITEMS(vtbl_ids)) && (memcmp(signature, vtbl_ids[j], 4) != 0);
-	     j++);
-	return j < NR_ITEMS(vtbl_ids);
-}
-
-/* We used to store the block-size of the volume in the volume-label,
- * using the keyword "blocksize". The blocksize written to the
- * volume-label is in bytes.
- *
- * We use this now only for compatibility with old zftape version. We
- * store the blocksize directly as binary number in the vendor
- * extension part of the volume entry.
- */
-static int check_volume_label(const char *label, int *blk_sz)
-{ 
-	int valid_format;
-	char *blocksize;
-	TRACE_FUN(ft_t_flow);
-	
-	TRACE(ft_t_noise, "called with \"%s\" / \"%s\"", label, ZFT_VOL_NAME);
-	if (strncmp(label, ZFT_VOL_NAME, strlen(ZFT_VOL_NAME)) != 0) {
-		*blk_sz = 1; /* smallest block size that we allow */
-		valid_format = 0;
-	} else {
-		TRACE(ft_t_noise, "got old style zftape vtbl entry");
-		/* get the default blocksize */
-		/* use the kernel strstr()   */
-		blocksize= strstr(label, " blocksize ");
-		if (blocksize) {
-			blocksize += strlen(" blocksize ");
-			for(*blk_sz= 0; 
-			    *blocksize >= '0' && *blocksize <= '9'; 
-			    blocksize++) {
-				*blk_sz *= 10;
-				*blk_sz += *blocksize - '0';
-			}
-			if (*blk_sz > ZFT_MAX_BLK_SZ) {
-				*blk_sz= 1;
-				valid_format= 0;
-			} else {
-				valid_format = 1;
-			}
-		} else {
-			*blk_sz= 1;
-			valid_format= 0;
-		}
-	}
-	TRACE_EXIT valid_format;
-}
-
-/*   check for a zftape volume
- */
-static int check_volume(__u8 *entry, zft_volinfo *volume)
-{
-	TRACE_FUN(ft_t_flow);
-	
-	if(strncmp(&entry[VTBL_EXT+EXT_ZFTAPE_SIG], ZFTAPE_SIG,
-		   strlen(ZFTAPE_SIG)) == 0) {
-		TRACE(ft_t_noise, "got new style zftape vtbl entry");
-		volume->blk_sz = GET2(entry, VTBL_EXT+EXT_ZFTAPE_BLKSZ);
-		volume->qic113 = entry[VTBL_EXT+EXT_ZFTAPE_QIC113];
-		TRACE_EXIT 1;
-	} else {
-		TRACE_EXIT check_volume_label(&entry[VTBL_DESC], &volume->blk_sz);
-	}
-}
-
-
-/* create zftape specific vtbl entry, the volume bounds are inserted
- * in the calling function, zft_create_volume_headers()
- */
-static void create_zft_volume(__u8 *entry, zft_volinfo *vtbl)
-{
-	TRACE_FUN(ft_t_flow);
-
-	memset(entry, 0, VTBL_SIZE);
-	memcpy(&entry[VTBL_SIG], VTBL_ID, 4);
-	sprintf(&entry[VTBL_DESC], ZFT_VOL_NAME" %03d", vtbl->count);
-	entry[VTBL_FLAGS] = (VTBL_FL_NOT_VERIFIED | VTBL_FL_SEG_SPANNING);
-	entry[VTBL_M_NO] = 1; /* multi_cartridge_count */
-	strcpy(&entry[VTBL_EXT+EXT_ZFTAPE_SIG], ZFTAPE_SIG);
-	PUT2(entry, VTBL_EXT+EXT_ZFTAPE_BLKSZ, vtbl->blk_sz);
-	if (zft_qic113) {
-		PUT8(entry, VTBL_DATA_SIZE, vtbl->size);
-		entry[VTBL_CMPR] = VTBL_CMPR_UNREG; 
-		if (vtbl->use_compression) { /* use compression: */
-			entry[VTBL_CMPR] |= VTBL_CMPR_USED;
-		}
-		entry[VTBL_EXT+EXT_ZFTAPE_QIC113] = 1;
-	} else {
-		PUT4(entry, VTBL_DATA_SIZE, vtbl->size);
-		entry[VTBL_K_CMPR] = VTBL_CMPR_UNREG; 
-		if (vtbl->use_compression) { /* use compression: */
-			entry[VTBL_K_CMPR] |= VTBL_CMPR_USED;
-		}
-	}
-	if (ft_format_code == fmt_big) {
-		/* SCSI like vtbl, store the number of used
-		 * segments as 4 byte value 
-		 */
-		PUT4(entry, VTBL_SCSI_SEGS, vtbl->end_seg-vtbl->start_seg + 1);
-	} else {
-		/* normal, QIC-80MC like vtbl 
-		 */
-		PUT2(entry, VTBL_START, vtbl->start_seg);
-		PUT2(entry, VTBL_END, vtbl->end_seg);
-	}
-	TRACE_EXIT;
-}
-
-/* this one creates the volume headers for each volume. It is assumed
- * that buffer already contains the old volume-table, so that vtbl
- * entries without the zft_volume flag set can savely be ignored.
