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-rw-r--r--drivers/char/ftape/zftape/zftape-ctl.c1417
1 files changed, 0 insertions, 1417 deletions
diff --git a/drivers/char/ftape/zftape/zftape-ctl.c b/drivers/char/ftape/zftape/zftape-ctl.c
deleted file mode 100644
index 22ba0f5..0000000
--- a/drivers/char/ftape/zftape/zftape-ctl.c
+++ /dev/null
@@ -1,1417 +0,0 @@
-/*
- * 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/ftape/zftape/zftape-ctl.c,v $
- * $Revision: 1.2.6.2 $
- * $Date: 1997/11/14 18:07:33 $
- *
- * This file contains the non-read/write zftape functions
- * for the QIC-40/80/3010/3020 floppy-tape driver for Linux.
- */
-
-#include <linux/errno.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/fcntl.h>
-
-#include <linux/zftape.h>
-
-#include <asm/uaccess.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"
-
-/* Global vars.
- */
-int zft_write_protected; /* this is when cartridge rdonly or O_RDONLY */
-int zft_header_read;
-int zft_offline;
-unsigned int zft_unit;
-int zft_resid;
-int zft_mt_compression;
-
-/* Local vars.
- */
-static int going_offline;
-
-typedef int (mt_fun)(int *argptr);
-typedef int (*mt_funp)(int *argptr);
-typedef struct
-{
- mt_funp function;
- unsigned offline : 1; /* op permitted if offline or no_tape */
- unsigned write_protected : 1; /* op permitted if write-protected */
- unsigned not_formatted : 1; /* op permitted if tape not formatted */
- unsigned raw_mode : 1; /* op permitted if zft_mode == 0 */
- unsigned need_idle_state : 1; /* need to call def_idle_state */
- char *name;
-} fun_entry;
-
-static mt_fun mt_dummy, mt_reset, mt_fsr, mt_bsr, mt_rew, mt_offl, mt_nop,
- mt_weof, mt_erase, mt_ras2, mt_setblk, mt_setdensity,
- mt_seek, mt_tell, mt_reten, mt_eom, mt_fsf, mt_bsf,
- mt_fsfm, mt_bsfm, mt_setdrvbuffer, mt_compression;
-
-static fun_entry mt_funs[]=
-{
- {mt_reset , 1, 1, 1, 1, 0, "MT_RESET" }, /* 0 */
- {mt_fsf , 0, 1, 0, 0, 1, "MT_FSF" },
- {mt_bsf , 0, 1, 0, 0, 1, "MT_BSF" },
- {mt_fsr , 0, 1, 0, 1, 1, "MT_FSR" },
- {mt_bsr , 0, 1, 0, 1, 1, "MT_BSR" },
- {mt_weof , 0, 0, 0, 0, 0, "MT_WEOF" }, /* 5 */
- {mt_rew , 0, 1, 1, 1, 0, "MT_REW" },
- {mt_offl , 0, 1, 1, 1, 0, "MT_OFFL" },
- {mt_nop , 1, 1, 1, 1, 0, "MT_NOP" },
- {mt_reten , 0, 1, 1, 1, 0, "MT_RETEN" },
- {mt_bsfm , 0, 1, 0, 0, 1, "MT_BSFM" }, /* 10 */
- {mt_fsfm , 0, 1, 0, 0, 1, "MT_FSFM" },
- {mt_eom , 0, 1, 0, 0, 1, "MT_EOM" },
- {mt_erase , 0, 0, 0, 1, 0, "MT_ERASE" },
- {mt_dummy , 1, 1, 1, 1, 0, "MT_RAS1" },
- {mt_ras2 , 0, 0, 0, 1, 0, "MT_RAS2" },
- {mt_dummy , 1, 1, 1, 1, 0, "MT_RAS3" },
- {mt_dummy , 1, 1, 1, 1, 0, "UNKNOWN" },
- {mt_dummy , 1, 1, 1, 1, 0, "UNKNOWN" },
- {mt_dummy , 1, 1, 1, 1, 0, "UNKNOWN" },
- {mt_setblk , 1, 1, 1, 1, 1, "MT_SETBLK"}, /* 20 */
- {mt_setdensity , 1, 1, 1, 1, 0, "MT_SETDENSITY"},
- {mt_seek , 0, 1, 0, 1, 1, "MT_SEEK" },
- {mt_dummy , 0, 1, 0, 1, 1, "MT_TELL" }, /* wr-only ?! */
- {mt_setdrvbuffer, 1, 1, 1, 1, 0, "MT_SETDRVBUFFER" },
- {mt_dummy , 1, 1, 1, 1, 0, "MT_FSS" }, /* 25 */
- {mt_dummy , 1, 1, 1, 1, 0, "MT_BSS" },
- {mt_dummy , 1, 1, 1, 1, 0, "MT_WSM" },
- {mt_dummy , 1, 1, 1, 1, 0, "MT_LOCK" },
- {mt_dummy , 1, 1, 1, 1, 0, "MT_UNLOCK"},
- {mt_dummy , 1, 1, 1, 1, 0, "MT_LOAD" }, /* 30 */
- {mt_dummy , 1, 1, 1, 1, 0, "MT_UNLOAD"},
- {mt_compression , 1, 1, 1, 0, 1, "MT_COMPRESSION"},
- {mt_dummy , 1, 1, 1, 1, 0, "MT_SETPART"},
- {mt_dummy , 1, 1, 1, 1, 0, "MT_MKPART"}
-};
-
-#define NR_MT_CMDS NR_ITEMS(mt_funs)
-
-void zft_reset_position(zft_position *pos)
-{
- TRACE_FUN(ft_t_flow);
-
- pos->seg_byte_pos =
- pos->volume_pos = 0;
- if (zft_header_read) {
- /* need to keep track of the volume table and
- * compression map. We therefor simply
- * position at the beginning of the first
- * volume. This covers old ftape archives as
- * well has various flavours of the
- * compression map segments. The worst case is
- * that the compression map shows up as a
- * additional volume in front of all others.
- */
- pos->seg_pos = zft_find_volume(0)->start_seg;
- pos->tape_pos = zft_calc_tape_pos(pos->seg_pos);
- } else {
- pos->tape_pos = 0;
- pos->seg_pos = -1;
- }
- zft_just_before_eof = 0;
- zft_deblock_segment = -1;
- zft_io_state = zft_idle;
- zft_zap_read_buffers();
- zft_prevent_flush();
- /* unlock the compresison module if it is loaded.
- * The zero arg means not to try to load the module.
