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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.rst 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 Revision History
18 ----------------------------------
19 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
20 -- Initial version by David A. van Leeuwen. I don't have a detailed
21 changelog for the 1.x series, David?
22
232.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
24 -- New maintainer! As David A. van Leeuwen has been too busy to actively
25 maintain and improve this driver, I am now carrying on the torch. If
26 you have a problem with this driver, please feel free to contact me.
27
28 -- Added (rudimentary) sysctl interface. I realize this is really weak
29 right now, and is _very_ badly implemented. It will be improved...
30
31 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
32 the Uniform CD-ROM driver via the cdrom_count_tracks function.
33 The cdrom_count_tracks function helps resolve some of the false
34 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
35 for the correct media type when mounting or playing audio from a CD.
36
37 -- Remove the calls to verify_area and only use the copy_from_user and
38 copy_to_user stuff, since these calls now provide their own memory
39 checking with the 2.1.x kernels.
40
41 -- Major update to return codes so that errors from low-level drivers
42 are passed on through (thanks to Gerd Knorr for pointing out this
43 problem).
44
45 -- Made it so if a function isn't implemented in a low-level driver,
46 ENOSYS is now returned instead of EINVAL.
47
48 -- Simplified some complex logic so that the source code is easier to read.
49
50 -- Other stuff I probably forgot to mention (lots of changes).
51
522.01 to 2.11 Dec 1997-Jan 1998
53 -- TO-DO! Write changelogs for 2.01 to 2.12.
54
552.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
56 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
57 copy_*_user does not return EFAULT on error, but instead returns the number
58 of bytes not copied. I was returning whatever non-zero stuff came back from
59 the copy_*_user functions directly, which would result in strange errors.
60
612.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
62 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
63 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
64 this out and providing a simple fix.
65 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
66 thanks to Andrea Arcangeli
67 -- Fixed it so that the /proc entry now also shows up when cdrom is
68 compiled into the kernel. Before it only worked when loaded as a module.
69
70 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in cdrom_media_changed and handling of reporting that
72 the media had changed for devices that _don't_ implement media_changed.
73 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
74 -- Made a few things more pedanticly correct.
75
762.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
77 -- New maintainers! Erik was too busy to continue the work on the driver,
78 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
79 will do their best to follow in his footsteps
80
81 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
82 -- Check if drive is capable of doing what we ask before blindly changing
83 cdi->options in various ioctl.
84 -- Added version to proc entry.
85
86 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
87 -- Fixed an error in open_for_data where we would sometimes not return
88 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
89 -- Fixed module usage count - usage was based on /proc/sys/dev
90 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
91 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
92 dev would be removed even though it was used. cdrom.c just illuminated
93 that bug.
94
95 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
97 been "rewritten" because capabilities and options aren't in sync. They
98 should be...
99 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
100 -- Added CDROM_RESET ioctl.
101 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
102 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
103 from parsing /proc/sys/dev/cdrom/info.
104
105 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
106 -- Check capability mask from low level driver when counting tracks as
107 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
108
109 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
110 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
111 CDC_CLOSE_TRAY.
112 -- proc info didn't mask against capabilities mask.
113
114 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
115 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
116 code was duplicated before. Drives that support the generic packet
117 interface are now being fed packets from here instead.
118 -- First attempt at adding support for MMC2 commands - for DVD and
119 CD-R(W) drives. Only the DVD parts are in now - the interface used is
120 the same as for the audio ioctls.
121 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
122 a change to perform device specific ioctls as well.
123 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
124 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
125 and lock.
126 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
127 CD-Rx and DVD capabilities.
128 -- Now default to checking media type.
129 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
130 doing this anyway, with the generic_packet addition.
131
132 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
133 -- Fix up the sysctl handling so that the option flags get set
134 correctly.
135 -- Fix up ioctl handling so the device specific ones actually get
136 called :).
137
138 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
139 -- Fixed volume control on SCSI drives (or others with longer audio
140 page).
141 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
142 <andrewtv@usa.net> for telling me and for having defined the various
143 DVD structures and ioctls in the first place! He designed the original
144 DVD patches for ide-cd and while I rearranged and unified them, the
145 interface is still the same.
146
147 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
148 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
149 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
150 -- Moved the CDROMREADxxx ioctls in here.
151 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
152 and exported functions.
153 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
154 to now read GPCMD_ for the new generic packet interface. All low level
155 drivers are updated as well.
156 -- Various other cleanups.
157
158 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
159 -- Fixed a couple of possible memory leaks (if an operation failed and
160 we didn't free the buffer before returning the error).
161 -- Integrated Uniform CD Changer handling from Richard Sharman
162 <rsharman@pobox.com>.
163 -- Defined CD_DVD and CD_CHANGER log levels.
164 -- Fixed the CDROMREADxxx ioctls.
165 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
166 drives supported it. We lose the index part, however.
167 -- Small modifications to accommodate opens of /dev/hdc1, required
168 for ide-cd to handle multisession discs.
169 -- Export cdrom_mode_sense and cdrom_mode_select.
170 -- init_cdrom_command() for setting up a cgc command.
171
172 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
173 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
174 impossible to send the drive data in a sensible way.
175 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
176 dvd_read_manufact.
177 -- Added setup of write mode for packet writing.
178 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
179 number of frames and split the reads in blocks of 8.
180
181 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
182 -- Added support for changing the region of DVD drives.
183 -- Added sense data to generic command.
184
185 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
186 -- Do same "read header length" trick in cdrom_get_disc_info() as
187 we do in cdrom_get_track_info() -- some drive don't obey specs and
188 fail if they can't supply the full Mt Fuji size table.
189 -- Deleted stuff related to setting up write modes. It has a different
190 home now.
191 -- Clear header length in mode_select unconditionally.
192 -- Removed the register_disk() that was added, not needed here.
193
194 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
195 -- Fix direction flag in setup_send_key and setup_report_key. This
196 gave some SCSI adapters problems.
197 -- Always return -EROFS for write opens
198 -- Convert to module_init/module_exit style init and remove some
199 of the #ifdef MODULE stuff
200 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
201 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
202 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
203 did not clear a 0 sized buffer.
204
205 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
206 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
207 that case switch block size and issue plain READ_10 again, then switch
208 back.
209
210 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
211 -- Fix volume control on CD's - old SCSI-II drives now use their own
212 code, as doing MODE6 stuff in here is really not my intention.
213 -- Use READ_DISC_INFO for more reliable end-of-disc.
214
215 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
216 -- Fix bug in getting rpc phase 2 region info.
217 -- Reinstate "correct" CDROMPLAYTRKIND
218
219 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
220 -- Use quiet bit on packet commands not known to work
221
222 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
223 -- Various fixes and lots of cleanups not listed :-)
224 -- Locking fixes
225 -- Mt Rainier support
226 -- DVD-RAM write open fixes
227
228 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
229 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
230
231 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
232 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
233
234-------------------------------------------------------------------------*/
235
236#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
237
238#define REVISION "Revision: 3.20"
239#define VERSION "Id: cdrom.c 3.20 2003/12/17"
240
241/* I use an error-log mask to give fine grain control over the type of
242 messages dumped to the system logs. The available masks include: */
243#define CD_NOTHING 0x0
244#define CD_WARNING 0x1
245#define CD_REG_UNREG 0x2
246#define CD_DO_IOCTL 0x4
247#define CD_OPEN 0x8
248#define CD_CLOSE 0x10
249#define CD_COUNT_TRACKS 0x20
250#define CD_CHANGER 0x40
251#define CD_DVD 0x80
252
253/* Define this to remove _all_ the debugging messages */
254/* #define ERRLOGMASK CD_NOTHING */
255#define ERRLOGMASK CD_WARNING
256/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
257/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
258
259#include <linux/atomic.h>
260#include <linux/module.h>
261#include <linux/fs.h>
262#include <linux/major.h>
263#include <linux/types.h>
264#include <linux/errno.h>
265#include <linux/kernel.h>
266#include <linux/mm.h>
267#include <linux/nospec.h>
268#include <linux/slab.h>
269#include <linux/cdrom.h>
270#include <linux/sysctl.h>
271#include <linux/proc_fs.h>
272#include <linux/blkpg.h>
273#include <linux/init.h>
274#include <linux/fcntl.h>
275#include <linux/blkdev.h>
276#include <linux/times.h>
277#include <linux/uaccess.h>
278#include <scsi/scsi_common.h>
279
280/* used to tell the module to turn on full debugging messages */
281static bool debug;
282/* default compatibility mode */
283static bool autoclose=1;
284static bool autoeject;
285static bool lockdoor = 1;
286/* will we ever get to use this... sigh. */
287static bool check_media_type;
288/* automatically restart mrw format */
289static bool mrw_format_restart = 1;
290module_param(debug, bool, 0);
291module_param(autoclose, bool, 0);
292module_param(autoeject, bool, 0);
293module_param(lockdoor, bool, 0);
294module_param(check_media_type, bool, 0);
295module_param(mrw_format_restart, bool, 0);
296
297static DEFINE_MUTEX(cdrom_mutex);
298
299static const char *mrw_format_status[] = {
300 "not mrw",
301 "bgformat inactive",
302 "bgformat active",
303 "mrw complete",
304};
305
306static const char *mrw_address_space[] = { "DMA", "GAA" };
307
308#if (ERRLOGMASK != CD_NOTHING)
309#define cd_dbg(type, fmt, ...) \
310do { \
311 if ((ERRLOGMASK & type) || debug == 1) \
312 pr_debug(fmt, ##__VA_ARGS__); \
313} while (0)
314#else
315#define cd_dbg(type, fmt, ...) \
316do { \
317 if (0 && (ERRLOGMASK & type) || debug == 1) \
318 pr_debug(fmt, ##__VA_ARGS__); \
319} while (0)
320#endif
321
322/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
323 a lot of places. This macro makes the code more clear. */
324#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
325
326/*
327 * Another popular OS uses 7 seconds as the hard timeout for default
328 * commands, so it is a good choice for us as well.
329 */
330#define CDROM_DEF_TIMEOUT (7 * HZ)
331
332/* Not-exported routines. */
333
334static void cdrom_sysctl_register(void);
335
336static LIST_HEAD(cdrom_list);
337
338static void signal_media_change(struct cdrom_device_info *cdi)
339{
340 cdi->mc_flags = 0x3; /* set media changed bits, on both queues */
341 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
342}
343
344int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
345 struct packet_command *cgc)
346{
347 if (cgc->sshdr) {
348 cgc->sshdr->sense_key = 0x05;
349 cgc->sshdr->asc = 0x20;
350 cgc->sshdr->ascq = 0x00;
351 }
352
353 cgc->stat = -EIO;
354 return -EIO;
355}
356EXPORT_SYMBOL(cdrom_dummy_generic_packet);
357
358static int cdrom_flush_cache(struct cdrom_device_info *cdi)
359{
360 struct packet_command cgc;
361
362 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
363 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
364
365 cgc.timeout = 5 * 60 * HZ;
366
367 return cdi->ops->generic_packet(cdi, &cgc);
368}
369
370/* requires CD R/RW */
371static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
372 disc_information *di)
373{
374 const struct cdrom_device_ops *cdo = cdi->ops;
375 struct packet_command cgc;
376 int ret, buflen;
377
378 /* set up command and get the disc info */
379 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
380 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
381 cgc.cmd[8] = cgc.buflen = 2;
382 cgc.quiet = 1;
383
384 ret = cdo->generic_packet(cdi, &cgc);
385 if (ret)
386 return ret;
387
388 /* not all drives have the same disc_info length, so requeue
389 * packet with the length the drive tells us it can supply
390 */
391 buflen = be16_to_cpu(di->disc_information_length) +
392 sizeof(di->disc_information_length);
393
394 if (buflen > sizeof(disc_information))
395 buflen = sizeof(disc_information);
396
397 cgc.cmd[8] = cgc.buflen = buflen;
398 ret = cdo->generic_packet(cdi, &cgc);
399 if (ret)
400 return ret;
401
402 /* return actual fill size */
403 return buflen;
404}
405
406/* This macro makes sure we don't have to check on cdrom_device_ops
407 * existence in the run-time routines below. Change_capability is a
408 * hack to have the capability flags defined const, while we can still
409 * change it here without gcc complaining at every line.
410 */
411#define ENSURE(cdo, call, bits) \
412do { \
413 if (cdo->call == NULL) \
414 WARN_ON_ONCE((cdo)->capability & (bits)); \
415} while (0)
416
417/*
418 * the first prototypes used 0x2c as the page code for the mrw mode page,
419 * subsequently this was changed to 0x03. probe the one used by this drive
420 */
421static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
422{
423 struct packet_command cgc;
424 char buffer[16];
425
426 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
427
428 cgc.timeout = HZ;
429 cgc.quiet = 1;
430
431 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
432 cdi->mrw_mode_page = MRW_MODE_PC;
433 return 0;
434 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
435 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
436 return 0;
437 }
438
439 return 1;
440}
441
442static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
443{
444 struct packet_command cgc;
445 struct mrw_feature_desc *mfd;
446 unsigned char buffer[16];
447 int ret;
448
449 *write = 0;
450
451 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
452
453 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
454 cgc.cmd[3] = CDF_MRW;
455 cgc.cmd[8] = sizeof(buffer);
456 cgc.quiet = 1;
457
458 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
459 return ret;
460
461 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
462 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
463 return 1;
464 *write = mfd->write;
465
466 if ((ret = cdrom_mrw_probe_pc(cdi))) {
467 *write = 0;
468 return ret;
469 }
470
471 return 0;
472}
473
474static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
475{
476 struct packet_command cgc;
477 unsigned char buffer[12];
478 int ret;
479
480 pr_info("%sstarting format\n", cont ? "Re" : "");
481
482 /*
483 * FmtData bit set (bit 4), format type is 1
484 */
485 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
486 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
487 cgc.cmd[1] = (1 << 4) | 1;
488
489 cgc.timeout = 5 * 60 * HZ;
490
491 /*
492 * 4 byte format list header, 8 byte format list descriptor
493 */
494 buffer[1] = 1 << 1;
495 buffer[3] = 8;
496
497 /*
498 * nr_blocks field
499 */
500 buffer[4] = 0xff;
501 buffer[5] = 0xff;
502 buffer[6] = 0xff;
503 buffer[7] = 0xff;
504
505 buffer[8] = 0x24 << 2;
506 buffer[11] = cont;
507
508 ret = cdi->ops->generic_packet(cdi, &cgc);
509 if (ret)
510 pr_info("bgformat failed\n");
511
512 return ret;
513}
514
515static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
516{
517 struct packet_command cgc;
518
519 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
520 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
521
522 /*
523 * Session = 1, Track = 0
524 */
525 cgc.cmd[1] = !!immed;
526 cgc.cmd[2] = 1 << 1;
527
528 cgc.timeout = 5 * 60 * HZ;
529
530 return cdi->ops->generic_packet(cdi, &cgc);
531}
532
533static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
534{
535 disc_information di;
536 int ret;
537
538 ret = cdrom_get_disc_info(cdi, &di);
539 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
540 return 1;
541
542 ret = 0;
543 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
544 pr_info("issuing MRW background format suspend\n");
545 ret = cdrom_mrw_bgformat_susp(cdi, 0);
546 }
547
548 if (!ret && cdi->media_written)
549 ret = cdrom_flush_cache(cdi);
550
551 return ret;
552}
553
554static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
555{
556 struct packet_command cgc;
557 struct mode_page_header *mph;
558 char buffer[16];
559 int ret, offset, size;
560
561 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
562
563 cgc.buffer = buffer;
564 cgc.buflen = sizeof(buffer);
565
566 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
567 if (ret)
568 return ret;
569
570 mph = (struct mode_page_header *)buffer;
571 offset = be16_to_cpu(mph->desc_length);
572 size = be16_to_cpu(mph->mode_data_length) + 2;
573
574 buffer[offset + 3] = space;
575 cgc.buflen = size;
576
577 ret = cdrom_mode_select(cdi, &cgc);
578 if (ret)
579 return ret;
580
581 pr_info("%s: mrw address space %s selected\n",
582 cdi->name, mrw_address_space[space]);
583 return 0;
584}
585
586int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi)
587{
588 static char banner_printed;
589 const struct cdrom_device_ops *cdo = cdi->ops;
590
591 cd_dbg(CD_OPEN, "entering register_cdrom\n");
592
593 if (cdo->open == NULL || cdo->release == NULL)
594 return -EINVAL;
595 if (!banner_printed) {
596 pr_info("Uniform CD-ROM driver " REVISION "\n");
597 banner_printed = 1;
598 cdrom_sysctl_register();
599 }
600
601 cdi->disk = disk;
602 disk->cdi = cdi;
603
604 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
605 if (cdo->check_events == NULL)
606 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
607 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
608 ENSURE(cdo, lock_door, CDC_LOCK);
609 ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
610 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
611 ENSURE(cdo, get_mcn, CDC_MCN);
612 ENSURE(cdo, reset, CDC_RESET);
613 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
614 cdi->mc_flags = 0;
615 cdi->options = CDO_USE_FFLAGS;
616 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
617
618 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
619 cdi->options |= (int) CDO_AUTO_CLOSE;
620 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
621 cdi->options |= (int) CDO_AUTO_EJECT;
622 if (lockdoor == 1)
623 cdi->options |= (int) CDO_LOCK;
624 if (check_media_type == 1)
625 cdi->options |= (int) CDO_CHECK_TYPE;
626
627 if (CDROM_CAN(CDC_MRW_W))
628 cdi->exit = cdrom_mrw_exit;
629
630 if (cdi->ops->read_cdda_bpc)
631 cdi->cdda_method = CDDA_BPC_FULL;
632 else
633 cdi->cdda_method = CDDA_OLD;
634
635 WARN_ON(!cdo->generic_packet);
636
637 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
638 mutex_lock(&cdrom_mutex);
639 list_add(&cdi->list, &cdrom_list);
640 mutex_unlock(&cdrom_mutex);
641 return 0;
642}
643EXPORT_SYMBOL(register_cdrom);
644#undef ENSURE
645
646void unregister_cdrom(struct cdrom_device_info *cdi)
647{
648 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
649
650 mutex_lock(&cdrom_mutex);
651 list_del(&cdi->list);
652 mutex_unlock(&cdrom_mutex);
653
654 if (cdi->exit)
655 cdi->exit(cdi);
656
657 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
658}
659EXPORT_SYMBOL(unregister_cdrom);
660
661int cdrom_get_media_event(struct cdrom_device_info *cdi,
662 struct media_event_desc *med)
663{
664 struct packet_command cgc;
665 unsigned char buffer[8];
666 struct event_header *eh = (struct event_header *)buffer;
667
668 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
669 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
670 cgc.cmd[1] = 1; /* IMMED */
671 cgc.cmd[4] = 1 << 4; /* media event */
672 cgc.cmd[8] = sizeof(buffer);
673 cgc.quiet = 1;
674
675 if (cdi->ops->generic_packet(cdi, &cgc))
676 return 1;
677
678 if (be16_to_cpu(eh->data_len) < sizeof(*med))
679 return 1;
680
681 if (eh->nea || eh->notification_class != 0x4)
682 return 1;
683
684 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
685 return 0;
686}
687EXPORT_SYMBOL(cdrom_get_media_event);
688
689static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
690 struct rwrt_feature_desc *rfd)
691{
692 struct packet_command cgc;
693 char buffer[24];
694 int ret;
695
696 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
697
698 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
699 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
700 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
701 cgc.quiet = 1;
702
703 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
704 return ret;
705
706 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
707 return 0;
708}
709
710static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
711{
712 struct packet_command cgc;
713 char buffer[16];
714 __be16 *feature_code;
715 int ret;
716
717 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
718
719 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
720 cgc.cmd[3] = CDF_HWDM;
721 cgc.cmd[8] = sizeof(buffer);
722 cgc.quiet = 1;
723
724 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
725 return ret;
726
727 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
728 if (be16_to_cpu(*feature_code) == CDF_HWDM)
729 return 0;
730
731 return 1;
732}
733
734
735static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
736{
737 struct rwrt_feature_desc rfd;
738 int ret;
739
740 *write = 0;
741
742 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
743 return ret;
744
745 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
746 *write = 1;
747
748 return 0;
749}
750
751static int cdrom_media_erasable(struct cdrom_device_info *cdi)
752{
753 disc_information di;
754 int ret;
755
756 ret = cdrom_get_disc_info(cdi, &di);
757 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
758 return -1;
759
760 return di.erasable;
761}
762
763/*
764 * FIXME: check RO bit
765 */
766static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
767{
768 int ret = cdrom_media_erasable(cdi);
769
770 /*
771 * allow writable open if media info read worked and media is
772 * erasable, _or_ if it fails since not all drives support it
773 */
774 if (!ret)
775 return 1;
776
777 return 0;
778}
779
780static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
781{
782 disc_information di;
783 int ret;
784
785 /*
786 * always reset to DMA lba space on open
787 */
788 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
789 pr_err("failed setting lba address space\n");
790 return 1;
791 }
792
793 ret = cdrom_get_disc_info(cdi, &di);
794 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
795 return 1;
796
797 if (!di.erasable)
798 return 1;
799
800 /*
801 * mrw_status
802 * 0 - not MRW formatted
803 * 1 - MRW bgformat started, but not running or complete
804 * 2 - MRW bgformat in progress
805 * 3 - MRW formatting complete
806 */
807 ret = 0;
808 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
809 if (!di.mrw_status)
810 ret = 1;
811 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
812 mrw_format_restart)
813 ret = cdrom_mrw_bgformat(cdi, 1);
814
815 return ret;
816}
817
818static int mo_open_write(struct cdrom_device_info *cdi)
819{
820 struct packet_command cgc;
821 char buffer[255];
822 int ret;
823
824 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
825 cgc.quiet = 1;
826
827 /*
828 * obtain write protect information as per
829 * drivers/scsi/sd.c:sd_read_write_protect_flag
830 */
831
832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
833 if (ret)
834 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
835 if (ret) {
836 cgc.buflen = 255;
837 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
838 }
839
840 /* drive gave us no info, let the user go ahead */
841 if (ret)
842 return 0;
843
844 return buffer[3] & 0x80;
845}
846
847static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
848{
849 struct rwrt_feature_desc rfd;
850 int ret;
851
852 if ((ret = cdrom_has_defect_mgt(cdi)))
853 return ret;
854
855 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
856 return ret;
857 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
858 ret = !rfd.curr;
859
860 cd_dbg(CD_OPEN, "can open for random write\n");
861 return ret;
862}
863
864static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
865{
866 struct packet_command cgc;
867 char buffer[32];
868 int mmc3_profile;
869
870 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
871
872 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
873 cgc.cmd[1] = 0;
874 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
875 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
876 cgc.quiet = 1;
877
878 if (cdi->ops->generic_packet(cdi, &cgc))
879 mmc3_profile = 0xffff;
880 else
881 mmc3_profile = (buffer[6] << 8) | buffer[7];
882
883 cdi->mmc3_profile = mmc3_profile;
884}
885
886static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
887{
888 switch (cdi->mmc3_profile) {
889 case 0x12: /* DVD-RAM */
890 case 0x1A: /* DVD+RW */
891 case 0x43: /* BD-RE */
892 return 0;
893 default:
894 return 1;
895 }
896}
897
898/*
899 * returns 0 for ok to open write, non-0 to disallow
900 */
901static int cdrom_open_write(struct cdrom_device_info *cdi)
902{
903 int mrw, mrw_write, ram_write;
904 int ret = 1;
905
906 mrw = 0;
907 if (!cdrom_is_mrw(cdi, &mrw_write))
908 mrw = 1;
909
910 if (CDROM_CAN(CDC_MO_DRIVE))
911 ram_write = 1;
912 else
913 (void) cdrom_is_random_writable(cdi, &ram_write);
914
915 if (mrw)
916 cdi->mask &= ~CDC_MRW;
917 else
918 cdi->mask |= CDC_MRW;
919
920 if (mrw_write)
921 cdi->mask &= ~CDC_MRW_W;
922 else
923 cdi->mask |= CDC_MRW_W;
924
925 if (ram_write)
926 cdi->mask &= ~CDC_RAM;
927 else
928 cdi->mask |= CDC_RAM;
929
930 if (CDROM_CAN(CDC_MRW_W))
931 ret = cdrom_mrw_open_write(cdi);
932 else if (CDROM_CAN(CDC_DVD_RAM))
933 ret = cdrom_dvdram_open_write(cdi);
934 else if (CDROM_CAN(CDC_RAM) &&
935 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
936 ret = cdrom_ram_open_write(cdi);
937 else if (CDROM_CAN(CDC_MO_DRIVE))
938 ret = mo_open_write(cdi);
939 else if (!cdrom_is_dvd_rw(cdi))
940 ret = 0;
941
942 return ret;
943}
944
945static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
946{
947 struct packet_command cgc;
948
949 if (cdi->mmc3_profile != 0x1a) {
950 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
951 return;
952 }
953
954 if (!cdi->media_written) {
955 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
956 return;
957 }
958
959 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
960
961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
962 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
963 cgc.timeout = 30*HZ;
964 cdi->ops->generic_packet(cdi, &cgc);
965
966 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
967 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
968 cgc.timeout = 3000*HZ;
969 cgc.quiet = 1;
970 cdi->ops->generic_packet(cdi, &cgc);
971
972 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
973 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
974 cgc.cmd[2] = 2; /* Close session */
975 cgc.quiet = 1;
976 cgc.timeout = 3000*HZ;
977 cdi->ops->generic_packet(cdi, &cgc);
978
979 cdi->media_written = 0;
980}
981
982/* badly broken, I know. Is due for a fixup anytime. */
983static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
984{
985 struct cdrom_tochdr header;
986 struct cdrom_tocentry entry;
987 int ret, i;
988 tracks->data = 0;
989 tracks->audio = 0;
990 tracks->cdi = 0;
991 tracks->xa = 0;
992 tracks->error = 0;
993 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
994
995 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
996 tracks->error = CDS_NO_INFO;
997 return;
998 }
999
1000 /* Grab the TOC header so we can see how many tracks there are */
1001 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1002 if (ret) {
1003 if (ret == -ENOMEDIUM)
1004 tracks->error = CDS_NO_DISC;
1005 else
1006 tracks->error = CDS_NO_INFO;
1007 return;
1008 }
1009 /* check what type of tracks are on this disc */
1010 entry.cdte_format = CDROM_MSF;
1011 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1012 entry.cdte_track = i;
1013 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1014 tracks->error = CDS_NO_INFO;
1015 return;
1016 }
1017 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1018 if (entry.cdte_format == 0x10)
1019 tracks->cdi++;
1020 else if (entry.cdte_format == 0x20)
1021 tracks->xa++;
1022 else
1023 tracks->data++;
1024 } else {
1025 tracks->audio++;
1026 }
1027 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1028 i, entry.cdte_format, entry.cdte_ctrl);
1029 }
1030 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1031 header.cdth_trk1, tracks->audio, tracks->data,
1032 tracks->cdi, tracks->xa);
1033}
1034
1035static
1036int open_for_data(struct cdrom_device_info *cdi)
1037{
1038 int ret;
1039 const struct cdrom_device_ops *cdo = cdi->ops;
1040 tracktype tracks;
1041 cd_dbg(CD_OPEN, "entering open_for_data\n");
1042 /* Check if the driver can report drive status. If it can, we
1043 can do clever things. If it can't, well, we at least tried! */
1044 if (cdo->drive_status != NULL) {
1045 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1046 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1047 if (ret == CDS_TRAY_OPEN) {
1048 cd_dbg(CD_OPEN, "the tray is open...\n");
1049 /* can/may i close it? */
1050 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1051 cdi->options & CDO_AUTO_CLOSE) {
1052 cd_dbg(CD_OPEN, "trying to close the tray\n");
1053 ret=cdo->tray_move(cdi,0);
1054 if (ret) {
1055 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1056 /* Ignore the error from the low
1057 level driver. We don't care why it
1058 couldn't close the tray. We only care
1059 that there is no disc in the drive,
1060 since that is the _REAL_ problem here.*/
1061 ret=-ENOMEDIUM;
1062 goto clean_up_and_return;
1063 }
1064 } else {
1065 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1066 ret=-ENOMEDIUM;
1067 goto clean_up_and_return;
1068 }
1069 /* Ok, the door should be closed now.. Check again */
1070 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1072 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1073 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 cd_dbg(CD_OPEN, "the tray is now closed\n");
1078 }
1079 /* the door should be closed now, check for the disc */
1080 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1081 if (ret!=CDS_DISC_OK) {
1082 ret = -ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 }
1086 cdrom_count_tracks(cdi, &tracks);
1087 if (tracks.error == CDS_NO_DISC) {
1088 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1089 ret=-ENOMEDIUM;
1090 goto clean_up_and_return;
1091 }
1092 /* CD-Players which don't use O_NONBLOCK, workman
1093 * for example, need bit CDO_CHECK_TYPE cleared! */
1094 if (tracks.data==0) {
1095 if (cdi->options & CDO_CHECK_TYPE) {
1096 /* give people a warning shot, now that CDO_CHECK_TYPE
1097 is the default case! */
1098 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1099 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1100 (unsigned int)task_pid_nr(current));
1101 ret=-EMEDIUMTYPE;
1102 goto clean_up_and_return;
1103 }
1104 else {
1105 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1106 }
1107 }
1108
1109 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1110
1111 /* all seems well, we can open the device */
1112 ret = cdo->open(cdi, 0); /* open for data */
1113 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1114 /* After all this careful checking, we shouldn't have problems
1115 opening the device, but we don't want the device locked if
1116 this somehow fails... */
1117 if (ret) {
1118 cd_dbg(CD_OPEN, "open device failed\n");
1119 goto clean_up_and_return;
1120 }
1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1122 cdo->lock_door(cdi, 1);
1123 cd_dbg(CD_OPEN, "door locked\n");
1124 }
1125 cd_dbg(CD_OPEN, "device opened successfully\n");
1126 return ret;
1127
1128 /* Something failed. Try to unlock the drive, because some drivers
1129 (notably ide-cd) lock the drive after every command. This produced
1130 a nasty bug where after mount failed, the drive would remain locked!