- */
-static void zft_create_volume_headers(__u8 *buffer)
-{   
-	__u8 *entry;
-	struct list_head *tmp;
-	zft_volinfo *vtbl;
-	TRACE_FUN(ft_t_flow);
-	
-#ifdef ZFT_CMAP_HACK
-	if((strncmp(&buffer[VTBL_EXT+EXT_ZFTAPE_SIG], ZFTAPE_SIG,
-		    strlen(ZFTAPE_SIG)) == 0) && 
-	   buffer[VTBL_EXT+EXT_ZFTAPE_CMAP] != 0) {
-		TRACE(ft_t_noise, "deleting cmap volume");
-		memmove(buffer, buffer + VTBL_SIZE,
-			FT_SEGMENT_SIZE - VTBL_SIZE);
-	}
-#endif
-	entry = buffer;
-	for (tmp = zft_head_vtbl->node.next;
-	     tmp != &zft_eom_vtbl->node;
-	     tmp = tmp->next) {
-		vtbl = list_entry(tmp, zft_volinfo, node);
-		/* we now fill in the values only for newly created volumes.
-		 */
-		if (vtbl->new_volume) {
-			create_zft_volume(entry, vtbl);
-			vtbl->new_volume = 0; /* clear the flag */
-		}
-		
-		DUMP_VOLINFO(ft_t_noise, &entry[VTBL_DESC], vtbl);
-		entry += VTBL_SIZE;
-	}
-	memset(entry, 0, FT_SEGMENT_SIZE - zft_eom_vtbl->count * VTBL_SIZE);
-	TRACE_EXIT;
-}
-
-/*  write volume table to tape. Calls zft_create_volume_headers()
- */
-int zft_update_volume_table(unsigned int segment)
-{
-	int result = 0;
-	__u8 *verify_buf = NULL;
-	TRACE_FUN(ft_t_flow);
-
-	TRACE_CATCH(result = ftape_read_segment(ft_first_data_segment, 
-						zft_deblock_buf,
-						FT_RD_SINGLE),);
-	zft_create_volume_headers(zft_deblock_buf);
-	TRACE(ft_t_noise, "writing volume table segment %d", segment);
-	if (zft_vmalloc_once(&verify_buf, FT_SEGMENT_SIZE) == 0) {
-		TRACE_CATCH(zft_verify_write_segments(segment, 
-						      zft_deblock_buf, result,
-						      verify_buf),
-			    zft_vfree(&verify_buf, FT_SEGMENT_SIZE));
-		zft_vfree(&verify_buf, FT_SEGMENT_SIZE);
-	} else {
-		TRACE_CATCH(ftape_write_segment(segment, zft_deblock_buf, 
-						FT_WR_SINGLE),);
-	}
-	TRACE_EXIT 0;
-}
-
-/* non zftape volumes are handled in raw mode. Thus we need to
- * calculate the raw amount of data contained in those segments.  
