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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 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/atomic.h>
269#include <linux/module.h>
270#include <linux/fs.h>
271#include <linux/major.h>
272#include <linux/types.h>
273#include <linux/errno.h>
274#include <linux/kernel.h>
275#include <linux/mm.h>
276#include <linux/slab.h>
277#include <linux/cdrom.h>
278#include <linux/sysctl.h>
279#include <linux/proc_fs.h>
280#include <linux/blkpg.h>
281#include <linux/init.h>
282#include <linux/fcntl.h>
283#include <linux/blkdev.h>
284#include <linux/times.h>
285#include <linux/uaccess.h>
286#include <scsi/scsi_common.h>
287#include <scsi/scsi_request.h>
288
289/* used to tell the module to turn on full debugging messages */
290static bool debug;
291/* default compatibility mode */
292static bool autoclose=1;
293static bool autoeject;
294static bool lockdoor = 1;
295/* will we ever get to use this... sigh. */
296static bool check_media_type;
297/* automatically restart mrw format */
298static bool mrw_format_restart = 1;
299module_param(debug, bool, 0);
300module_param(autoclose, bool, 0);
301module_param(autoeject, bool, 0);
302module_param(lockdoor, bool, 0);
303module_param(check_media_type, bool, 0);
304module_param(mrw_format_restart, bool, 0);
305
306static DEFINE_MUTEX(cdrom_mutex);
307
308static const char *mrw_format_status[] = {
309 "not mrw",
310 "bgformat inactive",
311 "bgformat active",
312 "mrw complete",
313};
314
315static const char *mrw_address_space[] = { "DMA", "GAA" };
316
317#if (ERRLOGMASK != CD_NOTHING)
318#define cd_dbg(type, fmt, ...) \
319do { \
320 if ((ERRLOGMASK & type) || debug == 1) \
321 pr_debug(fmt, ##__VA_ARGS__); \
322} while (0)
323#else
324#define cd_dbg(type, fmt, ...) \
325do { \
326 if (0 && (ERRLOGMASK & type) || debug == 1) \
327 pr_debug(fmt, ##__VA_ARGS__); \
328} while (0)
329#endif
330
331/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
332 a lot of places. This macro makes the code more clear. */
333#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
334
335/*
336 * Another popular OS uses 7 seconds as the hard timeout for default
337 * commands, so it is a good choice for us as well.
338 */
339#define CDROM_DEF_TIMEOUT (7 * HZ)
340
341/* Not-exported routines. */
342
343static void cdrom_sysctl_register(void);
344
345static LIST_HEAD(cdrom_list);
346
347int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
348 struct packet_command *cgc)
349{
350 if (cgc->sshdr) {
351 cgc->sshdr->sense_key = 0x05;
352 cgc->sshdr->asc = 0x20;
353 cgc->sshdr->ascq = 0x00;
354 }
355
356 cgc->stat = -EIO;
357 return -EIO;
358}
359EXPORT_SYMBOL(cdrom_dummy_generic_packet);
360
361static int cdrom_flush_cache(struct cdrom_device_info *cdi)
362{
363 struct packet_command cgc;
364
365 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
366 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
367
368 cgc.timeout = 5 * 60 * HZ;
369
370 return cdi->ops->generic_packet(cdi, &cgc);
371}
372
373/* requires CD R/RW */
374static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
375 disc_information *di)
376{
377 const struct cdrom_device_ops *cdo = cdi->ops;
378 struct packet_command cgc;
379 int ret, buflen;
380
381 /* set up command and get the disc info */
382 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
383 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
384 cgc.cmd[8] = cgc.buflen = 2;
385 cgc.quiet = 1;
386
387 ret = cdo->generic_packet(cdi, &cgc);
388 if (ret)
389 return ret;
390
391 /* not all drives have the same disc_info length, so requeue
392 * packet with the length the drive tells us it can supply
393 */
394 buflen = be16_to_cpu(di->disc_information_length) +
395 sizeof(di->disc_information_length);
396
397 if (buflen > sizeof(disc_information))
398 buflen = sizeof(disc_information);
399
400 cgc.cmd[8] = cgc.buflen = buflen;
401 ret = cdo->generic_packet(cdi, &cgc);
402 if (ret)
403 return ret;
404
405 /* return actual fill size */
406 return buflen;
407}
408
409/* This macro makes sure we don't have to check on cdrom_device_ops
410 * existence in the run-time routines below. Change_capability is a
411 * hack to have the capability flags defined const, while we can still
412 * change it here without gcc complaining at every line.
413 */
414#define ENSURE(cdo, call, bits) \
415do { \
416 if (cdo->call == NULL) \
417 WARN_ON_ONCE((cdo)->capability & (bits)); \
418} while (0)
419
420/*
421 * the first prototypes used 0x2c as the page code for the mrw mode page,
422 * subsequently this was changed to 0x03. probe the one used by this drive
423 */
424static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
425{
426 struct packet_command cgc;
427 char buffer[16];
428
429 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
430
431 cgc.timeout = HZ;
432 cgc.quiet = 1;
433
434 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
435 cdi->mrw_mode_page = MRW_MODE_PC;
436 return 0;
437 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
438 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
439 return 0;
440 }
441
442 return 1;
443}
444
445static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
446{
447 struct packet_command cgc;
448 struct mrw_feature_desc *mfd;
449 unsigned char buffer[16];
450 int ret;
451
452 *write = 0;
453
454 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
455
456 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
457 cgc.cmd[3] = CDF_MRW;
458 cgc.cmd[8] = sizeof(buffer);
459 cgc.quiet = 1;
460
461 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
462 return ret;
463
464 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
465 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
466 return 1;
467 *write = mfd->write;
468
469 if ((ret = cdrom_mrw_probe_pc(cdi))) {
470 *write = 0;
471 return ret;
472 }
473
474 return 0;
475}
476
477static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
478{
479 struct packet_command cgc;
480 unsigned char buffer[12];
481 int ret;
482
483 pr_info("%sstarting format\n", cont ? "Re" : "");
484
485 /*
486 * FmtData bit set (bit 4), format type is 1
487 */
488 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
489 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
490 cgc.cmd[1] = (1 << 4) | 1;
491
492 cgc.timeout = 5 * 60 * HZ;
493
494 /*
495 * 4 byte format list header, 8 byte format list descriptor
496 */
497 buffer[1] = 1 << 1;
498 buffer[3] = 8;
499
500 /*
501 * nr_blocks field
502 */
503 buffer[4] = 0xff;
504 buffer[5] = 0xff;
505 buffer[6] = 0xff;
506 buffer[7] = 0xff;
507
508 buffer[8] = 0x24 << 2;
509 buffer[11] = cont;
510
511 ret = cdi->ops->generic_packet(cdi, &cgc);
512 if (ret)
513 pr_info("bgformat failed\n");
514
515 return ret;
516}
517
518static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
519{
520 struct packet_command cgc;
521
522 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
523 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
524
525 /*
526 * Session = 1, Track = 0
527 */
528 cgc.cmd[1] = !!immed;
529 cgc.cmd[2] = 1 << 1;
530
531 cgc.timeout = 5 * 60 * HZ;
532
533 return cdi->ops->generic_packet(cdi, &cgc);
534}
535
536static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
537{
538 disc_information di;
539 int ret;
540
541 ret = cdrom_get_disc_info(cdi, &di);
542 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
543 return 1;
544
545 ret = 0;
546 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
547 pr_info("issuing MRW background format suspend\n");
548 ret = cdrom_mrw_bgformat_susp(cdi, 0);
549 }
550
551 if (!ret && cdi->media_written)
552 ret = cdrom_flush_cache(cdi);
553
554 return ret;
555}
556
557static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
558{
559 struct packet_command cgc;
560 struct mode_page_header *mph;
561 char buffer[16];
562 int ret, offset, size;
563
564 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
565
566 cgc.buffer = buffer;
567 cgc.buflen = sizeof(buffer);
568
569 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
570 if (ret)
571 return ret;
572
573 mph = (struct mode_page_header *)buffer;
574 offset = be16_to_cpu(mph->desc_length);
575 size = be16_to_cpu(mph->mode_data_length) + 2;
576
577 buffer[offset + 3] = space;
578 cgc.buflen = size;
579
580 ret = cdrom_mode_select(cdi, &cgc);
581 if (ret)
582 return ret;
583
584 pr_info("%s: mrw address space %s selected\n",
585 cdi->name, mrw_address_space[space]);
586 return 0;
587}
588
589int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi)
590{
591 static char banner_printed;
592 const struct cdrom_device_ops *cdo = cdi->ops;
593
594 cd_dbg(CD_OPEN, "entering register_cdrom\n");
595
596 if (cdo->open == NULL || cdo->release == NULL)
597 return -EINVAL;
598 if (!banner_printed) {
599 pr_info("Uniform CD-ROM driver " REVISION "\n");
600 banner_printed = 1;
601 cdrom_sysctl_register();
602 }
603
604 cdi->disk = disk;
605 disk->cdi = cdi;
606
607 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
608 if (cdo->check_events == NULL)
609 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
610 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
611 ENSURE(cdo, lock_door, CDC_LOCK);
612 ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
613 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
614 ENSURE(cdo, get_mcn, CDC_MCN);
615 ENSURE(cdo, reset, CDC_RESET);
616 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
617 cdi->mc_flags = 0;
618 cdi->options = CDO_USE_FFLAGS;
619
620 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
621 cdi->options |= (int) CDO_AUTO_CLOSE;
622 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
623 cdi->options |= (int) CDO_AUTO_EJECT;
624 if (lockdoor == 1)
625 cdi->options |= (int) CDO_LOCK;
626 if (check_media_type == 1)
627 cdi->options |= (int) CDO_CHECK_TYPE;
628
629 if (CDROM_CAN(CDC_MRW_W))
630 cdi->exit = cdrom_mrw_exit;
631
632 if (cdi->disk)
633 cdi->cdda_method = CDDA_BPC_FULL;
634 else
635 cdi->cdda_method = CDDA_OLD;
636
637 WARN_ON(!cdo->generic_packet);
638
639 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
640 mutex_lock(&cdrom_mutex);
641 list_add(&cdi->list, &cdrom_list);
642 mutex_unlock(&cdrom_mutex);
643 return 0;
644}
645#undef ENSURE
646
647void unregister_cdrom(struct cdrom_device_info *cdi)
648{
649 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
650
651 mutex_lock(&cdrom_mutex);
652 list_del(&cdi->list);
653 mutex_unlock(&cdrom_mutex);
654
655 if (cdi->exit)
656 cdi->exit(cdi);
657
658 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
659}
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}
687
688static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
689 struct rwrt_feature_desc *rfd)
690{
691 struct packet_command cgc;
692 char buffer[24];
693 int ret;
694
695 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
696
697 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
698 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
699 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
700 cgc.quiet = 1;
701
702 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
703 return ret;
704
705 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
706 return 0;
707}
708
709static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
710{
711 struct packet_command cgc;
712 char buffer[16];
713 __be16 *feature_code;
714 int ret;
715
716 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
717
718 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
719 cgc.cmd[3] = CDF_HWDM;
720 cgc.cmd[8] = sizeof(buffer);
721 cgc.quiet = 1;
722
723 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
724 return ret;
725
726 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
727 if (be16_to_cpu(*feature_code) == CDF_HWDM)
728 return 0;
729
730 return 1;
731}
732
733
734static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
735{
736 struct rwrt_feature_desc rfd;
737 int ret;
738
739 *write = 0;
740
741 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
742 return ret;
743
744 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
745 *write = 1;
746
747 return 0;
748}
749
750static int cdrom_media_erasable(struct cdrom_device_info *cdi)
751{
752 disc_information di;
753 int ret;
754
755 ret = cdrom_get_disc_info(cdi, &di);
756 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
757 return -1;
758
759 return di.erasable;
760}
761
762/*
763 * FIXME: check RO bit
764 */
765static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