1131 This ensures that the drive gets unlocked after a mount fails. This
1132 is a goto to avoid bloating the driver with redundant code. */
1133clean_up_and_return:
1134 cd_dbg(CD_OPEN, "open failed\n");
1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1136 cdo->lock_door(cdi, 0);
1137 cd_dbg(CD_OPEN, "door unlocked\n");
1138 }
1139 return ret;
1140}
1141
1142/* We use the open-option O_NONBLOCK to indicate that the
1143 * purpose of opening is only for subsequent ioctl() calls; no device
1144 * integrity checks are performed.
1145 *
1146 * We hope that all cd-player programs will adopt this convention. It
1147 * is in their own interest: device control becomes a lot easier
1148 * this way.
1149 */
1150int cdrom_open(struct cdrom_device_info *cdi, blk_mode_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 & BLK_OPEN_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 if (CDROM_CAN(CDC_GENERIC_PACKET))
1166 cdrom_mmc3_profile(cdi);
1167 if (mode & BLK_OPEN_WRITE) {
1168 ret = -EROFS;
1169 if (cdrom_open_write(cdi))
1170 goto err_release;
1171 if (!CDROM_CAN(CDC_RAM))
1172 goto err_release;
1173 ret = 0;
1174 cdi->media_written = 0;
1175 }
1176 cdi->opened_for_data = true;
1177 }
1178
1179 if (ret)
1180 goto err;
1181
1182 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1183 cdi->name, cdi->use_count);
1184 return 0;
1185err_release:
1186 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1187 cdi->ops->lock_door(cdi, 0);
1188 cd_dbg(CD_OPEN, "door unlocked\n");
1189 }
1190 cdi->ops->release(cdi);
1191err:
1192 cdi->use_count--;
1193 return ret;
1194}
1195EXPORT_SYMBOL(cdrom_open);
1196
1197/* This code is similar to that in open_for_data. The routine is called
1198 whenever an audio play operation is requested.
1199*/
1200static int check_for_audio_disc(struct cdrom_device_info *cdi,
1201 const struct cdrom_device_ops *cdo)
1202{
1203 int ret;
1204 tracktype tracks;
1205 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1206 if (!(cdi->options & CDO_CHECK_TYPE))
1207 return 0;
1208 if (cdo->drive_status != NULL) {
1209 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1210 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1211 if (ret == CDS_TRAY_OPEN) {
1212 cd_dbg(CD_OPEN, "the tray is open...\n");
1213 /* can/may i close it? */
1214 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1215 cdi->options & CDO_AUTO_CLOSE) {
1216 cd_dbg(CD_OPEN, "trying to close the tray\n");
1217 ret=cdo->tray_move(cdi,0);
1218 if (ret) {
1219 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1220 /* Ignore the error from the low
1221 level driver. We don't care why it
1222 couldn't close the tray. We only care
1223 that there is no disc in the drive,
1224 since that is the _REAL_ problem here.*/
1225 return -ENOMEDIUM;
1226 }
1227 } else {
1228 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1229 return -ENOMEDIUM;
1230 }
1231 /* Ok, the door should be closed now.. Check again */
1232 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1233 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1234 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1235 return -ENOMEDIUM;
1236 }
1237 if (ret!=CDS_DISC_OK) {
1238 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1239 return -EIO;
1240 }
1241 cd_dbg(CD_OPEN, "the tray is now closed\n");
1242 }
1243 }
1244 cdrom_count_tracks(cdi, &tracks);
1245 if (tracks.error)
1246 return(tracks.error);
1247
1248 if (tracks.audio==0)
1249 return -EMEDIUMTYPE;
1250
1251 return 0;
1252}
1253
1254void cdrom_release(struct cdrom_device_info *cdi)
1255{
1256 const struct cdrom_device_ops *cdo = cdi->ops;
1257
1258 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1259
1260 if (cdi->use_count > 0)
1261 cdi->use_count--;
1262
1263 if (cdi->use_count == 0) {
1264 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1265 cdi->name);
1266 cdrom_dvd_rw_close_write(cdi);
1267
1268 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1269 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1270 cdo->lock_door(cdi, 0);
1271 }
1272 }
1273
1274 cdo->release(cdi);
1275
1276 if (cdi->use_count == 0 && cdi->opened_for_data) {
1277 if (cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1278 cdo->tray_move(cdi, 1);
1279 cdi->opened_for_data = false;
1280 }
1281}
1282EXPORT_SYMBOL(cdrom_release);
1283
1284static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1285 struct cdrom_changer_info *buf)
1286{
1287 struct packet_command cgc;
1288 const struct cdrom_device_ops *cdo = cdi->ops;
1289 int length;
1290
1291 /*
1292 * Sanyo changer isn't spec compliant (doesn't use regular change
1293 * LOAD_UNLOAD command, and it doesn't implement the mech status
1294 * command below
1295 */
1296 if (cdi->sanyo_slot) {
1297 buf->hdr.nslots = 3;
1298 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1299 for (length = 0; length < 3; length++) {
1300 buf->slots[length].disc_present = 1;
1301 buf->slots[length].change = 0;
1302 }
1303 return 0;
1304 }
1305
1306 length = sizeof(struct cdrom_mechstat_header) +
1307 cdi->capacity * sizeof(struct cdrom_slot);
1308
1309 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1310 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1311 cgc.cmd[8] = (length >> 8) & 0xff;
1312 cgc.cmd[9] = length & 0xff;
1313 return cdo->generic_packet(cdi, &cgc);
1314}
1315
1316static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1317{
1318 struct cdrom_changer_info *info;
1319 int ret;
1320
1321 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1322 if (cdi->sanyo_slot)
1323 return CDS_NO_INFO;
1324
1325 info = kmalloc(sizeof(*info), GFP_KERNEL);
1326 if (!info)
1327 return -ENOMEM;
1328
1329 if ((ret = cdrom_read_mech_status(cdi, info)))
1330 goto out_free;
1331
1332 if (info->slots[slot].disc_present)
1333 ret = CDS_DISC_OK;
1334 else
1335 ret = CDS_NO_DISC;
1336
1337out_free:
1338 kfree(info);
1339 return ret;
1340}
1341
1342/* Return the number of slots for an ATAPI/SCSI cdrom,
1343 * return 1 if not a changer.
1344 */
1345int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1346{
1347 int nslots = 1;
1348 struct cdrom_changer_info *info;
1349
1350 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1351 /* cdrom_read_mech_status requires a valid value for capacity: */
1352 cdi->capacity = 0;
1353
1354 info = kmalloc(sizeof(*info), GFP_KERNEL);
1355 if (!info)
1356 return -ENOMEM;
1357
1358 if (cdrom_read_mech_status(cdi, info) == 0)
1359 nslots = info->hdr.nslots;
1360
1361 kfree(info);
1362 return nslots;
1363}
1364EXPORT_SYMBOL(cdrom_number_of_slots);
1365
1366
1367/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1368static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1369{
1370 struct packet_command cgc;
1371
1372 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1373 if (cdi->sanyo_slot && slot < 0)
1374 return 0;
1375
1376 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1377 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1378 cgc.cmd[4] = 2 + (slot >= 0);
1379 cgc.cmd[8] = slot;
1380 cgc.timeout = 60 * HZ;
1381
1382 /* The Sanyo 3 CD changer uses byte 7 of the
1383 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1384 using the GPCMD_LOAD_UNLOAD opcode. */
1385 if (cdi->sanyo_slot && -1 < slot) {
1386 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1387 cgc.cmd[7] = slot;
1388 cgc.cmd[4] = cgc.cmd[8] = 0;
1389 cdi->sanyo_slot = slot ? slot : 3;
1390 }
1391
1392 return cdi->ops->generic_packet(cdi, &cgc);
1393}
1394
1395static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1396{
1397 struct cdrom_changer_info *info;
1398 int curslot;
1399 int ret;
1400
1401 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1402 if (!CDROM_CAN(CDC_SELECT_DISC))
1403 return -EDRIVE_CANT_DO_THIS;
1404
1405 if (cdi->ops->check_events)
1406 cdi->ops->check_events(cdi, 0, slot);
1407
1408 if (slot == CDSL_NONE) {
1409 signal_media_change(cdi);
1410 return cdrom_load_unload(cdi, -1);
1411 }
1412
1413 info = kmalloc(sizeof(*info), GFP_KERNEL);
1414 if (!info)
1415 return -ENOMEM;
1416
1417 if ((ret = cdrom_read_mech_status(cdi, info))) {
1418 kfree(info);
1419 return ret;
1420 }
1421
1422 curslot = info->hdr.curslot;
1423 kfree(info);
1424
1425 if (cdi->use_count > 1 || cdi->keeplocked) {
1426 if (slot == CDSL_CURRENT) {
1427 return curslot;
1428 } else {
1429 return -EBUSY;
1430 }
1431 }
1432
1433 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1434 which is useful if it had been previously unloaded.
1435 Whether it can or not, it returns the current slot.
1436 Similarly, if slot happens to be the current one, we still
1437 try and load it. */
1438 if (slot == CDSL_CURRENT)
1439 slot = curslot;
1440
1441 /* set media changed bits on both queues */
1442 signal_media_change(cdi);
1443 if ((ret = cdrom_load_unload(cdi, slot)))
1444 return ret;
1445
1446 return slot;
1447}
1448
1449/*
1450 * As cdrom implements an extra ioctl consumer for media changed
1451 * event, it needs to buffer ->check_events() output, such that event
1452 * is not lost for both the usual VFS and ioctl paths.
1453 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1454 * path.
1455 *
1456 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1457 * called in parallel and buffering fields are accessed without any
1458 * exclusion. The original media_changed code had the same problem.
1459 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1460 * and remove this cruft altogether. It doesn't have much usefulness
1461 * at this point.
1462 */
1463static void cdrom_update_events(struct cdrom_device_info *cdi,
1464 unsigned int clearing)
1465{
1466 unsigned int events;
1467
1468 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1469 cdi->vfs_events |= events;
1470 cdi->ioctl_events |= events;
1471}
1472
1473unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1474 unsigned int clearing)
1475{
1476 unsigned int events;
1477
1478 cdrom_update_events(cdi, clearing);
1479 events = cdi->vfs_events;
1480 cdi->vfs_events = 0;
1481 return events;
1482}
1483EXPORT_SYMBOL(cdrom_check_events);
1484
1485/* We want to make media_changed accessible to the user through an
1486 * ioctl. The main problem now is that we must double-buffer the
1487 * low-level implementation, to assure that the VFS and the user both
1488 * see a medium change once.
1489 */
1490
1491static
1492int media_changed(struct cdrom_device_info *cdi, int queue)
1493{
1494 unsigned int mask = (1 << (queue & 1));
1495 int ret = !!(cdi->mc_flags & mask);
1496 bool changed;
1497
1498 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1499 return ret;
1500
1501 /* changed since last call? */
1502 BUG_ON(!queue); /* shouldn't be called from VFS path */
1503 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1504 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1505 cdi->ioctl_events = 0;
1506
1507 if (changed) {
1508 signal_media_change(cdi);
1509 ret |= 1;
1510 cdi->media_written = 0;
1511 }
1512
1513 cdi->mc_flags &= ~mask; /* clear bit */
1514 return ret;
1515}
1516
1517/* Requests to the low-level drivers will /always/ be done in the
1518 following format convention:
1519
1520 CDROM_LBA: all data-related requests.
1521 CDROM_MSF: all audio-related requests.
1522
1523 However, a low-level implementation is allowed to refuse this
1524 request, and return information in its own favorite format.
1525
1526 It doesn't make sense /at all/ to ask for a play_audio in LBA
1527 format, or ask for multi-session info in MSF format. However, for
1528 backward compatibility these format requests will be satisfied, but
1529 the requests to the low-level drivers will be sanitized in the more
1530 meaningful format indicated above.
1531 */
1532
1533static
1534void sanitize_format(union cdrom_addr *addr,
1535 u_char * curr, u_char requested)
1536{
1537 if (*curr == requested)
1538 return; /* nothing to be done! */
1539 if (requested == CDROM_LBA) {
1540 addr->lba = (int) addr->msf.frame +
1541 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1542 } else { /* CDROM_MSF */
1543 int lba = addr->lba;
1544 addr->msf.frame = lba % 75;
1545 lba /= 75;
1546 lba += 2;
1547 addr->msf.second = lba % 60;
1548 addr->msf.minute = lba / 60;
1549 }
1550 *curr = requested;
1551}
1552
1553void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1554 int type)
1555{
1556 memset(cgc, 0, sizeof(struct packet_command));
1557 if (buf)
1558 memset(buf, 0, len);
1559 cgc->buffer = (char *) buf;
1560 cgc->buflen = len;
1561 cgc->data_direction = type;
1562 cgc->timeout = CDROM_DEF_TIMEOUT;
1563}
1564EXPORT_SYMBOL(init_cdrom_command);
1565
1566/* DVD handling */
1567
1568#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1569#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1570
1571static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1572{
1573 cgc->cmd[0] = GPCMD_REPORT_KEY;
1574 cgc->cmd[10] = type | (agid << 6);
1575 switch (type) {
1576 case 0: case 8: case 5: {
1577 cgc->buflen = 8;
1578 break;
1579 }
1580 case 1: {
1581 cgc->buflen = 16;
1582 break;
1583 }
1584 case 2: case 4: {
1585 cgc->buflen = 12;
1586 break;
1587 }
1588 }
1589 cgc->cmd[9] = cgc->buflen;
1590 cgc->data_direction = CGC_DATA_READ;
1591}
1592
1593static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1594{
1595 cgc->cmd[0] = GPCMD_SEND_KEY;
1596 cgc->cmd[10] = type | (agid << 6);
1597 switch (type) {
1598 case 1: {
1599 cgc->buflen = 16;
1600 break;
1601 }
1602 case 3: {
1603 cgc->buflen = 12;
1604 break;
1605 }
1606 case 6: {
1607 cgc->buflen = 8;
1608 break;
1609 }
1610 }
1611 cgc->cmd[9] = cgc->buflen;
1612 cgc->data_direction = CGC_DATA_WRITE;
1613}
1614
1615static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1616{
1617 int ret;
1618 u_char buf[20];
1619 struct packet_command cgc;
1620 const struct cdrom_device_ops *cdo = cdi->ops;
1621 rpc_state_t rpc_state;
1622
1623 memset(buf, 0, sizeof(buf));
1624 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1625
1626 switch (ai->type) {
1627 /* LU data send */
1628 case DVD_LU_SEND_AGID:
1629 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1630 cgc.quiet = 1;
1631 setup_report_key(&cgc, ai->lsa.agid, 0);
1632
1633 if ((ret = cdo->generic_packet(cdi, &cgc)))
1634 return ret;
1635
1636 ai->lsa.agid = buf[7] >> 6;
1637 /* Returning data, let host change state */
1638 break;
1639
1640 case DVD_LU_SEND_KEY1:
1641 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1642 setup_report_key(&cgc, ai->lsk.agid, 2);
1643
1644 if ((ret = cdo->generic_packet(cdi, &cgc)))
1645 return ret;
1646
1647 copy_key(ai->lsk.key, &buf[4]);
1648 /* Returning data, let host change state */
1649 break;
1650
1651 case DVD_LU_SEND_CHALLENGE:
1652 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1653 setup_report_key(&cgc, ai->lsc.agid, 1);
1654
1655 if ((ret = cdo->generic_packet(cdi, &cgc)))
1656 return ret;
1657
1658 copy_chal(ai->lsc.chal, &buf[4]);
1659 /* Returning data, let host change state */
1660 break;
1661
1662 /* Post-auth key */
1663 case DVD_LU_SEND_TITLE_KEY:
1664 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1665 cgc.quiet = 1;
1666 setup_report_key(&cgc, ai->lstk.agid, 4);
1667 cgc.cmd[5] = ai->lstk.lba;
1668 cgc.cmd[4] = ai->lstk.lba >> 8;
1669 cgc.cmd[3] = ai->lstk.lba >> 16;
1670 cgc.cmd[2] = ai->lstk.lba >> 24;
1671
1672 if ((ret = cdo->generic_packet(cdi, &cgc)))
1673 return ret;
1674
1675 ai->lstk.cpm = (buf[4] >> 7) & 1;
1676 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1677 ai->lstk.cgms = (buf[4] >> 4) & 3;
1678 copy_key(ai->lstk.title_key, &buf[5]);
1679 /* Returning data, let host change state */
1680 break;
1681
1682 case DVD_LU_SEND_ASF:
1683 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1684 setup_report_key(&cgc, ai->lsasf.agid, 5);
1685
1686 if ((ret = cdo->generic_packet(cdi, &cgc)))
1687 return ret;
1688
1689 ai->lsasf.asf = buf[7] & 1;
1690 break;
1691
1692 /* LU data receive (LU changes state) */
1693 case DVD_HOST_SEND_CHALLENGE:
1694 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1695 setup_send_key(&cgc, ai->hsc.agid, 1);
1696 buf[1] = 0xe;
1697 copy_chal(&buf[4], ai->hsc.chal);
1698
1699 if ((ret = cdo->generic_packet(cdi, &cgc)))
1700 return ret;
1701
1702 ai->type = DVD_LU_SEND_KEY1;
1703 break;
1704
1705 case DVD_HOST_SEND_KEY2:
1706 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1707 setup_send_key(&cgc, ai->hsk.agid, 3);
1708 buf[1] = 0xa;
1709 copy_key(&buf[4], ai->hsk.key);
1710
1711 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1712 ai->type = DVD_AUTH_FAILURE;
1713 return ret;
1714 }
1715 ai->type = DVD_AUTH_ESTABLISHED;
1716 break;
1717
1718 /* Misc */
1719 case DVD_INVALIDATE_AGID:
1720 cgc.quiet = 1;
1721 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1722 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1723 if ((ret = cdo->generic_packet(cdi, &cgc)))
1724 return ret;
1725 break;
1726
1727 /* Get region settings */
1728 case DVD_LU_SEND_RPC_STATE:
1729 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1730 setup_report_key(&cgc, 0, 8);
1731 memset(&rpc_state, 0, sizeof(rpc_state_t));
1732 cgc.buffer = (char *) &rpc_state;
1733
1734 if ((ret = cdo->generic_packet(cdi, &cgc)))
1735 return ret;
1736
1737 ai->lrpcs.type = rpc_state.type_code;
1738 ai->lrpcs.vra = rpc_state.vra;
1739 ai->lrpcs.ucca = rpc_state.ucca;
1740 ai->lrpcs.region_mask = rpc_state.region_mask;
1741 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1742 break;
1743
1744 /* Set region settings */
1745 case DVD_HOST_SEND_RPC_STATE:
1746 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1747 setup_send_key(&cgc, 0, 6);
1748 buf[1] = 6;
1749 buf[4] = ai->hrpcs.pdrc;
1750
1751 if ((ret = cdo->generic_packet(cdi, &cgc)))
1752 return ret;
1753 break;
1754
1755 default:
1756 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1757 return -ENOTTY;
1758 }
1759
1760 return 0;
1761}
1762
1763static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1764 struct packet_command *cgc)
1765{
1766 unsigned char buf[21], *base;
1767 struct dvd_layer *layer;
1768 const struct cdrom_device_ops *cdo = cdi->ops;
1769 int ret, layer_num = s->physical.layer_num;
1770
1771 if (layer_num >= DVD_LAYERS)
1772 return -EINVAL;
1773
1774 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1775 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1776 cgc->cmd[6] = layer_num;
1777 cgc->cmd[7] = s->type;
1778 cgc->cmd[9] = cgc->buflen & 0xff;
1779
1780 /*
1781 * refrain from reporting errors on non-existing layers (mainly)
1782 */
1783 cgc->quiet = 1;
1784
1785 ret = cdo->generic_packet(cdi, cgc);
1786 if (ret)
1787 return ret;
1788
1789 base = &buf[4];
1790 layer = &s->physical.layer[layer_num];
1791
1792 /*
1793 * place the data... really ugly, but at least we won't have to
1794 * worry about endianess in userspace.
