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![Christoph Hellwig](/assets/img/avatar_default.png)
All these files have some form of the usual GPLv2 boilerplate. Switch them to use SPDX tags instead. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
720 lines
18 KiB
C
720 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2001 Jens Axboe <axboe@suse.de>
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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/capability.h>
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#include <linux/completion.h>
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#include <linux/cdrom.h>
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#include <linux/ratelimit.h>
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#include <linux/slab.h>
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#include <linux/times.h>
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#include <linux/uio.h>
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#include <linux/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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struct blk_cmd_filter {
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unsigned long read_ok[BLK_SCSI_CMD_PER_LONG];
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unsigned long write_ok[BLK_SCSI_CMD_PER_LONG];
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};
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static struct blk_cmd_filter blk_default_cmd_filter;
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/* Command group 3 is reserved and should never be used. */
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const unsigned char scsi_command_size_tbl[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_tbl);
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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 const 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(struct request_queue *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(struct request_queue *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(struct request_queue *q)
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{
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return jiffies_to_clock_t(q->sg_timeout);
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}
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static int sg_set_timeout(struct request_queue *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 = clock_t_to_jiffies(timeout);
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return err;
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}
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static int max_sectors_bytes(struct request_queue *q)
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{
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unsigned int max_sectors = queue_max_sectors(q);
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max_sectors = min_t(unsigned int, max_sectors, INT_MAX >> 9);
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return max_sectors << 9;
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}
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static int sg_get_reserved_size(struct request_queue *q, int __user *p)
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{
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int val = min_t(int, q->sg_reserved_size, max_sectors_bytes(q));
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return put_user(val, p);
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}
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static int sg_set_reserved_size(struct request_queue *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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q->sg_reserved_size = min(size, max_sectors_bytes(q));
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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(struct request_queue *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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static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
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{
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/* Basic read-only commands */
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__set_bit(TEST_UNIT_READY, filter->read_ok);
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__set_bit(REQUEST_SENSE, filter->read_ok);
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__set_bit(READ_6, filter->read_ok);
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__set_bit(READ_10, filter->read_ok);
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__set_bit(READ_12, filter->read_ok);
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__set_bit(READ_16, filter->read_ok);
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__set_bit(READ_BUFFER, filter->read_ok);
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__set_bit(READ_DEFECT_DATA, filter->read_ok);
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__set_bit(READ_CAPACITY, filter->read_ok);
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__set_bit(READ_LONG, filter->read_ok);
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__set_bit(INQUIRY, filter->read_ok);
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__set_bit(MODE_SENSE, filter->read_ok);
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__set_bit(MODE_SENSE_10, filter->read_ok);
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__set_bit(LOG_SENSE, filter->read_ok);
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__set_bit(START_STOP, filter->read_ok);
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__set_bit(GPCMD_VERIFY_10, filter->read_ok);
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__set_bit(VERIFY_16, filter->read_ok);
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__set_bit(REPORT_LUNS, filter->read_ok);
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__set_bit(SERVICE_ACTION_IN_16, filter->read_ok);
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__set_bit(RECEIVE_DIAGNOSTIC, filter->read_ok);
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__set_bit(MAINTENANCE_IN, filter->read_ok);
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__set_bit(GPCMD_READ_BUFFER_CAPACITY, filter->read_ok);
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/* Audio CD commands */
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__set_bit(GPCMD_PLAY_CD, filter->read_ok);
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__set_bit(GPCMD_PLAY_AUDIO_10, filter->read_ok);
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__set_bit(GPCMD_PLAY_AUDIO_MSF, filter->read_ok);
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__set_bit(GPCMD_PLAY_AUDIO_TI, filter->read_ok);
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__set_bit(GPCMD_PAUSE_RESUME, filter->read_ok);
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/* CD/DVD data reading */
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__set_bit(GPCMD_READ_CD, filter->read_ok);
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__set_bit(GPCMD_READ_CD_MSF, filter->read_ok);
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__set_bit(GPCMD_READ_DISC_INFO, filter->read_ok);
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__set_bit(GPCMD_READ_CDVD_CAPACITY, filter->read_ok);
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__set_bit(GPCMD_READ_DVD_STRUCTURE, filter->read_ok);
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__set_bit(GPCMD_READ_HEADER, filter->read_ok);
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__set_bit(GPCMD_READ_TRACK_RZONE_INFO, filter->read_ok);
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__set_bit(GPCMD_READ_SUBCHANNEL, filter->read_ok);
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__set_bit(GPCMD_READ_TOC_PMA_ATIP, filter->read_ok);