766{
767 int ret = cdrom_media_erasable(cdi);
768
769 /*
770 * allow writable open if media info read worked and media is
771 * erasable, _or_ if it fails since not all drives support it
772 */
773 if (!ret)
774 return 1;
775
776 return 0;
777}
778
779static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
780{
781 disc_information di;
782 int ret;
783
784 /*
785 * always reset to DMA lba space on open
786 */
787 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
788 pr_err("failed setting lba address space\n");
789 return 1;
790 }
791
792 ret = cdrom_get_disc_info(cdi, &di);
793 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
794 return 1;
795
796 if (!di.erasable)
797 return 1;
798
799 /*
800 * mrw_status
801 * 0 - not MRW formatted
802 * 1 - MRW bgformat started, but not running or complete
803 * 2 - MRW bgformat in progress
804 * 3 - MRW formatting complete
805 */
806 ret = 0;
807 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
808 if (!di.mrw_status)
809 ret = 1;
810 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
811 mrw_format_restart)
812 ret = cdrom_mrw_bgformat(cdi, 1);
813
814 return ret;
815}
816
817static int mo_open_write(struct cdrom_device_info *cdi)
818{
819 struct packet_command cgc;
820 char buffer[255];
821 int ret;
822
823 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
824 cgc.quiet = 1;
825
826 /*
827 * obtain write protect information as per
828 * drivers/scsi/sd.c:sd_read_write_protect_flag
829 */
830
831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
832 if (ret)
833 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
834 if (ret) {
835 cgc.buflen = 255;
836 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
837 }
838
839 /* drive gave us no info, let the user go ahead */
840 if (ret)
841 return 0;
842
843 return buffer[3] & 0x80;
844}
845
846static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
847{
848 struct rwrt_feature_desc rfd;
849 int ret;
850
851 if ((ret = cdrom_has_defect_mgt(cdi)))
852 return ret;
853
854 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
855 return ret;
856 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
857 ret = !rfd.curr;
858
859 cd_dbg(CD_OPEN, "can open for random write\n");
860 return ret;
861}
862
863static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
864{
865 struct packet_command cgc;
866 char buffer[32];
867 int ret, mmc3_profile;
868
869 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
870
871 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
872 cgc.cmd[1] = 0;
873 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
874 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
875 cgc.quiet = 1;
876
877 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
878 mmc3_profile = 0xffff;
879 else
880 mmc3_profile = (buffer[6] << 8) | buffer[7];
881
882 cdi->mmc3_profile = mmc3_profile;
883}
884
885static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
886{
887 switch (cdi->mmc3_profile) {
888 case 0x12: /* DVD-RAM */
889 case 0x1A: /* DVD+RW */
890 case 0x43: /* BD-RE */
891 return 0;
892 default:
893 return 1;
894 }
895}
896
897/*
898 * returns 0 for ok to open write, non-0 to disallow
899 */
900static int cdrom_open_write(struct cdrom_device_info *cdi)
901{
902 int mrw, mrw_write, ram_write;
903 int ret = 1;
904
905 mrw = 0;
906 if (!cdrom_is_mrw(cdi, &mrw_write))
907 mrw = 1;
908
909 if (CDROM_CAN(CDC_MO_DRIVE))
910 ram_write = 1;
911 else
912 (void) cdrom_is_random_writable(cdi, &ram_write);
913
914 if (mrw)
915 cdi->mask &= ~CDC_MRW;
916 else
917 cdi->mask |= CDC_MRW;
918
919 if (mrw_write)
920 cdi->mask &= ~CDC_MRW_W;
921 else
922 cdi->mask |= CDC_MRW_W;
923
924 if (ram_write)
925 cdi->mask &= ~CDC_RAM;
926 else
927 cdi->mask |= CDC_RAM;
928
929 if (CDROM_CAN(CDC_MRW_W))
930 ret = cdrom_mrw_open_write(cdi);
931 else if (CDROM_CAN(CDC_DVD_RAM))
932 ret = cdrom_dvdram_open_write(cdi);
933 else if (CDROM_CAN(CDC_RAM) &&
934 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
935 ret = cdrom_ram_open_write(cdi);
936 else if (CDROM_CAN(CDC_MO_DRIVE))
937 ret = mo_open_write(cdi);
938 else if (!cdrom_is_dvd_rw(cdi))
939 ret = 0;
940
941 return ret;
942}
943
944static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
945{
946 struct packet_command cgc;
947
948 if (cdi->mmc3_profile != 0x1a) {
949 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
950 return;
951 }
952
953 if (!cdi->media_written) {
954 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
955 return;
956 }
957
958 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
959
960 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
961 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
962 cgc.timeout = 30*HZ;
963 cdi->ops->generic_packet(cdi, &cgc);
964
965 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
966 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
967 cgc.timeout = 3000*HZ;
968 cgc.quiet = 1;
969 cdi->ops->generic_packet(cdi, &cgc);
970
971 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
972 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
973 cgc.cmd[2] = 2; /* Close session */
974 cgc.quiet = 1;
975 cgc.timeout = 3000*HZ;
976 cdi->ops->generic_packet(cdi, &cgc);
977
978 cdi->media_written = 0;
979}
980
981static int cdrom_close_write(struct cdrom_device_info *cdi)
982{
983#if 0
984 return cdrom_flush_cache(cdi);
985#else
986 return 0;
987#endif
988}
989
990/* badly broken, I know. Is due for a fixup anytime. */
991static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
992{
993 struct cdrom_tochdr header;
994 struct cdrom_tocentry entry;
995 int ret, i;
996 tracks->data = 0;
997 tracks->audio = 0;
998 tracks->cdi = 0;
999 tracks->xa = 0;
1000 tracks->error = 0;
1001 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1002
1003 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1004 tracks->error = CDS_NO_INFO;
1005 return;
1006 }
1007
1008 /* Grab the TOC header so we can see how many tracks there are */
1009 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1010 if (ret) {
1011 if (ret == -ENOMEDIUM)
1012 tracks->error = CDS_NO_DISC;
1013 else
1014 tracks->error = CDS_NO_INFO;
1015 return;
1016 }
1017 /* check what type of tracks are on this disc */
1018 entry.cdte_format = CDROM_MSF;
1019 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1020 entry.cdte_track = i;
1021 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1022 tracks->error = CDS_NO_INFO;
1023 return;
1024 }
1025 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1026 if (entry.cdte_format == 0x10)
1027 tracks->cdi++;
1028 else if (entry.cdte_format == 0x20)
1029 tracks->xa++;
1030 else
1031 tracks->data++;
1032 } else {
1033 tracks->audio++;
1034 }
1035 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1036 i, entry.cdte_format, entry.cdte_ctrl);
1037 }
1038 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1039 header.cdth_trk1, tracks->audio, tracks->data,
1040 tracks->cdi, tracks->xa);
1041}
1042
1043static
1044int open_for_data(struct cdrom_device_info *cdi)
1045{
1046 int ret;
1047 const struct cdrom_device_ops *cdo = cdi->ops;
1048 tracktype tracks;
1049 cd_dbg(CD_OPEN, "entering open_for_data\n");
1050 /* Check if the driver can report drive status. If it can, we
1051 can do clever things. If it can't, well, we at least tried! */
1052 if (cdo->drive_status != NULL) {
1053 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1054 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1055 if (ret == CDS_TRAY_OPEN) {
1056 cd_dbg(CD_OPEN, "the tray is open...\n");
1057 /* can/may i close it? */
1058 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1059 cdi->options & CDO_AUTO_CLOSE) {
1060 cd_dbg(CD_OPEN, "trying to close the tray\n");
1061 ret=cdo->tray_move(cdi,0);
1062 if (ret) {
1063 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1064 /* Ignore the error from the low
1065 level driver. We don't care why it
1066 couldn't close the tray. We only care
1067 that there is no disc in the drive,
1068 since that is the _REAL_ problem here.*/
1069 ret=-ENOMEDIUM;
1070 goto clean_up_and_return;
1071 }
1072 } else {
1073 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 /* Ok, the door should be closed now.. Check again */
1078 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1079 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1080 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1081 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1082 ret=-ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 cd_dbg(CD_OPEN, "the tray is now closed\n");
1086 }
1087 /* the door should be closed now, check for the disc */
1088 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1089 if (ret!=CDS_DISC_OK) {
1090 ret = -ENOMEDIUM;
1091 goto clean_up_and_return;
1092 }
1093 }
1094 cdrom_count_tracks(cdi, &tracks);
1095 if (tracks.error == CDS_NO_DISC) {
1096 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1097 ret=-ENOMEDIUM;
1098 goto clean_up_and_return;
1099 }
1100 /* CD-Players which don't use O_NONBLOCK, workman
1101 * for example, need bit CDO_CHECK_TYPE cleared! */
1102 if (tracks.data==0) {
1103 if (cdi->options & CDO_CHECK_TYPE) {
1104 /* give people a warning shot, now that CDO_CHECK_TYPE
1105 is the default case! */
1106 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1107 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1108 (unsigned int)task_pid_nr(current));
1109 ret=-EMEDIUMTYPE;
1110 goto clean_up_and_return;
1111 }
1112 else {
1113 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1114 }
1115 }
1116
1117 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1118
1119 /* all seems well, we can open the device */
1120 ret = cdo->open(cdi, 0); /* open for data */
1121 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1122 /* After all this careful checking, we shouldn't have problems
1123 opening the device, but we don't want the device locked if
1124 this somehow fails... */
1125 if (ret) {
1126 cd_dbg(CD_OPEN, "open device failed\n");
1127 goto clean_up_and_return;
1128 }
1129 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1130 cdo->lock_door(cdi, 1);
1131 cd_dbg(CD_OPEN, "door locked\n");
1132 }
1133 cd_dbg(CD_OPEN, "device opened successfully\n");
1134 return ret;
1135
1136 /* Something failed. Try to unlock the drive, because some drivers
1137 (notably ide-cd) lock the drive after every command. This produced
1138 a nasty bug where after mount failed, the drive would remain locked!
1139 This ensures that the drive gets unlocked after a mount fails. This
1140 is a goto to avoid bloating the driver with redundant code. */
1141clean_up_and_return:
1142 cd_dbg(CD_OPEN, "open failed\n");
1143 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1144 cdo->lock_door(cdi, 0);
1145 cd_dbg(CD_OPEN, "door unlocked\n");
1146 }
1147 return ret;
1148}
1149
1150/* We use the open-option O_NONBLOCK to indicate that the
1151 * purpose of opening is only for subsequent ioctl() calls; no device
1152 * integrity checks are performed.
1153 *
1154 * We hope that all cd-player programs will adopt this convention. It
1155 * is in their own interest: device control becomes a lot easier
1156 * this way.
1157 */
1158int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1159 fmode_t mode)
1160{
1161 int ret;
1162
1163 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1164
1165 /* if this was a O_NONBLOCK open and we should honor the flags,
1166 * do a quick open without drive/disc integrity checks. */
1167 cdi->use_count++;
1168 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1169 ret = cdi->ops->open(cdi, 1);
1170 } else {
1171 ret = open_for_data(cdi);
1172 if (ret)
1173 goto err;
1174 if (CDROM_CAN(CDC_GENERIC_PACKET))
1175 cdrom_mmc3_profile(cdi);
1176 if (mode & FMODE_WRITE) {
1177 ret = -EROFS;
1178 if (cdrom_open_write(cdi))
1179 goto err_release;
1180 if (!CDROM_CAN(CDC_RAM))
1181 goto err_release;
1182 ret = 0;
1183 cdi->media_written = 0;
1184 }
1185 }
1186
1187 if (ret)
1188 goto err;
1189
1190 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1191 cdi->name, cdi->use_count);
1192 return 0;
1193err_release:
1194 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1195 cdi->ops->lock_door(cdi, 0);
1196 cd_dbg(CD_OPEN, "door unlocked\n");
1197 }
1198 cdi->ops->release(cdi);
1199err:
1200 cdi->use_count--;
1201 return ret;
1202}
1203
1204/* This code is similar to that in open_for_data. The routine is called
1205 whenever an audio play operation is requested.