1795 */
1796 memset(layer, 0, sizeof(*layer));
1797 layer->book_version = base[0] & 0xf;
1798 layer->book_type = base[0] >> 4;
1799 layer->min_rate = base[1] & 0xf;
1800 layer->disc_size = base[1] >> 4;
1801 layer->layer_type = base[2] & 0xf;
1802 layer->track_path = (base[2] >> 4) & 1;
1803 layer->nlayers = (base[2] >> 5) & 3;
1804 layer->track_density = base[3] & 0xf;
1805 layer->linear_density = base[3] >> 4;
1806 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1807 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1808 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1809 layer->bca = base[16] >> 7;
1810
1811 return 0;
1812}
1813
1814static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1815 struct packet_command *cgc)
1816{
1817 int ret;
1818 u_char buf[8];
1819 const struct cdrom_device_ops *cdo = cdi->ops;
1820
1821 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1822 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1823 cgc->cmd[6] = s->copyright.layer_num;
1824 cgc->cmd[7] = s->type;
1825 cgc->cmd[8] = cgc->buflen >> 8;
1826 cgc->cmd[9] = cgc->buflen & 0xff;
1827
1828 ret = cdo->generic_packet(cdi, cgc);
1829 if (ret)
1830 return ret;
1831
1832 s->copyright.cpst = buf[4];
1833 s->copyright.rmi = buf[5];
1834
1835 return 0;
1836}
1837
1838static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1839 struct packet_command *cgc)
1840{
1841 int ret, size;
1842 u_char *buf;
1843 const struct cdrom_device_ops *cdo = cdi->ops;
1844
1845 size = sizeof(s->disckey.value) + 4;
1846
1847 buf = kmalloc(size, GFP_KERNEL);
1848 if (!buf)
1849 return -ENOMEM;
1850
1851 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1852 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1853 cgc->cmd[7] = s->type;
1854 cgc->cmd[8] = size >> 8;
1855 cgc->cmd[9] = size & 0xff;
1856 cgc->cmd[10] = s->disckey.agid << 6;
1857
1858 ret = cdo->generic_packet(cdi, cgc);
1859 if (!ret)
1860 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1861
1862 kfree(buf);
1863 return ret;
1864}
1865
1866static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1867 struct packet_command *cgc)
1868{
1869 int ret, size = 4 + 188;
1870 u_char *buf;
1871 const struct cdrom_device_ops *cdo = cdi->ops;
1872
1873 buf = kmalloc(size, GFP_KERNEL);
1874 if (!buf)
1875 return -ENOMEM;
1876
1877 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1878 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1879 cgc->cmd[7] = s->type;
1880 cgc->cmd[9] = cgc->buflen & 0xff;
1881
1882 ret = cdo->generic_packet(cdi, cgc);
1883 if (ret)
1884 goto out;
1885
1886 s->bca.len = buf[0] << 8 | buf[1];
1887 if (s->bca.len < 12 || s->bca.len > 188) {
1888 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1889 s->bca.len);
1890 ret = -EIO;
1891 goto out;
1892 }
1893 memcpy(s->bca.value, &buf[4], s->bca.len);
1894 ret = 0;
1895out:
1896 kfree(buf);
1897 return ret;
1898}
1899
1900static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1901 struct packet_command *cgc)
1902{
1903 int ret = 0, size;
1904 u_char *buf;
1905 const struct cdrom_device_ops *cdo = cdi->ops;
1906
1907 size = sizeof(s->manufact.value) + 4;
1908
1909 buf = kmalloc(size, GFP_KERNEL);
1910 if (!buf)
1911 return -ENOMEM;
1912
1913 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1914 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1915 cgc->cmd[7] = s->type;
1916 cgc->cmd[8] = size >> 8;
1917 cgc->cmd[9] = size & 0xff;
1918
1919 ret = cdo->generic_packet(cdi, cgc);
1920 if (ret)
1921 goto out;
1922
1923 s->manufact.len = buf[0] << 8 | buf[1];
1924 if (s->manufact.len < 0) {
1925 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1926 s->manufact.len);
1927 ret = -EIO;
1928 } else {
1929 if (s->manufact.len > 2048) {
1930 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1931 s->manufact.len);
1932 s->manufact.len = 2048;
1933 }
1934 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1935 }
1936
1937out:
1938 kfree(buf);
1939 return ret;
1940}
1941
1942static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1943 struct packet_command *cgc)
1944{
1945 switch (s->type) {
1946 case DVD_STRUCT_PHYSICAL:
1947 return dvd_read_physical(cdi, s, cgc);
1948
1949 case DVD_STRUCT_COPYRIGHT:
1950 return dvd_read_copyright(cdi, s, cgc);
1951
1952 case DVD_STRUCT_DISCKEY:
1953 return dvd_read_disckey(cdi, s, cgc);
1954
1955 case DVD_STRUCT_BCA:
1956 return dvd_read_bca(cdi, s, cgc);
1957
1958 case DVD_STRUCT_MANUFACT:
1959 return dvd_read_manufact(cdi, s, cgc);
1960
1961 default:
1962 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1963 s->type);
1964 return -EINVAL;
1965 }
1966}
1967
1968int cdrom_mode_sense(struct cdrom_device_info *cdi,
1969 struct packet_command *cgc,
1970 int page_code, int page_control)
1971{
1972 const struct cdrom_device_ops *cdo = cdi->ops;
1973
1974 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1975
1976 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1977 cgc->cmd[2] = page_code | (page_control << 6);
1978 cgc->cmd[7] = cgc->buflen >> 8;
1979 cgc->cmd[8] = cgc->buflen & 0xff;
1980 cgc->data_direction = CGC_DATA_READ;
1981 return cdo->generic_packet(cdi, cgc);
1982}
1983EXPORT_SYMBOL(cdrom_mode_sense);
1984
1985int cdrom_mode_select(struct cdrom_device_info *cdi,
1986 struct packet_command *cgc)
1987{
1988 const struct cdrom_device_ops *cdo = cdi->ops;
1989
1990 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1991 memset(cgc->buffer, 0, 2);
1992 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1993 cgc->cmd[1] = 0x10; /* PF */
1994 cgc->cmd[7] = cgc->buflen >> 8;
1995 cgc->cmd[8] = cgc->buflen & 0xff;
1996 cgc->data_direction = CGC_DATA_WRITE;
1997 return cdo->generic_packet(cdi, cgc);
1998}
1999EXPORT_SYMBOL(cdrom_mode_select);
2000
2001static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2002 struct cdrom_subchnl *subchnl, int mcn)
2003{
2004 const struct cdrom_device_ops *cdo = cdi->ops;
2005 struct packet_command cgc;
2006 char buffer[32];
2007 int ret;
2008
2009 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2010 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2011 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2012 cgc.cmd[2] = 0x40; /* request subQ data */
2013 cgc.cmd[3] = mcn ? 2 : 1;
2014 cgc.cmd[8] = 16;
2015
2016 if ((ret = cdo->generic_packet(cdi, &cgc)))
2017 return ret;
2018
2019 subchnl->cdsc_audiostatus = cgc.buffer[1];
2020 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2021 subchnl->cdsc_trk = cgc.buffer[6];
2022 subchnl->cdsc_ind = cgc.buffer[7];
2023
2024 if (subchnl->cdsc_format == CDROM_LBA) {
2025 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2026 (cgc.buffer[9] << 16) |
2027 (cgc.buffer[10] << 8) |
2028 (cgc.buffer[11]));
2029 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2030 (cgc.buffer[13] << 16) |
2031 (cgc.buffer[14] << 8) |
2032 (cgc.buffer[15]));
2033 } else {
2034 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2035 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2036 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2037 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2038 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2039 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2040 }
2041
2042 return 0;
2043}
2044
2045/*
2046 * Specific READ_10 interface
2047 */
2048static int cdrom_read_cd(struct cdrom_device_info *cdi,
2049 struct packet_command *cgc, int lba,
2050 int blocksize, int nblocks)
2051{
2052 const struct cdrom_device_ops *cdo = cdi->ops;
2053
2054 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2055 cgc->cmd[0] = GPCMD_READ_10;
2056 cgc->cmd[2] = (lba >> 24) & 0xff;
2057 cgc->cmd[3] = (lba >> 16) & 0xff;
2058 cgc->cmd[4] = (lba >> 8) & 0xff;
2059 cgc->cmd[5] = lba & 0xff;
2060 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2061 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2062 cgc->cmd[8] = nblocks & 0xff;
2063 cgc->buflen = blocksize * nblocks;
2064 return cdo->generic_packet(cdi, cgc);
2065}
2066
2067/* very generic interface for reading the various types of blocks */
2068static int cdrom_read_block(struct cdrom_device_info *cdi,
2069 struct packet_command *cgc,
2070 int lba, int nblocks, int format, int blksize)
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_CD;
2076 /* expected sector size - cdda,mode1,etc. */
2077 cgc->cmd[1] = format << 2;
2078 /* starting address */
2079 cgc->cmd[2] = (lba >> 24) & 0xff;
2080 cgc->cmd[3] = (lba >> 16) & 0xff;
2081 cgc->cmd[4] = (lba >> 8) & 0xff;
2082 cgc->cmd[5] = lba & 0xff;
2083 /* number of blocks */
2084 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2085 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2086 cgc->cmd[8] = nblocks & 0xff;
2087 cgc->buflen = blksize * nblocks;
2088
2089 /* set the header info returned */
2090 switch (blksize) {
2091 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2092 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2093 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2094 default : cgc->cmd[9] = 0x10;
2095 }
2096
2097 return cdo->generic_packet(cdi, cgc);
2098}
2099
2100static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2101 int lba, int nframes)
2102{
2103 struct packet_command cgc;
2104 int ret = 0;
2105 int nr;
2106
2107 cdi->last_sense = 0;
2108
2109 memset(&cgc, 0, sizeof(cgc));
2110
2111 /*
2112 * start with will ra.nframes size, back down if alloc fails
2113 */
2114 nr = nframes;
2115 do {
2116 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL);
2117 if (cgc.buffer)
2118 break;
2119
2120 nr >>= 1;
2121 } while (nr);
2122
2123 if (!nr)
2124 return -ENOMEM;
2125
2126 cgc.data_direction = CGC_DATA_READ;
2127 while (nframes > 0) {
2128 if (nr > nframes)
2129 nr = nframes;
2130
2131 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2132 if (ret)
2133 break;
2134 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2135 ret = -EFAULT;
2136 break;
2137 }
2138 ubuf += CD_FRAMESIZE_RAW * nr;
2139 nframes -= nr;
2140 lba += nr;
2141 }
2142 kfree(cgc.buffer);
2143 return ret;
2144}
2145
2146static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2147 int lba, int nframes)
2148{
2149 int max_frames = (queue_max_sectors(cdi->disk->queue) << 9) /
2150 CD_FRAMESIZE_RAW;
2151 int nr, ret = 0;
2152
2153 cdi->last_sense = 0;
2154
2155 while (nframes) {
2156 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2157 nr = 1;
2158 else
2159 nr = min(nframes, max_frames);
2160
2161 ret = cdi->ops->read_cdda_bpc(cdi, ubuf, lba, nr,
2162 &cdi->last_sense);
2163 if (ret)
2164 break;
2165
2166 nframes -= nr;
2167 lba += nr;
2168 ubuf += (nr * CD_FRAMESIZE_RAW);
2169 }
2170
2171 return ret;
2172}
2173
2174static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2175 int lba, int nframes)
2176{
2177 int ret;
2178
2179 if (cdi->cdda_method == CDDA_OLD)
2180 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2181
2182retry:
2183 /*
2184 * for anything else than success and io error, we need to retry
2185 */
2186 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2187 if (!ret || ret != -EIO)
2188 return ret;
2189
2190 /*
2191 * I've seen drives get sense 4/8/3 udma crc errors on multi
2192 * frame dma, so drop to single frame dma if we need to
2193 */
2194 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2195 pr_info("dropping to single frame dma\n");
2196 cdi->cdda_method = CDDA_BPC_SINGLE;
2197 goto retry;
2198 }
2199
2200 /*
2201 * so we have an io error of some sort with multi frame dma. if the
2202 * condition wasn't a hardware error
2203 * problems, not for any error
2204 */
2205 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2206 return ret;
2207
2208 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2209 cdi->cdda_method = CDDA_OLD;
2210 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2211}
2212
2213int cdrom_multisession(struct cdrom_device_info *cdi,
2214 struct cdrom_multisession *info)
2215{
2216 u8 requested_format;
2217 int ret;
2218
2219 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2220 return -ENOSYS;
2221
2222 requested_format = info->addr_format;
2223 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2224 return -EINVAL;
2225 info->addr_format = CDROM_LBA;
2226
2227 ret = cdi->ops->get_last_session(cdi, info);
2228 if (!ret)
2229 sanitize_format(&info->addr, &info->addr_format,
2230 requested_format);
2231 return ret;
2232}
2233EXPORT_SYMBOL_GPL(cdrom_multisession);
2234
2235static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2236 void __user *argp)
2237{
2238 struct cdrom_multisession info;
2239 int ret;
2240
2241 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2242
2243 if (copy_from_user(&info, argp, sizeof(info)))
2244 return -EFAULT;
2245 ret = cdrom_multisession(cdi, &info);
2246 if (ret)
2247 return ret;
2248 if (copy_to_user(argp, &info, sizeof(info)))
2249 return -EFAULT;
2250
2251 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2252 return ret;
2253}
2254
2255static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2256{
2257 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2258
2259 if (!CDROM_CAN(CDC_OPEN_TRAY))
2260 return -ENOSYS;
2261 if (cdi->use_count != 1 || cdi->keeplocked)
2262 return -EBUSY;
2263 if (CDROM_CAN(CDC_LOCK)) {
2264 int ret = cdi->ops->lock_door(cdi, 0);
2265 if (ret)
2266 return ret;
2267 }
2268
2269 return cdi->ops->tray_move(cdi, 1);
2270}
2271
2272static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2273{
2274 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2275
2276 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2277 return -ENOSYS;
2278 return cdi->ops->tray_move(cdi, 0);
2279}
2280
2281static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2282 unsigned long arg)
2283{
2284 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2285
2286 if (!CDROM_CAN(CDC_OPEN_TRAY))
2287 return -ENOSYS;
2288 if (cdi->keeplocked)
2289 return -EBUSY;
2290
2291 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2292 if (arg)
2293 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2294 return 0;
2295}
2296
2297static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2298 unsigned long arg)
2299{
2300 struct cdrom_changer_info *info;
2301 int ret;
2302
2303 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2304
2305 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2306 return -ENOSYS;
2307
2308 /* cannot select disc or select current disc */
2309 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2310 return media_changed(cdi, 1);
2311
2312 if (arg >= cdi->capacity)
2313 return -EINVAL;
2314
2315 /* Prevent arg from speculatively bypassing the length check */
2316 barrier_nospec();
2317
2318 info = kmalloc(sizeof(*info), GFP_KERNEL);
2319 if (!info)
2320 return -ENOMEM;
2321
2322 ret = cdrom_read_mech_status(cdi, info);
2323 if (!ret)
2324 ret = info->slots[arg].change;
2325 kfree(info);
2326 return ret;
2327}
2328
2329/*
2330 * Media change detection with timing information.
2331 *
2332 * arg is a pointer to a cdrom_timed_media_change_info struct.
2333 * arg->last_media_change may be set by calling code to signal
2334 * the timestamp (in ms) of the last known media change (by the caller).
2335 * Upon successful return, ioctl call will set arg->last_media_change
2336 * to the latest media change timestamp known by the kernel/driver
2337 * and set arg->has_changed to 1 if that timestamp is more recent
2338 * than the timestamp set by the caller.
2339 */
2340static int cdrom_ioctl_timed_media_change(struct cdrom_device_info *cdi,
2341 unsigned long arg)
2342{
2343 int ret;
2344 struct cdrom_timed_media_change_info __user *info;
2345 struct cdrom_timed_media_change_info tmp_info;
2346
2347 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2348 return -ENOSYS;
2349
2350 info = (struct cdrom_timed_media_change_info __user *)arg;
2351 cd_dbg(CD_DO_IOCTL, "entering CDROM_TIMED_MEDIA_CHANGE\n");
2352
2353 ret = cdrom_ioctl_media_changed(cdi, CDSL_CURRENT);
2354 if (ret < 0)
2355 return ret;
2356
2357 if (copy_from_user(&tmp_info, info, sizeof(tmp_info)) != 0)
2358 return -EFAULT;
2359
2360 tmp_info.media_flags = 0;
2361 if (tmp_info.last_media_change - cdi->last_media_change_ms < 0)
2362 tmp_info.media_flags |= MEDIA_CHANGED_FLAG;
2363
2364 tmp_info.last_media_change = cdi->last_media_change_ms;
2365
2366 if (copy_to_user(info, &tmp_info, sizeof(*info)) != 0)
2367 return -EFAULT;
2368
2369 return 0;
2370}
2371
2372static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2373 unsigned long arg)
2374{
2375 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2376
2377 /*
2378 * Options need to be in sync with capability.
2379 * Too late for that, so we have to check each one separately.
2380 */
2381 switch (arg) {
2382 case CDO_USE_FFLAGS:
2383 case CDO_CHECK_TYPE:
2384 break;
2385 case CDO_LOCK:
2386 if (!CDROM_CAN(CDC_LOCK))
2387 return -ENOSYS;
2388 break;
2389 case 0:
2390 return cdi->options;
2391 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2392 default:
2393 if (!CDROM_CAN(arg))
2394 return -ENOSYS;
2395 }
2396 cdi->options |= (int) arg;
2397 return cdi->options;
2398}
2399
2400static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2401 unsigned long arg)
2402{
2403 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2404
2405 cdi->options &= ~(int) arg;
2406 return cdi->options;
2407}
2408
2409static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2410 unsigned long arg)
2411{
2412 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2413
2414 if (!CDROM_CAN(CDC_SELECT_SPEED))
2415 return -ENOSYS;
2416 return cdi->ops->select_speed(cdi, arg);
2417}
2418
2419static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2420 unsigned long arg)
2421{
2422 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2423
2424 if (!CDROM_CAN(CDC_SELECT_DISC))
2425 return -ENOSYS;
2426
2427 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2428 if (arg >= cdi->capacity)
2429 return -EINVAL;
2430 }
2431
2432 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2433 return cdrom_select_disc(cdi, arg);
2434}
2435
2436static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2437 struct block_device *bdev)
2438{
2439 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2440
2441 if (!capable(CAP_SYS_ADMIN))
2442 return -EACCES;
2443 if (!CDROM_CAN(CDC_RESET))
2444 return -ENOSYS;
2445 invalidate_bdev(bdev);
2446 return cdi->ops->reset(cdi);
2447}
2448
2449static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2450 unsigned long arg)
2451{
2452 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2453
2454 if (!CDROM_CAN(CDC_LOCK))
2455 return -EDRIVE_CANT_DO_THIS;
2456
2457 cdi->keeplocked = arg ? 1 : 0;
2458
2459 /*
2460 * Don't unlock the door on multiple opens by default, but allow
2461 * root to do so.
2462 */
2463 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2464 return -EBUSY;
2465 return cdi->ops->lock_door(cdi, arg);
2466}
2467
2468static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2469 unsigned long arg)
2470{
2471 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2472
2473 if (!capable(CAP_SYS_ADMIN))
2474 return -EACCES;
2475 debug = arg ? 1 : 0;
2476 return debug;
2477}
2478
2479static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2480{
2481 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2482 return (cdi->ops->capability & ~cdi->mask);
2483}
2484
2485/*
2486 * The following function is implemented, although very few audio
2487 * discs give Universal Product Code information, which should just be
2488 * the Medium Catalog Number on the box. Note, that the way the code
2489 * is written on the CD is /not/ uniform across all discs!
2490 */
2491static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2492 void __user *argp)
2493{
2494 struct cdrom_mcn mcn;
2495 int ret;
2496
2497 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2498
2499 if (!(cdi->ops->capability & CDC_MCN))
2500 return -ENOSYS;
2501 ret = cdi->ops->get_mcn(cdi, &mcn);
2502 if (ret)
2503 return ret;
2504
2505 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2506 return -EFAULT;
2507 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2508 return 0;
2509}
2510
2511static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2512 unsigned long arg)
2513{
2514 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2515
2516 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2517 return -ENOSYS;
2518 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2519 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2520 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2521 if (arg >= cdi->capacity)
2522 return -EINVAL;
2523 return cdrom_slot_status(cdi, arg);
2524}
2525
2526/*
2527 * Ok, this is where problems start. The current interface for the
2528 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2529 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2530 * is often the case, it is also very common for CDs to have some tracks
2531 * with data, and some tracks with audio. Just because I feel like it,
2532 * I declare the following to be the best way to cope. If the CD has ANY
2533 * data tracks on it, it will be returned as a data CD. If it has any XA
2534 * tracks, I will return it as that. Now I could simplify this interface
2535 * by combining these returns with the above, but this more clearly
2536 * demonstrates the problem with the current interface. Too bad this
2537 * wasn't designed to use bitmasks... -Erik
2538 *
2539 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2540 * User level programmers might feel the ioctl is not very useful.
