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1/* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.rst for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to actively
34 maintain and improve this driver, I am now carrying on the torch. If
35 you have a problem with this driver, please feel free to contact me.
36
37 -- Added (rudimentary) sysctl interface. I realize this is really weak
38 right now, and is _very_ badly implemented. It will be improved...
39
40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
41 the Uniform CD-ROM driver via the cdrom_count_tracks function.
42 The cdrom_count_tracks function helps resolve some of the false
43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
44 for the correct media type when mounting or playing audio from a CD.
45
46 -- Remove the calls to verify_area and only use the copy_from_user and
47 copy_to_user stuff, since these calls now provide their own memory
48 checking with the 2.1.x kernels.
49
50 -- Major update to return codes so that errors from low-level drivers
51 are passed on through (thanks to Gerd Knorr for pointing out this
52 problem).
53
54 -- Made it so if a function isn't implemented in a low-level driver,
55 ENOSYS is now returned instead of EINVAL.
56
57 -- Simplified some complex logic so that the source code is easier to read.
58
59 -- Other stuff I probably forgot to mention (lots of changes).
60
612.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
63
642.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
66 copy_*_user does not return EFAULT on error, but instead returns the number
67 of bytes not copied. I was returning whatever non-zero stuff came back from
68 the copy_*_user functions directly, which would result in strange errors.
69
702.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
73 this out and providing a simple fix.
74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
75 thanks to Andrea Arcangeli
76 -- Fixed it so that the /proc entry now also shows up when cdrom is
77 compiled into the kernel. Before it only worked when loaded as a module.
78
79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
80 -- Fixed a bug in cdrom_media_changed and handling of reporting that
81 the media had changed for devices that _don't_ implement media_changed.
82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
83 -- Made a few things more pedanticly correct.
84
852.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
86 -- New maintainers! Erik was too busy to continue the work on the driver,
87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
88 will do their best to follow in his footsteps
89
90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
91 -- Check if drive is capable of doing what we ask before blindly changing
92 cdi->options in various ioctl.
93 -- Added version to proc entry.
94
95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixed an error in open_for_data where we would sometimes not return
97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
98 -- Fixed module usage count - usage was based on /proc/sys/dev
99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
101 dev would be removed even though it was used. cdrom.c just illuminated
102 that bug.
103
104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
106 been "rewritten" because capabilities and options aren't in sync. They
107 should be...
108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
109 -- Added CDROM_RESET ioctl.
110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
112 from parsing /proc/sys/dev/cdrom/info.
113
114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
115 -- Check capability mask from low level driver when counting tracks as
116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
117
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
120 CDC_CLOSE_TRAY.
121 -- proc info didn't mask against capabilities mask.
122
123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
125 code was duplicated before. Drives that support the generic packet
126 interface are now being fed packets from here instead.
127 -- First attempt at adding support for MMC2 commands - for DVD and
128 CD-R(W) drives. Only the DVD parts are in now - the interface used is
129 the same as for the audio ioctls.
130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
131 a change to perform device specific ioctls as well.
132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
133 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
134 and lock.
135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
136 CD-Rx and DVD capabilities.
137 -- Now default to checking media type.
138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
139 doing this anyway, with the generic_packet addition.
140
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
143 correctly.
144 -- Fix up ioctl handling so the device specific ones actually get
145 called :).
146
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
149 page).
150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
151 <andrewtv@usa.net> for telling me and for having defined the various
152 DVD structures and ioctls in the first place! He designed the original
153 DVD patches for ide-cd and while I rearranged and unified them, the
154 interface is still the same.
155
156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
159 -- Moved the CDROMREADxxx ioctls in here.
160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
161 and exported functions.
162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
163 to now read GPCMD_ for the new generic packet interface. All low level
164 drivers are updated as well.
165 -- Various other cleanups.
166
167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
168 -- Fixed a couple of possible memory leaks (if an operation failed and
169 we didn't free the buffer before returning the error).
170 -- Integrated Uniform CD Changer handling from Richard Sharman
171 <rsharman@pobox.com>.
172 -- Defined CD_DVD and CD_CHANGER log levels.
173 -- Fixed the CDROMREADxxx ioctls.
174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
175 drives supported it. We lose the index part, however.
176 -- Small modifications to accommodate opens of /dev/hdc1, required
177 for ide-cd to handle multisession discs.
178 -- Export cdrom_mode_sense and cdrom_mode_select.
179 -- init_cdrom_command() for setting up a cgc command.
180
181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
183 impossible to send the drive data in a sensible way.
184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
185 dvd_read_manufact.
186 -- Added setup of write mode for packet writing.
187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
188 number of frames and split the reads in blocks of 8.
189
190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
191 -- Added support for changing the region of DVD drives.
192 -- Added sense data to generic command.
193
194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
195 -- Do same "read header length" trick in cdrom_get_disc_info() as
196 we do in cdrom_get_track_info() -- some drive don't obey specs and
197 fail if they can't supply the full Mt Fuji size table.
198 -- Deleted stuff related to setting up write modes. It has a different
199 home now.
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
202
203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
204 -- Fix direction flag in setup_send_key and setup_report_key. This
205 gave some SCSI adapters problems.
206 -- Always return -EROFS for write opens
207 -- Convert to module_init/module_exit style init and remove some
208 of the #ifdef MODULE stuff
209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
212 did not clear a 0 sized buffer.
213
214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
216 that case switch block size and issue plain READ_10 again, then switch
217 back.
218
219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
220 -- Fix volume control on CD's - old SCSI-II drives now use their own
221 code, as doing MODE6 stuff in here is really not my intention.
222 -- Use READ_DISC_INFO for more reliable end-of-disc.
223
224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
225 -- Fix bug in getting rpc phase 2 region info.
226 -- Reinstate "correct" CDROMPLAYTRKIND
227
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
230
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
233 -- Locking fixes
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
236
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
239
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
242
243-------------------------------------------------------------------------*/
244
245#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
246
247#define REVISION "Revision: 3.20"
248#define VERSION "Id: cdrom.c 3.20 2003/12/17"
249
250/* I use an error-log mask to give fine grain control over the type of
251 messages dumped to the system logs. The available masks include: */
252#define CD_NOTHING 0x0
253#define CD_WARNING 0x1
254#define CD_REG_UNREG 0x2
255#define CD_DO_IOCTL 0x4
256#define CD_OPEN 0x8
257#define CD_CLOSE 0x10
258#define CD_COUNT_TRACKS 0x20
259#define CD_CHANGER 0x40
260#define CD_DVD 0x80
261
262/* Define this to remove _all_ the debugging messages */
263/* #define ERRLOGMASK CD_NOTHING */
264#define ERRLOGMASK CD_WARNING
265/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
266/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
267
268#include <linux/atomic.h>
269#include <linux/module.h>
270#include <linux/fs.h>
271#include <linux/major.h>
272#include <linux/types.h>
273#include <linux/errno.h>
274#include <linux/kernel.h>
275#include <linux/mm.h>
276#include <linux/slab.h>
277#include <linux/cdrom.h>
278#include <linux/sysctl.h>
279#include <linux/proc_fs.h>
280#include <linux/blkpg.h>
281#include <linux/init.h>
282#include <linux/fcntl.h>
283#include <linux/blkdev.h>
284#include <linux/times.h>
285#include <linux/uaccess.h>
286#include <scsi/scsi_common.h>
287#include <scsi/scsi_request.h>
288
289/* used to tell the module to turn on full debugging messages */
290static bool debug;
291/* default compatibility mode */
292static bool autoclose=1;
293static bool autoeject;
294static bool lockdoor = 1;
295/* will we ever get to use this... sigh. */
296static bool check_media_type;
297/* automatically restart mrw format */
298static bool mrw_format_restart = 1;
299module_param(debug, bool, 0);
300module_param(autoclose, bool, 0);
301module_param(autoeject, bool, 0);
302module_param(lockdoor, bool, 0);
303module_param(check_media_type, bool, 0);
304module_param(mrw_format_restart, bool, 0);
305
306static DEFINE_MUTEX(cdrom_mutex);
307
308static const char *mrw_format_status[] = {
309 "not mrw",
310 "bgformat inactive",
311 "bgformat active",
312 "mrw complete",
313};
314
315static const char *mrw_address_space[] = { "DMA", "GAA" };
316
317#if (ERRLOGMASK != CD_NOTHING)
318#define cd_dbg(type, fmt, ...) \
319do { \
320 if ((ERRLOGMASK & type) || debug == 1) \
321 pr_debug(fmt, ##__VA_ARGS__); \
322} while (0)
323#else
324#define cd_dbg(type, fmt, ...) \
325do { \
326 if (0 && (ERRLOGMASK & type) || debug == 1) \
327 pr_debug(fmt, ##__VA_ARGS__); \
328} while (0)
329#endif
330
331/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
332 a lot of places. This macro makes the code more clear. */
333#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
334
335/*
336 * Another popular OS uses 7 seconds as the hard timeout for default
337 * commands, so it is a good choice for us as well.
338 */
339#define CDROM_DEF_TIMEOUT (7 * HZ)
340
341/* Not-exported routines. */
342
343static void cdrom_sysctl_register(void);
344
345static LIST_HEAD(cdrom_list);
346
347int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
348 struct packet_command *cgc)
349{
350 if (cgc->sshdr) {
351 cgc->sshdr->sense_key = 0x05;
352 cgc->sshdr->asc = 0x20;
353 cgc->sshdr->ascq = 0x00;
354 }
355
356 cgc->stat = -EIO;
357 return -EIO;
358}
359EXPORT_SYMBOL(cdrom_dummy_generic_packet);
360
361static int cdrom_flush_cache(struct cdrom_device_info *cdi)
362{
363 struct packet_command cgc;
364
365 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
366 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
367
368 cgc.timeout = 5 * 60 * HZ;
369
370 return cdi->ops->generic_packet(cdi, &cgc);
371}
372
373/* requires CD R/RW */
374static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
375 disc_information *di)
376{
377 const struct cdrom_device_ops *cdo = cdi->ops;
378 struct packet_command cgc;
379 int ret, buflen;
380
381 /* set up command and get the disc info */
382 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
383 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
384 cgc.cmd[8] = cgc.buflen = 2;
385 cgc.quiet = 1;
386
387 ret = cdo->generic_packet(cdi, &cgc);
388 if (ret)
389 return ret;
390
391 /* not all drives have the same disc_info length, so requeue
392 * packet with the length the drive tells us it can supply
393 */
394 buflen = be16_to_cpu(di->disc_information_length) +
395 sizeof(di->disc_information_length);
396
397 if (buflen > sizeof(disc_information))
398 buflen = sizeof(disc_information);
399
400 cgc.cmd[8] = cgc.buflen = buflen;
401 ret = cdo->generic_packet(cdi, &cgc);
402 if (ret)
403 return ret;
404
405 /* return actual fill size */
406 return buflen;
407}
408
409/* This macro makes sure we don't have to check on cdrom_device_ops
410 * existence in the run-time routines below. Change_capability is a
411 * hack to have the capability flags defined const, while we can still
412 * change it here without gcc complaining at every line.
413 */
414#define ENSURE(cdo, call, bits) \
415do { \
416 if (cdo->call == NULL) \
417 WARN_ON_ONCE((cdo)->capability & (bits)); \
418} while (0)
419
420/*
421 * the first prototypes used 0x2c as the page code for the mrw mode page,
422 * subsequently this was changed to 0x03. probe the one used by this drive
423 */
424static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
425{
426 struct packet_command cgc;
427 char buffer[16];
428
429 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
430
431 cgc.timeout = HZ;
432 cgc.quiet = 1;
433
434 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
435 cdi->mrw_mode_page = MRW_MODE_PC;
436 return 0;
437 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
438 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
439 return 0;
440 }
441
442 return 1;
443}
444
445static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
446{
447 struct packet_command cgc;
448 struct mrw_feature_desc *mfd;
449 unsigned char buffer[16];
450 int ret;
451
452 *write = 0;
453
454 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
455
456 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
457 cgc.cmd[3] = CDF_MRW;
458 cgc.cmd[8] = sizeof(buffer);
459 cgc.quiet = 1;
460
461 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
462 return ret;
463
464 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
465 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
466 return 1;
467 *write = mfd->write;
468
469 if ((ret = cdrom_mrw_probe_pc(cdi))) {
470 *write = 0;
471 return ret;
472 }
473
474 return 0;
475}
476
477static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
478{
479 struct packet_command cgc;
480 unsigned char buffer[12];
481 int ret;
482
483 pr_info("%sstarting format\n", cont ? "Re" : "");
484
485 /*
486 * FmtData bit set (bit 4), format type is 1
487 */
488 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
489 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
490 cgc.cmd[1] = (1 << 4) | 1;
491
492 cgc.timeout = 5 * 60 * HZ;
493
494 /*
495 * 4 byte format list header, 8 byte format list descriptor
496 */
497 buffer[1] = 1 << 1;
498 buffer[3] = 8;
499
500 /*
501 * nr_blocks field
502 */
503 buffer[4] = 0xff;
504 buffer[5] = 0xff;
505 buffer[6] = 0xff;
506 buffer[7] = 0xff;
507
508 buffer[8] = 0x24 << 2;
509 buffer[11] = cont;
510
511 ret = cdi->ops->generic_packet(cdi, &cgc);
512 if (ret)
513 pr_info("bgformat failed\n");
514
515 return ret;
516}
517
518static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
519{
520 struct packet_command cgc;
521
522 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
523 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
524
525 /*
526 * Session = 1, Track = 0
527 */
528 cgc.cmd[1] = !!immed;
529 cgc.cmd[2] = 1 << 1;
530
531 cgc.timeout = 5 * 60 * HZ;
532
533 return cdi->ops->generic_packet(cdi, &cgc);
534}
535
536static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
537{
538 disc_information di;
539 int ret;
540
541 ret = cdrom_get_disc_info(cdi, &di);
542 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
543 return 1;
544
545 ret = 0;
546 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
547 pr_info("issuing MRW background format suspend\n");
548 ret = cdrom_mrw_bgformat_susp(cdi, 0);
549 }
550
551 if (!ret && cdi->media_written)
552 ret = cdrom_flush_cache(cdi);
553
554 return ret;
555}
556
557static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
558{
559 struct packet_command cgc;
560 struct mode_page_header *mph;
561 char buffer[16];
562 int ret, offset, size;
563
564 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
565
566 cgc.buffer = buffer;
567 cgc.buflen = sizeof(buffer);
568
569 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
570 if (ret)
571 return ret;
572
573 mph = (struct mode_page_header *)buffer;
574 offset = be16_to_cpu(mph->desc_length);
575 size = be16_to_cpu(mph->mode_data_length) + 2;
576
577 buffer[offset + 3] = space;
578 cgc.buflen = size;
579
580 ret = cdrom_mode_select(cdi, &cgc);
581 if (ret)
582 return ret;
583
584 pr_info("%s: mrw address space %s selected\n",
585 cdi->name, mrw_address_space[space]);
586 return 0;
587}
588
589int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi)
590{
591 static char banner_printed;
592 const struct cdrom_device_ops *cdo = cdi->ops;
593
594 cd_dbg(CD_OPEN, "entering register_cdrom\n");
595
596 if (cdo->open == NULL || cdo->release == NULL)
597 return -EINVAL;
598 if (!banner_printed) {
599 pr_info("Uniform CD-ROM driver " REVISION "\n");
600 banner_printed = 1;
601 cdrom_sysctl_register();
602 }
603
604 cdi->disk = disk;
605 disk->cdi = cdi;
606
607 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
608 if (cdo->check_events == NULL)
609 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
610 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
611 ENSURE(cdo, lock_door, CDC_LOCK);
612 ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
613 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
614 ENSURE(cdo, get_mcn, CDC_MCN);
615 ENSURE(cdo, reset, CDC_RESET);
616 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
617 cdi->mc_flags = 0;
618 cdi->options = CDO_USE_FFLAGS;
619
620 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
621 cdi->options |= (int) CDO_AUTO_CLOSE;
622 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
623 cdi->options |= (int) CDO_AUTO_EJECT;
624 if (lockdoor == 1)
625 cdi->options |= (int) CDO_LOCK;
626 if (check_media_type == 1)
627 cdi->options |= (int) CDO_CHECK_TYPE;
628
629 if (CDROM_CAN(CDC_MRW_W))
630 cdi->exit = cdrom_mrw_exit;
631
632 if (cdi->disk)
633 cdi->cdda_method = CDDA_BPC_FULL;
634 else
635 cdi->cdda_method = CDDA_OLD;
636
637 WARN_ON(!cdo->generic_packet);
638
639 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
640 mutex_lock(&cdrom_mutex);
641 list_add(&cdi->list, &cdrom_list);
642 mutex_unlock(&cdrom_mutex);
643 return 0;
644}
645#undef ENSURE
646
647void unregister_cdrom(struct cdrom_device_info *cdi)
648{
649 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
650
651 mutex_lock(&cdrom_mutex);