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__set_bit(GPCMD_REPORT_KEY, filter->read_ok);
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__set_bit(GPCMD_SCAN, filter->read_ok);
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__set_bit(GPCMD_GET_CONFIGURATION, filter->read_ok);
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__set_bit(GPCMD_READ_FORMAT_CAPACITIES, filter->read_ok);
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__set_bit(GPCMD_GET_EVENT_STATUS_NOTIFICATION, filter->read_ok);
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__set_bit(GPCMD_GET_PERFORMANCE, filter->read_ok);
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__set_bit(GPCMD_SEEK, filter->read_ok);
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__set_bit(GPCMD_STOP_PLAY_SCAN, filter->read_ok);
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/* Basic writing commands */
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__set_bit(WRITE_6, filter->write_ok);
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__set_bit(WRITE_10, filter->write_ok);
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__set_bit(WRITE_VERIFY, filter->write_ok);
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__set_bit(WRITE_12, filter->write_ok);
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__set_bit(WRITE_VERIFY_12, filter->write_ok);
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__set_bit(WRITE_16, filter->write_ok);
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__set_bit(WRITE_LONG, filter->write_ok);
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__set_bit(WRITE_LONG_2, filter->write_ok);
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__set_bit(WRITE_SAME, filter->write_ok);
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__set_bit(WRITE_SAME_16, filter->write_ok);
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__set_bit(WRITE_SAME_32, filter->write_ok);
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__set_bit(ERASE, filter->write_ok);
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__set_bit(GPCMD_MODE_SELECT_10, filter->write_ok);
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__set_bit(MODE_SELECT, filter->write_ok);
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__set_bit(LOG_SELECT, filter->write_ok);
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__set_bit(GPCMD_BLANK, filter->write_ok);
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__set_bit(GPCMD_CLOSE_TRACK, filter->write_ok);
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__set_bit(GPCMD_FLUSH_CACHE, filter->write_ok);
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__set_bit(GPCMD_FORMAT_UNIT, filter->write_ok);
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__set_bit(GPCMD_REPAIR_RZONE_TRACK, filter->write_ok);
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__set_bit(GPCMD_RESERVE_RZONE_TRACK, filter->write_ok);
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__set_bit(GPCMD_SEND_DVD_STRUCTURE, filter->write_ok);
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__set_bit(GPCMD_SEND_EVENT, filter->write_ok);
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__set_bit(GPCMD_SEND_KEY, filter->write_ok);
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__set_bit(GPCMD_SEND_OPC, filter->write_ok);
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__set_bit(GPCMD_SEND_CUE_SHEET, filter->write_ok);
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__set_bit(GPCMD_SET_SPEED, filter->write_ok);
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__set_bit(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL, filter->write_ok);
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__set_bit(GPCMD_LOAD_UNLOAD, filter->write_ok);
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__set_bit(GPCMD_SET_STREAMING, filter->write_ok);
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__set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
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}
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int blk_verify_command(unsigned char *cmd, fmode_t mode)
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{
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struct blk_cmd_filter *filter = &blk_default_cmd_filter;
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/* root can do any command. */
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if (capable(CAP_SYS_RAWIO))
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return 0;
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/* Anybody who can open the device can do a read-safe command */
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if (test_bit(cmd[0], filter->read_ok))
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return 0;
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/* Write-safe commands require a writable open */
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if (test_bit(cmd[0], filter->write_ok) && (mode & FMODE_WRITE))
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return 0;
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return -EPERM;
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}
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EXPORT_SYMBOL(blk_verify_command);
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static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
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struct sg_io_hdr *hdr, fmode_t mode)
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{
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struct scsi_request *req = scsi_req(rq);
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if (copy_from_user(req->cmd, hdr->cmdp, hdr->cmd_len))
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return -EFAULT;
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if (blk_verify_command(req->cmd, mode))
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return -EPERM;
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/*
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* fill in request structure
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*/
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req->cmd_len = hdr->cmd_len;
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rq->timeout = msecs_to_jiffies(hdr->timeout);
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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_SG_TIMEOUT;
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if (rq->timeout < BLK_MIN_SG_TIMEOUT)
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rq->timeout = BLK_MIN_SG_TIMEOUT;
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return 0;
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}
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static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
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struct bio *bio)
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{
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struct scsi_request *req = scsi_req(rq);
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int r, ret = 0;
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/*
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* fill in all the output members
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*/
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hdr->status = req->result & 0xff;
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hdr->masked_status = status_byte(req->result);
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hdr->msg_status = msg_byte(req->result);
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hdr->host_status = host_byte(req->result);
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hdr->driver_status = driver_byte(req->result);