2541 * ---david
2542 */
2543static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2544{
2545 tracktype tracks;
2546
2547 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2548
2549 cdrom_count_tracks(cdi, &tracks);
2550 if (tracks.error)
2551 return tracks.error;
2552
2553 /* Policy mode on */
2554 if (tracks.audio > 0) {
2555 if (!tracks.data && !tracks.cdi && !tracks.xa)
2556 return CDS_AUDIO;
2557 else
2558 return CDS_MIXED;
2559 }
2560
2561 if (tracks.cdi > 0)
2562 return CDS_XA_2_2;
2563 if (tracks.xa > 0)
2564 return CDS_XA_2_1;
2565 if (tracks.data > 0)
2566 return CDS_DATA_1;
2567 /* Policy mode off */
2568
2569 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2570 return CDS_NO_INFO;
2571}
2572
2573static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2574{
2575 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2576 return cdi->capacity;
2577}
2578
2579static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2580 void __user *argp)
2581{
2582 struct cdrom_subchnl q;
2583 u8 requested, back;
2584 int ret;
2585
2586 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2587
2588 if (copy_from_user(&q, argp, sizeof(q)))
2589 return -EFAULT;
2590
2591 requested = q.cdsc_format;
2592 if (requested != CDROM_MSF && requested != CDROM_LBA)
2593 return -EINVAL;
2594 q.cdsc_format = CDROM_MSF;
2595
2596 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2597 if (ret)
2598 return ret;
2599
2600 back = q.cdsc_format; /* local copy */
2601 sanitize_format(&q.cdsc_absaddr, &back, requested);
2602 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2603
2604 if (copy_to_user(argp, &q, sizeof(q)))
2605 return -EFAULT;
2606 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2607 return 0;
2608}
2609
2610static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2611 void __user *argp)
2612{
2613 struct cdrom_tochdr header;
2614 int ret;
2615
2616 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2617
2618 if (copy_from_user(&header, argp, sizeof(header)))
2619 return -EFAULT;
2620
2621 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2622 if (ret)
2623 return ret;
2624
2625 if (copy_to_user(argp, &header, sizeof(header)))
2626 return -EFAULT;
2627 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2628 return 0;
2629}
2630
2631int cdrom_read_tocentry(struct cdrom_device_info *cdi,
2632 struct cdrom_tocentry *entry)
2633{
2634 u8 requested_format = entry->cdte_format;
2635 int ret;
2636
2637 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2638 return -EINVAL;
2639
2640 /* make interface to low-level uniform */
2641 entry->cdte_format = CDROM_MSF;
2642 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, entry);
2643 if (!ret)
2644 sanitize_format(&entry->cdte_addr, &entry->cdte_format,
2645 requested_format);
2646 return ret;
2647}
2648EXPORT_SYMBOL_GPL(cdrom_read_tocentry);
2649
2650static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2651 void __user *argp)
2652{
2653 struct cdrom_tocentry entry;
2654 int ret;
2655
2656 if (copy_from_user(&entry, argp, sizeof(entry)))
2657 return -EFAULT;
2658 ret = cdrom_read_tocentry(cdi, &entry);
2659 if (!ret && copy_to_user(argp, &entry, sizeof(entry)))
2660 return -EFAULT;
2661 return ret;
2662}
2663
2664static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2665 void __user *argp)
2666{
2667 struct cdrom_msf msf;
2668
2669 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2670
2671 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2672 return -ENOSYS;
2673 if (copy_from_user(&msf, argp, sizeof(msf)))
2674 return -EFAULT;
2675 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2676}
2677
2678static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2679 void __user *argp)
2680{
2681 struct cdrom_ti ti;
2682 int ret;
2683
2684 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2685
2686 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2687 return -ENOSYS;
2688 if (copy_from_user(&ti, argp, sizeof(ti)))
2689 return -EFAULT;
2690
2691 ret = check_for_audio_disc(cdi, cdi->ops);
2692 if (ret)
2693 return ret;
2694 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2695}
2696static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2697 void __user *argp)
2698{
2699 struct cdrom_volctrl volume;
2700
2701 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2702
2703 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2704 return -ENOSYS;
2705 if (copy_from_user(&volume, argp, sizeof(volume)))
2706 return -EFAULT;
2707 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2708}
2709
2710static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2711 void __user *argp)
2712{
2713 struct cdrom_volctrl volume;
2714 int ret;
2715
2716 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2717
2718 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2719 return -ENOSYS;
2720
2721 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2722 if (ret)
2723 return ret;
2724
2725 if (copy_to_user(argp, &volume, sizeof(volume)))
2726 return -EFAULT;
2727 return 0;
2728}
2729
2730static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2731 unsigned int cmd)
2732{
2733 int ret;
2734
2735 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2736
2737 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2738 return -ENOSYS;
2739 ret = check_for_audio_disc(cdi, cdi->ops);
2740 if (ret)
2741 return ret;
2742 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2743}
2744
2745/*
2746 * Required when we need to use READ_10 to issue other than 2048 block
2747 * reads
2748 */
2749static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2750{
2751 const struct cdrom_device_ops *cdo = cdi->ops;
2752 struct packet_command cgc;
2753 struct modesel_head mh;
2754
2755 memset(&mh, 0, sizeof(mh));
2756 mh.block_desc_length = 0x08;
2757 mh.block_length_med = (size >> 8) & 0xff;
2758 mh.block_length_lo = size & 0xff;
2759
2760 memset(&cgc, 0, sizeof(cgc));
2761 cgc.cmd[0] = 0x15;
2762 cgc.cmd[1] = 1 << 4;
2763 cgc.cmd[4] = 12;
2764 cgc.buflen = sizeof(mh);
2765 cgc.buffer = (char *) &mh;
2766 cgc.data_direction = CGC_DATA_WRITE;
2767 mh.block_desc_length = 0x08;
2768 mh.block_length_med = (size >> 8) & 0xff;
2769 mh.block_length_lo = size & 0xff;
2770
2771 return cdo->generic_packet(cdi, &cgc);
2772}
2773
2774static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2775 __u16 track, __u8 type, track_information *ti)
2776{
2777 const struct cdrom_device_ops *cdo = cdi->ops;
2778 struct packet_command cgc;
2779 int ret, buflen;
2780
2781 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2782 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2783 cgc.cmd[1] = type & 3;
2784 cgc.cmd[4] = (track & 0xff00) >> 8;
2785 cgc.cmd[5] = track & 0xff;
2786 cgc.cmd[8] = 8;
2787 cgc.quiet = 1;
2788
2789 ret = cdo->generic_packet(cdi, &cgc);
2790 if (ret)
2791 return ret;
2792
2793 buflen = be16_to_cpu(ti->track_information_length) +
2794 sizeof(ti->track_information_length);
2795
2796 if (buflen > sizeof(track_information))
2797 buflen = sizeof(track_information);
2798
2799 cgc.cmd[8] = cgc.buflen = buflen;
2800 ret = cdo->generic_packet(cdi, &cgc);
2801 if (ret)
2802 return ret;
2803
2804 /* return actual fill size */
2805 return buflen;
2806}
2807
2808/* return the last written block on the CD-R media. this is for the udf
2809 file system. */
2810int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2811{
2812 struct cdrom_tocentry toc;
2813 disc_information di;
2814 track_information ti;
2815 __u32 last_track;
2816 int ret = -1, ti_size;
2817
2818 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2819 goto use_toc;
2820
2821 ret = cdrom_get_disc_info(cdi, &di);
2822 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2823 + sizeof(di.last_track_lsb)))
2824 goto use_toc;
2825
2826 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2827 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2828 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2829 if (ti_size < (int)offsetof(typeof(ti), track_start))
2830 goto use_toc;
2831
2832 /* if this track is blank, try the previous. */
2833 if (ti.blank) {
2834 if (last_track == 1)
2835 goto use_toc;
2836 last_track--;
2837 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2838 }
2839
2840 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2841 + sizeof(ti.track_size)))
2842 goto use_toc;
2843
2844 /* if last recorded field is valid, return it. */
2845 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2846 + sizeof(ti.last_rec_address))) {
2847 *last_written = be32_to_cpu(ti.last_rec_address);
2848 } else {
2849 /* make it up instead */
2850 *last_written = be32_to_cpu(ti.track_start) +
2851 be32_to_cpu(ti.track_size);
2852 if (ti.free_blocks)
2853 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2854 }
2855 return 0;
2856
2857 /* this is where we end up if the drive either can't do a
2858 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2859 it doesn't give enough information or fails. then we return
2860 the toc contents. */
2861use_toc:
2862 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2863 return -ENOSYS;
2864
2865 toc.cdte_format = CDROM_MSF;
2866 toc.cdte_track = CDROM_LEADOUT;
2867 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2868 return ret;
2869 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2870 *last_written = toc.cdte_addr.lba;
2871 return 0;
2872}
2873EXPORT_SYMBOL(cdrom_get_last_written);
2874
2875/* return the next writable block. also for udf file system. */
2876static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2877 long *next_writable)
2878{
2879 disc_information di;
2880 track_information ti;
2881 __u16 last_track;
2882 int ret, ti_size;
2883
2884 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2885 goto use_last_written;
2886
2887 ret = cdrom_get_disc_info(cdi, &di);
2888 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2889 + sizeof(di.last_track_lsb))
2890 goto use_last_written;
2891
2892 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2893 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2894 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2895 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2896 goto use_last_written;
2897
2898 /* if this track is blank, try the previous. */
2899 if (ti.blank) {
2900 if (last_track == 1)
2901 goto use_last_written;
2902 last_track--;
2903 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2904 if (ti_size < 0)
2905 goto use_last_written;
2906 }
2907
2908 /* if next recordable address field is valid, use it. */
2909 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2910 + sizeof(ti.next_writable)) {
2911 *next_writable = be32_to_cpu(ti.next_writable);
2912 return 0;
2913 }
2914
2915use_last_written:
2916 ret = cdrom_get_last_written(cdi, next_writable);
2917 if (ret) {
2918 *next_writable = 0;
2919 return ret;
2920 } else {
2921 *next_writable += 7;
2922 return 0;
2923 }
2924}
2925
2926static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2927 void __user *arg,
2928 struct packet_command *cgc,
2929 int cmd)
2930{
2931 struct scsi_sense_hdr sshdr;
2932 struct cdrom_msf msf;
2933 int blocksize = 0, format = 0, lba;
2934 int ret;
2935
2936 switch (cmd) {
2937 case CDROMREADRAW:
2938 blocksize = CD_FRAMESIZE_RAW;
2939 break;
2940 case CDROMREADMODE1:
2941 blocksize = CD_FRAMESIZE;
2942 format = 2;
2943 break;
2944 case CDROMREADMODE2:
2945 blocksize = CD_FRAMESIZE_RAW0;
2946 break;
2947 }
2948 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2949 return -EFAULT;
2950 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2951 /* FIXME: we need upper bound checking, too!! */
2952 if (lba < 0)
2953 return -EINVAL;
2954
2955 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2956 if (cgc->buffer == NULL)
2957 return -ENOMEM;
2958
2959 memset(&sshdr, 0, sizeof(sshdr));
2960 cgc->sshdr = &sshdr;
2961 cgc->data_direction = CGC_DATA_READ;
2962 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2963 if (ret && sshdr.sense_key == 0x05 &&
2964 sshdr.asc == 0x20 &&
2965 sshdr.ascq == 0x00) {
2966 /*
2967 * SCSI-II devices are not required to support
2968 * READ_CD, so let's try switching block size
2969 */
2970 if (blocksize != CD_FRAMESIZE) {
2971 ret = cdrom_switch_blocksize(cdi, blocksize);
2972 if (ret)
2973 goto out;
2974 }
2975 cgc->sshdr = NULL;
2976 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2977 if (blocksize != CD_FRAMESIZE)
2978 ret |= cdrom_switch_blocksize(cdi, CD_FRAMESIZE);
2979 }
2980 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2981 ret = -EFAULT;
2982out:
2983 kfree(cgc->buffer);
2984 return ret;
2985}
2986
2987static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2988 void __user *arg)
2989{
2990 struct cdrom_read_audio ra;
2991 int lba;
2992
2993#ifdef CONFIG_COMPAT
2994 if (in_compat_syscall()) {
2995 struct compat_cdrom_read_audio {
2996 union cdrom_addr addr;
2997 u8 addr_format;
2998 compat_int_t nframes;
2999 compat_caddr_t buf;
3000 } ra32;
3001
3002 if (copy_from_user(&ra32, arg, sizeof(ra32)))
3003 return -EFAULT;
3004
3005 ra = (struct cdrom_read_audio) {
3006 .addr = ra32.addr,
3007 .addr_format = ra32.addr_format,
3008 .nframes = ra32.nframes,
3009 .buf = compat_ptr(ra32.buf),
3010 };
3011 } else
3012#endif
3013 {
3014 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3015 sizeof(ra)))
3016 return -EFAULT;
3017 }
3018
3019 if (ra.addr_format == CDROM_MSF)
3020 lba = msf_to_lba(ra.addr.msf.minute,
3021 ra.addr.msf.second,
3022 ra.addr.msf.frame);
3023 else if (ra.addr_format == CDROM_LBA)
3024 lba = ra.addr.lba;
3025 else
3026 return -EINVAL;
3027
3028 /* FIXME: we need upper bound checking, too!! */
3029 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3030 return -EINVAL;
3031
3032 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3033}
3034
3035static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3036 void __user *arg)
3037{
3038 int ret;
3039 struct cdrom_subchnl q;
3040 u_char requested, back;
3041 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3042 return -EFAULT;
3043 requested = q.cdsc_format;
3044 if (!((requested == CDROM_MSF) ||
3045 (requested == CDROM_LBA)))
3046 return -EINVAL;
3047
3048 ret = cdrom_read_subchannel(cdi, &q, 0);
3049 if (ret)
3050 return ret;
3051 back = q.cdsc_format; /* local copy */
3052 sanitize_format(&q.cdsc_absaddr, &back, requested);
3053 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3054 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3055 return -EFAULT;
3056 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3057 return 0;
3058}
3059
3060static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3061 void __user *arg,
3062 struct packet_command *cgc)
3063{
3064 const struct cdrom_device_ops *cdo = cdi->ops;
3065 struct cdrom_msf msf;
3066 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3067 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3068 return -EFAULT;
3069 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3070 cgc->cmd[3] = msf.cdmsf_min0;
3071 cgc->cmd[4] = msf.cdmsf_sec0;
3072 cgc->cmd[5] = msf.cdmsf_frame0;
3073 cgc->cmd[6] = msf.cdmsf_min1;
3074 cgc->cmd[7] = msf.cdmsf_sec1;
3075 cgc->cmd[8] = msf.cdmsf_frame1;
3076 cgc->data_direction = CGC_DATA_NONE;
3077 return cdo->generic_packet(cdi, cgc);
3078}
3079
3080static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3081 void __user *arg,
3082 struct packet_command *cgc)
3083{
3084 const struct cdrom_device_ops *cdo = cdi->ops;
3085 struct cdrom_blk blk;
3086 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3087 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3088 return -EFAULT;
3089 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3090 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3091 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3092 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3093 cgc->cmd[5] = blk.from & 0xff;
3094 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3095 cgc->cmd[8] = blk.len & 0xff;
3096 cgc->data_direction = CGC_DATA_NONE;
3097 return cdo->generic_packet(cdi, cgc);
3098}
3099
3100static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3101 void __user *arg,
3102 struct packet_command *cgc,
3103 unsigned int cmd)
3104{
3105 struct cdrom_volctrl volctrl;
3106 unsigned char buffer[32];
3107 char mask[sizeof(buffer)];
3108 unsigned short offset;
3109 int ret;
3110
3111 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3112
3113 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3114 sizeof(volctrl)))
3115 return -EFAULT;
3116
3117 cgc->buffer = buffer;
3118 cgc->buflen = 24;
3119 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3120 if (ret)
3121 return ret;
3122
3123 /* originally the code depended on buffer[1] to determine
3124 how much data is available for transfer. buffer[1] is
3125 unfortunately ambigious and the only reliable way seem
3126 to be to simply skip over the block descriptor... */
3127 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3128
3129 if (offset + 16 > sizeof(buffer))
3130 return -E2BIG;
3131
3132 if (offset + 16 > cgc->buflen) {
3133 cgc->buflen = offset + 16;
3134 ret = cdrom_mode_sense(cdi, cgc,
3135 GPMODE_AUDIO_CTL_PAGE, 0);
3136 if (ret)
3137 return ret;
3138 }
3139
3140 /* sanity check */
3141 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3142 buffer[offset + 1] < 14)
3143 return -EINVAL;
3144
3145 /* now we have the current volume settings. if it was only
3146 a CDROMVOLREAD, return these values */
3147 if (cmd == CDROMVOLREAD) {
3148 volctrl.channel0 = buffer[offset+9];
3149 volctrl.channel1 = buffer[offset+11];
3150 volctrl.channel2 = buffer[offset+13];
3151 volctrl.channel3 = buffer[offset+15];
3152 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3153 sizeof(volctrl)))
3154 return -EFAULT;
3155 return 0;
3156 }
3157
3158 /* get the volume mask */
3159 cgc->buffer = mask;
3160 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3161 if (ret)
3162 return ret;
3163
3164 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3165 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3166 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3167 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3168
3169 /* set volume */
3170 cgc->buffer = buffer + offset - 8;
3171 memset(cgc->buffer, 0, 8);
3172 return cdrom_mode_select(cdi, cgc);
3173}
3174
3175static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3176 struct packet_command *cgc,
3177 int cmd)
3178{
3179 const struct cdrom_device_ops *cdo = cdi->ops;
3180 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3181 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3182 cgc->cmd[1] = 1;
3183 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3184 cgc->data_direction = CGC_DATA_NONE;
3185 return cdo->generic_packet(cdi, cgc);
3186}
3187
3188static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3189 struct packet_command *cgc,
3190 int cmd)
3191{
3192 const struct cdrom_device_ops *cdo = cdi->ops;
3193 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3194 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3195 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3196 cgc->data_direction = CGC_DATA_NONE;
3197 return cdo->generic_packet(cdi, cgc);
3198}
3199
3200static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3201 void __user *arg,
3202 struct packet_command *cgc)
3203{
3204 int ret;
3205 dvd_struct *s;
3206 int size = sizeof(dvd_struct);
3207
3208 if (!CDROM_CAN(CDC_DVD))
3209 return -ENOSYS;
3210
3211 s = memdup_user(arg, size);
3212 if (IS_ERR(s))
3213 return PTR_ERR(s);
3214
3215 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3216
3217 ret = dvd_read_struct(cdi, s, cgc);
3218 if (ret)
3219 goto out;
3220
3221 if (copy_to_user(arg, s, size))
3222 ret = -EFAULT;
3223out:
3224 kfree(s);
3225 return ret;
3226}
3227
3228static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3229 void __user *arg)
3230{
3231 int ret;
3232 dvd_authinfo ai;
3233 if (!CDROM_CAN(CDC_DVD))
3234 return -ENOSYS;
3235 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3236 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3237 return -EFAULT;
3238 ret = dvd_do_auth(cdi, &ai);
3239 if (ret)
3240 return ret;
3241 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3242 return -EFAULT;
3243 return 0;
3244}
3245
3246static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3247 void __user *arg)
3248{
3249 int ret;
3250 long next = 0;
3251 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3252 ret = cdrom_get_next_writable(cdi, &next);
3253 if (ret)
3254 return ret;
3255 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3256 return -EFAULT;
3257 return 0;
3258}
3259
3260static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3261 void __user *arg)
3262{
3263 int ret;
3264 long last = 0;
3265 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3266 ret = cdrom_get_last_written(cdi, &last);
3267 if (ret)
3268 return ret;
3269 if (in_compat_syscall())
3270 return put_user(last, (__s32 __user *)arg);
3271
3272 return put_user(last, (long __user *)arg);
3273}
3274
3275static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3276 unsigned long arg)
3277{
3278 struct packet_command cgc;
3279 void __user *userptr = (void __user *)arg;
3280
3281 memset(&cgc, 0, sizeof(cgc));
3282
3283 /* build a unified command and queue it through
3284 cdo->generic_packet() */
3285 switch (cmd) {
3286 case CDROMREADRAW:
3287 case CDROMREADMODE1:
3288 case CDROMREADMODE2:
3289 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3290 case CDROMREADAUDIO:
3291 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3292 case CDROMSUBCHNL:
3293 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3294 case CDROMPLAYMSF:
3295 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3296 case CDROMPLAYBLK:
3297 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3298 case CDROMVOLCTRL:
3299 case CDROMVOLREAD:
3300 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3301 case CDROMSTART:
3302 case CDROMSTOP:
3303 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3304 case CDROMPAUSE:
3305 case CDROMRESUME:
3306 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3307 case DVD_READ_STRUCT:
3308 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3309 case DVD_AUTH:
3310 return mmc_ioctl_dvd_auth(cdi, userptr);
3311 case CDROM_NEXT_WRITABLE:
3312 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3313 case CDROM_LAST_WRITTEN:
3314 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3315 }
3316
3317 return -ENOTTY;
3318}
3319
3320/*
3321 * Just about every imaginable ioctl is supported in the Uniform layer
3322 * these days.
3323 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3324 */
3325int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3326 unsigned int cmd, unsigned long arg)
3327{
3328 void __user *argp = (void __user *)arg;
3329 int ret;
3330
3331 switch (cmd) {
3332 case CDROMMULTISESSION:
3333 return cdrom_ioctl_multisession(cdi, argp);
3334 case CDROMEJECT:
3335 return cdrom_ioctl_eject(cdi);
3336 case CDROMCLOSETRAY:
3337 return cdrom_ioctl_closetray(cdi);
3338 case CDROMEJECT_SW:
3339 return cdrom_ioctl_eject_sw(cdi, arg);
3340 case CDROM_MEDIA_CHANGED:
3341 return cdrom_ioctl_media_changed(cdi, arg);
3342 case CDROM_TIMED_MEDIA_CHANGE:
3343 return cdrom_ioctl_timed_media_change(cdi, arg);
3344 case CDROM_SET_OPTIONS:
3345 return cdrom_ioctl_set_options(cdi, arg);
3346 case CDROM_CLEAR_OPTIONS:
3347 return cdrom_ioctl_clear_options(cdi, arg);
3348 case CDROM_SELECT_SPEED:
3349 return cdrom_ioctl_select_speed(cdi, arg);
3350 case CDROM_SELECT_DISC:
3351 return cdrom_ioctl_select_disc(cdi, arg);
3352 case CDROMRESET:
3353 return cdrom_ioctl_reset(cdi, bdev);
3354 case CDROM_LOCKDOOR:
3355 return cdrom_ioctl_lock_door(cdi, arg);
3356 case CDROM_DEBUG:
3357 return cdrom_ioctl_debug(cdi, arg);
3358 case CDROM_GET_CAPABILITY:
3359 return cdrom_ioctl_get_capability(cdi);
3360 case CDROM_GET_MCN:
3361 return cdrom_ioctl_get_mcn(cdi, argp);
3362 case CDROM_DRIVE_STATUS:
3363 return cdrom_ioctl_drive_status(cdi, arg);
3364 case CDROM_DISC_STATUS:
3365 return cdrom_ioctl_disc_status(cdi);
3366 case CDROM_CHANGER_NSLOTS:
3367 return cdrom_ioctl_changer_nslots(cdi);
3368 }
3369
3370 /*
3371 * Use the ioctls that are implemented through the generic_packet()
3372 * interface. this may look at bit funny, but if -ENOTTY is
3373 * returned that particular ioctl is not implemented and we
3374 * let it go through the device specific ones.
3375 */
3376 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3377 ret = mmc_ioctl(cdi, cmd, arg);
3378 if (ret != -ENOTTY)
3379 return ret;
3380 }
3381
3382 /*
3383 * Note: most of the cd_dbg() calls are commented out here,
3384 * because they fill up the sys log when CD players poll
3385 * the drive.
3386 */
3387 switch (cmd) {
3388 case CDROMSUBCHNL:
3389 return cdrom_ioctl_get_subchnl(cdi, argp);
3390 case CDROMREADTOCHDR:
3391 return cdrom_ioctl_read_tochdr(cdi, argp);
3392 case CDROMREADTOCENTRY:
3393 return cdrom_ioctl_read_tocentry(cdi, argp);
3394 case CDROMPLAYMSF:
3395 return cdrom_ioctl_play_msf(cdi, argp);
3396 case CDROMPLAYTRKIND:
3397 return cdrom_ioctl_play_trkind(cdi, argp);
3398 case CDROMVOLCTRL:
3399 return cdrom_ioctl_volctrl(cdi, argp);
3400 case CDROMVOLREAD:
3401 return cdrom_ioctl_volread(cdi, argp);
3402 case CDROMSTART:
3403 case CDROMSTOP:
3404 case CDROMPAUSE:
3405 case CDROMRESUME:
3406 return cdrom_ioctl_audioctl(cdi, cmd);
3407 }
3408
3409 return -ENOSYS;
3410}
3411EXPORT_SYMBOL(cdrom_ioctl);
3412
3413#ifdef CONFIG_SYSCTL
3414
3415#define CDROM_STR_SIZE 1000
3416
3417static struct cdrom_sysctl_settings {
3418 char info[CDROM_STR_SIZE]; /* general info */
3419 int autoclose; /* close tray upon mount, etc */
3420 int autoeject; /* eject on umount */
3421 int debug; /* turn on debugging messages */
3422 int lock; /* lock the door on device open */
3423 int check; /* check media type */
3424} cdrom_sysctl_settings;
3425
3426enum cdrom_print_option {
3427 CTL_NAME,
3428 CTL_SPEED,
3429 CTL_SLOTS,
3430 CTL_CAPABILITY
3431};
3432
3433static int cdrom_print_info(const char *header, int val, char *info,
3434 int *pos, enum cdrom_print_option option)
3435{
3436 const int max_size = sizeof(cdrom_sysctl_settings.info);
3437 struct cdrom_device_info *cdi;
3438 int ret;
3439
3440 ret = scnprintf(info + *pos, max_size - *pos, header);
3441 if (!ret)
3442 return 1;
3443
3444 *pos += ret;
3445
3446 list_for_each_entry(cdi, &cdrom_list, list) {
3447 switch (option) {
3448 case CTL_NAME:
3449 ret = scnprintf(info + *pos, max_size - *pos,
3450 "\t%s", cdi->name);
3451 break;
3452 case CTL_SPEED:
3453 ret = scnprintf(info + *pos, max_size - *pos,
3454 "\t%d", cdi->speed);
3455 break;
3456 case CTL_SLOTS:
3457 ret = scnprintf(info + *pos, max_size - *pos,
3458 "\t%d", cdi->capacity);
3459 break;
3460 case CTL_CAPABILITY:
3461 ret = scnprintf(info + *pos, max_size - *pos,
3462 "\t%d", CDROM_CAN(val) != 0);
3463 break;
3464 default:
3465 pr_info("invalid option%d\n", option);
3466 return 1;
3467 }
3468 if (!ret)
3469 return 1;
3470 *pos += ret;
3471 }
3472
3473 return 0;
3474}
3475
3476static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3477 void *buffer, size_t *lenp, loff_t *ppos)
3478{
3479 int pos;
3480 char *info = cdrom_sysctl_settings.info;
3481 const int max_size = sizeof(cdrom_sysctl_settings.info);
3482
3483 if (!*lenp || (*ppos && !write)) {
3484 *lenp = 0;
3485 return 0;
3486 }
3487
3488 mutex_lock(&cdrom_mutex);
3489
3490 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3491
3492 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3493 goto done;
3494 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3495 goto done;
3496 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3497 goto done;
3498 if (cdrom_print_info("\nCan close tray:\t",
3499 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3500 goto done;
3501 if (cdrom_print_info("\nCan open tray:\t",
3502 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3503 goto done;
3504 if (cdrom_print_info("\nCan lock tray:\t",
3505 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3506 goto done;
3507 if (cdrom_print_info("\nCan change speed:",
3508 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3509 goto done;
3510 if (cdrom_print_info("\nCan select disk:",
3511 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3512 goto done;
3513 if (cdrom_print_info("\nCan read multisession:",
3514 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3515 goto done;
3516 if (cdrom_print_info("\nCan read MCN:\t",
3517 CDC_MCN, info, &pos, CTL_CAPABILITY))
3518 goto done;
3519 if (cdrom_print_info("\nReports media changed:",
3520 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3521 goto done;
3522 if (cdrom_print_info("\nCan play audio:\t",
3523 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3524 goto done;
3525 if (cdrom_print_info("\nCan write CD-R:\t",
3526 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3527 goto done;
3528 if (cdrom_print_info("\nCan write CD-RW:",
3529 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3530 goto done;
3531 if (cdrom_print_info("\nCan read DVD:\t",
3532 CDC_DVD, info, &pos, CTL_CAPABILITY))
3533 goto done;
3534 if (cdrom_print_info("\nCan write DVD-R:",
3535 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3536 goto done;
3537 if (cdrom_print_info("\nCan write DVD-RAM:",
3538 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3539 goto done;
3540 if (cdrom_print_info("\nCan read MRW:\t",
3541 CDC_MRW, info, &pos, CTL_CAPABILITY))
3542 goto done;
3543 if (cdrom_print_info("\nCan write MRW:\t",
3544 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3545 goto done;
3546 if (cdrom_print_info("\nCan write RAM:\t",
3547 CDC_RAM, info, &pos, CTL_CAPABILITY))
3548 goto done;
3549 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3550 goto done;
3551doit:
3552 mutex_unlock(&cdrom_mutex);
3553 return proc_dostring(ctl, write, buffer, lenp, ppos);
3554done:
3555 pr_info("info buffer too small\n");
3556 goto doit;
3557}
3558
3559/* Unfortunately, per device settings are not implemented through
3560 procfs/sysctl yet. When they are, this will naturally disappear. For now
3561 just update all drives. Later this will become the template on which
3562 new registered drives will be based. */
3563static void cdrom_update_settings(void)
3564{
3565 struct cdrom_device_info *cdi;
3566
3567 mutex_lock(&cdrom_mutex);
3568 list_for_each_entry(cdi, &cdrom_list, list) {
3569 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3570 cdi->options |= CDO_AUTO_CLOSE;
3571 else if (!autoclose)
3572 cdi->options &= ~CDO_AUTO_CLOSE;
3573 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3574 cdi->options |= CDO_AUTO_EJECT;
3575 else if (!autoeject)
3576 cdi->options &= ~CDO_AUTO_EJECT;
3577 if (lockdoor && CDROM_CAN(CDC_LOCK))
3578 cdi->options |= CDO_LOCK;
3579 else if (!lockdoor)
3580 cdi->options &= ~CDO_LOCK;
3581 if (check_media_type)
3582 cdi->options |= CDO_CHECK_TYPE;
3583 else
3584 cdi->options &= ~CDO_CHECK_TYPE;
3585 }
3586 mutex_unlock(&cdrom_mutex);
3587}
3588
3589static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3590 void *buffer, size_t *lenp, loff_t *ppos)
3591{
3592 int ret;
3593
3594 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3595
3596 if (write) {
3597
3598 /* we only care for 1 or 0. */
3599 autoclose = !!cdrom_sysctl_settings.autoclose;
3600 autoeject = !!cdrom_sysctl_settings.autoeject;
3601 debug = !!cdrom_sysctl_settings.debug;
3602 lockdoor = !!cdrom_sysctl_settings.lock;
3603 check_media_type = !!cdrom_sysctl_settings.check;
3604
3605 /* update the option flags according to the changes. we
3606 don't have per device options through sysctl yet,
3607 but we will have and then this will disappear. */
3608 cdrom_update_settings();
3609 }
3610
3611 return ret;
3612}
3613
3614/* Place files in /proc/sys/dev/cdrom */
3615static struct ctl_table cdrom_table[] = {
3616 {
3617 .procname = "info",
3618 .data = &cdrom_sysctl_settings.info,
3619 .maxlen = CDROM_STR_SIZE,
3620 .mode = 0444,
3621 .proc_handler = cdrom_sysctl_info,
3622 },
3623 {
3624 .procname = "autoclose",
3625 .data = &cdrom_sysctl_settings.autoclose,
3626 .maxlen = sizeof(int),
3627 .mode = 0644,
3628 .proc_handler = cdrom_sysctl_handler,
3629 },
3630 {
3631 .procname = "autoeject",
3632 .data = &cdrom_sysctl_settings.autoeject,
3633 .maxlen = sizeof(int),
3634 .mode = 0644,
3635 .proc_handler = cdrom_sysctl_handler,
3636 },
3637 {
3638 .procname = "debug",
3639 .data = &cdrom_sysctl_settings.debug,
3640 .maxlen = sizeof(int),
3641 .mode = 0644,
3642 .proc_handler = cdrom_sysctl_handler,
3643 },
3644 {
3645 .procname = "lock",
3646 .data = &cdrom_sysctl_settings.lock,
3647 .maxlen = sizeof(int),
3648 .mode = 0644,
3649 .proc_handler = cdrom_sysctl_handler,
3650 },
3651 {
3652 .procname = "check_media",
3653 .data = &cdrom_sysctl_settings.check,
3654 .maxlen = sizeof(int),
3655 .mode = 0644,
3656 .proc_handler = cdrom_sysctl_handler
3657 },
3658};
3659static struct ctl_table_header *cdrom_sysctl_header;
3660
3661static void cdrom_sysctl_register(void)
3662{
3663 static atomic_t initialized = ATOMIC_INIT(0);
3664
3665 if (!atomic_add_unless(&initialized, 1, 1))
3666 return;
3667
3668 cdrom_sysctl_header = register_sysctl("dev/cdrom", cdrom_table);
3669
3670 /* set the defaults */
3671 cdrom_sysctl_settings.autoclose = autoclose;
3672 cdrom_sysctl_settings.autoeject = autoeject;
3673 cdrom_sysctl_settings.debug = debug;
3674 cdrom_sysctl_settings.lock = lockdoor;
3675 cdrom_sysctl_settings.check = check_media_type;
3676}
3677
3678static void cdrom_sysctl_unregister(void)
3679{
3680 if (cdrom_sysctl_header)
3681 unregister_sysctl_table(cdrom_sysctl_header);
3682}
3683
3684#else /* CONFIG_SYSCTL */
3685
3686static void cdrom_sysctl_register(void)
3687{
3688}
3689
3690static void cdrom_sysctl_unregister(void)
3691{
3692}
3693
3694#endif /* CONFIG_SYSCTL */
3695
3696static int __init cdrom_init(void)
3697{
3698 cdrom_sysctl_register();
3699
3700 return 0;
3701}
3702
3703static void __exit cdrom_exit(void)
3704{
3705 pr_info("Uniform CD-ROM driver unloaded\n");
3706 cdrom_sysctl_unregister();
3707}
3708
3709module_init(cdrom_init);
3710module_exit(cdrom_exit);
3711MODULE_LICENSE("GPL");
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
285#include <asm/uaccess.h>
286
287/* used to tell the module to turn on full debugging messages */
288static bool debug;
289/* default compatibility mode */
290static bool autoclose=1;
291static bool autoeject;
292static bool lockdoor = 1;
293/* will we ever get to use this... sigh. */
294static bool check_media_type;
295/* automatically restart mrw format */
296static bool mrw_format_restart = 1;
297module_param(debug, bool, 0);
298module_param(autoclose, bool, 0);
299module_param(autoeject, bool, 0);
300module_param(lockdoor, bool, 0);
301module_param(check_media_type, bool, 0);
302module_param(mrw_format_restart, bool, 0);
303
304static DEFINE_MUTEX(cdrom_mutex);
305
306static const char *mrw_format_status[] = {
307 "not mrw",
308 "bgformat inactive",
309 "bgformat active",
310 "mrw complete",
311};
312
313static const char *mrw_address_space[] = { "DMA", "GAA" };
314
315#if (ERRLOGMASK != CD_NOTHING)
316#define cd_dbg(type, fmt, ...) \
317do { \
318 if ((ERRLOGMASK & type) || debug == 1) \
319 pr_debug(fmt, ##__VA_ARGS__); \
320} while (0)
321#else
322#define cd_dbg(type, fmt, ...) \
323do { \
324 if (0 && (ERRLOGMASK & type) || debug == 1) \
325 pr_debug(fmt, ##__VA_ARGS__); \
326} while (0)
327#endif
328
329/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
330 a lot of places. This macro makes the code more clear. */
331#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
332
333/*
334 * Another popular OS uses 7 seconds as the hard timeout for default
335 * commands, so it is a good choice for us as well.