652 list_del(&cdi->list);
653 mutex_unlock(&cdrom_mutex);
654
655 if (cdi->exit)
656 cdi->exit(cdi);
657
658 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
659}
660
661int cdrom_get_media_event(struct cdrom_device_info *cdi,
662 struct media_event_desc *med)
663{
664 struct packet_command cgc;
665 unsigned char buffer[8];
666 struct event_header *eh = (struct event_header *)buffer;
667
668 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
669 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
670 cgc.cmd[1] = 1; /* IMMED */
671 cgc.cmd[4] = 1 << 4; /* media event */
672 cgc.cmd[8] = sizeof(buffer);
673 cgc.quiet = 1;
674
675 if (cdi->ops->generic_packet(cdi, &cgc))
676 return 1;
677
678 if (be16_to_cpu(eh->data_len) < sizeof(*med))
679 return 1;
680
681 if (eh->nea || eh->notification_class != 0x4)
682 return 1;
683
684 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
685 return 0;
686}
687
688static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
689 struct rwrt_feature_desc *rfd)
690{
691 struct packet_command cgc;
692 char buffer[24];
693 int ret;
694
695 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
696
697 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
698 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
699 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
700 cgc.quiet = 1;
701
702 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
703 return ret;
704
705 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
706 return 0;
707}
708
709static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
710{
711 struct packet_command cgc;
712 char buffer[16];
713 __be16 *feature_code;
714 int ret;
715
716 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
717
718 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
719 cgc.cmd[3] = CDF_HWDM;
720 cgc.cmd[8] = sizeof(buffer);
721 cgc.quiet = 1;
722
723 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
724 return ret;
725
726 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
727 if (be16_to_cpu(*feature_code) == CDF_HWDM)
728 return 0;
729
730 return 1;
731}
732
733
734static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
735{
736 struct rwrt_feature_desc rfd;
737 int ret;
738
739 *write = 0;
740
741 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
742 return ret;
743
744 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
745 *write = 1;
746
747 return 0;
748}
749
750static int cdrom_media_erasable(struct cdrom_device_info *cdi)
751{
752 disc_information di;
753 int ret;
754
755 ret = cdrom_get_disc_info(cdi, &di);
756 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
757 return -1;
758
759 return di.erasable;
760}
761
762/*
763 * FIXME: check RO bit
764 */
765static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
766{
767 int ret = cdrom_media_erasable(cdi);
768
769 /*
770 * allow writable open if media info read worked and media is
771 * erasable, _or_ if it fails since not all drives support it
772 */
773 if (!ret)
774 return 1;
775
776 return 0;
777}
778
779static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
780{
781 disc_information di;
782 int ret;
783
784 /*
785 * always reset to DMA lba space on open
786 */
787 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
788 pr_err("failed setting lba address space\n");
789 return 1;
790 }
791
792 ret = cdrom_get_disc_info(cdi, &di);
793 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
794 return 1;
795
796 if (!di.erasable)
797 return 1;
798
799 /*
800 * mrw_status
801 * 0 - not MRW formatted
802 * 1 - MRW bgformat started, but not running or complete
803 * 2 - MRW bgformat in progress
804 * 3 - MRW formatting complete
805 */
806 ret = 0;
807 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
808 if (!di.mrw_status)
809 ret = 1;
810 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
811 mrw_format_restart)
812 ret = cdrom_mrw_bgformat(cdi, 1);
813
814 return ret;
815}
816
817static int mo_open_write(struct cdrom_device_info *cdi)
818{
819 struct packet_command cgc;
820 char buffer[255];
821 int ret;
822
823 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
824 cgc.quiet = 1;
825
826 /*
827 * obtain write protect information as per
828 * drivers/scsi/sd.c:sd_read_write_protect_flag
829 */
830
831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
832 if (ret)
833 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
834 if (ret) {
835 cgc.buflen = 255;
836 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
837 }
838
839 /* drive gave us no info, let the user go ahead */
840 if (ret)
841 return 0;
842
843 return buffer[3] & 0x80;
844}
845
846static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
847{
848 struct rwrt_feature_desc rfd;
849 int ret;
850
851 if ((ret = cdrom_has_defect_mgt(cdi)))
852 return ret;
853
854 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
855 return ret;
856 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
857 ret = !rfd.curr;
858
859 cd_dbg(CD_OPEN, "can open for random write\n");
860 return ret;
861}
862
863static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
864{
865 struct packet_command cgc;
866 char buffer[32];
867 int ret, mmc3_profile;
868
869 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
870
871 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
872 cgc.cmd[1] = 0;
873 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
874 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
875 cgc.quiet = 1;
876
877 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
878 mmc3_profile = 0xffff;
879 else
880 mmc3_profile = (buffer[6] << 8) | buffer[7];
881
882 cdi->mmc3_profile = mmc3_profile;
883}
884
885static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
886{
887 switch (cdi->mmc3_profile) {
888 case 0x12: /* DVD-RAM */
889 case 0x1A: /* DVD+RW */
890 case 0x43: /* BD-RE */
891 return 0;
892 default:
893 return 1;
894 }
895}
896
897/*
898 * returns 0 for ok to open write, non-0 to disallow
899 */
900static int cdrom_open_write(struct cdrom_device_info *cdi)
901{
902 int mrw, mrw_write, ram_write;
903 int ret = 1;
904
905 mrw = 0;
906 if (!cdrom_is_mrw(cdi, &mrw_write))
907 mrw = 1;
908
909 if (CDROM_CAN(CDC_MO_DRIVE))
910 ram_write = 1;
911 else
912 (void) cdrom_is_random_writable(cdi, &ram_write);
913
914 if (mrw)
915 cdi->mask &= ~CDC_MRW;
916 else
917 cdi->mask |= CDC_MRW;
918
919 if (mrw_write)
920 cdi->mask &= ~CDC_MRW_W;
921 else
922 cdi->mask |= CDC_MRW_W;
923
924 if (ram_write)
925 cdi->mask &= ~CDC_RAM;
926 else
927 cdi->mask |= CDC_RAM;
928
929 if (CDROM_CAN(CDC_MRW_W))
930 ret = cdrom_mrw_open_write(cdi);
931 else if (CDROM_CAN(CDC_DVD_RAM))
932 ret = cdrom_dvdram_open_write(cdi);
933 else if (CDROM_CAN(CDC_RAM) &&
934 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
935 ret = cdrom_ram_open_write(cdi);
936 else if (CDROM_CAN(CDC_MO_DRIVE))
937 ret = mo_open_write(cdi);
938 else if (!cdrom_is_dvd_rw(cdi))
939 ret = 0;
940
941 return ret;
942}
943
944static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
945{
946 struct packet_command cgc;
947
948 if (cdi->mmc3_profile != 0x1a) {
949 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
950 return;
951 }
952
953 if (!cdi->media_written) {
954 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
955 return;
956 }
957
958 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
959
960 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
961 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
962 cgc.timeout = 30*HZ;
963 cdi->ops->generic_packet(cdi, &cgc);
964
965 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
966 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
967 cgc.timeout = 3000*HZ;
968 cgc.quiet = 1;
969 cdi->ops->generic_packet(cdi, &cgc);
970
971 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
972 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
973 cgc.cmd[2] = 2; /* Close session */
974 cgc.quiet = 1;
975 cgc.timeout = 3000*HZ;
976 cdi->ops->generic_packet(cdi, &cgc);
977
978 cdi->media_written = 0;
979}
980
981static int cdrom_close_write(struct cdrom_device_info *cdi)
982{
983#if 0
984 return cdrom_flush_cache(cdi);
985#else
986 return 0;
987#endif
988}
989
990/* badly broken, I know. Is due for a fixup anytime. */
991static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
992{
993 struct cdrom_tochdr header;
994 struct cdrom_tocentry entry;
995 int ret, i;
996 tracks->data = 0;
997 tracks->audio = 0;
998 tracks->cdi = 0;
999 tracks->xa = 0;
1000 tracks->error = 0;
1001 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1002
1003 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1004 tracks->error = CDS_NO_INFO;
1005 return;
1006 }
1007
1008 /* Grab the TOC header so we can see how many tracks there are */
1009 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1010 if (ret) {
1011 if (ret == -ENOMEDIUM)
1012 tracks->error = CDS_NO_DISC;
1013 else
1014 tracks->error = CDS_NO_INFO;
1015 return;
1016 }
1017 /* check what type of tracks are on this disc */
1018 entry.cdte_format = CDROM_MSF;
1019 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1020 entry.cdte_track = i;
1021 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1022 tracks->error = CDS_NO_INFO;
1023 return;
1024 }
1025 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1026 if (entry.cdte_format == 0x10)
1027 tracks->cdi++;
1028 else if (entry.cdte_format == 0x20)
1029 tracks->xa++;
1030 else
1031 tracks->data++;
1032 } else {
1033 tracks->audio++;
1034 }
1035 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1036 i, entry.cdte_format, entry.cdte_ctrl);
1037 }
1038 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1039 header.cdth_trk1, tracks->audio, tracks->data,
1040 tracks->cdi, tracks->xa);
1041}
1042
1043static
1044int open_for_data(struct cdrom_device_info *cdi)
1045{
1046 int ret;
1047 const struct cdrom_device_ops *cdo = cdi->ops;
1048 tracktype tracks;
1049 cd_dbg(CD_OPEN, "entering open_for_data\n");
1050 /* Check if the driver can report drive status. If it can, we
1051 can do clever things. If it can't, well, we at least tried! */
1052 if (cdo->drive_status != NULL) {
1053 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1054 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1055 if (ret == CDS_TRAY_OPEN) {
1056 cd_dbg(CD_OPEN, "the tray is open...\n");
1057 /* can/may i close it? */
1058 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1059 cdi->options & CDO_AUTO_CLOSE) {
1060 cd_dbg(CD_OPEN, "trying to close the tray\n");
1061 ret=cdo->tray_move(cdi,0);
1062 if (ret) {
1063 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1064 /* Ignore the error from the low
1065 level driver. We don't care why it
1066 couldn't close the tray. We only care
1067 that there is no disc in the drive,
1068 since that is the _REAL_ problem here.*/
1069 ret=-ENOMEDIUM;
1070 goto clean_up_and_return;
1071 }
1072 } else {
1073 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 /* Ok, the door should be closed now.. Check again */
1078 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1079 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1080 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1081 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1082 ret=-ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 cd_dbg(CD_OPEN, "the tray is now closed\n");
1086 }
1087 /* the door should be closed now, check for the disc */
1088 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1089 if (ret!=CDS_DISC_OK) {
1090 ret = -ENOMEDIUM;
1091 goto clean_up_and_return;
1092 }
1093 }
1094 cdrom_count_tracks(cdi, &tracks);
1095 if (tracks.error == CDS_NO_DISC) {
1096 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1097 ret=-ENOMEDIUM;
1098 goto clean_up_and_return;
1099 }
1100 /* CD-Players which don't use O_NONBLOCK, workman
1101 * for example, need bit CDO_CHECK_TYPE cleared! */
1102 if (tracks.data==0) {
1103 if (cdi->options & CDO_CHECK_TYPE) {
1104 /* give people a warning shot, now that CDO_CHECK_TYPE
1105 is the default case! */
1106 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1107 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1108 (unsigned int)task_pid_nr(current));
1109 ret=-EMEDIUMTYPE;
1110 goto clean_up_and_return;
1111 }
1112 else {
1113 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1114 }
1115 }
1116
1117 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1118
1119 /* all seems well, we can open the device */
1120 ret = cdo->open(cdi, 0); /* open for data */
1121 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1122 /* After all this careful checking, we shouldn't have problems
1123 opening the device, but we don't want the device locked if
1124 this somehow fails... */
1125 if (ret) {
1126 cd_dbg(CD_OPEN, "open device failed\n");
1127 goto clean_up_and_return;
1128 }
1129 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1130 cdo->lock_door(cdi, 1);
1131 cd_dbg(CD_OPEN, "door locked\n");
1132 }
1133 cd_dbg(CD_OPEN, "device opened successfully\n");
1134 return ret;
1135
1136 /* Something failed. Try to unlock the drive, because some drivers
1137 (notably ide-cd) lock the drive after every command. This produced
1138 a nasty bug where after mount failed, the drive would remain locked!
1139 This ensures that the drive gets unlocked after a mount fails. This
1140 is a goto to avoid bloating the driver with redundant code. */
1141clean_up_and_return:
1142 cd_dbg(CD_OPEN, "open failed\n");
1143 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1144 cdo->lock_door(cdi, 0);
1145 cd_dbg(CD_OPEN, "door unlocked\n");
1146 }
1147 return ret;
1148}
1149
1150/* We use the open-option O_NONBLOCK to indicate that the
1151 * purpose of opening is only for subsequent ioctl() calls; no device
1152 * integrity checks are performed.
1153 *
1154 * We hope that all cd-player programs will adopt this convention. It
1155 * is in their own interest: device control becomes a lot easier
1156 * this way.
1157 */
1158int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1159 fmode_t mode)
1160{
1161 int ret;
1162
1163 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1164
1165 /* if this was a O_NONBLOCK open and we should honor the flags,
1166 * do a quick open without drive/disc integrity checks. */
1167 cdi->use_count++;
1168 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1169 ret = cdi->ops->open(cdi, 1);
1170 } else {
1171 ret = open_for_data(cdi);
1172 if (ret)
1173 goto err;
1174 if (CDROM_CAN(CDC_GENERIC_PACKET))
1175 cdrom_mmc3_profile(cdi);
1176 if (mode & FMODE_WRITE) {
1177 ret = -EROFS;
1178 if (cdrom_open_write(cdi))
1179 goto err_release;
1180 if (!CDROM_CAN(CDC_RAM))
1181 goto err_release;
1182 ret = 0;
1183 cdi->media_written = 0;
1184 }
1185 }
1186
1187 if (ret)
1188 goto err;
1189
1190 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1191 cdi->name, cdi->use_count);
1192 return 0;
1193err_release:
1194 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1195 cdi->ops->lock_door(cdi, 0);
1196 cd_dbg(CD_OPEN, "door unlocked\n");
1197 }
1198 cdi->ops->release(cdi);
1199err:
1200 cdi->use_count--;
1201 return ret;
1202}
1203
1204/* This code is similar to that in open_for_data. The routine is called
1205 whenever an audio play operation is requested.
1206*/
1207static int check_for_audio_disc(struct cdrom_device_info *cdi,
1208 const struct cdrom_device_ops *cdo)
1209{
1210 int ret;
1211 tracktype tracks;
1212 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1213 if (!(cdi->options & CDO_CHECK_TYPE))
1214 return 0;
1215 if (cdo->drive_status != NULL) {
1216 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1217 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1218 if (ret == CDS_TRAY_OPEN) {
1219 cd_dbg(CD_OPEN, "the tray is open...\n");
1220 /* can/may i close it? */
1221 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1222 cdi->options & CDO_AUTO_CLOSE) {
1223 cd_dbg(CD_OPEN, "trying to close the tray\n");
1224 ret=cdo->tray_move(cdi,0);
1225 if (ret) {
1226 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1227 /* Ignore the error from the low
1228 level driver. We don't care why it
1229 couldn't close the tray. We only care
1230 that there is no disc in the drive,
1231 since that is the _REAL_ problem here.*/
1232 return -ENOMEDIUM;
1233 }
1234 } else {
1235 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1236 return -ENOMEDIUM;
1237 }
1238 /* Ok, the door should be closed now.. Check again */
1239 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1240 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1241 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1242 return -ENOMEDIUM;
1243 }
1244 if (ret!=CDS_DISC_OK) {
1245 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1246 return -EIO;
1247 }
1248 cd_dbg(CD_OPEN, "the tray is now closed\n");
1249 }
1250 }
1251 cdrom_count_tracks(cdi, &tracks);
1252 if (tracks.error)
1253 return(tracks.error);
1254
1255 if (tracks.audio==0)
1256 return -EMEDIUMTYPE;
1257
1258 return 0;
1259}
1260
1261void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1262{
1263 const struct cdrom_device_ops *cdo = cdi->ops;
1264 int opened_for_data;
1265
1266 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1267
1268 if (cdi->use_count > 0)
1269 cdi->use_count--;
1270
1271 if (cdi->use_count == 0) {
1272 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1273 cdi->name);
1274 cdrom_dvd_rw_close_write(cdi);
1275
1276 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1277 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1278 cdo->lock_door(cdi, 0);
1279 }
1280 }
1281
1282 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1283 !(mode & FMODE_NDELAY);
1284
1285 /*
1286 * flush cache on last write release
1287 */
1288 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1289 cdrom_close_write(cdi);
1290
1291 cdo->release(cdi);
1292 if (cdi->use_count == 0) { /* last process that closes dev*/
1293 if (opened_for_data &&
1294 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1295 cdo->tray_move(cdi, 1);
1296 }
1297}
1298
1299static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1300 struct cdrom_changer_info *buf)
1301{
1302 struct packet_command cgc;
1303 const struct cdrom_device_ops *cdo = cdi->ops;
1304 int length;
1305
1306 /*
1307 * Sanyo changer isn't spec compliant (doesn't use regular change
1308 * LOAD_UNLOAD command, and it doesn't implement the mech status
1309 * command below
1310 */
1311 if (cdi->sanyo_slot) {
1312 buf->hdr.nslots = 3;
1313 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1314 for (length = 0; length < 3; length++) {
1315 buf->slots[length].disc_present = 1;
1316 buf->slots[length].change = 0;
1317 }
1318 return 0;
1319 }
1320
1321 length = sizeof(struct cdrom_mechstat_header) +
1322 cdi->capacity * sizeof(struct cdrom_slot);
1323
1324 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1325 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1326 cgc.cmd[8] = (length >> 8) & 0xff;
1327 cgc.cmd[9] = length & 0xff;
1328 return cdo->generic_packet(cdi, &cgc);
1329}
1330
1331static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1332{
1333 struct cdrom_changer_info *info;
1334 int ret;
1335
1336 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1337 if (cdi->sanyo_slot)
1338 return CDS_NO_INFO;
1339
1340 info = kmalloc(sizeof(*info), GFP_KERNEL);
1341 if (!info)
1342 return -ENOMEM;
1343
1344 if ((ret = cdrom_read_mech_status(cdi, info)))
1345 goto out_free;
1346
1347 if (info->slots[slot].disc_present)
1348 ret = CDS_DISC_OK;
1349 else
1350 ret = CDS_NO_DISC;
1351
1352out_free:
1353 kfree(info);
1354 return ret;
1355}
1356
1357/* Return the number of slots for an ATAPI/SCSI cdrom,
1358 * return 1 if not a changer.