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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 = req->resid_len;
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hdr->sb_len_wr = 0;
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if (req->sense_len && hdr->sbp) {
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int len = min((unsigned int) hdr->mx_sb_len, req->sense_len);
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if (!copy_to_user(hdr->sbp, req->sense, len))
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hdr->sb_len_wr = len;
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else
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ret = -EFAULT;
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}
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r = blk_rq_unmap_user(bio);
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if (!ret)
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ret = r;
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return ret;
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}
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static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
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struct sg_io_hdr *hdr, fmode_t mode)
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{
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unsigned long start_time;
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ssize_t ret = 0;
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int writing = 0;
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int at_head = 0;
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struct request *rq;
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struct scsi_request *req;
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struct bio *bio;
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if (hdr->interface_id != 'S')
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return -EINVAL;
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if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
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return -EIO;
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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_DEV:
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writing = 1;
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break;
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case SG_DXFER_TO_FROM_DEV:
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case SG_DXFER_FROM_DEV:
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break;
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}
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if (hdr->flags & SG_FLAG_Q_AT_HEAD)
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at_head = 1;
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ret = -ENOMEM;
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rq = blk_get_request(q, writing ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, 0);
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if (IS_ERR(rq))
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return PTR_ERR(rq);
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req = scsi_req(rq);
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if (hdr->cmd_len > BLK_MAX_CDB) {
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req->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);
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if (!req->cmd)
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goto out_put_request;
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}
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ret = blk_fill_sghdr_rq(q, rq, hdr, mode);
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if (ret < 0)
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goto out_free_cdb;
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ret = 0;
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if (hdr->iovec_count) {
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struct iov_iter i;
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struct iovec *iov = NULL;
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ret = import_iovec(rq_data_dir(rq),
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hdr->dxferp, hdr->iovec_count,
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0, &iov, &i);
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if (ret < 0)
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goto out_free_cdb;
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/* SG_IO howto says that the shorter of the two wins */
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iov_iter_truncate(&i, hdr->dxfer_len);
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ret = blk_rq_map_user_iov(q, rq, NULL, &i, GFP_KERNEL);
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kfree(iov);
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} else if (hdr->dxfer_len)
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ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
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GFP_KERNEL);
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if (ret)
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goto out_free_cdb;
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bio = rq->bio;
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req->retries = 0;
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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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*/
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blk_execute_rq(q, bd_disk, rq, at_head);
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hdr->duration = jiffies_to_msecs(jiffies - start_time);
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ret = blk_complete_sghdr_rq(rq, hdr, bio);
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out_free_cdb:
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scsi_req_free_cmd(req);
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out_put_request:
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blk_put_request(rq);
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return ret;
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}
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/**
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* sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
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* @q: request queue to send scsi commands down
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* @disk: gendisk to operate on (option)
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* @mode: mode used to open the file through which the ioctl has been
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* submitted
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* @sic: userspace structure describing the command to perform
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*
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* Send down the scsi command described by @sic to the device below
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* the request queue @q. If @file is non-NULL it's used to perform
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* fine-grained permission checks that allow users to send down
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* non-destructive SCSI commands. If the caller has a struct gendisk
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* available it should be passed in as @disk to allow the low level
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* driver to use the information contained in it. A non-NULL @disk
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* is only allowed if the caller knows that the low level driver doesn't
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* need it (e.g. in the scsi subsystem).