- */
- if (zft_cmpr_lock(0) == 0) {
- (*zft_cmpr_ops->reset)(); /* unlock */
- }
- TRACE_EXIT;
-}
-
-static void zft_init_driver(void)
-{
- TRACE_FUN(ft_t_flow);
-
- zft_resid =
- zft_header_read =
- zft_old_ftape =
- zft_offline =
- zft_write_protected =
- going_offline =
- zft_mt_compression =
- zft_header_changed =
- zft_volume_table_changed =
- zft_written_segments = 0;
- zft_blk_sz = CONFIG_ZFT_DFLT_BLK_SZ;
- zft_reset_position(&zft_pos); /* does most of the stuff */
- ftape_zap_read_buffers();
- ftape_set_state(idle);
- TRACE_EXIT;
-}
-
-int zft_def_idle_state(void)
-{
- int result = 0;
- TRACE_FUN(ft_t_flow);
-
- if (!zft_header_read) {
- result = zft_read_header_segments();
- } else if ((result = zft_flush_buffers()) >= 0 && zft_qic_mode) {
- /* don't move past eof
- */
- (void)zft_close_volume(&zft_pos);
- }
- if (ftape_abort_operation() < 0) {
- TRACE(ft_t_warn, "ftape_abort_operation() failed");
- result = -EIO;
- }
- /* clear remaining read buffers */
- zft_zap_read_buffers();
- zft_io_state = zft_idle;
- TRACE_EXIT result;
-}
-
-/*****************************************************************************
- * *
- * functions for the MTIOCTOP commands *
- * *
- *****************************************************************************/
-
-static int mt_dummy(int *dummy)
-{
- TRACE_FUN(ft_t_flow);
-
- TRACE_EXIT -ENOSYS;
-}
-
-static int mt_reset(int *dummy)
-{
- TRACE_FUN(ft_t_flow);
-
- (void)ftape_seek_to_bot();
- TRACE_CATCH(ftape_reset_drive(),
- zft_init_driver(); zft_uninit_mem(); zft_offline = 1);
- /* fake a re-open of the device. This will set all flage and
- * allocate buffers as appropriate. The new tape condition will
- * force the open routine to do anything we need.
- */
- TRACE_CATCH(_zft_open(-1 /* fake reopen */, 0 /* dummy */),);
- TRACE_EXIT 0;
-}
-
-static int mt_fsf(int *arg)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- result = zft_skip_volumes(*arg, &zft_pos);
- zft_just_before_eof = 0;
- TRACE_EXIT result;
-}
-
-static int mt_bsf(int *arg)
-{
- int result = 0;
- TRACE_FUN(ft_t_flow);
-
- if (*arg != 0) {
- result = zft_skip_volumes(-*arg + 1, &zft_pos);
- }
- TRACE_EXIT result;
-}
-
-static int seek_block(__s64 data_offset,
- __s64 block_increment,
- zft_position *pos)
-{
- int result = 0;
- __s64 new_block_pos;
- __s64 vol_block_count;
- const zft_volinfo *volume;
- int exceed;
- TRACE_FUN(ft_t_flow);
-
- volume = zft_find_volume(pos->seg_pos);
- if (volume->start_seg == 0 || volume->end_seg == 0) {
- TRACE_EXIT -EIO;
- }
- new_block_pos = (zft_div_blksz(data_offset, volume->blk_sz)
- + block_increment);
- vol_block_count = zft_div_blksz(volume->size, volume->blk_sz);
- if (new_block_pos < 0) {
- TRACE(ft_t_noise,
- "new_block_pos " LL_X " < 0", LL(new_block_pos));
- zft_resid = (int)new_block_pos;
- new_block_pos = 0;
- exceed = 1;
- } else if (new_block_pos > vol_block_count) {
- TRACE(ft_t_noise,
- "new_block_pos " LL_X " exceeds size of volume " LL_X,
- LL(new_block_pos), LL(vol_block_count));
- zft_resid = (int)(vol_block_count - new_block_pos);
- new_block_pos = vol_block_count;
- exceed = 1;
- } else {
- exceed = 0;
- }
- if (zft_use_compression && volume->use_compression) {
- TRACE_CATCH(zft_cmpr_lock(1 /* try to load */),);
- result = (*zft_cmpr_ops->seek)(new_block_pos, pos, volume,
- zft_deblock_buf);
- pos->tape_pos = zft_calc_tape_pos(pos->seg_pos);
- pos->tape_pos += pos->seg_byte_pos;
- } else {
- pos->volume_pos = zft_mul_blksz(new_block_pos, volume->blk_sz);
- pos->tape_pos = zft_calc_tape_pos(volume->start_seg);
- pos->tape_pos += pos->volume_pos;
- pos->seg_pos = zft_calc_seg_byte_coord(&pos->seg_byte_pos,
- pos->tape_pos);
- }
- zft_just_before_eof = volume->size == pos->volume_pos;
- if (zft_just_before_eof) {
- /* why this? because zft_file_no checks agains start
- * and end segment of a volume. We do not want to
- * advance to the next volume with this function.
- */
- TRACE(ft_t_noise, "set zft_just_before_eof");
- zft_position_before_eof(pos, volume);
- }
- TRACE(ft_t_noise, "\n"
- KERN_INFO "new_seg_pos : %d\n"
- KERN_INFO "new_tape_pos: " LL_X "\n"
- KERN_INFO "vol_size : " LL_X "\n"
- KERN_INFO "seg_byte_pos: %d\n"
- KERN_INFO "blk_sz : %d",
- pos->seg_pos, LL(pos->tape_pos),
- LL(volume->size), pos->seg_byte_pos,
- volume->blk_sz);
- if (!exceed) {
- zft_resid = new_block_pos - zft_div_blksz(pos->volume_pos,
- volume->blk_sz);
- }
- if (zft_resid < 0) {
- zft_resid = -zft_resid;
- }
- TRACE_EXIT ((exceed || zft_resid != 0) && result >= 0) ? -EINVAL : result;
-}
-
-static int mt_fsr(int *arg)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- result = seek_block(zft_pos.volume_pos, *arg, &zft_pos);
- TRACE_EXIT result;
-}
-
-static int mt_bsr(int *arg)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- result = seek_block(zft_pos.volume_pos, -*arg, &zft_pos);
- TRACE_EXIT result;
-}
-
-static int mt_weof(int *arg)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- TRACE_CATCH(zft_flush_buffers(),);
- result = zft_weof(*arg, &zft_pos);
- TRACE_EXIT result;
-}
-
-static int mt_rew(int *dummy)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- if(zft_header_read) {
- (void)zft_def_idle_state();
- }
- result = ftape_seek_to_bot();
- zft_reset_position(&zft_pos);
- TRACE_EXIT result;
-}
-
-static int mt_offl(int *dummy)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- going_offline= 1;
- result = mt_rew(NULL);
- TRACE_EXIT result;
-}
-
-static int mt_nop(int *dummy)
-{
- TRACE_FUN(ft_t_flow);
- /* should we set tape status?