1359 */
1360int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1361{
1362 int status;
1363 int nslots = 1;
1364 struct cdrom_changer_info *info;
1365
1366 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1367 /* cdrom_read_mech_status requires a valid value for capacity: */
1368 cdi->capacity = 0;
1369
1370 info = kmalloc(sizeof(*info), GFP_KERNEL);
1371 if (!info)
1372 return -ENOMEM;
1373
1374 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1375 nslots = info->hdr.nslots;
1376
1377 kfree(info);
1378 return nslots;
1379}
1380
1381
1382/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1383static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1384{
1385 struct packet_command cgc;
1386
1387 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1388 if (cdi->sanyo_slot && slot < 0)
1389 return 0;
1390
1391 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1392 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1393 cgc.cmd[4] = 2 + (slot >= 0);
1394 cgc.cmd[8] = slot;
1395 cgc.timeout = 60 * HZ;
1396
1397 /* The Sanyo 3 CD changer uses byte 7 of the
1398 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1399 using the GPCMD_LOAD_UNLOAD opcode. */
1400 if (cdi->sanyo_slot && -1 < slot) {
1401 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1402 cgc.cmd[7] = slot;
1403 cgc.cmd[4] = cgc.cmd[8] = 0;
1404 cdi->sanyo_slot = slot ? slot : 3;
1405 }
1406
1407 return cdi->ops->generic_packet(cdi, &cgc);
1408}
1409
1410static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1411{
1412 struct cdrom_changer_info *info;
1413 int curslot;
1414 int ret;
1415
1416 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1417 if (!CDROM_CAN(CDC_SELECT_DISC))
1418 return -EDRIVE_CANT_DO_THIS;
1419
1420 if (cdi->ops->check_events)
1421 cdi->ops->check_events(cdi, 0, slot);
1422
1423 if (slot == CDSL_NONE) {
1424 /* set media changed bits, on both queues */
1425 cdi->mc_flags = 0x3;
1426 return cdrom_load_unload(cdi, -1);
1427 }
1428
1429 info = kmalloc(sizeof(*info), GFP_KERNEL);
1430 if (!info)
1431 return -ENOMEM;
1432
1433 if ((ret = cdrom_read_mech_status(cdi, info))) {
1434 kfree(info);
1435 return ret;
1436 }
1437
1438 curslot = info->hdr.curslot;
1439 kfree(info);
1440
1441 if (cdi->use_count > 1 || cdi->keeplocked) {
1442 if (slot == CDSL_CURRENT) {
1443 return curslot;
1444 } else {
1445 return -EBUSY;
1446 }
1447 }
1448
1449 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1450 which is useful if it had been previously unloaded.
1451 Whether it can or not, it returns the current slot.
1452 Similarly, if slot happens to be the current one, we still
1453 try and load it. */
1454 if (slot == CDSL_CURRENT)
1455 slot = curslot;
1456
1457 /* set media changed bits on both queues */
1458 cdi->mc_flags = 0x3;
1459 if ((ret = cdrom_load_unload(cdi, slot)))
1460 return ret;
1461
1462 return slot;
1463}
1464
1465/*
1466 * As cdrom implements an extra ioctl consumer for media changed
1467 * event, it needs to buffer ->check_events() output, such that event
1468 * is not lost for both the usual VFS and ioctl paths.
1469 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1470 * path.
1471 *
1472 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1473 * called in parallel and buffering fields are accessed without any
1474 * exclusion. The original media_changed code had the same problem.
1475 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1476 * and remove this cruft altogether. It doesn't have much usefulness
1477 * at this point.
1478 */
1479static void cdrom_update_events(struct cdrom_device_info *cdi,
1480 unsigned int clearing)
1481{
1482 unsigned int events;
1483
1484 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1485 cdi->vfs_events |= events;
1486 cdi->ioctl_events |= events;
1487}
1488
1489unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1490 unsigned int clearing)
1491{
1492 unsigned int events;
1493
1494 cdrom_update_events(cdi, clearing);
1495 events = cdi->vfs_events;
1496 cdi->vfs_events = 0;
1497 return events;
1498}
1499EXPORT_SYMBOL(cdrom_check_events);
1500
1501/* We want to make media_changed accessible to the user through an
1502 * ioctl. The main problem now is that we must double-buffer the
1503 * low-level implementation, to assure that the VFS and the user both
1504 * see a medium change once.
1505 */
1506
1507static
1508int media_changed(struct cdrom_device_info *cdi, int queue)
1509{
1510 unsigned int mask = (1 << (queue & 1));
1511 int ret = !!(cdi->mc_flags & mask);
1512 bool changed;
1513
1514 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1515 return ret;
1516
1517 /* changed since last call? */
1518 BUG_ON(!queue); /* shouldn't be called from VFS path */
1519 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1520 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1521 cdi->ioctl_events = 0;
1522
1523 if (changed) {
1524 cdi->mc_flags = 0x3; /* set bit on both queues */
1525 ret |= 1;
1526 cdi->media_written = 0;
1527 }
1528
1529 cdi->mc_flags &= ~mask; /* clear bit */
1530 return ret;
1531}
1532
1533/* Requests to the low-level drivers will /always/ be done in the
1534 following format convention:
1535
1536 CDROM_LBA: all data-related requests.
1537 CDROM_MSF: all audio-related requests.
1538
1539 However, a low-level implementation is allowed to refuse this
1540 request, and return information in its own favorite format.
1541
1542 It doesn't make sense /at all/ to ask for a play_audio in LBA
1543 format, or ask for multi-session info in MSF format. However, for
1544 backward compatibility these format requests will be satisfied, but
1545 the requests to the low-level drivers will be sanitized in the more
1546 meaningful format indicated above.
1547 */
1548
1549static
1550void sanitize_format(union cdrom_addr *addr,
1551 u_char * curr, u_char requested)
1552{
1553 if (*curr == requested)
1554 return; /* nothing to be done! */
1555 if (requested == CDROM_LBA) {
1556 addr->lba = (int) addr->msf.frame +
1557 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1558 } else { /* CDROM_MSF */
1559 int lba = addr->lba;
1560 addr->msf.frame = lba % 75;
1561 lba /= 75;
1562 lba += 2;
1563 addr->msf.second = lba % 60;
1564 addr->msf.minute = lba / 60;
1565 }
1566 *curr = requested;
1567}
1568
1569void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1570 int type)
1571{
1572 memset(cgc, 0, sizeof(struct packet_command));
1573 if (buf)
1574 memset(buf, 0, len);
1575 cgc->buffer = (char *) buf;
1576 cgc->buflen = len;
1577 cgc->data_direction = type;
1578 cgc->timeout = CDROM_DEF_TIMEOUT;
1579}
1580
1581/* DVD handling */
1582
1583#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1584#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1585
1586static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1587{
1588 cgc->cmd[0] = GPCMD_REPORT_KEY;
1589 cgc->cmd[10] = type | (agid << 6);
1590 switch (type) {
1591 case 0: case 8: case 5: {
1592 cgc->buflen = 8;
1593 break;
1594 }
1595 case 1: {
1596 cgc->buflen = 16;
1597 break;
1598 }
1599 case 2: case 4: {
1600 cgc->buflen = 12;
1601 break;
1602 }
1603 }
1604 cgc->cmd[9] = cgc->buflen;
1605 cgc->data_direction = CGC_DATA_READ;
1606}
1607
1608static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1609{
1610 cgc->cmd[0] = GPCMD_SEND_KEY;
1611 cgc->cmd[10] = type | (agid << 6);
1612 switch (type) {
1613 case 1: {
1614 cgc->buflen = 16;
1615 break;
1616 }
1617 case 3: {
1618 cgc->buflen = 12;
1619 break;
1620 }
1621 case 6: {
1622 cgc->buflen = 8;
1623 break;
1624 }
1625 }
1626 cgc->cmd[9] = cgc->buflen;
1627 cgc->data_direction = CGC_DATA_WRITE;
1628}
1629
1630static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1631{
1632 int ret;
1633 u_char buf[20];
1634 struct packet_command cgc;
1635 const struct cdrom_device_ops *cdo = cdi->ops;
1636 rpc_state_t rpc_state;
1637
1638 memset(buf, 0, sizeof(buf));
1639 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1640
1641 switch (ai->type) {
1642 /* LU data send */
1643 case DVD_LU_SEND_AGID:
1644 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1645 cgc.quiet = 1;
1646 setup_report_key(&cgc, ai->lsa.agid, 0);
1647
1648 if ((ret = cdo->generic_packet(cdi, &cgc)))
1649 return ret;
1650
1651 ai->lsa.agid = buf[7] >> 6;
1652 /* Returning data, let host change state */
1653 break;
1654
1655 case DVD_LU_SEND_KEY1:
1656 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1657 setup_report_key(&cgc, ai->lsk.agid, 2);
1658
1659 if ((ret = cdo->generic_packet(cdi, &cgc)))
1660 return ret;
1661
1662 copy_key(ai->lsk.key, &buf[4]);
1663 /* Returning data, let host change state */
1664 break;
1665
1666 case DVD_LU_SEND_CHALLENGE:
1667 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1668 setup_report_key(&cgc, ai->lsc.agid, 1);
1669
1670 if ((ret = cdo->generic_packet(cdi, &cgc)))
1671 return ret;
1672
1673 copy_chal(ai->lsc.chal, &buf[4]);
1674 /* Returning data, let host change state */
1675 break;
1676
1677 /* Post-auth key */
1678 case DVD_LU_SEND_TITLE_KEY:
1679 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1680 cgc.quiet = 1;
1681 setup_report_key(&cgc, ai->lstk.agid, 4);
1682 cgc.cmd[5] = ai->lstk.lba;
1683 cgc.cmd[4] = ai->lstk.lba >> 8;
1684 cgc.cmd[3] = ai->lstk.lba >> 16;
1685 cgc.cmd[2] = ai->lstk.lba >> 24;
1686
1687 if ((ret = cdo->generic_packet(cdi, &cgc)))
1688 return ret;
1689
1690 ai->lstk.cpm = (buf[4] >> 7) & 1;
1691 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1692 ai->lstk.cgms = (buf[4] >> 4) & 3;
1693 copy_key(ai->lstk.title_key, &buf[5]);
1694 /* Returning data, let host change state */
1695 break;
1696
1697 case DVD_LU_SEND_ASF:
1698 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1699 setup_report_key(&cgc, ai->lsasf.agid, 5);
1700
1701 if ((ret = cdo->generic_packet(cdi, &cgc)))
1702 return ret;
1703
1704 ai->lsasf.asf = buf[7] & 1;
1705 break;
1706
1707 /* LU data receive (LU changes state) */
1708 case DVD_HOST_SEND_CHALLENGE:
1709 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1710 setup_send_key(&cgc, ai->hsc.agid, 1);
1711 buf[1] = 0xe;
1712 copy_chal(&buf[4], ai->hsc.chal);
1713
1714 if ((ret = cdo->generic_packet(cdi, &cgc)))
1715 return ret;
1716
1717 ai->type = DVD_LU_SEND_KEY1;
1718 break;
1719
1720 case DVD_HOST_SEND_KEY2:
1721 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1722 setup_send_key(&cgc, ai->hsk.agid, 3);
1723 buf[1] = 0xa;
1724 copy_key(&buf[4], ai->hsk.key);
1725
1726 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1727 ai->type = DVD_AUTH_FAILURE;
1728 return ret;
1729 }
1730 ai->type = DVD_AUTH_ESTABLISHED;
1731 break;
1732
1733 /* Misc */
1734 case DVD_INVALIDATE_AGID:
1735 cgc.quiet = 1;
1736 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1737 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1738 if ((ret = cdo->generic_packet(cdi, &cgc)))
1739 return ret;
1740 break;
1741
1742 /* Get region settings */
1743 case DVD_LU_SEND_RPC_STATE:
1744 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1745 setup_report_key(&cgc, 0, 8);
1746 memset(&rpc_state, 0, sizeof(rpc_state_t));
1747 cgc.buffer = (char *) &rpc_state;
1748
1749 if ((ret = cdo->generic_packet(cdi, &cgc)))
1750 return ret;
1751
1752 ai->lrpcs.type = rpc_state.type_code;
1753 ai->lrpcs.vra = rpc_state.vra;
1754 ai->lrpcs.ucca = rpc_state.ucca;
1755 ai->lrpcs.region_mask = rpc_state.region_mask;
1756 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1757 break;
1758
1759 /* Set region settings */
1760 case DVD_HOST_SEND_RPC_STATE:
1761 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1762 setup_send_key(&cgc, 0, 6);
1763 buf[1] = 6;
1764 buf[4] = ai->hrpcs.pdrc;
1765
1766 if ((ret = cdo->generic_packet(cdi, &cgc)))
1767 return ret;
1768 break;
1769
1770 default:
1771 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1772 return -ENOTTY;
1773 }
1774
1775 return 0;
1776}
1777
1778static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1779 struct packet_command *cgc)
1780{
1781 unsigned char buf[21], *base;
1782 struct dvd_layer *layer;
1783 const struct cdrom_device_ops *cdo = cdi->ops;
1784 int ret, layer_num = s->physical.layer_num;
1785
1786 if (layer_num >= DVD_LAYERS)
1787 return -EINVAL;
1788
1789 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1790 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1791 cgc->cmd[6] = layer_num;
1792 cgc->cmd[7] = s->type;
1793 cgc->cmd[9] = cgc->buflen & 0xff;
1794
1795 /*
1796 * refrain from reporting errors on non-existing layers (mainly)
1797 */
1798 cgc->quiet = 1;
1799
1800 ret = cdo->generic_packet(cdi, cgc);
1801 if (ret)
1802 return ret;
1803
1804 base = &buf[4];
1805 layer = &s->physical.layer[layer_num];
1806
1807 /*
1808 * place the data... really ugly, but at least we won't have to
1809 * worry about endianess in userspace.
1810 */
1811 memset(layer, 0, sizeof(*layer));
1812 layer->book_version = base[0] & 0xf;
1813 layer->book_type = base[0] >> 4;
1814 layer->min_rate = base[1] & 0xf;
1815 layer->disc_size = base[1] >> 4;
1816 layer->layer_type = base[2] & 0xf;
1817 layer->track_path = (base[2] >> 4) & 1;
1818 layer->nlayers = (base[2] >> 5) & 3;
1819 layer->track_density = base[3] & 0xf;
1820 layer->linear_density = base[3] >> 4;
1821 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1822 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1823 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1824 layer->bca = base[16] >> 7;
1825
1826 return 0;
1827}
1828
1829static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1830 struct packet_command *cgc)
1831{
1832 int ret;
1833 u_char buf[8];
1834 const struct cdrom_device_ops *cdo = cdi->ops;
1835
1836 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1837 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1838 cgc->cmd[6] = s->copyright.layer_num;
1839 cgc->cmd[7] = s->type;
1840 cgc->cmd[8] = cgc->buflen >> 8;
1841 cgc->cmd[9] = cgc->buflen & 0xff;
1842
1843 ret = cdo->generic_packet(cdi, cgc);
1844 if (ret)
1845 return ret;
1846
1847 s->copyright.cpst = buf[4];
1848 s->copyright.rmi = buf[5];
1849
1850 return 0;
1851}
1852
1853static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1854 struct packet_command *cgc)
1855{
1856 int ret, size;
1857 u_char *buf;
1858 const struct cdrom_device_ops *cdo = cdi->ops;
1859
1860 size = sizeof(s->disckey.value) + 4;
1861
1862 buf = kmalloc(size, GFP_KERNEL);
1863 if (!buf)
1864 return -ENOMEM;
1865
1866 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1867 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1868 cgc->cmd[7] = s->type;
1869 cgc->cmd[8] = size >> 8;
1870 cgc->cmd[9] = size & 0xff;
1871 cgc->cmd[10] = s->disckey.agid << 6;
1872
1873 ret = cdo->generic_packet(cdi, cgc);
1874 if (!ret)
1875 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1876
1877 kfree(buf);
1878 return ret;
1879}
1880
1881static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1882 struct packet_command *cgc)
1883{
1884 int ret, size = 4 + 188;
1885 u_char *buf;
1886 const struct cdrom_device_ops *cdo = cdi->ops;
1887
1888 buf = kmalloc(size, GFP_KERNEL);
1889 if (!buf)
1890 return -ENOMEM;
1891
1892 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1893 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1894 cgc->cmd[7] = s->type;
1895 cgc->cmd[9] = cgc->buflen & 0xff;
1896
1897 ret = cdo->generic_packet(cdi, cgc);
1898 if (ret)
1899 goto out;
1900
1901 s->bca.len = buf[0] << 8 | buf[1];
1902 if (s->bca.len < 12 || s->bca.len > 188) {
1903 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1904 s->bca.len);
1905 ret = -EIO;
1906 goto out;
1907 }
1908 memcpy(s->bca.value, &buf[4], s->bca.len);
1909 ret = 0;
1910out:
1911 kfree(buf);
1912 return ret;
1913}
1914
1915static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1916 struct packet_command *cgc)
1917{
1918 int ret = 0, size;
1919 u_char *buf;
1920 const struct cdrom_device_ops *cdo = cdi->ops;
1921
1922 size = sizeof(s->manufact.value) + 4;
1923
1924 buf = kmalloc(size, GFP_KERNEL);
1925 if (!buf)
1926 return -ENOMEM;
1927
1928 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1929 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1930 cgc->cmd[7] = s->type;
1931 cgc->cmd[8] = size >> 8;
1932 cgc->cmd[9] = size & 0xff;
1933
1934 ret = cdo->generic_packet(cdi, cgc);
1935 if (ret)
1936 goto out;
1937
1938 s->manufact.len = buf[0] << 8 | buf[1];
1939 if (s->manufact.len < 0) {
1940 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1941 s->manufact.len);
1942 ret = -EIO;
1943 } else {
1944 if (s->manufact.len > 2048) {
1945 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1946 s->manufact.len);
1947 s->manufact.len = 2048;
1948 }
1949 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1950 }
1951
1952out:
1953 kfree(buf);
1954 return ret;
1955}
1956
1957static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1958 struct packet_command *cgc)
1959{
1960 switch (s->type) {
1961 case DVD_STRUCT_PHYSICAL:
1962 return dvd_read_physical(cdi, s, cgc);
1963
1964 case DVD_STRUCT_COPYRIGHT:
1965 return dvd_read_copyright(cdi, s, cgc);
1966
1967 case DVD_STRUCT_DISCKEY:
1968 return dvd_read_disckey(cdi, s, cgc);
1969
1970 case DVD_STRUCT_BCA:
1971 return dvd_read_bca(cdi, s, cgc);
