linux/drivers/cdrom/cdrom.c
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   1/* linux/drivers/cdrom/cdrom.c
   2   Copyright (c) 1996, 1997 David A. van Leeuwen.
   3   Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
   4   Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
   5
   6   May be copied or modified under the terms of the GNU General Public
   7   License.  See linux/COPYING for more information.
   8
   9   Uniform CD-ROM driver for Linux.
  10   See Documentation/cdrom/cdrom-standard.tex for usage information.
  11
  12   The routines in the file provide a uniform interface between the
  13   software that uses CD-ROMs and the various low-level drivers that
  14   actually talk to the hardware. Suggestions are welcome.
  15   Patches that work are more welcome though.  ;-)
  16
  17 To Do List:
  18 ----------------------------------
  19
  20 -- Modify sysctl/proc interface. I plan on having one directory per
  21 drive, with entries for outputing general drive information, and sysctl
  22 based tunable parameters such as whether the tray should auto-close for
  23 that drive. Suggestions (or patches) for this welcome!
  24
  25
  26 Revision History
  27 ----------------------------------
  28 1.00  Date Unknown -- David van Leeuwen <david@tm.tno.nl>
  29 -- Initial version by David A. van Leeuwen. I don't have a detailed
  30  changelog for the 1.x series, David?
  31
  322.00  Dec  2, 1997 -- Erik Andersen <andersee@debian.org>
  33  -- New maintainer! As David A. van Leeuwen has been too busy to actively
  34  maintain and improve this driver, I am now carrying on the torch. If
  35  you have a problem with this driver, please feel free to contact me.
  36
  37  -- Added (rudimentary) sysctl interface. I realize this is really weak
  38  right now, and is _very_ badly implemented. It will be improved...
  39
  40  -- Modified CDROM_DISC_STATUS so that it is now incorporated into
  41  the Uniform CD-ROM driver via the cdrom_count_tracks function.
  42  The cdrom_count_tracks function helps resolve some of the false
  43  assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
  44  for the correct media type when mounting or playing audio from a CD.
  45
  46  -- Remove the calls to verify_area and only use the copy_from_user and
  47  copy_to_user stuff, since these calls now provide their own memory
  48  checking with the 2.1.x kernels.
  49
  50  -- Major update to return codes so that errors from low-level drivers
  51  are passed on through (thanks to Gerd Knorr for pointing out this
  52  problem).
  53
  54  -- Made it so if a function isn't implemented in a low-level driver,
  55  ENOSYS is now returned instead of EINVAL.
  56
  57  -- Simplified some complex logic so that the source code is easier to read.
  58
  59  -- Other stuff I probably forgot to mention (lots of changes).
  60
  612.01 to 2.11 Dec 1997-Jan 1998
  62  -- TO-DO!  Write changelogs for 2.01 to 2.12.
  63
  642.12  Jan  24, 1998 -- Erik Andersen <andersee@debian.org>
  65  -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros.  It turns out that
  66  copy_*_user does not return EFAULT on error, but instead returns the number 
  67  of bytes not copied.  I was returning whatever non-zero stuff came back from 
  68  the copy_*_user functions directly, which would result in strange errors.
  69
  702.13  July 17, 1998 -- Erik Andersen <andersee@debian.org>
  71  -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
  72  of the drive.  Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
  73  this out and providing a simple fix.
  74  -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
  75  thanks to Andrea Arcangeli
  76  -- Fixed it so that the /proc entry now also shows up when cdrom is
  77  compiled into the kernel.  Before it only worked when loaded as a module.
  78
  79  2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
  80  -- Fixed a bug in cdrom_media_changed and handling of reporting that
  81  the media had changed for devices that _don't_ implement media_changed.  
  82  Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
  83  -- Made a few things more pedanticly correct.
  84
  852.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
  86  -- New maintainers! Erik was too busy to continue the work on the driver,
  87  so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
  88  will do their best to follow in his footsteps
  89  
  90  2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
  91  -- Check if drive is capable of doing what we ask before blindly changing
  92  cdi->options in various ioctl.
  93  -- Added version to proc entry.
  94  
  95  2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
  96  -- Fixed an error in open_for_data where we would sometimes not return
  97  the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
  98  -- Fixed module usage count - usage was based on /proc/sys/dev
  99  instead of /proc/sys/dev/cdrom. This could lead to an oops when other
 100  modules had entries in dev. Feb 02 - real bug was in sysctl.c where
 101  dev would be removed even though it was used. cdrom.c just illuminated
 102  that bug.
 103  
 104  2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
 105  -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
 106  been "rewritten" because capabilities and options aren't in sync. They
 107  should be...
 108  -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
 109  -- Added CDROM_RESET ioctl.
 110  -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
 111  -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
 112  from parsing /proc/sys/dev/cdrom/info.
 113  
 114  2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
 115  -- Check capability mask from low level driver when counting tracks as
 116  per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
 117  
 118  2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
 119  -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
 120  CDC_CLOSE_TRAY.
 121  -- proc info didn't mask against capabilities mask.
 122  
 123  3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
 124  -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
 125  code was duplicated before. Drives that support the generic packet
 126  interface are now being fed packets from here instead.
 127  -- First attempt at adding support for MMC2 commands - for DVD and
 128  CD-R(W) drives. Only the DVD parts are in now - the interface used is
 129  the same as for the audio ioctls.
 130  -- ioctl cleanups. if a drive couldn't play audio, it didn't get
 131  a change to perform device specific ioctls as well.
 132  -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
 133  -- Put in sysctl files for autoclose, autoeject, check_media, debug,
 134  and lock.
 135  -- /proc/sys/dev/cdrom/info has been updated to also contain info about
 136  CD-Rx and DVD capabilities.
 137  -- Now default to checking media type.
 138  -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
 139  doing this anyway, with the generic_packet addition.
 140  
 141  3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
 142  -- Fix up the sysctl handling so that the option flags get set
 143  correctly.
 144  -- Fix up ioctl handling so the device specific ones actually get
 145  called :).
 146  
 147  3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
 148  -- Fixed volume control on SCSI drives (or others with longer audio
 149  page).
 150  -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
 151  <andrewtv@usa.net> for telling me and for having defined the various
 152  DVD structures and ioctls in the first place! He designed the original
 153  DVD patches for ide-cd and while I rearranged and unified them, the
 154  interface is still the same.
 155  
 156  3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
 157  -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
 158  CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
 159  -- Moved the CDROMREADxxx ioctls in here.
 160  -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
 161  and exported functions.
 162  -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
 163  to now read GPCMD_ for the new generic packet interface. All low level
 164  drivers are updated as well.
 165  -- Various other cleanups.
 166
 167  3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
 168  -- Fixed a couple of possible memory leaks (if an operation failed and
 169  we didn't free the buffer before returning the error).
 170  -- Integrated Uniform CD Changer handling from Richard Sharman
 171  <rsharman@pobox.com>.
 172  -- Defined CD_DVD and CD_CHANGER log levels.
 173  -- Fixed the CDROMREADxxx ioctls.
 174  -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
 175  drives supported it. We lose the index part, however.
 176  -- Small modifications to accommodate opens of /dev/hdc1, required
 177  for ide-cd to handle multisession discs.
 178  -- Export cdrom_mode_sense and cdrom_mode_select.
 179  -- init_cdrom_command() for setting up a cgc command.
 180  
 181  3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
 182  -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
 183  impossible to send the drive data in a sensible way.
 184  -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
 185  dvd_read_manufact.
 186  -- Added setup of write mode for packet writing.
 187  -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
 188  number of frames and split the reads in blocks of 8.
 189
 190  3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
 191  -- Added support for changing the region of DVD drives.
 192  -- Added sense data to generic command.
 193
 194  3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
 195  -- Do same "read header length" trick in cdrom_get_disc_info() as
 196  we do in cdrom_get_track_info() -- some drive don't obey specs and
 197  fail if they can't supply the full Mt Fuji size table.
 198  -- Deleted stuff related to setting up write modes. It has a different
 199  home now.
 200  -- Clear header length in mode_select unconditionally.
 201  -- Removed the register_disk() that was added, not needed here.
 202
 203  3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
 204  -- Fix direction flag in setup_send_key and setup_report_key. This
 205  gave some SCSI adapters problems.
 206  -- Always return -EROFS for write opens
 207  -- Convert to module_init/module_exit style init and remove some
 208  of the #ifdef MODULE stuff
 209  -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
 210  DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
 211  dvd_do_auth passed uninitialized data to drive because init_cdrom_command
 212  did not clear a 0 sized buffer.
 213  
 214  3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
 215  -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
 216  that case switch block size and issue plain READ_10 again, then switch
 217  back.
 218
 219  3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
 220  -- Fix volume control on CD's - old SCSI-II drives now use their own
 221  code, as doing MODE6 stuff in here is really not my intention.
 222  -- Use READ_DISC_INFO for more reliable end-of-disc.
 223
 224  3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
 225  -- Fix bug in getting rpc phase 2 region info.
 226  -- Reinstate "correct" CDROMPLAYTRKIND
 227
 228   3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
 229  -- Use quiet bit on packet commands not known to work
 230
 231   3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
 232  -- Various fixes and lots of cleanups not listed :-)
 233  -- Locking fixes
 234  -- Mt Rainier support
 235  -- DVD-RAM write open fixes
 236
 237  Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
 238  <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
 239
 240  Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
 241  2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
 242
 243-------------------------------------------------------------------------*/
 244
 245#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 246
 247#define REVISION "Revision: 3.20"
 248#define VERSION "Id: cdrom.c 3.20 2003/12/17"
 249
 250/* I use an error-log mask to give fine grain control over the type of
 251   messages dumped to the system logs.  The available masks include: */
 252#define CD_NOTHING      0x0
 253#define CD_WARNING      0x1
 254#define CD_REG_UNREG    0x2
 255#define CD_DO_IOCTL     0x4
 256#define CD_OPEN         0x8
 257#define CD_CLOSE        0x10
 258#define CD_COUNT_TRACKS 0x20
 259#define CD_CHANGER      0x40
 260#define CD_DVD          0x80
 261
 262/* Define this to remove _all_ the debugging messages */
 263/* #define ERRLOGMASK CD_NOTHING */
 264#define ERRLOGMASK CD_WARNING
 265/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
 266/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
 267
 268#include <linux/module.h>
 269#include <linux/fs.h>
 270#include <linux/major.h>
 271#include <linux/types.h>
 272#include <linux/errno.h>
 273#include <linux/kernel.h>
 274#include <linux/mm.h>
 275#include <linux/slab.h> 
 276#include <linux/cdrom.h>
 277#include <linux/sysctl.h>
 278#include <linux/proc_fs.h>
 279#include <linux/blkpg.h>
 280#include <linux/init.h>
 281#include <linux/fcntl.h>
 282#include <linux/blkdev.h>
 283#include <linux/times.h>
 284#include <linux/uaccess.h>
 285#include <scsi/scsi_common.h>
 286#include <scsi/scsi_request.h>
 287
 288/* used to tell the module to turn on full debugging messages */
 289static bool debug;
 290/* default compatibility mode */
 291static bool autoclose=1;
 292static bool autoeject;
 293static bool lockdoor = 1;
 294/* will we ever get to use this... sigh. */
 295static bool check_media_type;
 296/* automatically restart mrw format */
 297static bool mrw_format_restart = 1;
 298module_param(debug, bool, 0);
 299module_param(autoclose, bool, 0);
 300module_param(autoeject, bool, 0);
 301module_param(lockdoor, bool, 0);
 302module_param(check_media_type, bool, 0);
 303module_param(mrw_format_restart, bool, 0);
 304
 305static DEFINE_MUTEX(cdrom_mutex);
 306
 307static const char *mrw_format_status[] = {
 308        "not mrw",
 309        "bgformat inactive",
 310        "bgformat active",
 311        "mrw complete",
 312};
 313
 314static const char *mrw_address_space[] = { "DMA", "GAA" };
 315
 316#if (ERRLOGMASK != CD_NOTHING)
 317#define cd_dbg(type, fmt, ...)                          \
 318do {                                                    \
 319        if ((ERRLOGMASK & type) || debug == 1)          \
 320                pr_debug(fmt, ##__VA_ARGS__);           \
 321} while (0)
 322#else
 323#define cd_dbg(type, fmt, ...)                          \
 324do {                                                    \
 325        if (0 && (ERRLOGMASK & type) || debug == 1)     \
 326                pr_debug(fmt, ##__VA_ARGS__);           \
 327} while (0)
 328#endif
 329
 330/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
 331   a lot of places. This macro makes the code more clear. */
 332#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
 333
 334/*
 335 * Another popular OS uses 7 seconds as the hard timeout for default
 336 * commands, so it is a good choice for us as well.
 337 */
 338#define CDROM_DEF_TIMEOUT       (7 * HZ)
 339
 340/* Not-exported routines. */
 341
 342static void cdrom_sysctl_register(void);
 343
 344static LIST_HEAD(cdrom_list);
 345
 346int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
 347                               struct packet_command *cgc)
 348{
 349        if (cgc->sshdr) {
 350                cgc->sshdr->sense_key = 0x05;
 351                cgc->sshdr->asc = 0x20;
 352                cgc->sshdr->ascq = 0x00;
 353        }
 354
 355        cgc->stat = -EIO;
 356        return -EIO;
 357}
 358EXPORT_SYMBOL(cdrom_dummy_generic_packet);
 359
 360static int cdrom_flush_cache(struct cdrom_device_info *cdi)
 361{
 362        struct packet_command cgc;
 363
 364        init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
 365        cgc.cmd[0] = GPCMD_FLUSH_CACHE;
 366
 367        cgc.timeout = 5 * 60 * HZ;
 368
 369        return cdi->ops->generic_packet(cdi, &cgc);
 370}
 371
 372/* requires CD R/RW */
 373static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
 374                               disc_information *di)
 375{
 376        const struct cdrom_device_ops *cdo = cdi->ops;
 377        struct packet_command cgc;
 378        int ret, buflen;
 379
 380        /* set up command and get the disc info */
 381        init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
 382        cgc.cmd[0] = GPCMD_READ_DISC_INFO;
 383        cgc.cmd[8] = cgc.buflen = 2;
 384        cgc.quiet = 1;
 385
 386        ret = cdo->generic_packet(cdi, &cgc);
 387        if (ret)
 388                return ret;
 389
 390        /* not all drives have the same disc_info length, so requeue
 391         * packet with the length the drive tells us it can supply
 392         */
 393        buflen = be16_to_cpu(di->disc_information_length) +
 394                sizeof(di->disc_information_length);
 395
 396        if (buflen > sizeof(disc_information))
 397                buflen = sizeof(disc_information);
 398
 399        cgc.cmd[8] = cgc.buflen = buflen;
 400        ret = cdo->generic_packet(cdi, &cgc);
 401        if (ret)
 402                return ret;
 403
 404        /* return actual fill size */
 405        return buflen;
 406}
 407
 408/* This macro makes sure we don't have to check on cdrom_device_ops
 409 * existence in the run-time routines below. Change_capability is a
 410 * hack to have the capability flags defined const, while we can still
 411 * change it here without gcc complaining at every line.