- */
- if (!zft_offline) { /* offline includes no_tape */
- (void)zft_def_idle_state();
- }
- TRACE_EXIT 0;
-}
-
-static int mt_reten(int *dummy)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- if(zft_header_read) {
- (void)zft_def_idle_state();
- }
- result = ftape_seek_to_eot();
- if (result >= 0) {
- result = ftape_seek_to_bot();
- }
- TRACE_EXIT(result);
-}
-
-static int fsfbsfm(int arg, zft_position *pos)
-{
- const zft_volinfo *vtbl;
- __s64 block_pos;
- TRACE_FUN(ft_t_flow);
-
- /* What to do? This should seek to the next file-mark and
- * position BEFORE. That is, a next write would just extend
- * the current file. Well. Let's just seek to the end of the
- * current file, if count == 1. If count > 1, then do a
- * "mt_fsf(count - 1)", and then seek to the end of that file.
- * If count == 0, do nothing
- */
- if (arg == 0) {
- TRACE_EXIT 0;
- }
- zft_just_before_eof = 0;
- TRACE_CATCH(zft_skip_volumes(arg < 0 ? arg : arg-1, pos),
- if (arg > 0) {
- zft_resid ++;
- });
- vtbl = zft_find_volume(pos->seg_pos);
- block_pos = zft_div_blksz(vtbl->size, vtbl->blk_sz);
- (void)seek_block(0, block_pos, pos);
- if (pos->volume_pos != vtbl->size) {
- zft_just_before_eof = 0;
- zft_resid = 1;
- /* we didn't managed to go there */
- TRACE_ABORT(-EIO, ft_t_err,
- "wanted file position " LL_X ", arrived at " LL_X,
- LL(vtbl->size), LL(pos->volume_pos));
- }
- zft_just_before_eof = 1;
- TRACE_EXIT 0;
-}
-
-static int mt_bsfm(int *arg)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- result = fsfbsfm(-*arg, &zft_pos);
- TRACE_EXIT result;
-}
-
-static int mt_fsfm(int *arg)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- result = fsfbsfm(*arg, &zft_pos);
- TRACE_EXIT result;
-}
-
-static int mt_eom(int *dummy)
-{
- TRACE_FUN(ft_t_flow);
-
- zft_skip_to_eom(&zft_pos);
- TRACE_EXIT 0;
-}
-
-static int mt_erase(int *dummy)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- result = zft_erase();
- TRACE_EXIT result;
-}
-
-static int mt_ras2(int *dummy)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- result = -ENOSYS;
- TRACE_EXIT result;
-}
-
-/* Sets the new blocksize in BYTES
- *
- */
-static int mt_setblk(int *new_size)
-{
- TRACE_FUN(ft_t_flow);
-
- if((unsigned int)(*new_size) > ZFT_MAX_BLK_SZ) {
- TRACE_ABORT(-EINVAL, ft_t_info,
- "desired blk_sz (%d) should be <= %d bytes",
- *new_size, ZFT_MAX_BLK_SZ);
- }
- if ((*new_size & (FT_SECTOR_SIZE-1)) != 0) {
- TRACE_ABORT(-EINVAL, ft_t_info,
- "desired blk_sz (%d) must be a multiple of %d bytes",
- *new_size, FT_SECTOR_SIZE);
- }
- if (*new_size == 0) {
- if (zft_use_compression) {
- TRACE_ABORT(-EINVAL, ft_t_info,
- "Variable block size not yet "
- "supported with compression");
- }
- *new_size = 1;
- }
- zft_blk_sz = *new_size;
- TRACE_EXIT 0;
-}
-
-static int mt_setdensity(int *arg)
-{
- TRACE_FUN(ft_t_flow);
-
- SET_TRACE_LEVEL(*arg);
- TRACE(TRACE_LEVEL, "tracing set to %d", TRACE_LEVEL);
- if ((int)TRACE_LEVEL != *arg) {
- TRACE_EXIT -EINVAL;
- }
- TRACE_EXIT 0;
-}
-
-static int mt_seek(int *new_block_pos)
-{
- int result= 0;
- TRACE_FUN(ft_t_any);
-
- result = seek_block(0, (__s64)*new_block_pos, &zft_pos);
- TRACE_EXIT result;
-}
-
-/* OK, this is totally different from SCSI, but the worst thing that can
- * happen is that there is not enough defragmentated memory that can be
- * allocated. Also, there is a hardwired limit of 16 dma buffers in the
- * stock ftape module. This shouldn't bring the system down.
- *
- * NOTE: the argument specifies the total number of dma buffers to use.
- * The driver needs at least 3 buffers to function at all.
- *
- */
-static int mt_setdrvbuffer(int *cnt)
-{
- TRACE_FUN(ft_t_flow);
-
- if (*cnt < 3) {
- TRACE_EXIT -EINVAL;
- }
- TRACE_CATCH(ftape_set_nr_buffers(*cnt),);
- TRACE_EXIT 0;
-}
-/* return the block position from start of volume
- */
-static int mt_tell(int *arg)
-{
- TRACE_FUN(ft_t_flow);
-
- *arg = zft_div_blksz(zft_pos.volume_pos,
- zft_find_volume(zft_pos.seg_pos)->blk_sz);
- TRACE_EXIT 0;
-}
-
-static int mt_compression(int *arg)
-{
- TRACE_FUN(ft_t_flow);
-
- /* Ok. We could also check whether compression is available at
- * all by trying to load the compression module. We could
- * also check for a block size of 1 byte which is illegal
- * with compression. Instead of doing it here we rely on
- * zftape_write() to do the proper checks.