1972
1973 case DVD_STRUCT_MANUFACT:
1974 return dvd_read_manufact(cdi, s, cgc);
1975
1976 default:
1977 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1978 s->type);
1979 return -EINVAL;
1980 }
1981}
1982
1983int cdrom_mode_sense(struct cdrom_device_info *cdi,
1984 struct packet_command *cgc,
1985 int page_code, int page_control)
1986{
1987 const struct cdrom_device_ops *cdo = cdi->ops;
1988
1989 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1990
1991 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1992 cgc->cmd[2] = page_code | (page_control << 6);
1993 cgc->cmd[7] = cgc->buflen >> 8;
1994 cgc->cmd[8] = cgc->buflen & 0xff;
1995 cgc->data_direction = CGC_DATA_READ;
1996 return cdo->generic_packet(cdi, cgc);
1997}
1998
1999int cdrom_mode_select(struct cdrom_device_info *cdi,
2000 struct packet_command *cgc)
2001{
2002 const struct cdrom_device_ops *cdo = cdi->ops;
2003
2004 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2005 memset(cgc->buffer, 0, 2);
2006 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2007 cgc->cmd[1] = 0x10; /* PF */
2008 cgc->cmd[7] = cgc->buflen >> 8;
2009 cgc->cmd[8] = cgc->buflen & 0xff;
2010 cgc->data_direction = CGC_DATA_WRITE;
2011 return cdo->generic_packet(cdi, cgc);
2012}
2013
2014static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2015 struct cdrom_subchnl *subchnl, int mcn)
2016{
2017 const struct cdrom_device_ops *cdo = cdi->ops;
2018 struct packet_command cgc;
2019 char buffer[32];
2020 int ret;
2021
2022 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2023 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2024 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2025 cgc.cmd[2] = 0x40; /* request subQ data */
2026 cgc.cmd[3] = mcn ? 2 : 1;
2027 cgc.cmd[8] = 16;
2028
2029 if ((ret = cdo->generic_packet(cdi, &cgc)))
2030 return ret;
2031
2032 subchnl->cdsc_audiostatus = cgc.buffer[1];
2033 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2034 subchnl->cdsc_trk = cgc.buffer[6];
2035 subchnl->cdsc_ind = cgc.buffer[7];
2036
2037 if (subchnl->cdsc_format == CDROM_LBA) {
2038 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2039 (cgc.buffer[9] << 16) |
2040 (cgc.buffer[10] << 8) |
2041 (cgc.buffer[11]));
2042 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2043 (cgc.buffer[13] << 16) |
2044 (cgc.buffer[14] << 8) |
2045 (cgc.buffer[15]));
2046 } else {
2047 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2048 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2049 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2050 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2051 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2052 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2053 }
2054
2055 return 0;
2056}
2057
2058/*
2059 * Specific READ_10 interface
2060 */
2061static int cdrom_read_cd(struct cdrom_device_info *cdi,
2062 struct packet_command *cgc, int lba,
2063 int blocksize, int nblocks)
2064{
2065 const struct cdrom_device_ops *cdo = cdi->ops;
2066
2067 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2068 cgc->cmd[0] = GPCMD_READ_10;
2069 cgc->cmd[2] = (lba >> 24) & 0xff;
2070 cgc->cmd[3] = (lba >> 16) & 0xff;
2071 cgc->cmd[4] = (lba >> 8) & 0xff;
2072 cgc->cmd[5] = lba & 0xff;
2073 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2074 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2075 cgc->cmd[8] = nblocks & 0xff;
2076 cgc->buflen = blocksize * nblocks;
2077 return cdo->generic_packet(cdi, cgc);
2078}
2079
2080/* very generic interface for reading the various types of blocks */
2081static int cdrom_read_block(struct cdrom_device_info *cdi,
2082 struct packet_command *cgc,
2083 int lba, int nblocks, int format, int blksize)
2084{
2085 const struct cdrom_device_ops *cdo = cdi->ops;
2086
2087 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2088 cgc->cmd[0] = GPCMD_READ_CD;
2089 /* expected sector size - cdda,mode1,etc. */
2090 cgc->cmd[1] = format << 2;
2091 /* starting address */
2092 cgc->cmd[2] = (lba >> 24) & 0xff;
2093 cgc->cmd[3] = (lba >> 16) & 0xff;
2094 cgc->cmd[4] = (lba >> 8) & 0xff;
2095 cgc->cmd[5] = lba & 0xff;
2096 /* number of blocks */
2097 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2098 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2099 cgc->cmd[8] = nblocks & 0xff;
2100 cgc->buflen = blksize * nblocks;
2101
2102 /* set the header info returned */
2103 switch (blksize) {
2104 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2105 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2106 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2107 default : cgc->cmd[9] = 0x10;
2108 }
2109
2110 return cdo->generic_packet(cdi, cgc);
2111}
2112
2113static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2114 int lba, int nframes)
2115{
2116 struct packet_command cgc;
2117 int ret = 0;
2118 int nr;
2119
2120 cdi->last_sense = 0;
2121
2122 memset(&cgc, 0, sizeof(cgc));
2123
2124 /*
2125 * start with will ra.nframes size, back down if alloc fails
2126 */
2127 nr = nframes;
2128 do {
2129 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL);
2130 if (cgc.buffer)
2131 break;
2132
2133 nr >>= 1;
2134 } while (nr);
2135
2136 if (!nr)
2137 return -ENOMEM;
2138
2139 cgc.data_direction = CGC_DATA_READ;
2140 while (nframes > 0) {
2141 if (nr > nframes)
2142 nr = nframes;
2143
2144 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2145 if (ret)
2146 break;
2147 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2148 ret = -EFAULT;
2149 break;
2150 }
2151 ubuf += CD_FRAMESIZE_RAW * nr;
2152 nframes -= nr;
2153 lba += nr;
2154 }
2155 kfree(cgc.buffer);
2156 return ret;
2157}
2158
2159static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2160 int lba, int nframes)
2161{
2162 struct request_queue *q = cdi->disk->queue;
2163 struct request *rq;
2164 struct scsi_request *req;
2165 struct bio *bio;
2166 unsigned int len;
2167 int nr, ret = 0;
2168
2169 if (!q)
2170 return -ENXIO;
2171
2172 if (!blk_queue_scsi_passthrough(q)) {
2173 WARN_ONCE(true,
2174 "Attempt read CDDA info through a non-SCSI queue\n");
2175 return -EINVAL;
2176 }
2177
2178 cdi->last_sense = 0;
2179
2180 while (nframes) {
2181 nr = nframes;
2182 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2183 nr = 1;
2184 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2185 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2186
2187 len = nr * CD_FRAMESIZE_RAW;
2188
2189 rq = blk_get_request(q, REQ_OP_SCSI_IN, 0);
2190 if (IS_ERR(rq)) {
2191 ret = PTR_ERR(rq);
2192 break;
2193 }
2194 req = scsi_req(rq);
2195
2196 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2197 if (ret) {
2198 blk_put_request(rq);
2199 break;
2200 }
2201
2202 req->cmd[0] = GPCMD_READ_CD;
2203 req->cmd[1] = 1 << 2;
2204 req->cmd[2] = (lba >> 24) & 0xff;
2205 req->cmd[3] = (lba >> 16) & 0xff;
2206 req->cmd[4] = (lba >> 8) & 0xff;
2207 req->cmd[5] = lba & 0xff;
2208 req->cmd[6] = (nr >> 16) & 0xff;
2209 req->cmd[7] = (nr >> 8) & 0xff;
2210 req->cmd[8] = nr & 0xff;
2211 req->cmd[9] = 0xf8;
2212
2213 req->cmd_len = 12;
2214 rq->timeout = 60 * HZ;
2215 bio = rq->bio;
2216
2217 blk_execute_rq(q, cdi->disk, rq, 0);
2218 if (scsi_req(rq)->result) {
2219 struct scsi_sense_hdr sshdr;
2220
2221 ret = -EIO;
2222 scsi_normalize_sense(req->sense, req->sense_len,
2223 &sshdr);
2224 cdi->last_sense = sshdr.sense_key;
2225 }
2226
2227 if (blk_rq_unmap_user(bio))
2228 ret = -EFAULT;
2229 blk_put_request(rq);
2230
2231 if (ret)
2232 break;
2233
2234 nframes -= nr;
2235 lba += nr;
2236 ubuf += len;
2237 }
2238
2239 return ret;
2240}
2241
2242static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2243 int lba, int nframes)
2244{
2245 int ret;
2246
2247 if (cdi->cdda_method == CDDA_OLD)
2248 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2249
2250retry:
2251 /*
2252 * for anything else than success and io error, we need to retry
2253 */
2254 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2255 if (!ret || ret != -EIO)
2256 return ret;
2257
2258 /*
2259 * I've seen drives get sense 4/8/3 udma crc errors on multi
2260 * frame dma, so drop to single frame dma if we need to
2261 */
2262 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2263 pr_info("dropping to single frame dma\n");
2264 cdi->cdda_method = CDDA_BPC_SINGLE;
2265 goto retry;
2266 }
2267
2268 /*
2269 * so we have an io error of some sort with multi frame dma. if the
2270 * condition wasn't a hardware error
2271 * problems, not for any error
2272 */
2273 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2274 return ret;
2275
2276 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2277 cdi->cdda_method = CDDA_OLD;
2278 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2279}
2280
2281int cdrom_multisession(struct cdrom_device_info *cdi,
2282 struct cdrom_multisession *info)
2283{
2284 u8 requested_format;
2285 int ret;
2286
2287 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2288 return -ENOSYS;
2289
2290 requested_format = info->addr_format;
2291 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2292 return -EINVAL;
2293 info->addr_format = CDROM_LBA;
2294
2295 ret = cdi->ops->get_last_session(cdi, info);
2296 if (!ret)
2297 sanitize_format(&info->addr, &info->addr_format,
2298 requested_format);
2299 return ret;
2300}
2301EXPORT_SYMBOL_GPL(cdrom_multisession);
2302
2303static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2304 void __user *argp)
2305{
2306 struct cdrom_multisession info;
2307 int ret;
2308
2309 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2310
2311 if (copy_from_user(&info, argp, sizeof(info)))
2312 return -EFAULT;
2313 ret = cdrom_multisession(cdi, &info);
2314 if (ret)
2315 return ret;
2316 if (copy_to_user(argp, &info, sizeof(info)))
2317 return -EFAULT;
2318
2319 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2320 return ret;
2321}
2322
2323static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2324{
2325 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2326
2327 if (!CDROM_CAN(CDC_OPEN_TRAY))
2328 return -ENOSYS;
2329 if (cdi->use_count != 1 || cdi->keeplocked)
2330 return -EBUSY;
2331 if (CDROM_CAN(CDC_LOCK)) {
2332 int ret = cdi->ops->lock_door(cdi, 0);
2333 if (ret)
2334 return ret;
2335 }
2336
2337 return cdi->ops->tray_move(cdi, 1);
2338}
2339
2340static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2341{
2342 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2343
2344 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2345 return -ENOSYS;
2346 return cdi->ops->tray_move(cdi, 0);
2347}
2348
2349static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2350 unsigned long arg)
2351{
2352 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2353
2354 if (!CDROM_CAN(CDC_OPEN_TRAY))
2355 return -ENOSYS;
2356 if (cdi->keeplocked)
2357 return -EBUSY;
2358
2359 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2360 if (arg)
2361 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2362 return 0;
2363}
2364
2365static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2366 unsigned long arg)
2367{
2368 struct cdrom_changer_info *info;
2369 int ret;
2370
2371 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2372
2373 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2374 return -ENOSYS;
2375
2376 /* cannot select disc or select current disc */
2377 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2378 return media_changed(cdi, 1);
2379
2380 if (arg >= cdi->capacity)
2381 return -EINVAL;
2382
2383 info = kmalloc(sizeof(*info), GFP_KERNEL);
2384 if (!info)
2385 return -ENOMEM;
2386
2387 ret = cdrom_read_mech_status(cdi, info);
2388 if (!ret)
2389 ret = info->slots[arg].change;
2390 kfree(info);
2391 return ret;
2392}
2393
2394static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2395 unsigned long arg)
2396{
2397 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2398
2399 /*
2400 * Options need to be in sync with capability.
2401 * Too late for that, so we have to check each one separately.
2402 */
2403 switch (arg) {
2404 case CDO_USE_FFLAGS:
2405 case CDO_CHECK_TYPE:
2406 break;
2407 case CDO_LOCK:
2408 if (!CDROM_CAN(CDC_LOCK))
2409 return -ENOSYS;
2410 break;
2411 case 0:
2412 return cdi->options;
2413 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2414 default:
2415 if (!CDROM_CAN(arg))
2416 return -ENOSYS;
2417 }
2418 cdi->options |= (int) arg;
2419 return cdi->options;
2420}
2421
2422static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2423 unsigned long arg)
2424{
2425 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2426
2427 cdi->options &= ~(int) arg;
2428 return cdi->options;
2429}
2430
2431static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2432 unsigned long arg)
2433{
2434 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2435
2436 if (!CDROM_CAN(CDC_SELECT_SPEED))
2437 return -ENOSYS;
2438 return cdi->ops->select_speed(cdi, arg);
2439}
2440
2441static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2442 unsigned long arg)
2443{
2444 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2445
2446 if (!CDROM_CAN(CDC_SELECT_DISC))
2447 return -ENOSYS;
2448
2449 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2450 if (arg >= cdi->capacity)
2451 return -EINVAL;
2452 }
2453
2454 /*
2455 * ->select_disc is a hook to allow a driver-specific way of
2456 * seleting disc. However, since there is no equivalent hook for
2457 * cdrom_slot_status this may not actually be useful...
2458 */
2459 if (cdi->ops->select_disc)
2460 return cdi->ops->select_disc(cdi, arg);
2461
2462 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2463 return cdrom_select_disc(cdi, arg);
2464}
2465
2466static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2467 struct block_device *bdev)
2468{
2469 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2470
2471 if (!capable(CAP_SYS_ADMIN))
2472 return -EACCES;
2473 if (!CDROM_CAN(CDC_RESET))
2474 return -ENOSYS;
2475 invalidate_bdev(bdev);
2476 return cdi->ops->reset(cdi);
2477}
2478
2479static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2480 unsigned long arg)
2481{
2482 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2483
2484 if (!CDROM_CAN(CDC_LOCK))
2485 return -EDRIVE_CANT_DO_THIS;
2486
2487 cdi->keeplocked = arg ? 1 : 0;
2488
2489 /*
2490 * Don't unlock the door on multiple opens by default, but allow
2491 * root to do so.
2492 */
2493 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2494 return -EBUSY;
2495 return cdi->ops->lock_door(cdi, arg);
2496}
2497
2498static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2499 unsigned long arg)
2500{
2501 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2502
2503 if (!capable(CAP_SYS_ADMIN))
2504 return -EACCES;
2505 debug = arg ? 1 : 0;
2506 return debug;
2507}
2508
2509static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2510{
2511 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2512 return (cdi->ops->capability & ~cdi->mask);
2513}
2514
2515/*
2516 * The following function is implemented, although very few audio
2517 * discs give Universal Product Code information, which should just be
2518 * the Medium Catalog Number on the box. Note, that the way the code
2519 * is written on the CD is /not/ uniform across all discs!
2520 */
2521static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2522 void __user *argp)
2523{
2524 struct cdrom_mcn mcn;
2525 int ret;
2526
2527 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2528
2529 if (!(cdi->ops->capability & CDC_MCN))
2530 return -ENOSYS;
2531 ret = cdi->ops->get_mcn(cdi, &mcn);
2532 if (ret)
2533 return ret;
2534
2535 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2536 return -EFAULT;
2537 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2538 return 0;
2539}
2540
2541static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2542 unsigned long arg)
2543{
2544 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2545
2546 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2547 return -ENOSYS;
2548 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2549 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2550 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2551 if (arg >= cdi->capacity)
2552 return -EINVAL;
2553 return cdrom_slot_status(cdi, arg);
2554}
2555
2556/*
2557 * Ok, this is where problems start. The current interface for the
2558 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2559 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2560 * is often the case, it is also very common for CDs to have some tracks
2561 * with data, and some tracks with audio. Just because I feel like it,
2562 * I declare the following to be the best way to cope. If the CD has ANY
2563 * data tracks on it, it will be returned as a data CD. If it has any XA
2564 * tracks, I will return it as that. Now I could simplify this interface
2565 * by combining these returns with the above, but this more clearly
2566 * demonstrates the problem with the current interface. Too bad this
2567 * wasn't designed to use bitmasks... -Erik
2568 *
2569 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2570 * User level programmers might feel the ioctl is not very useful.