 412 */
 413#define ENSURE(call, bits)                      \
 414do {                                            \
 415        if (cdo->call == NULL)                  \
 416                *change_capability &= ~(bits);  \
 417} while (0)
 418
 419/*
 420 * the first prototypes used 0x2c as the page code for the mrw mode page,
 421 * subsequently this was changed to 0x03. probe the one used by this drive
 422 */
 423static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
 424{
 425        struct packet_command cgc;
 426        char buffer[16];
 427
 428        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
 429
 430        cgc.timeout = HZ;
 431        cgc.quiet = 1;
 432
 433        if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
 434                cdi->mrw_mode_page = MRW_MODE_PC;
 435                return 0;
 436        } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
 437                cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
 438                return 0;
 439        }
 440
 441        return 1;
 442}
 443
 444static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
 445{
 446        struct packet_command cgc;
 447        struct mrw_feature_desc *mfd;
 448        unsigned char buffer[16];
 449        int ret;
 450
 451        *write = 0;
 452
 453        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
 454
 455        cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
 456        cgc.cmd[3] = CDF_MRW;
 457        cgc.cmd[8] = sizeof(buffer);
 458        cgc.quiet = 1;
 459
 460        if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
 461                return ret;
 462
 463        mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
 464        if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
 465                return 1;
 466        *write = mfd->write;
 467
 468        if ((ret = cdrom_mrw_probe_pc(cdi))) {
 469                *write = 0;
 470                return ret;
 471        }
 472
 473        return 0;
 474}
 475
 476static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
 477{
 478        struct packet_command cgc;
 479        unsigned char buffer[12];
 480        int ret;
 481
 482        pr_info("%sstarting format\n", cont ? "Re" : "");
 483
 484        /*
 485         * FmtData bit set (bit 4), format type is 1
 486         */
 487        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
 488        cgc.cmd[0] = GPCMD_FORMAT_UNIT;
 489        cgc.cmd[1] = (1 << 4) | 1;
 490
 491        cgc.timeout = 5 * 60 * HZ;
 492
 493        /*
 494         * 4 byte format list header, 8 byte format list descriptor
 495         */
 496        buffer[1] = 1 << 1;
 497        buffer[3] = 8;
 498
 499        /*
 500         * nr_blocks field
 501         */
 502        buffer[4] = 0xff;
 503        buffer[5] = 0xff;
 504        buffer[6] = 0xff;
 505        buffer[7] = 0xff;
 506
 507        buffer[8] = 0x24 << 2;
 508        buffer[11] = cont;
 509
 510        ret = cdi->ops->generic_packet(cdi, &cgc);
 511        if (ret)
 512                pr_info("bgformat failed\n");
 513
 514        return ret;
 515}
 516
 517static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
 518{
 519        struct packet_command cgc;
 520
 521        init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
 522        cgc.cmd[0] = GPCMD_CLOSE_TRACK;
 523
 524        /*
 525         * Session = 1, Track = 0
 526         */
 527        cgc.cmd[1] = !!immed;
 528        cgc.cmd[2] = 1 << 1;
 529
 530        cgc.timeout = 5 * 60 * HZ;
 531
 532        return cdi->ops->generic_packet(cdi, &cgc);
 533}
 534
 535static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
 536{
 537        disc_information di;
 538        int ret;
 539
 540        ret = cdrom_get_disc_info(cdi, &di);
 541        if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
 542                return 1;
 543
 544        ret = 0;
 545        if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
 546                pr_info("issuing MRW background format suspend\n");
 547                ret = cdrom_mrw_bgformat_susp(cdi, 0);
 548        }
 549
 550        if (!ret && cdi->media_written)
 551                ret = cdrom_flush_cache(cdi);
 552
 553        return ret;
 554}
 555
 556static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
 557{
 558        struct packet_command cgc;
 559        struct mode_page_header *mph;
 560        char buffer[16];
 561        int ret, offset, size;
 562
 563        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
 564
 565        cgc.buffer = buffer;
 566        cgc.buflen = sizeof(buffer);
 567
 568        ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
 569        if (ret)
 570                return ret;
 571
 572        mph = (struct mode_page_header *)buffer;
 573        offset = be16_to_cpu(mph->desc_length);
 574        size = be16_to_cpu(mph->mode_data_length) + 2;
 575
 576        buffer[offset + 3] = space;
 577        cgc.buflen = size;
 578
 579        ret = cdrom_mode_select(cdi, &cgc);
 580        if (ret)
 581                return ret;
 582
 583        pr_info("%s: mrw address space %s selected\n",
 584                cdi->name, mrw_address_space[space]);
 585        return 0;
 586}
 587
 588int register_cdrom(struct cdrom_device_info *cdi)
 589{
 590        static char banner_printed;
 591        const struct cdrom_device_ops *cdo = cdi->ops;
 592        int *change_capability = (int *)&cdo->capability; /* hack */
 593
 594        cd_dbg(CD_OPEN, "entering register_cdrom\n");
 595
 596        if (cdo->open == NULL || cdo->release == NULL)
 597                return -EINVAL;
 598        if (!banner_printed) {
 599                pr_info("Uniform CD-ROM driver " REVISION "\n");
 600                banner_printed = 1;
 601                cdrom_sysctl_register();
 602        }
 603
 604        ENSURE(drive_status, CDC_DRIVE_STATUS);
 605        if (cdo->check_events == NULL && cdo->media_changed == NULL)
 606                *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
 607        ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
 608        ENSURE(lock_door, CDC_LOCK);
 609        ENSURE(select_speed, CDC_SELECT_SPEED);
 610        ENSURE(get_last_session, CDC_MULTI_SESSION);
 611        ENSURE(get_mcn, CDC_MCN);
 612        ENSURE(reset, CDC_RESET);
 613        ENSURE(generic_packet, CDC_GENERIC_PACKET);
 614        cdi->mc_flags = 0;
 615        cdi->options = CDO_USE_FFLAGS;
 616
 617        if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
 618                cdi->options |= (int) CDO_AUTO_CLOSE;
 619        if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
 620                cdi->options |= (int) CDO_AUTO_EJECT;
 621        if (lockdoor == 1)
 622                cdi->options |= (int) CDO_LOCK;
 623        if (check_media_type == 1)
 624                cdi->options |= (int) CDO_CHECK_TYPE;
 625
 626        if (CDROM_CAN(CDC_MRW_W))
 627                cdi->exit = cdrom_mrw_exit;
 628
 629        if (cdi->disk)
 630                cdi->cdda_method = CDDA_BPC_FULL;
 631        else
 632                cdi->cdda_method = CDDA_OLD;
 633
 634        WARN_ON(!cdo->generic_packet);
 635
 636        cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
 637        mutex_lock(&cdrom_mutex);
 638        list_add(&cdi->list, &cdrom_list);
 639        mutex_unlock(&cdrom_mutex);
 640        return 0;
 641}
 642#undef ENSURE
 643
 644void unregister_cdrom(struct cdrom_device_info *cdi)
 645{
 646        cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
 647
 648        mutex_lock(&cdrom_mutex);
 649        list_del(&cdi->list);
 650        mutex_unlock(&cdrom_mutex);
 651
 652        if (cdi->exit)
 653                cdi->exit(cdi);
 654
 655        cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
 656}
 657
 658int cdrom_get_media_event(struct cdrom_device_info *cdi,
 659                          struct media_event_desc *med)
 660{
 661        struct packet_command cgc;
 662        unsigned char buffer[8];
 663        struct event_header *eh = (struct event_header *)buffer;
 664
 665        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
 666        cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
 667        cgc.cmd[1] = 1;         /* IMMED */
 668        cgc.cmd[4] = 1 << 4;    /* media event */
 669        cgc.cmd[8] = sizeof(buffer);
 670        cgc.quiet = 1;
 671
 672        if (cdi->ops->generic_packet(cdi, &cgc))
 673                return 1;
 674
 675        if (be16_to_cpu(eh->data_len) < sizeof(*med))
 676                return 1;
 677
 678        if (eh->nea || eh->notification_class != 0x4)
 679                return 1;
 680
 681        memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
 682        return 0;
 683}
 684
 685static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
 686                              struct rwrt_feature_desc *rfd)
 687{
 688        struct packet_command cgc;
 689        char buffer[24];
 690        int ret;
 691
 692        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
 693
 694        cgc.cmd[0] = GPCMD_GET_CONFIGURATION;   /* often 0x46 */
 695        cgc.cmd[3] = CDF_RWRT;                  /* often 0x0020 */
 696        cgc.cmd[8] = sizeof(buffer);            /* often 0x18 */
 697        cgc.quiet = 1;
 698
 699        if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
 700                return ret;
 701
 702        memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
 703        return 0;
 704}
 705
 706static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
 707{
 708        struct packet_command cgc;
 709        char buffer[16];
 710        __be16 *feature_code;
 711        int ret;
 712
 713        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
 714
 715        cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
 716        cgc.cmd[3] = CDF_HWDM;
 717        cgc.cmd[8] = sizeof(buffer);
 718        cgc.quiet = 1;
 719
 720        if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
 721                return ret;
 722
 723        feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
 724        if (be16_to_cpu(*feature_code) == CDF_HWDM)
 725                return 0;
 726
 727        return 1;
 728}
 729
 730
 731static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
 732{
 733        struct rwrt_feature_desc rfd;
 734        int ret;
 735
 736        *write = 0;
 737
 738        if ((ret = cdrom_get_random_writable(cdi, &rfd)))
 739                return ret;
 740
 741        if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
 742                *write = 1;
 743
 744        return 0;
 745}
 746
 747static int cdrom_media_erasable(struct cdrom_device_info *cdi)
 748{
 749        disc_information di;
 750        int ret;
 751
 752        ret = cdrom_get_disc_info(cdi, &di);
 753        if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
 754                return -1;
 755
 756        return di.erasable;
 757}
 758
 759/*
 760 * FIXME: check RO bit
 761 */
 762static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
 763{
 764        int ret = cdrom_media_erasable(cdi);
 765
 766        /*
 767         * allow writable open if media info read worked and media is
 768         * erasable, _or_ if it fails since not all drives support it
 769         */
 770        if (!ret)
 771                return 1;
 772
 773        return 0;
 774}
 775
 776static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
 777{
 778        disc_information di;
 779        int ret;
 780
 781        /*
 782         * always reset to DMA lba space on open
 783         */
 784        if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
 785                pr_err("failed setting lba address space\n");
 786                return 1;
 787        }
 788
 789        ret = cdrom_get_disc_info(cdi, &di);
 790        if (ret < 0 || ret < offsetof(typeof(di),disc_type))
 791                return 1;
 792
 793        if (!di.erasable)
 794                return 1;
 795
 796        /*
 797         * mrw_status
 798         * 0    -       not MRW formatted
 799         * 1    -       MRW bgformat started, but not running or complete
 800         * 2    -       MRW bgformat in progress
 801         * 3    -       MRW formatting complete
 802         */
 803        ret = 0;
 804        pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
 805        if (!di.mrw_status)
 806                ret = 1;
 807        else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
 808                        mrw_format_restart)
 809                ret = cdrom_mrw_bgformat(cdi, 1);
 810
 811        return ret;
 812}
 813
 814static int mo_open_write(struct cdrom_device_info *cdi)
 815{
 816        struct packet_command cgc;
 817        char buffer[255];
 818        int ret;
 819
 820        init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
 821        cgc.quiet = 1;
 822
 823        /*
 824         * obtain write protect information as per
 825         * drivers/scsi/sd.c:sd_read_write_protect_flag
 826         */
 827
 828        ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
 829        if (ret)
 830                ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
 831        if (ret) {
 832                cgc.buflen = 255;
 833                ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
 834        }
 835
 836        /* drive gave us no info, let the user go ahead */
 837        if (ret)
 838                return 0;
 839
 840        return buffer[3] & 0x80;
 841}
 842
 843static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
 844{
 845        struct rwrt_feature_desc rfd;
 846        int ret;
 847
 848        if ((ret = cdrom_has_defect_mgt(cdi)))
 849                return ret;
 850
 851        if ((ret = cdrom_get_random_writable(cdi, &rfd)))
 852                return ret;
 853        else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
 854                ret = !rfd.curr;
 855
 856        cd_dbg(CD_OPEN, "can open for random write\n");
 857        return ret;
 858}
 859
 860static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
 861{
 862        struct packet_command cgc;
 863        char buffer[32];
 864        int ret, mmc3_profile;
 865
 866        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
 867
 868        cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
 869        cgc.cmd[1] = 0;
 870        cgc.cmd[2] = cgc.cmd[3] = 0;            /* Starting Feature Number */
 871        cgc.cmd[8] = sizeof(buffer);            /* Allocation Length */
 872        cgc.quiet = 1;
 873
 874        if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
 875                mmc3_profile = 0xffff;
 876        else
 877                mmc3_profile = (buffer[6] << 8) | buffer[7];
 878
 879        cdi->mmc3_profile = mmc3_profile;
 880}
 881
 882static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
 883{
 884        switch (cdi->mmc3_profile) {
 885        case 0x12:      /* DVD-RAM      */
 886        case 0x1A:      /* DVD+RW       */
 887        case 0x43:      /* BD-RE        */
 888                return 0;
 889        default:
 890                return 1;
 891        }
 892}
 893
 894/*
 895 * returns 0 for ok to open write, non-0 to disallow
 896 */
 897static int cdrom_open_write(struct cdrom_device_info *cdi)
 898{
 899        int mrw, mrw_write, ram_write;
 900        int ret = 1;
 901
 902        mrw = 0;
 903        if (!cdrom_is_mrw(cdi, &mrw_write))
 904                mrw = 1;
 905
 906        if (CDROM_CAN(CDC_MO_DRIVE))
 907                ram_write = 1;
 908        else
 909                (void) cdrom_is_random_writable(cdi, &ram_write);
 910        
 911        if (mrw)
 912                cdi->mask &= ~CDC_MRW;
 913        else
 914                cdi->mask |= CDC_MRW;
 915
 916        if (mrw_write)
 917                cdi->mask &= ~CDC_MRW_W;
 918        else
 919                cdi->mask |= CDC_MRW_W;
 920
 921        if (ram_write)
 922                cdi->mask &= ~CDC_RAM;
 923        else
 924                cdi->mask |= CDC_RAM;
 925
 926        if (CDROM_CAN(CDC_MRW_W))
 927                ret = cdrom_mrw_open_write(cdi);
 928        else if (CDROM_CAN(CDC_DVD_RAM))
 929                ret = cdrom_dvdram_open_write(cdi);
 930        else if (CDROM_CAN(CDC_RAM) &&
 931                 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
 932                ret = cdrom_ram_open_write(cdi);
 933        else if (CDROM_CAN(CDC_MO_DRIVE))
 934                ret = mo_open_write(cdi);
 935        else if (!cdrom_is_dvd_rw(cdi))
 936                ret = 0;
 937
 938        return ret;
 939}
 940
 941static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
 942{
 943        struct packet_command cgc;
 944
 945        if (cdi->mmc3_profile != 0x1a) {
 946                cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
 947                return;
 948        }
 949
 950        if (!cdi->media_written) {
 951                cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
 952                return;