- */
-static void extract_alien_volume(__u8 *entry, zft_volinfo *vtbl)
-{
-	TRACE_FUN(ft_t_flow);
-
-	vtbl->size  = (zft_calc_tape_pos(zft_last_vtbl->end_seg+1) -
-		       zft_calc_tape_pos(zft_last_vtbl->start_seg));
-	vtbl->use_compression = 0;
-	vtbl->qic113 = zft_qic113;
-	if (vtbl->qic113) {
-		TRACE(ft_t_noise, 
-		      "Fake alien volume's size from " LL_X " to " LL_X, 
-		      LL(GET8(entry, VTBL_DATA_SIZE)), LL(vtbl->size));
-	} else {
-		TRACE(ft_t_noise,
-		      "Fake alien volume's size from %d to " LL_X, 
-		      (int)GET4(entry, VTBL_DATA_SIZE), LL(vtbl->size));
-	}
-	TRACE_EXIT;
-}
-
-
-/* extract an zftape specific volume
- */
-static void extract_zft_volume(__u8 *entry, zft_volinfo *vtbl)
-{
-	TRACE_FUN(ft_t_flow);
-
-	if (vtbl->qic113) {
-		vtbl->size = GET8(entry, VTBL_DATA_SIZE);
-		vtbl->use_compression = 
-			(entry[VTBL_CMPR] & VTBL_CMPR_USED) != 0; 
-	} else {
-		vtbl->size = GET4(entry, VTBL_DATA_SIZE);
-		if (entry[VTBL_K_CMPR] & VTBL_CMPR_UNREG) {
-			vtbl->use_compression = 
-				(entry[VTBL_K_CMPR] & VTBL_CMPR_USED) != 0;
-		} else if (entry[VTBL_CMPR] & VTBL_CMPR_UNREG) {
-			vtbl->use_compression = 
-				(entry[VTBL_CMPR] & VTBL_CMPR_USED) != 0; 
-		} else {
-			TRACE(ft_t_warn, "Geeh! There is something wrong:\n"
-			      KERN_INFO "QIC compression (Rev = K): %x\n"
-			      KERN_INFO "QIC compression (Rev > K): %x",
-			      entry[VTBL_K_CMPR], entry[VTBL_CMPR]);
-		}
-	}
-	TRACE_EXIT;
-}
-
-/* extract the volume table from buffer. "buffer" must already contain
- * the vtbl-segment 
- */
-int zft_extract_volume_headers(__u8 *buffer)
-{                            
-        __u8 *entry;
-	TRACE_FUN(ft_t_flow);
-	
-	zft_init_vtbl();
-	entry = buffer;
-#ifdef ZFT_CMAP_HACK
-	if ((strncmp(&entry[VTBL_EXT+EXT_ZFTAPE_SIG], ZFTAPE_SIG,
-		     strlen(ZFTAPE_SIG)) == 0) &&
-	    entry[VTBL_EXT+EXT_ZFTAPE_CMAP] != 0) {
-		TRACE(ft_t_noise, "ignoring cmap volume");
-		entry += VTBL_SIZE;
-	} 
-#endif
-	/* the end of the vtbl is indicated by an invalid signature 
-	 */
-	while (vtbl_signature_valid(&entry[VTBL_SIG]) &&
-	       (entry - buffer) < FT_SEGMENT_SIZE) {
-		zft_new_vtbl_entry();
-		if (ft_format_code == fmt_big) {
-			/* SCSI like vtbl, stores only the number of
-			 * segments used 
-			 */
-			unsigned int num_segments= GET4(entry, VTBL_SCSI_SEGS);
-			zft_last_vtbl->start_seg = zft_eom_vtbl->start_seg;
-			zft_last_vtbl->end_seg = 
-				zft_last_vtbl->start_seg + num_segments - 1;
-		} else {
-			/* `normal', QIC-80 like vtbl 
-			 */
-			zft_last_vtbl->start_seg = GET2(entry, VTBL_START);
-			zft_last_vtbl->end_seg   = GET2(entry, VTBL_END);
-		}
-		zft_eom_vtbl->start_seg  = zft_last_vtbl->end_seg + 1;
-		/* check if we created this volume and get the
-		 * blk_sz 
-		 */
-		zft_last_vtbl->zft_volume = check_volume(entry, zft_last_vtbl);
-		if (zft_last_vtbl->zft_volume == 0) {