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*
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* Notes:
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* - This interface is deprecated - users should use the SG_IO
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* interface instead, as this is a more flexible approach to
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* performing SCSI commands on a device.
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* - The SCSI command length is determined by examining the 1st byte
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* of the given command. There is no way to override this.
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* - Data transfers are limited to PAGE_SIZE
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* - The length (x + y) must be at least OMAX_SB_LEN bytes long to
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* accommodate the sense buffer when an error occurs.
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* The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
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* old code will not be surprised.
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* - If a Unix error occurs (e.g. ENOMEM) then the user will receive
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* a negative return and the Unix error code in 'errno'.
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* If the SCSI command succeeds then 0 is returned.
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* Positive numbers returned are the compacted SCSI error codes (4
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* bytes in one int) where the lowest byte is the SCSI status.
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*/
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int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
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struct scsi_ioctl_command __user *sic)
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{
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enum { OMAX_SB_LEN = 16 }; /* For backward compatibility */
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struct request *rq;
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struct scsi_request *req;
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int err;
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unsigned int in_len, out_len, bytes, opcode, cmdlen;
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char *buffer = NULL;
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if (!sic)
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return -EINVAL;
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/*
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* get in an out lengths, verify they don't exceed a page worth of data
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*/
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if (get_user(in_len, &sic->inlen))
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return -EFAULT;
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if (get_user(out_len, &sic->outlen))
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return -EFAULT;
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if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
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return -EINVAL;
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if (get_user(opcode, sic->data))
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return -EFAULT;
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bytes = max(in_len, out_len);
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if (bytes) {
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buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
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if (!buffer)
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return -ENOMEM;
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}
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rq = blk_get_request(q, in_len ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, 0);
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if (IS_ERR(rq)) {
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err = PTR_ERR(rq);
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goto error_free_buffer;
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}
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req = scsi_req(rq);
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cmdlen = COMMAND_SIZE(opcode);
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/*
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* get command and data to send to device, if any
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*/
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err = -EFAULT;
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req->cmd_len = cmdlen;
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if (copy_from_user(req->cmd, sic->data, cmdlen))
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goto error;
|
|
|
|
if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
|
|
goto error;
|
|
|
|
err = blk_verify_command(req->cmd, mode);
|
|
if (err)
|
|
goto error;
|
|
|
|
/* default. possible overriden later */
|
|
req->retries = 5;
|
|
|
|
switch (opcode) {
|
|
case SEND_DIAGNOSTIC:
|
|
case FORMAT_UNIT:
|
|
rq->timeout = FORMAT_UNIT_TIMEOUT;
|
|
req->retries = 1;
|
|
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;
|
|
req->retries = 1;
|
|
break;
|
|
default:
|
|
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
|
|
break;
|
|
}
|
|
|
|
if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, GFP_NOIO)) {
|
|
err = DRIVER_ERROR << 24;
|
|
goto error;
|
|
}
|
|
|
|
blk_execute_rq(q, disk, rq, 0);
|
|
|
|
err = req->result & 0xff; /* only 8 bit SCSI status */
|
|
if (err) {
|
|
if (req->sense_len && req->sense) {
|
|
bytes = (OMAX_SB_LEN > req->sense_len) ?