 953        }
 954
 955        pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
 956
 957        init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
 958        cgc.cmd[0] = GPCMD_FLUSH_CACHE;
 959        cgc.timeout = 30*HZ;
 960        cdi->ops->generic_packet(cdi, &cgc);
 961
 962        init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
 963        cgc.cmd[0] = GPCMD_CLOSE_TRACK;
 964        cgc.timeout = 3000*HZ;
 965        cgc.quiet = 1;
 966        cdi->ops->generic_packet(cdi, &cgc);
 967
 968        init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
 969        cgc.cmd[0] = GPCMD_CLOSE_TRACK;
 970        cgc.cmd[2] = 2;  /* Close session */
 971        cgc.quiet = 1;
 972        cgc.timeout = 3000*HZ;
 973        cdi->ops->generic_packet(cdi, &cgc);
 974
 975        cdi->media_written = 0;
 976}
 977
 978static int cdrom_close_write(struct cdrom_device_info *cdi)
 979{
 980#if 0
 981        return cdrom_flush_cache(cdi);
 982#else
 983        return 0;
 984#endif
 985}
 986
 987/* badly broken, I know. Is due for a fixup anytime. */
 988static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
 989{
 990        struct cdrom_tochdr header;
 991        struct cdrom_tocentry entry;
 992        int ret, i;
 993        tracks->data = 0;
 994        tracks->audio = 0;
 995        tracks->cdi = 0;
 996        tracks->xa = 0;
 997        tracks->error = 0;
 998        cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
 999        /* Grab the TOC header so we can see how many tracks there are */
1000        ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1001        if (ret) {
1002                if (ret == -ENOMEDIUM)
1003                        tracks->error = CDS_NO_DISC;
1004                else
1005                        tracks->error = CDS_NO_INFO;
1006                return;
1007        }
1008        /* check what type of tracks are on this disc */
1009        entry.cdte_format = CDROM_MSF;
1010        for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1011                entry.cdte_track = i;
1012                if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1013                        tracks->error = CDS_NO_INFO;
1014                        return;
1015                }
1016                if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1017                        if (entry.cdte_format == 0x10)
1018                                tracks->cdi++;
1019                        else if (entry.cdte_format == 0x20)
1020                                tracks->xa++;
1021                        else
1022                                tracks->data++;
1023                } else {
1024                        tracks->audio++;
1025                }
1026                cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1027                       i, entry.cdte_format, entry.cdte_ctrl);
1028        }
1029        cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1030               header.cdth_trk1, tracks->audio, tracks->data,
1031               tracks->cdi, tracks->xa);
1032}
1033
1034static
1035int open_for_data(struct cdrom_device_info *cdi)
1036{
1037        int ret;
1038        const struct cdrom_device_ops *cdo = cdi->ops;
1039        tracktype tracks;
1040        cd_dbg(CD_OPEN, "entering open_for_data\n");
1041        /* Check if the driver can report drive status.  If it can, we
1042           can do clever things.  If it can't, well, we at least tried! */
1043        if (cdo->drive_status != NULL) {
1044                ret = cdo->drive_status(cdi, CDSL_CURRENT);
1045                cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1046                if (ret == CDS_TRAY_OPEN) {
1047                        cd_dbg(CD_OPEN, "the tray is open...\n");
1048                        /* can/may i close it? */
1049                        if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1050                            cdi->options & CDO_AUTO_CLOSE) {
1051                                cd_dbg(CD_OPEN, "trying to close the tray\n");
1052                                ret=cdo->tray_move(cdi,0);
1053                                if (ret) {
1054                                        cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1055                                        /* Ignore the error from the low
1056                                        level driver.  We don't care why it
1057                                        couldn't close the tray.  We only care 
1058                                        that there is no disc in the drive, 
1059                                        since that is the _REAL_ problem here.*/
1060                                        ret=-ENOMEDIUM;
1061                                        goto clean_up_and_return;
1062                                }
1063                        } else {
1064                                cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1065                                ret=-ENOMEDIUM;
1066                                goto clean_up_and_return;
1067                        }
1068                        /* Ok, the door should be closed now.. Check again */
1069                        ret = cdo->drive_status(cdi, CDSL_CURRENT);
1070                        if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1071                                cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1072                                cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1073                                ret=-ENOMEDIUM;
1074                                goto clean_up_and_return;
1075                        }
1076                        cd_dbg(CD_OPEN, "the tray is now closed\n");
1077                }
1078                /* the door should be closed now, check for the disc */
1079                ret = cdo->drive_status(cdi, CDSL_CURRENT);
1080                if (ret!=CDS_DISC_OK) {
1081                        ret = -ENOMEDIUM;
1082                        goto clean_up_and_return;
1083                }
1084        }
1085        cdrom_count_tracks(cdi, &tracks);
1086        if (tracks.error == CDS_NO_DISC) {
1087                cd_dbg(CD_OPEN, "bummer. no disc.\n");
1088                ret=-ENOMEDIUM;
1089                goto clean_up_and_return;
1090        }
1091        /* CD-Players which don't use O_NONBLOCK, workman
1092         * for example, need bit CDO_CHECK_TYPE cleared! */
1093        if (tracks.data==0) {
1094                if (cdi->options & CDO_CHECK_TYPE) {
1095                    /* give people a warning shot, now that CDO_CHECK_TYPE
1096                       is the default case! */
1097                    cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1098                    cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1099                           (unsigned int)task_pid_nr(current));
1100                    ret=-EMEDIUMTYPE;
1101                    goto clean_up_and_return;
1102                }
1103                else {
1104                    cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1105                }
1106        }
1107
1108        cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1109
1110        /* all seems well, we can open the device */
1111        ret = cdo->open(cdi, 0); /* open for data */
1112        cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1113        /* After all this careful checking, we shouldn't have problems
1114           opening the device, but we don't want the device locked if 
1115           this somehow fails... */
1116        if (ret) {
1117                cd_dbg(CD_OPEN, "open device failed\n");
1118                goto clean_up_and_return;
1119        }
1120        if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1121                        cdo->lock_door(cdi, 1);
1122                        cd_dbg(CD_OPEN, "door locked\n");
1123        }
1124        cd_dbg(CD_OPEN, "device opened successfully\n");
1125        return ret;
1126
1127        /* Something failed.  Try to unlock the drive, because some drivers
1128        (notably ide-cd) lock the drive after every command.  This produced
1129        a nasty bug where after mount failed, the drive would remain locked!  
1130        This ensures that the drive gets unlocked after a mount fails.  This 
1131        is a goto to avoid bloating the driver with redundant code. */ 
1132clean_up_and_return:
1133        cd_dbg(CD_OPEN, "open failed\n");
1134        if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1135                        cdo->lock_door(cdi, 0);
1136                        cd_dbg(CD_OPEN, "door unlocked\n");
1137        }
1138        return ret;
1139}
1140
1141/* We use the open-option O_NONBLOCK to indicate that the
1142 * purpose of opening is only for subsequent ioctl() calls; no device
1143 * integrity checks are performed.
1144 *
1145 * We hope that all cd-player programs will adopt this convention. It
1146 * is in their own interest: device control becomes a lot easier
1147 * this way.
1148 */
1149int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1150               fmode_t mode)
1151{
1152        int ret;
1153
1154        cd_dbg(CD_OPEN, "entering cdrom_open\n");
1155
1156        /* if this was a O_NONBLOCK open and we should honor the flags,
1157         * do a quick open without drive/disc integrity checks. */
1158        cdi->use_count++;
1159        if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1160                ret = cdi->ops->open(cdi, 1);
1161        } else {
1162                ret = open_for_data(cdi);
1163                if (ret)
1164                        goto err;
1165                cdrom_mmc3_profile(cdi);
1166                if (mode & FMODE_WRITE) {
1167                        ret = -EROFS;
1168                        if (cdrom_open_write(cdi))
1169                                goto err_release;
1170                        if (!CDROM_CAN(CDC_RAM))
1171                                goto err_release;
1172                        ret = 0;
1173                        cdi->media_written = 0;
1174                }
1175        }
1176
1177        if (ret)
1178                goto err;
1179
1180        cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1181               cdi->name, cdi->use_count);
1182        return 0;
1183err_release:
1184        if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1185                cdi->ops->lock_door(cdi, 0);
1186                cd_dbg(CD_OPEN, "door unlocked\n");
1187        }
1188        cdi->ops->release(cdi);
1189err:
1190        cdi->use_count--;
1191        return ret;
1192}
1193
1194/* This code is similar to that in open_for_data. The routine is called
1195   whenever an audio play operation is requested.
1196*/
1197static int check_for_audio_disc(struct cdrom_device_info *cdi,
1198                                const struct cdrom_device_ops *cdo)
1199{
1200        int ret;
1201        tracktype tracks;
1202        cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1203        if (!(cdi->options & CDO_CHECK_TYPE))
1204                return 0;
1205        if (cdo->drive_status != NULL) {
1206                ret = cdo->drive_status(cdi, CDSL_CURRENT);
1207                cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1208                if (ret == CDS_TRAY_OPEN) {
1209                        cd_dbg(CD_OPEN, "the tray is open...\n");
1210                        /* can/may i close it? */
1211                        if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1212                            cdi->options & CDO_AUTO_CLOSE) {
1213                                cd_dbg(CD_OPEN, "trying to close the tray\n");
1214                                ret=cdo->tray_move(cdi,0);
1215                                if (ret) {
1216                                        cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1217                                        /* Ignore the error from the low
1218                                        level driver.  We don't care why it
1219                                        couldn't close the tray.  We only care 
1220                                        that there is no disc in the drive, 
1221                                        since that is the _REAL_ problem here.*/
1222                                        return -ENOMEDIUM;
1223                                }
1224                        } else {
1225                                cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1226                                return -ENOMEDIUM;
1227                        }
1228                        /* Ok, the door should be closed now.. Check again */
1229                        ret = cdo->drive_status(cdi, CDSL_CURRENT);
1230                        if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1231                                cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1232                                return -ENOMEDIUM;
1233                        }       
1234                        if (ret!=CDS_DISC_OK) {
1235                                cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1236                                return -EIO;
1237                        }       
1238                        cd_dbg(CD_OPEN, "the tray is now closed\n");
1239                }       
1240        }
1241        cdrom_count_tracks(cdi, &tracks);
1242        if (tracks.error) 
1243                return(tracks.error);
1244
1245        if (tracks.audio==0)
1246                return -EMEDIUMTYPE;
1247
1248        return 0;
1249}
1250
1251void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1252{
1253        const struct cdrom_device_ops *cdo = cdi->ops;
1254        int opened_for_data;
1255
1256        cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1257
1258        if (cdi->use_count > 0)
1259                cdi->use_count--;
1260
1261        if (cdi->use_count == 0) {
1262                cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1263                       cdi->name);
1264                cdrom_dvd_rw_close_write(cdi);
1265
1266                if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1267                        cd_dbg(CD_CLOSE, "Unlocking door!\n");
1268                        cdo->lock_door(cdi, 0);
1269                }
1270        }
1271
1272        opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1273                !(mode & FMODE_NDELAY);
1274
1275        /*
1276         * flush cache on last write release
1277         */
1278        if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1279                cdrom_close_write(cdi);
1280
1281        cdo->release(cdi);
1282        if (cdi->use_count == 0) {      /* last process that closes dev*/
1283                if (opened_for_data &&
1284                    cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1285                        cdo->tray_move(cdi, 1);
1286        }
1287}
1288
1289static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 
1290                                  struct cdrom_changer_info *buf)
1291{
1292        struct packet_command cgc;
1293        const struct cdrom_device_ops *cdo = cdi->ops;
1294        int length;
1295
1296        /*
1297         * Sanyo changer isn't spec compliant (doesn't use regular change
1298         * LOAD_UNLOAD command, and it doesn't implement the mech status
1299         * command below
1300         */
1301        if (cdi->sanyo_slot) {
1302                buf->hdr.nslots = 3;
1303                buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1304                for (length = 0; length < 3; length++) {
1305                        buf->slots[length].disc_present = 1;
1306                        buf->slots[length].change = 0;
1307                }
1308                return 0;
1309        }
1310
1311        length = sizeof(struct cdrom_mechstat_header) +
1312                 cdi->capacity * sizeof(struct cdrom_slot);
1313
1314        init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1315        cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1316        cgc.cmd[8] = (length >> 8) & 0xff;
1317        cgc.cmd[9] = length & 0xff;
1318        return cdo->generic_packet(cdi, &cgc);
1319}
1320
1321static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1322{
1323        struct cdrom_changer_info *info;
1324        int ret;
1325
1326        cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1327        if (cdi->sanyo_slot)
1328                return CDS_NO_INFO;
1329        
1330        info = kmalloc(sizeof(*info), GFP_KERNEL);
1331        if (!info)
1332                return -ENOMEM;
1333
1334        if ((ret = cdrom_read_mech_status(cdi, info)))
1335                goto out_free;
1336
1337        if (info->slots[slot].disc_present)
1338                ret = CDS_DISC_OK;
1339        else
1340                ret = CDS_NO_DISC;
1341
1342out_free:
1343        kfree(info);
1344        return ret;
1345}
1346
1347/* Return the number of slots for an ATAPI/SCSI cdrom, 
1348 * return 1 if not a changer. 