-			extract_alien_volume(entry, zft_last_vtbl);
-		} else {
-			extract_zft_volume(entry, zft_last_vtbl);
-		}
-		DUMP_VOLINFO(ft_t_noise, &entry[VTBL_DESC], zft_last_vtbl);
-		entry +=VTBL_SIZE;
-	}
-#if 0
-/*
- *  undefine to test end of tape handling
- */
-	zft_new_vtbl_entry();
-	zft_last_vtbl->start_seg = zft_eom_vtbl->start_seg;
-	zft_last_vtbl->end_seg   = ft_last_data_segment - 10;
-	zft_last_vtbl->blk_sz          = zft_blk_sz;
-	zft_last_vtbl->zft_volume      = 1;
-	zft_last_vtbl->qic113          = zft_qic113;
-	zft_last_vtbl->size = (zft_calc_tape_pos(zft_last_vtbl->end_seg+1)
-			       - zft_calc_tape_pos(zft_last_vtbl->start_seg));
-#endif
-	TRACE_EXIT 0;
-}
-
-/* this functions translates the failed_sector_log, misused as
- * EOF-marker list, into a virtual volume table. The table mustn't be
- * written to tape, because this would occupy the first data segment,
- * which should be the volume table, but is actually the first segment
- * that is filled with data (when using standard ftape).  We assume,
- * that we get a non-empty failed_sector_log.
- */
-int zft_fake_volume_headers (eof_mark_union *eof_map, int num_failed_sectors)
-{
-	unsigned int segment, sector;
-	int have_eom = 0;
-	int vol_no;
-	TRACE_FUN(ft_t_flow);
-
-	if ((num_failed_sectors >= 2) &&
-	    (GET2(&eof_map[num_failed_sectors - 1].mark.segment, 0) 
-	     == 
-	     GET2(&eof_map[num_failed_sectors - 2].mark.segment, 0) + 1) &&
-	    (GET2(&eof_map[num_failed_sectors - 1].mark.date, 0) == 1)) {
-		/* this should be eom. We keep the remainder of the
-		 * tape as another volume.
-		 */
-		have_eom = 1;
-	}
-	zft_init_vtbl();
-	zft_eom_vtbl->start_seg = ft_first_data_segment;
-	for(vol_no = 0; vol_no < num_failed_sectors - have_eom; vol_no ++) {
-		zft_new_vtbl_entry();
-
-		segment = GET2(&eof_map[vol_no].mark.segment, 0);
-		sector  = GET2(&eof_map[vol_no].mark.date, 0);
-
-		zft_last_vtbl->start_seg  = zft_eom_vtbl->start_seg;
-		zft_last_vtbl->end_seg    = segment;
-		zft_eom_vtbl->start_seg  = segment + 1;
-		zft_last_vtbl->blk_sz     = 1;
-		zft_last_vtbl->size       = 
-			(zft_calc_tape_pos(zft_last_vtbl->end_seg)
-			 - zft_calc_tape_pos(zft_last_vtbl->start_seg)
-			 + (sector-1) * FT_SECTOR_SIZE);
-		TRACE(ft_t_noise, 
-		      "failed sector log: segment: %d, sector: %d", 
-		      segment, sector);
-		DUMP_VOLINFO(ft_t_noise, "Faked volume", zft_last_vtbl);
-	}
-	if (!have_eom) {
-		zft_new_vtbl_entry();
-		zft_last_vtbl->start_seg = zft_eom_vtbl->start_seg;
-		zft_last_vtbl->end_seg   = ft_last_data_segment;
-		zft_eom_vtbl->start_seg  = ft_last_data_segment + 1;
-		zft_last_vtbl->size      = zft_capacity;
-		zft_last_vtbl->size     -= zft_calc_tape_pos(zft_last_vtbl->start_seg);
-		zft_last_vtbl->blk_sz    = 1;
-		DUMP_VOLINFO(ft_t_noise, "Faked volume",zft_last_vtbl);
-	}
-	TRACE_EXIT 0;
-}
-
