LXR linux/block/scsi

   1/*
   2 * Copyright (C) 2001 Jens Axboe <axboe@suse.de>
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope that it will be useful,
   9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 *
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public Licens
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-
  17 *
  18 */
  19#include <linux/kernel.h>
  20#include <linux/errno.h>
  21#include <linux/string.h>
  22#include <linux/module.h>
  23#include <linux/blkdev.h>
  24#include <linux/capability.h>
  25#include <linux/completion.h>
  26#include <linux/cdrom.h>
  27#include <linux/slab.h>
  28#include <linux/times.h>
  29#include <asm/uaccess.h>
  30
  31#include <scsi/scsi.h>
  32#include <scsi/scsi_ioctl.h>
  33#include <scsi/scsi_cmnd.h>
  34
  35/* Command group 3 is reserved and should never be used.  */
  36const unsigned char scsi_command_size[8] =
  37{
  38        6, 10, 10, 12,
  39        16, 12, 10, 10
  40};
  41
  42EXPORT_SYMBOL(scsi_command_size);
  43
  44#include <scsi/sg.h>
  45
  46static int sg_get_version(int __user *p)
  47{
  48        static const int sg_version_num = 30527;
  49        return put_user(sg_version_num, p);
  50}
  51
  52static int scsi_get_idlun(struct request_queue *q, int __user *p)
  53{
  54        return put_user(0, p);
  55}
  56
  57static int scsi_get_bus(struct request_queue *q, int __user *p)
  58{
  59        return put_user(0, p);
  60}
  61
  62static int sg_get_timeout(struct request_queue *q)
  63{
  64        return q->sg_timeout / (HZ / USER_HZ);
  65}
  66
  67static int sg_set_timeout(struct request_queue *q, int __user *p)
  68{
  69        int timeout, err = get_user(timeout, p);
  70
  71        if (!err)
  72                q->sg_timeout = timeout * (HZ / USER_HZ);
  73
  74        return err;
  75}
  76
  77static int sg_get_reserved_size(struct request_queue *q, int __user *p)
  78{
  79        unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
  80
  81        return put_user(val, p);
  82}
  83
  84static int sg_set_reserved_size(struct request_queue *q, int __user *p)
  85{
  86        int size, err = get_user(size, p);
  87
  88        if (err)
  89                return err;
  90
  91        if (size < 0)
  92                return -EINVAL;
  93        if (size > (q->max_sectors << 9))
  94                size = q->max_sectors << 9;
  95
  96        q->sg_reserved_size = size;
  97        return 0;
  98}
  99
 100/*
 101 * will always return that we are ATAPI even for a real SCSI drive, I'm not
 102 * so sure this is worth doing anything about (why would you care??)
 103 */
 104static int sg_emulated_host(struct request_queue *q, int __user *p)
 105{
 106        return put_user(1, p);
 107}
 108
 109#define CMD_READ_SAFE   0x01
 110#define CMD_WRITE_SAFE  0x02
 111#define CMD_WARNED      0x04
 112#define safe_for_read(cmd)      [cmd] = CMD_READ_SAFE
 113#define safe_for_write(cmd)     [cmd] = CMD_WRITE_SAFE
 114
 115int blk_verify_command(unsigned char *cmd, int has_write_perm)
 116{
 117        static unsigned char cmd_type[256] = {
 118
 119                /* Basic read-only commands */
 120                safe_for_read(TEST_UNIT_READY),
 121                safe_for_read(REQUEST_SENSE),
 122                safe_for_read(READ_6),
 123                safe_for_read(READ_10),
 124                safe_for_read(READ_12),
 125                safe_for_read(READ_16),
 126                safe_for_read(READ_BUFFER),
 127                safe_for_read(READ_DEFECT_DATA),
 128                safe_for_read(READ_LONG),
 129                safe_for_read(INQUIRY),
 130                safe_for_read(MODE_SENSE),
 131                safe_for_read(MODE_SENSE_10),
 132                safe_for_read(LOG_SENSE),
 133                safe_for_read(START_STOP),
 134                safe_for_read(GPCMD_VERIFY_10),
 135                safe_for_read(VERIFY_16),
 136
 137                /* Audio CD commands */
 138                safe_for_read(GPCMD_PLAY_CD),
 139                safe_for_read(GPCMD_PLAY_AUDIO_10),
 140                safe_for_read(GPCMD_PLAY_AUDIO_MSF),
 141                safe_for_read(GPCMD_PLAY_AUDIO_TI),
 142                safe_for_read(GPCMD_PAUSE_RESUME),
 143
 144                /* CD/DVD data reading */
 145                safe_for_read(GPCMD_READ_BUFFER_CAPACITY),