- */
- if ((unsigned int)*arg > 1) {
- TRACE_EXIT -EINVAL;
- }
- if (*arg != 0 && zft_blk_sz == 1) { /* variable block size */
- TRACE_ABORT(-EINVAL, ft_t_info,
- "Compression not yet supported "
- "with variable block size");
- }
- zft_mt_compression = *arg;
- if ((zft_unit & ZFT_ZIP_MODE) == 0) {
- zft_use_compression = zft_mt_compression;
- }
- TRACE_EXIT 0;
-}
-
-/* check whether write access is allowed. Write access is denied when
- * + zft_write_protected == 1 -- this accounts for either hard write
- * protection of the cartridge or for
- * O_RDONLY access mode of the tape device
- * + zft_offline == 1 -- this meany that there is either no tape
- * or that the MTOFFLINE ioctl has been
- * previously issued (`soft eject')
- * + ft_formatted == 0 -- this means that the cartridge is not
- * formatted
- * Then we distinuguish two cases. When zft_qic_mode is TRUE, then we try
- * to emulate a `traditional' (aka SCSI like) UN*X tape device. Therefore we
- * deny writes when
- * + zft_qic_mode ==1 &&
- * (!zft_tape_at_lbot() && -- tape no at logical BOT
- * !(zft_tape_at_eom() || -- tape not at logical EOM (or EOD)
- * (zft_tape_at_eom() &&
- * zft_old_ftape()))) -- we can't add new volume to tapes
- * written by old ftape because ftape
- * don't use the volume table
- *
- * when the drive is in true raw mode (aka /dev/rawft0) then we don't
- * care about LBOT and EOM conditions. This device is intended for a
- * user level program that wants to truly implement the QIC-80 compliance
- * at the logical data layout level of the cartridge, i.e. implement all
- * that volume table and volume directory stuff etc.<
- */
-int zft_check_write_access(zft_position *pos)
-{
- TRACE_FUN(ft_t_flow);
-
- if (zft_offline) { /* offline includes no_tape */
- TRACE_ABORT(-ENXIO,
- ft_t_info, "tape is offline or no cartridge");
- }
- if (!ft_formatted) {
- TRACE_ABORT(-EACCES, ft_t_info, "tape is not formatted");
- }
- if (zft_write_protected) {
- TRACE_ABORT(-EACCES, ft_t_info, "cartridge write protected");
- }
- if (zft_qic_mode) {
- /* check BOT condition */
- if (!zft_tape_at_lbot(pos)) {
- /* protect cartridges written by old ftape if
- * not at BOT because they use the vtbl
- * segment for storing data
- */
- if (zft_old_ftape) {
- TRACE_ABORT(-EACCES, ft_t_warn,
- "Cannot write to cartridges written by old ftape when not at BOT");
- }
- /* not at BOT, but allow writes at EOD, of course
- */
- if (!zft_tape_at_eod(pos)) {
- TRACE_ABORT(-EACCES, ft_t_info,
- "tape not at BOT and not at EOD");
- }
- }
- /* fine. Now the tape is either at BOT or at EOD. */
- }
- /* or in raw mode in which case we don't care about BOT and EOD */
- TRACE_EXIT 0;
-}
-
-/* OPEN routine called by kernel-interface code
- *
- * NOTE: this is also called by mt_reset() with dev_minor == -1
- * to fake a reopen after a reset.
- */
-int _zft_open(unsigned int dev_minor, unsigned int access_mode)
-{
- static unsigned int tape_unit;
- static unsigned int file_access_mode;
- int result;
- TRACE_FUN(ft_t_flow);
-
- if ((int)dev_minor == -1) {
- /* fake reopen */
- zft_unit = tape_unit;
- access_mode = file_access_mode;
- zft_init_driver(); /* reset all static data to defaults */
- } else {
- tape_unit = dev_minor;
- file_access_mode = access_mode;
- if ((result = ftape_enable(FTAPE_SEL(dev_minor))) < 0) {
- TRACE_ABORT(-ENXIO, ft_t_err,
- "ftape_enable failed: %d", result);
- }
- if (ft_new_tape || ft_no_tape || !ft_formatted ||
- (FTAPE_SEL(zft_unit) != FTAPE_SEL(dev_minor)) ||
- (zft_unit & ZFT_RAW_MODE) != (dev_minor & ZFT_RAW_MODE)) {
- /* reset all static data to defaults,
- */
- zft_init_driver();
- }
- zft_unit = dev_minor;
- }
- zft_set_flags(zft_unit); /* decode the minor bits */
- if (zft_blk_sz == 1 && zft_use_compression) {
- ftape_disable(); /* resets ft_no_tape */
- TRACE_ABORT(-ENODEV, ft_t_warn, "Variable block size not yet "
- "supported with compression");
- }
- /* no need for most of the buffers when no tape or not
- * formatted. for the read/write operations, it is the
- * regardless whether there is no tape, a not-formatted tape
- * or the whether the driver is soft offline.
- * Nevertheless we allow some ioctls with non-formatted tapes,
- * like rewind and reset.
- */
- if (ft_no_tape || !ft_formatted) {
- zft_uninit_mem();
- }
- if (ft_no_tape) {
- zft_offline = 1; /* so we need not test two variables */
- }
- if ((access_mode == O_WRONLY || access_mode == O_RDWR) &&
- (ft_write_protected || ft_no_tape)) {
- ftape_disable(); /* resets ft_no_tape */
- TRACE_ABORT(ft_no_tape ? -ENXIO : -EROFS,
- ft_t_warn, "wrong access mode %s cartridge",
- ft_no_tape ? "without a" : "with write protected");
- }
- zft_write_protected = (access_mode == O_RDONLY ||
- ft_write_protected != 0);
- if (zft_write_protected) {
- TRACE(ft_t_noise,
- "read only access mode: %d, "
- "drive write protected: %d",
- access_mode == O_RDONLY,
- ft_write_protected != 0);
- }
- if (!zft_offline) {
- TRACE_CATCH(zft_vmalloc_once(&zft_deblock_buf,FT_SEGMENT_SIZE),
- ftape_disable());
- }
- /* zft_seg_pos should be greater than the vtbl segpos but not
- * if in compatibility mode and only after we read in the
- * header segments
- *
- * might also be a problem if the user makes a backup with a
- * *qft* device and rewinds it with a raw device.
