summaryrefslogtreecommitdiff
path: root/drivers/block/scsi_ioctl.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/block/scsi_ioctl.c')
-rw-r--r--drivers/block/scsi_ioctl.c589
1 files changed, 0 insertions, 589 deletions
diff --git a/drivers/block/scsi_ioctl.c b/drivers/block/scsi_ioctl.c
deleted file mode 100644
index 382dea7b224c..000000000000
--- a/drivers/block/scsi_ioctl.c
+++ /dev/null
@@ -1,589 +0,0 @@
-/*
- * Copyright (C) 2001 Jens Axboe <axboe@suse.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 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 Licens
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-
- *
- */
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/module.h>
-#include <linux/blkdev.h>
-#include <linux/completion.h>
-#include <linux/cdrom.h>
-#include <linux/slab.h>
-#include <linux/times.h>
-#include <asm/uaccess.h>
-
-#include <scsi/scsi.h>
-#include <scsi/scsi_ioctl.h>
-#include <scsi/scsi_cmnd.h>
-
-/* Command group 3 is reserved and should never be used. */
-const unsigned char scsi_command_size[8] =
-{
- 6, 10, 10, 12,
- 16, 12, 10, 10
-};
-
-EXPORT_SYMBOL(scsi_command_size);
-
-#define BLK_DEFAULT_TIMEOUT (60 * HZ)
-
-#include <scsi/sg.h>
-
-static int sg_get_version(int __user *p)
-{
- static int sg_version_num = 30527;
- return put_user(sg_version_num, p);
-}
-
-static int scsi_get_idlun(request_queue_t *q, int __user *p)
-{
- return put_user(0, p);
-}
-
-static int scsi_get_bus(request_queue_t *q, int __user *p)
-{
- return put_user(0, p);
-}
-
-static int sg_get_timeout(request_queue_t *q)
-{
- return q->sg_timeout / (HZ / USER_HZ);
-}
-
-static int sg_set_timeout(request_queue_t *q, int __user *p)
-{
- int timeout, err = get_user(timeout, p);
-
- if (!err)
- q->sg_timeout = timeout * (HZ / USER_HZ);
-
- return err;
-}
-
-static int sg_get_reserved_size(request_queue_t *q, int __user *p)
-{
- return put_user(q->sg_reserved_size, p);
-}
-
-static int sg_set_reserved_size(request_queue_t *q, int __user *p)
-{
- int size, err = get_user(size, p);
-
- if (err)
- return err;
-
- if (size < 0)
- return -EINVAL;
- if (size > (q->max_sectors << 9))
- size = q->max_sectors << 9;
-
- q->sg_reserved_size = size;
- return 0;
-}
-
-/*
- * will always return that we are ATAPI even for a real SCSI drive, I'm not
- * so sure this is worth doing anything about (why would you care??)
- */
-static int sg_emulated_host(request_queue_t *q, int __user *p)
-{
- return put_user(1, p);
-}
-
-#define CMD_READ_SAFE 0x01
-#define CMD_WRITE_SAFE 0x02
-#define CMD_WARNED 0x04
-#define safe_for_read(cmd) [cmd] = CMD_READ_SAFE
-#define safe_for_write(cmd) [cmd] = CMD_WRITE_SAFE
-
-static int verify_command(struct file *file, unsigned char *cmd)
-{
- static unsigned char cmd_type[256] = {
-
- /* Basic read-only commands */
- safe_for_read(TEST_UNIT_READY),
- safe_for_read(REQUEST_SENSE),
- safe_for_read(READ_6),
- safe_for_read(READ_10),
- safe_for_read(READ_12),
- safe_for_read(READ_16),
- safe_for_read(READ_BUFFER),
- safe_for_read(READ_DEFECT_DATA),
- safe_for_read(READ_LONG),
- safe_for_read(INQUIRY),
- safe_for_read(MODE_SENSE),
- safe_for_read(MODE_SENSE_10),
- safe_for_read(LOG_SENSE),
