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-rw-r--r--drivers/char/ftape/zftape/zftape-eof.c199
1 files changed, 0 insertions, 199 deletions
diff --git a/drivers/char/ftape/zftape/zftape-eof.c b/drivers/char/ftape/zftape/zftape-eof.c
deleted file mode 100644
index dcadcae..0000000
--- a/drivers/char/ftape/zftape/zftape-eof.c
+++ /dev/null
@@ -1,199 +0,0 @@
-/*
- * I use these routines just to decide when I have to fake a
- * volume-table to preserve compatibility to original ftape.
- */
-/*
- * Copyright (C) 1994-1995 Bas Laarhoven.
- *
- * Modified for zftape 1996, 1997 Claus 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-eof.c,v $
- * $Revision: 1.2 $
- * $Date: 1997/10/05 19:19:02 $
- *
- * This file contains the eof mark handling code
- * for the QIC-40/80 floppy-tape driver for Linux.
- */
-
-#include <linux/string.h>
-#include <linux/errno.h>
-
-#include <linux/zftape.h>
-
-#include "../zftape/zftape-init.h"
-#include "../zftape/zftape-rw.h"
-#include "../zftape/zftape-eof.h"
-
-/* Global vars.
- */
-
-/* a copy of the failed sector log from the header segment.
- */
-eof_mark_union *zft_eof_map;
-
-/* number of eof marks (entries in bad sector log) on tape.
- */
-int zft_nr_eof_marks = -1;
-
-
-/* Local vars.
- */
-
-static char linux_tape_label[] = "Linux raw format V";
-enum {
- min_fmt_version = 1, max_fmt_version = 2
-};
-static unsigned ftape_fmt_version = 0;
-
-
-/* Ftape (mis)uses the bad sector log to record end-of-file marks.
- * Initially (when the tape is erased) all entries in the bad sector
- * log are added to the tape's bad sector map. The bad sector log then
- * is cleared.
- *
- * The bad sector log normally contains entries of the form:
- * even 16-bit word: segment number of bad sector
- * odd 16-bit word: encoded date
- * There can be a total of 448 entries (1792 bytes).
- *
- * My guess is that no program is using this bad sector log (the *
- * format seems useless as there is no indication of the bad sector
- * itself, only the segment) However, if any program does use the bad
- * sector log, the format used by ftape will let the program think
- * there are some bad sectors and no harm is done.
- *
- * The eof mark entries that ftape stores in the bad sector log: even
- * 16-bit word: segment number of eof mark odd 16-bit word: sector
- * number of eof mark [1..32]
- *
- * The zft_eof_map as maintained is a sorted list of eof mark entries.
- *
- *
- * The tape name field in the header segments is used to store a linux
- * tape identification string and a version number. This way the tape
- * can be recognized as a Linux raw format tape when using tools under
- * other OS's.
- *
- * 'Wide' QIC tapes (format code 4) don't have a failed sector list
- * anymore. That space is used for the (longer) bad sector map that
- * now is a variable length list too. We now store our end-of-file
- * marker list after the bad-sector-map on tape. The list is delimited
- * by a (__u32) 0 entry.
- */
-
-int zft_ftape_validate_label(char *label)
-{
- static char tmp_label[45];
- int result = 0;
- TRACE_FUN(ft_t_any);
-
- memcpy(tmp_label, label, FT_LABEL_SZ);
- tmp_label[FT_LABEL_SZ] = '\0';
- TRACE(ft_t_noise, "tape label = `%s'", tmp_label);
- ftape_fmt_version = 0;
- if (memcmp(label, linux_tape_label, strlen(linux_tape_label)) == 0) {
- int pos = strlen(linux_tape_label);
- while (label[pos] >= '0' && label[pos] <= '9') {
- ftape_fmt_version *= 10;
- ftape_fmt_version = label[ pos++] - '0';
- }
- result = (ftape_fmt_version >= min_fmt_version &&
- ftape_fmt_version <= max_fmt_version);
- }
- TRACE(ft_t_noise, "format version = %d", ftape_fmt_version);
- TRACE_EXIT result;
-}
-
-static __u8 * find_end_of_eof_list(__u8 * ptr, __u8 * limit)
-{
- while (ptr + 3 < limit) {
-
- if (get_unaligned((__u32*)ptr)) {
- ptr += sizeof(__u32);
- } else {
- return ptr;
- }
- }
- return NULL;
-}
-
-void zft_ftape_extract_file_marks(__u8* address)
-{
- int i;
- TRACE_FUN(ft_t_any);
-
- zft_eof_map = NULL;
- if (ft_format_code == fmt_var || ft_format_code == fmt_big) {
- __u8* end;
- __u8* start = ftape_find_end_of_bsm_list(address);
-
- zft_nr_eof_marks = 0;
- if (start) {
- start += 3; /* skip end of list mark */
- end = find_end_of_eof_list(start,
- address + FT_SEGMENT_SIZE);
- if (end && end - start <= FT_FSL_SIZE) {
- zft_nr_eof_marks = ((end - start) /
- sizeof(eof_mark_union));
- zft_eof_map = (eof_mark_union *)start;
- } else {
- TRACE(ft_t_err,
- "EOF Mark List is too long or damaged!");
- }
- } else {
- TRACE(ft_t_err,
- "Bad Sector List is too long or damaged !");
- }
- } else {
- zft_eof_map = (eof_mark_union *)&address[FT_FSL];
- zft_nr_eof_marks = GET2(address, FT_FSL_CNT);
- }
- TRACE(ft_t_noise, "number of file marks: %d", zft_nr_eof_marks);
- if (ftape_fmt_version == 1) {
- TRACE(ft_t_info, "swapping version 1 fields");
- /* version 1 format uses swapped sector and segment
- * fields, correct that !
- */
- for (i = 0; i < zft_nr_eof_marks; ++i) {
- __u16 tmp = GET2(&zft_eof_map[i].mark.segment,0);
- PUT2(&zft_eof_map[i].mark.segment, 0,
- GET2(&zft_eof_map[i].mark.date,0));
- PUT2(&zft_eof_map[i].mark.date, 0, tmp);
- }
- }
- for (i = 0; i < zft_nr_eof_marks; ++i) {
- TRACE(ft_t_noise, "eof mark: %5d/%2d",
- GET2(&zft_eof_map[i].mark.segment, 0),
- GET2(&zft_eof_map[i].mark.date,0));
- }
- TRACE_EXIT;
-}
-
-void zft_clear_ftape_file_marks(void)
-{
- TRACE_FUN(ft_t_flow);
- /* Clear failed sector log: remove all tape marks. We
- * don't use old ftape-style EOF-marks.
- */
- TRACE(ft_t_info, "Clearing old ftape's eof map");
- memset(zft_eof_map, 0, zft_nr_eof_marks * sizeof(__u32));
- zft_nr_eof_marks = 0;
- PUT2(zft_hseg_buf, FT_FSL_CNT, 0); /* nr of eof-marks */
- zft_header_changed = 1;
- zft_update_label(zft_hseg_buf);
- TRACE_EXIT;
-}
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