- */
- if (zft_qic_mode &&
- !zft_old_ftape &&
- zft_pos.seg_pos >= 0 &&
- zft_header_read &&
- zft_pos.seg_pos <= ft_first_data_segment) {
- TRACE(ft_t_noise, "you probably mixed up the zftape devices!");
- zft_reset_position(&zft_pos);
- }
- TRACE_EXIT 0;
-}
-
-/* RELEASE routine called by kernel-interface code
- */
-int _zft_close(void)
-{
- int result = 0;
- TRACE_FUN(ft_t_flow);
-
- if (zft_offline) {
- /* call the hardware release routine. Puts the drive offline */
- ftape_disable();
- TRACE_EXIT 0;
- }
- if (!(ft_write_protected || zft_old_ftape)) {
- result = zft_flush_buffers();
- TRACE(ft_t_noise, "writing file mark at current position");
- if (zft_qic_mode && zft_close_volume(&zft_pos) == 0) {
- zft_move_past_eof(&zft_pos);
- }
- if ((zft_tape_at_lbot(&zft_pos) ||
- !(zft_unit & FTAPE_NO_REWIND))) {
- if (result >= 0) {
- result = zft_update_header_segments();
- } else {
- TRACE(ft_t_err,
- "Error: unable to update header segments");
- }
- }
- }
- ftape_abort_operation();
- if (!(zft_unit & FTAPE_NO_REWIND)) {
- TRACE(ft_t_noise, "rewinding tape");
- if (ftape_seek_to_bot() < 0 && result >= 0) {
- result = -EIO; /* keep old value */
- }
- zft_reset_position(&zft_pos);
- }
- zft_zap_read_buffers();
- /* now free up memory as much as possible. We don't destroy
- * the deblock buffer if it containes a valid segment.
- */
- if (zft_deblock_segment == -1) {
- zft_vfree(&zft_deblock_buf, FT_SEGMENT_SIZE);
- }
- /* high level driver status, forces creation of a new volume
- * when calling ftape_write again and not zft_just_before_eof
- */
- zft_io_state = zft_idle;
- if (going_offline) {
- zft_init_driver();
- zft_uninit_mem();
- going_offline = 0;
- zft_offline = 1;
- } else if (zft_cmpr_lock(0 /* don't load */) == 0) {
- (*zft_cmpr_ops->reset)(); /* unlock it again */
- }
- zft_memory_stats();
- /* call the hardware release routine. Puts the drive offline */
- ftape_disable();
- TRACE_EXIT result;
-}
-
-/*
- * the wrapper function around the wrapper MTIOCTOP ioctl
- */
-static int mtioctop(struct mtop *mtop, int arg_size)
-{
- int result = 0;
- fun_entry *mt_fun_entry;
- TRACE_FUN(ft_t_flow);
-
- if (arg_size != sizeof(struct mtop) || mtop->mt_op >= NR_MT_CMDS) {
- TRACE_EXIT -EINVAL;
- }
- TRACE(ft_t_noise, "calling MTIOCTOP command: %s",
- mt_funs[mtop->mt_op].name);
- mt_fun_entry= &mt_funs[mtop->mt_op];
- zft_resid = mtop->mt_count;
- if (!mt_fun_entry->offline && zft_offline) {
- if (ft_no_tape) {
- TRACE_ABORT(-ENXIO, ft_t_info, "no tape present");
- } else {
- TRACE_ABORT(-ENXIO, ft_t_info, "drive is offline");
- }
- }
- if (!mt_fun_entry->not_formatted && !ft_formatted) {
- TRACE_ABORT(-EACCES, ft_t_info, "tape is not formatted");
- }
- if (!mt_fun_entry->write_protected) {
- TRACE_CATCH(zft_check_write_access(&zft_pos),);
- }
- if (mt_fun_entry->need_idle_state && !(zft_offline || !ft_formatted)) {
- TRACE_CATCH(zft_def_idle_state(),);
- }
- if (!zft_qic_mode && !mt_fun_entry->raw_mode) {
- TRACE_ABORT(-EACCES, ft_t_info,
-"Drive needs to be in QIC-80 compatibility mode for this command");
- }
- result = (mt_fun_entry->function)(&mtop->mt_count);
- if (zft_tape_at_lbot(&zft_pos)) {
- TRACE_CATCH(zft_update_header_segments(),);
- }
- if (result >= 0) {
- zft_resid = 0;
- }
- TRACE_EXIT result;
-}
-
-/*
- * standard MTIOCGET ioctl
- */
-static int mtiocget(struct mtget *mtget, int arg_size)
-{
- const zft_volinfo *volume;
- __s64 max_tape_pos;
- TRACE_FUN(ft_t_flow);
-
- if (arg_size != sizeof(struct mtget)) {
- TRACE_ABORT(-EINVAL, ft_t_info, "bad argument size: %d",
- arg_size);
- }
- mtget->mt_type = ft_drive_type.vendor_id + 0x800000;
- mtget->mt_dsreg = ft_last_status.space;
- mtget->mt_erreg = ft_last_error.space; /* error register */
- mtget->mt_resid = zft_resid; /* residuum of writes, reads and
- * MTIOCTOP commands
- */
- if (!zft_offline) { /* neither no_tape nor soft offline */
- mtget->mt_gstat = GMT_ONLINE(~0UL);
- /* should rather return the status of the cartridge
- * than the access mode of the file, therefor use
- * ft_write_protected, not zft_write_protected
- */
- if (ft_write_protected) {
- mtget->mt_gstat |= GMT_WR_PROT(~0UL);
- }
- if(zft_header_read) { /* this catches non-formatted */
- volume = zft_find_volume(zft_pos.seg_pos);
- mtget->mt_fileno = volume->count;
- max_tape_pos = zft_capacity - zft_blk_sz;
- if (zft_use_compression) {
- max_tape_pos -= ZFT_CMPR_OVERHEAD;
- }
- if (zft_tape_at_eod(&zft_pos)) {
- mtget->mt_gstat |= GMT_EOD(~0UL);
- }
- if (zft_pos.tape_pos > max_tape_pos) {
- mtget->mt_gstat |= GMT_EOT(~0UL);
- }
- mtget->mt_blkno = zft_div_blksz(zft_pos.volume_pos,
- volume->blk_sz);
- if (zft_just_before_eof) {
- mtget->mt_gstat |= GMT_EOF(~0UL);
- }
- if (zft_tape_at_lbot(&zft_pos)) {
- mtget->mt_gstat |= GMT_BOT(~0UL);
- }
- } else {
- mtget->mt_fileno = mtget->mt_blkno = -1;
- if (mtget->mt_dsreg & QIC_STATUS_AT_BOT) {
- mtget->mt_gstat |= GMT_BOT(~0UL);
- }
- }
- } else {
- if (ft_no_tape) {
- mtget->mt_gstat = GMT_DR_OPEN(~0UL);
- } else {
- mtget->mt_gstat = 0UL;
- }
- mtget->mt_fileno = mtget->mt_blkno = -1;
- }
- TRACE_EXIT 0;
-}
-
-#ifdef MTIOCRDFTSEG
-/*
- * Read a floppy tape segment. This is useful for manipulating the
- * volume table, and read the old header segment before re-formatting
- * the cartridge.