2571 * ---david
2572 */
2573static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2574{
2575 tracktype tracks;
2576
2577 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2578
2579 cdrom_count_tracks(cdi, &tracks);
2580 if (tracks.error)
2581 return tracks.error;
2582
2583 /* Policy mode on */
2584 if (tracks.audio > 0) {
2585 if (!tracks.data && !tracks.cdi && !tracks.xa)
2586 return CDS_AUDIO;
2587 else
2588 return CDS_MIXED;
2589 }
2590
2591 if (tracks.cdi > 0)
2592 return CDS_XA_2_2;
2593 if (tracks.xa > 0)
2594 return CDS_XA_2_1;
2595 if (tracks.data > 0)
2596 return CDS_DATA_1;
2597 /* Policy mode off */
2598
2599 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2600 return CDS_NO_INFO;
2601}
2602
2603static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2604{
2605 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2606 return cdi->capacity;
2607}
2608
2609static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2610 void __user *argp)
2611{
2612 struct cdrom_subchnl q;
2613 u8 requested, back;
2614 int ret;
2615
2616 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2617
2618 if (copy_from_user(&q, argp, sizeof(q)))
2619 return -EFAULT;
2620
2621 requested = q.cdsc_format;
2622 if (requested != CDROM_MSF && requested != CDROM_LBA)
2623 return -EINVAL;
2624 q.cdsc_format = CDROM_MSF;
2625
2626 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2627 if (ret)
2628 return ret;
2629
2630 back = q.cdsc_format; /* local copy */
2631 sanitize_format(&q.cdsc_absaddr, &back, requested);
2632 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2633
2634 if (copy_to_user(argp, &q, sizeof(q)))
2635 return -EFAULT;
2636 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2637 return 0;
2638}
2639
2640static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2641 void __user *argp)
2642{
2643 struct cdrom_tochdr header;
2644 int ret;
2645
2646 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2647
2648 if (copy_from_user(&header, argp, sizeof(header)))
2649 return -EFAULT;
2650
2651 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2652 if (ret)
2653 return ret;
2654
2655 if (copy_to_user(argp, &header, sizeof(header)))
2656 return -EFAULT;
2657 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2658 return 0;
2659}
2660
2661int cdrom_read_tocentry(struct cdrom_device_info *cdi,
2662 struct cdrom_tocentry *entry)
2663{
2664 u8 requested_format = entry->cdte_format;
2665 int ret;
2666
2667 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2668 return -EINVAL;
2669
2670 /* make interface to low-level uniform */
2671 entry->cdte_format = CDROM_MSF;
2672 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, entry);
2673 if (!ret)
2674 sanitize_format(&entry->cdte_addr, &entry->cdte_format,
2675 requested_format);
2676 return ret;
2677}
2678EXPORT_SYMBOL_GPL(cdrom_read_tocentry);
2679
2680static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2681 void __user *argp)
2682{
2683 struct cdrom_tocentry entry;
2684 int ret;
2685
2686 if (copy_from_user(&entry, argp, sizeof(entry)))
2687 return -EFAULT;
2688 ret = cdrom_read_tocentry(cdi, &entry);
2689 if (!ret && copy_to_user(argp, &entry, sizeof(entry)))
2690 return -EFAULT;
2691 return ret;
2692}
2693
2694static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2695 void __user *argp)
2696{
2697 struct cdrom_msf msf;
2698
2699 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2700
2701 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2702 return -ENOSYS;
2703 if (copy_from_user(&msf, argp, sizeof(msf)))
2704 return -EFAULT;
2705 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2706}
2707
2708static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2709 void __user *argp)
2710{
2711 struct cdrom_ti ti;
2712 int ret;
2713
2714 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2715
2716 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2717 return -ENOSYS;
2718 if (copy_from_user(&ti, argp, sizeof(ti)))
2719 return -EFAULT;
2720
2721 ret = check_for_audio_disc(cdi, cdi->ops);
2722 if (ret)
2723 return ret;
2724 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2725}
2726static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2727 void __user *argp)
2728{
2729 struct cdrom_volctrl volume;
2730
2731 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2732
2733 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2734 return -ENOSYS;
2735 if (copy_from_user(&volume, argp, sizeof(volume)))
2736 return -EFAULT;
2737 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2738}
2739
2740static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2741 void __user *argp)
2742{
2743 struct cdrom_volctrl volume;
2744 int ret;
2745
2746 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2747
2748 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2749 return -ENOSYS;
2750
2751 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2752 if (ret)
2753 return ret;
2754
2755 if (copy_to_user(argp, &volume, sizeof(volume)))
2756 return -EFAULT;
2757 return 0;
2758}
2759
2760static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2761 unsigned int cmd)
2762{
2763 int ret;
2764
2765 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2766
2767 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2768 return -ENOSYS;
2769 ret = check_for_audio_disc(cdi, cdi->ops);
2770 if (ret)
2771 return ret;
2772 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2773}
2774
2775/*
2776 * Required when we need to use READ_10 to issue other than 2048 block
2777 * reads
2778 */
2779static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2780{
2781 const struct cdrom_device_ops *cdo = cdi->ops;
2782 struct packet_command cgc;
2783 struct modesel_head mh;
2784
2785 memset(&mh, 0, sizeof(mh));
2786 mh.block_desc_length = 0x08;
2787 mh.block_length_med = (size >> 8) & 0xff;
2788 mh.block_length_lo = size & 0xff;
2789
2790 memset(&cgc, 0, sizeof(cgc));
2791 cgc.cmd[0] = 0x15;
2792 cgc.cmd[1] = 1 << 4;
2793 cgc.cmd[4] = 12;
2794 cgc.buflen = sizeof(mh);
2795 cgc.buffer = (char *) &mh;
2796 cgc.data_direction = CGC_DATA_WRITE;
2797 mh.block_desc_length = 0x08;
2798 mh.block_length_med = (size >> 8) & 0xff;
2799 mh.block_length_lo = size & 0xff;
2800
2801 return cdo->generic_packet(cdi, &cgc);
2802}
2803
2804static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2805 __u16 track, __u8 type, track_information *ti)
2806{
2807 const struct cdrom_device_ops *cdo = cdi->ops;
2808 struct packet_command cgc;
2809 int ret, buflen;
2810
2811 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2812 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2813 cgc.cmd[1] = type & 3;
2814 cgc.cmd[4] = (track & 0xff00) >> 8;
2815 cgc.cmd[5] = track & 0xff;
2816 cgc.cmd[8] = 8;
2817 cgc.quiet = 1;
2818
2819 ret = cdo->generic_packet(cdi, &cgc);
2820 if (ret)
2821 return ret;
2822
2823 buflen = be16_to_cpu(ti->track_information_length) +
2824 sizeof(ti->track_information_length);
2825
2826 if (buflen > sizeof(track_information))
2827 buflen = sizeof(track_information);
2828
2829 cgc.cmd[8] = cgc.buflen = buflen;
2830 ret = cdo->generic_packet(cdi, &cgc);
2831 if (ret)
2832 return ret;
2833
2834 /* return actual fill size */
2835 return buflen;
2836}
2837
2838/* return the last written block on the CD-R media. this is for the udf
2839 file system. */
2840int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2841{
2842 struct cdrom_tocentry toc;
2843 disc_information di;
2844 track_information ti;
2845 __u32 last_track;
2846 int ret = -1, ti_size;
2847
2848 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2849 goto use_toc;
2850
2851 ret = cdrom_get_disc_info(cdi, &di);
2852 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2853 + sizeof(di.last_track_lsb)))
2854 goto use_toc;
2855
2856 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2857 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2858 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2859 if (ti_size < (int)offsetof(typeof(ti), track_start))
2860 goto use_toc;
2861
2862 /* if this track is blank, try the previous. */
2863 if (ti.blank) {
2864 if (last_track == 1)
2865 goto use_toc;
2866 last_track--;
2867 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2868 }
2869
2870 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2871 + sizeof(ti.track_size)))
2872 goto use_toc;
2873
2874 /* if last recorded field is valid, return it. */
2875 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2876 + sizeof(ti.last_rec_address))) {
2877 *last_written = be32_to_cpu(ti.last_rec_address);
2878 } else {
2879 /* make it up instead */
2880 *last_written = be32_to_cpu(ti.track_start) +
2881 be32_to_cpu(ti.track_size);
2882 if (ti.free_blocks)
2883 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2884 }
2885 return 0;
2886
2887 /* this is where we end up if the drive either can't do a
2888 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2889 it doesn't give enough information or fails. then we return
2890 the toc contents. */
2891use_toc:
2892 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2893 return -ENOSYS;
2894
2895 toc.cdte_format = CDROM_MSF;
2896 toc.cdte_track = CDROM_LEADOUT;
2897 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2898 return ret;
2899 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2900 *last_written = toc.cdte_addr.lba;
2901 return 0;
2902}
2903
2904/* return the next writable block. also for udf file system. */
2905static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2906 long *next_writable)
2907{
2908 disc_information di;
2909 track_information ti;
2910 __u16 last_track;
2911 int ret, ti_size;
2912
2913 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2914 goto use_last_written;
2915
2916 ret = cdrom_get_disc_info(cdi, &di);
2917 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2918 + sizeof(di.last_track_lsb))
2919 goto use_last_written;
2920
2921 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2922 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2923 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2924 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2925 goto use_last_written;
2926
2927 /* if this track is blank, try the previous. */
2928 if (ti.blank) {
2929 if (last_track == 1)
2930 goto use_last_written;
2931 last_track--;
2932 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2933 if (ti_size < 0)
2934 goto use_last_written;
2935 }
2936
2937 /* if next recordable address field is valid, use it. */
2938 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2939 + sizeof(ti.next_writable)) {
2940 *next_writable = be32_to_cpu(ti.next_writable);
2941 return 0;
2942 }
2943
2944use_last_written:
2945 ret = cdrom_get_last_written(cdi, next_writable);
2946 if (ret) {
2947 *next_writable = 0;
2948 return ret;
2949 } else {
2950 *next_writable += 7;
2951 return 0;
2952 }
2953}
2954
2955static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2956 void __user *arg,
2957 struct packet_command *cgc,
2958 int cmd)
2959{
2960 struct scsi_sense_hdr sshdr;
2961 struct cdrom_msf msf;
2962 int blocksize = 0, format = 0, lba;
2963 int ret;
2964
2965 switch (cmd) {
2966 case CDROMREADRAW:
2967 blocksize = CD_FRAMESIZE_RAW;
2968 break;
2969 case CDROMREADMODE1:
2970 blocksize = CD_FRAMESIZE;
2971 format = 2;
2972 break;
2973 case CDROMREADMODE2:
2974 blocksize = CD_FRAMESIZE_RAW0;
2975 break;
2976 }
2977 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2978 return -EFAULT;
2979 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2980 /* FIXME: we need upper bound checking, too!! */
2981 if (lba < 0)
2982 return -EINVAL;
2983
2984 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2985 if (cgc->buffer == NULL)
2986 return -ENOMEM;
2987
2988 memset(&sshdr, 0, sizeof(sshdr));
2989 cgc->sshdr = &sshdr;
2990 cgc->data_direction = CGC_DATA_READ;
2991 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2992 if (ret && sshdr.sense_key == 0x05 &&
2993 sshdr.asc == 0x20 &&
2994 sshdr.ascq == 0x00) {
2995 /*
2996 * SCSI-II devices are not required to support
2997 * READ_CD, so let's try switching block size
2998 */
2999 /* FIXME: switch back again... */
3000 ret = cdrom_switch_blocksize(cdi, blocksize);
3001 if (ret)
3002 goto out;
3003 cgc->sshdr = NULL;
3004 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
3005 ret |= cdrom_switch_blocksize(cdi, blocksize);
3006 }
3007 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
3008 ret = -EFAULT;
3009out:
3010 kfree(cgc->buffer);
3011 return ret;
3012}
3013
3014static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3015 void __user *arg)
3016{
3017 struct cdrom_read_audio ra;
3018 int lba;
3019
3020#ifdef CONFIG_COMPAT
3021 if (in_compat_syscall()) {
3022 struct compat_cdrom_read_audio {
3023 union cdrom_addr addr;
3024 u8 addr_format;
3025 compat_int_t nframes;
3026 compat_caddr_t buf;
3027 } ra32;
3028
3029 if (copy_from_user(&ra32, arg, sizeof(ra32)))
3030 return -EFAULT;
3031
3032 ra = (struct cdrom_read_audio) {
3033 .addr = ra32.addr,
3034 .addr_format = ra32.addr_format,
3035 .nframes = ra32.nframes,
3036 .buf = compat_ptr(ra32.buf),
3037 };
3038 } else
3039#endif
3040 {
3041 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3042 sizeof(ra)))
3043 return -EFAULT;
3044 }
3045
3046 if (ra.addr_format == CDROM_MSF)
3047 lba = msf_to_lba(ra.addr.msf.minute,
3048 ra.addr.msf.second,
3049 ra.addr.msf.frame);
3050 else if (ra.addr_format == CDROM_LBA)
3051 lba = ra.addr.lba;
3052 else
3053 return -EINVAL;
3054
3055 /* FIXME: we need upper bound checking, too!! */
3056 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3057 return -EINVAL;
3058
3059 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3060}
3061
3062static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3063 void __user *arg)
3064{
3065 int ret;
3066 struct cdrom_subchnl q;
3067 u_char requested, back;
3068 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3069 return -EFAULT;
3070 requested = q.cdsc_format;
3071 if (!((requested == CDROM_MSF) ||
3072 (requested == CDROM_LBA)))
3073 return -EINVAL;
3074
3075 ret = cdrom_read_subchannel(cdi, &q, 0);
3076 if (ret)
3077 return ret;
3078 back = q.cdsc_format; /* local copy */
3079 sanitize_format(&q.cdsc_absaddr, &back, requested);
3080 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3081 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3082 return -EFAULT;
3083 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3084 return 0;
3085}
3086
3087static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3088 void __user *arg,
3089 struct packet_command *cgc)
3090{
3091 const struct cdrom_device_ops *cdo = cdi->ops;
3092 struct cdrom_msf msf;
3093 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3094 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3095 return -EFAULT;
3096 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3097 cgc->cmd[3] = msf.cdmsf_min0;
3098 cgc->cmd[4] = msf.cdmsf_sec0;
3099 cgc->cmd[5] = msf.cdmsf_frame0;
3100 cgc->cmd[6] = msf.cdmsf_min1;
3101 cgc->cmd[7] = msf.cdmsf_sec1;
3102 cgc->cmd[8] = msf.cdmsf_frame1;
3103 cgc->data_direction = CGC_DATA_NONE;
3104 return cdo->generic_packet(cdi, cgc);
3105}
3106
3107static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3108 void __user *arg,
3109 struct packet_command *cgc)
3110{
3111 const struct cdrom_device_ops *cdo = cdi->ops;
3112 struct cdrom_blk blk;
3113 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3114 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3115 return -EFAULT;
3116 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3117 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3118 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3119 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3120 cgc->cmd[5] = blk.from & 0xff;
3121 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3122 cgc->cmd[8] = blk.len & 0xff;
3123 cgc->data_direction = CGC_DATA_NONE;
3124 return cdo->generic_packet(cdi, cgc);
3125}
3126
3127static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3128 void __user *arg,
3129 struct packet_command *cgc,
3130 unsigned int cmd)
3131{
3132 struct cdrom_volctrl volctrl;
3133 unsigned char buffer[32];
3134 char mask[sizeof(buffer)];
3135 unsigned short offset;
3136 int ret;
3137
3138 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3139
3140 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3141 sizeof(volctrl)))
3142 return -EFAULT;
3143
3144 cgc->buffer = buffer;
3145 cgc->buflen = 24;
3146 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3147 if (ret)
3148 return ret;
3149
3150 /* originally the code depended on buffer[1] to determine
3151 how much data is available for transfer. buffer[1] is
3152 unfortunately ambigious and the only reliable way seem
3153 to be to simply skip over the block descriptor... */
3154 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3155
3156 if (offset + 16 > sizeof(buffer))
3157 return -E2BIG;
3158
3159 if (offset + 16 > cgc->buflen) {
3160 cgc->buflen = offset + 16;
3161 ret = cdrom_mode_sense(cdi, cgc,
3162 GPMODE_AUDIO_CTL_PAGE, 0);
3163 if (ret)
3164 return ret;
3165 }
3166
3167 /* sanity check */
3168 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3169 buffer[offset + 1] < 14)
3170 return -EINVAL;
3171
3172 /* now we have the current volume settings. if it was only
3173 a CDROMVOLREAD, return these values */
3174 if (cmd == CDROMVOLREAD) {
3175 volctrl.channel0 = buffer[offset+9];
3176 volctrl.channel1 = buffer[offset+11];
3177 volctrl.channel2 = buffer[offset+13];
3178 volctrl.channel3 = buffer[offset+15];
3179 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3180 sizeof(volctrl)))
3181 return -EFAULT;
3182 return 0;
3183 }
3184
3185 /* get the volume mask */
3186 cgc->buffer = mask;
3187 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3188 if (ret)
3189 return ret;
3190
3191 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3192 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3193 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3194 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3195
3196 /* set volume */
3197 cgc->buffer = buffer + offset - 8;
3198 memset(cgc->buffer, 0, 8);
3199 return cdrom_mode_select(cdi, cgc);
3200}
3201
3202static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3203 struct packet_command *cgc,
3204 int cmd)
3205{
3206 const struct cdrom_device_ops *cdo = cdi->ops;
3207 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3208 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3209 cgc->cmd[1] = 1;
3210 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3211 cgc->data_direction = CGC_DATA_NONE;
3212 return cdo->generic_packet(cdi, cgc);
3213}
3214
3215static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3216 struct packet_command *cgc,
3217 int cmd)
3218{
3219 const struct cdrom_device_ops *cdo = cdi->ops;
3220 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3221 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3222 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3223 cgc->data_direction = CGC_DATA_NONE;
3224 return cdo->generic_packet(cdi, cgc);
3225}
3226
3227static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3228 void __user *arg,
3229 struct packet_command *cgc)
3230{
3231 int ret;
3232 dvd_struct *s;
3233 int size = sizeof(dvd_struct);
3234
3235 if (!CDROM_CAN(CDC_DVD))
3236 return -ENOSYS;
3237
3238 s = memdup_user(arg, size);
3239 if (IS_ERR(s))
3240 return PTR_ERR(s);
3241
3242 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3243
3244 ret = dvd_read_struct(cdi, s, cgc);
3245 if (ret)
3246 goto out;
3247
3248 if (copy_to_user(arg, s, size))
3249 ret = -EFAULT;
3250out:
3251 kfree(s);
3252 return ret;
3253}
3254
3255static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3256 void __user *arg)
3257{
3258 int ret;
3259 dvd_authinfo ai;
3260 if (!CDROM_CAN(CDC_DVD))
3261 return -ENOSYS;
3262 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3263 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3264 return -EFAULT;
3265 ret = dvd_do_auth(cdi, &ai);
3266 if (ret)
3267 return ret;
3268 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3269 return -EFAULT;
3270 return 0;
3271}
3272
3273static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3274 void __user *arg)
3275{
3276 int ret;
3277 long next = 0;
3278 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3279 ret = cdrom_get_next_writable(cdi, &next);
3280 if (ret)
3281 return ret;
3282 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3283 return -EFAULT;
3284 return 0;
3285}
3286
3287static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3288 void __user *arg)
3289{
3290 int ret;
3291 long last = 0;
3292 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3293 ret = cdrom_get_last_written(cdi, &last);
3294 if (ret)
3295 return ret;
3296 if (in_compat_syscall())
3297 return put_user(last, (__s32 __user *)arg);
3298
3299 return put_user(last, (long __user *)arg);
3300}
3301
3302static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3303 unsigned long arg)
3304{
3305 struct packet_command cgc;
3306 void __user *userptr = (void __user *)arg;
3307
3308 memset(&cgc, 0, sizeof(cgc));
3309
3310 /* build a unified command and queue it through
3311 cdo->generic_packet() */
3312 switch (cmd) {
3313 case CDROMREADRAW:
3314 case CDROMREADMODE1:
3315 case CDROMREADMODE2:
3316 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3317 case CDROMREADAUDIO:
3318 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3319 case CDROMSUBCHNL:
3320 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3321 case CDROMPLAYMSF:
3322 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3323 case CDROMPLAYBLK:
3324 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3325 case CDROMVOLCTRL:
3326 case CDROMVOLREAD:
3327 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3328 case CDROMSTART:
3329 case CDROMSTOP:
3330 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3331 case CDROMPAUSE:
3332 case CDROMRESUME:
3333 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3334 case DVD_READ_STRUCT:
3335 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3336 case DVD_AUTH:
3337 return mmc_ioctl_dvd_auth(cdi, userptr);
3338 case CDROM_NEXT_WRITABLE:
3339 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3340 case CDROM_LAST_WRITTEN:
3341 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3342 }
3343
3344 return -ENOTTY;
3345}
3346
3347/*
3348 * Just about every imaginable ioctl is supported in the Uniform layer
3349 * these days.