336 */
337#define CDROM_DEF_TIMEOUT (7 * HZ)
338
339/* Not-exported routines. */
340
341static void cdrom_sysctl_register(void);
342
343static LIST_HEAD(cdrom_list);
344
345static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
346 struct packet_command *cgc)
347{
348 if (cgc->sense) {
349 cgc->sense->sense_key = 0x05;
350 cgc->sense->asc = 0x20;
351 cgc->sense->ascq = 0x00;
352 }
353
354 cgc->stat = -EIO;
355 return -EIO;
356}
357
358static int cdrom_flush_cache(struct cdrom_device_info *cdi)
359{
360 struct packet_command cgc;
361
362 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
363 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
364
365 cgc.timeout = 5 * 60 * HZ;
366
367 return cdi->ops->generic_packet(cdi, &cgc);
368}
369
370/* requires CD R/RW */
371static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
372 disc_information *di)
373{
374 struct cdrom_device_ops *cdo = cdi->ops;
375 struct packet_command cgc;
376 int ret, buflen;
377
378 /* set up command and get the disc info */
379 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
380 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
381 cgc.cmd[8] = cgc.buflen = 2;
382 cgc.quiet = 1;
383
384 ret = cdo->generic_packet(cdi, &cgc);
385 if (ret)
386 return ret;
387
388 /* not all drives have the same disc_info length, so requeue
389 * packet with the length the drive tells us it can supply
390 */
391 buflen = be16_to_cpu(di->disc_information_length) +
392 sizeof(di->disc_information_length);
393
394 if (buflen > sizeof(disc_information))
395 buflen = sizeof(disc_information);
396
397 cgc.cmd[8] = cgc.buflen = buflen;
398 ret = cdo->generic_packet(cdi, &cgc);
399 if (ret)
400 return ret;
401
402 /* return actual fill size */
403 return buflen;
404}
405
406/* This macro makes sure we don't have to check on cdrom_device_ops
407 * existence in the run-time routines below. Change_capability is a
408 * hack to have the capability flags defined const, while we can still
409 * change it here without gcc complaining at every line.
410 */
411#define ENSURE(call, bits) \
412do { \
413 if (cdo->call == NULL) \
414 *change_capability &= ~(bits); \
415} while (0)
416
417/*
418 * the first prototypes used 0x2c as the page code for the mrw mode page,
419 * subsequently this was changed to 0x03. probe the one used by this drive
420 */
421static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
422{
423 struct packet_command cgc;
424 char buffer[16];
425
426 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
427
428 cgc.timeout = HZ;
429 cgc.quiet = 1;
430
431 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
432 cdi->mrw_mode_page = MRW_MODE_PC;
433 return 0;
434 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
435 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
436 return 0;
437 }
438
439 return 1;
440}
441
442static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
443{
444 struct packet_command cgc;
445 struct mrw_feature_desc *mfd;
446 unsigned char buffer[16];
447 int ret;
448
449 *write = 0;
450
451 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
452
453 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
454 cgc.cmd[3] = CDF_MRW;
455 cgc.cmd[8] = sizeof(buffer);
456 cgc.quiet = 1;
457
458 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
459 return ret;
460
461 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
462 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
463 return 1;
464 *write = mfd->write;
465
466 if ((ret = cdrom_mrw_probe_pc(cdi))) {
467 *write = 0;
468 return ret;
469 }
470
471 return 0;
472}
473
474static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
475{
476 struct packet_command cgc;
477 unsigned char buffer[12];
478 int ret;
479
480 pr_info("%sstarting format\n", cont ? "Re" : "");
481
482 /*
483 * FmtData bit set (bit 4), format type is 1
484 */
485 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
486 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
487 cgc.cmd[1] = (1 << 4) | 1;
488
489 cgc.timeout = 5 * 60 * HZ;
490
491 /*
492 * 4 byte format list header, 8 byte format list descriptor
493 */
494 buffer[1] = 1 << 1;
495 buffer[3] = 8;
496
497 /*
498 * nr_blocks field
499 */
500 buffer[4] = 0xff;
501 buffer[5] = 0xff;
502 buffer[6] = 0xff;
503 buffer[7] = 0xff;
504
505 buffer[8] = 0x24 << 2;
506 buffer[11] = cont;
507
508 ret = cdi->ops->generic_packet(cdi, &cgc);
509 if (ret)
510 pr_info("bgformat failed\n");
511
512 return ret;
513}
514
515static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
516{
517 struct packet_command cgc;
518
519 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
520 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
521
522 /*
523 * Session = 1, Track = 0
524 */
525 cgc.cmd[1] = !!immed;
526 cgc.cmd[2] = 1 << 1;
527
528 cgc.timeout = 5 * 60 * HZ;
529
530 return cdi->ops->generic_packet(cdi, &cgc);
531}
532
533static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
534{
535 disc_information di;
536 int ret;
537
538 ret = cdrom_get_disc_info(cdi, &di);
539 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
540 return 1;
541
542 ret = 0;
543 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
544 pr_info("issuing MRW background format suspend\n");
545 ret = cdrom_mrw_bgformat_susp(cdi, 0);
546 }
547
548 if (!ret && cdi->media_written)
549 ret = cdrom_flush_cache(cdi);
550
551 return ret;
552}
553
554static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
555{
556 struct packet_command cgc;
557 struct mode_page_header *mph;
558 char buffer[16];
559 int ret, offset, size;
560
561 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
562
563 cgc.buffer = buffer;
564 cgc.buflen = sizeof(buffer);
565
566 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
567 if (ret)
568 return ret;
569
570 mph = (struct mode_page_header *)buffer;
571 offset = be16_to_cpu(mph->desc_length);
572 size = be16_to_cpu(mph->mode_data_length) + 2;
573
574 buffer[offset + 3] = space;
575 cgc.buflen = size;
576
577 ret = cdrom_mode_select(cdi, &cgc);
578 if (ret)
579 return ret;
580
581 pr_info("%s: mrw address space %s selected\n",
582 cdi->name, mrw_address_space[space]);
583 return 0;
584}
585
586int register_cdrom(struct cdrom_device_info *cdi)
587{
588 static char banner_printed;
589 struct cdrom_device_ops *cdo = cdi->ops;
590 int *change_capability = (int *)&cdo->capability; /* hack */
591
592 cd_dbg(CD_OPEN, "entering register_cdrom\n");
593
594 if (cdo->open == NULL || cdo->release == NULL)
595 return -EINVAL;
596 if (!banner_printed) {
597 pr_info("Uniform CD-ROM driver " REVISION "\n");
598 banner_printed = 1;
599 cdrom_sysctl_register();
600 }
601
602 ENSURE(drive_status, CDC_DRIVE_STATUS);
603 if (cdo->check_events == NULL && cdo->media_changed == NULL)
604 *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
605 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
606 ENSURE(lock_door, CDC_LOCK);
607 ENSURE(select_speed, CDC_SELECT_SPEED);
608 ENSURE(get_last_session, CDC_MULTI_SESSION);
609 ENSURE(get_mcn, CDC_MCN);
610 ENSURE(reset, CDC_RESET);
611 ENSURE(generic_packet, CDC_GENERIC_PACKET);
612 cdi->mc_flags = 0;
613 cdo->n_minors = 0;
614 cdi->options = CDO_USE_FFLAGS;
615
616 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
617 cdi->options |= (int) CDO_AUTO_CLOSE;
618 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
619 cdi->options |= (int) CDO_AUTO_EJECT;
620 if (lockdoor == 1)
621 cdi->options |= (int) CDO_LOCK;
622 if (check_media_type == 1)
623 cdi->options |= (int) CDO_CHECK_TYPE;
624
625 if (CDROM_CAN(CDC_MRW_W))
626 cdi->exit = cdrom_mrw_exit;
627
628 if (cdi->disk)
629 cdi->cdda_method = CDDA_BPC_FULL;
630 else
631 cdi->cdda_method = CDDA_OLD;
632
633 if (!cdo->generic_packet)
634 cdo->generic_packet = cdrom_dummy_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 cdi->ops->n_minors--;
656 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
657}
658
659int cdrom_get_media_event(struct cdrom_device_info *cdi,
660 struct media_event_desc *med)
661{
662 struct packet_command cgc;
663 unsigned char buffer[8];
664 struct event_header *eh = (struct event_header *)buffer;
665
666 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
667 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
668 cgc.cmd[1] = 1; /* IMMED */
669 cgc.cmd[4] = 1 << 4; /* media event */
670 cgc.cmd[8] = sizeof(buffer);
671 cgc.quiet = 1;
672
673 if (cdi->ops->generic_packet(cdi, &cgc))
674 return 1;
675
676 if (be16_to_cpu(eh->data_len) < sizeof(*med))
677 return 1;
678
679 if (eh->nea || eh->notification_class != 0x4)
680 return 1;
681
682 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
683 return 0;
684}
685
686static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
687 struct rwrt_feature_desc *rfd)
688{
689 struct packet_command cgc;
690 char buffer[24];
691 int ret;
692
693 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
694
695 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
696 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
697 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
698 cgc.quiet = 1;
699
700 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
701 return ret;
702
703 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
704 return 0;
705}
706
707static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
708{
709 struct packet_command cgc;
710 char buffer[16];
711 __be16 *feature_code;
712 int ret;
713
714 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
715
716 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
717 cgc.cmd[3] = CDF_HWDM;
718 cgc.cmd[8] = sizeof(buffer);
719 cgc.quiet = 1;
720
721 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
722 return ret;
723
724 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
725 if (be16_to_cpu(*feature_code) == CDF_HWDM)
726 return 0;
727
728 return 1;
729}
730
731
732static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
733{
734 struct rwrt_feature_desc rfd;
735 int ret;
736
737 *write = 0;
738
739 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
740 return ret;
741
742 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
743 *write = 1;
744
745 return 0;
746}
747
748static int cdrom_media_erasable(struct cdrom_device_info *cdi)
749{
750 disc_information di;
751 int ret;
752
753 ret = cdrom_get_disc_info(cdi, &di);
754 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
755 return -1;
756
757 return di.erasable;
758}
759
760/*
761 * FIXME: check RO bit
762 */
763static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
764{
765 int ret = cdrom_media_erasable(cdi);
766
767 /*
768 * allow writable open if media info read worked and media is
769 * erasable, _or_ if it fails since not all drives support it
770 */
771 if (!ret)
772 return 1;
773
774 return 0;
775}
776
777static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
778{
779 disc_information di;
780 int ret;
781
782 /*
783 * always reset to DMA lba space on open
784 */
785 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
786 pr_err("failed setting lba address space\n");
787 return 1;
788 }
789
790 ret = cdrom_get_disc_info(cdi, &di);
791 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
792 return 1;
793
794 if (!di.erasable)
795 return 1;
796
797 /*
798 * mrw_status
799 * 0 - not MRW formatted
800 * 1 - MRW bgformat started, but not running or complete
801 * 2 - MRW bgformat in progress
802 * 3 - MRW formatting complete
803 */
804 ret = 0;
805 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
806 if (!di.mrw_status)
807 ret = 1;
808 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
809 mrw_format_restart)
810 ret = cdrom_mrw_bgformat(cdi, 1);
811
812 return ret;
813}
814
815static int mo_open_write(struct cdrom_device_info *cdi)
816{
817 struct packet_command cgc;
818 char buffer[255];
819 int ret;
820
821 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
822 cgc.quiet = 1;
823
824 /*
825 * obtain write protect information as per
826 * drivers/scsi/sd.c:sd_read_write_protect_flag
827 */
828
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
830 if (ret)
831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
832 if (ret) {
833 cgc.buflen = 255;
834 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
835 }
836
837 /* drive gave us no info, let the user go ahead */
838 if (ret)
839 return 0;
840
841 return buffer[3] & 0x80;
842}
843
844static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
845{
846 struct rwrt_feature_desc rfd;
847 int ret;
848
849 if ((ret = cdrom_has_defect_mgt(cdi)))
850 return ret;
851
852 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
853 return ret;
854 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
855 ret = !rfd.curr;
856
857 cd_dbg(CD_OPEN, "can open for random write\n");
858 return ret;
859}
860
861static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
862{
863 struct packet_command cgc;
864 char buffer[32];
865 int ret, mmc3_profile;
866
867 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
868
869 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
870 cgc.cmd[1] = 0;
871 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
872 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
873 cgc.quiet = 1;
874
875 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
876 mmc3_profile = 0xffff;
877 else
878 mmc3_profile = (buffer[6] << 8) | buffer[7];
879
880 cdi->mmc3_profile = mmc3_profile;
881}
882
883static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
884{
885 switch (cdi->mmc3_profile) {
886 case 0x12: /* DVD-RAM */
887 case 0x1A: /* DVD+RW */
888 case 0x43: /* BD-RE */
889 return 0;
890 default:
891 return 1;
892 }
893}
894
895/*
896 * returns 0 for ok to open write, non-0 to disallow
897 */
898static int cdrom_open_write(struct cdrom_device_info *cdi)
899{
900 int mrw, mrw_write, ram_write;
901 int ret = 1;
902
903 mrw = 0;
904 if (!cdrom_is_mrw(cdi, &mrw_write))
905 mrw = 1;
906
907 if (CDROM_CAN(CDC_MO_DRIVE))
908 ram_write = 1;
909 else
910 (void) cdrom_is_random_writable(cdi, &ram_write);
911
912 if (mrw)
913 cdi->mask &= ~CDC_MRW;
914 else
915 cdi->mask |= CDC_MRW;
916
917 if (mrw_write)
918 cdi->mask &= ~CDC_MRW_W;
919 else
920 cdi->mask |= CDC_MRW_W;
921
922 if (ram_write)
923 cdi->mask &= ~CDC_RAM;
924 else
925 cdi->mask |= CDC_RAM;
926
927 if (CDROM_CAN(CDC_MRW_W))
928 ret = cdrom_mrw_open_write(cdi);
929 else if (CDROM_CAN(CDC_DVD_RAM))
930 ret = cdrom_dvdram_open_write(cdi);
931 else if (CDROM_CAN(CDC_RAM) &&
932 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
933 ret = cdrom_ram_open_write(cdi);
934 else if (CDROM_CAN(CDC_MO_DRIVE))
935 ret = mo_open_write(cdi);
936 else if (!cdrom_is_dvd_rw(cdi))
937 ret = 0;
938
939 return ret;
940}
941
942static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
943{
944 struct packet_command cgc;
945
946 if (cdi->mmc3_profile != 0x1a) {
947 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
948 return;
949 }
950
951 if (!cdi->media_written) {
952 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
953 return;
954 }
955
956 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
957
958 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
959 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
960 cgc.timeout = 30*HZ;
961 cdi->ops->generic_packet(cdi, &cgc);
962
963 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
964 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
965 cgc.timeout = 3000*HZ;
966 cgc.quiet = 1;
967 cdi->ops->generic_packet(cdi, &cgc);
968
969 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
970 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
971 cgc.cmd[2] = 2; /* Close session */
972 cgc.quiet = 1;
973 cgc.timeout = 3000*HZ;
974 cdi->ops->generic_packet(cdi, &cgc);
975
976 cdi->media_written = 0;
977}
978
979static int cdrom_close_write(struct cdrom_device_info *cdi)
980{
981#if 0
982 return cdrom_flush_cache(cdi);
983#else
984 return 0;
985#endif
986}
987
988/* badly broken, I know. Is due for a fixup anytime. */
989static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
990{
991 struct cdrom_tochdr header;
992 struct cdrom_tocentry entry;
993 int ret, i;
994 tracks->data = 0;
995 tracks->audio = 0;
996 tracks->cdi = 0;
997 tracks->xa = 0;
998 tracks->error = 0;
999 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1000 /* Grab the TOC header so we can see how many tracks there are */
1001 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1002 if (ret) {
1003 if (ret == -ENOMEDIUM)
1004 tracks->error = CDS_NO_DISC;
1005 else
1006 tracks->error = CDS_NO_INFO;
1007 return;
1008 }
1009 /* check what type of tracks are on this disc */
1010 entry.cdte_format = CDROM_MSF;
1011 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1012 entry.cdte_track = i;
1013 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1014 tracks->error = CDS_NO_INFO;
1015 return;
1016 }
1017 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1018 if (entry.cdte_format == 0x10)
1019 tracks->cdi++;
1020 else if (entry.cdte_format == 0x20)
1021 tracks->xa++;
1022 else
1023 tracks->data++;
1024 } else {
1025 tracks->audio++;
1026 }
1027 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1028 i, entry.cdte_format, entry.cdte_ctrl);
1029 }
1030 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1031 header.cdth_trk1, tracks->audio, tracks->data,
1032 tracks->cdi, tracks->xa);
1033}
1034
1035static
1036int open_for_data(struct cdrom_device_info *cdi)
1037{
1038 int ret;
1039 struct cdrom_device_ops *cdo = cdi->ops;
1040 tracktype tracks;
1041 cd_dbg(CD_OPEN, "entering open_for_data\n");
1042 /* Check if the driver can report drive status. If it can, we
1043 can do clever things. If it can't, well, we at least tried! */
1044 if (cdo->drive_status != NULL) {
1045 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1046 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1047 if (ret == CDS_TRAY_OPEN) {
1048 cd_dbg(CD_OPEN, "the tray is open...\n");
1049 /* can/may i close it? */
1050 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1051 cdi->options & CDO_AUTO_CLOSE) {
1052 cd_dbg(CD_OPEN, "trying to close the tray\n");
1053 ret=cdo->tray_move(cdi,0);
1054 if (ret) {
1055 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1056 /* Ignore the error from the low
1057 level driver. We don't care why it
1058 couldn't close the tray. We only care
1059 that there is no disc in the drive,
1060 since that is the _REAL_ problem here.*/
1061 ret=-ENOMEDIUM;
1062 goto clean_up_and_return;
1063 }
1064 } else {
1065 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1066 ret=-ENOMEDIUM;
1067 goto clean_up_and_return;
1068 }
1069 /* Ok, the door should be closed now.. Check again */
1070 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1072 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1073 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 cd_dbg(CD_OPEN, "the tray is now closed\n");
1078 }
1079 /* the door should be closed now, check for the disc */
1080 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1081 if (ret!=CDS_DISC_OK) {
1082 ret = -ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 }
1086 cdrom_count_tracks(cdi, &tracks);
1087 if (tracks.error == CDS_NO_DISC) {
1088 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1089 ret=-ENOMEDIUM;
1090 goto clean_up_and_return;
1091 }
1092 /* CD-Players which don't use O_NONBLOCK, workman
1093 * for example, need bit CDO_CHECK_TYPE cleared! */
1094 if (tracks.data==0) {
1095 if (cdi->options & CDO_CHECK_TYPE) {
1096 /* give people a warning shot, now that CDO_CHECK_TYPE
1097 is the default case! */
1098 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1099 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1100 (unsigned int)task_pid_nr(current));
1101 ret=-EMEDIUMTYPE;
1102 goto clean_up_and_return;
1103 }
1104 else {
1105 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1106 }
1107 }
1108
1109 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1110
1111 /* all seems well, we can open the device */
1112 ret = cdo->open(cdi, 0); /* open for data */
1113 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1114 /* After all this careful checking, we shouldn't have problems
1115 opening the device, but we don't want the device locked if
1116 this somehow fails... */
1117 if (ret) {
1118 cd_dbg(CD_OPEN, "open device failed\n");
1119 goto clean_up_and_return;
1120 }
1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1122 cdo->lock_door(cdi, 1);
1123 cd_dbg(CD_OPEN, "door locked\n");
1124 }
1125 cd_dbg(CD_OPEN, "device opened successfully\n");
1126 return ret;
1127
1128 /* Something failed. Try to unlock the drive, because some drivers
1129 (notably ide-cd) lock the drive after every command. This produced
1130 a nasty bug where after mount failed, the drive would remain locked!