- */
-static int mtiocrdftseg(struct mtftseg * mtftseg, int arg_size)
-{
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "Mag tape ioctl command: MTIOCRDFTSEG");
- if (zft_qic_mode) {
- TRACE_ABORT(-EACCES, ft_t_info,
- "driver needs to be in raw mode for this ioctl");
- }
- if (arg_size != sizeof(struct mtftseg)) {
- TRACE_ABORT(-EINVAL, ft_t_info, "bad argument size: %d",
- arg_size);
- }
- if (zft_offline) {
- TRACE_EXIT -ENXIO;
- }
- if (mtftseg->mt_mode != FT_RD_SINGLE &&
- mtftseg->mt_mode != FT_RD_AHEAD) {
- TRACE_ABORT(-EINVAL, ft_t_info, "invalid read mode");
- }
- if (!ft_formatted) {
- TRACE_EXIT -EACCES; /* -ENXIO ? */
-
- }
- if (!zft_header_read) {
- TRACE_CATCH(zft_def_idle_state(),);
- }
- if (mtftseg->mt_segno > ft_last_data_segment) {
- TRACE_ABORT(-EINVAL, ft_t_info, "segment number is too large");
- }
- mtftseg->mt_result = ftape_read_segment(mtftseg->mt_segno,
- zft_deblock_buf,
- mtftseg->mt_mode);
- if (mtftseg->mt_result < 0) {
- /* a negativ result is not an ioctl error. if
- * the user wants to read damaged tapes,
- * it's up to her/him
- */
- TRACE_EXIT 0;
- }
- if (copy_to_user(mtftseg->mt_data,
- zft_deblock_buf,
- mtftseg->mt_result) != 0) {
- TRACE_EXIT -EFAULT;
- }
- TRACE_EXIT 0;
-}
-#endif
-
-#ifdef MTIOCWRFTSEG
-/*
- * write a floppy tape segment. This version features writing of
- * deleted address marks, and gracefully ignores the (software)
- * ft_formatted flag to support writing of header segments after
- * formatting.
- */
-static int mtiocwrftseg(struct mtftseg * mtftseg, int arg_size)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "Mag tape ioctl command: MTIOCWRFTSEG");
- if (zft_write_protected || zft_qic_mode) {
- TRACE_EXIT -EACCES;
- }
- if (arg_size != sizeof(struct mtftseg)) {
- TRACE_ABORT(-EINVAL, ft_t_info, "bad argument size: %d",
- arg_size);
- }
- if (zft_offline) {
- TRACE_EXIT -ENXIO;
- }
- if (mtftseg->mt_mode != FT_WR_ASYNC &&
- mtftseg->mt_mode != FT_WR_MULTI &&
- mtftseg->mt_mode != FT_WR_SINGLE &&
- mtftseg->mt_mode != FT_WR_DELETE) {
- TRACE_ABORT(-EINVAL, ft_t_info, "invalid write mode");
- }
- /*
- * We don't check for ft_formatted, because this gives
- * only the software status of the driver.
- *
- * We assume that the user knows what it is
- * doing. And rely on the low level stuff to fail
- * when the tape isn't formatted. We only make sure
- * that The header segment buffer is allocated,
- * because it holds the bad sector map.
- */
- if (zft_hseg_buf == NULL) {
- TRACE_EXIT -ENXIO;
- }
- if (mtftseg->mt_mode != FT_WR_DELETE) {
- if (copy_from_user(zft_deblock_buf,
- mtftseg->mt_data,
- FT_SEGMENT_SIZE) != 0) {
- TRACE_EXIT -EFAULT;
- }
- }
- mtftseg->mt_result = ftape_write_segment(mtftseg->mt_segno,
- zft_deblock_buf,
- mtftseg->mt_mode);
- if (mtftseg->mt_result >= 0 && mtftseg->mt_mode == FT_WR_SINGLE) {
- /*
- * a negativ result is not an ioctl error. if
- * the user wants to write damaged tapes,
- * it's up to her/him
- */
- if ((result = ftape_loop_until_writes_done()) < 0) {
- mtftseg->mt_result = result;
- }
- }
- TRACE_EXIT 0;
-}
-#endif
-
-#ifdef MTIOCVOLINFO
-/*
- * get information about volume positioned at.
- */
-static int mtiocvolinfo(struct mtvolinfo *volinfo, int arg_size)
-{
- const zft_volinfo *volume;
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "Mag tape ioctl command: MTIOCVOLINFO");
- if (arg_size != sizeof(struct mtvolinfo)) {
- TRACE_ABORT(-EINVAL,
- ft_t_info, "bad argument size: %d", arg_size);
- }
- if (zft_offline) {
- TRACE_EXIT -ENXIO;
- }
- if (!ft_formatted) {
- TRACE_EXIT -EACCES;
- }
- TRACE_CATCH(zft_def_idle_state(),);
- volume = zft_find_volume(zft_pos.seg_pos);
- volinfo->mt_volno = volume->count;
- volinfo->mt_blksz = volume->blk_sz == 1 ? 0 : volume->blk_sz;
- volinfo->mt_size = volume->size >> 10;
- volinfo->mt_rawsize = ((zft_calc_tape_pos(volume->end_seg + 1) >> 10) -
- (zft_calc_tape_pos(volume->start_seg) >> 10));
- volinfo->mt_cmpr = volume->use_compression;
- TRACE_EXIT 0;
-}
-#endif
-
-#ifdef ZFT_OBSOLETE
-static int mtioc_zftape_getblksz(struct mtblksz *blksz, int arg_size)
-{
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "\n"
- KERN_INFO "Mag tape ioctl command: MTIOC_ZTAPE_GETBLKSZ\n"
- KERN_INFO "This ioctl is here merely for compatibility.\n"
- KERN_INFO "Please use MTIOCVOLINFO instead");
- if (arg_size != sizeof(struct mtblksz)) {
- TRACE_ABORT(-EINVAL,
- ft_t_info, "bad argument size: %d", arg_size);
- }
- if (zft_offline) {
- TRACE_EXIT -ENXIO;
- }
- if (!ft_formatted) {
- TRACE_EXIT -EACCES;
- }
- TRACE_CATCH(zft_def_idle_state(),);
- blksz->mt_blksz = zft_find_volume(zft_pos.seg_pos)->blk_sz;
- TRACE_EXIT 0;
-}
-#endif
-
-#ifdef MTIOCGETSIZE
-/*
- * get the capacity of the tape cartridge.