-/* update the internal volume table
- *
- * if before start of last volume: erase all following volumes if
- * inside a volume: set end of volume to infinity
- *
- * this function is intended to be called every time _ftape_write() is
- * called
- *
- * return: 0 if no new volume was created, 1 if a new volume was
- * created
- *
- * NOTE: we don't need to check for zft_mode as ftape_write() does
- * that already. This function gets never called without accessing
- * zftape via the *qft* devices 
- */
-
-int zft_open_volume(zft_position *pos, int blk_sz, int use_compression)
-{ 
-	TRACE_FUN(ft_t_flow);
-	
-	if (!zft_qic_mode) {
-		TRACE_EXIT 0;
-	}
-	if (zft_tape_at_lbot(pos)) {
-		zft_init_vtbl();
-		if(zft_old_ftape) {
-			/* clear old ftape's eof marks */
-			zft_clear_ftape_file_marks();
-			zft_old_ftape = 0; /* no longer old ftape */
-		}
-		zft_reset_position(pos);
-	}
-	if (pos->seg_pos != zft_last_vtbl->end_seg + 1) {
-		TRACE_ABORT(-EIO, ft_t_bug, 
-		      "BUG: seg_pos: %d, zft_last_vtbl->end_seg: %d", 
-		      pos->seg_pos, zft_last_vtbl->end_seg);
-	}                            
-	TRACE(ft_t_noise, "create new volume");
-	if (zft_eom_vtbl->count >= ZFT_MAX_VOLUMES) {
-		TRACE_ABORT(-ENOSPC, ft_t_err,
-			    "Error: maxmimal number of volumes exhausted "
-			    "(maxmimum is %d)", ZFT_MAX_VOLUMES);
-	}
-	zft_new_vtbl_entry();
-	pos->volume_pos = pos->seg_byte_pos = 0;
-	zft_last_vtbl->start_seg       = pos->seg_pos;
-	zft_last_vtbl->end_seg         = ft_last_data_segment; /* infinity */
-	zft_last_vtbl->blk_sz          = blk_sz;
-	zft_last_vtbl->size            = zft_capacity;
-	zft_last_vtbl->zft_volume      = 1;
-	zft_last_vtbl->use_compression = use_compression;
-	zft_last_vtbl->qic113          = zft_qic113;
-	zft_last_vtbl->new_volume      = 1;
-	zft_last_vtbl->open            = 1;
-	zft_volume_table_changed = 1;
-	zft_eom_vtbl->start_seg  = ft_last_data_segment + 1;
-	TRACE_EXIT 0;
-}
-
-/*  perform mtfsf, mtbsf, not allowed without zft_qic_mode
- */
-int zft_skip_volumes(int count, zft_position *pos)
-{ 
-	const zft_volinfo *vtbl;
-	TRACE_FUN(ft_t_flow);
-	
-	TRACE(ft_t_noise, "count: %d", count);
-	
-	vtbl= zft_find_volume(pos->seg_pos);
-	while (count > 0 && vtbl != zft_eom_vtbl) {
-		vtbl = list_entry(vtbl->node.next, zft_volinfo, node);
-		count --;
-	}
-	while (count < 0 && vtbl != zft_first_vtbl) {
-		vtbl = list_entry(vtbl->node.prev, zft_volinfo, node);
-		count ++;
-	}
-	pos->seg_pos        = vtbl->start_seg;
-	pos->seg_byte_pos   = 0;
-	pos->volume_pos     = 0;
-	pos->tape_pos       = zft_calc_tape_pos(pos->seg_pos);
-	zft_just_before_eof = vtbl->size == 0;
-	if (zft_cmpr_ops) {
-		(*zft_cmpr_ops->reset)();
-	}
-	zft_deblock_segment = -1; /* no need to keep cache */
-	TRACE(ft_t_noise, "repositioning to:\n"
-	      KERN_INFO "zft_seg_pos        : %d\n"
-	      KERN_INFO "zft_seg_byte_pos   : %d\n"