 146                safe_for_read(GPCMD_READ_CD),
 147                safe_for_read(GPCMD_READ_CD_MSF),
 148                safe_for_read(GPCMD_READ_DISC_INFO),
 149                safe_for_read(GPCMD_READ_CDVD_CAPACITY),
 150                safe_for_read(GPCMD_READ_DVD_STRUCTURE),
 151                safe_for_read(GPCMD_READ_HEADER),
 152                safe_for_read(GPCMD_READ_TRACK_RZONE_INFO),
 153                safe_for_read(GPCMD_READ_SUBCHANNEL),
 154                safe_for_read(GPCMD_READ_TOC_PMA_ATIP),
 155                safe_for_read(GPCMD_REPORT_KEY),
 156                safe_for_read(GPCMD_SCAN),
 157                safe_for_read(GPCMD_GET_CONFIGURATION),
 158                safe_for_read(GPCMD_READ_FORMAT_CAPACITIES),
 159                safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION),
 160                safe_for_read(GPCMD_GET_PERFORMANCE),
 161                safe_for_read(GPCMD_SEEK),
 162                safe_for_read(GPCMD_STOP_PLAY_SCAN),
 163
 164                /* Basic writing commands */
 165                safe_for_write(WRITE_6),
 166                safe_for_write(WRITE_10),
 167                safe_for_write(WRITE_VERIFY),
 168                safe_for_write(WRITE_12),
 169                safe_for_write(WRITE_VERIFY_12),
 170                safe_for_write(WRITE_16),
 171                safe_for_write(WRITE_LONG),
 172                safe_for_write(WRITE_LONG_2),
 173                safe_for_write(ERASE),
 174                safe_for_write(GPCMD_MODE_SELECT_10),
 175                safe_for_write(MODE_SELECT),
 176                safe_for_write(LOG_SELECT),
 177                safe_for_write(GPCMD_BLANK),
 178                safe_for_write(GPCMD_CLOSE_TRACK),
 179                safe_for_write(GPCMD_FLUSH_CACHE),
 180                safe_for_write(GPCMD_FORMAT_UNIT),
 181                safe_for_write(GPCMD_REPAIR_RZONE_TRACK),
 182                safe_for_write(GPCMD_RESERVE_RZONE_TRACK),
 183                safe_for_write(GPCMD_SEND_DVD_STRUCTURE),
 184                safe_for_write(GPCMD_SEND_EVENT),
 185                safe_for_write(GPCMD_SEND_KEY),
 186                safe_for_write(GPCMD_SEND_OPC),
 187                safe_for_write(GPCMD_SEND_CUE_SHEET),
 188                safe_for_write(GPCMD_SET_SPEED),
 189                safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL),
 190                safe_for_write(GPCMD_LOAD_UNLOAD),
 191                safe_for_write(GPCMD_SET_STREAMING),
 192        };
 193        unsigned char type = cmd_type[cmd[0]];
 194
 195        /* Anybody who can open the device can do a read-safe command */
 196        if (type & CMD_READ_SAFE)
 197                return 0;
 198
 199        /* Write-safe commands just require a writable open.. */
 200        if ((type & CMD_WRITE_SAFE) && has_write_perm)
 201                return 0;
 202
 203        /* And root can do any command.. */
 204        if (capable(CAP_SYS_RAWIO))
 205                return 0;
 206
 207        if (!type) {
 208                cmd_type[cmd[0]] = CMD_WARNED;
 209                printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
 210        }
 211
 212        /* Otherwise fail it with an "Operation not permitted" */
 213        return -EPERM;
 214}
 215EXPORT_SYMBOL_GPL(blk_verify_command);
 216
 217static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
 218                             struct sg_io_hdr *hdr, int has_write_perm)
 219{
 220        memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
 221
 222        if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
 223                return -EFAULT;
 224        if (blk_verify_command(rq->cmd, has_write_perm))
 225                return -EPERM;
 226
 227        /*
 228         * fill in request structure
 229         */
 230        rq->cmd_len = hdr->cmd_len;
 231        rq->cmd_type = REQ_TYPE_BLOCK_PC;
 232
 233        rq->timeout = (hdr->timeout * HZ) / 1000;
 234        if (!rq->timeout)
 235                rq->timeout = q->sg_timeout;
 236        if (!rq->timeout)
 237                rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
 238
 239        return 0;
 240}
 241
 242/*
 243 * unmap a request that was previously mapped to this sg_io_hdr. handles
 244 * both sg and non-sg sg_io_hdr.