- */
-static int mtiocgetsize(struct mttapesize *size, int arg_size)
-{
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "Mag tape ioctl command: MTIOC_ZFTAPE_GETSIZE");
- if (arg_size != sizeof(struct mttapesize)) {
- TRACE_ABORT(-EINVAL,
- ft_t_info, "bad argument size: %d", arg_size);
- }
- if (zft_offline) {
- TRACE_EXIT -ENXIO;
- }
- if (!ft_formatted) {
- TRACE_EXIT -EACCES;
- }
- TRACE_CATCH(zft_def_idle_state(),);
- size->mt_capacity = (unsigned int)(zft_capacity>>10);
- size->mt_used = (unsigned int)(zft_get_eom_pos()>>10);
- TRACE_EXIT 0;
-}
-#endif
-
-static int mtiocpos(struct mtpos *mtpos, int arg_size)
-{
- int result;
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "Mag tape ioctl command: MTIOCPOS");
- if (arg_size != sizeof(struct mtpos)) {
- TRACE_ABORT(-EINVAL,
- ft_t_info, "bad argument size: %d", arg_size);
- }
- result = mt_tell((int *)&mtpos->mt_blkno);
- TRACE_EXIT result;
-}
-
-#ifdef MTIOCFTFORMAT
-/*
- * formatting of floppy tape cartridges. This is intended to be used
- * together with the MTIOCFTCMD ioctl and the new mmap feature
- */
-
-/*
- * This function uses ftape_decode_header_segment() to inform the low
- * level ftape module about the new parameters.
- *
- * It erases the hseg_buf. The calling process must specify all
- * parameters to assure proper operation.
- *
- * return values: -EINVAL - wrong argument size
- * -EINVAL - if ftape_decode_header_segment() failed.
- */
-static int set_format_parms(struct ftfmtparms *p, __u8 *hseg_buf)
-{
- ft_trace_t old_level = TRACE_LEVEL;
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "MTIOCFTFORMAT operation FTFMT_SETPARMS");
- memset(hseg_buf, 0, FT_SEGMENT_SIZE);
- PUT4(hseg_buf, FT_SIGNATURE, FT_HSEG_MAGIC);
-
- /* fill in user specified parameters
- */
- hseg_buf[FT_FMT_CODE] = (__u8)p->ft_fmtcode;
- PUT2(hseg_buf, FT_SPT, p->ft_spt);
- hseg_buf[FT_TPC] = (__u8)p->ft_tpc;
- hseg_buf[FT_FHM] = (__u8)p->ft_fhm;
- hseg_buf[FT_FTM] = (__u8)p->ft_ftm;
-
- /* fill in sane defaults to make ftape happy.
- */
- hseg_buf[FT_FSM] = (__u8)128; /* 128 is hard wired all over ftape */
- if (p->ft_fmtcode == fmt_big) {
- PUT4(hseg_buf, FT_6_HSEG_1, 0);
- PUT4(hseg_buf, FT_6_HSEG_2, 1);
- PUT4(hseg_buf, FT_6_FRST_SEG, 2);
- PUT4(hseg_buf, FT_6_LAST_SEG, p->ft_spt * p->ft_tpc - 1);
- } else {
- PUT2(hseg_buf, FT_HSEG_1, 0);
- PUT2(hseg_buf, FT_HSEG_2, 1);
- PUT2(hseg_buf, FT_FRST_SEG, 2);
- PUT2(hseg_buf, FT_LAST_SEG, p->ft_spt * p->ft_tpc - 1);
- }
-
- /* Synchronize with the low level module. This is particularly
- * needed for unformatted cartridges as the QIC std was previously
- * unknown BUT is needed to set data rate and to calculate timeouts.
- */
- TRACE_CATCH(ftape_calibrate_data_rate(p->ft_qicstd&QIC_TAPE_STD_MASK),
- _res = -EINVAL);
-
- /* The following will also recalcualte the timeouts for the tape
- * length and QIC std we want to format to.
- * abort with -EINVAL rather than -EIO
- */
- SET_TRACE_LEVEL(ft_t_warn);
- TRACE_CATCH(ftape_decode_header_segment(hseg_buf),
- SET_TRACE_LEVEL(old_level); _res = -EINVAL);
- SET_TRACE_LEVEL(old_level);
- TRACE_EXIT 0;
-}
-
-/*
- * Return the internal SOFTWARE status of the kernel driver. This does
- * NOT query the tape drive about its status.
- */
-static int get_format_parms(struct ftfmtparms *p, __u8 *hseg_buffer)
-{
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "MTIOCFTFORMAT operation FTFMT_GETPARMS");
- p->ft_qicstd = ft_qic_std;
- p->ft_fmtcode = ft_format_code;
- p->ft_fhm = hseg_buffer[FT_FHM];
- p->ft_ftm = hseg_buffer[FT_FTM];
- p->ft_spt = ft_segments_per_track;
- p->ft_tpc = ft_tracks_per_tape;
- TRACE_EXIT 0;
-}
-
-static int mtiocftformat(struct mtftformat *mtftformat, int arg_size)
-{
- int result;
- union fmt_arg *arg = &mtftformat->fmt_arg;
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "Mag tape ioctl command: MTIOCFTFORMAT");
- if (zft_offline) {
- if (ft_no_tape) {
- TRACE_ABORT(-ENXIO, ft_t_info, "no tape present");
- } else {
- TRACE_ABORT(-ENXIO, ft_t_info, "drive is offline");
- }
- }
- if (zft_qic_mode) {
- TRACE_ABORT(-EACCES, ft_t_info,
- "driver needs to be in raw mode for this ioctl");
- }
- if (zft_hseg_buf == NULL) {
- TRACE_CATCH(zft_vcalloc_once(&zft_hseg_buf, FT_SEGMENT_SIZE),);
- }
- zft_header_read = 0;
- switch(mtftformat->fmt_op) {
- case FTFMT_SET_PARMS:
- TRACE_CATCH(set_format_parms(&arg->fmt_parms, zft_hseg_buf),);
- TRACE_EXIT 0;
- case FTFMT_GET_PARMS:
- TRACE_CATCH(get_format_parms(&arg->fmt_parms, zft_hseg_buf),);
- TRACE_EXIT 0;
- case FTFMT_FORMAT_TRACK:
- if ((ft_formatted && zft_check_write_access(&zft_pos) < 0) ||
- (!ft_formatted && zft_write_protected)) {
- TRACE_ABORT(-EACCES, ft_t_info, "Write access denied");
- }
- TRACE_CATCH(ftape_format_track(arg->fmt_track.ft_track,
- arg->fmt_track.ft_gap3),);
- TRACE_EXIT 0;
- case FTFMT_STATUS:
- TRACE_CATCH(ftape_format_status(&arg->fmt_status.ft_segment),);
- TRACE_EXIT 0;
- case FTFMT_VERIFY:
- TRACE_CATCH(ftape_verify_segment(arg->fmt_verify.ft_segment,
- (SectorMap *)&arg->fmt_verify.ft_bsm),);
- TRACE_EXIT 0;
- default:
- TRACE_ABORT(-EINVAL, ft_t_err, "Invalid format operation");
- }
- TRACE_EXIT result;
-}
-#endif
-
-#ifdef MTIOCFTCMD
-/*
- * send a QIC-117 command to the drive, with optional timeouts,
- * parameter and result bits. This is intended to be used together
- * with the formatting ioctl.