1349 */
1350int cdrom_number_of_slots(struct cdrom_device_info *cdi) 
1351{
1352        int status;
1353        int nslots = 1;
1354        struct cdrom_changer_info *info;
1355
1356        cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1357        /* cdrom_read_mech_status requires a valid value for capacity: */
1358        cdi->capacity = 0; 
1359
1360        info = kmalloc(sizeof(*info), GFP_KERNEL);
1361        if (!info)
1362                return -ENOMEM;
1363
1364        if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1365                nslots = info->hdr.nslots;
1366
1367        kfree(info);
1368        return nslots;
1369}
1370
1371
1372/* If SLOT < 0, unload the current slot.  Otherwise, try to load SLOT. */
1373static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 
1374{
1375        struct packet_command cgc;
1376
1377        cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1378        if (cdi->sanyo_slot && slot < 0)
1379                return 0;
1380
1381        init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1382        cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1383        cgc.cmd[4] = 2 + (slot >= 0);
1384        cgc.cmd[8] = slot;
1385        cgc.timeout = 60 * HZ;
1386
1387        /* The Sanyo 3 CD changer uses byte 7 of the 
1388        GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1389        using the GPCMD_LOAD_UNLOAD opcode. */
1390        if (cdi->sanyo_slot && -1 < slot) {
1391                cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1392                cgc.cmd[7] = slot;
1393                cgc.cmd[4] = cgc.cmd[8] = 0;
1394                cdi->sanyo_slot = slot ? slot : 3;
1395        }
1396
1397        return cdi->ops->generic_packet(cdi, &cgc);
1398}
1399
1400static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1401{
1402        struct cdrom_changer_info *info;
1403        int curslot;
1404        int ret;
1405
1406        cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1407        if (!CDROM_CAN(CDC_SELECT_DISC))
1408                return -EDRIVE_CANT_DO_THIS;
1409
1410        if (cdi->ops->check_events)
1411                cdi->ops->check_events(cdi, 0, slot);
1412        else
1413                cdi->ops->media_changed(cdi, slot);
1414
1415        if (slot == CDSL_NONE) {
1416                /* set media changed bits, on both queues */
1417                cdi->mc_flags = 0x3;
1418                return cdrom_load_unload(cdi, -1);
1419        }
1420
1421        info = kmalloc(sizeof(*info), GFP_KERNEL);
1422        if (!info)
1423                return -ENOMEM;
1424
1425        if ((ret = cdrom_read_mech_status(cdi, info))) {
1426                kfree(info);
1427                return ret;
1428        }
1429
1430        curslot = info->hdr.curslot;
1431        kfree(info);
1432
1433        if (cdi->use_count > 1 || cdi->keeplocked) {
1434                if (slot == CDSL_CURRENT) {
1435                        return curslot;
1436                } else {
1437                        return -EBUSY;
1438                }
1439        }
1440
1441        /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1442        which is useful if it had been previously unloaded.
1443        Whether it can or not, it returns the current slot. 
1444        Similarly,  if slot happens to be the current one, we still
1445        try and load it. */
1446        if (slot == CDSL_CURRENT)
1447                slot = curslot;
1448
1449        /* set media changed bits on both queues */
1450        cdi->mc_flags = 0x3;
1451        if ((ret = cdrom_load_unload(cdi, slot)))
1452                return ret;
1453
1454        return slot;
1455}
1456
1457/*
1458 * As cdrom implements an extra ioctl consumer for media changed
1459 * event, it needs to buffer ->check_events() output, such that event
1460 * is not lost for both the usual VFS and ioctl paths.
1461 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1462 * path.
1463 *
1464 * XXX: Locking is non-existent.  cdi->ops->check_events() can be
1465 * called in parallel and buffering fields are accessed without any
1466 * exclusion.  The original media_changed code had the same problem.
1467 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1468 * and remove this cruft altogether.  It doesn't have much usefulness
1469 * at this point.
1470 */
1471static void cdrom_update_events(struct cdrom_device_info *cdi,
1472                                unsigned int clearing)
1473{
1474        unsigned int events;
1475
1476        events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1477        cdi->vfs_events |= events;
1478        cdi->ioctl_events |= events;
1479}
1480
1481unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1482                                unsigned int clearing)
1483{
1484        unsigned int events;
1485
1486        cdrom_update_events(cdi, clearing);
1487        events = cdi->vfs_events;
1488        cdi->vfs_events = 0;
1489        return events;
1490}
1491EXPORT_SYMBOL(cdrom_check_events);
1492
1493/* We want to make media_changed accessible to the user through an
1494 * ioctl. The main problem now is that we must double-buffer the
1495 * low-level implementation, to assure that the VFS and the user both
1496 * see a medium change once.
1497 */
1498
1499static
1500int media_changed(struct cdrom_device_info *cdi, int queue)
1501{
1502        unsigned int mask = (1 << (queue & 1));
1503        int ret = !!(cdi->mc_flags & mask);
1504        bool changed;
1505
1506        if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1507                return ret;
1508
1509        /* changed since last call? */
1510        if (cdi->ops->check_events) {
1511                BUG_ON(!queue); /* shouldn't be called from VFS path */
1512                cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1513                changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1514                cdi->ioctl_events = 0;
1515        } else
1516                changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1517
1518        if (changed) {
1519                cdi->mc_flags = 0x3;    /* set bit on both queues */
1520                ret |= 1;
1521                cdi->media_written = 0;
1522        }
1523
1524        cdi->mc_flags &= ~mask;         /* clear bit */
1525        return ret;
1526}
1527
1528int cdrom_media_changed(struct cdrom_device_info *cdi)
1529{
1530        /* This talks to the VFS, which doesn't like errors - just 1 or 0.  
1531         * Returning "0" is always safe (media hasn't been changed). Do that 
1532         * if the low-level cdrom driver dosn't support media changed. */ 
1533        if (cdi == NULL || cdi->ops->media_changed == NULL)
1534                return 0;
1535        if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1536                return 0;
1537        return media_changed(cdi, 0);
1538}
1539
1540/* Requests to the low-level drivers will /always/ be done in the
1541   following format convention:
1542
1543   CDROM_LBA: all data-related requests.
1544   CDROM_MSF: all audio-related requests.
1545
1546   However, a low-level implementation is allowed to refuse this
1547   request, and return information in its own favorite format.
1548
1549   It doesn't make sense /at all/ to ask for a play_audio in LBA
1550   format, or ask for multi-session info in MSF format. However, for
1551   backward compatibility these format requests will be satisfied, but
1552   the requests to the low-level drivers will be sanitized in the more
1553   meaningful format indicated above.
1554 */
1555
1556static
1557void sanitize_format(union cdrom_addr *addr,
1558                     u_char * curr, u_char requested)
1559{
1560        if (*curr == requested)
1561                return;                 /* nothing to be done! */
1562        if (requested == CDROM_LBA) {
1563                addr->lba = (int) addr->msf.frame +
1564                        75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1565        } else {                        /* CDROM_MSF */
1566                int lba = addr->lba;
1567                addr->msf.frame = lba % 75;
1568                lba /= 75;
1569                lba += 2;
1570                addr->msf.second = lba % 60;
1571                addr->msf.minute = lba / 60;
1572        }
1573        *curr = requested;
1574}
1575
1576void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1577                        int type)
1578{
1579        memset(cgc, 0, sizeof(struct packet_command));
1580        if (buf)
1581                memset(buf, 0, len);
1582        cgc->buffer = (char *) buf;
1583        cgc->buflen = len;
1584        cgc->data_direction = type;
1585        cgc->timeout = CDROM_DEF_TIMEOUT;
1586}
1587
1588/* DVD handling */
1589
1590#define copy_key(dest,src)      memcpy((dest), (src), sizeof(dvd_key))
1591#define copy_chal(dest,src)     memcpy((dest), (src), sizeof(dvd_challenge))
1592
1593static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1594{
1595        cgc->cmd[0] = GPCMD_REPORT_KEY;
1596        cgc->cmd[10] = type | (agid << 6);
1597        switch (type) {
1598                case 0: case 8: case 5: {
1599                        cgc->buflen = 8;
1600                        break;
1601                }
1602                case 1: {
1603                        cgc->buflen = 16;
1604                        break;
1605                }
1606                case 2: case 4: {
1607                        cgc->buflen = 12;
1608                        break;
1609                }
1610        }
1611        cgc->cmd[9] = cgc->buflen;
1612        cgc->data_direction = CGC_DATA_READ;
1613}
1614
1615static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1616{
1617        cgc->cmd[0] = GPCMD_SEND_KEY;
1618        cgc->cmd[10] = type | (agid << 6);
1619        switch (type) {
1620                case 1: {
1621                        cgc->buflen = 16;
1622                        break;
1623                }
1624                case 3: {
1625                        cgc->buflen = 12;
1626                        break;
1627                }
1628                case 6: {
1629                        cgc->buflen = 8;
1630                        break;
1631                }
1632        }
1633        cgc->cmd[9] = cgc->buflen;
1634        cgc->data_direction = CGC_DATA_WRITE;
1635}
1636
1637static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1638{
1639        int ret;
1640        u_char buf[20];
1641        struct packet_command cgc;
1642        const struct cdrom_device_ops *cdo = cdi->ops;
1643        rpc_state_t rpc_state;
1644
1645        memset(buf, 0, sizeof(buf));
1646        init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1647
1648        switch (ai->type) {
1649        /* LU data send */
1650        case DVD_LU_SEND_AGID:
1651                cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1652                cgc.quiet = 1;
1653                setup_report_key(&cgc, ai->lsa.agid, 0);
1654
1655                if ((ret = cdo->generic_packet(cdi, &cgc)))
1656                        return ret;
1657
1658                ai->lsa.agid = buf[7] >> 6;
1659                /* Returning data, let host change state */
1660                break;
1661
1662        case DVD_LU_SEND_KEY1:
1663                cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1664                setup_report_key(&cgc, ai->lsk.agid, 2);
1665
1666                if ((ret = cdo->generic_packet(cdi, &cgc)))
1667                        return ret;
1668
1669                copy_key(ai->lsk.key, &buf[4]);
1670                /* Returning data, let host change state */
1671                break;
1672
1673        case DVD_LU_SEND_CHALLENGE:
1674                cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1675                setup_report_key(&cgc, ai->lsc.agid, 1);
1676
1677                if ((ret = cdo->generic_packet(cdi, &cgc)))
1678                        return ret;
1679
1680                copy_chal(ai->lsc.chal, &buf[4]);
1681                /* Returning data, let host change state */
1682                break;
1683
1684        /* Post-auth key */
1685        case DVD_LU_SEND_TITLE_KEY:
1686                cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1687                cgc.quiet = 1;
1688                setup_report_key(&cgc, ai->lstk.agid, 4);
1689                cgc.cmd[5] = ai->lstk.lba;
1690                cgc.cmd[4] = ai->lstk.lba >> 8;
1691                cgc.cmd[3] = ai->lstk.lba >> 16;
1692                cgc.cmd[2] = ai->lstk.lba >> 24;
1693
1694                if ((ret = cdo->generic_packet(cdi, &cgc)))
1695                        return ret;
1696
1697                ai->lstk.cpm = (buf[4] >> 7) & 1;
1698                ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1699                ai->lstk.cgms = (buf[4] >> 4) & 3;
1700                copy_key(ai->lstk.title_key, &buf[5]);
1701                /* Returning data, let host change state */
1702                break;
1703
1704        case DVD_LU_SEND_ASF:
1705                cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1706                setup_report_key(&cgc, ai->lsasf.agid, 5);
1707                
1708                if ((ret = cdo->generic_packet(cdi, &cgc)))
1709                        return ret;
1710
1711                ai->lsasf.asf = buf[7] & 1;
1712                break;
1713
1714        /* LU data receive (LU changes state) */
1715        case DVD_HOST_SEND_CHALLENGE:
1716                cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1717                setup_send_key(&cgc, ai->hsc.agid, 1);
1718                buf[1] = 0xe;
1719                copy_chal(&buf[4], ai->hsc.chal);
1720
1721                if ((ret = cdo->generic_packet(cdi, &cgc)))
1722                        return ret;
1723
1724                ai->type = DVD_LU_SEND_KEY1;
1725                break;
1726
1727        case DVD_HOST_SEND_KEY2:
1728                cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1729                setup_send_key(&cgc, ai->hsk.agid, 3);
1730                buf[1] = 0xa;
1731                copy_key(&buf[4], ai->hsk.key);
1732
1733                if ((ret = cdo->generic_packet(cdi, &cgc))) {
1734                        ai->type = DVD_AUTH_FAILURE;
1735                        return ret;
1736                }
1737                ai->type = DVD_AUTH_ESTABLISHED;
1738                break;
1739
1740        /* Misc */
1741        case DVD_INVALIDATE_AGID:
1742                cgc.quiet = 1;
1743                cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1744                setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1745                if ((ret = cdo->generic_packet(cdi, &cgc)))
1746                        return ret;
1747                break;
1748
1749        /* Get region settings */
1750        case DVD_LU_SEND_RPC_STATE:
1751                cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1752                setup_report_key(&cgc, 0, 8);
1753                memset(&rpc_state, 0, sizeof(rpc_state_t));
1754                cgc.buffer = (char *) &rpc_state;
1755
1756                if ((ret = cdo->generic_packet(cdi, &cgc)))
1757                        return ret;
1758
1759                ai->lrpcs.type = rpc_state.type_code;
1760                ai->lrpcs.vra = rpc_state.vra;
1761                ai->lrpcs.ucca = rpc_state.ucca;
1762                ai->lrpcs.region_mask = rpc_state.region_mask;
1763                ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1764                break;
1765
1766        /* Set region settings */
1767        case DVD_HOST_SEND_RPC_STATE:
1768                cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1769                setup_send_key(&cgc, 0, 6);
1770                buf[1] = 6;
1771                buf[4] = ai->hrpcs.pdrc;
1772
1773                if ((ret = cdo->generic_packet(cdi, &cgc)))
1774                        return ret;
1775                break;
1776
1777        default:
1778                cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1779                return -ENOTTY;
1780        }
1781
1782        return 0;
1783}
1784
1785static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1786                                struct packet_command *cgc)
1787{
1788        unsigned char buf[21], *base;
1789        struct dvd_layer *layer;
1790        const struct cdrom_device_ops *cdo = cdi->ops;
1791        int ret, layer_num = s->physical.layer_num;
1792
1793        if (layer_num >= DVD_LAYERS)
1794                return -EINVAL;
1795
1796        init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1797        cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1798        cgc->cmd[6] = layer_num;
1799        cgc->cmd[7] = s->type;
1800        cgc->cmd[9] = cgc->buflen & 0xff;
1801
1802        /*
1803         * refrain from reporting errors on non-existing layers (mainly)
1804         */
1805        cgc->quiet = 1;
1806
1807        ret = cdo->generic_packet(cdi, cgc);
1808        if (ret)
1809                return ret;
1810
1811        base = &buf[4];
1812        layer = &s->physical.layer[layer_num];
1813
1814        /*
1815         * place the data... really ugly, but at least we won't have to
1816         * worry about endianess in userspace.