 245 */
 246static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
 247{
 248        blk_rq_unmap_user(rq->bio);
 249        blk_put_request(rq);
 250        return 0;
 251}
 252
 253static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
 254                                 struct bio *bio)
 255{
 256        int r, ret = 0;
 257
 258        /*
 259         * fill in all the output members
 260         */
 261        hdr->status = rq->errors & 0xff;
 262        hdr->masked_status = status_byte(rq->errors);
 263        hdr->msg_status = msg_byte(rq->errors);
 264        hdr->host_status = host_byte(rq->errors);
 265        hdr->driver_status = driver_byte(rq->errors);
 266        hdr->info = 0;
 267        if (hdr->masked_status || hdr->host_status || hdr->driver_status)
 268                hdr->info |= SG_INFO_CHECK;
 269        hdr->resid = rq->data_len;
 270        hdr->sb_len_wr = 0;
 271
 272        if (rq->sense_len && hdr->sbp) {
 273                int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
 274
 275                if (!copy_to_user(hdr->sbp, rq->sense, len))
 276                        hdr->sb_len_wr = len;
 277                else
 278                        ret = -EFAULT;
 279        }
 280
 281        rq->bio = bio;
 282        r = blk_unmap_sghdr_rq(rq, hdr);
 283        if (ret)
 284                r = ret;
 285
 286        return r;
 287}
 288
 289static int sg_io(struct file *file, struct request_queue *q,
 290                struct gendisk *bd_disk, struct sg_io_hdr *hdr)
 291{
 292        unsigned long start_time;
 293        int writing = 0, ret = 0, has_write_perm = 0;
 294        struct request *rq;
 295        char sense[SCSI_SENSE_BUFFERSIZE];
 296        struct bio *bio;
 297
 298        if (hdr->interface_id != 'S')
 299                return -EINVAL;
 300        if (hdr->cmd_len > BLK_MAX_CDB)
 301                return -EINVAL;
 302
 303        if (hdr->dxfer_len > (q->max_hw_sectors << 9))
 304                return -EIO;
 305
 306        if (hdr->dxfer_len)
 307                switch (hdr->dxfer_direction) {
 308                default:
 309                        return -EINVAL;
 310                case SG_DXFER_TO_DEV:
 311                        writing = 1;
 312                        break;
 313                case SG_DXFER_TO_FROM_DEV:
 314                case SG_DXFER_FROM_DEV:
 315                        break;
 316                }
 317
 318        rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
 319        if (!rq)
 320                return -ENOMEM;
 321
 322        if (file)
 323                has_write_perm = file->f_mode & FMODE_WRITE;
 324
 325        if (blk_fill_sghdr_rq(q, rq, hdr, has_write_perm)) {
 326                blk_put_request(rq);
 327                return -EFAULT;
 328        }
 329
 330        if (hdr->iovec_count) {
 331                const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
 332                struct sg_iovec *iov;
 333
 334                iov = kmalloc(size, GFP_KERNEL);
 335                if (!iov) {
 336                        ret = -ENOMEM;
 337                        goto out;
 338                }
 339
 340                if (copy_from_user(iov, hdr->dxferp, size)) {
 341                        kfree(iov);
 342                        ret = -EFAULT;
 343                        goto out;
 344                }
 345
 346                ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
 347                                          hdr->dxfer_len);
 348                kfree(iov);
 349        } else if (hdr->dxfer_len)
 350                ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
 351
 352        if (ret)
 353                goto out;
 354
 355        bio = rq->bio;
 356        memset(sense, 0, sizeof(sense));
 357        rq->sense = sense;
 358        rq->sense_len = 0;
 359        rq->retries = 0;
 360
 361        start_time = jiffies;
 362
 363        /* ignore return value. All information is passed back to caller
 364         * (if he doesn't check that is his problem).
