(2006-08-06) rescue-bootcd
This commit is contained in:
579
extra/linux-2.6.10/drivers/block/scsi_ioctl.c
Normal file
579
extra/linux-2.6.10/drivers/block/scsi_ioctl.c
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@@ -0,0 +1,579 @@
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/*
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* Copyright (C) 2001 Jens Axboe <axboe@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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*
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public Licens
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/module.h>
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#include <linux/blkdev.h>
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#include <linux/completion.h>
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#include <linux/cdrom.h>
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#include <linux/slab.h>
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#include <linux/times.h>
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#include <asm/uaccess.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_ioctl.h>
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#include <scsi/scsi_cmnd.h>
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/* Command group 3 is reserved and should never be used. */
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const unsigned char scsi_command_size[8] =
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{
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6, 10, 10, 12,
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16, 12, 10, 10
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};
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EXPORT_SYMBOL(scsi_command_size);
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#define BLK_DEFAULT_TIMEOUT (60 * HZ)
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#include <scsi/sg.h>
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static int sg_get_version(int __user *p)
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{
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static int sg_version_num = 30527;
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return put_user(sg_version_num, p);
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}
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static int scsi_get_idlun(request_queue_t *q, int __user *p)
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{
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return put_user(0, p);
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}
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static int scsi_get_bus(request_queue_t *q, int __user *p)
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{
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return put_user(0, p);
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}
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static int sg_get_timeout(request_queue_t *q)
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{
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return q->sg_timeout / (HZ / USER_HZ);
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}
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static int sg_set_timeout(request_queue_t *q, int __user *p)
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{
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int timeout, err = get_user(timeout, p);
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if (!err)
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q->sg_timeout = timeout * (HZ / USER_HZ);
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return err;
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}
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static int sg_get_reserved_size(request_queue_t *q, int __user *p)
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{
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return put_user(q->sg_reserved_size, p);
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}
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static int sg_set_reserved_size(request_queue_t *q, int __user *p)
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{
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int size, err = get_user(size, p);
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if (err)
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return err;
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if (size < 0)
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return -EINVAL;
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if (size > (q->max_sectors << 9))
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size = q->max_sectors << 9;
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q->sg_reserved_size = size;
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return 0;
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}
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/*
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* will always return that we are ATAPI even for a real SCSI drive, I'm not
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* so sure this is worth doing anything about (why would you care??)
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*/
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static int sg_emulated_host(request_queue_t *q, int __user *p)
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{
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return put_user(1, p);