- */
-static int mtiocftcmd(struct mtftcmd *ftcmd, int arg_size)
-{
- int i;
- TRACE_FUN(ft_t_flow);
-
- TRACE(ft_t_noise, "Mag tape ioctl command: MTIOCFTCMD");
- if (!capable(CAP_SYS_ADMIN)) {
- TRACE_ABORT(-EPERM, ft_t_info,
- "need CAP_SYS_ADMIN capability to send raw qic-117 commands");
- }
- if (zft_qic_mode) {
- TRACE_ABORT(-EACCES, ft_t_info,
- "driver needs to be in raw mode for this ioctl");
- }
- if (arg_size != sizeof(struct mtftcmd)) {
- TRACE_ABORT(-EINVAL,
- ft_t_info, "bad argument size: %d", arg_size);
- }
- if (ftcmd->ft_wait_before) {
- TRACE_CATCH(ftape_ready_wait(ftcmd->ft_wait_before,
- &ftcmd->ft_status),);
- }
- if (ftcmd->ft_status & QIC_STATUS_ERROR)
- goto ftmtcmd_error;
- if (ftcmd->ft_result_bits != 0) {
- TRACE_CATCH(ftape_report_operation(&ftcmd->ft_result,
- ftcmd->ft_cmd,
- ftcmd->ft_result_bits),);
- } else {
- TRACE_CATCH(ftape_command(ftcmd->ft_cmd),);
- if (ftcmd->ft_status & QIC_STATUS_ERROR)
- goto ftmtcmd_error;
- for (i = 0; i < ftcmd->ft_parm_cnt; i++) {
- TRACE_CATCH(ftape_parameter(ftcmd->ft_parms[i]&0x0f),);
- if (ftcmd->ft_status & QIC_STATUS_ERROR)
- goto ftmtcmd_error;
- }
- }
- if (ftcmd->ft_wait_after != 0) {
- TRACE_CATCH(ftape_ready_wait(ftcmd->ft_wait_after,
- &ftcmd->ft_status),);
- }
-ftmtcmd_error:
- if (ftcmd->ft_status & QIC_STATUS_ERROR) {
- TRACE(ft_t_noise, "error status set");
- TRACE_CATCH(ftape_report_error(&ftcmd->ft_error,
- &ftcmd->ft_cmd, 1),);
- }
- TRACE_EXIT 0; /* this is not an i/o error */
-}
-#endif
-
-/* IOCTL routine called by kernel-interface code
- */
-int _zft_ioctl(unsigned int command, void __user * arg)
-{
- int result;
- union { struct mtop mtop;
- struct mtget mtget;
- struct mtpos mtpos;
-#ifdef MTIOCRDFTSEG
- struct mtftseg mtftseg;
-#endif
-#ifdef MTIOCVOLINFO
- struct mtvolinfo mtvolinfo;
-#endif
-#ifdef MTIOCGETSIZE
- struct mttapesize mttapesize;
-#endif
-#ifdef MTIOCFTFORMAT
- struct mtftformat mtftformat;
-#endif
-#ifdef ZFT_OBSOLETE
- struct mtblksz mtblksz;
-#endif
-#ifdef MTIOCFTCMD
- struct mtftcmd mtftcmd;
-#endif
- } krnl_arg;
- int arg_size = _IOC_SIZE(command);
- int dir = _IOC_DIR(command);
- TRACE_FUN(ft_t_flow);
-
- /* This check will only catch arguments that are too large !
- */
- if (dir & (_IOC_READ | _IOC_WRITE) && arg_size > sizeof(krnl_arg)) {
- TRACE_ABORT(-EINVAL,
- ft_t_info, "bad argument size: %d", arg_size);
- }
- if (dir & _IOC_WRITE) {
- if (copy_from_user(&krnl_arg, arg, arg_size) != 0) {
- TRACE_EXIT -EFAULT;
- }
- }
- TRACE(ft_t_flow, "called with ioctl command: 0x%08x", command);
- switch (command) {
- case MTIOCTOP:
- result = mtioctop(&krnl_arg.mtop, arg_size);
- break;
- case MTIOCGET:
- result = mtiocget(&krnl_arg.mtget, arg_size);
- break;
- case MTIOCPOS:
- result = mtiocpos(&krnl_arg.mtpos, arg_size);
- break;
-#ifdef MTIOCVOLINFO
- case MTIOCVOLINFO:
- result = mtiocvolinfo(&krnl_arg.mtvolinfo, arg_size);
- break;
-#endif
-#ifdef ZFT_OBSOLETE
- case MTIOC_ZFTAPE_GETBLKSZ:
- result = mtioc_zftape_getblksz(&krnl_arg.mtblksz, arg_size);
- break;
-#endif
-#ifdef MTIOCRDFTSEG
- case MTIOCRDFTSEG: /* read a segment via ioctl */
- result = mtiocrdftseg(&krnl_arg.mtftseg, arg_size);
- break;
-#endif
-#ifdef MTIOCWRFTSEG
- case MTIOCWRFTSEG: /* write a segment via ioctl */
- result = mtiocwrftseg(&krnl_arg.mtftseg, arg_size);
- break;
-#endif
-#ifdef MTIOCGETSIZE
- case MTIOCGETSIZE:
- result = mtiocgetsize(&krnl_arg.mttapesize, arg_size);
- break;
-#endif
-#ifdef MTIOCFTFORMAT
- case MTIOCFTFORMAT:
- result = mtiocftformat(&krnl_arg.mtftformat, arg_size);
- break;
-#endif
-#ifdef MTIOCFTCMD
- case MTIOCFTCMD:
- result = mtiocftcmd(&krnl_arg.mtftcmd, arg_size);
- break;
-#endif
- default:
- result = -EINVAL;
- break;
- }
- if ((result >= 0) && (dir & _IOC_READ)) {
- if (copy_to_user(arg, &krnl_arg, arg_size) != 0) {
- TRACE_EXIT -EFAULT;
- }
- }
- TRACE_EXIT result;
-}
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