Loading...
1/* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.rst for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 Revision History
18 ----------------------------------
19 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
20 -- Initial version by David A. van Leeuwen. I don't have a detailed
21 changelog for the 1.x series, David?
22
232.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
24 -- New maintainer! As David A. van Leeuwen has been too busy to actively
25 maintain and improve this driver, I am now carrying on the torch. If
26 you have a problem with this driver, please feel free to contact me.
27
28 -- Added (rudimentary) sysctl interface. I realize this is really weak
29 right now, and is _very_ badly implemented. It will be improved...
30
31 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
32 the Uniform CD-ROM driver via the cdrom_count_tracks function.
33 The cdrom_count_tracks function helps resolve some of the false
34 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
35 for the correct media type when mounting or playing audio from a CD.
36
37 -- Remove the calls to verify_area and only use the copy_from_user and
38 copy_to_user stuff, since these calls now provide their own memory
39 checking with the 2.1.x kernels.
40
41 -- Major update to return codes so that errors from low-level drivers
42 are passed on through (thanks to Gerd Knorr for pointing out this
43 problem).
44
45 -- Made it so if a function isn't implemented in a low-level driver,
46 ENOSYS is now returned instead of EINVAL.
47
48 -- Simplified some complex logic so that the source code is easier to read.
49
50 -- Other stuff I probably forgot to mention (lots of changes).
51
522.01 to 2.11 Dec 1997-Jan 1998
53 -- TO-DO! Write changelogs for 2.01 to 2.12.
54
552.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
56 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
57 copy_*_user does not return EFAULT on error, but instead returns the number
58 of bytes not copied. I was returning whatever non-zero stuff came back from
59 the copy_*_user functions directly, which would result in strange errors.
60
612.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
62 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
63 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
64 this out and providing a simple fix.
65 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
66 thanks to Andrea Arcangeli
67 -- Fixed it so that the /proc entry now also shows up when cdrom is
68 compiled into the kernel. Before it only worked when loaded as a module.
69
70 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in cdrom_media_changed and handling of reporting that
72 the media had changed for devices that _don't_ implement media_changed.
73 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
74 -- Made a few things more pedanticly correct.
75
762.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
77 -- New maintainers! Erik was too busy to continue the work on the driver,
78 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
79 will do their best to follow in his footsteps
80
81 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
82 -- Check if drive is capable of doing what we ask before blindly changing
83 cdi->options in various ioctl.
84 -- Added version to proc entry.
85
86 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
87 -- Fixed an error in open_for_data where we would sometimes not return
88 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
89 -- Fixed module usage count - usage was based on /proc/sys/dev
90 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
91 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
92 dev would be removed even though it was used. cdrom.c just illuminated
93 that bug.
94
95 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
97 been "rewritten" because capabilities and options aren't in sync. They
98 should be...
99 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
100 -- Added CDROM_RESET ioctl.
101 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
102 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
103 from parsing /proc/sys/dev/cdrom/info.
104
105 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
106 -- Check capability mask from low level driver when counting tracks as
107 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
108
109 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
110 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
111 CDC_CLOSE_TRAY.
112 -- proc info didn't mask against capabilities mask.
113
114 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
115 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
116 code was duplicated before. Drives that support the generic packet
117 interface are now being fed packets from here instead.
118 -- First attempt at adding support for MMC2 commands - for DVD and
119 CD-R(W) drives. Only the DVD parts are in now - the interface used is
120 the same as for the audio ioctls.
121 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
122 a change to perform device specific ioctls as well.
123 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
124 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
125 and lock.
126 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
127 CD-Rx and DVD capabilities.
128 -- Now default to checking media type.
129 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
130 doing this anyway, with the generic_packet addition.
131
132 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
133 -- Fix up the sysctl handling so that the option flags get set
134 correctly.
135 -- Fix up ioctl handling so the device specific ones actually get
136 called :).
137
138 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
139 -- Fixed volume control on SCSI drives (or others with longer audio
140 page).
141 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
142 <andrewtv@usa.net> for telling me and for having defined the various
143 DVD structures and ioctls in the first place! He designed the original
144 DVD patches for ide-cd and while I rearranged and unified them, the
145 interface is still the same.
146
147 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
148 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
149 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
150 -- Moved the CDROMREADxxx ioctls in here.
151 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
152 and exported functions.
153 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
154 to now read GPCMD_ for the new generic packet interface. All low level
155 drivers are updated as well.
156 -- Various other cleanups.
157
158 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
159 -- Fixed a couple of possible memory leaks (if an operation failed and
160 we didn't free the buffer before returning the error).