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}
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#define CMD_READ_SAFE 0x01
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#define CMD_WRITE_SAFE 0x02
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#define CMD_WARNED 0x04
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#define safe_for_read(cmd) [cmd] = CMD_READ_SAFE
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#define safe_for_write(cmd) [cmd] = CMD_WRITE_SAFE
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static int verify_command(struct file *file, unsigned char *cmd)
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{
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static unsigned char cmd_type[256] = {
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/* Basic read-only commands */
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safe_for_read(TEST_UNIT_READY),
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safe_for_read(REQUEST_SENSE),
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safe_for_read(READ_6),
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safe_for_read(READ_10),
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safe_for_read(READ_12),
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safe_for_read(READ_16),
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safe_for_read(READ_BUFFER),
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safe_for_read(READ_LONG),
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safe_for_read(INQUIRY),
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safe_for_read(MODE_SENSE),
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safe_for_read(MODE_SENSE_10),
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safe_for_read(LOG_SENSE),
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safe_for_read(START_STOP),
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safe_for_read(GPCMD_VERIFY_10),
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safe_for_read(VERIFY_16),
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/* Audio CD commands */
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safe_for_read(GPCMD_PLAY_CD),
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safe_for_read(GPCMD_PLAY_AUDIO_10),
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safe_for_read(GPCMD_PLAY_AUDIO_MSF),
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safe_for_read(GPCMD_PLAY_AUDIO_TI),
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safe_for_read(GPCMD_PAUSE_RESUME),
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/* CD/DVD data reading */
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safe_for_read(GPCMD_READ_BUFFER_CAPACITY),
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safe_for_read(GPCMD_READ_CD),
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safe_for_read(GPCMD_READ_CD_MSF),
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safe_for_read(GPCMD_READ_DISC_INFO),
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safe_for_read(GPCMD_READ_CDVD_CAPACITY),
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safe_for_read(GPCMD_READ_DVD_STRUCTURE),
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safe_for_read(GPCMD_READ_HEADER),
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safe_for_read(GPCMD_READ_TRACK_RZONE_INFO),
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safe_for_read(GPCMD_READ_SUBCHANNEL),
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safe_for_read(GPCMD_READ_TOC_PMA_ATIP),
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safe_for_read(GPCMD_REPORT_KEY),
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safe_for_read(GPCMD_SCAN),
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safe_for_read(GPCMD_GET_CONFIGURATION),
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safe_for_read(GPCMD_READ_FORMAT_CAPACITIES),
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safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION),
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safe_for_read(GPCMD_GET_PERFORMANCE),
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safe_for_read(GPCMD_SEEK),
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safe_for_read(GPCMD_STOP_PLAY_SCAN),
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/* Basic writing commands */
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safe_for_write(WRITE_6),
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safe_for_write(WRITE_10),
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safe_for_write(WRITE_VERIFY),
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safe_for_write(WRITE_12),
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safe_for_write(WRITE_VERIFY_12),
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safe_for_write(WRITE_16),
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safe_for_write(WRITE_LONG),
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safe_for_write(ERASE),
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safe_for_write(GPCMD_MODE_SELECT_10),
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safe_for_write(MODE_SELECT),
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safe_for_write(LOG_SELECT),
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safe_for_write(GPCMD_BLANK),
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safe_for_write(GPCMD_CLOSE_TRACK),
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safe_for_write(GPCMD_FLUSH_CACHE),
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safe_for_write(GPCMD_FORMAT_UNIT),