- safe_for_read(START_STOP),
- safe_for_read(GPCMD_VERIFY_10),
- safe_for_read(VERIFY_16),
-
- /* Audio CD commands */
- safe_for_read(GPCMD_PLAY_CD),
- safe_for_read(GPCMD_PLAY_AUDIO_10),
- safe_for_read(GPCMD_PLAY_AUDIO_MSF),
- safe_for_read(GPCMD_PLAY_AUDIO_TI),
- safe_for_read(GPCMD_PAUSE_RESUME),
-
- /* CD/DVD data reading */
- safe_for_read(GPCMD_READ_BUFFER_CAPACITY),
- safe_for_read(GPCMD_READ_CD),
- safe_for_read(GPCMD_READ_CD_MSF),
- safe_for_read(GPCMD_READ_DISC_INFO),
- safe_for_read(GPCMD_READ_CDVD_CAPACITY),
- safe_for_read(GPCMD_READ_DVD_STRUCTURE),
- safe_for_read(GPCMD_READ_HEADER),
- safe_for_read(GPCMD_READ_TRACK_RZONE_INFO),
- safe_for_read(GPCMD_READ_SUBCHANNEL),
- safe_for_read(GPCMD_READ_TOC_PMA_ATIP),
- safe_for_read(GPCMD_REPORT_KEY),
- safe_for_read(GPCMD_SCAN),
- safe_for_read(GPCMD_GET_CONFIGURATION),
- safe_for_read(GPCMD_READ_FORMAT_CAPACITIES),
- safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION),
- safe_for_read(GPCMD_GET_PERFORMANCE),
- safe_for_read(GPCMD_SEEK),
- safe_for_read(GPCMD_STOP_PLAY_SCAN),
-
- /* Basic writing commands */
- safe_for_write(WRITE_6),
- safe_for_write(WRITE_10),
- safe_for_write(WRITE_VERIFY),
- safe_for_write(WRITE_12),
- safe_for_write(WRITE_VERIFY_12),
- safe_for_write(WRITE_16),
- safe_for_write(WRITE_LONG),
- safe_for_write(WRITE_LONG_2),
- safe_for_write(ERASE),
- safe_for_write(GPCMD_MODE_SELECT_10),
- safe_for_write(MODE_SELECT),
- safe_for_write(LOG_SELECT),
- safe_for_write(GPCMD_BLANK),
- safe_for_write(GPCMD_CLOSE_TRACK),
- safe_for_write(GPCMD_FLUSH_CACHE),
- safe_for_write(GPCMD_FORMAT_UNIT),
- safe_for_write(GPCMD_REPAIR_RZONE_TRACK),
- safe_for_write(GPCMD_RESERVE_RZONE_TRACK),
- safe_for_write(GPCMD_SEND_DVD_STRUCTURE),
- safe_for_write(GPCMD_SEND_EVENT),
- safe_for_write(GPCMD_SEND_KEY),
- safe_for_write(GPCMD_SEND_OPC),
- safe_for_write(GPCMD_SEND_CUE_SHEET),
- safe_for_write(GPCMD_SET_SPEED),
- safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL),
- safe_for_write(GPCMD_LOAD_UNLOAD),
- safe_for_write(GPCMD_SET_STREAMING),
- };
- unsigned char type = cmd_type[cmd[0]];
-
- /* Anybody who can open the device can do a read-safe command */
- if (type & CMD_READ_SAFE)
- return 0;
-
- /* Write-safe commands just require a writable open.. */
- if (type & CMD_WRITE_SAFE) {
- if (file->f_mode & FMODE_WRITE)
- return 0;
- }
-
- /* And root can do any command.. */
- if (capable(CAP_SYS_RAWIO))
- return 0;
-
- if (!type) {
- cmd_type[cmd[0]] = CMD_WARNED;
- printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
- }
-
- /* Otherwise fail it with an "Operation not permitted" */
- return -EPERM;
-}
-
-static int sg_io(struct file *file, request_queue_t *q,
- struct gendisk *bd_disk, struct sg_io_hdr *hdr)
-{
- unsigned long start_time;
- int writing = 0, ret = 0;
- struct request *rq;
- struct bio *bio;
- char sense[SCSI_SENSE_BUFFERSIZE];
- unsigned char cmd[BLK_MAX_CDB];
-
- if (hdr->interface_id != 'S')
- return -EINVAL;
- if (hdr->cmd_len > BLK_MAX_CDB)
- return -EINVAL;
- if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
- return -EFAULT;
- if (verify_command(file, cmd))
- return -EPERM;
-