1206*/
1207static int check_for_audio_disc(struct cdrom_device_info *cdi,
1208 const struct cdrom_device_ops *cdo)
1209{
1210 int ret;
1211 tracktype tracks;
1212 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1213 if (!(cdi->options & CDO_CHECK_TYPE))
1214 return 0;
1215 if (cdo->drive_status != NULL) {
1216 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1217 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1218 if (ret == CDS_TRAY_OPEN) {
1219 cd_dbg(CD_OPEN, "the tray is open...\n");
1220 /* can/may i close it? */
1221 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1222 cdi->options & CDO_AUTO_CLOSE) {
1223 cd_dbg(CD_OPEN, "trying to close the tray\n");
1224 ret=cdo->tray_move(cdi,0);
1225 if (ret) {
1226 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1227 /* Ignore the error from the low
1228 level driver. We don't care why it
1229 couldn't close the tray. We only care
1230 that there is no disc in the drive,
1231 since that is the _REAL_ problem here.*/
1232 return -ENOMEDIUM;
1233 }
1234 } else {
1235 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1236 return -ENOMEDIUM;
1237 }
1238 /* Ok, the door should be closed now.. Check again */
1239 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1240 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1241 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1242 return -ENOMEDIUM;
1243 }
1244 if (ret!=CDS_DISC_OK) {
1245 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1246 return -EIO;
1247 }
1248 cd_dbg(CD_OPEN, "the tray is now closed\n");
1249 }
1250 }
1251 cdrom_count_tracks(cdi, &tracks);
1252 if (tracks.error)
1253 return(tracks.error);
1254
1255 if (tracks.audio==0)
1256 return -EMEDIUMTYPE;
1257
1258 return 0;
1259}
1260
1261void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1262{
1263 const struct cdrom_device_ops *cdo = cdi->ops;
1264 int opened_for_data;
1265
1266 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1267
1268 if (cdi->use_count > 0)
1269 cdi->use_count--;
1270
1271 if (cdi->use_count == 0) {
1272 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1273 cdi->name);
1274 cdrom_dvd_rw_close_write(cdi);
1275
1276 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1277 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1278 cdo->lock_door(cdi, 0);
1279 }
1280 }
1281
1282 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1283 !(mode & FMODE_NDELAY);
1284
1285 /*
1286 * flush cache on last write release
1287 */
1288 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1289 cdrom_close_write(cdi);
1290
1291 cdo->release(cdi);
1292 if (cdi->use_count == 0) { /* last process that closes dev*/
1293 if (opened_for_data &&
1294 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1295 cdo->tray_move(cdi, 1);
1296 }
1297}
1298
1299static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1300 struct cdrom_changer_info *buf)
1301{
1302 struct packet_command cgc;
1303 const struct cdrom_device_ops *cdo = cdi->ops;
1304 int length;
1305
1306 /*
1307 * Sanyo changer isn't spec compliant (doesn't use regular change
1308 * LOAD_UNLOAD command, and it doesn't implement the mech status
1309 * command below
1310 */
1311 if (cdi->sanyo_slot) {
1312 buf->hdr.nslots = 3;
1313 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1314 for (length = 0; length < 3; length++) {
1315 buf->slots[length].disc_present = 1;
1316 buf->slots[length].change = 0;
1317 }
1318 return 0;
1319 }
1320
1321 length = sizeof(struct cdrom_mechstat_header) +
1322 cdi->capacity * sizeof(struct cdrom_slot);
1323
1324 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1325 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1326 cgc.cmd[8] = (length >> 8) & 0xff;
1327 cgc.cmd[9] = length & 0xff;
1328 return cdo->generic_packet(cdi, &cgc);
1329}
1330
1331static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1332{
1333 struct cdrom_changer_info *info;
1334 int ret;
1335
1336 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1337 if (cdi->sanyo_slot)
1338 return CDS_NO_INFO;
1339
1340 info = kmalloc(sizeof(*info), GFP_KERNEL);
1341 if (!info)
1342 return -ENOMEM;
1343
1344 if ((ret = cdrom_read_mech_status(cdi, info)))
1345 goto out_free;
1346
1347 if (info->slots[slot].disc_present)
1348 ret = CDS_DISC_OK;
1349 else
1350 ret = CDS_NO_DISC;
1351
1352out_free:
1353 kfree(info);
1354 return ret;
1355}
1356
1357/* Return the number of slots for an ATAPI/SCSI cdrom,
1358 * return 1 if not a changer.
1359 */
1360int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1361{
1362 int status;
1363 int nslots = 1;
1364 struct cdrom_changer_info *info;
1365
1366 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1367 /* cdrom_read_mech_status requires a valid value for capacity: */
1368 cdi->capacity = 0;
1369
1370 info = kmalloc(sizeof(*info), GFP_KERNEL);
1371 if (!info)
1372 return -ENOMEM;
1373
1374 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1375 nslots = info->hdr.nslots;
1376
1377 kfree(info);
1378 return nslots;
1379}
1380
1381
1382/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1383static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1384{
1385 struct packet_command cgc;
1386
1387 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1388 if (cdi->sanyo_slot && slot < 0)
1389 return 0;
1390
1391 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1392 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1393 cgc.cmd[4] = 2 + (slot >= 0);
1394 cgc.cmd[8] = slot;
1395 cgc.timeout = 60 * HZ;
1396
1397 /* The Sanyo 3 CD changer uses byte 7 of the
1398 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1399 using the GPCMD_LOAD_UNLOAD opcode. */
1400 if (cdi->sanyo_slot && -1 < slot) {
1401 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1402 cgc.cmd[7] = slot;
1403 cgc.cmd[4] = cgc.cmd[8] = 0;
1404 cdi->sanyo_slot = slot ? slot : 3;
1405 }
1406
1407 return cdi->ops->generic_packet(cdi, &cgc);
1408}
1409
1410static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1411{
1412 struct cdrom_changer_info *info;
1413 int curslot;
1414 int ret;
1415
1416 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1417 if (!CDROM_CAN(CDC_SELECT_DISC))
1418 return -EDRIVE_CANT_DO_THIS;
1419
1420 if (cdi->ops->check_events)
1421 cdi->ops->check_events(cdi, 0, slot);
1422
1423 if (slot == CDSL_NONE) {
1424 /* set media changed bits, on both queues */
1425 cdi->mc_flags = 0x3;
1426 return cdrom_load_unload(cdi, -1);
1427 }
1428
1429 info = kmalloc(sizeof(*info), GFP_KERNEL);
1430 if (!info)
1431 return -ENOMEM;
1432
1433 if ((ret = cdrom_read_mech_status(cdi, info))) {
1434 kfree(info);
1435 return ret;
1436 }
1437
1438 curslot = info->hdr.curslot;
1439 kfree(info);
1440
1441 if (cdi->use_count > 1 || cdi->keeplocked) {
1442 if (slot == CDSL_CURRENT) {
1443 return curslot;
1444 } else {
1445 return -EBUSY;
1446 }
1447 }
1448
1449 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1450 which is useful if it had been previously unloaded.
1451 Whether it can or not, it returns the current slot.
1452 Similarly, if slot happens to be the current one, we still
1453 try and load it. */
1454 if (slot == CDSL_CURRENT)
1455 slot = curslot;
1456
1457 /* set media changed bits on both queues */
1458 cdi->mc_flags = 0x3;
1459 if ((ret = cdrom_load_unload(cdi, slot)))
1460 return ret;
1461
1462 return slot;
1463}
1464
1465/*
1466 * As cdrom implements an extra ioctl consumer for media changed
1467 * event, it needs to buffer ->check_events() output, such that event
1468 * is not lost for both the usual VFS and ioctl paths.
1469 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1470 * path.
1471 *
1472 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1473 * called in parallel and buffering fields are accessed without any
1474 * exclusion. The original media_changed code had the same problem.
1475 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1476 * and remove this cruft altogether. It doesn't have much usefulness
1477 * at this point.
1478 */
1479static void cdrom_update_events(struct cdrom_device_info *cdi,
1480 unsigned int clearing)
1481{
1482 unsigned int events;
1483
1484 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1485 cdi->vfs_events |= events;
1486 cdi->ioctl_events |= events;
1487}
1488
1489unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1490 unsigned int clearing)
1491{
1492 unsigned int events;
1493
1494 cdrom_update_events(cdi, clearing);
1495 events = cdi->vfs_events;
1496 cdi->vfs_events = 0;
1497 return events;
1498}
1499EXPORT_SYMBOL(cdrom_check_events);
1500
1501/* We want to make media_changed accessible to the user through an
1502 * ioctl. The main problem now is that we must double-buffer the
1503 * low-level implementation, to assure that the VFS and the user both
1504 * see a medium change once.
1505 */
1506
1507static
1508int media_changed(struct cdrom_device_info *cdi, int queue)
1509{
1510 unsigned int mask = (1 << (queue & 1));
1511 int ret = !!(cdi->mc_flags & mask);
1512 bool changed;
1513
1514 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1515 return ret;
1516
1517 /* changed since last call? */
1518 BUG_ON(!queue); /* shouldn't be called from VFS path */
1519 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1520 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1521 cdi->ioctl_events = 0;
1522
1523 if (changed) {
1524 cdi->mc_flags = 0x3; /* set bit on both queues */
1525 ret |= 1;
1526 cdi->media_written = 0;
1527 }
1528
1529 cdi->mc_flags &= ~mask; /* clear bit */
1530 return ret;
1531}
1532
1533/* Requests to the low-level drivers will /always/ be done in the
1534 following format convention:
1535
1536 CDROM_LBA: all data-related requests.
1537 CDROM_MSF: all audio-related requests.
1538
1539 However, a low-level implementation is allowed to refuse this
1540 request, and return information in its own favorite format.
1541
1542 It doesn't make sense /at all/ to ask for a play_audio in LBA
1543 format, or ask for multi-session info in MSF format. However, for
1544 backward compatibility these format requests will be satisfied, but
1545 the requests to the low-level drivers will be sanitized in the more
1546 meaningful format indicated above.
