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