1131 This ensures that the drive gets unlocked after a mount fails. This
1132 is a goto to avoid bloating the driver with redundant code. */
1133clean_up_and_return:
1134 cd_dbg(CD_OPEN, "open failed\n");
1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1136 cdo->lock_door(cdi, 0);
1137 cd_dbg(CD_OPEN, "door unlocked\n");
1138 }
1139 return ret;
1140}
1141
1142/* We use the open-option O_NONBLOCK to indicate that the
1143 * purpose of opening is only for subsequent ioctl() calls; no device
1144 * integrity checks are performed.
1145 *
1146 * We hope that all cd-player programs will adopt this convention. It
1147 * is in their own interest: device control becomes a lot easier
1148 * this way.
1149 */
1150int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1151 fmode_t mode)
1152{
1153 int ret;
1154
1155 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1156
1157 /* open is event synchronization point, check events first */
1158 check_disk_change(bdev);
1159
1160 /* if this was a O_NONBLOCK open and we should honor the flags,
1161 * do a quick open without drive/disc integrity checks. */
1162 cdi->use_count++;
1163 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1164 ret = cdi->ops->open(cdi, 1);
1165 } else {
1166 ret = open_for_data(cdi);
1167 if (ret)
1168 goto err;
1169 cdrom_mmc3_profile(cdi);
1170 if (mode & FMODE_WRITE) {
1171 ret = -EROFS;
1172 if (cdrom_open_write(cdi))
1173 goto err_release;
1174 if (!CDROM_CAN(CDC_RAM))
1175 goto err_release;
1176 ret = 0;
1177 cdi->media_written = 0;
1178 }
1179 }
1180
1181 if (ret)
1182 goto err;
1183
1184 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1185 cdi->name, cdi->use_count);
1186 return 0;
1187err_release:
1188 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1189 cdi->ops->lock_door(cdi, 0);
1190 cd_dbg(CD_OPEN, "door unlocked\n");
1191 }
1192 cdi->ops->release(cdi);
1193err:
1194 cdi->use_count--;
1195 return ret;
1196}
1197
1198/* This code is similar to that in open_for_data. The routine is called
1199 whenever an audio play operation is requested.
1200*/
1201static int check_for_audio_disc(struct cdrom_device_info * cdi,
1202 struct cdrom_device_ops * cdo)
1203{
1204 int ret;
1205 tracktype tracks;
1206 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1207 if (!(cdi->options & CDO_CHECK_TYPE))
1208 return 0;
1209 if (cdo->drive_status != NULL) {
1210 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1211 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1212 if (ret == CDS_TRAY_OPEN) {
1213 cd_dbg(CD_OPEN, "the tray is open...\n");
1214 /* can/may i close it? */
1215 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1216 cdi->options & CDO_AUTO_CLOSE) {
1217 cd_dbg(CD_OPEN, "trying to close the tray\n");
1218 ret=cdo->tray_move(cdi,0);
1219 if (ret) {
1220 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1221 /* Ignore the error from the low
1222 level driver. We don't care why it
1223 couldn't close the tray. We only care
1224 that there is no disc in the drive,
1225 since that is the _REAL_ problem here.*/
1226 return -ENOMEDIUM;
1227 }
1228 } else {
1229 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1230 return -ENOMEDIUM;
1231 }
1232 /* Ok, the door should be closed now.. Check again */
1233 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1234 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1235 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1236 return -ENOMEDIUM;
1237 }
1238 if (ret!=CDS_DISC_OK) {
1239 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1240 return -EIO;
1241 }
1242 cd_dbg(CD_OPEN, "the tray is now closed\n");
1243 }
1244 }
1245 cdrom_count_tracks(cdi, &tracks);
1246 if (tracks.error)
1247 return(tracks.error);
1248
1249 if (tracks.audio==0)
1250 return -EMEDIUMTYPE;
1251
1252 return 0;
1253}
1254
1255void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1256{
1257 struct cdrom_device_ops *cdo = cdi->ops;
1258 int opened_for_data;
1259
1260 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1261
1262 if (cdi->use_count > 0)
1263 cdi->use_count--;
1264
1265 if (cdi->use_count == 0) {
1266 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1267 cdi->name);
1268 cdrom_dvd_rw_close_write(cdi);
1269
1270 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1271 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1272 cdo->lock_door(cdi, 0);
1273 }
1274 }
1275
1276 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1277 !(mode & FMODE_NDELAY);
1278
1279 /*
1280 * flush cache on last write release
1281 */
1282 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1283 cdrom_close_write(cdi);
1284
1285 cdo->release(cdi);
1286 if (cdi->use_count == 0) { /* last process that closes dev*/
1287 if (opened_for_data &&
1288 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1289 cdo->tray_move(cdi, 1);
1290 }
1291}
1292
1293static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1294 struct cdrom_changer_info *buf)
1295{
1296 struct packet_command cgc;
1297 struct cdrom_device_ops *cdo = cdi->ops;
1298 int length;
1299
1300 /*
1301 * Sanyo changer isn't spec compliant (doesn't use regular change
1302 * LOAD_UNLOAD command, and it doesn't implement the mech status
1303 * command below
1304 */
1305 if (cdi->sanyo_slot) {
1306 buf->hdr.nslots = 3;
1307 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1308 for (length = 0; length < 3; length++) {
1309 buf->slots[length].disc_present = 1;
1310 buf->slots[length].change = 0;
1311 }
1312 return 0;
1313 }
1314
1315 length = sizeof(struct cdrom_mechstat_header) +
1316 cdi->capacity * sizeof(struct cdrom_slot);
1317
1318 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1319 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1320 cgc.cmd[8] = (length >> 8) & 0xff;
1321 cgc.cmd[9] = length & 0xff;
1322 return cdo->generic_packet(cdi, &cgc);
1323}
1324
1325static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1326{
1327 struct cdrom_changer_info *info;
1328 int ret;
1329
1330 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1331 if (cdi->sanyo_slot)
1332 return CDS_NO_INFO;
1333
1334 info = kmalloc(sizeof(*info), GFP_KERNEL);
1335 if (!info)
1336 return -ENOMEM;
1337
1338 if ((ret = cdrom_read_mech_status(cdi, info)))
1339 goto out_free;
1340
1341 if (info->slots[slot].disc_present)
1342 ret = CDS_DISC_OK;
1343 else
1344 ret = CDS_NO_DISC;
1345
1346out_free:
1347 kfree(info);
1348 return ret;
1349}
1350
1351/* Return the number of slots for an ATAPI/SCSI cdrom,
1352 * return 1 if not a changer.
1353 */
1354int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1355{
1356 int status;
1357 int nslots = 1;
1358 struct cdrom_changer_info *info;
1359
1360 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1361 /* cdrom_read_mech_status requires a valid value for capacity: */
1362 cdi->capacity = 0;
1363
1364 info = kmalloc(sizeof(*info), GFP_KERNEL);
1365 if (!info)
1366 return -ENOMEM;
1367
1368 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1369 nslots = info->hdr.nslots;
1370
1371 kfree(info);
1372 return nslots;
1373}
1374
1375
1376/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1377static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1378{
1379 struct packet_command cgc;
1380
1381 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1382 if (cdi->sanyo_slot && slot < 0)
1383 return 0;
1384
1385 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1386 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1387 cgc.cmd[4] = 2 + (slot >= 0);
1388 cgc.cmd[8] = slot;
1389 cgc.timeout = 60 * HZ;
1390
1391 /* The Sanyo 3 CD changer uses byte 7 of the
1392 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1393 using the GPCMD_LOAD_UNLOAD opcode. */
1394 if (cdi->sanyo_slot && -1 < slot) {
1395 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1396 cgc.cmd[7] = slot;
1397 cgc.cmd[4] = cgc.cmd[8] = 0;
1398 cdi->sanyo_slot = slot ? slot : 3;
1399 }
1400
1401 return cdi->ops->generic_packet(cdi, &cgc);
1402}
1403
1404static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1405{
1406 struct cdrom_changer_info *info;
1407 int curslot;
1408 int ret;
1409
1410 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1411 if (!CDROM_CAN(CDC_SELECT_DISC))
1412 return -EDRIVE_CANT_DO_THIS;
1413
1414 if (cdi->ops->check_events)
1415 cdi->ops->check_events(cdi, 0, slot);
1416 else
1417 cdi->ops->media_changed(cdi, slot);
1418
1419 if (slot == CDSL_NONE) {
1420 /* set media changed bits, on both queues */
1421 cdi->mc_flags = 0x3;
1422 return cdrom_load_unload(cdi, -1);
1423 }
1424
1425 info = kmalloc(sizeof(*info), GFP_KERNEL);
1426 if (!info)
1427 return -ENOMEM;
1428
1429 if ((ret = cdrom_read_mech_status(cdi, info))) {
1430 kfree(info);
1431 return ret;
1432 }
1433
1434 curslot = info->hdr.curslot;
1435 kfree(info);
1436
1437 if (cdi->use_count > 1 || cdi->keeplocked) {
1438 if (slot == CDSL_CURRENT) {
1439 return curslot;
1440 } else {
1441 return -EBUSY;
1442 }
1443 }
1444
1445 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1446 which is useful if it had been previously unloaded.
1447 Whether it can or not, it returns the current slot.
1448 Similarly, if slot happens to be the current one, we still
1449 try and load it. */
1450 if (slot == CDSL_CURRENT)
1451 slot = curslot;
1452
1453 /* set media changed bits on both queues */
1454 cdi->mc_flags = 0x3;
1455 if ((ret = cdrom_load_unload(cdi, slot)))
1456 return ret;
1457
1458 return slot;
1459}
1460
1461/*
1462 * As cdrom implements an extra ioctl consumer for media changed
1463 * event, it needs to buffer ->check_events() output, such that event
1464 * is not lost for both the usual VFS and ioctl paths.
1465 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1466 * path.
1467 *
1468 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1469 * called in parallel and buffering fields are accessed without any
1470 * exclusion. The original media_changed code had the same problem.
1471 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1472 * and remove this cruft altogether. It doesn't have much usefulness
1473 * at this point.
1474 */
1475static void cdrom_update_events(struct cdrom_device_info *cdi,
1476 unsigned int clearing)
1477{
1478 unsigned int events;
1479
1480 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1481 cdi->vfs_events |= events;
1482 cdi->ioctl_events |= events;
1483}
1484
1485unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1486 unsigned int clearing)
1487{
1488 unsigned int events;
1489
1490 cdrom_update_events(cdi, clearing);
1491 events = cdi->vfs_events;
1492 cdi->vfs_events = 0;
1493 return events;
1494}
1495EXPORT_SYMBOL(cdrom_check_events);
1496
1497/* We want to make media_changed accessible to the user through an
1498 * ioctl. The main problem now is that we must double-buffer the
1499 * low-level implementation, to assure that the VFS and the user both
1500 * see a medium change once.
1501 */
1502
1503static
1504int media_changed(struct cdrom_device_info *cdi, int queue)
1505{
1506 unsigned int mask = (1 << (queue & 1));
1507 int ret = !!(cdi->mc_flags & mask);
1508 bool changed;
1509
1510 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1511 return ret;
1512
1513 /* changed since last call? */
1514 if (cdi->ops->check_events) {
1515 BUG_ON(!queue); /* shouldn't be called from VFS path */
1516 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1517 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1518 cdi->ioctl_events = 0;
1519 } else
1520 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1521
1522 if (changed) {
1523 cdi->mc_flags = 0x3; /* set bit on both queues */
1524 ret |= 1;
1525 cdi->media_written = 0;
1526 }
1527
1528 cdi->mc_flags &= ~mask; /* clear bit */
1529 return ret;
1530}
1531
1532int cdrom_media_changed(struct cdrom_device_info *cdi)
1533{
1534 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1535 * Returning "0" is always safe (media hasn't been changed). Do that
1536 * if the low-level cdrom driver dosn't support media changed. */
1537 if (cdi == NULL || cdi->ops->media_changed == NULL)
1538 return 0;
1539 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1540 return 0;
1541 return media_changed(cdi, 0);
1542}
1543
1544/* Requests to the low-level drivers will /always/ be done in the
1545 following format convention:
1546
1547 CDROM_LBA: all data-related requests.
1548 CDROM_MSF: all audio-related requests.
1549
1550 However, a low-level implementation is allowed to refuse this
1551 request, and return information in its own favorite format.
1552
1553 It doesn't make sense /at all/ to ask for a play_audio in LBA
1554 format, or ask for multi-session info in MSF format. However, for
1555 backward compatibility these format requests will be satisfied, but
1556 the requests to the low-level drivers will be sanitized in the more
1557 meaningful format indicated above.
1558 */
1559
1560static
1561void sanitize_format(union cdrom_addr *addr,
1562 u_char * curr, u_char requested)
1563{
1564 if (*curr == requested)
1565 return; /* nothing to be done! */
1566 if (requested == CDROM_LBA) {
1567 addr->lba = (int) addr->msf.frame +
1568 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1569 } else { /* CDROM_MSF */
1570 int lba = addr->lba;
1571 addr->msf.frame = lba % 75;
1572 lba /= 75;
1573 lba += 2;
1574 addr->msf.second = lba % 60;
1575 addr->msf.minute = lba / 60;
1576 }
1577 *curr = requested;
1578}
1579
1580void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1581 int type)
1582{
1583 memset(cgc, 0, sizeof(struct packet_command));
1584 if (buf)
1585 memset(buf, 0, len);
1586 cgc->buffer = (char *) buf;
1587 cgc->buflen = len;
1588 cgc->data_direction = type;
1589 cgc->timeout = CDROM_DEF_TIMEOUT;
1590}
1591
1592/* DVD handling */
1593
1594#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1595#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1596
1597static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1598{
1599 cgc->cmd[0] = GPCMD_REPORT_KEY;
1600 cgc->cmd[10] = type | (agid << 6);
1601 switch (type) {
1602 case 0: case 8: case 5: {
1603 cgc->buflen = 8;
1604 break;
1605 }
1606 case 1: {
1607 cgc->buflen = 16;
1608 break;
1609 }
1610 case 2: case 4: {
1611 cgc->buflen = 12;
1612 break;
1613 }
1614 }
1615 cgc->cmd[9] = cgc->buflen;
1616 cgc->data_direction = CGC_DATA_READ;
1617}
1618
1619static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1620{
1621 cgc->cmd[0] = GPCMD_SEND_KEY;
1622 cgc->cmd[10] = type | (agid << 6);
1623 switch (type) {
1624 case 1: {
1625 cgc->buflen = 16;
1626 break;
1627 }
1628 case 3: {
1629 cgc->buflen = 12;
1630 break;
1631 }
1632 case 6: {
1633 cgc->buflen = 8;
1634 break;
1635 }
1636 }
1637 cgc->cmd[9] = cgc->buflen;
1638 cgc->data_direction = CGC_DATA_WRITE;
1639}
1640
1641static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1642{
1643 int ret;
1644 u_char buf[20];
1645 struct packet_command cgc;
1646 struct cdrom_device_ops *cdo = cdi->ops;
1647 rpc_state_t rpc_state;
1648
1649 memset(buf, 0, sizeof(buf));
1650 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1651
1652 switch (ai->type) {
1653 /* LU data send */
1654 case DVD_LU_SEND_AGID:
1655 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1656 cgc.quiet = 1;
1657 setup_report_key(&cgc, ai->lsa.agid, 0);
1658
1659 if ((ret = cdo->generic_packet(cdi, &cgc)))
1660 return ret;
1661
1662 ai->lsa.agid = buf[7] >> 6;
1663 /* Returning data, let host change state */
1664 break;
1665
1666 case DVD_LU_SEND_KEY1:
1667 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1668 setup_report_key(&cgc, ai->lsk.agid, 2);
1669
1670 if ((ret = cdo->generic_packet(cdi, &cgc)))
1671 return ret;
1672
1673 copy_key(ai->lsk.key, &buf[4]);
1674 /* Returning data, let host change state */
1675 break;
1676
1677 case DVD_LU_SEND_CHALLENGE:
1678 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1679 setup_report_key(&cgc, ai->lsc.agid, 1);
1680
1681 if ((ret = cdo->generic_packet(cdi, &cgc)))
1682 return ret;
1683
1684 copy_chal(ai->lsc.chal, &buf[4]);
1685 /* Returning data, let host change state */
1686 break;
1687
1688 /* Post-auth key */
1689 case DVD_LU_SEND_TITLE_KEY:
1690 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1691 cgc.quiet = 1;
1692 setup_report_key(&cgc, ai->lstk.agid, 4);
1693 cgc.cmd[5] = ai->lstk.lba;
1694 cgc.cmd[4] = ai->lstk.lba >> 8;
1695 cgc.cmd[3] = ai->lstk.lba >> 16;
1696 cgc.cmd[2] = ai->lstk.lba >> 24;
1697
1698 if ((ret = cdo->generic_packet(cdi, &cgc)))
1699 return ret;
1700
1701 ai->lstk.cpm = (buf[4] >> 7) & 1;
1702 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1703 ai->lstk.cgms = (buf[4] >> 4) & 3;
1704 copy_key(ai->lstk.title_key, &buf[5]);
1705 /* Returning data, let host change state */
1706 break;
1707
1708 case DVD_LU_SEND_ASF:
1709 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1710 setup_report_key(&cgc, ai->lsasf.agid, 5);
1711
1712 if ((ret = cdo->generic_packet(cdi, &cgc)))
1713 return ret;
1714
1715 ai->lsasf.asf = buf[7] & 1;
1716 break;
1717
1718 /* LU data receive (LU changes state) */
1719 case DVD_HOST_SEND_CHALLENGE:
1720 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1721 setup_send_key(&cgc, ai->hsc.agid, 1);
1722 buf[1] = 0xe;
1723 copy_chal(&buf[4], ai->hsc.chal);
1724
1725 if ((ret = cdo->generic_packet(cdi, &cgc)))
1726 return ret;
1727
1728 ai->type = DVD_LU_SEND_KEY1;
1729 break;
1730
1731 case DVD_HOST_SEND_KEY2:
1732 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1733 setup_send_key(&cgc, ai->hsk.agid, 3);
1734 buf[1] = 0xa;
1735 copy_key(&buf[4], ai->hsk.key);
1736
1737 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1738 ai->type = DVD_AUTH_FAILURE;
1739 return ret;
1740 }
1741 ai->type = DVD_AUTH_ESTABLISHED;
1742 break;
1743
1744 /* Misc */
1745 case DVD_INVALIDATE_AGID:
1746 cgc.quiet = 1;
1747 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1748 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1749 if ((ret = cdo->generic_packet(cdi, &cgc)))
1750 return ret;
1751 break;
1752
1753 /* Get region settings */
1754 case DVD_LU_SEND_RPC_STATE:
1755 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1756 setup_report_key(&cgc, 0, 8);
1757 memset(&rpc_state, 0, sizeof(rpc_state_t));
1758 cgc.buffer = (char *) &rpc_state;
1759
1760 if ((ret = cdo->generic_packet(cdi, &cgc)))
1761 return ret;
1762
1763 ai->lrpcs.type = rpc_state.type_code;
1764 ai->lrpcs.vra = rpc_state.vra;
1765 ai->lrpcs.ucca = rpc_state.ucca;
1766 ai->lrpcs.region_mask = rpc_state.region_mask;
1767 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1768 break;
1769
1770 /* Set region settings */
1771 case DVD_HOST_SEND_RPC_STATE:
1772 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1773 setup_send_key(&cgc, 0, 6);
1774 buf[1] = 6;
1775 buf[4] = ai->hrpcs.pdrc;
1776
1777 if ((ret = cdo->generic_packet(cdi, &cgc)))
1778 return ret;
1779 break;
1780
1781 default:
1782 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1783 return -ENOTTY;
1784 }
1785
1786 return 0;
1787}
1788
1789static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1790 struct packet_command *cgc)
1791{
1792 unsigned char buf[21], *base;
1793 struct dvd_layer *layer;
1794 struct cdrom_device_ops *cdo = cdi->ops;
1795 int ret, layer_num = s->physical.layer_num;
1796
1797 if (layer_num >= DVD_LAYERS)
1798 return -EINVAL;
1799
1800 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1801 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1802 cgc->cmd[6] = layer_num;
1803 cgc->cmd[7] = s->type;
1804 cgc->cmd[9] = cgc->buflen & 0xff;
1805
1806 /*
1807 * refrain from reporting errors on non-existing layers (mainly)
1808 */
1809 cgc->quiet = 1;
1810
1811 ret = cdo->generic_packet(cdi, cgc);
1812 if (ret)
1813 return ret;
1814
1815 base = &buf[4];
1816 layer = &s->physical.layer[layer_num];
1817
1818 /*
1819 * place the data... really ugly, but at least we won't have to
1820 * worry about endianess in userspace.