1547 */
1548
1549static
1550void sanitize_format(union cdrom_addr *addr,
1551 u_char * curr, u_char requested)
1552{
1553 if (*curr == requested)
1554 return; /* nothing to be done! */
1555 if (requested == CDROM_LBA) {
1556 addr->lba = (int) addr->msf.frame +
1557 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1558 } else { /* CDROM_MSF */
1559 int lba = addr->lba;
1560 addr->msf.frame = lba % 75;
1561 lba /= 75;
1562 lba += 2;
1563 addr->msf.second = lba % 60;
1564 addr->msf.minute = lba / 60;
1565 }
1566 *curr = requested;
1567}
1568
1569void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1570 int type)
1571{
1572 memset(cgc, 0, sizeof(struct packet_command));
1573 if (buf)
1574 memset(buf, 0, len);
1575 cgc->buffer = (char *) buf;
1576 cgc->buflen = len;
1577 cgc->data_direction = type;
1578 cgc->timeout = CDROM_DEF_TIMEOUT;
1579}
1580
1581/* DVD handling */
1582
1583#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1584#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1585
1586static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1587{
1588 cgc->cmd[0] = GPCMD_REPORT_KEY;
1589 cgc->cmd[10] = type | (agid << 6);
1590 switch (type) {
1591 case 0: case 8: case 5: {
1592 cgc->buflen = 8;
1593 break;
1594 }
1595 case 1: {
1596 cgc->buflen = 16;
1597 break;
1598 }
1599 case 2: case 4: {
1600 cgc->buflen = 12;
1601 break;
1602 }
1603 }
1604 cgc->cmd[9] = cgc->buflen;
1605 cgc->data_direction = CGC_DATA_READ;
1606}
1607
1608static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1609{
1610 cgc->cmd[0] = GPCMD_SEND_KEY;
1611 cgc->cmd[10] = type | (agid << 6);
1612 switch (type) {
1613 case 1: {
1614 cgc->buflen = 16;
1615 break;
1616 }
1617 case 3: {
1618 cgc->buflen = 12;
1619 break;
1620 }
1621 case 6: {
1622 cgc->buflen = 8;
1623 break;
1624 }
1625 }
1626 cgc->cmd[9] = cgc->buflen;
1627 cgc->data_direction = CGC_DATA_WRITE;
1628}
1629
1630static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1631{
1632 int ret;
1633 u_char buf[20];
1634 struct packet_command cgc;
1635 const struct cdrom_device_ops *cdo = cdi->ops;
1636 rpc_state_t rpc_state;
1637
1638 memset(buf, 0, sizeof(buf));
1639 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1640
1641 switch (ai->type) {
1642 /* LU data send */
1643 case DVD_LU_SEND_AGID:
1644 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1645 cgc.quiet = 1;
1646 setup_report_key(&cgc, ai->lsa.agid, 0);
1647
1648 if ((ret = cdo->generic_packet(cdi, &cgc)))
1649 return ret;
1650
1651 ai->lsa.agid = buf[7] >> 6;
1652 /* Returning data, let host change state */
1653 break;
1654
1655 case DVD_LU_SEND_KEY1:
1656 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1657 setup_report_key(&cgc, ai->lsk.agid, 2);
1658
1659 if ((ret = cdo->generic_packet(cdi, &cgc)))
1660 return ret;
1661
1662 copy_key(ai->lsk.key, &buf[4]);
1663 /* Returning data, let host change state */
1664 break;
1665
1666 case DVD_LU_SEND_CHALLENGE:
1667 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1668 setup_report_key(&cgc, ai->lsc.agid, 1);
1669
1670 if ((ret = cdo->generic_packet(cdi, &cgc)))
1671 return ret;
1672
1673 copy_chal(ai->lsc.chal, &buf[4]);
1674 /* Returning data, let host change state */
1675 break;
1676
1677 /* Post-auth key */
1678 case DVD_LU_SEND_TITLE_KEY:
1679 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1680 cgc.quiet = 1;
1681 setup_report_key(&cgc, ai->lstk.agid, 4);
1682 cgc.cmd[5] = ai->lstk.lba;
1683 cgc.cmd[4] = ai->lstk.lba >> 8;
1684 cgc.cmd[3] = ai->lstk.lba >> 16;
1685 cgc.cmd[2] = ai->lstk.lba >> 24;
1686
1687 if ((ret = cdo->generic_packet(cdi, &cgc)))
1688 return ret;
1689
1690 ai->lstk.cpm = (buf[4] >> 7) & 1;
1691 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1692 ai->lstk.cgms = (buf[4] >> 4) & 3;
1693 copy_key(ai->lstk.title_key, &buf[5]);
1694 /* Returning data, let host change state */
1695 break;
1696
1697 case DVD_LU_SEND_ASF:
1698 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1699 setup_report_key(&cgc, ai->lsasf.agid, 5);
1700
1701 if ((ret = cdo->generic_packet(cdi, &cgc)))
1702 return ret;
1703
1704 ai->lsasf.asf = buf[7] & 1;
1705 break;
1706
1707 /* LU data receive (LU changes state) */
1708 case DVD_HOST_SEND_CHALLENGE:
1709 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1710 setup_send_key(&cgc, ai->hsc.agid, 1);
1711 buf[1] = 0xe;
1712 copy_chal(&buf[4], ai->hsc.chal);
1713
1714 if ((ret = cdo->generic_packet(cdi, &cgc)))
1715 return ret;
1716
1717 ai->type = DVD_LU_SEND_KEY1;
1718 break;
1719
1720 case DVD_HOST_SEND_KEY2:
1721 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1722 setup_send_key(&cgc, ai->hsk.agid, 3);
1723 buf[1] = 0xa;
1724 copy_key(&buf[4], ai->hsk.key);
1725
1726 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1727 ai->type = DVD_AUTH_FAILURE;
1728 return ret;
1729 }
1730 ai->type = DVD_AUTH_ESTABLISHED;
1731 break;
1732
1733 /* Misc */
1734 case DVD_INVALIDATE_AGID:
1735 cgc.quiet = 1;
1736 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1737 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1738 if ((ret = cdo->generic_packet(cdi, &cgc)))
1739 return ret;
1740 break;
1741
1742 /* Get region settings */
1743 case DVD_LU_SEND_RPC_STATE:
1744 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1745 setup_report_key(&cgc, 0, 8);
1746 memset(&rpc_state, 0, sizeof(rpc_state_t));
1747 cgc.buffer = (char *) &rpc_state;
1748
1749 if ((ret = cdo->generic_packet(cdi, &cgc)))
1750 return ret;
1751
1752 ai->lrpcs.type = rpc_state.type_code;
1753 ai->lrpcs.vra = rpc_state.vra;
1754 ai->lrpcs.ucca = rpc_state.ucca;
1755 ai->lrpcs.region_mask = rpc_state.region_mask;
1756 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1757 break;
1758
1759 /* Set region settings */
1760 case DVD_HOST_SEND_RPC_STATE:
1761 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1762 setup_send_key(&cgc, 0, 6);
1763 buf[1] = 6;
1764 buf[4] = ai->hrpcs.pdrc;
1765
1766 if ((ret = cdo->generic_packet(cdi, &cgc)))
1767 return ret;
1768 break;
1769
1770 default:
1771 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1772 return -ENOTTY;
1773 }
1774
1775 return 0;
1776}
1777
1778static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1779 struct packet_command *cgc)
1780{
1781 unsigned char buf[21], *base;
1782 struct dvd_layer *layer;
1783 const struct cdrom_device_ops *cdo = cdi->ops;
1784 int ret, layer_num = s->physical.layer_num;
1785
1786 if (layer_num >= DVD_LAYERS)
1787 return -EINVAL;
1788
1789 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1790 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1791 cgc->cmd[6] = layer_num;
1792 cgc->cmd[7] = s->type;
1793 cgc->cmd[9] = cgc->buflen & 0xff;
1794
1795 /*
1796 * refrain from reporting errors on non-existing layers (mainly)
1797 */
1798 cgc->quiet = 1;
1799
1800 ret = cdo->generic_packet(cdi, cgc);
1801 if (ret)
1802 return ret;
1803
1804 base = &buf[4];
1805 layer = &s->physical.layer[layer_num];
1806
1807 /*
1808 * place the data... really ugly, but at least we won't have to
1809 * worry about endianess in userspace.
1810 */
1811 memset(layer, 0, sizeof(*layer));
1812 layer->book_version = base[0] & 0xf;
1813 layer->book_type = base[0] >> 4;
1814 layer->min_rate = base[1] & 0xf;
1815 layer->disc_size = base[1] >> 4;
1816 layer->layer_type = base[2] & 0xf;
1817 layer->track_path = (base[2] >> 4) & 1;
1818 layer->nlayers = (base[2] >> 5) & 3;
1819 layer->track_density = base[3] & 0xf;
1820 layer->linear_density = base[3] >> 4;
1821 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1822 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1823 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1824 layer->bca = base[16] >> 7;
1825
1826 return 0;
1827}
1828
1829static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1830 struct packet_command *cgc)
1831{
1832 int ret;
1833 u_char buf[8];
1834 const struct cdrom_device_ops *cdo = cdi->ops;
1835
1836 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1837 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1838 cgc->cmd[6] = s->copyright.layer_num;
1839 cgc->cmd[7] = s->type;
1840 cgc->cmd[8] = cgc->buflen >> 8;
1841 cgc->cmd[9] = cgc->buflen & 0xff;
1842
1843 ret = cdo->generic_packet(cdi, cgc);
1844 if (ret)
1845 return ret;
1846
1847 s->copyright.cpst = buf[4];
1848 s->copyright.rmi = buf[5];
1849
1850 return 0;
1851}
1852
1853static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1854 struct packet_command *cgc)
1855{
1856 int ret, size;
1857 u_char *buf;
1858 const struct cdrom_device_ops *cdo = cdi->ops;
1859
1860 size = sizeof(s->disckey.value) + 4;
1861
1862 buf = kmalloc(size, GFP_KERNEL);
1863 if (!buf)
1864 return -ENOMEM;
1865
1866 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1867 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1868 cgc->cmd[7] = s->type;
1869 cgc->cmd[8] = size >> 8;
1870 cgc->cmd[9] = size & 0xff;
1871 cgc->cmd[10] = s->disckey.agid << 6;
1872
1873 ret = cdo->generic_packet(cdi, cgc);
1874 if (!ret)
1875 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1876
1877 kfree(buf);
1878 return ret;
1879}
1880
1881static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1882 struct packet_command *cgc)
1883{
1884 int ret, size = 4 + 188;
1885 u_char *buf;
1886 const struct cdrom_device_ops *cdo = cdi->ops;
1887
1888 buf = kmalloc(size, GFP_KERNEL);
1889 if (!buf)
1890 return -ENOMEM;
1891
1892 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1893 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1894 cgc->cmd[7] = s->type;
1895 cgc->cmd[9] = cgc->buflen & 0xff;
1896
1897 ret = cdo->generic_packet(cdi, cgc);
1898 if (ret)
1899 goto out;
1900
1901 s->bca.len = buf[0] << 8 | buf[1];
1902 if (s->bca.len < 12 || s->bca.len > 188) {
1903 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1904 s->bca.len);
1905 ret = -EIO;
1906 goto out;
1907 }
1908 memcpy(s->bca.value, &buf[4], s->bca.len);
1909 ret = 0;
1910out:
1911 kfree(buf);
1912 return ret;
1913}
1914
1915static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1916 struct packet_command *cgc)
1917{
1918 int ret = 0, size;
1919 u_char *buf;
1920 const struct cdrom_device_ops *cdo = cdi->ops;
1921
1922 size = sizeof(s->manufact.value) + 4;
1923
1924 buf = kmalloc(size, GFP_KERNEL);
1925 if (!buf)
1926 return -ENOMEM;
1927
1928 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1929 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1930 cgc->cmd[7] = s->type;
1931 cgc->cmd[8] = size >> 8;
1932 cgc->cmd[9] = size & 0xff;
1933
1934 ret = cdo->generic_packet(cdi, cgc);
1935 if (ret)
1936 goto out;
1937
1938 s->manufact.len = buf[0] << 8 | buf[1];
1939 if (s->manufact.len < 0) {
1940 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1941 s->manufact.len);
1942 ret = -EIO;
1943 } else {
1944 if (s->manufact.len > 2048) {
1945 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1946 s->manufact.len);
1947 s->manufact.len = 2048;
1948 }
1949 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1950 }
1951
1952out:
1953 kfree(buf);
1954 return ret;
1955}
1956
1957static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1958 struct packet_command *cgc)
1959{
1960 switch (s->type) {
1961 case DVD_STRUCT_PHYSICAL:
1962 return dvd_read_physical(cdi, s, cgc);
1963
1964 case DVD_STRUCT_COPYRIGHT:
1965 return dvd_read_copyright(cdi, s, cgc);
1966
1967 case DVD_STRUCT_DISCKEY:
1968 return dvd_read_disckey(cdi, s, cgc);
1969
1970 case DVD_STRUCT_BCA:
1971 return dvd_read_bca(cdi, s, cgc);
1972
1973 case DVD_STRUCT_MANUFACT:
1974 return dvd_read_manufact(cdi, s, cgc);
1975
1976 default:
1977 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1978 s->type);
1979 return -EINVAL;
1980 }
1981}
1982
1983int cdrom_mode_sense(struct cdrom_device_info *cdi,
1984 struct packet_command *cgc,
1985 int page_code, int page_control)
1986{
1987 const struct cdrom_device_ops *cdo = cdi->ops;
1988
1989 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1990
1991 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1992 cgc->cmd[2] = page_code | (page_control << 6);
1993 cgc->cmd[7] = cgc->buflen >> 8;
1994 cgc->cmd[8] = cgc->buflen & 0xff;
1995 cgc->data_direction = CGC_DATA_READ;
1996 return cdo->generic_packet(cdi, cgc);
1997}
1998
1999int cdrom_mode_select(struct cdrom_device_info *cdi,
2000 struct packet_command *cgc)
2001{
2002 const struct cdrom_device_ops *cdo = cdi->ops;
2003
2004 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2005 memset(cgc->buffer, 0, 2);
2006 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2007 cgc->cmd[1] = 0x10; /* PF */
2008 cgc->cmd[7] = cgc->buflen >> 8;
2009 cgc->cmd[8] = cgc->buflen & 0xff;
2010 cgc->data_direction = CGC_DATA_WRITE;
2011 return cdo->generic_packet(cdi, cgc);
2012}
2013
2014static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2015 struct cdrom_subchnl *subchnl, int mcn)
2016{
2017 const struct cdrom_device_ops *cdo = cdi->ops;
2018 struct packet_command cgc;
2019 char buffer[32];
2020 int ret;
2021
2022 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2023 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2024 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2025 cgc.cmd[2] = 0x40; /* request subQ data */
2026 cgc.cmd[3] = mcn ? 2 : 1;
2027 cgc.cmd[8] = 16;
2028
2029 if ((ret = cdo->generic_packet(cdi, &cgc)))
2030 return ret;
2031
2032 subchnl->cdsc_audiostatus = cgc.buffer[1];