1817         */
1818        memset(layer, 0, sizeof(*layer));
1819        layer->book_version = base[0] & 0xf;
1820        layer->book_type = base[0] >> 4;
1821        layer->min_rate = base[1] & 0xf;
1822        layer->disc_size = base[1] >> 4;
1823        layer->layer_type = base[2] & 0xf;
1824        layer->track_path = (base[2] >> 4) & 1;
1825        layer->nlayers = (base[2] >> 5) & 3;
1826        layer->track_density = base[3] & 0xf;
1827        layer->linear_density = base[3] >> 4;
1828        layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1829        layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1830        layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1831        layer->bca = base[16] >> 7;
1832
1833        return 0;
1834}
1835
1836static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1837                                struct packet_command *cgc)
1838{
1839        int ret;
1840        u_char buf[8];
1841        const struct cdrom_device_ops *cdo = cdi->ops;
1842
1843        init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1844        cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1845        cgc->cmd[6] = s->copyright.layer_num;
1846        cgc->cmd[7] = s->type;
1847        cgc->cmd[8] = cgc->buflen >> 8;
1848        cgc->cmd[9] = cgc->buflen & 0xff;
1849
1850        ret = cdo->generic_packet(cdi, cgc);
1851        if (ret)
1852                return ret;
1853
1854        s->copyright.cpst = buf[4];
1855        s->copyright.rmi = buf[5];
1856
1857        return 0;
1858}
1859
1860static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1861                                struct packet_command *cgc)
1862{
1863        int ret, size;
1864        u_char *buf;
1865        const struct cdrom_device_ops *cdo = cdi->ops;
1866
1867        size = sizeof(s->disckey.value) + 4;
1868
1869        buf = kmalloc(size, GFP_KERNEL);
1870        if (!buf)
1871                return -ENOMEM;
1872
1873        init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1874        cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1875        cgc->cmd[7] = s->type;
1876        cgc->cmd[8] = size >> 8;
1877        cgc->cmd[9] = size & 0xff;
1878        cgc->cmd[10] = s->disckey.agid << 6;
1879
1880        ret = cdo->generic_packet(cdi, cgc);
1881        if (!ret)
1882                memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1883
1884        kfree(buf);
1885        return ret;
1886}
1887
1888static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1889                        struct packet_command *cgc)
1890{
1891        int ret, size = 4 + 188;
1892        u_char *buf;
1893        const struct cdrom_device_ops *cdo = cdi->ops;
1894
1895        buf = kmalloc(size, GFP_KERNEL);
1896        if (!buf)
1897                return -ENOMEM;
1898
1899        init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1900        cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1901        cgc->cmd[7] = s->type;
1902        cgc->cmd[9] = cgc->buflen & 0xff;
1903
1904        ret = cdo->generic_packet(cdi, cgc);
1905        if (ret)
1906                goto out;
1907
1908        s->bca.len = buf[0] << 8 | buf[1];
1909        if (s->bca.len < 12 || s->bca.len > 188) {
1910                cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1911                       s->bca.len);
1912                ret = -EIO;
1913                goto out;
1914        }
1915        memcpy(s->bca.value, &buf[4], s->bca.len);
1916        ret = 0;
1917out:
1918        kfree(buf);
1919        return ret;
1920}
1921
1922static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1923                                struct packet_command *cgc)
1924{
1925        int ret = 0, size;
1926        u_char *buf;
1927        const struct cdrom_device_ops *cdo = cdi->ops;
1928
1929        size = sizeof(s->manufact.value) + 4;
1930
1931        buf = kmalloc(size, GFP_KERNEL);
1932        if (!buf)
1933                return -ENOMEM;
1934
1935        init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1936        cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1937        cgc->cmd[7] = s->type;
1938        cgc->cmd[8] = size >> 8;
1939        cgc->cmd[9] = size & 0xff;
1940
1941        ret = cdo->generic_packet(cdi, cgc);
1942        if (ret)
1943                goto out;
1944
1945        s->manufact.len = buf[0] << 8 | buf[1];
1946        if (s->manufact.len < 0) {
1947                cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1948                       s->manufact.len);
1949                ret = -EIO;
1950        } else {
1951                if (s->manufact.len > 2048) {
1952                        cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1953                               s->manufact.len);
1954                        s->manufact.len = 2048;
1955                }
1956                memcpy(s->manufact.value, &buf[4], s->manufact.len);
1957        }
1958
1959out:
1960        kfree(buf);
1961        return ret;
1962}
1963
1964static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1965                                struct packet_command *cgc)
1966{
1967        switch (s->type) {
1968        case DVD_STRUCT_PHYSICAL:
1969                return dvd_read_physical(cdi, s, cgc);
1970
1971        case DVD_STRUCT_COPYRIGHT:
1972                return dvd_read_copyright(cdi, s, cgc);
1973
1974        case DVD_STRUCT_DISCKEY:
1975                return dvd_read_disckey(cdi, s, cgc);
1976
1977        case DVD_STRUCT_BCA:
1978                return dvd_read_bca(cdi, s, cgc);
1979
1980        case DVD_STRUCT_MANUFACT:
1981                return dvd_read_manufact(cdi, s, cgc);
1982                
1983        default:
1984                cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1985                       s->type);
1986                return -EINVAL;
1987        }
1988}
1989
1990int cdrom_mode_sense(struct cdrom_device_info *cdi,
1991                     struct packet_command *cgc,
1992                     int page_code, int page_control)
1993{
1994        const struct cdrom_device_ops *cdo = cdi->ops;
1995
1996        memset(cgc->cmd, 0, sizeof(cgc->cmd));
1997
1998        cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1999        cgc->cmd[2] = page_code | (page_control << 6);
2000        cgc->cmd[7] = cgc->buflen >> 8;
2001        cgc->cmd[8] = cgc->buflen & 0xff;
2002        cgc->data_direction = CGC_DATA_READ;
2003        return cdo->generic_packet(cdi, cgc);
2004}
2005
2006int cdrom_mode_select(struct cdrom_device_info *cdi,
2007                      struct packet_command *cgc)
2008{
2009        const struct cdrom_device_ops *cdo = cdi->ops;
2010
2011        memset(cgc->cmd, 0, sizeof(cgc->cmd));
2012        memset(cgc->buffer, 0, 2);
2013        cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2014        cgc->cmd[1] = 0x10;             /* PF */
2015        cgc->cmd[7] = cgc->buflen >> 8;
2016        cgc->cmd[8] = cgc->buflen & 0xff;
2017        cgc->data_direction = CGC_DATA_WRITE;
2018        return cdo->generic_packet(cdi, cgc);
2019}
2020
2021static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2022                                 struct cdrom_subchnl *subchnl, int mcn)
2023{
2024        const struct cdrom_device_ops *cdo = cdi->ops;
2025        struct packet_command cgc;
2026        char buffer[32];
2027        int ret;
2028
2029        init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2030        cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2031        cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2032        cgc.cmd[2] = 0x40;  /* request subQ data */
2033        cgc.cmd[3] = mcn ? 2 : 1;
2034        cgc.cmd[8] = 16;
2035
2036        if ((ret = cdo->generic_packet(cdi, &cgc)))
2037                return ret;
2038
2039        subchnl->cdsc_audiostatus = cgc.buffer[1];
2040        subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2041        subchnl->cdsc_trk = cgc.buffer[6];
2042        subchnl->cdsc_ind = cgc.buffer[7];
2043
2044        if (subchnl->cdsc_format == CDROM_LBA) {
2045                subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2046                                                (cgc.buffer[9] << 16) |
2047                                                (cgc.buffer[10] << 8) |
2048                                                (cgc.buffer[11]));
2049                subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2050                                                (cgc.buffer[13] << 16) |
2051                                                (cgc.buffer[14] << 8) |
2052                                                (cgc.buffer[15]));
2053        } else {
2054                subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2055                subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2056                subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2057                subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2058                subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2059                subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2060        }
2061
2062        return 0;
2063}
2064
2065/*
2066 * Specific READ_10 interface
2067 */
2068static int cdrom_read_cd(struct cdrom_device_info *cdi,
2069                         struct packet_command *cgc, int lba,
2070                         int blocksize, int nblocks)
2071{
2072        const struct cdrom_device_ops *cdo = cdi->ops;
2073
2074        memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2075        cgc->cmd[0] = GPCMD_READ_10;
2076        cgc->cmd[2] = (lba >> 24) & 0xff;
2077        cgc->cmd[3] = (lba >> 16) & 0xff;
2078        cgc->cmd[4] = (lba >>  8) & 0xff;
2079        cgc->cmd[5] = lba & 0xff;
2080        cgc->cmd[6] = (nblocks >> 16) & 0xff;
2081        cgc->cmd[7] = (nblocks >>  8) & 0xff;
2082        cgc->cmd[8] = nblocks & 0xff;
2083        cgc->buflen = blocksize * nblocks;
2084        return cdo->generic_packet(cdi, cgc);
2085}
2086
2087/* very generic interface for reading the various types of blocks */
2088static int cdrom_read_block(struct cdrom_device_info *cdi,
2089                            struct packet_command *cgc,
2090                            int lba, int nblocks, int format, int blksize)
2091{
2092        const struct cdrom_device_ops *cdo = cdi->ops;
2093
2094        memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2095        cgc->cmd[0] = GPCMD_READ_CD;
2096        /* expected sector size - cdda,mode1,etc. */
2097        cgc->cmd[1] = format << 2;
2098        /* starting address */
2099        cgc->cmd[2] = (lba >> 24) & 0xff;
2100        cgc->cmd[3] = (lba >> 16) & 0xff;
2101        cgc->cmd[4] = (lba >>  8) & 0xff;
2102        cgc->cmd[5] = lba & 0xff;
2103        /* number of blocks */
2104        cgc->cmd[6] = (nblocks >> 16) & 0xff;
2105        cgc->cmd[7] = (nblocks >>  8) & 0xff;
2106        cgc->cmd[8] = nblocks & 0xff;
2107        cgc->buflen = blksize * nblocks;
2108        
2109        /* set the header info returned */
2110        switch (blksize) {
2111        case CD_FRAMESIZE_RAW0  : cgc->cmd[9] = 0x58; break;
2112        case CD_FRAMESIZE_RAW1  : cgc->cmd[9] = 0x78; break;
2113        case CD_FRAMESIZE_RAW   : cgc->cmd[9] = 0xf8; break;
2114        default                 : cgc->cmd[9] = 0x10;
2115        }
2116        
2117        return cdo->generic_packet(cdi, cgc);
2118}
2119
2120static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2121                               int lba, int nframes)
2122{
2123        struct packet_command cgc;
2124        int ret = 0;
2125        int nr;
2126
2127        cdi->last_sense = 0;
2128
2129        memset(&cgc, 0, sizeof(cgc));
2130
2131        /*
2132         * start with will ra.nframes size, back down if alloc fails
2133         */
2134        nr = nframes;
2135        do {
2136                cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL);
2137                if (cgc.buffer)
2138                        break;
2139
2140                nr >>= 1;
2141        } while (nr);
2142
2143        if (!nr)
2144                return -ENOMEM;
2145
2146        cgc.data_direction = CGC_DATA_READ;
2147        while (nframes > 0) {
2148                if (nr > nframes)
2149                        nr = nframes;
2150
2151                ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2152                if (ret)
2153                        break;
2154                if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2155                        ret = -EFAULT;
2156                        break;
2157                }
2158                ubuf += CD_FRAMESIZE_RAW * nr;
2159                nframes -= nr;
2160                lba += nr;
2161        }
2162        kfree(cgc.buffer);
2163        return ret;
2164}
2165
2166static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2167                               int lba, int nframes)
2168{
2169        struct request_queue *q = cdi->disk->queue;
2170        struct request *rq;
2171        struct scsi_request *req;
2172        struct bio *bio;
2173        unsigned int len;
2174        int nr, ret = 0;
2175
2176        if (!q)
2177                return -ENXIO;
2178
2179        if (!blk_queue_scsi_passthrough(q)) {
2180                WARN_ONCE(true,
2181                          "Attempt read CDDA info through a non-SCSI queue\n");
2182                return -EINVAL;
2183        }
2184
2185        cdi->last_sense = 0;
2186
2187        while (nframes) {
2188                nr = nframes;
2189                if (cdi->cdda_method == CDDA_BPC_SINGLE)
2190                        nr = 1;
2191                if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2192                        nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2193
2194                len = nr * CD_FRAMESIZE_RAW;
2195
2196                rq = blk_get_request(q, REQ_OP_SCSI_IN, 0);
2197                if (IS_ERR(rq)) {
2198                        ret = PTR_ERR(rq);
2199                        break;
2200                }
2201                req = scsi_req(rq);
2202
2203                ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2204                if (ret) {
2205                        blk_put_request(rq);
2206                        break;
2207                }
2208
2209                req->cmd[0] = GPCMD_READ_CD;
2210                req->cmd[1] = 1 << 2;
2211                req->cmd[2] = (lba >> 24) & 0xff;
2212                req->cmd[3] = (lba >> 16) & 0xff;
2213                req->cmd[4] = (lba >>  8) & 0xff;
2214                req->cmd[5] = lba & 0xff;
2215                req->cmd[6] = (nr >> 16) & 0xff;
2216                req->cmd[7] = (nr >>  8) & 0xff;
2217                req->cmd[8] = nr & 0xff;
2218                req->cmd[9] = 0xf8;
2219
2220                req->cmd_len = 12;
2221                rq->timeout = 60 * HZ;
2222                bio = rq->bio;
2223
2224                blk_execute_rq(q, cdi->disk, rq, 0);
2225                if (scsi_req(rq)->result) {
2226                        struct scsi_sense_hdr sshdr;
2227
2228                        ret = -EIO;
2229                        scsi_normalize_sense(req->sense, req->sense_len,
2230                                             &sshdr);
2231                        cdi->last_sense = sshdr.sense_key;
2232                }
2233
2234                if (blk_rq_unmap_user(bio))
2235                        ret = -EFAULT;
2236                blk_put_request(rq);
2237
2238                if (ret)
2239                        break;
2240
2241                nframes -= nr;
2242                lba += nr;
2243                ubuf += len;
2244        }
2245
2246        return ret;
2247}
2248
2249static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2250                           int lba, int nframes)
2251{
2252        int ret;
2253
2254        if (cdi->cdda_method == CDDA_OLD)
2255                return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2256
2257retry:
2258        /*
2259         * for anything else than success and io error, we need to retry
2260         */
2261        ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2262        if (!ret || ret != -EIO)
2263                return ret;
2264
2265        /*
2266         * I've seen drives get sense 4/8/3 udma crc errors on multi
2267         * frame dma, so drop to single frame dma if we need to
2268         */
2269        if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2270                pr_info("dropping to single frame dma\n");
2271                cdi->cdda_method = CDDA_BPC_SINGLE;
2272                goto retry;
2273        }
2274
2275        /*
2276         * so we have an io error of some sort with multi frame dma. if the
2277         * condition wasn't a hardware error
2278         * problems, not for any error
2279         */
2280        if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2281                return ret;
2282
2283        pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2284        cdi->cdda_method = CDDA_OLD;
2285        return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);    
2286}
2287
2288static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2289                void __user *argp)
2290{
2291        struct cdrom_multisession ms_info;
2292        u8 requested_format;
2293        int ret;
2294
2295        cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2296
2297        if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2298                return -ENOSYS;
2299
2300        if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2301                return -EFAULT;
2302
2303        requested_format = ms_info.addr_format;
2304        if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2305                return -EINVAL;
2306        ms_info.addr_format = CDROM_LBA;
2307
2308        ret = cdi->ops->get_last_session(cdi, &ms_info);
2309        if (ret)
2310                return ret;
2311
2312        sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2313
2314        if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2315                return -EFAULT;
2316
2317        cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2318        return 0;
2319}
2320
2321static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2322{
2323        cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2324
2325        if (!CDROM_CAN(CDC_OPEN_TRAY))
2326                return -ENOSYS;
2327        if (cdi->use_count != 1 || cdi->keeplocked)
2328                return -EBUSY;
2329        if (CDROM_CAN(CDC_LOCK)) {
2330                int ret = cdi->ops->lock_door(cdi, 0);
2331                if (ret)
2332                        return ret;
2333        }
2334
2335        return cdi->ops->tray_move(cdi, 1);
2336}
2337
2338static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2339{
2340        cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2341
2342        if (!CDROM_CAN(CDC_CLOSE_TRAY))
2343                return -ENOSYS;
2344        return cdi->ops->tray_move(cdi, 0);
2345}
2346
2347static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2348                unsigned long arg)
2349{
2350        cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2351
2352        if (!CDROM_CAN(CDC_OPEN_TRAY))
2353                return -ENOSYS;
2354        if (cdi->keeplocked)
2355                return -EBUSY;
2356
2357        cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2358        if (arg)
2359                cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2360        return 0;
2361}
2362
2363static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2364                unsigned long arg)
2365{
2366        struct cdrom_changer_info *info;
2367        int ret;
2368
2369        cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2370
2371        if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2372                return -ENOSYS;
2373
2374        /* cannot select disc or select current disc */
2375        if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2376                return media_changed(cdi, 1);
2377
2378        if (arg >= cdi->capacity)
2379                return -EINVAL;
2380
2381        info = kmalloc(sizeof(*info), GFP_KERNEL);
2382        if (!info)
2383                return -ENOMEM;
2384
2385        ret = cdrom_read_mech_status(cdi, info);
2386        if (!ret)
2387                ret = info->slots[arg].change;
2388        kfree(info);
2389        return ret;
2390}
2391
2392static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2393                unsigned long arg)
2394{
2395        cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2396
2397        /*
2398         * Options need to be in sync with capability.