 365         * N.B. a non-zero SCSI status is _not_ necessarily an error.
 366         */
 367        blk_execute_rq(q, bd_disk, rq, 0);
 368
 369        hdr->duration = ((jiffies - start_time) * 1000) / HZ;
 370
 371        return blk_complete_sghdr_rq(rq, hdr, bio);
 372out:
 373        blk_put_request(rq);
 374        return ret;
 375}
 376
 377/**
 378 * sg_scsi_ioctl  --  handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
 379 * @file:       file this ioctl operates on (optional)
 380 * @q:          request queue to send scsi commands down
 381 * @disk:       gendisk to operate on (option)
 382 * @sic:        userspace structure describing the command to perform
 383 *
 384 * Send down the scsi command described by @sic to the device below
 385 * the request queue @q.  If @file is non-NULL it's used to perform
 386 * fine-grained permission checks that allow users to send down
 387 * non-destructive SCSI commands.  If the caller has a struct gendisk
 388 * available it should be passed in as @disk to allow the low level
 389 * driver to use the information contained in it.  A non-NULL @disk
 390 * is only allowed if the caller knows that the low level driver doesn't
 391 * need it (e.g. in the scsi subsystem).
 392 *
 393 * Notes:
 394 *   -  This interface is deprecated - users should use the SG_IO
 395 *      interface instead, as this is a more flexible approach to
 396 *      performing SCSI commands on a device.
 397 *   -  The SCSI command length is determined by examining the 1st byte
 398 *      of the given command. There is no way to override this.
 399 *   -  Data transfers are limited to PAGE_SIZE
 400 *   -  The length (x + y) must be at least OMAX_SB_LEN bytes long to
 401 *      accommodate the sense buffer when an error occurs.
 402 *      The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
 403 *      old code will not be surprised.
 404 *   -  If a Unix error occurs (e.g. ENOMEM) then the user will receive
 405 *      a negative return and the Unix error code in 'errno'.
 406 *      If the SCSI command succeeds then 0 is returned.
 407 *      Positive numbers returned are the compacted SCSI error codes (4
 408 *      bytes in one int) where the lowest byte is the SCSI status.