3350 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3351 */
3352int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3353 fmode_t mode, unsigned int cmd, unsigned long arg)
3354{
3355 void __user *argp = (void __user *)arg;
3356 int ret;
3357
3358 /*
3359 * Try the generic SCSI command ioctl's first.
3360 */
3361 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3362 if (ret != -ENOTTY)
3363 return ret;
3364
3365 switch (cmd) {
3366 case CDROMMULTISESSION:
3367 return cdrom_ioctl_multisession(cdi, argp);
3368 case CDROMEJECT:
3369 return cdrom_ioctl_eject(cdi);
3370 case CDROMCLOSETRAY:
3371 return cdrom_ioctl_closetray(cdi);
3372 case CDROMEJECT_SW:
3373 return cdrom_ioctl_eject_sw(cdi, arg);
3374 case CDROM_MEDIA_CHANGED:
3375 return cdrom_ioctl_media_changed(cdi, arg);
3376 case CDROM_SET_OPTIONS:
3377 return cdrom_ioctl_set_options(cdi, arg);
3378 case CDROM_CLEAR_OPTIONS:
3379 return cdrom_ioctl_clear_options(cdi, arg);
3380 case CDROM_SELECT_SPEED:
3381 return cdrom_ioctl_select_speed(cdi, arg);
3382 case CDROM_SELECT_DISC:
3383 return cdrom_ioctl_select_disc(cdi, arg);
3384 case CDROMRESET:
3385 return cdrom_ioctl_reset(cdi, bdev);
3386 case CDROM_LOCKDOOR:
3387 return cdrom_ioctl_lock_door(cdi, arg);
3388 case CDROM_DEBUG:
3389 return cdrom_ioctl_debug(cdi, arg);
3390 case CDROM_GET_CAPABILITY:
3391 return cdrom_ioctl_get_capability(cdi);
3392 case CDROM_GET_MCN:
3393 return cdrom_ioctl_get_mcn(cdi, argp);
3394 case CDROM_DRIVE_STATUS:
3395 return cdrom_ioctl_drive_status(cdi, arg);
3396 case CDROM_DISC_STATUS:
3397 return cdrom_ioctl_disc_status(cdi);
3398 case CDROM_CHANGER_NSLOTS:
3399 return cdrom_ioctl_changer_nslots(cdi);
3400 }
3401
3402 /*
3403 * Use the ioctls that are implemented through the generic_packet()
3404 * interface. this may look at bit funny, but if -ENOTTY is
3405 * returned that particular ioctl is not implemented and we
3406 * let it go through the device specific ones.
3407 */
3408 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3409 ret = mmc_ioctl(cdi, cmd, arg);
3410 if (ret != -ENOTTY)
3411 return ret;
3412 }
3413
3414 /*
3415 * Note: most of the cd_dbg() calls are commented out here,
3416 * because they fill up the sys log when CD players poll
3417 * the drive.
3418 */
3419 switch (cmd) {
3420 case CDROMSUBCHNL:
3421 return cdrom_ioctl_get_subchnl(cdi, argp);
3422 case CDROMREADTOCHDR:
3423 return cdrom_ioctl_read_tochdr(cdi, argp);
3424 case CDROMREADTOCENTRY:
3425 return cdrom_ioctl_read_tocentry(cdi, argp);
3426 case CDROMPLAYMSF:
3427 return cdrom_ioctl_play_msf(cdi, argp);
3428 case CDROMPLAYTRKIND:
3429 return cdrom_ioctl_play_trkind(cdi, argp);
3430 case CDROMVOLCTRL:
3431 return cdrom_ioctl_volctrl(cdi, argp);
3432 case CDROMVOLREAD:
3433 return cdrom_ioctl_volread(cdi, argp);
3434 case CDROMSTART:
3435 case CDROMSTOP:
3436 case CDROMPAUSE:
3437 case CDROMRESUME:
3438 return cdrom_ioctl_audioctl(cdi, cmd);
3439 }
3440
3441 return -ENOSYS;
3442}
3443
3444EXPORT_SYMBOL(cdrom_get_last_written);
3445EXPORT_SYMBOL(register_cdrom);
3446EXPORT_SYMBOL(unregister_cdrom);
3447EXPORT_SYMBOL(cdrom_open);
3448EXPORT_SYMBOL(cdrom_release);
3449EXPORT_SYMBOL(cdrom_ioctl);
3450EXPORT_SYMBOL(cdrom_number_of_slots);
3451EXPORT_SYMBOL(cdrom_mode_select);
3452EXPORT_SYMBOL(cdrom_mode_sense);
3453EXPORT_SYMBOL(init_cdrom_command);
3454EXPORT_SYMBOL(cdrom_get_media_event);
3455
3456#ifdef CONFIG_SYSCTL
3457
3458#define CDROM_STR_SIZE 1000
3459
3460static struct cdrom_sysctl_settings {
3461 char info[CDROM_STR_SIZE]; /* general info */
3462 int autoclose; /* close tray upon mount, etc */
3463 int autoeject; /* eject on umount */
3464 int debug; /* turn on debugging messages */
3465 int lock; /* lock the door on device open */
3466 int check; /* check media type */
3467} cdrom_sysctl_settings;
3468
3469enum cdrom_print_option {
3470 CTL_NAME,
3471 CTL_SPEED,
3472 CTL_SLOTS,
3473 CTL_CAPABILITY
3474};
3475
3476static int cdrom_print_info(const char *header, int val, char *info,
3477 int *pos, enum cdrom_print_option option)
3478{
3479 const int max_size = sizeof(cdrom_sysctl_settings.info);
3480 struct cdrom_device_info *cdi;
3481 int ret;
3482
3483 ret = scnprintf(info + *pos, max_size - *pos, header);
3484 if (!ret)
3485 return 1;
3486
3487 *pos += ret;
3488
3489 list_for_each_entry(cdi, &cdrom_list, list) {
3490 switch (option) {
3491 case CTL_NAME:
3492 ret = scnprintf(info + *pos, max_size - *pos,
3493 "\t%s", cdi->name);
3494 break;
3495 case CTL_SPEED:
3496 ret = scnprintf(info + *pos, max_size - *pos,
3497 "\t%d", cdi->speed);
3498 break;
3499 case CTL_SLOTS:
3500 ret = scnprintf(info + *pos, max_size - *pos,
3501 "\t%d", cdi->capacity);
3502 break;
3503 case CTL_CAPABILITY:
3504 ret = scnprintf(info + *pos, max_size - *pos,
3505 "\t%d", CDROM_CAN(val) != 0);
3506 break;
3507 default:
3508 pr_info("invalid option%d\n", option);
3509 return 1;
3510 }
3511 if (!ret)
3512 return 1;
3513 *pos += ret;
3514 }
3515
3516 return 0;
3517}
3518
3519static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3520 void *buffer, size_t *lenp, loff_t *ppos)
3521{
3522 int pos;
3523 char *info = cdrom_sysctl_settings.info;
3524 const int max_size = sizeof(cdrom_sysctl_settings.info);
3525
3526 if (!*lenp || (*ppos && !write)) {
3527 *lenp = 0;
3528 return 0;
3529 }
3530
3531 mutex_lock(&cdrom_mutex);
3532
3533 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3534
3535 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3536 goto done;
3537 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3538 goto done;
3539 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3540 goto done;
3541 if (cdrom_print_info("\nCan close tray:\t",
3542 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3543 goto done;
3544 if (cdrom_print_info("\nCan open tray:\t",
3545 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3546 goto done;
3547 if (cdrom_print_info("\nCan lock tray:\t",
3548 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3549 goto done;
3550 if (cdrom_print_info("\nCan change speed:",
3551 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3552 goto done;
3553 if (cdrom_print_info("\nCan select disk:",
3554 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3555 goto done;
3556 if (cdrom_print_info("\nCan read multisession:",
3557 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3558 goto done;
3559 if (cdrom_print_info("\nCan read MCN:\t",
3560 CDC_MCN, info, &pos, CTL_CAPABILITY))
3561 goto done;
3562 if (cdrom_print_info("\nReports media changed:",
3563 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3564 goto done;
3565 if (cdrom_print_info("\nCan play audio:\t",
3566 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3567 goto done;
3568 if (cdrom_print_info("\nCan write CD-R:\t",
3569 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3570 goto done;
3571 if (cdrom_print_info("\nCan write CD-RW:",
3572 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3573 goto done;
3574 if (cdrom_print_info("\nCan read DVD:\t",
3575 CDC_DVD, info, &pos, CTL_CAPABILITY))
3576 goto done;
3577 if (cdrom_print_info("\nCan write DVD-R:",
3578 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3579 goto done;
3580 if (cdrom_print_info("\nCan write DVD-RAM:",
3581 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3582 goto done;
3583 if (cdrom_print_info("\nCan read MRW:\t",
3584 CDC_MRW, info, &pos, CTL_CAPABILITY))
3585 goto done;
3586 if (cdrom_print_info("\nCan write MRW:\t",
3587 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3588 goto done;
3589 if (cdrom_print_info("\nCan write RAM:\t",
3590 CDC_RAM, info, &pos, CTL_CAPABILITY))
3591 goto done;
3592 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3593 goto done;
3594doit:
3595 mutex_unlock(&cdrom_mutex);
3596 return proc_dostring(ctl, write, buffer, lenp, ppos);
3597done:
3598 pr_info("info buffer too small\n");
3599 goto doit;
3600}
3601
3602/* Unfortunately, per device settings are not implemented through
3603 procfs/sysctl yet. When they are, this will naturally disappear. For now
3604 just update all drives. Later this will become the template on which
3605 new registered drives will be based. */
3606static void cdrom_update_settings(void)
3607{
3608 struct cdrom_device_info *cdi;
3609
3610 mutex_lock(&cdrom_mutex);
3611 list_for_each_entry(cdi, &cdrom_list, list) {
3612 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3613 cdi->options |= CDO_AUTO_CLOSE;
3614 else if (!autoclose)
3615 cdi->options &= ~CDO_AUTO_CLOSE;
3616 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3617 cdi->options |= CDO_AUTO_EJECT;
3618 else if (!autoeject)
3619 cdi->options &= ~CDO_AUTO_EJECT;
3620 if (lockdoor && CDROM_CAN(CDC_LOCK))
3621 cdi->options |= CDO_LOCK;
3622 else if (!lockdoor)
3623 cdi->options &= ~CDO_LOCK;
3624 if (check_media_type)
3625 cdi->options |= CDO_CHECK_TYPE;
3626 else
3627 cdi->options &= ~CDO_CHECK_TYPE;
3628 }
3629 mutex_unlock(&cdrom_mutex);
3630}
3631
3632static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3633 void *buffer, size_t *lenp, loff_t *ppos)
3634{
3635 int ret;
3636
3637 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3638
3639 if (write) {
3640
3641 /* we only care for 1 or 0. */
3642 autoclose = !!cdrom_sysctl_settings.autoclose;
3643 autoeject = !!cdrom_sysctl_settings.autoeject;
3644 debug = !!cdrom_sysctl_settings.debug;
3645 lockdoor = !!cdrom_sysctl_settings.lock;
3646 check_media_type = !!cdrom_sysctl_settings.check;
3647
3648 /* update the option flags according to the changes. we
3649 don't have per device options through sysctl yet,
3650 but we will have and then this will disappear. */
3651 cdrom_update_settings();
3652 }
3653
3654 return ret;
3655}
3656
3657/* Place files in /proc/sys/dev/cdrom */
3658static struct ctl_table cdrom_table[] = {
3659 {
3660 .procname = "info",
3661 .data = &cdrom_sysctl_settings.info,
3662 .maxlen = CDROM_STR_SIZE,
3663 .mode = 0444,
3664 .proc_handler = cdrom_sysctl_info,
3665 },
3666 {
3667 .procname = "autoclose",
3668 .data = &cdrom_sysctl_settings.autoclose,
3669 .maxlen = sizeof(int),
3670 .mode = 0644,
3671 .proc_handler = cdrom_sysctl_handler,
3672 },
3673 {
3674 .procname = "autoeject",
3675 .data = &cdrom_sysctl_settings.autoeject,
3676 .maxlen = sizeof(int),
3677 .mode = 0644,
3678 .proc_handler = cdrom_sysctl_handler,
3679 },
3680 {
3681 .procname = "debug",
3682 .data = &cdrom_sysctl_settings.debug,
3683 .maxlen = sizeof(int),
3684 .mode = 0644,
3685 .proc_handler = cdrom_sysctl_handler,
3686 },
3687 {
3688 .procname = "lock",
3689 .data = &cdrom_sysctl_settings.lock,
3690 .maxlen = sizeof(int),
3691 .mode = 0644,
3692 .proc_handler = cdrom_sysctl_handler,
3693 },
3694 {
3695 .procname = "check_media",
3696 .data = &cdrom_sysctl_settings.check,
3697 .maxlen = sizeof(int),
3698 .mode = 0644,
3699 .proc_handler = cdrom_sysctl_handler
3700 },
3701 { }
3702};
3703
3704static struct ctl_table cdrom_cdrom_table[] = {
3705 {
3706 .procname = "cdrom",
3707 .maxlen = 0,
3708 .mode = 0555,
3709 .child = cdrom_table,
3710 },
3711 { }
3712};
3713
3714/* Make sure that /proc/sys/dev is there */
3715static struct ctl_table cdrom_root_table[] = {
3716 {
3717 .procname = "dev",
3718 .maxlen = 0,
3719 .mode = 0555,
3720 .child = cdrom_cdrom_table,
3721 },
3722 { }
3723};
3724static struct ctl_table_header *cdrom_sysctl_header;
3725
3726static void cdrom_sysctl_register(void)
3727{
3728 static atomic_t initialized = ATOMIC_INIT(0);
3729
3730 if (!atomic_add_unless(&initialized, 1, 1))
3731 return;
3732
3733 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3734
3735 /* set the defaults */
3736 cdrom_sysctl_settings.autoclose = autoclose;
3737 cdrom_sysctl_settings.autoeject = autoeject;
3738 cdrom_sysctl_settings.debug = debug;
3739 cdrom_sysctl_settings.lock = lockdoor;
3740 cdrom_sysctl_settings.check = check_media_type;
3741}
3742
3743static void cdrom_sysctl_unregister(void)
3744{
3745 if (cdrom_sysctl_header)
3746 unregister_sysctl_table(cdrom_sysctl_header);
3747}
3748
3749#else /* CONFIG_SYSCTL */
3750
3751static void cdrom_sysctl_register(void)
3752{
3753}
3754
3755static void cdrom_sysctl_unregister(void)
3756{
3757}
3758
3759#endif /* CONFIG_SYSCTL */
3760
3761static int __init cdrom_init(void)
3762{
3763 cdrom_sysctl_register();
3764
3765 return 0;
3766}
3767
3768static void __exit cdrom_exit(void)
3769{
3770 pr_info("Uniform CD-ROM driver unloaded\n");
3771 cdrom_sysctl_unregister();
3772}
3773
3774module_init(cdrom_init);
3775module_exit(cdrom_exit);
3776MODULE_LICENSE("GPL");
1/* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.rst for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to actively
34 maintain and improve this driver, I am now carrying on the torch. If
35 you have a problem with this driver, please feel free to contact me.
36
37 -- Added (rudimentary) sysctl interface. I realize this is really weak
38 right now, and is _very_ badly implemented. It will be improved...
39
40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
41 the Uniform CD-ROM driver via the cdrom_count_tracks function.
42 The cdrom_count_tracks function helps resolve some of the false
43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
44 for the correct media type when mounting or playing audio from a CD.
45
46 -- Remove the calls to verify_area and only use the copy_from_user and
47 copy_to_user stuff, since these calls now provide their own memory
48 checking with the 2.1.x kernels.
49
50 -- Major update to return codes so that errors from low-level drivers
51 are passed on through (thanks to Gerd Knorr for pointing out this
52 problem).
53
54 -- Made it so if a function isn't implemented in a low-level driver,
55 ENOSYS is now returned instead of EINVAL.
56
57 -- Simplified some complex logic so that the source code is easier to read.
58
59 -- Other stuff I probably forgot to mention (lots of changes).
60
612.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
63
642.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
66 copy_*_user does not return EFAULT on error, but instead returns the number
67 of bytes not copied. I was returning whatever non-zero stuff came back from
68 the copy_*_user functions directly, which would result in strange errors.
69
702.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
73 this out and providing a simple fix.
74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
75 thanks to Andrea Arcangeli
76 -- Fixed it so that the /proc entry now also shows up when cdrom is
77 compiled into the kernel. Before it only worked when loaded as a module.
78
79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
80 -- Fixed a bug in cdrom_media_changed and handling of reporting that
81 the media had changed for devices that _don't_ implement media_changed.
82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
83 -- Made a few things more pedanticly correct.
84
852.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
86 -- New maintainers! Erik was too busy to continue the work on the driver,
87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
88 will do their best to follow in his footsteps
89
90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
91 -- Check if drive is capable of doing what we ask before blindly changing
92 cdi->options in various ioctl.
93 -- Added version to proc entry.
94
95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixed an error in open_for_data where we would sometimes not return
97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
98 -- Fixed module usage count - usage was based on /proc/sys/dev
99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
101 dev would be removed even though it was used. cdrom.c just illuminated
102 that bug.
103
104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
106 been "rewritten" because capabilities and options aren't in sync. They
107 should be...
108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
109 -- Added CDROM_RESET ioctl.
110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
112 from parsing /proc/sys/dev/cdrom/info.
113
114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
115 -- Check capability mask from low level driver when counting tracks as
116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
117
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
120 CDC_CLOSE_TRAY.
121 -- proc info didn't mask against capabilities mask.
122
123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
125 code was duplicated before. Drives that support the generic packet
126 interface are now being fed packets from here instead.
127 -- First attempt at adding support for MMC2 commands - for DVD and
128 CD-R(W) drives. Only the DVD parts are in now - the interface used is
129 the same as for the audio ioctls.
130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
131 a change to perform device specific ioctls as well.
132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
133 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
134 and lock.
135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
136 CD-Rx and DVD capabilities.
137 -- Now default to checking media type.
138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
139 doing this anyway, with the generic_packet addition.
140
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
143 correctly.