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safe_for_write(GPCMD_REPAIR_RZONE_TRACK),
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safe_for_write(GPCMD_RESERVE_RZONE_TRACK),
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safe_for_write(GPCMD_SEND_DVD_STRUCTURE),
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safe_for_write(GPCMD_SEND_EVENT),
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safe_for_write(GPCMD_SEND_KEY),
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safe_for_write(GPCMD_SEND_OPC),
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safe_for_write(GPCMD_SEND_CUE_SHEET),
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safe_for_write(GPCMD_SET_SPEED),
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safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL),
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safe_for_write(GPCMD_LOAD_UNLOAD),
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safe_for_write(GPCMD_SET_STREAMING),
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};
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unsigned char type = cmd_type[cmd[0]];
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/* Anybody who can open the device can do a read-safe command */
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if (type & CMD_READ_SAFE)
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return 0;
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/* Write-safe commands just require a writable open.. */
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if (type & CMD_WRITE_SAFE) {
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if (file->f_mode & FMODE_WRITE)
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return 0;
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}
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if (!(type & CMD_WARNED)) {
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cmd_type[cmd[0]] = CMD_WARNED;
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printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
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}
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/* And root can do any command.. */
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if (capable(CAP_SYS_RAWIO))
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return 0;
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/* Otherwise fail it with an "Operation not permitted" */
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return -EPERM;
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}
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static int sg_io(struct file *file, request_queue_t *q,
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struct gendisk *bd_disk, struct sg_io_hdr *hdr)
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{
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unsigned long start_time;
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int reading, writing;
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struct request *rq;
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struct bio *bio;
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char sense[SCSI_SENSE_BUFFERSIZE];
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unsigned char cmd[BLK_MAX_CDB];
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if (hdr->interface_id != 'S')
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return -EINVAL;
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if (hdr->cmd_len > BLK_MAX_CDB)
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return -EINVAL;
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if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
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return -EFAULT;
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if (verify_command(file, cmd))
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return -EPERM;
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/*
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* we'll do that later
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*/
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if (hdr->iovec_count)
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return -EOPNOTSUPP;
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if (hdr->dxfer_len > (q->max_sectors << 9))
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return -EIO;
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reading = writing = 0;
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if (hdr->dxfer_len) {
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switch (hdr->dxfer_direction) {
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default:
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return -EINVAL;
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case SG_DXFER_TO_FROM_DEV:
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reading = 1;
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/* fall through */
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case SG_DXFER_TO_DEV:
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writing = 1;
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break;
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case SG_DXFER_FROM_DEV:
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reading = 1;
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break;
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}
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rq = blk_rq_map_user(q, writing ? WRITE : READ, hdr->dxferp,