-	      KERN_INFO "zft_tape_pos       : " LL_X "\n"
-	      KERN_INFO "zft_volume_pos     : " LL_X "\n"
-	      KERN_INFO "file number        : %d",
-	      pos->seg_pos, pos->seg_byte_pos, 
-	      LL(pos->tape_pos), LL(pos->volume_pos), vtbl->count);
-	zft_resid = count < 0 ? -count : count;
-	TRACE_EXIT zft_resid ? -EINVAL : 0;
-}
-
-/* the following simply returns the raw data position of the EOM
- * marker, MTIOCSIZE ioctl 
- */
-__s64 zft_get_eom_pos(void)
-{
-	if (zft_qic_mode) {
-		return zft_calc_tape_pos(zft_eom_vtbl->start_seg);
-	} else {
-		/* there is only one volume in raw mode */
-		return zft_capacity;
-	}
-}
-
-/* skip to eom, used for MTEOM
- */
-void zft_skip_to_eom(zft_position *pos)
-{
-	TRACE_FUN(ft_t_flow);
-	pos->seg_pos      = zft_eom_vtbl->start_seg;
-	pos->seg_byte_pos = 
-		pos->volume_pos     = 
-		zft_just_before_eof = 0;
-	pos->tape_pos = zft_calc_tape_pos(pos->seg_pos);
-	TRACE(ft_t_noise, "ftape positioned to segment %d, data pos " LL_X, 
-	      pos->seg_pos, LL(pos->tape_pos));
-	TRACE_EXIT;
-}
-
-/*  write an EOF-marker by setting zft_last_vtbl->end_seg to seg_pos.
- *  NOTE: this function assumes that zft_last_vtbl points to a valid
- *  vtbl entry
- *
- *  NOTE: this routine always positions before the EOF marker
- */
-int zft_close_volume(zft_position *pos)
-{
-	TRACE_FUN(ft_t_any);
-
-	if (zft_vtbl_empty || !zft_last_vtbl->open) { /* should not happen */
-		TRACE(ft_t_noise, "There are no volumes to finish");
-		TRACE_EXIT -EIO;
-	}
-	if (pos->seg_byte_pos == 0 && 
-	    pos->seg_pos != zft_last_vtbl->start_seg) {
-		pos->seg_pos --;
-		pos->seg_byte_pos      = zft_get_seg_sz(pos->seg_pos);
-	}
-	zft_last_vtbl->end_seg   = pos->seg_pos;
-	zft_last_vtbl->size      = pos->volume_pos;
-	zft_volume_table_changed = 1;
-	zft_just_before_eof      = 1;
-	zft_eom_vtbl->start_seg  = zft_last_vtbl->end_seg + 1;
-	zft_last_vtbl->open      = 0; /* closed */
-	TRACE_EXIT 0;
-}
-
-/* write count file-marks at current position. 
- *
- *  The tape is positioned after the eof-marker, that is at byte 0 of
- *  the segment following the eof-marker
- *
- *  this function is only allowed in zft_qic_mode
- *
- *  Only allowed when tape is at BOT or EOD.
- */
-int zft_weof(unsigned int count, zft_position *pos)
-{
-	
-	TRACE_FUN(ft_t_flow);
-
-	if (!count) { /* write zero EOF marks should be a real no-op */
-		TRACE_EXIT 0;
-	}
-	zft_volume_table_changed = 1;
-	if (zft_tape_at_lbot(pos)) {
-		zft_init_vtbl();
-		if(zft_old_ftape) {
-			/* clear old ftape's eof marks */
-			zft_clear_ftape_file_marks();
-			zft_old_ftape = 0;    /* no longer old ftape */
-		}
-	}
-	if (zft_last_vtbl->open) {
-		zft_close_volume(pos);
-		zft_move_past_eof(pos);
-		count --;
-	}
-	/* now it's easy, just append eof-marks, that is empty
-	 * volumes, to the end of the already recorded media.