144 -- Fix up ioctl handling so the device specific ones actually get
145 called :).
146
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
149 page).
150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
151 <andrewtv@usa.net> for telling me and for having defined the various
152 DVD structures and ioctls in the first place! He designed the original
153 DVD patches for ide-cd and while I rearranged and unified them, the
154 interface is still the same.
155
156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
159 -- Moved the CDROMREADxxx ioctls in here.
160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
161 and exported functions.
162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
163 to now read GPCMD_ for the new generic packet interface. All low level
164 drivers are updated as well.
165 -- Various other cleanups.
166
167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
168 -- Fixed a couple of possible memory leaks (if an operation failed and
169 we didn't free the buffer before returning the error).
170 -- Integrated Uniform CD Changer handling from Richard Sharman
171 <rsharman@pobox.com>.
172 -- Defined CD_DVD and CD_CHANGER log levels.
173 -- Fixed the CDROMREADxxx ioctls.
174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
175 drives supported it. We lose the index part, however.
176 -- Small modifications to accommodate opens of /dev/hdc1, required
177 for ide-cd to handle multisession discs.
178 -- Export cdrom_mode_sense and cdrom_mode_select.
179 -- init_cdrom_command() for setting up a cgc command.
180
181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
183 impossible to send the drive data in a sensible way.
184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
185 dvd_read_manufact.
186 -- Added setup of write mode for packet writing.
187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
188 number of frames and split the reads in blocks of 8.
189
190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
191 -- Added support for changing the region of DVD drives.
192 -- Added sense data to generic command.
193
194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
195 -- Do same "read header length" trick in cdrom_get_disc_info() as
196 we do in cdrom_get_track_info() -- some drive don't obey specs and
197 fail if they can't supply the full Mt Fuji size table.
198 -- Deleted stuff related to setting up write modes. It has a different
199 home now.
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
202
203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
204 -- Fix direction flag in setup_send_key and setup_report_key. This
205 gave some SCSI adapters problems.
206 -- Always return -EROFS for write opens
207 -- Convert to module_init/module_exit style init and remove some
208 of the #ifdef MODULE stuff
209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
212 did not clear a 0 sized buffer.
213
214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
216 that case switch block size and issue plain READ_10 again, then switch
217 back.
218
219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
220 -- Fix volume control on CD's - old SCSI-II drives now use their own
221 code, as doing MODE6 stuff in here is really not my intention.
222 -- Use READ_DISC_INFO for more reliable end-of-disc.
223
224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
225 -- Fix bug in getting rpc phase 2 region info.
226 -- Reinstate "correct" CDROMPLAYTRKIND
227
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
230
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
233 -- Locking fixes
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
236
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
239
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
242
243-------------------------------------------------------------------------*/
244
245#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
246
247#define REVISION "Revision: 3.20"
248#define VERSION "Id: cdrom.c 3.20 2003/12/17"
249
250/* I use an error-log mask to give fine grain control over the type of
251 messages dumped to the system logs. The available masks include: */
252#define CD_NOTHING 0x0
253#define CD_WARNING 0x1
254#define CD_REG_UNREG 0x2
255#define CD_DO_IOCTL 0x4
256#define CD_OPEN 0x8
257#define CD_CLOSE 0x10
258#define CD_COUNT_TRACKS 0x20
259#define CD_CHANGER 0x40
260#define CD_DVD 0x80
261
262/* Define this to remove _all_ the debugging messages */
263/* #define ERRLOGMASK CD_NOTHING */
264#define ERRLOGMASK CD_WARNING
265/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
266/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
267
268#include <linux/atomic.h>
269#include <linux/module.h>
270#include <linux/fs.h>
271#include <linux/major.h>
272#include <linux/types.h>
273#include <linux/errno.h>
274#include <linux/kernel.h>
275#include <linux/mm.h>
276#include <linux/slab.h>
277#include <linux/cdrom.h>
278#include <linux/sysctl.h>
279#include <linux/proc_fs.h>
280#include <linux/blkpg.h>
281#include <linux/init.h>
282#include <linux/fcntl.h>
283#include <linux/blkdev.h>
284#include <linux/times.h>
285#include <linux/uaccess.h>
286#include <scsi/scsi_common.h>
287#include <scsi/scsi_request.h>
288
289/* used to tell the module to turn on full debugging messages */
290static bool debug;
291/* default compatibility mode */
292static bool autoclose=1;
293static bool autoeject;
294static bool lockdoor = 1;
295/* will we ever get to use this... sigh. */
296static bool check_media_type;
297/* automatically restart mrw format */
298static bool mrw_format_restart = 1;
299module_param(debug, bool, 0);
300module_param(autoclose, bool, 0);
301module_param(autoeject, bool, 0);
302module_param(lockdoor, bool, 0);
303module_param(check_media_type, bool, 0);
304module_param(mrw_format_restart, bool, 0);
305
306static DEFINE_MUTEX(cdrom_mutex);
307
308static const char *mrw_format_status[] = {
309 "not mrw",
310 "bgformat inactive",
311 "bgformat active",
312 "mrw complete",
313};
314
315static const char *mrw_address_space[] = { "DMA", "GAA" };
316
317#if (ERRLOGMASK != CD_NOTHING)
318#define cd_dbg(type, fmt, ...) \
319do { \
320 if ((ERRLOGMASK & type) || debug == 1) \
321 pr_debug(fmt, ##__VA_ARGS__); \
322} while (0)
323#else
324#define cd_dbg(type, fmt, ...) \
325do { \
326 if (0 && (ERRLOGMASK & type) || debug == 1) \
327 pr_debug(fmt, ##__VA_ARGS__); \
328} while (0)
329#endif
330
331/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
332 a lot of places. This macro makes the code more clear. */
333#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
334
335/*
336 * Another popular OS uses 7 seconds as the hard timeout for default
337 * commands, so it is a good choice for us as well.
338 */
339#define CDROM_DEF_TIMEOUT (7 * HZ)
340
341/* Not-exported routines. */
342
343static void cdrom_sysctl_register(void);
344
345static LIST_HEAD(cdrom_list);
346
347int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
348 struct packet_command *cgc)
349{
350 if (cgc->sshdr) {
351 cgc->sshdr->sense_key = 0x05;
352 cgc->sshdr->asc = 0x20;
353 cgc->sshdr->ascq = 0x00;
354 }
355
356 cgc->stat = -EIO;
357 return -EIO;
358}
359EXPORT_SYMBOL(cdrom_dummy_generic_packet);
360
361static int cdrom_flush_cache(struct cdrom_device_info *cdi)
362{
363 struct packet_command cgc;
364
365 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
366 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
367
368 cgc.timeout = 5 * 60 * HZ;
369
370 return cdi->ops->generic_packet(cdi, &cgc);
371}
372
373/* requires CD R/RW */
374static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
375 disc_information *di)
376{
377 const struct cdrom_device_ops *cdo = cdi->ops;
378 struct packet_command cgc;
379 int ret, buflen;
380
381 /* set up command and get the disc info */
382 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
383 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
384 cgc.cmd[8] = cgc.buflen = 2;
385 cgc.quiet = 1;
386
387 ret = cdo->generic_packet(cdi, &cgc);
388 if (ret)
389 return ret;
390
391 /* not all drives have the same disc_info length, so requeue
392 * packet with the length the drive tells us it can supply
393 */
394 buflen = be16_to_cpu(di->disc_information_length) +
395 sizeof(di->disc_information_length);
396
397 if (buflen > sizeof(disc_information))
398 buflen = sizeof(disc_information);
399
400 cgc.cmd[8] = cgc.buflen = buflen;
401 ret = cdo->generic_packet(cdi, &cgc);
402 if (ret)
403 return ret;
404
405 /* return actual fill size */
406 return buflen;
407}
408
409/* This macro makes sure we don't have to check on cdrom_device_ops
410 * existence in the run-time routines below. Change_capability is a
411 * hack to have the capability flags defined const, while we can still
412 * change it here without gcc complaining at every line.
413 */
414#define ENSURE(cdo, call, bits) \
415do { \
416 if (cdo->call == NULL) \
417 WARN_ON_ONCE((cdo)->capability & (bits)); \
418} while (0)
419
420/*
421 * the first prototypes used 0x2c as the page code for the mrw mode page,
422 * subsequently this was changed to 0x03. probe the one used by this drive
423 */
424static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
425{
426 struct packet_command cgc;
427 char buffer[16];
428
429 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
430
431 cgc.timeout = HZ;
432 cgc.quiet = 1;
433
434 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
435 cdi->mrw_mode_page = MRW_MODE_PC;
436 return 0;
437 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
438 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
439 return 0;
440 }
441
442 return 1;
443}
444
445static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
446{
447 struct packet_command cgc;
448 struct mrw_feature_desc *mfd;
449 unsigned char buffer[16];
450 int ret;
451
452 *write = 0;
453
454 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
455
456 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
457 cgc.cmd[3] = CDF_MRW;
458 cgc.cmd[8] = sizeof(buffer);
459 cgc.quiet = 1;
460
461 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
462 return ret;
463
464 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
465 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
466 return 1;
467 *write = mfd->write;
468
469 if ((ret = cdrom_mrw_probe_pc(cdi))) {
470 *write = 0;
471 return ret;
472 }
473
474 return 0;
475}
476
477static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
478{
479 struct packet_command cgc;
480 unsigned char buffer[12];
481 int ret;
482
483 pr_info("%sstarting format\n", cont ? "Re" : "");
484
485 /*
486 * FmtData bit set (bit 4), format type is 1
487 */
488 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
489 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
490 cgc.cmd[1] = (1 << 4) | 1;
491
492 cgc.timeout = 5 * 60 * HZ;
493
494 /*
495 * 4 byte format list header, 8 byte format list descriptor
496 */
497 buffer[1] = 1 << 1;
498 buffer[3] = 8;
499
500 /*
501 * nr_blocks field
502 */
503 buffer[4] = 0xff;
504 buffer[5] = 0xff;
505 buffer[6] = 0xff;
506 buffer[7] = 0xff;
507
508 buffer[8] = 0x24 << 2;
509 buffer[11] = cont;
510
511 ret = cdi->ops->generic_packet(cdi, &cgc);
512 if (ret)
513 pr_info("bgformat failed\n");
514
515 return ret;
516}
517
518static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
519{
520 struct packet_command cgc;
521
522 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
523 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
524
525 /*
526 * Session = 1, Track = 0
527 */
528 cgc.cmd[1] = !!immed;
529 cgc.cmd[2] = 1 << 1;
530
531 cgc.timeout = 5 * 60 * HZ;
532
533 return cdi->ops->generic_packet(cdi, &cgc);
534}
535
536static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
537{
538 disc_information di;
539 int ret;
540
541 ret = cdrom_get_disc_info(cdi, &di);
542 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
543 return 1;
544
545 ret = 0;
546 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
547 pr_info("issuing MRW background format suspend\n");
548 ret = cdrom_mrw_bgformat_susp(cdi, 0);
549 }
550
551 if (!ret && cdi->media_written)
552 ret = cdrom_flush_cache(cdi);
553
554 return ret;
555}
556
557static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
558{
559 struct packet_command cgc;
560 struct mode_page_header *mph;
561 char buffer[16];
562 int ret, offset, size;
563
564 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
565
566 cgc.buffer = buffer;
567 cgc.buflen = sizeof(buffer);
568
569 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
570 if (ret)
571 return ret;
572
573 mph = (struct mode_page_header *)buffer;
574 offset = be16_to_cpu(mph->desc_length);
575 size = be16_to_cpu(mph->mode_data_length) + 2;
576
577 buffer[offset + 3] = space;
578 cgc.buflen = size;
579
580 ret = cdrom_mode_select(cdi, &cgc);
581 if (ret)
582 return ret;
583
584 pr_info("%s: mrw address space %s selected\n",
585 cdi->name, mrw_address_space[space]);
586 return 0;
587}
588
589int register_cdrom(struct 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_DRV_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(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 if (blocksize != CD_FRAMESIZE) {
3000 ret = cdrom_switch_blocksize(cdi, blocksize);
3001 if (ret)
3002 goto out;
3003 }
3004 cgc->sshdr = NULL;
3005 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
3006 if (blocksize != CD_FRAMESIZE)
3007 ret |= cdrom_switch_blocksize(cdi, CD_FRAMESIZE);
3008 }
3009 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
3010 ret = -EFAULT;
3011out:
3012 kfree(cgc->buffer);
3013 return ret;
3014}
3015
3016static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3017 void __user *arg)
3018{
3019 struct cdrom_read_audio ra;
3020 int lba;
3021
3022#ifdef CONFIG_COMPAT
3023 if (in_compat_syscall()) {
3024 struct compat_cdrom_read_audio {
3025 union cdrom_addr addr;
3026 u8 addr_format;
3027 compat_int_t nframes;
3028 compat_caddr_t buf;
3029 } ra32;
3030
3031 if (copy_from_user(&ra32, arg, sizeof(ra32)))
3032 return -EFAULT;
3033
3034 ra = (struct cdrom_read_audio) {
3035 .addr = ra32.addr,
3036 .addr_format = ra32.addr_format,
3037 .nframes = ra32.nframes,
3038 .buf = compat_ptr(ra32.buf),
3039 };
3040 } else
3041#endif
3042 {
3043 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3044 sizeof(ra)))
3045 return -EFAULT;
3046 }
3047
3048 if (ra.addr_format == CDROM_MSF)
3049 lba = msf_to_lba(ra.addr.msf.minute,
3050 ra.addr.msf.second,
3051 ra.addr.msf.frame);
3052 else if (ra.addr_format == CDROM_LBA)
3053 lba = ra.addr.lba;
3054 else
3055 return -EINVAL;
3056
3057 /* FIXME: we need upper bound checking, too!! */
3058 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3059 return -EINVAL;
3060
3061 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3062}
3063
3064static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3065 void __user *arg)
3066{
3067 int ret;
3068 struct cdrom_subchnl q;
3069 u_char requested, back;
3070 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3071 return -EFAULT;
3072 requested = q.cdsc_format;
3073 if (!((requested == CDROM_MSF) ||
3074 (requested == CDROM_LBA)))
3075 return -EINVAL;
3076
3077 ret = cdrom_read_subchannel(cdi, &q, 0);
3078 if (ret)
3079 return ret;
3080 back = q.cdsc_format; /* local copy */
3081 sanitize_format(&q.cdsc_absaddr, &back, requested);
3082 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3083 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3084 return -EFAULT;
3085 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3086 return 0;
3087}
3088
3089static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3090 void __user *arg,
3091 struct packet_command *cgc)
3092{
3093 const struct cdrom_device_ops *cdo = cdi->ops;
3094 struct cdrom_msf msf;
3095 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3096 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3097 return -EFAULT;
3098 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3099 cgc->cmd[3] = msf.cdmsf_min0;
3100 cgc->cmd[4] = msf.cdmsf_sec0;
3101 cgc->cmd[5] = msf.cdmsf_frame0;
3102 cgc->cmd[6] = msf.cdmsf_min1;
3103 cgc->cmd[7] = msf.cdmsf_sec1;
3104 cgc->cmd[8] = msf.cdmsf_frame1;
3105 cgc->data_direction = CGC_DATA_NONE;
3106 return cdo->generic_packet(cdi, cgc);
3107}
3108
3109static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3110 void __user *arg,
3111 struct packet_command *cgc)
3112{
3113 const struct cdrom_device_ops *cdo = cdi->ops;
3114 struct cdrom_blk blk;
3115 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3116 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3117 return -EFAULT;
3118 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3119 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3120 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3121 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3122 cgc->cmd[5] = blk.from & 0xff;
3123 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3124 cgc->cmd[8] = blk.len & 0xff;
3125 cgc->data_direction = CGC_DATA_NONE;
3126 return cdo->generic_packet(cdi, cgc);
3127}
3128
3129static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3130 void __user *arg,
3131 struct packet_command *cgc,
3132 unsigned int cmd)
3133{
3134 struct cdrom_volctrl volctrl;
3135 unsigned char buffer[32];
3136 char mask[sizeof(buffer)];
3137 unsigned short offset;
3138 int ret;
3139
3140 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3141
3142 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3143 sizeof(volctrl)))
3144 return -EFAULT;
3145
3146 cgc->buffer = buffer;
3147 cgc->buflen = 24;
3148 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3149 if (ret)
3150 return ret;
3151
3152 /* originally the code depended on buffer[1] to determine
3153 how much data is available for transfer. buffer[1] is
3154 unfortunately ambigious and the only reliable way seem
3155 to be to simply skip over the block descriptor... */
3156 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3157
3158 if (offset + 16 > sizeof(buffer))
3159 return -E2BIG;
3160
3161 if (offset + 16 > cgc->buflen) {
3162 cgc->buflen = offset + 16;
3163 ret = cdrom_mode_sense(cdi, cgc,
3164 GPMODE_AUDIO_CTL_PAGE, 0);
3165 if (ret)
3166 return ret;
3167 }
3168
3169 /* sanity check */
3170 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3171 buffer[offset + 1] < 14)
3172 return -EINVAL;
3173
3174 /* now we have the current volume settings. if it was only
3175 a CDROMVOLREAD, return these values */
3176 if (cmd == CDROMVOLREAD) {
3177 volctrl.channel0 = buffer[offset+9];
3178 volctrl.channel1 = buffer[offset+11];
3179 volctrl.channel2 = buffer[offset+13];
3180 volctrl.channel3 = buffer[offset+15];
3181 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3182 sizeof(volctrl)))
3183 return -EFAULT;
3184 return 0;
3185 }
3186
3187 /* get the volume mask */
3188 cgc->buffer = mask;
3189 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3190 if (ret)
3191 return ret;
3192
3193 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3194 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3195 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3196 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3197
3198 /* set volume */
3199 cgc->buffer = buffer + offset - 8;
3200 memset(cgc->buffer, 0, 8);
3201 return cdrom_mode_select(cdi, cgc);
3202}
3203
3204static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3205 struct packet_command *cgc,
3206 int cmd)
3207{
3208 const struct cdrom_device_ops *cdo = cdi->ops;
3209 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3210 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3211 cgc->cmd[1] = 1;
3212 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3213 cgc->data_direction = CGC_DATA_NONE;
3214 return cdo->generic_packet(cdi, cgc);
3215}
3216
3217static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3218 struct packet_command *cgc,
3219 int cmd)
3220{
3221 const struct cdrom_device_ops *cdo = cdi->ops;
3222 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3223 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3224 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3225 cgc->data_direction = CGC_DATA_NONE;
3226 return cdo->generic_packet(cdi, cgc);
3227}
3228
3229static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3230 void __user *arg,
3231 struct packet_command *cgc)
3232{
3233 int ret;
3234 dvd_struct *s;
3235 int size = sizeof(dvd_struct);
3236
3237 if (!CDROM_CAN(CDC_DVD))
3238 return -ENOSYS;
3239
3240 s = memdup_user(arg, size);
3241 if (IS_ERR(s))
3242 return PTR_ERR(s);
3243
3244 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3245
3246 ret = dvd_read_struct(cdi, s, cgc);
3247 if (ret)
3248 goto out;
3249
3250 if (copy_to_user(arg, s, size))
3251 ret = -EFAULT;
3252out:
3253 kfree(s);
3254 return ret;
3255}
3256
3257static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3258 void __user *arg)
3259{
3260 int ret;
3261 dvd_authinfo ai;
3262 if (!CDROM_CAN(CDC_DVD))
3263 return -ENOSYS;
3264 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3265 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3266 return -EFAULT;
3267 ret = dvd_do_auth(cdi, &ai);
3268 if (ret)
3269 return ret;
3270 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3271 return -EFAULT;
3272 return 0;
3273}
3274
3275static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3276 void __user *arg)
3277{
3278 int ret;
3279 long next = 0;
3280 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3281 ret = cdrom_get_next_writable(cdi, &next);
3282 if (ret)
3283 return ret;
3284 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3285 return -EFAULT;
3286 return 0;
3287}
3288
3289static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3290 void __user *arg)
3291{
3292 int ret;
3293 long last = 0;
3294 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3295 ret = cdrom_get_last_written(cdi, &last);
3296 if (ret)
3297 return ret;
3298 if (in_compat_syscall())
3299 return put_user(last, (__s32 __user *)arg);
3300
3301 return put_user(last, (long __user *)arg);
3302}
3303
3304static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3305 unsigned long arg)
3306{
3307 struct packet_command cgc;
3308 void __user *userptr = (void __user *)arg;
3309
3310 memset(&cgc, 0, sizeof(cgc));
3311
3312 /* build a unified command and queue it through
3313 cdo->generic_packet() */
3314 switch (cmd) {
3315 case CDROMREADRAW:
3316 case CDROMREADMODE1:
3317 case CDROMREADMODE2:
3318 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3319 case CDROMREADAUDIO:
3320 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3321 case CDROMSUBCHNL:
3322 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3323 case CDROMPLAYMSF:
3324 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3325 case CDROMPLAYBLK:
3326 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3327 case CDROMVOLCTRL:
3328 case CDROMVOLREAD:
3329 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3330 case CDROMSTART:
3331 case CDROMSTOP:
3332 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3333 case CDROMPAUSE:
3334 case CDROMRESUME:
3335 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3336 case DVD_READ_STRUCT:
3337 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3338 case DVD_AUTH:
3339 return mmc_ioctl_dvd_auth(cdi, userptr);
3340 case CDROM_NEXT_WRITABLE:
3341 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3342 case CDROM_LAST_WRITTEN:
3343 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3344 }
3345
3346 return -ENOTTY;
3347}
3348
3349/*
3350 * Just about every imaginable ioctl is supported in the Uniform layer
3351 * these days.