161 -- Integrated Uniform CD Changer handling from Richard Sharman
162 <rsharman@pobox.com>.
163 -- Defined CD_DVD and CD_CHANGER log levels.
164 -- Fixed the CDROMREADxxx ioctls.
165 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
166 drives supported it. We lose the index part, however.
167 -- Small modifications to accommodate opens of /dev/hdc1, required
168 for ide-cd to handle multisession discs.
169 -- Export cdrom_mode_sense and cdrom_mode_select.
170 -- init_cdrom_command() for setting up a cgc command.
171
172 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
173 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
174 impossible to send the drive data in a sensible way.
175 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
176 dvd_read_manufact.
177 -- Added setup of write mode for packet writing.
178 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
179 number of frames and split the reads in blocks of 8.
180
181 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
182 -- Added support for changing the region of DVD drives.
183 -- Added sense data to generic command.
184
185 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
186 -- Do same "read header length" trick in cdrom_get_disc_info() as
187 we do in cdrom_get_track_info() -- some drive don't obey specs and
188 fail if they can't supply the full Mt Fuji size table.
189 -- Deleted stuff related to setting up write modes. It has a different
190 home now.
191 -- Clear header length in mode_select unconditionally.
192 -- Removed the register_disk() that was added, not needed here.
193
194 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
195 -- Fix direction flag in setup_send_key and setup_report_key. This
196 gave some SCSI adapters problems.
197 -- Always return -EROFS for write opens
198 -- Convert to module_init/module_exit style init and remove some
199 of the #ifdef MODULE stuff
200 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
201 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
202 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
203 did not clear a 0 sized buffer.
204
205 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
206 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
207 that case switch block size and issue plain READ_10 again, then switch
208 back.
209
210 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
211 -- Fix volume control on CD's - old SCSI-II drives now use their own
212 code, as doing MODE6 stuff in here is really not my intention.
213 -- Use READ_DISC_INFO for more reliable end-of-disc.
214
215 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
216 -- Fix bug in getting rpc phase 2 region info.
217 -- Reinstate "correct" CDROMPLAYTRKIND
218
219 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
220 -- Use quiet bit on packet commands not known to work
221
222 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
223 -- Various fixes and lots of cleanups not listed :-)
224 -- Locking fixes
225 -- Mt Rainier support
226 -- DVD-RAM write open fixes
227
228 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
229 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
230
231 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
232 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
233
234-------------------------------------------------------------------------*/
235
236#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
237
238#define REVISION "Revision: 3.20"
239#define VERSION "Id: cdrom.c 3.20 2003/12/17"
240
241/* I use an error-log mask to give fine grain control over the type of
242 messages dumped to the system logs. The available masks include: */
243#define CD_NOTHING 0x0
244#define CD_WARNING 0x1
245#define CD_REG_UNREG 0x2
246#define CD_DO_IOCTL 0x4
247#define CD_OPEN 0x8
248#define CD_CLOSE 0x10
249#define CD_COUNT_TRACKS 0x20
250#define CD_CHANGER 0x40
251#define CD_DVD 0x80
252
253/* Define this to remove _all_ the debugging messages */
254/* #define ERRLOGMASK CD_NOTHING */
255#define ERRLOGMASK CD_WARNING
256/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
257/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
258
259#include <linux/atomic.h>
260#include <linux/module.h>
261#include <linux/fs.h>
262#include <linux/major.h>
263#include <linux/types.h>
264#include <linux/errno.h>
265#include <linux/kernel.h>
266#include <linux/mm.h>
267#include <linux/slab.h>
268#include <linux/cdrom.h>
269#include <linux/sysctl.h>
270#include <linux/proc_fs.h>
271#include <linux/blkpg.h>
272#include <linux/init.h>
273#include <linux/fcntl.h>
274#include <linux/blkdev.h>
275#include <linux/times.h>
276#include <linux/uaccess.h>
277#include <scsi/scsi_common.h>
278
279/* used to tell the module to turn on full debugging messages */
280static bool debug;
281/* default compatibility mode */
282static bool autoclose=1;
283static bool autoeject;
284static bool lockdoor = 1;
285/* will we ever get to use this... sigh. */
286static bool check_media_type;
287/* automatically restart mrw format */
288static bool mrw_format_restart = 1;
289module_param(debug, bool, 0);
290module_param(autoclose, bool, 0);
291module_param(autoeject, bool, 0);
292module_param(lockdoor, bool, 0);
293module_param(check_media_type, bool, 0);
294module_param(mrw_format_restart, bool, 0);
295
296static DEFINE_MUTEX(cdrom_mutex);
297
298static const char *mrw_format_status[] = {
299 "not mrw",
300 "bgformat inactive",
301 "bgformat active",
302 "mrw complete",
303};
304
305static const char *mrw_address_space[] = { "DMA", "GAA" };
306
307#if (ERRLOGMASK != CD_NOTHING)
308#define cd_dbg(type, fmt, ...) \
309do { \
310 if ((ERRLOGMASK & type) || debug == 1) \
311 pr_debug(fmt, ##__VA_ARGS__); \
312} while (0)
313#else
314#define cd_dbg(type, fmt, ...) \
315do { \
316 if (0 && (ERRLOGMASK & type) || debug == 1) \
317 pr_debug(fmt, ##__VA_ARGS__); \
318} while (0)
319#endif
320
321/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
322 a lot of places. This macro makes the code more clear. */
323#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
324
325/*
326 * Another popular OS uses 7 seconds as the hard timeout for default
327 * commands, so it is a good choice for us as well.