2033 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2034 subchnl->cdsc_trk = cgc.buffer[6];
2035 subchnl->cdsc_ind = cgc.buffer[7];
2036
2037 if (subchnl->cdsc_format == CDROM_LBA) {
2038 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2039 (cgc.buffer[9] << 16) |
2040 (cgc.buffer[10] << 8) |
2041 (cgc.buffer[11]));
2042 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2043 (cgc.buffer[13] << 16) |
2044 (cgc.buffer[14] << 8) |
2045 (cgc.buffer[15]));
2046 } else {
2047 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2048 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2049 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2050 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2051 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2052 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2053 }
2054
2055 return 0;
2056}
2057
2058/*
2059 * Specific READ_10 interface
2060 */
2061static int cdrom_read_cd(struct cdrom_device_info *cdi,
2062 struct packet_command *cgc, int lba,
2063 int blocksize, int nblocks)
2064{
2065 const struct cdrom_device_ops *cdo = cdi->ops;
2066
2067 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2068 cgc->cmd[0] = GPCMD_READ_10;
2069 cgc->cmd[2] = (lba >> 24) & 0xff;
2070 cgc->cmd[3] = (lba >> 16) & 0xff;
2071 cgc->cmd[4] = (lba >> 8) & 0xff;
2072 cgc->cmd[5] = lba & 0xff;
2073 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2074 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2075 cgc->cmd[8] = nblocks & 0xff;
2076 cgc->buflen = blocksize * nblocks;
2077 return cdo->generic_packet(cdi, cgc);
2078}
2079
2080/* very generic interface for reading the various types of blocks */
2081static int cdrom_read_block(struct cdrom_device_info *cdi,
2082 struct packet_command *cgc,
2083 int lba, int nblocks, int format, int blksize)
2084{
2085 const struct cdrom_device_ops *cdo = cdi->ops;
2086
2087 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2088 cgc->cmd[0] = GPCMD_READ_CD;
2089 /* expected sector size - cdda,mode1,etc. */
2090 cgc->cmd[1] = format << 2;
2091 /* starting address */
2092 cgc->cmd[2] = (lba >> 24) & 0xff;
2093 cgc->cmd[3] = (lba >> 16) & 0xff;
2094 cgc->cmd[4] = (lba >> 8) & 0xff;
2095 cgc->cmd[5] = lba & 0xff;
2096 /* number of blocks */
2097 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2098 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2099 cgc->cmd[8] = nblocks & 0xff;
2100 cgc->buflen = blksize * nblocks;
2101
2102 /* set the header info returned */
2103 switch (blksize) {
2104 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2105 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2106 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2107 default : cgc->cmd[9] = 0x10;
2108 }
2109
2110 return cdo->generic_packet(cdi, cgc);
2111}
2112
2113static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2114 int lba, int nframes)
2115{
2116 struct packet_command cgc;
2117 int ret = 0;
2118 int nr;
2119
2120 cdi->last_sense = 0;
2121
2122 memset(&cgc, 0, sizeof(cgc));
2123
2124 /*
2125 * start with will ra.nframes size, back down if alloc fails
2126 */
2127 nr = nframes;
2128 do {
2129 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL);
2130 if (cgc.buffer)
2131 break;
2132
2133 nr >>= 1;
2134 } while (nr);
2135
2136 if (!nr)
2137 return -ENOMEM;
2138
2139 cgc.data_direction = CGC_DATA_READ;
2140 while (nframes > 0) {
2141 if (nr > nframes)
2142 nr = nframes;
2143
2144 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2145 if (ret)
2146 break;
2147 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2148 ret = -EFAULT;
2149 break;
2150 }
2151 ubuf += CD_FRAMESIZE_RAW * nr;
2152 nframes -= nr;
2153 lba += nr;
2154 }
2155 kfree(cgc.buffer);
2156 return ret;
2157}
2158
2159static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2160 int lba, int nframes)
2161{
2162 struct request_queue *q = cdi->disk->queue;
2163 struct request *rq;
2164 struct scsi_request *req;
2165 struct bio *bio;
2166 unsigned int len;
2167 int nr, ret = 0;
2168
2169 if (!q)
2170 return -ENXIO;
2171
2172 if (!blk_queue_scsi_passthrough(q)) {
2173 WARN_ONCE(true,
2174 "Attempt read CDDA info through a non-SCSI queue\n");
2175 return -EINVAL;
2176 }
2177
2178 cdi->last_sense = 0;
2179
2180 while (nframes) {
2181 nr = nframes;
2182 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2183 nr = 1;
2184 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2185 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2186
2187 len = nr * CD_FRAMESIZE_RAW;
2188
2189 rq = blk_get_request(q, REQ_OP_SCSI_IN, 0);
2190 if (IS_ERR(rq)) {
2191 ret = PTR_ERR(rq);
2192 break;
2193 }
2194 req = scsi_req(rq);
2195
2196 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2197 if (ret) {
2198 blk_put_request(rq);
2199 break;
2200 }
2201
2202 req->cmd[0] = GPCMD_READ_CD;
2203 req->cmd[1] = 1 << 2;
2204 req->cmd[2] = (lba >> 24) & 0xff;
2205 req->cmd[3] = (lba >> 16) & 0xff;
2206 req->cmd[4] = (lba >> 8) & 0xff;
2207 req->cmd[5] = lba & 0xff;
2208 req->cmd[6] = (nr >> 16) & 0xff;
2209 req->cmd[7] = (nr >> 8) & 0xff;
2210 req->cmd[8] = nr & 0xff;
2211 req->cmd[9] = 0xf8;
2212
2213 req->cmd_len = 12;
2214 rq->timeout = 60 * HZ;
2215 bio = rq->bio;
2216
2217 blk_execute_rq(q, cdi->disk, rq, 0);
2218 if (scsi_req(rq)->result) {
2219 struct scsi_sense_hdr sshdr;
2220
2221 ret = -EIO;
2222 scsi_normalize_sense(req->sense, req->sense_len,
2223 &sshdr);
2224 cdi->last_sense = sshdr.sense_key;
2225 }
2226
2227 if (blk_rq_unmap_user(bio))
2228 ret = -EFAULT;
2229 blk_put_request(rq);
2230
2231 if (ret)
2232 break;
2233
2234 nframes -= nr;
2235 lba += nr;
2236 ubuf += len;
2237 }
2238
2239 return ret;
2240}
2241
2242static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2243 int lba, int nframes)
2244{
2245 int ret;
2246
2247 if (cdi->cdda_method == CDDA_OLD)
2248 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2249
2250retry:
2251 /*
2252 * for anything else than success and io error, we need to retry
2253 */
2254 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2255 if (!ret || ret != -EIO)
2256 return ret;
2257
2258 /*
2259 * I've seen drives get sense 4/8/3 udma crc errors on multi
2260 * frame dma, so drop to single frame dma if we need to
2261 */
2262 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2263 pr_info("dropping to single frame dma\n");
2264 cdi->cdda_method = CDDA_BPC_SINGLE;
2265 goto retry;
2266 }
2267
2268 /*
2269 * so we have an io error of some sort with multi frame dma. if the
2270 * condition wasn't a hardware error
2271 * problems, not for any error
2272 */
2273 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2274 return ret;
2275
2276 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2277 cdi->cdda_method = CDDA_OLD;
2278 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2279}
2280
2281int cdrom_multisession(struct cdrom_device_info *cdi,
2282 struct cdrom_multisession *info)
2283{
2284 u8 requested_format;
2285 int ret;
2286
2287 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2288 return -ENOSYS;
2289
2290 requested_format = info->addr_format;
2291 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2292 return -EINVAL;
2293 info->addr_format = CDROM_LBA;
2294
2295 ret = cdi->ops->get_last_session(cdi, info);
2296 if (!ret)
2297 sanitize_format(&info->addr, &info->addr_format,
2298 requested_format);
2299 return ret;
2300}
2301EXPORT_SYMBOL_GPL(cdrom_multisession);
2302
2303static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2304 void __user *argp)
2305{
2306 struct cdrom_multisession info;
2307 int ret;
2308
2309 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2310
2311 if (copy_from_user(&info, argp, sizeof(info)))
2312 return -EFAULT;
2313 ret = cdrom_multisession(cdi, &info);
2314 if (ret)
2315 return ret;
2316 if (copy_to_user(argp, &info, sizeof(info)))
2317 return -EFAULT;
2318
2319 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2320 return ret;
2321}
2322
2323static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2324{
2325 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2326
2327 if (!CDROM_CAN(CDC_OPEN_TRAY))
2328 return -ENOSYS;
2329 if (cdi->use_count != 1 || cdi->keeplocked)
2330 return -EBUSY;
2331 if (CDROM_CAN(CDC_LOCK)) {
2332 int ret = cdi->ops->lock_door(cdi, 0);
2333 if (ret)
2334 return ret;
2335 }
2336
2337 return cdi->ops->tray_move(cdi, 1);
2338}
2339
2340static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2341{
2342 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2343
2344 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2345 return -ENOSYS;
2346 return cdi->ops->tray_move(cdi, 0);
2347}
2348
2349static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2350 unsigned long arg)
2351{
2352 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2353
2354 if (!CDROM_CAN(CDC_OPEN_TRAY))
2355 return -ENOSYS;
2356 if (cdi->keeplocked)
2357 return -EBUSY;
2358
2359 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2360 if (arg)
2361 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2362 return 0;
2363}
2364
2365static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2366 unsigned long arg)
2367{
2368 struct cdrom_changer_info *info;
2369 int ret;
2370
2371 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2372
2373 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2374 return -ENOSYS;
2375
2376 /* cannot select disc or select current disc */
2377 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2378 return media_changed(cdi, 1);
2379
2380 if (arg >= cdi->capacity)
2381 return -EINVAL;
2382
2383 info = kmalloc(sizeof(*info), GFP_KERNEL);
2384 if (!info)
2385 return -ENOMEM;
2386
2387 ret = cdrom_read_mech_status(cdi, info);
2388 if (!ret)
2389 ret = info->slots[arg].change;
2390 kfree(info);
2391 return ret;
2392}
2393
2394static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2395 unsigned long arg)
2396{
2397 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2398
2399 /*
2400 * Options need to be in sync with capability.
2401 * Too late for that, so we have to check each one separately.
2402 */
2403 switch (arg) {
2404 case CDO_USE_FFLAGS:
2405 case CDO_CHECK_TYPE:
2406 break;
2407 case CDO_LOCK:
2408 if (!CDROM_CAN(CDC_LOCK))
2409 return -ENOSYS;
2410 break;
2411 case 0:
2412 return cdi->options;
2413 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2414 default:
2415 if (!CDROM_CAN(arg))
2416 return -ENOSYS;
2417 }
2418 cdi->options |= (int) arg;
2419 return cdi->options;
2420}
2421
2422static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2423 unsigned long arg)
2424{
2425 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2426
2427 cdi->options &= ~(int) arg;
2428 return cdi->options;
2429}
2430
2431static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2432 unsigned long arg)
2433{
2434 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2435
2436 if (!CDROM_CAN(CDC_SELECT_SPEED))
2437 return -ENOSYS;
2438 return cdi->ops->select_speed(cdi, arg);
2439}
2440
2441static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2442 unsigned long arg)
2443{
2444 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2445
2446 if (!CDROM_CAN(CDC_SELECT_DISC))
2447 return -ENOSYS;
2448
2449 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2450 if (arg >= cdi->capacity)
2451 return -EINVAL;
2452 }
2453
2454 /*
2455 * ->select_disc is a hook to allow a driver-specific way of
2456 * seleting disc. However, since there is no equivalent hook for
2457 * cdrom_slot_status this may not actually be useful...
2458 */
2459 if (cdi->ops->select_disc)
2460 return cdi->ops->select_disc(cdi, arg);
2461
2462 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2463 return cdrom_select_disc(cdi, arg);
2464}
2465
2466static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2467 struct block_device *bdev)
2468{
2469 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2470
2471 if (!capable(CAP_SYS_ADMIN))
2472 return -EACCES;
2473 if (!CDROM_CAN(CDC_RESET))
2474 return -ENOSYS;
2475 invalidate_bdev(bdev);
2476 return cdi->ops->reset(cdi);
2477}
2478
2479static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2480 unsigned long arg)
2481{
2482 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2483
2484 if (!CDROM_CAN(CDC_LOCK))
2485 return -EDRIVE_CANT_DO_THIS;
2486
2487 cdi->keeplocked = arg ? 1 : 0;
2488
2489 /*
2490 * Don't unlock the door on multiple opens by default, but allow
2491 * root to do so.
2492 */
2493 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2494 return -EBUSY;
2495 return cdi->ops->lock_door(cdi, arg);
2496}
2497
2498static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2499 unsigned long arg)
2500{
2501 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2502
2503 if (!capable(CAP_SYS_ADMIN))
2504 return -EACCES;
2505 debug = arg ? 1 : 0;
2506 return debug;
2507}
2508
2509static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2510{
2511 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2512 return (cdi->ops->capability & ~cdi->mask);
2513}
2514
2515/*
2516 * The following function is implemented, although very few audio
2517 * discs give Universal Product Code information, which should just be
2518 * the Medium Catalog Number on the box. Note, that the way the code
2519 * is written on the CD is /not/ uniform across all discs!