2399         * Too late for that, so we have to check each one separately.
2400         */
2401        switch (arg) {
2402        case CDO_USE_FFLAGS:
2403        case CDO_CHECK_TYPE:
2404                break;
2405        case CDO_LOCK:
2406                if (!CDROM_CAN(CDC_LOCK))
2407                        return -ENOSYS;
2408                break;
2409        case 0:
2410                return cdi->options;
2411        /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2412        default:
2413                if (!CDROM_CAN(arg))
2414                        return -ENOSYS;
2415        }
2416        cdi->options |= (int) arg;
2417        return cdi->options;
2418}
2419
2420static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2421                unsigned long arg)
2422{
2423        cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2424
2425        cdi->options &= ~(int) arg;
2426        return cdi->options;
2427}
2428
2429static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2430                unsigned long arg)
2431{
2432        cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2433
2434        if (!CDROM_CAN(CDC_SELECT_SPEED))
2435                return -ENOSYS;
2436        return cdi->ops->select_speed(cdi, arg);
2437}
2438
2439static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2440                unsigned long arg)
2441{
2442        cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2443
2444        if (!CDROM_CAN(CDC_SELECT_DISC))
2445                return -ENOSYS;
2446
2447        if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2448                if ((int)arg >= cdi->capacity)
2449                        return -EINVAL;
2450        }
2451
2452        /*
2453         * ->select_disc is a hook to allow a driver-specific way of
2454         * seleting disc.  However, since there is no equivalent hook for
2455         * cdrom_slot_status this may not actually be useful...
2456         */
2457        if (cdi->ops->select_disc)
2458                return cdi->ops->select_disc(cdi, arg);
2459
2460        cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2461        return cdrom_select_disc(cdi, arg);
2462}
2463
2464static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2465                struct block_device *bdev)
2466{
2467        cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2468
2469        if (!capable(CAP_SYS_ADMIN))
2470                return -EACCES;
2471        if (!CDROM_CAN(CDC_RESET))
2472                return -ENOSYS;
2473        invalidate_bdev(bdev);
2474        return cdi->ops->reset(cdi);
2475}
2476
2477static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2478                unsigned long arg)
2479{
2480        cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2481
2482        if (!CDROM_CAN(CDC_LOCK))
2483                return -EDRIVE_CANT_DO_THIS;
2484
2485        cdi->keeplocked = arg ? 1 : 0;
2486
2487        /*
2488         * Don't unlock the door on multiple opens by default, but allow
2489         * root to do so.
2490         */
2491        if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2492                return -EBUSY;
2493        return cdi->ops->lock_door(cdi, arg);
2494}
2495
2496static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2497                unsigned long arg)
2498{
2499        cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2500
2501        if (!capable(CAP_SYS_ADMIN))
2502                return -EACCES;
2503        debug = arg ? 1 : 0;
2504        return debug;
2505}
2506
2507static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2508{
2509        cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2510        return (cdi->ops->capability & ~cdi->mask);
2511}
2512
2513/*
2514 * The following function is implemented, although very few audio
2515 * discs give Universal Product Code information, which should just be
2516 * the Medium Catalog Number on the box.  Note, that the way the code
2517 * is written on the CD is /not/ uniform across all discs!
2518 */
2519static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2520                void __user *argp)
2521{
2522        struct cdrom_mcn mcn;
2523        int ret;
2524
2525        cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2526
2527        if (!(cdi->ops->capability & CDC_MCN))
2528                return -ENOSYS;
2529        ret = cdi->ops->get_mcn(cdi, &mcn);
2530        if (ret)
2531                return ret;
2532
2533        if (copy_to_user(argp, &mcn, sizeof(mcn)))
2534                return -EFAULT;
2535        cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2536        return 0;
2537}
2538
2539static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2540                unsigned long arg)
2541{
2542        cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2543
2544        if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2545                return -ENOSYS;
2546        if (!CDROM_CAN(CDC_SELECT_DISC) ||
2547            (arg == CDSL_CURRENT || arg == CDSL_NONE))
2548                return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2549        if (arg >= cdi->capacity)
2550                return -EINVAL;
2551        return cdrom_slot_status(cdi, arg);
2552}
2553
2554/*
2555 * Ok, this is where problems start.  The current interface for the
2556 * CDROM_DISC_STATUS ioctl is flawed.  It makes the false assumption that
2557 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc.  Unfortunately, while this
2558 * is often the case, it is also very common for CDs to have some tracks
2559 * with data, and some tracks with audio.  Just because I feel like it,
2560 * I declare the following to be the best way to cope.  If the CD has ANY
2561 * data tracks on it, it will be returned as a data CD.  If it has any XA
2562 * tracks, I will return it as that.  Now I could simplify this interface
2563 * by combining these  returns with the above, but this more clearly
2564 * demonstrates the problem with the current interface.  Too bad this
2565 * wasn't designed to use bitmasks...         -Erik
2566 *
2567 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2568 * User level programmers might feel the ioctl is not very useful.
2569 *                                      ---david
2570 */
2571static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2572{
2573        tracktype tracks;
2574
2575        cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2576
2577        cdrom_count_tracks(cdi, &tracks);
2578        if (tracks.error)
2579                return tracks.error;
2580
2581        /* Policy mode on */
2582        if (tracks.audio > 0) {
2583                if (!tracks.data && !tracks.cdi && !tracks.xa)
2584                        return CDS_AUDIO;
2585                else
2586                        return CDS_MIXED;
2587        }
2588
2589        if (tracks.cdi > 0)
2590                return CDS_XA_2_2;
2591        if (tracks.xa > 0)
2592                return CDS_XA_2_1;
2593        if (tracks.data > 0)
2594                return CDS_DATA_1;
2595        /* Policy mode off */
2596
2597        cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2598        return CDS_NO_INFO;
2599}
2600
2601static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2602{
2603        cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2604        return cdi->capacity;
2605}
2606
2607static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2608                void __user *argp)
2609{
2610        struct cdrom_subchnl q;
2611        u8 requested, back;
2612        int ret;
2613
2614        /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2615
2616        if (copy_from_user(&q, argp, sizeof(q)))
2617                return -EFAULT;
2618
2619        requested = q.cdsc_format;
2620        if (requested != CDROM_MSF && requested != CDROM_LBA)
2621                return -EINVAL;
2622        q.cdsc_format = CDROM_MSF;
2623
2624        ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2625        if (ret)
2626                return ret;
2627
2628        back = q.cdsc_format; /* local copy */
2629        sanitize_format(&q.cdsc_absaddr, &back, requested);
2630        sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2631
2632        if (copy_to_user(argp, &q, sizeof(q)))
2633                return -EFAULT;
2634        /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2635        return 0;
2636}
2637
2638static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2639                void __user *argp)
2640{
2641        struct cdrom_tochdr header;
2642        int ret;
2643
2644        /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2645
2646        if (copy_from_user(&header, argp, sizeof(header)))
2647                return -EFAULT;
2648
2649        ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2650        if (ret)
2651                return ret;
2652
2653        if (copy_to_user(argp, &header, sizeof(header)))
2654                return -EFAULT;
2655        /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2656        return 0;
2657}
2658
2659static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2660                void __user *argp)
2661{
2662        struct cdrom_tocentry entry;
2663        u8 requested_format;
2664        int ret;
2665
2666        /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2667
2668        if (copy_from_user(&entry, argp, sizeof(entry)))
2669                return -EFAULT;
2670
2671        requested_format = entry.cdte_format;
2672        if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2673                return -EINVAL;
2674        /* make interface to low-level uniform */
2675        entry.cdte_format = CDROM_MSF;
2676        ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2677        if (ret)
2678                return ret;
2679        sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2680
2681        if (copy_to_user(argp, &entry, sizeof(entry)))
2682                return -EFAULT;
2683        /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2684        return 0;
2685}
2686
2687static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2688                void __user *argp)
2689{
2690        struct cdrom_msf msf;
2691
2692        cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2693
2694        if (!CDROM_CAN(CDC_PLAY_AUDIO))
2695                return -ENOSYS;
2696        if (copy_from_user(&msf, argp, sizeof(msf)))
2697                return -EFAULT;
2698        return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2699}
2700
2701static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2702                void __user *argp)
2703{
2704        struct cdrom_ti ti;
2705        int ret;
2706
2707        cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2708
2709        if (!CDROM_CAN(CDC_PLAY_AUDIO))
2710                return -ENOSYS;
2711        if (copy_from_user(&ti, argp, sizeof(ti)))
2712                return -EFAULT;
2713
2714        ret = check_for_audio_disc(cdi, cdi->ops);
2715        if (ret)
2716                return ret;
2717        return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2718}
2719static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2720                void __user *argp)
2721{
2722        struct cdrom_volctrl volume;
2723
2724        cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2725
2726        if (!CDROM_CAN(CDC_PLAY_AUDIO))
2727                return -ENOSYS;
2728        if (copy_from_user(&volume, argp, sizeof(volume)))
2729                return -EFAULT;
2730        return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2731}
2732
2733static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2734                void __user *argp)
2735{
2736        struct cdrom_volctrl volume;
2737        int ret;
2738
2739        cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2740
2741        if (!CDROM_CAN(CDC_PLAY_AUDIO))
2742                return -ENOSYS;
2743
2744        ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2745        if (ret)
2746                return ret;
2747
2748        if (copy_to_user(argp, &volume, sizeof(volume)))
2749                return -EFAULT;
2750        return 0;
2751}
2752
2753static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2754                unsigned int cmd)
2755{
2756        int ret;
2757
2758        cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2759
2760        if (!CDROM_CAN(CDC_PLAY_AUDIO))
2761                return -ENOSYS;
2762        ret = check_for_audio_disc(cdi, cdi->ops);
2763        if (ret)
2764                return ret;
2765        return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2766}
2767
2768/*
2769 * Required when we need to use READ_10 to issue other than 2048 block
2770 * reads
2771 */
2772static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2773{
2774        const struct cdrom_device_ops *cdo = cdi->ops;
2775        struct packet_command cgc;
2776        struct modesel_head mh;
2777
2778        memset(&mh, 0, sizeof(mh));
2779        mh.block_desc_length = 0x08;
2780        mh.block_length_med = (size >> 8) & 0xff;
2781        mh.block_length_lo = size & 0xff;
2782
2783        memset(&cgc, 0, sizeof(cgc));
2784        cgc.cmd[0] = 0x15;
2785        cgc.cmd[1] = 1 << 4;
2786        cgc.cmd[4] = 12;
2787        cgc.buflen = sizeof(mh);
2788        cgc.buffer = (char *) &mh;
2789        cgc.data_direction = CGC_DATA_WRITE;
2790        mh.block_desc_length = 0x08;
2791        mh.block_length_med = (size >> 8) & 0xff;
2792        mh.block_length_lo = size & 0xff;
2793
2794        return cdo->generic_packet(cdi, &cgc);
2795}
2796
2797static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2798                                __u16 track, __u8 type, track_information *ti)
2799{
2800        const struct cdrom_device_ops *cdo = cdi->ops;
2801        struct packet_command cgc;
2802        int ret, buflen;
2803
2804        init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2805        cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2806        cgc.cmd[1] = type & 3;
2807        cgc.cmd[4] = (track & 0xff00) >> 8;
2808        cgc.cmd[5] = track & 0xff;
2809        cgc.cmd[8] = 8;
2810        cgc.quiet = 1;
2811
2812        ret = cdo->generic_packet(cdi, &cgc);
2813        if (ret)
2814                return ret;
2815
2816        buflen = be16_to_cpu(ti->track_information_length) +
2817                sizeof(ti->track_information_length);
2818
2819        if (buflen > sizeof(track_information))
2820                buflen = sizeof(track_information);
2821
2822        cgc.cmd[8] = cgc.buflen = buflen;
2823        ret = cdo->generic_packet(cdi, &cgc);
2824        if (ret)
2825                return ret;
2826
2827        /* return actual fill size */
2828        return buflen;
2829}
2830
2831/* return the last written block on the CD-R media. this is for the udf
2832   file system. */
2833int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2834{
2835        struct cdrom_tocentry toc;
2836        disc_information di;
2837        track_information ti;
2838        __u32 last_track;
2839        int ret = -1, ti_size;
2840
2841        if (!CDROM_CAN(CDC_GENERIC_PACKET))
2842                goto use_toc;
2843
2844        ret = cdrom_get_disc_info(cdi, &di);
2845        if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2846                        + sizeof(di.last_track_lsb)))
2847                goto use_toc;
2848
2849        /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2850        last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2851        ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2852        if (ti_size < (int)offsetof(typeof(ti), track_start))
2853                goto use_toc;
2854
2855        /* if this track is blank, try the previous. */
2856        if (ti.blank) {
2857                if (last_track == 1)
2858                        goto use_toc;
2859                last_track--;
2860                ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2861        }
2862
2863        if (ti_size < (int)(offsetof(typeof(ti), track_size)
2864                                + sizeof(ti.track_size)))
2865                goto use_toc;
2866
2867        /* if last recorded field is valid, return it. */
2868        if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2869                                + sizeof(ti.last_rec_address))) {
2870                *last_written = be32_to_cpu(ti.last_rec_address);
2871        } else {
2872                /* make it up instead */
2873                *last_written = be32_to_cpu(ti.track_start) +
2874                                be32_to_cpu(ti.track_size);
2875                if (ti.free_blocks)
2876                        *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2877        }
2878        return 0;
2879
2880        /* this is where we end up if the drive either can't do a
2881           GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2882           it doesn't give enough information or fails. then we return
2883           the toc contents. */
2884use_toc:
2885        toc.cdte_format = CDROM_MSF;
2886        toc.cdte_track = CDROM_LEADOUT;
2887        if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2888                return ret;