|
|
req->sense_len : OMAX_SB_LEN;
|
|
if (copy_to_user(sic->data, req->sense, bytes))
|
|
err = -EFAULT;
|
|
}
|
|
} else {
|
|
if (copy_to_user(sic->data, buffer, out_len))
|
|
err = -EFAULT;
|
|
}
|
|
|
|
error:
|
|
blk_put_request(rq);
|
|
|
|
error_free_buffer:
|
|
kfree(buffer);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
|
|
|
|
/* Send basic block requests */
|
|
static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
|
|
int cmd, int data)
|
|
{
|
|
struct request *rq;
|
|
int err;
|
|
|
|
rq = blk_get_request(q, REQ_OP_SCSI_OUT, 0);
|
|
if (IS_ERR(rq))
|
|
return PTR_ERR(rq);
|
|
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
|
|
scsi_req(rq)->cmd[0] = cmd;
|
|
scsi_req(rq)->cmd[4] = data;
|
|
scsi_req(rq)->cmd_len = 6;
|
|
blk_execute_rq(q, bd_disk, rq, 0);
|
|
err = scsi_req(rq)->result ? -EIO : 0;
|
|
blk_put_request(rq);
|
|
|
|
return err;
|
|
}
|
|
|
|
static inline int blk_send_start_stop(struct request_queue *q,
|
|
struct gendisk *bd_disk, int data)
|
|
{
|
|
return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
|
|
}
|
|
|
|
int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mode,
|
|
unsigned int cmd, void __user *arg)
|
|
{
|
|
int err;
|
|
|
|
if (!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(q, bd_disk, &hdr, mode);
|
|
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 = jiffies_to_msecs(cgc.timeout);
|
|
hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
|
|
hdr.cmd_len = sizeof(cgc.cmd);
|
|
|
|
err = sg_io(q, bd_disk, &hdr, mode);
|
|
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(q, bd_disk, mode, arg);
|
|
break;
|
|
case CDROMCLOSETRAY:
|
|
err = blk_send_start_stop(q, bd_disk, 0x03);
|
|
break;
|
|
case CDROMEJECT:
|
|
err = blk_send_start_stop(q, bd_disk, 0x02);
|
|
break;
|
|
default:
|
|
err = -ENOTTY;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(scsi_cmd_ioctl);
|
|
|
|
int scsi_verify_blk_ioctl(struct block_device *bd, unsigned int cmd)
|
|
{
|
|
if (bd && bd == bd->bd_contains)
|
|
return 0;
|
|
|
|
if (capable(CAP_SYS_RAWIO))
|
|
return 0;
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
EXPORT_SYMBOL(scsi_verify_blk_ioctl);
|
|
|
|
int scsi_cmd_blk_ioctl(struct block_device *bd, fmode_t mode,
|
|
unsigned int cmd, void __user *arg)
|
|
{
|
|
int ret;
|
|
|
|
ret = scsi_verify_blk_ioctl(bd, cmd);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return scsi_cmd_ioctl(bd->bd_disk->queue, bd->bd_disk, mode, cmd, arg);
|
|
}
|
|
EXPORT_SYMBOL(scsi_cmd_blk_ioctl);
|
|
|
|
/**
|
|
* scsi_req_init - initialize certain fields of a scsi_request structure
|
|
* @req: Pointer to a scsi_request structure.
|
|
* Initializes .__cmd[], .cmd, .cmd_len and .sense_len but no other members
|
|
* of struct scsi_request.
|
|
*/
|
|
void scsi_req_init(struct scsi_request *req)
|
|
{
|
|
memset(req->__cmd, 0, sizeof(req->__cmd));
|
|
req->cmd = req->__cmd;
|
|
req->cmd_len = BLK_MAX_CDB;
|
|
req->sense_len = 0;
|
|
}
|
|
EXPORT_SYMBOL(scsi_req_init);
|
|
|
|
static int __init blk_scsi_ioctl_init(void)
|
|
{
|
|
blk_set_cmd_filter_defaults(&blk_default_cmd_filter);
|
|
return 0;
|
|
}
|
|
fs_initcall(blk_scsi_ioctl_init);
|