2520 */
2521static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2522 void __user *argp)
2523{
2524 struct cdrom_mcn mcn;
2525 int ret;
2526
2527 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2528
2529 if (!(cdi->ops->capability & CDC_MCN))
2530 return -ENOSYS;
2531 ret = cdi->ops->get_mcn(cdi, &mcn);
2532 if (ret)
2533 return ret;
2534
2535 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2536 return -EFAULT;
2537 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2538 return 0;
2539}
2540
2541static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2542 unsigned long arg)
2543{
2544 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2545
2546 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2547 return -ENOSYS;
2548 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2549 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2550 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2551 if (arg >= cdi->capacity)
2552 return -EINVAL;
2553 return cdrom_slot_status(cdi, arg);
2554}
2555
2556/*
2557 * Ok, this is where problems start. The current interface for the
2558 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2559 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2560 * is often the case, it is also very common for CDs to have some tracks
2561 * with data, and some tracks with audio. Just because I feel like it,
2562 * I declare the following to be the best way to cope. If the CD has ANY
2563 * data tracks on it, it will be returned as a data CD. If it has any XA
2564 * tracks, I will return it as that. Now I could simplify this interface
2565 * by combining these returns with the above, but this more clearly
2566 * demonstrates the problem with the current interface. Too bad this
2567 * wasn't designed to use bitmasks... -Erik
2568 *
2569 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2570 * User level programmers might feel the ioctl is not very useful.
2571 * ---david
2572 */
2573static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2574{
2575 tracktype tracks;
2576
2577 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2578
2579 cdrom_count_tracks(cdi, &tracks);
2580 if (tracks.error)
2581 return tracks.error;
2582
2583 /* Policy mode on */
2584 if (tracks.audio > 0) {
2585 if (!tracks.data && !tracks.cdi && !tracks.xa)
2586 return CDS_AUDIO;
2587 else
2588 return CDS_MIXED;
2589 }
2590
2591 if (tracks.cdi > 0)
2592 return CDS_XA_2_2;
2593 if (tracks.xa > 0)
2594 return CDS_XA_2_1;
2595 if (tracks.data > 0)
2596 return CDS_DATA_1;
2597 /* Policy mode off */
2598
2599 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2600 return CDS_NO_INFO;
2601}
2602
2603static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2604{
2605 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2606 return cdi->capacity;
2607}
2608
2609static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2610 void __user *argp)
2611{
2612 struct cdrom_subchnl q;
2613 u8 requested, back;
2614 int ret;
2615
2616 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2617
2618 if (copy_from_user(&q, argp, sizeof(q)))
2619 return -EFAULT;
2620
2621 requested = q.cdsc_format;
2622 if (requested != CDROM_MSF && requested != CDROM_LBA)
2623 return -EINVAL;
2624 q.cdsc_format = CDROM_MSF;
2625
2626 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2627 if (ret)
2628 return ret;
2629
2630 back = q.cdsc_format; /* local copy */
2631 sanitize_format(&q.cdsc_absaddr, &back, requested);
2632 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2633
2634 if (copy_to_user(argp, &q, sizeof(q)))
2635 return -EFAULT;
2636 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2637 return 0;
2638}
2639
2640static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2641 void __user *argp)
2642{
2643 struct cdrom_tochdr header;
2644 int ret;
2645
2646 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2647
2648 if (copy_from_user(&header, argp, sizeof(header)))
2649 return -EFAULT;
2650
2651 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2652 if (ret)
2653 return ret;
2654
2655 if (copy_to_user(argp, &header, sizeof(header)))
2656 return -EFAULT;
2657 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2658 return 0;
2659}
2660
2661int cdrom_read_tocentry(struct cdrom_device_info *cdi,
2662 struct cdrom_tocentry *entry)
2663{
2664 u8 requested_format = entry->cdte_format;
2665 int ret;
2666
2667 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2668 return -EINVAL;
2669
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 sanitize_format(&entry->cdte_addr, &entry->cdte_format,
2675 requested_format);
2676 return ret;
2677}
2678EXPORT_SYMBOL_GPL(cdrom_read_tocentry);
2679
2680static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2681 void __user *argp)
2682{
2683 struct cdrom_tocentry entry;
2684 int ret;
2685
2686 if (copy_from_user(&entry, argp, sizeof(entry)))
2687 return -EFAULT;
2688 ret = cdrom_read_tocentry(cdi, &entry);
2689 if (!ret && copy_to_user(argp, &entry, sizeof(entry)))
2690 return -EFAULT;
2691 return ret;
2692}
2693
2694static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2695 void __user *argp)
2696{
2697 struct cdrom_msf msf;
2698
2699 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2700
2701 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2702 return -ENOSYS;
2703 if (copy_from_user(&msf, argp, sizeof(msf)))
2704 return -EFAULT;
2705 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2706}
2707
2708static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2709 void __user *argp)
2710{
2711 struct cdrom_ti ti;
2712 int ret;
2713
2714 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2715
2716 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2717 return -ENOSYS;
2718 if (copy_from_user(&ti, argp, sizeof(ti)))
2719 return -EFAULT;
2720
2721 ret = check_for_audio_disc(cdi, cdi->ops);
2722 if (ret)
2723 return ret;
2724 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2725}
2726static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2727 void __user *argp)
2728{
2729 struct cdrom_volctrl volume;
2730
2731 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2732
2733 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2734 return -ENOSYS;
2735 if (copy_from_user(&volume, argp, sizeof(volume)))
2736 return -EFAULT;
2737 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2738}
2739
2740static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2741 void __user *argp)
2742{
2743 struct cdrom_volctrl volume;
2744 int ret;
2745
2746 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2747
2748 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2749 return -ENOSYS;
2750
2751 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2752 if (ret)
2753 return ret;
2754
2755 if (copy_to_user(argp, &volume, sizeof(volume)))
2756 return -EFAULT;
2757 return 0;
2758}
2759
2760static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2761 unsigned int cmd)
2762{
2763 int ret;
2764
2765 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2766
2767 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2768 return -ENOSYS;
2769 ret = check_for_audio_disc(cdi, cdi->ops);
2770 if (ret)
2771 return ret;
2772 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2773}
2774
2775/*
2776 * Required when we need to use READ_10 to issue other than 2048 block
2777 * reads
2778 */
2779static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2780{
2781 const struct cdrom_device_ops *cdo = cdi->ops;
2782 struct packet_command cgc;
2783 struct modesel_head mh;
2784
2785 memset(&mh, 0, sizeof(mh));
2786 mh.block_desc_length = 0x08;
2787 mh.block_length_med = (size >> 8) & 0xff;
2788 mh.block_length_lo = size & 0xff;
2789
2790 memset(&cgc, 0, sizeof(cgc));
2791 cgc.cmd[0] = 0x15;
2792 cgc.cmd[1] = 1 << 4;
2793 cgc.cmd[4] = 12;
2794 cgc.buflen = sizeof(mh);
2795 cgc.buffer = (char *) &mh;
2796 cgc.data_direction = CGC_DATA_WRITE;
2797 mh.block_desc_length = 0x08;
2798 mh.block_length_med = (size >> 8) & 0xff;
2799 mh.block_length_lo = size & 0xff;
2800
2801 return cdo->generic_packet(cdi, &cgc);
2802}
2803
2804static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2805 __u16 track, __u8 type, track_information *ti)
2806{
2807 const struct cdrom_device_ops *cdo = cdi->ops;
2808 struct packet_command cgc;
2809 int ret, buflen;
2810
2811 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2812 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2813 cgc.cmd[1] = type & 3;
2814 cgc.cmd[4] = (track & 0xff00) >> 8;
2815 cgc.cmd[5] = track & 0xff;
2816 cgc.cmd[8] = 8;
2817 cgc.quiet = 1;
2818
2819 ret = cdo->generic_packet(cdi, &cgc);
2820 if (ret)
2821 return ret;
2822
2823 buflen = be16_to_cpu(ti->track_information_length) +
2824 sizeof(ti->track_information_length);
2825
2826 if (buflen > sizeof(track_information))
2827 buflen = sizeof(track_information);
2828
2829 cgc.cmd[8] = cgc.buflen = buflen;
2830 ret = cdo->generic_packet(cdi, &cgc);
2831 if (ret)
2832 return ret;
2833
2834 /* return actual fill size */
2835 return buflen;
2836}
2837
2838/* return the last written block on the CD-R media. this is for the udf
2839 file system. */
2840int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2841{
2842 struct cdrom_tocentry toc;
2843 disc_information di;
2844 track_information ti;
2845 __u32 last_track;
2846 int ret = -1, ti_size;
2847
2848 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2849 goto use_toc;
2850
2851 ret = cdrom_get_disc_info(cdi, &di);
2852 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2853 + sizeof(di.last_track_lsb)))
2854 goto use_toc;
2855
2856 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2857 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2858 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2859 if (ti_size < (int)offsetof(typeof(ti), track_start))
2860 goto use_toc;
2861
2862 /* if this track is blank, try the previous. */
2863 if (ti.blank) {
2864 if (last_track == 1)
2865 goto use_toc;
2866 last_track--;
2867 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2868 }
2869
2870 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2871 + sizeof(ti.track_size)))
2872 goto use_toc;
2873
2874 /* if last recorded field is valid, return it. */
2875 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2876 + sizeof(ti.last_rec_address))) {
2877 *last_written = be32_to_cpu(ti.last_rec_address);
2878 } else {
2879 /* make it up instead */
2880 *last_written = be32_to_cpu(ti.track_start) +
2881 be32_to_cpu(ti.track_size);
2882 if (ti.free_blocks)
2883 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2884 }
2885 return 0;
2886
2887 /* this is where we end up if the drive either can't do a
2888 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2889 it doesn't give enough information or fails. then we return
2890 the toc contents. */
2891use_toc:
2892 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2893 return -ENOSYS;
2894
2895 toc.cdte_format = CDROM_MSF;
2896 toc.cdte_track = CDROM_LEADOUT;
2897 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2898 return ret;
2899 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2900 *last_written = toc.cdte_addr.lba;
2901 return 0;
2902}
2903
2904/* return the next writable block. also for udf file system. */
2905static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2906 long *next_writable)
2907{
2908 disc_information di;
2909 track_information ti;
2910 __u16 last_track;
2911 int ret, ti_size;
2912
2913 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2914 goto use_last_written;
2915
2916 ret = cdrom_get_disc_info(cdi, &di);
2917 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2918 + sizeof(di.last_track_lsb))
2919 goto use_last_written;
2920
2921 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2922 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2923 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2924 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2925 goto use_last_written;
2926
2927 /* if this track is blank, try the previous. */
2928 if (ti.blank) {
2929 if (last_track == 1)
2930 goto use_last_written;
2931 last_track--;
2932 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2933 if (ti_size < 0)
2934 goto use_last_written;
2935 }
2936
2937 /* if next recordable address field is valid, use it. */
2938 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2939 + sizeof(ti.next_writable)) {
2940 *next_writable = be32_to_cpu(ti.next_writable);
2941 return 0;
2942 }
2943
2944use_last_written:
2945 ret = cdrom_get_last_written(cdi, next_writable);
2946 if (ret) {
2947 *next_writable = 0;
2948 return ret;
2949 } else {
2950 *next_writable += 7;
2951 return 0;
2952 }
2953}
2954
2955static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2956 void __user *arg,
2957 struct packet_command *cgc,
2958 int cmd)
2959{
2960 struct scsi_sense_hdr sshdr;
2961 struct cdrom_msf msf;
2962 int blocksize = 0, format = 0, lba;
2963 int ret;
2964
2965 switch (cmd) {
2966 case CDROMREADRAW:
2967 blocksize = CD_FRAMESIZE_RAW;
2968 break;
2969 case CDROMREADMODE1:
2970 blocksize = CD_FRAMESIZE;
2971 format = 2;
2972 break;
2973 case CDROMREADMODE2:
2974 blocksize = CD_FRAMESIZE_RAW0;
2975 break;
2976 }
2977 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2978 return -EFAULT;
2979 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2980 /* FIXME: we need upper bound checking, too!! */
2981 if (lba < 0)
2982 return -EINVAL;
2983
2984 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2985 if (cgc->buffer == NULL)
2986 return -ENOMEM;
2987
2988 memset(&sshdr, 0, sizeof(sshdr));
2989 cgc->sshdr = &sshdr;
2990 cgc->data_direction = CGC_DATA_READ;
2991 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2992 if (ret && sshdr.sense_key == 0x05 &&
2993 sshdr.asc == 0x20 &&
2994 sshdr.ascq == 0x00) {
2995 /*
2996 * SCSI-II devices are not required to support
2997 * READ_CD, so let's try switching block size
2998 */
2999 /* FIXME: switch back again... */
3000 ret = cdrom_switch_blocksize(cdi, blocksize);
3001 if (ret)
3002 goto out;
3003 cgc->sshdr = NULL;
3004 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
3005 ret |= cdrom_switch_blocksize(cdi, blocksize);
3006 }
3007 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
3008 ret = -EFAULT;
3009out:
3010 kfree(cgc->buffer);
3011 return ret;
3012}
3013
3014static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3015 void __user *arg)
3016{
3017 struct cdrom_read_audio ra;
3018 int lba;
3019
3020#ifdef CONFIG_COMPAT
3021 if (in_compat_syscall()) {
3022 struct compat_cdrom_read_audio {
3023 union cdrom_addr addr;
3024 u8 addr_format;
3025 compat_int_t nframes;
3026 compat_caddr_t buf;
3027 } ra32;
3028
3029 if (copy_from_user(&ra32, arg, sizeof(ra32)))
3030 return -EFAULT;
3031
3032 ra = (struct cdrom_read_audio) {
3033 .addr = ra32.addr,
3034 .addr_format = ra32.addr_format,
3035 .nframes = ra32.nframes,
3036 .buf = compat_ptr(ra32.buf),
3037 };
3038 } else
3039#endif
3040 {
3041 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3042 sizeof(ra)))
3043 return -EFAULT;
3044 }
3045
3046 if (ra.addr_format == CDROM_MSF)
3047 lba = msf_to_lba(ra.addr.msf.minute,
3048 ra.addr.msf.second,
3049 ra.addr.msf.frame);
3050 else if (ra.addr_format == CDROM_LBA)
3051 lba = ra.addr.lba;
3052 else
3053 return -EINVAL;
3054
3055 /* FIXME: we need upper bound checking, too!! */
3056 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3057 return -EINVAL;
3058
3059 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3060}
3061
3062static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3063 void __user *arg)
3064{
3065 int ret;
3066 struct cdrom_subchnl q;
3067 u_char requested, back;
3068 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3069 return -EFAULT;
3070 requested = q.cdsc_format;
3071 if (!((requested == CDROM_MSF) ||
3072 (requested == CDROM_LBA)))
3073 return -EINVAL;
3074
3075 ret = cdrom_read_subchannel(cdi, &q, 0);
3076 if (ret)
3077 return ret;
3078 back = q.cdsc_format; /* local copy */
3079 sanitize_format(&q.cdsc_absaddr, &back, requested);
3080 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3081 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3082 return -EFAULT;
3083 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3084 return 0;
3085}
3086
3087static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3088 void __user *arg,
3089 struct packet_command *cgc)
3090{
3091 const struct cdrom_device_ops *cdo = cdi->ops;
3092 struct cdrom_msf msf;
3093 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3094 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3095 return -EFAULT;
3096 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3097 cgc->cmd[3] = msf.cdmsf_min0;
3098 cgc->cmd[4] = msf.cdmsf_sec0;
3099 cgc->cmd[5] = msf.cdmsf_frame0;
3100 cgc->cmd[6] = msf.cdmsf_min1;
3101 cgc->cmd[7] = msf.cdmsf_sec1;
3102 cgc->cmd[8] = msf.cdmsf_frame1;
3103 cgc->data_direction = CGC_DATA_NONE;
3104 return cdo->generic_packet(cdi, cgc);
3105}
3106
3107static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3108 void __user *arg,
3109 struct packet_command *cgc)
3110{
3111 const struct cdrom_device_ops *cdo = cdi->ops;
3112 struct cdrom_blk blk;
3113 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3114 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3115 return -EFAULT;
3116 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3117 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3118 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3119 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3120 cgc->cmd[5] = blk.from & 0xff;
3121 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3122 cgc->cmd[8] = blk.len & 0xff;
3123 cgc->data_direction = CGC_DATA_NONE;
3124 return cdo->generic_packet(cdi, cgc);
3125}
3126
3127static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3128 void __user *arg,
3129 struct packet_command *cgc,
3130 unsigned int cmd)
3131{
3132 struct cdrom_volctrl volctrl;
3133 unsigned char buffer[32];
3134 char mask[sizeof(buffer)];
3135 unsigned short offset;
3136 int ret;
3137
3138 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3139
3140 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3141 sizeof(volctrl)))
3142 return -EFAULT;
3143
3144 cgc->buffer = buffer;
3145 cgc->buflen = 24;
3146 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3147 if (ret)
3148 return ret;
3149
3150 /* originally the code depended on buffer[1] to determine
3151 how much data is available for transfer. buffer[1] is
3152 unfortunately ambigious and the only reliable way seem
3153 to be to simply skip over the block descriptor... */
3154 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3155
3156 if (offset + 16 > sizeof(buffer))
3157 return -E2BIG;
3158
3159 if (offset + 16 > cgc->buflen) {
3160 cgc->buflen = offset + 16;
3161 ret = cdrom_mode_sense(cdi, cgc,
3162 GPMODE_AUDIO_CTL_PAGE, 0);
3163 if (ret)
3164 return ret;
3165 }
3166
3167 /* sanity check */
3168 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3169 buffer[offset + 1] < 14)
3170 return -EINVAL;
3171
3172 /* now we have the current volume settings. if it was only
3173 a CDROMVOLREAD, return these values */
3174 if (cmd == CDROMVOLREAD) {
3175 volctrl.channel0 = buffer[offset+9];
3176 volctrl.channel1 = buffer[offset+11];
3177 volctrl.channel2 = buffer[offset+13];
3178 volctrl.channel3 = buffer[offset+15];
3179 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3180 sizeof(volctrl)))
3181 return -EFAULT;
3182 return 0;
3183 }
3184
3185 /* get the volume mask */
3186 cgc->buffer = mask;
3187 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3188 if (ret)
3189 return ret;
3190
3191 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3192 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3193 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3194 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3195
3196 /* set volume */
3197 cgc->buffer = buffer + offset - 8;
3198 memset(cgc->buffer, 0, 8);
3199 return cdrom_mode_select(cdi, cgc);
3200}
3201
3202static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3203 struct packet_command *cgc,
3204 int cmd)
3205{
3206 const struct cdrom_device_ops *cdo = cdi->ops;
3207 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3208 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3209 cgc->cmd[1] = 1;
3210 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3211 cgc->data_direction = CGC_DATA_NONE;
3212 return cdo->generic_packet(cdi, cgc);
3213}
3214
3215static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3216 struct packet_command *cgc,
3217 int cmd)
3218{
3219 const struct cdrom_device_ops *cdo = cdi->ops;
3220 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3221 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3222 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3223 cgc->data_direction = CGC_DATA_NONE;
3224 return cdo->generic_packet(cdi, cgc);
3225}
3226
3227static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3228 void __user *arg,
3229 struct packet_command *cgc)
3230{
3231 int ret;
3232 dvd_struct *s;
3233 int size = sizeof(dvd_struct);
3234
3235 if (!CDROM_CAN(CDC_DVD))
3236 return -ENOSYS;
3237
3238 s = memdup_user(arg, size);
3239 if (IS_ERR(s))
3240 return PTR_ERR(s);
3241
3242 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3243
3244 ret = dvd_read_struct(cdi, s, cgc);
3245 if (ret)
3246 goto out;
3247
3248 if (copy_to_user(arg, s, size))
3249 ret = -EFAULT;
3250out:
3251 kfree(s);
3252 return ret;
3253}
3254
3255static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3256 void __user *arg)
3257{
3258 int ret;
3259 dvd_authinfo ai;
3260 if (!CDROM_CAN(CDC_DVD))
3261 return -ENOSYS;
3262 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3263 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3264 return -EFAULT;
3265 ret = dvd_do_auth(cdi, &ai);
3266 if (ret)
3267 return ret;
3268 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3269 return -EFAULT;
3270 return 0;
3271}
3272
3273static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3274 void __user *arg)
3275{
3276 int ret;
3277 long next = 0;
3278 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3279 ret = cdrom_get_next_writable(cdi, &next);
3280 if (ret)
3281 return ret;
3282 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3283 return -EFAULT;
3284 return 0;
3285}
3286
3287static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3288 void __user *arg)
3289{
3290 int ret;
3291 long last = 0;
3292 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3293 ret = cdrom_get_last_written(cdi, &last);
3294 if (ret)
3295 return ret;
3296 if (in_compat_syscall())
3297 return put_user(last, (__s32 __user *)arg);
3298
3299 return put_user(last, (long __user *)arg);
3300}
3301
3302static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3303 unsigned long arg)
3304{
3305 struct packet_command cgc;
3306 void __user *userptr = (void __user *)arg;
3307
3308 memset(&cgc, 0, sizeof(cgc));
3309
3310 /* build a unified command and queue it through
3311 cdo->generic_packet() */
3312 switch (cmd) {
3313 case CDROMREADRAW:
3314 case CDROMREADMODE1:
3315 case CDROMREADMODE2:
3316 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3317 case CDROMREADAUDIO:
3318 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3319 case CDROMSUBCHNL:
3320 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3321 case CDROMPLAYMSF:
3322 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3323 case CDROMPLAYBLK:
3324 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3325 case CDROMVOLCTRL:
3326 case CDROMVOLREAD:
3327 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3328 case CDROMSTART:
3329 case CDROMSTOP:
3330 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3331 case CDROMPAUSE:
3332 case CDROMRESUME:
3333 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3334 case DVD_READ_STRUCT:
3335 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3336 case DVD_AUTH:
3337 return mmc_ioctl_dvd_auth(cdi, userptr);
3338 case CDROM_NEXT_WRITABLE:
3339 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3340 case CDROM_LAST_WRITTEN:
3341 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3342 }
3343
3344 return -ENOTTY;
3345}
3346
3347/*
3348 * Just about every imaginable ioctl is supported in the Uniform layer
3349 * these days.
3350 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3351 */
3352int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3353 fmode_t mode, unsigned int cmd, unsigned long arg)
3354{
3355 void __user *argp = (void __user *)arg;
3356 int ret;
3357
3358 /*
3359 * Try the generic SCSI command ioctl's first.
3360 */
3361 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3362 if (ret != -ENOTTY)
3363 return ret;
3364
3365 switch (cmd) {
3366 case CDROMMULTISESSION:
3367 return cdrom_ioctl_multisession(cdi, argp);
3368 case CDROMEJECT:
3369 return cdrom_ioctl_eject(cdi);
3370 case CDROMCLOSETRAY:
3371 return cdrom_ioctl_closetray(cdi);
3372 case CDROMEJECT_SW:
3373 return cdrom_ioctl_eject_sw(cdi, arg);
3374 case CDROM_MEDIA_CHANGED:
3375 return cdrom_ioctl_media_changed(cdi, arg);
3376 case CDROM_SET_OPTIONS:
3377 return cdrom_ioctl_set_options(cdi, arg);
3378 case CDROM_CLEAR_OPTIONS:
3379 return cdrom_ioctl_clear_options(cdi, arg);
3380 case CDROM_SELECT_SPEED:
3381 return cdrom_ioctl_select_speed(cdi, arg);
3382 case CDROM_SELECT_DISC:
3383 return cdrom_ioctl_select_disc(cdi, arg);
3384 case CDROMRESET:
3385 return cdrom_ioctl_reset(cdi, bdev);
3386 case CDROM_LOCKDOOR:
3387 return cdrom_ioctl_lock_door(cdi, arg);
3388 case CDROM_DEBUG:
3389 return cdrom_ioctl_debug(cdi, arg);
3390 case CDROM_GET_CAPABILITY:
3391 return cdrom_ioctl_get_capability(cdi);
3392 case CDROM_GET_MCN:
3393 return cdrom_ioctl_get_mcn(cdi, argp);
3394 case CDROM_DRIVE_STATUS:
3395 return cdrom_ioctl_drive_status(cdi, arg);
3396 case CDROM_DISC_STATUS:
3397 return cdrom_ioctl_disc_status(cdi);
3398 case CDROM_CHANGER_NSLOTS:
3399 return cdrom_ioctl_changer_nslots(cdi);
3400 }
3401
3402 /*
3403 * Use the ioctls that are implemented through the generic_packet()
3404 * interface. this may look at bit funny, but if -ENOTTY is
3405 * returned that particular ioctl is not implemented and we
3406 * let it go through the device specific ones.