2889        sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2890        *last_written = toc.cdte_addr.lba;
2891        return 0;
2892}
2893
2894/* return the next writable block. also for udf file system. */
2895static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2896                                   long *next_writable)
2897{
2898        disc_information di;
2899        track_information ti;
2900        __u16 last_track;
2901        int ret, ti_size;
2902
2903        if (!CDROM_CAN(CDC_GENERIC_PACKET))
2904                goto use_last_written;
2905
2906        ret = cdrom_get_disc_info(cdi, &di);
2907        if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2908                                + sizeof(di.last_track_lsb))
2909                goto use_last_written;
2910
2911        /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2912        last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2913        ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2914        if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2915                goto use_last_written;
2916
2917        /* if this track is blank, try the previous. */
2918        if (ti.blank) {
2919                if (last_track == 1)
2920                        goto use_last_written;
2921                last_track--;
2922                ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2923                if (ti_size < 0)
2924                        goto use_last_written;
2925        }
2926
2927        /* if next recordable address field is valid, use it. */
2928        if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2929                                + sizeof(ti.next_writable)) {
2930                *next_writable = be32_to_cpu(ti.next_writable);
2931                return 0;
2932        }
2933
2934use_last_written:
2935        ret = cdrom_get_last_written(cdi, next_writable);
2936        if (ret) {
2937                *next_writable = 0;
2938                return ret;
2939        } else {
2940                *next_writable += 7;
2941                return 0;
2942        }
2943}
2944
2945static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2946                                              void __user *arg,
2947                                              struct packet_command *cgc,
2948                                              int cmd)
2949{
2950        struct scsi_sense_hdr sshdr;
2951        struct cdrom_msf msf;
2952        int blocksize = 0, format = 0, lba;
2953        int ret;
2954
2955        switch (cmd) {
2956        case CDROMREADRAW:
2957                blocksize = CD_FRAMESIZE_RAW;
2958                break;
2959        case CDROMREADMODE1:
2960                blocksize = CD_FRAMESIZE;
2961                format = 2;
2962                break;
2963        case CDROMREADMODE2:
2964                blocksize = CD_FRAMESIZE_RAW0;
2965                break;
2966        }
2967        if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2968                return -EFAULT;
2969        lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2970        /* FIXME: we need upper bound checking, too!! */
2971        if (lba < 0)
2972                return -EINVAL;
2973
2974        cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2975        if (cgc->buffer == NULL)
2976                return -ENOMEM;
2977
2978        memset(&sshdr, 0, sizeof(sshdr));
2979        cgc->sshdr = &sshdr;
2980        cgc->data_direction = CGC_DATA_READ;
2981        ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2982        if (ret && sshdr.sense_key == 0x05 &&
2983            sshdr.asc == 0x20 &&
2984            sshdr.ascq == 0x00) {
2985                /*
2986                 * SCSI-II devices are not required to support
2987                 * READ_CD, so let's try switching block size
2988                 */
2989                /* FIXME: switch back again... */
2990                ret = cdrom_switch_blocksize(cdi, blocksize);
2991                if (ret)
2992                        goto out;
2993                cgc->sshdr = NULL;
2994                ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2995                ret |= cdrom_switch_blocksize(cdi, blocksize);
2996        }
2997        if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2998                ret = -EFAULT;
2999out:
3000        kfree(cgc->buffer);
3001        return ret;
3002}
3003
3004static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3005                                               void __user *arg)
3006{
3007        struct cdrom_read_audio ra;
3008        int lba;
3009
3010        if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3011                           sizeof(ra)))
3012                return -EFAULT;
3013
3014        if (ra.addr_format == CDROM_MSF)
3015                lba = msf_to_lba(ra.addr.msf.minute,
3016                                 ra.addr.msf.second,
3017                                 ra.addr.msf.frame);
3018        else if (ra.addr_format == CDROM_LBA)
3019                lba = ra.addr.lba;
3020        else
3021                return -EINVAL;
3022
3023        /* FIXME: we need upper bound checking, too!! */
3024        if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3025                return -EINVAL;
3026
3027        return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3028}
3029
3030static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3031                                               void __user *arg)
3032{
3033        int ret;
3034        struct cdrom_subchnl q;
3035        u_char requested, back;
3036        if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3037                return -EFAULT;
3038        requested = q.cdsc_format;
3039        if (!((requested == CDROM_MSF) ||
3040              (requested == CDROM_LBA)))
3041                return -EINVAL;
3042
3043        ret = cdrom_read_subchannel(cdi, &q, 0);
3044        if (ret)
3045                return ret;
3046        back = q.cdsc_format; /* local copy */
3047        sanitize_format(&q.cdsc_absaddr, &back, requested);
3048        sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3049        if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3050                return -EFAULT;
3051        /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3052        return 0;
3053}
3054
3055static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3056                                             void __user *arg,
3057                                             struct packet_command *cgc)
3058{
3059        const struct cdrom_device_ops *cdo = cdi->ops;
3060        struct cdrom_msf msf;
3061        cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3062        if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3063                return -EFAULT;
3064        cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3065        cgc->cmd[3] = msf.cdmsf_min0;
3066        cgc->cmd[4] = msf.cdmsf_sec0;
3067        cgc->cmd[5] = msf.cdmsf_frame0;
3068        cgc->cmd[6] = msf.cdmsf_min1;
3069        cgc->cmd[7] = msf.cdmsf_sec1;
3070        cgc->cmd[8] = msf.cdmsf_frame1;
3071        cgc->data_direction = CGC_DATA_NONE;
3072        return cdo->generic_packet(cdi, cgc);
3073}
3074
3075static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3076                                             void __user *arg,
3077                                             struct packet_command *cgc)
3078{
3079        const struct cdrom_device_ops *cdo = cdi->ops;
3080        struct cdrom_blk blk;
3081        cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3082        if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3083                return -EFAULT;
3084        cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3085        cgc->cmd[2] = (blk.from >> 24) & 0xff;
3086        cgc->cmd[3] = (blk.from >> 16) & 0xff;
3087        cgc->cmd[4] = (blk.from >>  8) & 0xff;
3088        cgc->cmd[5] = blk.from & 0xff;
3089        cgc->cmd[7] = (blk.len >> 8) & 0xff;
3090        cgc->cmd[8] = blk.len & 0xff;
3091        cgc->data_direction = CGC_DATA_NONE;
3092        return cdo->generic_packet(cdi, cgc);
3093}
3094
3095static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3096                                           void __user *arg,
3097                                           struct packet_command *cgc,
3098                                           unsigned int cmd)
3099{
3100        struct cdrom_volctrl volctrl;
3101        unsigned char buffer[32];
3102        char mask[sizeof(buffer)];
3103        unsigned short offset;
3104        int ret;
3105
3106        cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3107
3108        if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3109                           sizeof(volctrl)))
3110                return -EFAULT;
3111
3112        cgc->buffer = buffer;
3113        cgc->buflen = 24;
3114        ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3115        if (ret)
3116                return ret;
3117                
3118        /* originally the code depended on buffer[1] to determine
3119           how much data is available for transfer. buffer[1] is
3120           unfortunately ambigious and the only reliable way seem
3121           to be to simply skip over the block descriptor... */
3122        offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3123
3124        if (offset + 16 > sizeof(buffer))
3125                return -E2BIG;
3126
3127        if (offset + 16 > cgc->buflen) {
3128                cgc->buflen = offset + 16;
3129                ret = cdrom_mode_sense(cdi, cgc,
3130                                       GPMODE_AUDIO_CTL_PAGE, 0);
3131                if (ret)
3132                        return ret;
3133        }
3134
3135        /* sanity check */
3136        if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3137            buffer[offset + 1] < 14)
3138                return -EINVAL;
3139
3140        /* now we have the current volume settings. if it was only
3141           a CDROMVOLREAD, return these values */
3142        if (cmd == CDROMVOLREAD) {
3143                volctrl.channel0 = buffer[offset+9];
3144                volctrl.channel1 = buffer[offset+11];
3145                volctrl.channel2 = buffer[offset+13];
3146                volctrl.channel3 = buffer[offset+15];
3147                if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3148                                 sizeof(volctrl)))
3149                        return -EFAULT;
3150                return 0;
3151        }
3152                
3153        /* get the volume mask */
3154        cgc->buffer = mask;
3155        ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3156        if (ret)
3157                return ret;
3158
3159        buffer[offset + 9]  = volctrl.channel0 & mask[offset + 9];
3160        buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3161        buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3162        buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3163
3164        /* set volume */
3165        cgc->buffer = buffer + offset - 8;
3166        memset(cgc->buffer, 0, 8);
3167        return cdrom_mode_select(cdi, cgc);
3168}
3169
3170static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3171                                               struct packet_command *cgc,
3172                                               int cmd)
3173{
3174        const struct cdrom_device_ops *cdo = cdi->ops;
3175        cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3176        cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3177        cgc->cmd[1] = 1;
3178        cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3179        cgc->data_direction = CGC_DATA_NONE;
3180        return cdo->generic_packet(cdi, cgc);
3181}
3182
3183static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3184                                                 struct packet_command *cgc,
3185                                                 int cmd)
3186{
3187        const struct cdrom_device_ops *cdo = cdi->ops;
3188        cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3189        cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3190        cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3191        cgc->data_direction = CGC_DATA_NONE;
3192        return cdo->generic_packet(cdi, cgc);
3193}
3194
3195static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3196                                              void __user *arg,
3197                                              struct packet_command *cgc)
3198{
3199        int ret;
3200        dvd_struct *s;
3201        int size = sizeof(dvd_struct);
3202
3203        if (!CDROM_CAN(CDC_DVD))
3204                return -ENOSYS;
3205
3206        s = memdup_user(arg, size);
3207        if (IS_ERR(s))
3208                return PTR_ERR(s);
3209
3210        cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3211
3212        ret = dvd_read_struct(cdi, s, cgc);
3213        if (ret)
3214                goto out;
3215
3216        if (copy_to_user(arg, s, size))
3217                ret = -EFAULT;
3218out:
3219        kfree(s);
3220        return ret;
3221}
3222
3223static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3224                                       void __user *arg)
3225{
3226        int ret;
3227        dvd_authinfo ai;
3228        if (!CDROM_CAN(CDC_DVD))
3229                return -ENOSYS;
3230        cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3231        if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3232                return -EFAULT;
3233        ret = dvd_do_auth(cdi, &ai);
3234        if (ret)
3235                return ret;
3236        if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3237                return -EFAULT;
3238        return 0;
3239}
3240
3241static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3242                                                  void __user *arg)
3243{
3244        int ret;
3245        long next = 0;
3246        cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3247        ret = cdrom_get_next_writable(cdi, &next);
3248        if (ret)
3249                return ret;
3250        if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3251                return -EFAULT;
3252        return 0;
3253}
3254
3255static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3256                                                 void __user *arg)
3257{
3258        int ret;
3259        long last = 0;
3260        cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3261        ret = cdrom_get_last_written(cdi, &last);
3262        if (ret)
3263                return ret;
3264        if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3265                return -EFAULT;
3266        return 0;
3267}
3268
3269static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3270                     unsigned long arg)
3271{
3272        struct packet_command cgc;
3273        void __user *userptr = (void __user *)arg;
3274
3275        memset(&cgc, 0, sizeof(cgc));
3276
3277        /* build a unified command and queue it through
3278           cdo->generic_packet() */
3279        switch (cmd) {
3280        case CDROMREADRAW:
3281        case CDROMREADMODE1:
3282        case CDROMREADMODE2:
3283                return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3284        case CDROMREADAUDIO:
3285                return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3286        case CDROMSUBCHNL:
3287                return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3288        case CDROMPLAYMSF:
3289                return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3290        case CDROMPLAYBLK:
3291                return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3292        case CDROMVOLCTRL:
3293        case CDROMVOLREAD:
3294                return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3295        case CDROMSTART:
3296        case CDROMSTOP:
3297                return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3298        case CDROMPAUSE:
3299        case CDROMRESUME:
3300                return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3301        case DVD_READ_STRUCT:
3302                return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3303        case DVD_AUTH:
3304                return mmc_ioctl_dvd_auth(cdi, userptr);
3305        case CDROM_NEXT_WRITABLE:
3306                return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3307        case CDROM_LAST_WRITTEN:
3308                return mmc_ioctl_cdrom_last_written(cdi, userptr);
3309        }
3310
3311        return -ENOTTY;
3312}
3313
3314/*
3315 * Just about every imaginable ioctl is supported in the Uniform layer
3316 * these days.
3317 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3318 */
3319int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3320                fmode_t mode, unsigned int cmd, unsigned long arg)
3321{
3322        void __user *argp = (void __user *)arg;
3323        int ret;
3324
3325        /*
3326         * Try the generic SCSI command ioctl's first.