328 */
329#define CDROM_DEF_TIMEOUT (7 * HZ)
330
331/* Not-exported routines. */
332
333static void cdrom_sysctl_register(void);
334
335static LIST_HEAD(cdrom_list);
336
337static void signal_media_change(struct cdrom_device_info *cdi)
338{
339 cdi->mc_flags = 0x3; /* set media changed bits, on both queues */
340 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
341}
342
343int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
344 struct packet_command *cgc)
345{
346 if (cgc->sshdr) {
347 cgc->sshdr->sense_key = 0x05;
348 cgc->sshdr->asc = 0x20;
349 cgc->sshdr->ascq = 0x00;
350 }
351
352 cgc->stat = -EIO;
353 return -EIO;
354}
355EXPORT_SYMBOL(cdrom_dummy_generic_packet);
356
357static int cdrom_flush_cache(struct cdrom_device_info *cdi)
358{
359 struct packet_command cgc;
360
361 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
362 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
363
364 cgc.timeout = 5 * 60 * HZ;
365
366 return cdi->ops->generic_packet(cdi, &cgc);
367}
368
369/* requires CD R/RW */
370static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
371 disc_information *di)
372{
373 const struct cdrom_device_ops *cdo = cdi->ops;
374 struct packet_command cgc;
375 int ret, buflen;
376
377 /* set up command and get the disc info */
378 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
379 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
380 cgc.cmd[8] = cgc.buflen = 2;
381 cgc.quiet = 1;
382
383 ret = cdo->generic_packet(cdi, &cgc);
384 if (ret)
385 return ret;
386
387 /* not all drives have the same disc_info length, so requeue
388 * packet with the length the drive tells us it can supply
389 */
390 buflen = be16_to_cpu(di->disc_information_length) +
391 sizeof(di->disc_information_length);
392
393 if (buflen > sizeof(disc_information))
394 buflen = sizeof(disc_information);
395
396 cgc.cmd[8] = cgc.buflen = buflen;
397 ret = cdo->generic_packet(cdi, &cgc);
398 if (ret)
399 return ret;
400
401 /* return actual fill size */
402 return buflen;
403}
404
405/* This macro makes sure we don't have to check on cdrom_device_ops
406 * existence in the run-time routines below. Change_capability is a
407 * hack to have the capability flags defined const, while we can still
408 * change it here without gcc complaining at every line.