-	 */
-	while (count > 0 && 
-	       pos->seg_pos <= ft_last_data_segment && 
-	       zft_eom_vtbl->count < ZFT_MAX_VOLUMES) {
-		TRACE(ft_t_noise,
-		      "Writing zero sized file at segment %d", pos->seg_pos);
-		zft_new_vtbl_entry();
-		zft_last_vtbl->start_seg       = pos->seg_pos;
-		zft_last_vtbl->end_seg         = pos->seg_pos;
-		zft_last_vtbl->size            = 0;
-		zft_last_vtbl->blk_sz          = zft_blk_sz;
-		zft_last_vtbl->zft_volume      = 1;
-		zft_last_vtbl->use_compression = 0;
-		pos->tape_pos += zft_get_seg_sz(pos->seg_pos);
-		zft_eom_vtbl->start_seg = ++ pos->seg_pos;
-		count --;
-	} 
-	if (count > 0) {
-		/*  there are two possibilities: end of tape, or the
-		 *  maximum number of files is exhausted.
-		 */
-		zft_resid = count;
-		TRACE(ft_t_noise,"Number of marks NOT written: %d", zft_resid);
-		if (zft_eom_vtbl->count == ZFT_MAX_VOLUMES) {
-			TRACE_ABORT(-EINVAL, ft_t_warn,
-				    "maximum allowed number of files "
-				    "exhausted: %d", ZFT_MAX_VOLUMES);
-		} else {
-			TRACE_ABORT(-ENOSPC,
-				    ft_t_noise, "reached end of tape");
-		}
-	}
-	TRACE_EXIT 0;
-}
-
-const zft_volinfo *zft_find_volume(unsigned int seg_pos)
-{
-	TRACE_FUN(ft_t_flow);
-	
-	TRACE(ft_t_any, "called with seg_pos %d",seg_pos);
-	if (!zft_qic_mode) {
-		if (seg_pos > ft_last_data_segment) {
-			TRACE_EXIT &eot_vtbl;
-		}
-		tape_vtbl.blk_sz =  zft_blk_sz;
-		TRACE_EXIT &tape_vtbl;
-	}
-	if (seg_pos < zft_first_vtbl->start_seg) {
-		TRACE_EXIT (cur_vtbl = zft_first_vtbl);
-	}
-	while (seg_pos > cur_vtbl->end_seg) {
-		cur_vtbl = list_entry(cur_vtbl->node.next, zft_volinfo, node);
-		TRACE(ft_t_noise, "%d - %d", cur_vtbl->start_seg, cur_vtbl->end_seg);
-	}
-	while (seg_pos < cur_vtbl->start_seg) {
-		cur_vtbl = list_entry(cur_vtbl->node.prev, zft_volinfo, node);
-		TRACE(ft_t_noise, "%d - %d", cur_vtbl->start_seg, cur_vtbl->end_seg);
-	}
-	if (seg_pos > cur_vtbl->end_seg || seg_pos < cur_vtbl->start_seg) {
-		TRACE(ft_t_bug, "This cannot happen");
-	}
-	DUMP_VOLINFO(ft_t_noise, "", cur_vtbl);
-	TRACE_EXIT cur_vtbl;
-}
-
-/* this function really assumes that we are just before eof
- */
-void zft_move_past_eof(zft_position *pos)
-{ 
-	TRACE_FUN(ft_t_flow);
-
-	TRACE(ft_t_noise, "old seg. pos: %d", pos->seg_pos);
-	pos->tape_pos += zft_get_seg_sz(pos->seg_pos++) - pos->seg_byte_pos;
-	pos->seg_byte_pos = 0;
-	pos->volume_pos   = 0;
-	if (zft_cmpr_ops) {
-		(*zft_cmpr_ops->reset)();
-	}
-	zft_just_before_eof =  0;
-	zft_deblock_segment = -1; /* no need to cache it anymore */
-	TRACE(ft_t_noise, "new seg. pos: %d", pos->seg_pos);
-	TRACE_EXIT;
-}