1821 */
1822 memset(layer, 0, sizeof(*layer));
1823 layer->book_version = base[0] & 0xf;
1824 layer->book_type = base[0] >> 4;
1825 layer->min_rate = base[1] & 0xf;
1826 layer->disc_size = base[1] >> 4;
1827 layer->layer_type = base[2] & 0xf;
1828 layer->track_path = (base[2] >> 4) & 1;
1829 layer->nlayers = (base[2] >> 5) & 3;
1830 layer->track_density = base[3] & 0xf;
1831 layer->linear_density = base[3] >> 4;
1832 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1833 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1834 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1835 layer->bca = base[16] >> 7;
1836
1837 return 0;
1838}
1839
1840static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1841 struct packet_command *cgc)
1842{
1843 int ret;
1844 u_char buf[8];
1845 struct cdrom_device_ops *cdo = cdi->ops;
1846
1847 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1848 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1849 cgc->cmd[6] = s->copyright.layer_num;
1850 cgc->cmd[7] = s->type;
1851 cgc->cmd[8] = cgc->buflen >> 8;
1852 cgc->cmd[9] = cgc->buflen & 0xff;
1853
1854 ret = cdo->generic_packet(cdi, cgc);
1855 if (ret)
1856 return ret;
1857
1858 s->copyright.cpst = buf[4];
1859 s->copyright.rmi = buf[5];
1860
1861 return 0;
1862}
1863
1864static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1865 struct packet_command *cgc)
1866{
1867 int ret, size;
1868 u_char *buf;
1869 struct cdrom_device_ops *cdo = cdi->ops;
1870
1871 size = sizeof(s->disckey.value) + 4;
1872
1873 buf = kmalloc(size, GFP_KERNEL);
1874 if (!buf)
1875 return -ENOMEM;
1876
1877 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1878 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1879 cgc->cmd[7] = s->type;
1880 cgc->cmd[8] = size >> 8;
1881 cgc->cmd[9] = size & 0xff;
1882 cgc->cmd[10] = s->disckey.agid << 6;
1883
1884 ret = cdo->generic_packet(cdi, cgc);
1885 if (!ret)
1886 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1887
1888 kfree(buf);
1889 return ret;
1890}
1891
1892static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1893 struct packet_command *cgc)
1894{
1895 int ret, size = 4 + 188;
1896 u_char *buf;
1897 struct cdrom_device_ops *cdo = cdi->ops;
1898
1899 buf = kmalloc(size, GFP_KERNEL);
1900 if (!buf)
1901 return -ENOMEM;
1902
1903 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1904 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1905 cgc->cmd[7] = s->type;
1906 cgc->cmd[9] = cgc->buflen & 0xff;
1907
1908 ret = cdo->generic_packet(cdi, cgc);
1909 if (ret)
1910 goto out;
1911
1912 s->bca.len = buf[0] << 8 | buf[1];
1913 if (s->bca.len < 12 || s->bca.len > 188) {
1914 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1915 s->bca.len);
1916 ret = -EIO;
1917 goto out;
1918 }
1919 memcpy(s->bca.value, &buf[4], s->bca.len);
1920 ret = 0;
1921out:
1922 kfree(buf);
1923 return ret;
1924}
1925
1926static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1927 struct packet_command *cgc)
1928{
1929 int ret = 0, size;
1930 u_char *buf;
1931 struct cdrom_device_ops *cdo = cdi->ops;
1932
1933 size = sizeof(s->manufact.value) + 4;
1934
1935 buf = kmalloc(size, GFP_KERNEL);
1936 if (!buf)
1937 return -ENOMEM;
1938
1939 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1940 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1941 cgc->cmd[7] = s->type;
1942 cgc->cmd[8] = size >> 8;
1943 cgc->cmd[9] = size & 0xff;
1944
1945 ret = cdo->generic_packet(cdi, cgc);
1946 if (ret)
1947 goto out;
1948
1949 s->manufact.len = buf[0] << 8 | buf[1];
1950 if (s->manufact.len < 0) {
1951 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1952 s->manufact.len);
1953 ret = -EIO;
1954 } else {
1955 if (s->manufact.len > 2048) {
1956 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1957 s->manufact.len);
1958 s->manufact.len = 2048;
1959 }
1960 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1961 }
1962
1963out:
1964 kfree(buf);
1965 return ret;
1966}
1967
1968static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1969 struct packet_command *cgc)
1970{
1971 switch (s->type) {
1972 case DVD_STRUCT_PHYSICAL:
1973 return dvd_read_physical(cdi, s, cgc);
1974
1975 case DVD_STRUCT_COPYRIGHT:
1976 return dvd_read_copyright(cdi, s, cgc);
1977
1978 case DVD_STRUCT_DISCKEY:
1979 return dvd_read_disckey(cdi, s, cgc);
1980
1981 case DVD_STRUCT_BCA:
1982 return dvd_read_bca(cdi, s, cgc);
1983
1984 case DVD_STRUCT_MANUFACT:
1985 return dvd_read_manufact(cdi, s, cgc);
1986
1987 default:
1988 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1989 s->type);
1990 return -EINVAL;
1991 }
1992}
1993
1994int cdrom_mode_sense(struct cdrom_device_info *cdi,
1995 struct packet_command *cgc,
1996 int page_code, int page_control)
1997{
1998 struct cdrom_device_ops *cdo = cdi->ops;
1999
2000 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2001
2002 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
2003 cgc->cmd[2] = page_code | (page_control << 6);
2004 cgc->cmd[7] = cgc->buflen >> 8;
2005 cgc->cmd[8] = cgc->buflen & 0xff;
2006 cgc->data_direction = CGC_DATA_READ;
2007 return cdo->generic_packet(cdi, cgc);
2008}
2009
2010int cdrom_mode_select(struct cdrom_device_info *cdi,
2011 struct packet_command *cgc)
2012{
2013 struct cdrom_device_ops *cdo = cdi->ops;
2014
2015 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2016 memset(cgc->buffer, 0, 2);
2017 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2018 cgc->cmd[1] = 0x10; /* PF */
2019 cgc->cmd[7] = cgc->buflen >> 8;
2020 cgc->cmd[8] = cgc->buflen & 0xff;
2021 cgc->data_direction = CGC_DATA_WRITE;
2022 return cdo->generic_packet(cdi, cgc);
2023}
2024
2025static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2026 struct cdrom_subchnl *subchnl, int mcn)
2027{
2028 struct cdrom_device_ops *cdo = cdi->ops;
2029 struct packet_command cgc;
2030 char buffer[32];
2031 int ret;
2032
2033 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2034 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2035 cgc.cmd[1] = 2; /* MSF addressing */
2036 cgc.cmd[2] = 0x40; /* request subQ data */
2037 cgc.cmd[3] = mcn ? 2 : 1;
2038 cgc.cmd[8] = 16;
2039
2040 if ((ret = cdo->generic_packet(cdi, &cgc)))
2041 return ret;
2042
2043 subchnl->cdsc_audiostatus = cgc.buffer[1];
2044 subchnl->cdsc_format = CDROM_MSF;
2045 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2046 subchnl->cdsc_trk = cgc.buffer[6];
2047 subchnl->cdsc_ind = cgc.buffer[7];
2048
2049 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2050 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2051 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2052 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2053 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2054 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2055
2056 return 0;
2057}
2058
2059/*
2060 * Specific READ_10 interface
2061 */
2062static int cdrom_read_cd(struct cdrom_device_info *cdi,
2063 struct packet_command *cgc, int lba,
2064 int blocksize, int nblocks)
2065{
2066 struct cdrom_device_ops *cdo = cdi->ops;
2067
2068 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2069 cgc->cmd[0] = GPCMD_READ_10;
2070 cgc->cmd[2] = (lba >> 24) & 0xff;
2071 cgc->cmd[3] = (lba >> 16) & 0xff;
2072 cgc->cmd[4] = (lba >> 8) & 0xff;
2073 cgc->cmd[5] = lba & 0xff;
2074 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2075 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2076 cgc->cmd[8] = nblocks & 0xff;
2077 cgc->buflen = blocksize * nblocks;
2078 return cdo->generic_packet(cdi, cgc);
2079}
2080
2081/* very generic interface for reading the various types of blocks */
2082static int cdrom_read_block(struct cdrom_device_info *cdi,
2083 struct packet_command *cgc,
2084 int lba, int nblocks, int format, int blksize)
2085{
2086 struct cdrom_device_ops *cdo = cdi->ops;
2087
2088 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2089 cgc->cmd[0] = GPCMD_READ_CD;
2090 /* expected sector size - cdda,mode1,etc. */
2091 cgc->cmd[1] = format << 2;
2092 /* starting address */
2093 cgc->cmd[2] = (lba >> 24) & 0xff;
2094 cgc->cmd[3] = (lba >> 16) & 0xff;
2095 cgc->cmd[4] = (lba >> 8) & 0xff;
2096 cgc->cmd[5] = lba & 0xff;
2097 /* number of blocks */
2098 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2099 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2100 cgc->cmd[8] = nblocks & 0xff;
2101 cgc->buflen = blksize * nblocks;
2102
2103 /* set the header info returned */
2104 switch (blksize) {
2105 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2106 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2107 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2108 default : cgc->cmd[9] = 0x10;
2109 }
2110
2111 return cdo->generic_packet(cdi, cgc);
2112}
2113
2114static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2115 int lba, int nframes)
2116{
2117 struct packet_command cgc;
2118 int ret = 0;
2119 int nr;
2120
2121 cdi->last_sense = 0;
2122
2123 memset(&cgc, 0, sizeof(cgc));
2124
2125 /*
2126 * start with will ra.nframes size, back down if alloc fails
2127 */
2128 nr = nframes;
2129 do {
2130 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2131 if (cgc.buffer)
2132 break;
2133
2134 nr >>= 1;
2135 } while (nr);
2136
2137 if (!nr)
2138 return -ENOMEM;
2139
2140 cgc.data_direction = CGC_DATA_READ;
2141 while (nframes > 0) {
2142 if (nr > nframes)
2143 nr = nframes;
2144
2145 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2146 if (ret)
2147 break;
2148 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2149 ret = -EFAULT;
2150 break;
2151 }
2152 ubuf += CD_FRAMESIZE_RAW * nr;
2153 nframes -= nr;
2154 lba += nr;
2155 }
2156 kfree(cgc.buffer);
2157 return ret;
2158}
2159
2160static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2161 int lba, int nframes)
2162{
2163 struct request_queue *q = cdi->disk->queue;
2164 struct request *rq;
2165 struct bio *bio;
2166 unsigned int len;
2167 int nr, ret = 0;
2168
2169 if (!q)
2170 return -ENXIO;
2171
2172 cdi->last_sense = 0;
2173
2174 while (nframes) {
2175 nr = nframes;
2176 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2177 nr = 1;
2178 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2179 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2180
2181 len = nr * CD_FRAMESIZE_RAW;
2182
2183 rq = blk_get_request(q, READ, GFP_KERNEL);
2184 if (IS_ERR(rq)) {
2185 ret = PTR_ERR(rq);
2186 break;
2187 }
2188 blk_rq_set_block_pc(rq);
2189
2190 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2191 if (ret) {
2192 blk_put_request(rq);
2193 break;
2194 }
2195
2196 rq->cmd[0] = GPCMD_READ_CD;
2197 rq->cmd[1] = 1 << 2;
2198 rq->cmd[2] = (lba >> 24) & 0xff;
2199 rq->cmd[3] = (lba >> 16) & 0xff;
2200 rq->cmd[4] = (lba >> 8) & 0xff;
2201 rq->cmd[5] = lba & 0xff;
2202 rq->cmd[6] = (nr >> 16) & 0xff;
2203 rq->cmd[7] = (nr >> 8) & 0xff;
2204 rq->cmd[8] = nr & 0xff;
2205 rq->cmd[9] = 0xf8;
2206
2207 rq->cmd_len = 12;
2208 rq->timeout = 60 * HZ;
2209 bio = rq->bio;
2210
2211 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2212 struct request_sense *s = rq->sense;
2213 ret = -EIO;
2214 cdi->last_sense = s->sense_key;
2215 }
2216
2217 if (blk_rq_unmap_user(bio))
2218 ret = -EFAULT;
2219 blk_put_request(rq);
2220
2221 if (ret)
2222 break;
2223
2224 nframes -= nr;
2225 lba += nr;
2226 ubuf += len;
2227 }
2228
2229 return ret;
2230}
2231
2232static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2233 int lba, int nframes)
2234{
2235 int ret;
2236
2237 if (cdi->cdda_method == CDDA_OLD)
2238 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2239
2240retry:
2241 /*
2242 * for anything else than success and io error, we need to retry
2243 */
2244 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2245 if (!ret || ret != -EIO)
2246 return ret;
2247
2248 /*
2249 * I've seen drives get sense 4/8/3 udma crc errors on multi
2250 * frame dma, so drop to single frame dma if we need to
2251 */
2252 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2253 pr_info("dropping to single frame dma\n");
2254 cdi->cdda_method = CDDA_BPC_SINGLE;
2255 goto retry;
2256 }
2257
2258 /*
2259 * so we have an io error of some sort with multi frame dma. if the
2260 * condition wasn't a hardware error
2261 * problems, not for any error
2262 */
2263 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2264 return ret;
2265
2266 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2267 cdi->cdda_method = CDDA_OLD;
2268 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2269}
2270
2271static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2272 void __user *argp)
2273{
2274 struct cdrom_multisession ms_info;
2275 u8 requested_format;
2276 int ret;
2277
2278 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2279
2280 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2281 return -ENOSYS;
2282
2283 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2284 return -EFAULT;
2285
2286 requested_format = ms_info.addr_format;
2287 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2288 return -EINVAL;
2289 ms_info.addr_format = CDROM_LBA;
2290
2291 ret = cdi->ops->get_last_session(cdi, &ms_info);
2292 if (ret)
2293 return ret;
2294
2295 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2296
2297 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2298 return -EFAULT;
2299
2300 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2301 return 0;
2302}
2303
2304static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2305{
2306 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2307
2308 if (!CDROM_CAN(CDC_OPEN_TRAY))
2309 return -ENOSYS;
2310 if (cdi->use_count != 1 || cdi->keeplocked)
2311 return -EBUSY;
2312 if (CDROM_CAN(CDC_LOCK)) {
2313 int ret = cdi->ops->lock_door(cdi, 0);
2314 if (ret)
2315 return ret;
2316 }
2317
2318 return cdi->ops->tray_move(cdi, 1);
2319}
2320
2321static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2322{
2323 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2324
2325 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2326 return -ENOSYS;
2327 return cdi->ops->tray_move(cdi, 0);
2328}
2329
2330static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2331 unsigned long arg)
2332{
2333 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2334
2335 if (!CDROM_CAN(CDC_OPEN_TRAY))
2336 return -ENOSYS;
2337 if (cdi->keeplocked)
2338 return -EBUSY;
2339
2340 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2341 if (arg)
2342 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2343 return 0;
2344}
2345
2346static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2347 unsigned long arg)
2348{
2349 struct cdrom_changer_info *info;
2350 int ret;
2351
2352 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2353
2354 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2355 return -ENOSYS;
2356
2357 /* cannot select disc or select current disc */
2358 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2359 return media_changed(cdi, 1);
2360
2361 if ((unsigned int)arg >= cdi->capacity)
2362 return -EINVAL;
2363
2364 info = kmalloc(sizeof(*info), GFP_KERNEL);
2365 if (!info)
2366 return -ENOMEM;
2367
2368 ret = cdrom_read_mech_status(cdi, info);
2369 if (!ret)
2370 ret = info->slots[arg].change;
2371 kfree(info);
2372 return ret;
2373}
2374
2375static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2376 unsigned long arg)
2377{
2378 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2379
2380 /*
2381 * Options need to be in sync with capability.
2382 * Too late for that, so we have to check each one separately.
2383 */
2384 switch (arg) {
2385 case CDO_USE_FFLAGS:
2386 case CDO_CHECK_TYPE:
2387 break;
2388 case CDO_LOCK:
2389 if (!CDROM_CAN(CDC_LOCK))
2390 return -ENOSYS;
2391 break;
2392 case 0:
2393 return cdi->options;
2394 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2395 default:
2396 if (!CDROM_CAN(arg))
2397 return -ENOSYS;
2398 }
2399 cdi->options |= (int) arg;
2400 return cdi->options;
2401}
2402
2403static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2404 unsigned long arg)
2405{
2406 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2407
2408 cdi->options &= ~(int) arg;
2409 return cdi->options;
2410}
2411
2412static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2413 unsigned long arg)
2414{
2415 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2416
2417 if (!CDROM_CAN(CDC_SELECT_SPEED))
2418 return -ENOSYS;
2419 return cdi->ops->select_speed(cdi, arg);
2420}
2421
2422static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2423 unsigned long arg)
2424{
2425 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2426
2427 if (!CDROM_CAN(CDC_SELECT_DISC))
2428 return -ENOSYS;
2429
2430 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2431 if ((int)arg >= cdi->capacity)
2432 return -EINVAL;
2433 }
2434
2435 /*
2436 * ->select_disc is a hook to allow a driver-specific way of
2437 * seleting disc. However, since there is no equivalent hook for
2438 * cdrom_slot_status this may not actually be useful...
2439 */
2440 if (cdi->ops->select_disc)
2441 return cdi->ops->select_disc(cdi, arg);
2442
2443 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2444 return cdrom_select_disc(cdi, arg);
2445}
2446
2447static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2448 struct block_device *bdev)
2449{
2450 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2451
2452 if (!capable(CAP_SYS_ADMIN))
2453 return -EACCES;
2454 if (!CDROM_CAN(CDC_RESET))
2455 return -ENOSYS;
2456 invalidate_bdev(bdev);
2457 return cdi->ops->reset(cdi);
2458}
2459
2460static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2461 unsigned long arg)
2462{
2463 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2464
2465 if (!CDROM_CAN(CDC_LOCK))
2466 return -EDRIVE_CANT_DO_THIS;
2467
2468 cdi->keeplocked = arg ? 1 : 0;
2469
2470 /*
2471 * Don't unlock the door on multiple opens by default, but allow
2472 * root to do so.
2473 */
2474 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2475 return -EBUSY;
2476 return cdi->ops->lock_door(cdi, arg);
2477}
2478
2479static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2480 unsigned long arg)
2481{
2482 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2483
2484 if (!capable(CAP_SYS_ADMIN))
2485 return -EACCES;
2486 debug = arg ? 1 : 0;
2487 return debug;
2488}
2489
2490static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2491{
2492 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2493 return (cdi->ops->capability & ~cdi->mask);
2494}
2495
2496/*
2497 * The following function is implemented, although very few audio
2498 * discs give Universal Product Code information, which should just be
2499 * the Medium Catalog Number on the box. Note, that the way the code
2500 * is written on the CD is /not/ uniform across all discs!
2501 */
2502static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2503 void __user *argp)
2504{
2505 struct cdrom_mcn mcn;
2506 int ret;
2507
2508 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2509
2510 if (!(cdi->ops->capability & CDC_MCN))
2511 return -ENOSYS;
2512 ret = cdi->ops->get_mcn(cdi, &mcn);
2513 if (ret)
2514 return ret;
2515
2516 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2517 return -EFAULT;
2518 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2519 return 0;
2520}
2521
2522static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2523 unsigned long arg)
2524{
2525 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2526
2527 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2528 return -ENOSYS;
2529 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2530 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2531 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2532 if (((int)arg >= cdi->capacity))
2533 return -EINVAL;
2534 return cdrom_slot_status(cdi, arg);
2535}
2536
2537/*
2538 * Ok, this is where problems start. The current interface for the
2539 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2540 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2541 * is often the case, it is also very common for CDs to have some tracks
2542 * with data, and some tracks with audio. Just because I feel like it,
2543 * I declare the following to be the best way to cope. If the CD has ANY
2544 * data tracks on it, it will be returned as a data CD. If it has any XA
2545 * tracks, I will return it as that. Now I could simplify this interface
2546 * by combining these returns with the above, but this more clearly
2547 * demonstrates the problem with the current interface. Too bad this
2548 * wasn't designed to use bitmasks... -Erik
2549 *
2550 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2551 * User level programmers might feel the ioctl is not very useful.
2552 * ---david
2553 */
2554static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2555{
2556 tracktype tracks;
2557
2558 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2559
2560 cdrom_count_tracks(cdi, &tracks);
2561 if (tracks.error)
2562 return tracks.error;
2563
2564 /* Policy mode on */
2565 if (tracks.audio > 0) {
2566 if (!tracks.data && !tracks.cdi && !tracks.xa)
2567 return CDS_AUDIO;
2568 else
2569 return CDS_MIXED;
2570 }
2571
2572 if (tracks.cdi > 0)
2573 return CDS_XA_2_2;
2574 if (tracks.xa > 0)
2575 return CDS_XA_2_1;
2576 if (tracks.data > 0)
2577 return CDS_DATA_1;
2578 /* Policy mode off */
2579
2580 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2581 return CDS_NO_INFO;
2582}
2583
2584static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2585{
2586 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2587 return cdi->capacity;
2588}
2589
2590static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2591 void __user *argp)
2592{
2593 struct cdrom_subchnl q;
2594 u8 requested, back;
2595 int ret;
2596
2597 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2598
2599 if (copy_from_user(&q, argp, sizeof(q)))
2600 return -EFAULT;
2601
2602 requested = q.cdsc_format;
2603 if (requested != CDROM_MSF && requested != CDROM_LBA)
2604 return -EINVAL;
2605 q.cdsc_format = CDROM_MSF;
2606
2607 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2608 if (ret)
2609 return ret;
2610
2611 back = q.cdsc_format; /* local copy */
2612 sanitize_format(&q.cdsc_absaddr, &back, requested);
2613 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2614
2615 if (copy_to_user(argp, &q, sizeof(q)))
2616 return -EFAULT;
2617 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2618 return 0;
2619}
2620
2621static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2622 void __user *argp)
2623{
2624 struct cdrom_tochdr header;
2625 int ret;
2626
2627 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2628
2629 if (copy_from_user(&header, argp, sizeof(header)))
2630 return -EFAULT;
2631
2632 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2633 if (ret)
2634 return ret;
2635
2636 if (copy_to_user(argp, &header, sizeof(header)))
2637 return -EFAULT;
2638 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2639 return 0;
2640}
2641
2642static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2643 void __user *argp)
2644{
2645 struct cdrom_tocentry entry;
2646 u8 requested_format;
2647 int ret;
2648
2649 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2650
2651 if (copy_from_user(&entry, argp, sizeof(entry)))
2652 return -EFAULT;
2653
2654 requested_format = entry.cdte_format;
2655 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2656 return -EINVAL;
2657 /* make interface to low-level uniform */
2658 entry.cdte_format = CDROM_MSF;
2659 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2660 if (ret)
2661 return ret;
2662 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2663
2664 if (copy_to_user(argp, &entry, sizeof(entry)))
2665 return -EFAULT;
2666 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2667 return 0;
2668}
2669
2670static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2671 void __user *argp)
2672{
2673 struct cdrom_msf msf;
2674
2675 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2676
2677 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2678 return -ENOSYS;
2679 if (copy_from_user(&msf, argp, sizeof(msf)))
2680 return -EFAULT;
2681 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2682}
2683
2684static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2685 void __user *argp)
2686{
2687 struct cdrom_ti ti;
2688 int ret;
2689
2690 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2691
2692 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2693 return -ENOSYS;
2694 if (copy_from_user(&ti, argp, sizeof(ti)))
2695 return -EFAULT;
2696
2697 ret = check_for_audio_disc(cdi, cdi->ops);
2698 if (ret)
2699 return ret;
2700 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2701}
2702static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2703 void __user *argp)
2704{
2705 struct cdrom_volctrl volume;
2706
2707 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2708
2709 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2710 return -ENOSYS;
2711 if (copy_from_user(&volume, argp, sizeof(volume)))
2712 return -EFAULT;
2713 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2714}
2715
2716static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2717 void __user *argp)
2718{
2719 struct cdrom_volctrl volume;
2720 int ret;
2721
2722 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2723
2724 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2725 return -ENOSYS;
2726
2727 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2728 if (ret)
2729 return ret;
2730
2731 if (copy_to_user(argp, &volume, sizeof(volume)))
2732 return -EFAULT;
2733 return 0;
2734}
2735
2736static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2737 unsigned int cmd)
2738{
2739 int ret;
2740
2741 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2742
2743 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2744 return -ENOSYS;
2745 ret = check_for_audio_disc(cdi, cdi->ops);
2746 if (ret)
2747 return ret;
2748 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2749}
2750
2751/*
2752 * Required when we need to use READ_10 to issue other than 2048 block
2753 * reads
2754 */
2755static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2756{
2757 struct cdrom_device_ops *cdo = cdi->ops;
2758 struct packet_command cgc;
2759 struct modesel_head mh;
2760
2761 memset(&mh, 0, sizeof(mh));
2762 mh.block_desc_length = 0x08;
2763 mh.block_length_med = (size >> 8) & 0xff;
2764 mh.block_length_lo = size & 0xff;
2765
2766 memset(&cgc, 0, sizeof(cgc));
2767 cgc.cmd[0] = 0x15;
2768 cgc.cmd[1] = 1 << 4;
2769 cgc.cmd[4] = 12;
2770 cgc.buflen = sizeof(mh);
2771 cgc.buffer = (char *) &mh;
2772 cgc.data_direction = CGC_DATA_WRITE;
2773 mh.block_desc_length = 0x08;
2774 mh.block_length_med = (size >> 8) & 0xff;
2775 mh.block_length_lo = size & 0xff;
2776
2777 return cdo->generic_packet(cdi, &cgc);
2778}
2779
2780static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2781 __u16 track, __u8 type, track_information *ti)
2782{
2783 struct cdrom_device_ops *cdo = cdi->ops;
2784 struct packet_command cgc;
2785 int ret, buflen;
2786
2787 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2788 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2789 cgc.cmd[1] = type & 3;
2790 cgc.cmd[4] = (track & 0xff00) >> 8;
2791 cgc.cmd[5] = track & 0xff;
2792 cgc.cmd[8] = 8;
2793 cgc.quiet = 1;
2794
2795 ret = cdo->generic_packet(cdi, &cgc);
2796 if (ret)
2797 return ret;
2798
2799 buflen = be16_to_cpu(ti->track_information_length) +
2800 sizeof(ti->track_information_length);
2801