- if (hdr->dxfer_len > (q->max_sectors << 9))
- return -EIO;
-
- if (hdr->dxfer_len)
- switch (hdr->dxfer_direction) {
- default:
- return -EINVAL;
- case SG_DXFER_TO_FROM_DEV:
- case SG_DXFER_TO_DEV:
- writing = 1;
- break;
- case SG_DXFER_FROM_DEV:
- break;
- }
-
- rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
- if (!rq)
- return -ENOMEM;
-
- if (hdr->iovec_count) {
- const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
- struct sg_iovec *iov;
-
- iov = kmalloc(size, GFP_KERNEL);
- if (!iov) {
- ret = -ENOMEM;
- goto out;
- }
-
- if (copy_from_user(iov, hdr->dxferp, size)) {
- kfree(iov);
- ret = -EFAULT;
- goto out;
- }
-
- ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count);
- kfree(iov);
- } else if (hdr->dxfer_len)
- ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
-
- if (ret)
- goto out;
-
- /*
- * fill in request structure
- */
- rq->cmd_len = hdr->cmd_len;
- memcpy(rq->cmd, cmd, hdr->cmd_len);
- if (sizeof(rq->cmd) != hdr->cmd_len)
- memset(rq->cmd + hdr->cmd_len, 0, sizeof(rq->cmd) - hdr->cmd_len);
-
- memset(sense, 0, sizeof(sense));
- rq->sense = sense;
- rq->sense_len = 0;
-
- rq->flags |= REQ_BLOCK_PC;
- bio = rq->bio;
-
- /*
- * bounce this after holding a reference to the original bio, it's
- * needed for proper unmapping
- */
- if (rq->bio)
- blk_queue_bounce(q, &rq->bio);
-
- rq->timeout = (hdr->timeout * HZ) / 1000;
- if (!rq->timeout)
- rq->timeout = q->sg_timeout;
- if (!rq->timeout)
- rq->timeout = BLK_DEFAULT_TIMEOUT;
-
- start_time = jiffies;
-
- /* ignore return value. All information is passed back to caller
- * (if he doesn't check that is his problem).
- * N.B. a non-zero SCSI status is _not_ necessarily an error.
- */
- blk_execute_rq(q, bd_disk, rq, 0);
-
- /* write to all output members */
- hdr->status = 0xff & rq->errors;
- hdr->masked_status = status_byte(rq->errors);
- hdr->msg_status = msg_byte(rq->errors);
- hdr->host_status = host_byte(rq->errors);
- hdr->driver_status = driver_byte(rq->errors);
- hdr->info = 0;
- if (hdr->masked_status || hdr->host_status || hdr->driver_status)
- hdr->info |= SG_INFO_CHECK;
- 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))
- hdr->sb_len_wr = len;
- }
-
- if (blk_rq_unmap_user(bio, hdr->dxfer_len))
- ret = -EFAULT;
-
- /* may not have succeeded, but output values written to control
- * structure (struct sg_io_hdr). */
-out:
- blk_put_request(rq);
- return ret;
-}
-
-#define OMAX_SB_LEN 16 /* For backward compatibility */
-
-static int sg_scsi_ioctl(struct file *file, request_queue_t *q,
- struct gendisk *bd_disk, Scsi_Ioctl_Command __user *sic)
-{
- struct request *rq;
- int err;
- unsigned int in_len, out_len, bytes, opcode, cmdlen;
- char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
-
- /*
- * get in an out lengths, verify they don't exceed a page worth of data
- */
- 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| __GFP_NOWARN);
- 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, 0);
- 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, 0);
- blk_put_request(rq);
- break;
- default:
- err = -ENOTTY;
- }
-
- blk_put_queue(q);
- return err;
-}
-
-EXPORT_SYMBOL(scsi_cmd_ioctl);