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