3352 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3353 */
3354int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3355 fmode_t mode, unsigned int cmd, unsigned long arg)
3356{
3357 void __user *argp = (void __user *)arg;
3358 int ret;
3359
3360 /*
3361 * Try the generic SCSI command ioctl's first.
3362 */
3363 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3364 if (ret != -ENOTTY)
3365 return ret;
3366
3367 switch (cmd) {
3368 case CDROMMULTISESSION:
3369 return cdrom_ioctl_multisession(cdi, argp);
3370 case CDROMEJECT:
3371 return cdrom_ioctl_eject(cdi);
3372 case CDROMCLOSETRAY:
3373 return cdrom_ioctl_closetray(cdi);
3374 case CDROMEJECT_SW:
3375 return cdrom_ioctl_eject_sw(cdi, arg);
3376 case CDROM_MEDIA_CHANGED:
3377 return cdrom_ioctl_media_changed(cdi, arg);
3378 case CDROM_SET_OPTIONS:
3379 return cdrom_ioctl_set_options(cdi, arg);
3380 case CDROM_CLEAR_OPTIONS:
3381 return cdrom_ioctl_clear_options(cdi, arg);
3382 case CDROM_SELECT_SPEED:
3383 return cdrom_ioctl_select_speed(cdi, arg);
3384 case CDROM_SELECT_DISC:
3385 return cdrom_ioctl_select_disc(cdi, arg);
3386 case CDROMRESET:
3387 return cdrom_ioctl_reset(cdi, bdev);
3388 case CDROM_LOCKDOOR:
3389 return cdrom_ioctl_lock_door(cdi, arg);
3390 case CDROM_DEBUG:
3391 return cdrom_ioctl_debug(cdi, arg);
3392 case CDROM_GET_CAPABILITY:
3393 return cdrom_ioctl_get_capability(cdi);
3394 case CDROM_GET_MCN:
3395 return cdrom_ioctl_get_mcn(cdi, argp);
3396 case CDROM_DRIVE_STATUS:
3397 return cdrom_ioctl_drive_status(cdi, arg);
3398 case CDROM_DISC_STATUS:
3399 return cdrom_ioctl_disc_status(cdi);
3400 case CDROM_CHANGER_NSLOTS:
3401 return cdrom_ioctl_changer_nslots(cdi);
3402 }
3403
3404 /*
3405 * Use the ioctls that are implemented through the generic_packet()
3406 * interface. this may look at bit funny, but if -ENOTTY is
3407 * returned that particular ioctl is not implemented and we
3408 * let it go through the device specific ones.
3409 */
3410 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3411 ret = mmc_ioctl(cdi, cmd, arg);
3412 if (ret != -ENOTTY)
3413 return ret;
3414 }
3415
3416 /*
3417 * Note: most of the cd_dbg() calls are commented out here,
3418 * because they fill up the sys log when CD players poll
3419 * the drive.
3420 */
3421 switch (cmd) {
3422 case CDROMSUBCHNL:
3423 return cdrom_ioctl_get_subchnl(cdi, argp);
3424 case CDROMREADTOCHDR:
3425 return cdrom_ioctl_read_tochdr(cdi, argp);
3426 case CDROMREADTOCENTRY:
3427 return cdrom_ioctl_read_tocentry(cdi, argp);
3428 case CDROMPLAYMSF:
3429 return cdrom_ioctl_play_msf(cdi, argp);
3430 case CDROMPLAYTRKIND:
3431 return cdrom_ioctl_play_trkind(cdi, argp);
3432 case CDROMVOLCTRL:
3433 return cdrom_ioctl_volctrl(cdi, argp);
3434 case CDROMVOLREAD:
3435 return cdrom_ioctl_volread(cdi, argp);
3436 case CDROMSTART:
3437 case CDROMSTOP:
3438 case CDROMPAUSE:
3439 case CDROMRESUME:
3440 return cdrom_ioctl_audioctl(cdi, cmd);
3441 }
3442
3443 return -ENOSYS;
3444}
3445
3446EXPORT_SYMBOL(cdrom_get_last_written);
3447EXPORT_SYMBOL(register_cdrom);
3448EXPORT_SYMBOL(unregister_cdrom);
3449EXPORT_SYMBOL(cdrom_open);
3450EXPORT_SYMBOL(cdrom_release);
3451EXPORT_SYMBOL(cdrom_ioctl);
3452EXPORT_SYMBOL(cdrom_number_of_slots);
3453EXPORT_SYMBOL(cdrom_mode_select);
3454EXPORT_SYMBOL(cdrom_mode_sense);
3455EXPORT_SYMBOL(init_cdrom_command);
3456EXPORT_SYMBOL(cdrom_get_media_event);
3457
3458#ifdef CONFIG_SYSCTL
3459
3460#define CDROM_STR_SIZE 1000
3461
3462static struct cdrom_sysctl_settings {
3463 char info[CDROM_STR_SIZE]; /* general info */
3464 int autoclose; /* close tray upon mount, etc */
3465 int autoeject; /* eject on umount */
3466 int debug; /* turn on debugging messages */
3467 int lock; /* lock the door on device open */
3468 int check; /* check media type */
3469} cdrom_sysctl_settings;
3470
3471enum cdrom_print_option {
3472 CTL_NAME,
3473 CTL_SPEED,
3474 CTL_SLOTS,
3475 CTL_CAPABILITY
3476};
3477
3478static int cdrom_print_info(const char *header, int val, char *info,
3479 int *pos, enum cdrom_print_option option)
3480{
3481 const int max_size = sizeof(cdrom_sysctl_settings.info);
3482 struct cdrom_device_info *cdi;
3483 int ret;
3484
3485 ret = scnprintf(info + *pos, max_size - *pos, header);
3486 if (!ret)
3487 return 1;
3488
3489 *pos += ret;
3490
3491 list_for_each_entry(cdi, &cdrom_list, list) {
3492 switch (option) {
3493 case CTL_NAME:
3494 ret = scnprintf(info + *pos, max_size - *pos,
3495 "\t%s", cdi->name);
3496 break;
3497 case CTL_SPEED:
3498 ret = scnprintf(info + *pos, max_size - *pos,
3499 "\t%d", cdi->speed);
3500 break;
3501 case CTL_SLOTS:
3502 ret = scnprintf(info + *pos, max_size - *pos,
3503 "\t%d", cdi->capacity);
3504 break;
3505 case CTL_CAPABILITY:
3506 ret = scnprintf(info + *pos, max_size - *pos,
3507 "\t%d", CDROM_CAN(val) != 0);
3508 break;
3509 default:
3510 pr_info("invalid option%d\n", option);
3511 return 1;
3512 }
3513 if (!ret)
3514 return 1;
3515 *pos += ret;
3516 }
3517
3518 return 0;
3519}
3520
3521static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3522 void *buffer, size_t *lenp, loff_t *ppos)
3523{
3524 int pos;
3525 char *info = cdrom_sysctl_settings.info;
3526 const int max_size = sizeof(cdrom_sysctl_settings.info);
3527
3528 if (!*lenp || (*ppos && !write)) {
3529 *lenp = 0;
3530 return 0;
3531 }
3532
3533 mutex_lock(&cdrom_mutex);
3534
3535 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3536
3537 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3538 goto done;
3539 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3540 goto done;
3541 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3542 goto done;
3543 if (cdrom_print_info("\nCan close tray:\t",
3544 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3545 goto done;
3546 if (cdrom_print_info("\nCan open tray:\t",
3547 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3548 goto done;
3549 if (cdrom_print_info("\nCan lock tray:\t",
3550 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3551 goto done;
3552 if (cdrom_print_info("\nCan change speed:",
3553 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3554 goto done;
3555 if (cdrom_print_info("\nCan select disk:",
3556 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3557 goto done;
3558 if (cdrom_print_info("\nCan read multisession:",
3559 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3560 goto done;
3561 if (cdrom_print_info("\nCan read MCN:\t",
3562 CDC_MCN, info, &pos, CTL_CAPABILITY))
3563 goto done;
3564 if (cdrom_print_info("\nReports media changed:",
3565 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3566 goto done;
3567 if (cdrom_print_info("\nCan play audio:\t",
3568 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3569 goto done;
3570 if (cdrom_print_info("\nCan write CD-R:\t",
3571 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3572 goto done;
3573 if (cdrom_print_info("\nCan write CD-RW:",
3574 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3575 goto done;
3576 if (cdrom_print_info("\nCan read DVD:\t",
3577 CDC_DVD, info, &pos, CTL_CAPABILITY))
3578 goto done;
3579 if (cdrom_print_info("\nCan write DVD-R:",
3580 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3581 goto done;
3582 if (cdrom_print_info("\nCan write DVD-RAM:",
3583 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3584 goto done;
3585 if (cdrom_print_info("\nCan read MRW:\t",
3586 CDC_MRW, info, &pos, CTL_CAPABILITY))
3587 goto done;
3588 if (cdrom_print_info("\nCan write MRW:\t",
3589 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3590 goto done;
3591 if (cdrom_print_info("\nCan write RAM:\t",
3592 CDC_RAM, info, &pos, CTL_CAPABILITY))
3593 goto done;
3594 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3595 goto done;
3596doit:
3597 mutex_unlock(&cdrom_mutex);
3598 return proc_dostring(ctl, write, buffer, lenp, ppos);
3599done:
3600 pr_info("info buffer too small\n");
3601 goto doit;
3602}
3603
3604/* Unfortunately, per device settings are not implemented through
3605 procfs/sysctl yet. When they are, this will naturally disappear. For now
3606 just update all drives. Later this will become the template on which
3607 new registered drives will be based. */
3608static void cdrom_update_settings(void)
3609{
3610 struct cdrom_device_info *cdi;
3611
3612 mutex_lock(&cdrom_mutex);
3613 list_for_each_entry(cdi, &cdrom_list, list) {
3614 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3615 cdi->options |= CDO_AUTO_CLOSE;
3616 else if (!autoclose)
3617 cdi->options &= ~CDO_AUTO_CLOSE;
3618 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3619 cdi->options |= CDO_AUTO_EJECT;
3620 else if (!autoeject)
3621 cdi->options &= ~CDO_AUTO_EJECT;
3622 if (lockdoor && CDROM_CAN(CDC_LOCK))
3623 cdi->options |= CDO_LOCK;
3624 else if (!lockdoor)
3625 cdi->options &= ~CDO_LOCK;
3626 if (check_media_type)
3627 cdi->options |= CDO_CHECK_TYPE;
3628 else
3629 cdi->options &= ~CDO_CHECK_TYPE;
3630 }
3631 mutex_unlock(&cdrom_mutex);
3632}
3633
3634static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3635 void *buffer, size_t *lenp, loff_t *ppos)
3636{
3637 int ret;
3638
3639 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3640
3641 if (write) {
3642
3643 /* we only care for 1 or 0. */
3644 autoclose = !!cdrom_sysctl_settings.autoclose;
3645 autoeject = !!cdrom_sysctl_settings.autoeject;
3646 debug = !!cdrom_sysctl_settings.debug;
3647 lockdoor = !!cdrom_sysctl_settings.lock;
3648 check_media_type = !!cdrom_sysctl_settings.check;
3649
3650 /* update the option flags according to the changes. we
3651 don't have per device options through sysctl yet,
3652 but we will have and then this will disappear. */
3653 cdrom_update_settings();
3654 }
3655
3656 return ret;
3657}
3658
3659/* Place files in /proc/sys/dev/cdrom */
3660static struct ctl_table cdrom_table[] = {
3661 {
3662 .procname = "info",
3663 .data = &cdrom_sysctl_settings.info,
3664 .maxlen = CDROM_STR_SIZE,
3665 .mode = 0444,
3666 .proc_handler = cdrom_sysctl_info,
3667 },
3668 {
3669 .procname = "autoclose",
3670 .data = &cdrom_sysctl_settings.autoclose,
3671 .maxlen = sizeof(int),
3672 .mode = 0644,
3673 .proc_handler = cdrom_sysctl_handler,
3674 },
3675 {
3676 .procname = "autoeject",
3677 .data = &cdrom_sysctl_settings.autoeject,
3678 .maxlen = sizeof(int),
3679 .mode = 0644,
3680 .proc_handler = cdrom_sysctl_handler,
3681 },
3682 {
3683 .procname = "debug",
3684 .data = &cdrom_sysctl_settings.debug,
3685 .maxlen = sizeof(int),
3686 .mode = 0644,
3687 .proc_handler = cdrom_sysctl_handler,
3688 },
3689 {
3690 .procname = "lock",
3691 .data = &cdrom_sysctl_settings.lock,
3692 .maxlen = sizeof(int),
3693 .mode = 0644,
3694 .proc_handler = cdrom_sysctl_handler,
3695 },
3696 {
3697 .procname = "check_media",
3698 .data = &cdrom_sysctl_settings.check,
3699 .maxlen = sizeof(int),
3700 .mode = 0644,
3701 .proc_handler = cdrom_sysctl_handler
3702 },
3703 { }
3704};
3705
3706static struct ctl_table cdrom_cdrom_table[] = {
3707 {
3708 .procname = "cdrom",
3709 .maxlen = 0,
3710 .mode = 0555,
3711 .child = cdrom_table,
3712 },
3713 { }
3714};
3715
3716/* Make sure that /proc/sys/dev is there */
3717static struct ctl_table cdrom_root_table[] = {
3718 {
3719 .procname = "dev",
3720 .maxlen = 0,
3721 .mode = 0555,
3722 .child = cdrom_cdrom_table,
3723 },
3724 { }
3725};
3726static struct ctl_table_header *cdrom_sysctl_header;
3727
3728static void cdrom_sysctl_register(void)
3729{
3730 static atomic_t initialized = ATOMIC_INIT(0);
3731
3732 if (!atomic_add_unless(&initialized, 1, 1))
3733 return;
3734
3735 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3736
3737 /* set the defaults */
3738 cdrom_sysctl_settings.autoclose = autoclose;
3739 cdrom_sysctl_settings.autoeject = autoeject;
3740 cdrom_sysctl_settings.debug = debug;
3741 cdrom_sysctl_settings.lock = lockdoor;
3742 cdrom_sysctl_settings.check = check_media_type;
3743}
3744
3745static void cdrom_sysctl_unregister(void)
3746{
3747 if (cdrom_sysctl_header)
3748 unregister_sysctl_table(cdrom_sysctl_header);
3749}
3750
3751#else /* CONFIG_SYSCTL */
3752
3753static void cdrom_sysctl_register(void)
3754{
3755}
3756
3757static void cdrom_sysctl_unregister(void)
3758{
3759}
3760
3761#endif /* CONFIG_SYSCTL */
3762
3763static int __init cdrom_init(void)
3764{
3765 cdrom_sysctl_register();
3766
3767 return 0;
3768}
3769
3770static void __exit cdrom_exit(void)
3771{
3772 pr_info("Uniform CD-ROM driver unloaded\n");
3773 cdrom_sysctl_unregister();
3774}
3775
3776module_init(cdrom_init);
3777module_exit(cdrom_exit);
3778MODULE_LICENSE("GPL");