2802 if (buflen > sizeof(track_information))
2803 buflen = sizeof(track_information);
2804
2805 cgc.cmd[8] = cgc.buflen = buflen;
2806 ret = cdo->generic_packet(cdi, &cgc);
2807 if (ret)
2808 return ret;
2809
2810 /* return actual fill size */
2811 return buflen;
2812}
2813
2814/* return the last written block on the CD-R media. this is for the udf
2815 file system. */
2816int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2817{
2818 struct cdrom_tocentry toc;
2819 disc_information di;
2820 track_information ti;
2821 __u32 last_track;
2822 int ret = -1, ti_size;
2823
2824 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2825 goto use_toc;
2826
2827 ret = cdrom_get_disc_info(cdi, &di);
2828 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2829 + sizeof(di.last_track_lsb)))
2830 goto use_toc;
2831
2832 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2833 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2834 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2835 if (ti_size < (int)offsetof(typeof(ti), track_start))
2836 goto use_toc;
2837
2838 /* if this track is blank, try the previous. */
2839 if (ti.blank) {
2840 if (last_track == 1)
2841 goto use_toc;
2842 last_track--;
2843 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2844 }
2845
2846 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2847 + sizeof(ti.track_size)))
2848 goto use_toc;
2849
2850 /* if last recorded field is valid, return it. */
2851 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2852 + sizeof(ti.last_rec_address))) {
2853 *last_written = be32_to_cpu(ti.last_rec_address);
2854 } else {
2855 /* make it up instead */
2856 *last_written = be32_to_cpu(ti.track_start) +
2857 be32_to_cpu(ti.track_size);
2858 if (ti.free_blocks)
2859 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2860 }
2861 return 0;
2862
2863 /* this is where we end up if the drive either can't do a
2864 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2865 it doesn't give enough information or fails. then we return
2866 the toc contents. */
2867use_toc:
2868 toc.cdte_format = CDROM_MSF;
2869 toc.cdte_track = CDROM_LEADOUT;
2870 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2871 return ret;
2872 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2873 *last_written = toc.cdte_addr.lba;
2874 return 0;
2875}
2876
2877/* return the next writable block. also for udf file system. */
2878static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2879 long *next_writable)
2880{
2881 disc_information di;
2882 track_information ti;
2883 __u16 last_track;
2884 int ret, ti_size;
2885
2886 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2887 goto use_last_written;
2888
2889 ret = cdrom_get_disc_info(cdi, &di);
2890 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2891 + sizeof(di.last_track_lsb))
2892 goto use_last_written;
2893
2894 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2895 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2896 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2897 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2898 goto use_last_written;
2899
2900 /* if this track is blank, try the previous. */
2901 if (ti.blank) {
2902 if (last_track == 1)
2903 goto use_last_written;
2904 last_track--;
2905 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2906 if (ti_size < 0)
2907 goto use_last_written;
2908 }
2909
2910 /* if next recordable address field is valid, use it. */
2911 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2912 + sizeof(ti.next_writable)) {
2913 *next_writable = be32_to_cpu(ti.next_writable);
2914 return 0;
2915 }
2916
2917use_last_written:
2918 ret = cdrom_get_last_written(cdi, next_writable);
2919 if (ret) {
2920 *next_writable = 0;
2921 return ret;
2922 } else {
2923 *next_writable += 7;
2924 return 0;
2925 }
2926}
2927
2928static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2929 void __user *arg,
2930 struct packet_command *cgc,
2931 int cmd)
2932{
2933 struct request_sense sense;
2934 struct cdrom_msf msf;
2935 int blocksize = 0, format = 0, lba;
2936 int ret;
2937
2938 switch (cmd) {
2939 case CDROMREADRAW:
2940 blocksize = CD_FRAMESIZE_RAW;
2941 break;
2942 case CDROMREADMODE1:
2943 blocksize = CD_FRAMESIZE;
2944 format = 2;
2945 break;
2946 case CDROMREADMODE2:
2947 blocksize = CD_FRAMESIZE_RAW0;
2948 break;
2949 }
2950 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2951 return -EFAULT;
2952 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2953 /* FIXME: we need upper bound checking, too!! */
2954 if (lba < 0)
2955 return -EINVAL;
2956
2957 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2958 if (cgc->buffer == NULL)
2959 return -ENOMEM;
2960
2961 memset(&sense, 0, sizeof(sense));
2962 cgc->sense = &sense;
2963 cgc->data_direction = CGC_DATA_READ;
2964 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2965 if (ret && sense.sense_key == 0x05 &&
2966 sense.asc == 0x20 &&
2967 sense.ascq == 0x00) {
2968 /*
2969 * SCSI-II devices are not required to support
2970 * READ_CD, so let's try switching block size
2971 */
2972 /* FIXME: switch back again... */
2973 ret = cdrom_switch_blocksize(cdi, blocksize);
2974 if (ret)
2975 goto out;
2976 cgc->sense = NULL;
2977 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2978 ret |= cdrom_switch_blocksize(cdi, blocksize);
2979 }
2980 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2981 ret = -EFAULT;
2982out:
2983 kfree(cgc->buffer);
2984 return ret;
2985}
2986
2987static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2988 void __user *arg)
2989{
2990 struct cdrom_read_audio ra;
2991 int lba;
2992
2993 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
2994 sizeof(ra)))
2995 return -EFAULT;
2996
2997 if (ra.addr_format == CDROM_MSF)
2998 lba = msf_to_lba(ra.addr.msf.minute,
2999 ra.addr.msf.second,
3000 ra.addr.msf.frame);
3001 else if (ra.addr_format == CDROM_LBA)
3002 lba = ra.addr.lba;
3003 else
3004 return -EINVAL;
3005
3006 /* FIXME: we need upper bound checking, too!! */
3007 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3008 return -EINVAL;
3009
3010 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3011}
3012
3013static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3014 void __user *arg)
3015{
3016 int ret;
3017 struct cdrom_subchnl q;
3018 u_char requested, back;
3019 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3020 return -EFAULT;
3021 requested = q.cdsc_format;
3022 if (!((requested == CDROM_MSF) ||
3023 (requested == CDROM_LBA)))
3024 return -EINVAL;
3025 q.cdsc_format = CDROM_MSF;
3026 ret = cdrom_read_subchannel(cdi, &q, 0);
3027 if (ret)
3028 return ret;
3029 back = q.cdsc_format; /* local copy */
3030 sanitize_format(&q.cdsc_absaddr, &back, requested);
3031 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3032 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3033 return -EFAULT;
3034 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3035 return 0;
3036}
3037
3038static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3039 void __user *arg,
3040 struct packet_command *cgc)
3041{
3042 struct cdrom_device_ops *cdo = cdi->ops;
3043 struct cdrom_msf msf;
3044 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3045 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3046 return -EFAULT;
3047 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3048 cgc->cmd[3] = msf.cdmsf_min0;
3049 cgc->cmd[4] = msf.cdmsf_sec0;
3050 cgc->cmd[5] = msf.cdmsf_frame0;
3051 cgc->cmd[6] = msf.cdmsf_min1;
3052 cgc->cmd[7] = msf.cdmsf_sec1;
3053 cgc->cmd[8] = msf.cdmsf_frame1;
3054 cgc->data_direction = CGC_DATA_NONE;
3055 return cdo->generic_packet(cdi, cgc);
3056}
3057
3058static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3059 void __user *arg,
3060 struct packet_command *cgc)
3061{
3062 struct cdrom_device_ops *cdo = cdi->ops;
3063 struct cdrom_blk blk;
3064 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3065 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3066 return -EFAULT;
3067 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3068 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3069 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3070 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3071 cgc->cmd[5] = blk.from & 0xff;
3072 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3073 cgc->cmd[8] = blk.len & 0xff;
3074 cgc->data_direction = CGC_DATA_NONE;
3075 return cdo->generic_packet(cdi, cgc);
3076}
3077
3078static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3079 void __user *arg,
3080 struct packet_command *cgc,
3081 unsigned int cmd)
3082{
3083 struct cdrom_volctrl volctrl;
3084 unsigned char buffer[32];
3085 char mask[sizeof(buffer)];
3086 unsigned short offset;
3087 int ret;
3088
3089 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3090
3091 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3092 sizeof(volctrl)))
3093 return -EFAULT;
3094
3095 cgc->buffer = buffer;
3096 cgc->buflen = 24;
3097 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3098 if (ret)
3099 return ret;
3100
3101 /* originally the code depended on buffer[1] to determine
3102 how much data is available for transfer. buffer[1] is
3103 unfortunately ambigious and the only reliable way seem
3104 to be to simply skip over the block descriptor... */
3105 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3106
3107 if (offset + 16 > sizeof(buffer))
3108 return -E2BIG;
3109
3110 if (offset + 16 > cgc->buflen) {
3111 cgc->buflen = offset + 16;
3112 ret = cdrom_mode_sense(cdi, cgc,
3113 GPMODE_AUDIO_CTL_PAGE, 0);
3114 if (ret)
3115 return ret;
3116 }
3117
3118 /* sanity check */
3119 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3120 buffer[offset + 1] < 14)
3121 return -EINVAL;
3122
3123 /* now we have the current volume settings. if it was only
3124 a CDROMVOLREAD, return these values */
3125 if (cmd == CDROMVOLREAD) {
3126 volctrl.channel0 = buffer[offset+9];
3127 volctrl.channel1 = buffer[offset+11];
3128 volctrl.channel2 = buffer[offset+13];
3129 volctrl.channel3 = buffer[offset+15];
3130 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3131 sizeof(volctrl)))
3132 return -EFAULT;
3133 return 0;
3134 }
3135
3136 /* get the volume mask */
3137 cgc->buffer = mask;
3138 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3139 if (ret)
3140 return ret;
3141
3142 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3143 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3144 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3145 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3146
3147 /* set volume */
3148 cgc->buffer = buffer + offset - 8;
3149 memset(cgc->buffer, 0, 8);
3150 return cdrom_mode_select(cdi, cgc);
3151}
3152
3153static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3154 struct packet_command *cgc,
3155 int cmd)
3156{
3157 struct cdrom_device_ops *cdo = cdi->ops;
3158 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3159 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3160 cgc->cmd[1] = 1;
3161 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3162 cgc->data_direction = CGC_DATA_NONE;
3163 return cdo->generic_packet(cdi, cgc);
3164}
3165
3166static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3167 struct packet_command *cgc,
3168 int cmd)
3169{
3170 struct cdrom_device_ops *cdo = cdi->ops;
3171 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3172 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3173 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3174 cgc->data_direction = CGC_DATA_NONE;
3175 return cdo->generic_packet(cdi, cgc);
3176}
3177
3178static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3179 void __user *arg,
3180 struct packet_command *cgc)
3181{
3182 int ret;
3183 dvd_struct *s;
3184 int size = sizeof(dvd_struct);
3185
3186 if (!CDROM_CAN(CDC_DVD))
3187 return -ENOSYS;
3188
3189 s = memdup_user(arg, size);
3190 if (IS_ERR(s))
3191 return PTR_ERR(s);
3192
3193 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3194
3195 ret = dvd_read_struct(cdi, s, cgc);
3196 if (ret)
3197 goto out;
3198
3199 if (copy_to_user(arg, s, size))
3200 ret = -EFAULT;
3201out:
3202 kfree(s);
3203 return ret;
3204}
3205
3206static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3207 void __user *arg)
3208{
3209 int ret;
3210 dvd_authinfo ai;
3211 if (!CDROM_CAN(CDC_DVD))
3212 return -ENOSYS;
3213 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3214 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3215 return -EFAULT;
3216 ret = dvd_do_auth(cdi, &ai);
3217 if (ret)
3218 return ret;
3219 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3220 return -EFAULT;
3221 return 0;
3222}
3223
3224static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3225 void __user *arg)
3226{
3227 int ret;
3228 long next = 0;
3229 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3230 ret = cdrom_get_next_writable(cdi, &next);
3231 if (ret)
3232 return ret;
3233 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3234 return -EFAULT;
3235 return 0;
3236}
3237
3238static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3239 void __user *arg)
3240{
3241 int ret;
3242 long last = 0;
3243 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3244 ret = cdrom_get_last_written(cdi, &last);
3245 if (ret)
3246 return ret;
3247 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3248 return -EFAULT;
3249 return 0;
3250}
3251
3252static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3253 unsigned long arg)
3254{
3255 struct packet_command cgc;
3256 void __user *userptr = (void __user *)arg;
3257
3258 memset(&cgc, 0, sizeof(cgc));
3259
3260 /* build a unified command and queue it through
3261 cdo->generic_packet() */
3262 switch (cmd) {
3263 case CDROMREADRAW:
3264 case CDROMREADMODE1:
3265 case CDROMREADMODE2:
3266 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3267 case CDROMREADAUDIO:
3268 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3269 case CDROMSUBCHNL:
3270 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3271 case CDROMPLAYMSF:
3272 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3273 case CDROMPLAYBLK:
3274 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3275 case CDROMVOLCTRL:
3276 case CDROMVOLREAD:
3277 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3278 case CDROMSTART:
3279 case CDROMSTOP:
3280 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3281 case CDROMPAUSE:
3282 case CDROMRESUME:
3283 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3284 case DVD_READ_STRUCT:
3285 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3286 case DVD_AUTH:
3287 return mmc_ioctl_dvd_auth(cdi, userptr);
3288 case CDROM_NEXT_WRITABLE:
3289 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3290 case CDROM_LAST_WRITTEN:
3291 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3292 }
3293
3294 return -ENOTTY;
3295}
3296
3297/*
3298 * Just about every imaginable ioctl is supported in the Uniform layer
3299 * these days.
3300 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3301 */
3302int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3303 fmode_t mode, unsigned int cmd, unsigned long arg)
3304{
3305 void __user *argp = (void __user *)arg;
3306 int ret;
3307
3308 /*
3309 * Try the generic SCSI command ioctl's first.
3310 */
3311 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3312 if (ret != -ENOTTY)
3313 return ret;
3314
3315 switch (cmd) {
3316 case CDROMMULTISESSION:
3317 return cdrom_ioctl_multisession(cdi, argp);
3318 case CDROMEJECT:
3319 return cdrom_ioctl_eject(cdi);
3320 case CDROMCLOSETRAY:
3321 return cdrom_ioctl_closetray(cdi);
3322 case CDROMEJECT_SW:
3323 return cdrom_ioctl_eject_sw(cdi, arg);
3324 case CDROM_MEDIA_CHANGED:
3325 return cdrom_ioctl_media_changed(cdi, arg);
3326 case CDROM_SET_OPTIONS:
3327 return cdrom_ioctl_set_options(cdi, arg);
3328 case CDROM_CLEAR_OPTIONS:
3329 return cdrom_ioctl_clear_options(cdi, arg);
3330 case CDROM_SELECT_SPEED:
3331 return cdrom_ioctl_select_speed(cdi, arg);
3332 case CDROM_SELECT_DISC:
3333 return cdrom_ioctl_select_disc(cdi, arg);
3334 case CDROMRESET:
3335 return cdrom_ioctl_reset(cdi, bdev);
3336 case CDROM_LOCKDOOR:
3337 return cdrom_ioctl_lock_door(cdi, arg);
3338 case CDROM_DEBUG:
3339 return cdrom_ioctl_debug(cdi, arg);
3340 case CDROM_GET_CAPABILITY:
3341 return cdrom_ioctl_get_capability(cdi);
3342 case CDROM_GET_MCN:
3343 return cdrom_ioctl_get_mcn(cdi, argp);
3344 case CDROM_DRIVE_STATUS:
3345 return cdrom_ioctl_drive_status(cdi, arg);
3346 case CDROM_DISC_STATUS:
3347 return cdrom_ioctl_disc_status(cdi);
3348 case CDROM_CHANGER_NSLOTS:
3349 return cdrom_ioctl_changer_nslots(cdi);
3350 }
3351
3352 /*
3353 * Use the ioctls that are implemented through the generic_packet()
3354 * interface. this may look at bit funny, but if -ENOTTY is
3355 * returned that particular ioctl is not implemented and we
3356 * let it go through the device specific ones.
3357 */
3358 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3359 ret = mmc_ioctl(cdi, cmd, arg);
3360 if (ret != -ENOTTY)
3361 return ret;
3362 }
3363
3364 /*
3365 * Note: most of the cd_dbg() calls are commented out here,
3366 * because they fill up the sys log when CD players poll
3367 * the drive.
3368 */
3369 switch (cmd) {
3370 case CDROMSUBCHNL:
3371 return cdrom_ioctl_get_subchnl(cdi, argp);
3372 case CDROMREADTOCHDR:
3373 return cdrom_ioctl_read_tochdr(cdi, argp);
3374 case CDROMREADTOCENTRY:
3375 return cdrom_ioctl_read_tocentry(cdi, argp);
3376 case CDROMPLAYMSF:
3377 return cdrom_ioctl_play_msf(cdi, argp);
3378 case CDROMPLAYTRKIND:
3379 return cdrom_ioctl_play_trkind(cdi, argp);
3380 case CDROMVOLCTRL:
3381 return cdrom_ioctl_volctrl(cdi, argp);
3382 case CDROMVOLREAD:
3383 return cdrom_ioctl_volread(cdi, argp);
3384 case CDROMSTART:
3385 case CDROMSTOP:
3386 case CDROMPAUSE:
3387 case CDROMRESUME:
3388 return cdrom_ioctl_audioctl(cdi, cmd);
3389 }
3390
3391 return -ENOSYS;
3392}
3393
3394EXPORT_SYMBOL(cdrom_get_last_written);
3395EXPORT_SYMBOL(register_cdrom);
3396EXPORT_SYMBOL(unregister_cdrom);
3397EXPORT_SYMBOL(cdrom_open);
3398EXPORT_SYMBOL(cdrom_release);
3399EXPORT_SYMBOL(cdrom_ioctl);
3400EXPORT_SYMBOL(cdrom_media_changed);
3401EXPORT_SYMBOL(cdrom_number_of_slots);
3402EXPORT_SYMBOL(cdrom_mode_select);
3403EXPORT_SYMBOL(cdrom_mode_sense);
3404EXPORT_SYMBOL(init_cdrom_command);
3405EXPORT_SYMBOL(cdrom_get_media_event);
3406
3407#ifdef CONFIG_SYSCTL
3408
3409#define CDROM_STR_SIZE 1000
3410
3411static struct cdrom_sysctl_settings {
3412 char info[CDROM_STR_SIZE]; /* general info */
3413 int autoclose; /* close tray upon mount, etc */
3414 int autoeject; /* eject on umount */
3415 int debug; /* turn on debugging messages */
3416 int lock; /* lock the door on device open */
3417 int check; /* check media type */
3418} cdrom_sysctl_settings;
3419
3420enum cdrom_print_option {
3421 CTL_NAME,
3422 CTL_SPEED,
3423 CTL_SLOTS,
3424 CTL_CAPABILITY
3425};
3426
3427static int cdrom_print_info(const char *header, int val, char *info,
3428 int *pos, enum cdrom_print_option option)
3429{
3430 const int max_size = sizeof(cdrom_sysctl_settings.info);
3431 struct cdrom_device_info *cdi;
3432 int ret;
3433
3434 ret = scnprintf(info + *pos, max_size - *pos, header);
3435 if (!ret)
3436 return 1;
3437
3438 *pos += ret;
3439
3440 list_for_each_entry(cdi, &cdrom_list, list) {
3441 switch (option) {
3442 case CTL_NAME:
3443 ret = scnprintf(info + *pos, max_size - *pos,
3444 "\t%s", cdi->name);
3445 break;
3446 case CTL_SPEED:
3447 ret = scnprintf(info + *pos, max_size - *pos,
3448 "\t%d", cdi->speed);
3449 break;
3450 case CTL_SLOTS:
3451 ret = scnprintf(info + *pos, max_size - *pos,
3452 "\t%d", cdi->capacity);
3453 break;
3454 case CTL_CAPABILITY:
3455 ret = scnprintf(info + *pos, max_size - *pos,
3456 "\t%d", CDROM_CAN(val) != 0);
3457 break;
3458 default:
3459 pr_info("invalid option%d\n", option);
3460 return 1;
3461 }
3462 if (!ret)
3463 return 1;
3464 *pos += ret;
3465 }
3466
3467 return 0;
3468}
3469
3470static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3471 void __user *buffer, size_t *lenp, loff_t *ppos)
3472{
3473 int pos;
3474 char *info = cdrom_sysctl_settings.info;
3475 const int max_size = sizeof(cdrom_sysctl_settings.info);
3476
3477 if (!*lenp || (*ppos && !write)) {
3478 *lenp = 0;
3479 return 0;
3480 }
3481
3482 mutex_lock(&cdrom_mutex);
3483
3484 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3485
3486 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3487 goto done;
3488 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3489 goto done;
3490 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3491 goto done;
3492 if (cdrom_print_info("\nCan close tray:\t",
3493 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3494 goto done;
3495 if (cdrom_print_info("\nCan open tray:\t",
3496 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3497 goto done;
3498 if (cdrom_print_info("\nCan lock tray:\t",
3499 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3500 goto done;
3501 if (cdrom_print_info("\nCan change speed:",
3502 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3503 goto done;
3504 if (cdrom_print_info("\nCan select disk:",
3505 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3506 goto done;
3507 if (cdrom_print_info("\nCan read multisession:",
3508 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3509 goto done;
3510 if (cdrom_print_info("\nCan read MCN:\t",
3511 CDC_MCN, info, &pos, CTL_CAPABILITY))
3512 goto done;
3513 if (cdrom_print_info("\nReports media changed:",
3514 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3515 goto done;
3516 if (cdrom_print_info("\nCan play audio:\t",
3517 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3518 goto done;
3519 if (cdrom_print_info("\nCan write CD-R:\t",
3520 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3521 goto done;
3522 if (cdrom_print_info("\nCan write CD-RW:",
3523 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3524 goto done;
3525 if (cdrom_print_info("\nCan read DVD:\t",
3526 CDC_DVD, info, &pos, CTL_CAPABILITY))
3527 goto done;
3528 if (cdrom_print_info("\nCan write DVD-R:",
3529 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3530 goto done;
3531 if (cdrom_print_info("\nCan write DVD-RAM:",
3532 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3533 goto done;
3534 if (cdrom_print_info("\nCan read MRW:\t",
3535 CDC_MRW, info, &pos, CTL_CAPABILITY))
3536 goto done;
3537 if (cdrom_print_info("\nCan write MRW:\t",
3538 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3539 goto done;
3540 if (cdrom_print_info("\nCan write RAM:\t",
3541 CDC_RAM, info, &pos, CTL_CAPABILITY))
3542 goto done;
3543 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3544 goto done;
3545doit:
3546 mutex_unlock(&cdrom_mutex);
3547 return proc_dostring(ctl, write, buffer, lenp, ppos);
3548done:
3549 pr_info("info buffer too small\n");
3550 goto doit;
3551}
3552
3553/* Unfortunately, per device settings are not implemented through
3554 procfs/sysctl yet. When they are, this will naturally disappear. For now
3555 just update all drives. Later this will become the template on which
3556 new registered drives will be based. */
3557static void cdrom_update_settings(void)
3558{
3559 struct cdrom_device_info *cdi;
3560
3561 mutex_lock(&cdrom_mutex);
3562 list_for_each_entry(cdi, &cdrom_list, list) {
3563 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3564 cdi->options |= CDO_AUTO_CLOSE;
3565 else if (!autoclose)
3566 cdi->options &= ~CDO_AUTO_CLOSE;
3567 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3568 cdi->options |= CDO_AUTO_EJECT;
3569 else if (!autoeject)
3570 cdi->options &= ~CDO_AUTO_EJECT;
3571 if (lockdoor && CDROM_CAN(CDC_LOCK))
3572 cdi->options |= CDO_LOCK;
3573 else if (!lockdoor)
3574 cdi->options &= ~CDO_LOCK;
3575 if (check_media_type)
3576 cdi->options |= CDO_CHECK_TYPE;
3577 else
3578 cdi->options &= ~CDO_CHECK_TYPE;
3579 }
3580 mutex_unlock(&cdrom_mutex);
3581}
3582
3583static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3584 void __user *buffer, size_t *lenp, loff_t *ppos)
3585{
3586 int ret;
3587
3588 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3589
3590 if (write) {
3591
3592 /* we only care for 1 or 0. */
3593 autoclose = !!cdrom_sysctl_settings.autoclose;
3594 autoeject = !!cdrom_sysctl_settings.autoeject;
3595 debug = !!cdrom_sysctl_settings.debug;
3596 lockdoor = !!cdrom_sysctl_settings.lock;
3597 check_media_type = !!cdrom_sysctl_settings.check;
3598
3599 /* update the option flags according to the changes. we
3600 don't have per device options through sysctl yet,
3601 but we will have and then this will disappear. */
3602 cdrom_update_settings();
3603 }
3604
3605 return ret;
3606}
3607
3608/* Place files in /proc/sys/dev/cdrom */
3609static struct ctl_table cdrom_table[] = {
3610 {
3611 .procname = "info",
3612 .data = &cdrom_sysctl_settings.info,
3613 .maxlen = CDROM_STR_SIZE,
3614 .mode = 0444,
3615 .proc_handler = cdrom_sysctl_info,
3616 },
3617 {
3618 .procname = "autoclose",
3619 .data = &cdrom_sysctl_settings.autoclose,
3620 .maxlen = sizeof(int),
3621 .mode = 0644,
3622 .proc_handler = cdrom_sysctl_handler,
3623 },
3624 {
3625 .procname = "autoeject",
3626 .data = &cdrom_sysctl_settings.autoeject,
3627 .maxlen = sizeof(int),
3628 .mode = 0644,
3629 .proc_handler = cdrom_sysctl_handler,
3630 },
3631 {
3632 .procname = "debug",
3633 .data = &cdrom_sysctl_settings.debug,
3634 .maxlen = sizeof(int),
3635 .mode = 0644,
3636 .proc_handler = cdrom_sysctl_handler,
3637 },
3638 {
3639 .procname = "lock",
3640 .data = &cdrom_sysctl_settings.lock,
3641 .maxlen = sizeof(int),
3642 .mode = 0644,
3643 .proc_handler = cdrom_sysctl_handler,
3644 },
3645 {
3646 .procname = "check_media",
3647 .data = &cdrom_sysctl_settings.check,
3648 .maxlen = sizeof(int),
3649 .mode = 0644,
3650 .proc_handler = cdrom_sysctl_handler
3651 },
3652 { }
3653};
3654
3655static struct ctl_table cdrom_cdrom_table[] = {
3656 {
3657 .procname = "cdrom",
3658 .maxlen = 0,
3659 .mode = 0555,
3660 .child = cdrom_table,
3661 },
3662 { }
3663};
3664
3665/* Make sure that /proc/sys/dev is there */
3666static struct ctl_table cdrom_root_table[] = {
3667 {
3668 .procname = "dev",
3669 .maxlen = 0,
3670 .mode = 0555,
3671 .child = cdrom_cdrom_table,
3672 },
3673 { }
3674};
3675static struct ctl_table_header *cdrom_sysctl_header;
3676
3677static void cdrom_sysctl_register(void)
3678{
3679 static int initialized;
3680
3681 if (initialized == 1)
3682 return;
3683
3684 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3685
3686 /* set the defaults */
3687 cdrom_sysctl_settings.autoclose = autoclose;
3688 cdrom_sysctl_settings.autoeject = autoeject;
3689 cdrom_sysctl_settings.debug = debug;
3690 cdrom_sysctl_settings.lock = lockdoor;
3691 cdrom_sysctl_settings.check = check_media_type;
3692
3693 initialized = 1;
3694}
3695
3696static void cdrom_sysctl_unregister(void)
3697{
3698 if (cdrom_sysctl_header)
3699 unregister_sysctl_table(cdrom_sysctl_header);
3700}
3701
3702#else /* CONFIG_SYSCTL */
3703
3704static void cdrom_sysctl_register(void)
3705{
3706}
3707
3708static void cdrom_sysctl_unregister(void)
3709{
3710}
3711
3712#endif /* CONFIG_SYSCTL */
3713
3714static int __init cdrom_init(void)
3715{
3716 cdrom_sysctl_register();
3717
3718 return 0;
3719}
3720
3721static void __exit cdrom_exit(void)
3722{
3723 pr_info("Uniform CD-ROM driver unloaded\n");
3724 cdrom_sysctl_unregister();
3725}
3726
3727module_init(cdrom_init);
3728module_exit(cdrom_exit);
3729MODULE_LICENSE("GPL");