3407 */
3408 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3409 ret = mmc_ioctl(cdi, cmd, arg);
3410 if (ret != -ENOTTY)
3411 return ret;
3412 }
3413
3414 /*
3415 * Note: most of the cd_dbg() calls are commented out here,
3416 * because they fill up the sys log when CD players poll
3417 * the drive.
3418 */
3419 switch (cmd) {
3420 case CDROMSUBCHNL:
3421 return cdrom_ioctl_get_subchnl(cdi, argp);
3422 case CDROMREADTOCHDR:
3423 return cdrom_ioctl_read_tochdr(cdi, argp);
3424 case CDROMREADTOCENTRY:
3425 return cdrom_ioctl_read_tocentry(cdi, argp);
3426 case CDROMPLAYMSF:
3427 return cdrom_ioctl_play_msf(cdi, argp);
3428 case CDROMPLAYTRKIND:
3429 return cdrom_ioctl_play_trkind(cdi, argp);
3430 case CDROMVOLCTRL:
3431 return cdrom_ioctl_volctrl(cdi, argp);
3432 case CDROMVOLREAD:
3433 return cdrom_ioctl_volread(cdi, argp);
3434 case CDROMSTART:
3435 case CDROMSTOP:
3436 case CDROMPAUSE:
3437 case CDROMRESUME:
3438 return cdrom_ioctl_audioctl(cdi, cmd);
3439 }
3440
3441 return -ENOSYS;
3442}
3443
3444EXPORT_SYMBOL(cdrom_get_last_written);
3445EXPORT_SYMBOL(register_cdrom);
3446EXPORT_SYMBOL(unregister_cdrom);
3447EXPORT_SYMBOL(cdrom_open);
3448EXPORT_SYMBOL(cdrom_release);
3449EXPORT_SYMBOL(cdrom_ioctl);
3450EXPORT_SYMBOL(cdrom_number_of_slots);
3451EXPORT_SYMBOL(cdrom_mode_select);
3452EXPORT_SYMBOL(cdrom_mode_sense);
3453EXPORT_SYMBOL(init_cdrom_command);
3454EXPORT_SYMBOL(cdrom_get_media_event);
3455
3456#ifdef CONFIG_SYSCTL
3457
3458#define CDROM_STR_SIZE 1000
3459
3460static struct cdrom_sysctl_settings {
3461 char info[CDROM_STR_SIZE]; /* general info */
3462 int autoclose; /* close tray upon mount, etc */
3463 int autoeject; /* eject on umount */
3464 int debug; /* turn on debugging messages */
3465 int lock; /* lock the door on device open */
3466 int check; /* check media type */
3467} cdrom_sysctl_settings;
3468
3469enum cdrom_print_option {
3470 CTL_NAME,
3471 CTL_SPEED,
3472 CTL_SLOTS,
3473 CTL_CAPABILITY
3474};
3475
3476static int cdrom_print_info(const char *header, int val, char *info,
3477 int *pos, enum cdrom_print_option option)
3478{
3479 const int max_size = sizeof(cdrom_sysctl_settings.info);
3480 struct cdrom_device_info *cdi;
3481 int ret;
3482
3483 ret = scnprintf(info + *pos, max_size - *pos, header);
3484 if (!ret)
3485 return 1;
3486
3487 *pos += ret;
3488
3489 list_for_each_entry(cdi, &cdrom_list, list) {
3490 switch (option) {
3491 case CTL_NAME:
3492 ret = scnprintf(info + *pos, max_size - *pos,
3493 "\t%s", cdi->name);
3494 break;
3495 case CTL_SPEED:
3496 ret = scnprintf(info + *pos, max_size - *pos,
3497 "\t%d", cdi->speed);
3498 break;
3499 case CTL_SLOTS:
3500 ret = scnprintf(info + *pos, max_size - *pos,
3501 "\t%d", cdi->capacity);
3502 break;
3503 case CTL_CAPABILITY:
3504 ret = scnprintf(info + *pos, max_size - *pos,
3505 "\t%d", CDROM_CAN(val) != 0);
3506 break;
3507 default:
3508 pr_info("invalid option%d\n", option);
3509 return 1;
3510 }
3511 if (!ret)
3512 return 1;
3513 *pos += ret;
3514 }
3515
3516 return 0;
3517}
3518
3519static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3520 void *buffer, size_t *lenp, loff_t *ppos)
3521{
3522 int pos;
3523 char *info = cdrom_sysctl_settings.info;
3524 const int max_size = sizeof(cdrom_sysctl_settings.info);
3525
3526 if (!*lenp || (*ppos && !write)) {
3527 *lenp = 0;
3528 return 0;
3529 }
3530
3531 mutex_lock(&cdrom_mutex);
3532
3533 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3534
3535 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3536 goto done;
3537 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3538 goto done;
3539 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3540 goto done;
3541 if (cdrom_print_info("\nCan close tray:\t",
3542 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3543 goto done;
3544 if (cdrom_print_info("\nCan open tray:\t",
3545 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3546 goto done;
3547 if (cdrom_print_info("\nCan lock tray:\t",
3548 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3549 goto done;
3550 if (cdrom_print_info("\nCan change speed:",
3551 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3552 goto done;
3553 if (cdrom_print_info("\nCan select disk:",
3554 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3555 goto done;
3556 if (cdrom_print_info("\nCan read multisession:",
3557 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3558 goto done;
3559 if (cdrom_print_info("\nCan read MCN:\t",
3560 CDC_MCN, info, &pos, CTL_CAPABILITY))
3561 goto done;
3562 if (cdrom_print_info("\nReports media changed:",
3563 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3564 goto done;
3565 if (cdrom_print_info("\nCan play audio:\t",
3566 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3567 goto done;
3568 if (cdrom_print_info("\nCan write CD-R:\t",
3569 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3570 goto done;
3571 if (cdrom_print_info("\nCan write CD-RW:",
3572 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3573 goto done;
3574 if (cdrom_print_info("\nCan read DVD:\t",
3575 CDC_DVD, info, &pos, CTL_CAPABILITY))
3576 goto done;
3577 if (cdrom_print_info("\nCan write DVD-R:",
3578 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3579 goto done;
3580 if (cdrom_print_info("\nCan write DVD-RAM:",
3581 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3582 goto done;
3583 if (cdrom_print_info("\nCan read MRW:\t",
3584 CDC_MRW, info, &pos, CTL_CAPABILITY))
3585 goto done;
3586 if (cdrom_print_info("\nCan write MRW:\t",
3587 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3588 goto done;
3589 if (cdrom_print_info("\nCan write RAM:\t",
3590 CDC_RAM, info, &pos, CTL_CAPABILITY))
3591 goto done;
3592 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3593 goto done;
3594doit:
3595 mutex_unlock(&cdrom_mutex);
3596 return proc_dostring(ctl, write, buffer, lenp, ppos);
3597done:
3598 pr_info("info buffer too small\n");
3599 goto doit;
3600}
3601
3602/* Unfortunately, per device settings are not implemented through
3603 procfs/sysctl yet. When they are, this will naturally disappear. For now
3604 just update all drives. Later this will become the template on which
3605 new registered drives will be based. */
3606static void cdrom_update_settings(void)
3607{
3608 struct cdrom_device_info *cdi;
3609
3610 mutex_lock(&cdrom_mutex);
3611 list_for_each_entry(cdi, &cdrom_list, list) {
3612 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3613 cdi->options |= CDO_AUTO_CLOSE;
3614 else if (!autoclose)
3615 cdi->options &= ~CDO_AUTO_CLOSE;
3616 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3617 cdi->options |= CDO_AUTO_EJECT;
3618 else if (!autoeject)
3619 cdi->options &= ~CDO_AUTO_EJECT;
3620 if (lockdoor && CDROM_CAN(CDC_LOCK))
3621 cdi->options |= CDO_LOCK;
3622 else if (!lockdoor)
3623 cdi->options &= ~CDO_LOCK;
3624 if (check_media_type)
3625 cdi->options |= CDO_CHECK_TYPE;
3626 else
3627 cdi->options &= ~CDO_CHECK_TYPE;
3628 }
3629 mutex_unlock(&cdrom_mutex);
3630}
3631
3632static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3633 void *buffer, size_t *lenp, loff_t *ppos)
3634{
3635 int ret;
3636
3637 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3638
3639 if (write) {
3640
3641 /* we only care for 1 or 0. */
3642 autoclose = !!cdrom_sysctl_settings.autoclose;
3643 autoeject = !!cdrom_sysctl_settings.autoeject;
3644 debug = !!cdrom_sysctl_settings.debug;
3645 lockdoor = !!cdrom_sysctl_settings.lock;
3646 check_media_type = !!cdrom_sysctl_settings.check;
3647
3648 /* update the option flags according to the changes. we
3649 don't have per device options through sysctl yet,
3650 but we will have and then this will disappear. */
3651 cdrom_update_settings();
3652 }
3653
3654 return ret;
3655}
3656
3657/* Place files in /proc/sys/dev/cdrom */
3658static struct ctl_table cdrom_table[] = {
3659 {
3660 .procname = "info",
3661 .data = &cdrom_sysctl_settings.info,
3662 .maxlen = CDROM_STR_SIZE,
3663 .mode = 0444,
3664 .proc_handler = cdrom_sysctl_info,
3665 },
3666 {
3667 .procname = "autoclose",
3668 .data = &cdrom_sysctl_settings.autoclose,
3669 .maxlen = sizeof(int),
3670 .mode = 0644,
3671 .proc_handler = cdrom_sysctl_handler,
3672 },
3673 {
3674 .procname = "autoeject",
3675 .data = &cdrom_sysctl_settings.autoeject,
3676 .maxlen = sizeof(int),
3677 .mode = 0644,
3678 .proc_handler = cdrom_sysctl_handler,
3679 },
3680 {
3681 .procname = "debug",
3682 .data = &cdrom_sysctl_settings.debug,
3683 .maxlen = sizeof(int),
3684 .mode = 0644,
3685 .proc_handler = cdrom_sysctl_handler,
3686 },
3687 {
3688 .procname = "lock",
3689 .data = &cdrom_sysctl_settings.lock,
3690 .maxlen = sizeof(int),
3691 .mode = 0644,
3692 .proc_handler = cdrom_sysctl_handler,
3693 },
3694 {
3695 .procname = "check_media",
3696 .data = &cdrom_sysctl_settings.check,
3697 .maxlen = sizeof(int),
3698 .mode = 0644,
3699 .proc_handler = cdrom_sysctl_handler
3700 },
3701 { }
3702};
3703
3704static struct ctl_table cdrom_cdrom_table[] = {
3705 {
3706 .procname = "cdrom",
3707 .maxlen = 0,
3708 .mode = 0555,
3709 .child = cdrom_table,
3710 },
3711 { }
3712};
3713
3714/* Make sure that /proc/sys/dev is there */
3715static struct ctl_table cdrom_root_table[] = {
3716 {
3717 .procname = "dev",
3718 .maxlen = 0,
3719 .mode = 0555,
3720 .child = cdrom_cdrom_table,
3721 },
3722 { }
3723};
3724static struct ctl_table_header *cdrom_sysctl_header;
3725
3726static void cdrom_sysctl_register(void)
3727{
3728 static atomic_t initialized = ATOMIC_INIT(0);
3729
3730 if (!atomic_add_unless(&initialized, 1, 1))
3731 return;
3732
3733 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3734
3735 /* set the defaults */
3736 cdrom_sysctl_settings.autoclose = autoclose;
3737 cdrom_sysctl_settings.autoeject = autoeject;
3738 cdrom_sysctl_settings.debug = debug;
3739 cdrom_sysctl_settings.lock = lockdoor;
3740 cdrom_sysctl_settings.check = check_media_type;
3741}
3742
3743static void cdrom_sysctl_unregister(void)
3744{
3745 if (cdrom_sysctl_header)
3746 unregister_sysctl_table(cdrom_sysctl_header);
3747}
3748
3749#else /* CONFIG_SYSCTL */
3750
3751static void cdrom_sysctl_register(void)
3752{
3753}
3754
3755static void cdrom_sysctl_unregister(void)
3756{
3757}
3758
3759#endif /* CONFIG_SYSCTL */
3760
3761static int __init cdrom_init(void)
3762{
3763 cdrom_sysctl_register();
3764
3765 return 0;
3766}
3767
3768static void __exit cdrom_exit(void)
3769{
3770 pr_info("Uniform CD-ROM driver unloaded\n");
3771 cdrom_sysctl_unregister();
3772}
3773
3774module_init(cdrom_init);
3775module_exit(cdrom_exit);
3776MODULE_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.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");