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hdr->dxfer_len);
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if (IS_ERR(rq))
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return PTR_ERR(rq);
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} else
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rq = blk_get_request(q, READ, __GFP_WAIT);
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/*
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* fill in request structure
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*/
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rq->cmd_len = hdr->cmd_len;
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memcpy(rq->cmd, cmd, hdr->cmd_len);
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if (sizeof(rq->cmd) != hdr->cmd_len)
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memset(rq->cmd + hdr->cmd_len, 0, sizeof(rq->cmd) - hdr->cmd_len);
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memset(sense, 0, sizeof(sense));
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rq->sense = sense;
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rq->sense_len = 0;
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rq->flags |= REQ_BLOCK_PC;
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bio = rq->bio;
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/*
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* bounce this after holding a reference to the original bio, it's
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* needed for proper unmapping
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*/
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if (rq->bio)
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blk_queue_bounce(q, &rq->bio);
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rq->timeout = (hdr->timeout * HZ) / 1000;
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if (!rq->timeout)
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rq->timeout = q->sg_timeout;
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if (!rq->timeout)
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rq->timeout = BLK_DEFAULT_TIMEOUT;
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start_time = jiffies;
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||||
/* ignore return value. All information is passed back to caller
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* (if he doesn't check that is his problem).
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* N.B. a non-zero SCSI status is _not_ necessarily an error.
|
||||
*/
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blk_execute_rq(q, bd_disk, rq);
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/* write to all output members */
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hdr->status = 0xff & rq->errors;
|
||||
hdr->masked_status = status_byte(rq->errors);
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hdr->msg_status = msg_byte(rq->errors);
|
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hdr->host_status = host_byte(rq->errors);
|
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hdr->driver_status = driver_byte(rq->errors);
|
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hdr->info = 0;
|
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if (hdr->masked_status || hdr->host_status || hdr->driver_status)
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hdr->info |= SG_INFO_CHECK;
|
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hdr->resid = rq->data_len;
|
||||
hdr->duration = ((jiffies - start_time) * 1000) / HZ;
|
||||
hdr->sb_len_wr = 0;
|
||||
|
||||
if (rq->sense_len && hdr->sbp) {
|
||||
int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
|
||||
|
||||
if (!copy_to_user(hdr->sbp, rq->sense, len))
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||||
hdr->sb_len_wr = len;
|
||||
}
|
||||
|
||||
if (blk_rq_unmap_user(rq, bio, hdr->dxfer_len))
|
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return -EFAULT;
|
||||
|
||||
/* may not have succeeded, but output values written to control
|
||||
* structure (struct sg_io_hdr). */
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
|
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#define START_STOP_TIMEOUT (60 * HZ)
|
||||
#define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
|
||||
#define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
|
||||
#define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
|
||||
#define OMAX_SB_LEN 16 /* For backward compatibility */
|
||||
|
||||
static int sg_scsi_ioctl(struct file *file, request_queue_t *q,
|
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struct gendisk *bd_disk, Scsi_Ioctl_Command __user *sic)
|
||||
{
|
||||
struct request *rq;
|
||||
int err, in_len, out_len, bytes, opcode, cmdlen;
|
||||
char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
|
||||
|
||||
/*
|
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* get in an out lengths, verify they don't exceed a page worth of data
|
||||
*/
|
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if (get_user(in_len, &sic->inlen))
|
||||
return -EFAULT;
|
||||
if (get_user(out_len, &sic->outlen))
|
||||
return -EFAULT;
|
||||
if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
|
||||
return -EINVAL;
|
||||
if (get_user(opcode, sic->data))
|
||||
return -EFAULT;
|
||||
|
||||
bytes = max(in_len, out_len);
|
||||
if (bytes) {
|
||||
buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER);
|
||||
if (!buffer)
|
||||
return -ENOMEM;
|
||||
|
||||
memset(buffer, 0, bytes);
|
||||
}
