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