3327         */
3328        ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3329        if (ret != -ENOTTY)
3330                return ret;
3331
3332        switch (cmd) {
3333        case CDROMMULTISESSION:
3334                return cdrom_ioctl_multisession(cdi, argp);
3335        case CDROMEJECT:
3336                return cdrom_ioctl_eject(cdi);
3337        case CDROMCLOSETRAY:
3338                return cdrom_ioctl_closetray(cdi);
3339        case CDROMEJECT_SW:
3340                return cdrom_ioctl_eject_sw(cdi, arg);
3341        case CDROM_MEDIA_CHANGED:
3342                return cdrom_ioctl_media_changed(cdi, arg);
3343        case CDROM_SET_OPTIONS:
3344                return cdrom_ioctl_set_options(cdi, arg);
3345        case CDROM_CLEAR_OPTIONS:
3346                return cdrom_ioctl_clear_options(cdi, arg);
3347        case CDROM_SELECT_SPEED:
3348                return cdrom_ioctl_select_speed(cdi, arg);
3349        case CDROM_SELECT_DISC:
3350                return cdrom_ioctl_select_disc(cdi, arg);
3351        case CDROMRESET:
3352                return cdrom_ioctl_reset(cdi, bdev);
3353        case CDROM_LOCKDOOR:
3354                return cdrom_ioctl_lock_door(cdi, arg);
3355        case CDROM_DEBUG:
3356                return cdrom_ioctl_debug(cdi, arg);
3357        case CDROM_GET_CAPABILITY:
3358                return cdrom_ioctl_get_capability(cdi);
3359        case CDROM_GET_MCN:
3360                return cdrom_ioctl_get_mcn(cdi, argp);
3361        case CDROM_DRIVE_STATUS:
3362                return cdrom_ioctl_drive_status(cdi, arg);
3363        case CDROM_DISC_STATUS:
3364                return cdrom_ioctl_disc_status(cdi);
3365        case CDROM_CHANGER_NSLOTS:
3366                return cdrom_ioctl_changer_nslots(cdi);
3367        }
3368
3369        /*
3370         * Use the ioctls that are implemented through the generic_packet()
3371         * interface. this may look at bit funny, but if -ENOTTY is
3372         * returned that particular ioctl is not implemented and we
3373         * let it go through the device specific ones.
3374         */
3375        if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3376                ret = mmc_ioctl(cdi, cmd, arg);
3377                if (ret != -ENOTTY)
3378                        return ret;
3379        }
3380
3381        /*
3382         * Note: most of the cd_dbg() calls are commented out here,
3383         * because they fill up the sys log when CD players poll
3384         * the drive.
3385         */
3386        switch (cmd) {
3387        case CDROMSUBCHNL:
3388                return cdrom_ioctl_get_subchnl(cdi, argp);
3389        case CDROMREADTOCHDR:
3390                return cdrom_ioctl_read_tochdr(cdi, argp);
3391        case CDROMREADTOCENTRY:
3392                return cdrom_ioctl_read_tocentry(cdi, argp);
3393        case CDROMPLAYMSF:
3394                return cdrom_ioctl_play_msf(cdi, argp);
3395        case CDROMPLAYTRKIND:
3396                return cdrom_ioctl_play_trkind(cdi, argp);
3397        case CDROMVOLCTRL:
3398                return cdrom_ioctl_volctrl(cdi, argp);
3399        case CDROMVOLREAD:
3400                return cdrom_ioctl_volread(cdi, argp);
3401        case CDROMSTART:
3402        case CDROMSTOP:
3403        case CDROMPAUSE:
3404        case CDROMRESUME:
3405                return cdrom_ioctl_audioctl(cdi, cmd);
3406        }
3407
3408        return -ENOSYS;
3409}
3410
3411EXPORT_SYMBOL(cdrom_get_last_written);
3412EXPORT_SYMBOL(register_cdrom);
3413EXPORT_SYMBOL(unregister_cdrom);
3414EXPORT_SYMBOL(cdrom_open);
3415EXPORT_SYMBOL(cdrom_release);
3416EXPORT_SYMBOL(cdrom_ioctl);
3417EXPORT_SYMBOL(cdrom_media_changed);
3418EXPORT_SYMBOL(cdrom_number_of_slots);
3419EXPORT_SYMBOL(cdrom_mode_select);
3420EXPORT_SYMBOL(cdrom_mode_sense);
3421EXPORT_SYMBOL(init_cdrom_command);
3422EXPORT_SYMBOL(cdrom_get_media_event);
3423
3424#ifdef CONFIG_SYSCTL
3425
3426#define CDROM_STR_SIZE 1000
3427
3428static struct cdrom_sysctl_settings {
3429        char    info[CDROM_STR_SIZE];   /* general info */
3430        int     autoclose;              /* close tray upon mount, etc */
3431        int     autoeject;              /* eject on umount */
3432        int     debug;                  /* turn on debugging messages */
3433        int     lock;                   /* lock the door on device open */
3434        int     check;                  /* check media type */
3435} cdrom_sysctl_settings;
3436
3437enum cdrom_print_option {
3438        CTL_NAME,
3439        CTL_SPEED,
3440        CTL_SLOTS,
3441        CTL_CAPABILITY
3442};
3443
3444static int cdrom_print_info(const char *header, int val, char *info,
3445                                int *pos, enum cdrom_print_option option)
3446{
3447        const int max_size = sizeof(cdrom_sysctl_settings.info);
3448        struct cdrom_device_info *cdi;
3449        int ret;
3450
3451        ret = scnprintf(info + *pos, max_size - *pos, header);
3452        if (!ret)
3453                return 1;
3454
3455        *pos += ret;
3456
3457        list_for_each_entry(cdi, &cdrom_list, list) {
3458                switch (option) {
3459                case CTL_NAME:
3460                        ret = scnprintf(info + *pos, max_size - *pos,
3461                                        "\t%s", cdi->name);
3462                        break;
3463                case CTL_SPEED:
3464                        ret = scnprintf(info + *pos, max_size - *pos,
3465                                        "\t%d", cdi->speed);
3466                        break;
3467                case CTL_SLOTS:
3468                        ret = scnprintf(info + *pos, max_size - *pos,
3469                                        "\t%d", cdi->capacity);
3470                        break;
3471                case CTL_CAPABILITY:
3472                        ret = scnprintf(info + *pos, max_size - *pos,
3473                                        "\t%d", CDROM_CAN(val) != 0);
3474                        break;
3475                default:
3476                        pr_info("invalid option%d\n", option);
3477                        return 1;
3478                }
3479                if (!ret)
3480                        return 1;
3481                *pos += ret;
3482        }
3483
3484        return 0;
3485}
3486
3487static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3488                           void __user *buffer, size_t *lenp, loff_t *ppos)
3489{
3490        int pos;
3491        char *info = cdrom_sysctl_settings.info;
3492        const int max_size = sizeof(cdrom_sysctl_settings.info);
3493        
3494        if (!*lenp || (*ppos && !write)) {
3495                *lenp = 0;
3496                return 0;
3497        }
3498
3499        mutex_lock(&cdrom_mutex);
3500
3501        pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3502        
3503        if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3504                goto done;
3505        if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3506                goto done;
3507        if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3508                goto done;
3509        if (cdrom_print_info("\nCan close tray:\t",
3510                                CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3511                goto done;
3512        if (cdrom_print_info("\nCan open tray:\t",
3513                                CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3514                goto done;
3515        if (cdrom_print_info("\nCan lock tray:\t",
3516                                CDC_LOCK, info, &pos, CTL_CAPABILITY))
3517                goto done;
3518        if (cdrom_print_info("\nCan change speed:",
3519                                CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3520                goto done;
3521        if (cdrom_print_info("\nCan select disk:",
3522                                CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3523                goto done;
3524        if (cdrom_print_info("\nCan read multisession:",
3525                                CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3526                goto done;
3527        if (cdrom_print_info("\nCan read MCN:\t",
3528                                CDC_MCN, info, &pos, CTL_CAPABILITY))
3529                goto done;
3530        if (cdrom_print_info("\nReports media changed:",
3531                                CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3532                goto done;
3533        if (cdrom_print_info("\nCan play audio:\t",
3534                                CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3535                goto done;
3536        if (cdrom_print_info("\nCan write CD-R:\t",
3537                                CDC_CD_R, info, &pos, CTL_CAPABILITY))
3538                goto done;
3539        if (cdrom_print_info("\nCan write CD-RW:",
3540                                CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3541                goto done;
3542        if (cdrom_print_info("\nCan read DVD:\t",
3543                                CDC_DVD, info, &pos, CTL_CAPABILITY))
3544                goto done;
3545        if (cdrom_print_info("\nCan write DVD-R:",
3546                                CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3547                goto done;
3548        if (cdrom_print_info("\nCan write DVD-RAM:",
3549                                CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3550                goto done;
3551        if (cdrom_print_info("\nCan read MRW:\t",
3552                                CDC_MRW, info, &pos, CTL_CAPABILITY))
3553                goto done;
3554        if (cdrom_print_info("\nCan write MRW:\t",
3555                                CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3556                goto done;
3557        if (cdrom_print_info("\nCan write RAM:\t",
3558                                CDC_RAM, info, &pos, CTL_CAPABILITY))
3559                goto done;
3560        if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3561                goto done;
3562doit:
3563        mutex_unlock(&cdrom_mutex);
3564        return proc_dostring(ctl, write, buffer, lenp, ppos);
3565done:
3566        pr_info("info buffer too small\n");
3567        goto doit;
3568}
3569
3570/* Unfortunately, per device settings are not implemented through
3571   procfs/sysctl yet. When they are, this will naturally disappear. For now
3572   just update all drives. Later this will become the template on which
3573   new registered drives will be based. */
3574static void cdrom_update_settings(void)
3575{
3576        struct cdrom_device_info *cdi;
3577
3578        mutex_lock(&cdrom_mutex);
3579        list_for_each_entry(cdi, &cdrom_list, list) {
3580                if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3581                        cdi->options |= CDO_AUTO_CLOSE;
3582                else if (!autoclose)
3583                        cdi->options &= ~CDO_AUTO_CLOSE;
3584                if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3585                        cdi->options |= CDO_AUTO_EJECT;
3586                else if (!autoeject)
3587                        cdi->options &= ~CDO_AUTO_EJECT;
3588                if (lockdoor && CDROM_CAN(CDC_LOCK))
3589                        cdi->options |= CDO_LOCK;
3590                else if (!lockdoor)
3591                        cdi->options &= ~CDO_LOCK;
3592                if (check_media_type)
3593                        cdi->options |= CDO_CHECK_TYPE;
3594                else
3595                        cdi->options &= ~CDO_CHECK_TYPE;
3596        }
3597        mutex_unlock(&cdrom_mutex);
3598}
3599
3600static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3601                                void __user *buffer, size_t *lenp, loff_t *ppos)
3602{
3603        int ret;
3604        
3605        ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3606
3607        if (write) {
3608        
3609                /* we only care for 1 or 0. */
3610                autoclose        = !!cdrom_sysctl_settings.autoclose;
3611                autoeject        = !!cdrom_sysctl_settings.autoeject;
3612                debug            = !!cdrom_sysctl_settings.debug;
3613                lockdoor         = !!cdrom_sysctl_settings.lock;
3614                check_media_type = !!cdrom_sysctl_settings.check;
3615
3616                /* update the option flags according to the changes. we
3617                   don't have per device options through sysctl yet,
3618                   but we will have and then this will disappear. */
3619                cdrom_update_settings();
3620        }
3621
3622        return ret;
3623}
3624
3625/* Place files in /proc/sys/dev/cdrom */
3626static struct ctl_table cdrom_table[] = {
3627        {
3628                .procname       = "info",
3629                .data           = &cdrom_sysctl_settings.info, 
3630                .maxlen         = CDROM_STR_SIZE,
3631                .mode           = 0444,
3632                .proc_handler   = cdrom_sysctl_info,
3633        },
3634        {
3635                .procname       = "autoclose",
3636                .data           = &cdrom_sysctl_settings.autoclose,
3637                .maxlen         = sizeof(int),
3638                .mode           = 0644,
3639                .proc_handler   = cdrom_sysctl_handler,
3640        },
3641        {
3642                .procname       = "autoeject",
3643                .data           = &cdrom_sysctl_settings.autoeject,
3644                .maxlen         = sizeof(int),
3645                .mode           = 0644,
3646                .proc_handler   = cdrom_sysctl_handler,
3647        },
3648        {
3649                .procname       = "debug",
3650                .data           = &cdrom_sysctl_settings.debug,
3651                .maxlen         = sizeof(int),
3652                .mode           = 0644,
3653                .proc_handler   = cdrom_sysctl_handler,
3654        },
3655        {
3656                .procname       = "lock",
3657                .data           = &cdrom_sysctl_settings.lock,
3658                .maxlen         = sizeof(int),
3659                .mode           = 0644,
3660                .proc_handler   = cdrom_sysctl_handler,
3661        },
3662        {
3663                .procname       = "check_media",
3664                .data           = &cdrom_sysctl_settings.check,
3665                .maxlen         = sizeof(int),
3666                .mode           = 0644,
3667                .proc_handler   = cdrom_sysctl_handler
3668        },
3669        { }
3670};
3671
3672static struct ctl_table cdrom_cdrom_table[] = {
3673        {
3674                .procname       = "cdrom",
3675                .maxlen         = 0,
3676                .mode           = 0555,
3677                .child          = cdrom_table,
3678        },
3679        { }
3680};
3681
3682/* Make sure that /proc/sys/dev is there */
3683static struct ctl_table cdrom_root_table[] = {
3684        {
3685                .procname       = "dev",
3686                .maxlen         = 0,
3687                .mode           = 0555,
3688                .child          = cdrom_cdrom_table,
3689        },
3690        { }
3691};
3692static struct ctl_table_header *cdrom_sysctl_header;
3693
3694static void cdrom_sysctl_register(void)
3695{
3696        static int initialized;
3697
3698        if (initialized == 1)
3699                return;
3700
3701        cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3702
3703        /* set the defaults */
3704        cdrom_sysctl_settings.autoclose = autoclose;
3705        cdrom_sysctl_settings.autoeject = autoeject;
3706        cdrom_sysctl_settings.debug = debug;
3707        cdrom_sysctl_settings.lock = lockdoor;
3708        cdrom_sysctl_settings.check = check_media_type;
3709
3710        initialized = 1;
3711}
3712
3713static void cdrom_sysctl_unregister(void)
3714{
3715        if (cdrom_sysctl_header)
3716                unregister_sysctl_table(cdrom_sysctl_header);
3717}
3718
3719#else /* CONFIG_SYSCTL */
3720
3721static void cdrom_sysctl_register(void)
3722{
3723}
3724
3725static void cdrom_sysctl_unregister(void)
3726{
3727}
3728
3729#endif /* CONFIG_SYSCTL */
3730
3731static int __init cdrom_init(void)
3732{
3733        cdrom_sysctl_register();
3734
3735        return 0;
3736}
3737
3738static void __exit cdrom_exit(void)
3739{
3740        pr_info("Uniform CD-ROM driver unloaded\n");
3741        cdrom_sysctl_unregister();
3742}
3743
3744module_init(cdrom_init);
3745module_exit(cdrom_exit);
3746MODULE_LICENSE("GPL");
3747