|
||||
|
||||
rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
|
||||
|
||||
cmdlen = COMMAND_SIZE(opcode);
|
||||
|
||||
/*
|
||||
* get command and data to send to device, if any
|
||||
*/
|
||||
err = -EFAULT;
|
||||
rq->cmd_len = cmdlen;
|
||||
if (copy_from_user(rq->cmd, sic->data, cmdlen))
|
||||
goto error;
|
||||
|
||||
if (copy_from_user(buffer, sic->data + cmdlen, in_len))
|
||||
goto error;
|
||||
|
||||
err = verify_command(file, rq->cmd);
|
||||
if (err)
|
||||
goto error;
|
||||
|
||||
switch (opcode) {
|
||||
case SEND_DIAGNOSTIC:
|
||||
case FORMAT_UNIT:
|
||||
rq->timeout = FORMAT_UNIT_TIMEOUT;
|
||||
break;
|
||||
case START_STOP:
|
||||
rq->timeout = START_STOP_TIMEOUT;
|
||||
break;
|
||||
case MOVE_MEDIUM:
|
||||
rq->timeout = MOVE_MEDIUM_TIMEOUT;
|
||||
break;
|
||||
case READ_ELEMENT_STATUS:
|
||||
rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
|
||||
break;
|
||||
case READ_DEFECT_DATA:
|
||||
rq->timeout = READ_DEFECT_DATA_TIMEOUT;
|
||||
break;
|
||||
default:
|
||||
rq->timeout = BLK_DEFAULT_TIMEOUT;
|
||||
break;
|
||||
}
|
||||
|
||||
memset(sense, 0, sizeof(sense));
|
||||
rq->sense = sense;
|
||||
rq->sense_len = 0;
|
||||
|
||||
rq->data = buffer;
|
||||
rq->data_len = bytes;
|
||||
rq->flags |= REQ_BLOCK_PC;
|
||||
|
||||
blk_execute_rq(q, bd_disk, rq);
|
||||
err = rq->errors & 0xff; /* only 8 bit SCSI status */
|
||||
if (err) {
|
||||
if (rq->sense_len && rq->sense) {
|
||||
bytes = (OMAX_SB_LEN > rq->sense_len) ?
|
||||
rq->sense_len : OMAX_SB_LEN;
|
||||
if (copy_to_user(sic->data, rq->sense, bytes))
|
||||
err = -EFAULT;
|
||||
}
|
||||
} else {
|
||||
if (copy_to_user(sic->data, buffer, out_len))
|
||||
err = -EFAULT;
|
||||
}
|
||||
|
||||
error:
|
||||
kfree(buffer);
|
||||
blk_put_request(rq);
|
||||
return err;
|
||||
}
|
||||
|
||||
int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
|
||||
{
|
||||
request_queue_t *q;
|
||||
struct request *rq;
|
||||
int close = 0, err;
|
||||
|
||||
q = bd_disk->queue;
|
||||
if (!q)
|
||||
return -ENXIO;
|
||||
|
||||
if (blk_get_queue(q))
|
||||
return -ENXIO;
|
||||
|
||||
switch (cmd) {
|
||||
/*
|
||||
* new sgv3 interface
|
||||
*/
|
||||
case SG_GET_VERSION_NUM:
|
||||
err = sg_get_version(arg);
|
||||
break;
|
||||
case SCSI_IOCTL_GET_IDLUN:
|
||||
err = scsi_get_idlun(q, arg);
|
||||
break;
|
||||
case SCSI_IOCTL_GET_BUS_NUMBER:
|
||||
err = scsi_get_bus(q, arg);
|
||||
break;
|
||||
case SG_SET_TIMEOUT:
|
||||
err = sg_set_timeout(q, arg);
|
||||
break;
|
||||
case SG_GET_TIMEOUT:
|
||||
err = sg_get_timeout(q);
|
||||
break;
|
||||
case SG_GET_RESERVED_SIZE:
|
||||
err = sg_get_reserved_size(q, arg);
|
||||
break;
|
||||
case SG_SET_RESERVED_SIZE:
|
||||
err = sg_set_reserved_size(q, arg);
|
||||
break;
|
||||
case SG_EMULATED_HOST:
|
||||
err = sg_emulated_host(q, arg);
|
||||
break;
|
||||
case SG_IO: {
|
||||
struct sg_io_hdr hdr;
|
||||
|
||||
err = -EFAULT;
|
||||
if (copy_from_user(&hdr, arg, sizeof(hdr)))
|
||||
break;
|
||||
err = sg_io(file, q, bd_disk, &hdr);
|
||||
if (err == -EFAULT)
|
||||
break;
|
||||
|
||||
if (copy_to_user(arg, &hdr, sizeof(hdr)))
|
||||
err = -EFAULT;
|
||||
break;
|
||||
}
|
||||
case CDROM_SEND_PACKET: {
|
||||
struct cdrom_generic_command cgc;
|
||||
struct sg_io_hdr hdr;
|
||||
|
||||
err = -EFAULT;
|
||||
if (copy_from_user(&cgc, arg, sizeof(cgc)))
|
||||
break;
|
||||
cgc.timeout = clock_t_to_jiffies(cgc.timeout);
|
||||
memset(&hdr, 0, sizeof(hdr));
|
||||
hdr.interface_id = 'S';
|
||||
hdr.cmd_len = sizeof(cgc.cmd);
|
||||
hdr.dxfer_len = cgc.buflen;
|
||||
err = 0;
|
||||
switch (cgc.data_direction) {
|
||||
case CGC_DATA_UNKNOWN:
|
||||
hdr.dxfer_direction = SG_DXFER_UNKNOWN;
|
||||
break;
|
||||
case CGC_DATA_WRITE:
|
||||
hdr.dxfer_direction = SG_DXFER_TO_DEV;
|
||||
break;
|
||||
case CGC_DATA_READ:
|
||||
hdr.dxfer_direction = SG_DXFER_FROM_DEV;
|
||||
break;
|
||||
case CGC_DATA_NONE:
|
||||
hdr.dxfer_direction = SG_DXFER_NONE;
|
||||
break;
|
||||
default:
|
||||
err = -EINVAL;
|
||||
}
|
||||
if (err)
|
||||
break;
|
||||
|
||||
hdr.dxferp = cgc.buffer;
|
||||
hdr.sbp = cgc.sense;
|
||||
if (hdr.sbp)
|
||||
hdr.mx_sb_len = sizeof(struct request_sense);
|
||||
hdr.timeout = cgc.timeout;
|
||||
hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
|
||||
hdr.cmd_len = sizeof(cgc.cmd);
|
||||
|
||||
err = sg_io(file, q, bd_disk, &hdr);
|
||||
if (err == -EFAULT)
|
||||
break;
|
||||
|
||||
if (hdr.status)
|
||||
err = -EIO;
|
||||
|
||||
cgc.stat = err;
|
||||
cgc.buflen = hdr.resid;
|
||||
if (copy_to_user(arg, &cgc, sizeof(cgc)))
|
||||
err = -EFAULT;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* old junk scsi send command ioctl
|
||||
*/
|
||||
case SCSI_IOCTL_SEND_COMMAND:
|
||||
printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
|
||||
err = -EINVAL;
|
||||
if (!arg)
|
||||
break;
|
||||
|
||||
err = sg_scsi_ioctl(file, q, bd_disk, arg);
|
||||
break;
|
||||
case CDROMCLOSETRAY:
|
||||
close = 1;
|
||||
case CDROMEJECT:
|
||||
rq = blk_get_request(q, WRITE, __GFP_WAIT);
|
||||
rq->flags |= REQ_BLOCK_PC;
|
||||
rq->data = NULL;
|
||||
rq->data_len = 0;
|
||||
rq->timeout = BLK_DEFAULT_TIMEOUT;
|
||||
memset(rq->cmd, 0, sizeof(rq->cmd));
|
||||
rq->cmd[0] = GPCMD_START_STOP_UNIT;
|
||||
rq->cmd[4] = 0x02 + (close != 0);
|
||||
rq->cmd_len = 6;
|
||||
err = blk_execute_rq(q, bd_disk, rq);
|
||||
blk_put_request(rq);
|
||||
break;
|
||||
default:
|
||||
err = -ENOTTY;
|
||||
}
|
||||
|
||||
blk_put_queue(q);
|
||||
return err;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(scsi_cmd_ioctl);
|
||||
Reference in New Issue
Block a user