 409 */
 410#define OMAX_SB_LEN 16          /* For backward compatibility */
 411int sg_scsi_ioctl(struct file *file, struct request_queue *q,
 412                  struct gendisk *disk, struct scsi_ioctl_command __user *sic)
 413{
 414        struct request *rq;
 415        int err;
 416        unsigned int in_len, out_len, bytes, opcode, cmdlen;
 417        char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
 418
 419        if (!sic)
 420                return -EINVAL;
 421
 422        /*
 423         * get in an out lengths, verify they don't exceed a page worth of data
 424         */
 425        if (get_user(in_len, &sic->inlen))
 426                return -EFAULT;
 427        if (get_user(out_len, &sic->outlen))
 428                return -EFAULT;
 429        if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
 430                return -EINVAL;
 431        if (get_user(opcode, sic->data))
 432                return -EFAULT;
 433
 434        bytes = max(in_len, out_len);
 435        if (bytes) {
 436                buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
 437                if (!buffer)
 438                        return -ENOMEM;
 439
 440        }
 441
 442        rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
 443
 444        cmdlen = COMMAND_SIZE(opcode);
 445
 446        /*
 447         * get command and data to send to device, if any
 448         */
 449        err = -EFAULT;
 450        rq->cmd_len = cmdlen;
 451        if (copy_from_user(rq->cmd, sic->data, cmdlen))
 452                goto error;
 453
 454        if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
 455                goto error;
 456
 457        err = blk_verify_command(rq->cmd, file->f_mode & FMODE_WRITE);
 458        if (err)
 459                goto error;
 460
 461        /* default.  possible overriden later */
 462        rq->retries = 5;
 463
 464        switch (opcode) {
 465        case SEND_DIAGNOSTIC:
 466        case FORMAT_UNIT:
 467                rq->timeout = FORMAT_UNIT_TIMEOUT;
 468                rq->retries = 1;
 469                break;
 470        case START_STOP:
 471                rq->timeout = START_STOP_TIMEOUT;
 472                break;
 473        case MOVE_MEDIUM:
 474                rq->timeout = MOVE_MEDIUM_TIMEOUT;
 475                break;
 476        case READ_ELEMENT_STATUS:
 477                rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
 478                break;
 479        case READ_DEFECT_DATA:
 480                rq->timeout = READ_DEFECT_DATA_TIMEOUT;
 481                rq->retries = 1;
 482                break;
 483        default:
 484                rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
 485                break;
 486        }
 487
 488        if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
 489                err = DRIVER_ERROR << 24;
 490                goto out;
 491        }
 492
 493        memset(sense, 0, sizeof(sense));
 494        rq->sense = sense;
 495        rq->sense_len = 0;
 496        rq->cmd_type = REQ_TYPE_BLOCK_PC;
 497
 498        blk_execute_rq(q, disk, rq, 0);
 499
 500out:
 501        err = rq->errors & 0xff;        /* only 8 bit SCSI status */
 502        if (err) {
 503                if (rq->sense_len && rq->sense) {
 504                        bytes = (OMAX_SB_LEN > rq->sense_len) ?
 505                                rq->sense_len : OMAX_SB_LEN;
 506                        if (copy_to_user(sic->data, rq->sense, bytes))
 507                                err = -EFAULT;
 508                }
 509        } else {
 510                if (copy_to_user(sic->data, buffer, out_len))
 511                        err = -EFAULT;
 512        }
 513        
 514error:
 515        kfree(buffer);
 516        blk_put_request(rq);
 517        return err;
 518}
 519EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
 520
 521/* Send basic block requests */
 522static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
 523                              int cmd, int data)
 524{
 525        struct request *rq;
 526        int err;
 527
 528        rq = blk_get_request(q, WRITE, __GFP_WAIT);
 529        rq->cmd_type = REQ_TYPE_BLOCK_PC;
 530        rq->data = NULL;
 531        rq->data_len = 0;
 532        rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
 533        memset(rq->cmd, 0, sizeof(rq->cmd));
 534        rq->cmd[0] = cmd;
 535        rq->cmd[4] = data;
 536        rq->cmd_len = 6;
 537        err = blk_execute_rq(q, bd_disk, rq, 0);
 538        blk_put_request(rq);
 539
 540        return err;
 541}
 542
 543static inline int blk_send_start_stop(struct request_queue *q,
 544                                      struct gendisk *bd_disk, int data)
 545{
 546        return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
 547}
 548
 549int scsi_cmd_ioctl(struct file *file, struct request_queue *q,
 550                   struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
 551{
 552        int err;
 553
 554        if (!q || blk_get_queue(q))
 555                return -ENXIO;
 556
 557        switch (cmd) {
 558                /*
 559                 * new sgv3 interface
 560                 */
 561                case SG_GET_VERSION_NUM:
 562                        err = sg_get_version(arg);
 563                        break;
 564                case SCSI_IOCTL_GET_IDLUN:
 565                        err = scsi_get_idlun(q, arg);
 566                        break;
 567                case SCSI_IOCTL_GET_BUS_NUMBER:
 568                        err = scsi_get_bus(q, arg);
 569                        break;
 570                case SG_SET_TIMEOUT:
 571                        err = sg_set_timeout(q, arg);
 572                        break;
 573                case SG_GET_TIMEOUT:
 574                        err = sg_get_timeout(q);
 575                        break;
 576                case SG_GET_RESERVED_SIZE:
 577                        err = sg_get_reserved_size(q, arg);
 578                        break;
 579                case SG_SET_RESERVED_SIZE:
 580                        err = sg_set_reserved_size(q, arg);
 581                        break;
 582                case SG_EMULATED_HOST:
 583                        err = sg_emulated_host(q, arg);
 584                        break;
 585                case SG_IO: {
 586                        struct sg_io_hdr hdr;
 587
 588                        err = -EFAULT;
 589                        if (copy_from_user(&hdr, arg, sizeof(hdr)))
 590                                break;
 591                        err = sg_io(file, q, bd_disk, &hdr);
 592                        if (err == -EFAULT)
 593                                break;
 594
 595                        if (copy_to_user(arg, &hdr, sizeof(hdr)))
 596                                err = -EFAULT;
 597                        break;
 598                }
 599                case CDROM_SEND_PACKET: {
 600                        struct cdrom_generic_command cgc;
 601                        struct sg_io_hdr hdr;
 602
 603                        err = -EFAULT;
 604                        if (copy_from_user(&cgc, arg, sizeof(cgc)))
 605                                break;
 606                        cgc.timeout = clock_t_to_jiffies(cgc.timeout);
 607                        memset(&hdr, 0, sizeof(hdr));
 608                        hdr.interface_id = 'S';
 609                        hdr.cmd_len = sizeof(cgc.cmd);
 610                        hdr.dxfer_len = cgc.buflen;
 611                        err = 0;
 612                        switch (cgc.data_direction) {
 613                                case CGC_DATA_UNKNOWN:
 614                                        hdr.dxfer_direction = SG_DXFER_UNKNOWN;
 615                                        break;
 616                                case CGC_DATA_WRITE:
 617                                        hdr.dxfer_direction = SG_DXFER_TO_DEV;
 618                                        break;
 619                                case CGC_DATA_READ:
 620                                        hdr.dxfer_direction = SG_DXFER_FROM_DEV;
 621                                        break;
 622                                case CGC_DATA_NONE:
 623                                        hdr.dxfer_direction = SG_DXFER_NONE;
 624                                        break;
 625                                default:
 626                                        err = -EINVAL;
 627                        }
 628                        if (err)
 629                                break;
 630
 631                        hdr.dxferp = cgc.buffer;
 632                        hdr.sbp = cgc.sense;
 633                        if (hdr.sbp)
 634                                hdr.mx_sb_len = sizeof(struct request_sense);
 635                        hdr.timeout = cgc.timeout;
 636                        hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
 637                        hdr.cmd_len = sizeof(cgc.cmd);
 638
 639                        err = sg_io(file, q, bd_disk, &hdr);
 640                        if (err == -EFAULT)
 641                                break;
 642
 643                        if (hdr.status)
 644                                err = -EIO;
 645
 646                        cgc.stat = err;
 647                        cgc.buflen = hdr.resid;
 648                        if (copy_to_user(arg, &cgc, sizeof(cgc)))
 649                                err = -EFAULT;
 650
 651                        break;
 652                }
 653
 654                /*
 655                 * old junk scsi send command ioctl
 656                 */
 657                case SCSI_IOCTL_SEND_COMMAND:
 658                        printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
 659                        err = -EINVAL;
 660                        if (!arg)
 661                                break;
 662
 663                        err = sg_scsi_ioctl(file, q, bd_disk, arg);
 664                        break;
 665                case CDROMCLOSETRAY:
 666                        err = blk_send_start_stop(q, bd_disk, 0x03);
 667                        break;
 668                case CDROMEJECT:
 669                        err = blk_send_start_stop(q, bd_disk, 0x02);
 670                        break;
 671                default:
 672                        err = -ENOTTY;
 673        }
 674
 675        blk_put_queue(q);
 676        return err;
 677}
 678
 679EXPORT_SYMBOL(scsi_cmd_ioctl);
 680