409 */
410#define ENSURE(cdo, call, bits) \
411do { \
412 if (cdo->call == NULL) \
413 WARN_ON_ONCE((cdo)->capability & (bits)); \
414} while (0)
415
416/*
417 * the first prototypes used 0x2c as the page code for the mrw mode page,
418 * subsequently this was changed to 0x03. probe the one used by this drive
419 */
420static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
421{
422 struct packet_command cgc;
423 char buffer[16];
424
425 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
426
427 cgc.timeout = HZ;
428 cgc.quiet = 1;
429
430 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
431 cdi->mrw_mode_page = MRW_MODE_PC;
432 return 0;
433 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
434 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
435 return 0;
436 }
437
438 return 1;
439}
440
441static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
442{
443 struct packet_command cgc;
444 struct mrw_feature_desc *mfd;
445 unsigned char buffer[16];
446 int ret;
447
448 *write = 0;
449
450 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
451
452 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
453 cgc.cmd[3] = CDF_MRW;
454 cgc.cmd[8] = sizeof(buffer);
455 cgc.quiet = 1;
456
457 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
458 return ret;
459
460 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
461 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
462 return 1;
463 *write = mfd->write;
464
465 if ((ret = cdrom_mrw_probe_pc(cdi))) {
466 *write = 0;
467 return ret;
468 }
469
470 return 0;
471}
472
473static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
474{
475 struct packet_command cgc;
476 unsigned char buffer[12];
477 int ret;
478
479 pr_info("%sstarting format\n", cont ? "Re" : "");
480
481 /*
482 * FmtData bit set (bit 4), format type is 1
483 */
484 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
485 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
486 cgc.cmd[1] = (1 << 4) | 1;
487
488 cgc.timeout = 5 * 60 * HZ;
489
490 /*
491 * 4 byte format list header, 8 byte format list descriptor
492 */
493 buffer[1] = 1 << 1;
494 buffer[3] = 8;
495
496 /*
497 * nr_blocks field
498 */
499 buffer[4] = 0xff;
500 buffer[5] = 0xff;
501 buffer[6] = 0xff;
502 buffer[7] = 0xff;
503
504 buffer[8] = 0x24 << 2;
505 buffer[11] = cont;
506
507 ret = cdi->ops->generic_packet(cdi, &cgc);
508 if (ret)
509 pr_info("bgformat failed\n");
510
511 return ret;
512}
513
514static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
515{
516 struct packet_command cgc;
517
518 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
519 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
520
521 /*
522 * Session = 1, Track = 0
523 */
524 cgc.cmd[1] = !!immed;
525 cgc.cmd[2] = 1 << 1;
526
527 cgc.timeout = 5 * 60 * HZ;
528
529 return cdi->ops->generic_packet(cdi, &cgc);
530}
531
532static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
533{
534 disc_information di;
535 int ret;
536
537 ret = cdrom_get_disc_info(cdi, &di);
538 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
539 return 1;
540
541 ret = 0;
542 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
543 pr_info("issuing MRW background format suspend\n");
544 ret = cdrom_mrw_bgformat_susp(cdi, 0);
545 }
546
547 if (!ret && cdi->media_written)
548 ret = cdrom_flush_cache(cdi);
549
550 return ret;
551}
552
553static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
554{
555 struct packet_command cgc;
556 struct mode_page_header *mph;
557 char buffer[16];
558 int ret, offset, size;
559
560 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
561
562 cgc.buffer = buffer;
563 cgc.buflen = sizeof(buffer);
564
565 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
566 if (ret)
567 return ret;
568
569 mph = (struct mode_page_header *)buffer;
570 offset = be16_to_cpu(mph->desc_length);
571 size = be16_to_cpu(mph->mode_data_length) + 2;
572
573 buffer[offset + 3] = space;
574 cgc.buflen = size;
575
576 ret = cdrom_mode_select(cdi, &cgc);
577 if (ret)
578 return ret;
579
580 pr_info("%s: mrw address space %s selected\n",
581 cdi->name, mrw_address_space[space]);
582 return 0;
583}
584
585int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi)
586{
587 static char banner_printed;
588 const struct cdrom_device_ops *cdo = cdi->ops;
589
590 cd_dbg(CD_OPEN, "entering register_cdrom\n");
591
592 if (cdo->open == NULL || cdo->release == NULL)
593 return -EINVAL;
594 if (!banner_printed) {
595 pr_info("Uniform CD-ROM driver " REVISION "\n");
596 banner_printed = 1;
597 cdrom_sysctl_register();
598 }
599
600 cdi->disk = disk;
601 disk->cdi = cdi;
602
603 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
604 if (cdo->check_events == NULL)
605 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
606 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
607 ENSURE(cdo, lock_door, CDC_LOCK);
608 ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
609 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
610 ENSURE(cdo, get_mcn, CDC_MCN);
611 ENSURE(cdo, reset, CDC_RESET);
612 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
613 cdi->mc_flags = 0;
614 cdi->options = CDO_USE_FFLAGS;
615 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
616
617 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
618 cdi->options |= (int) CDO_AUTO_CLOSE;
619 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
620 cdi->options |= (int) CDO_AUTO_EJECT;
621 if (lockdoor == 1)
622 cdi->options |= (int) CDO_LOCK;
623 if (check_media_type == 1)
624 cdi->options |= (int) CDO_CHECK_TYPE;
625
626 if (CDROM_CAN(CDC_MRW_W))
627 cdi->exit = cdrom_mrw_exit;
628
629 if (cdi->ops->read_cdda_bpc)
630 cdi->cdda_method = CDDA_BPC_FULL;
631 else
632 cdi->cdda_method = CDDA_OLD;
633
634 WARN_ON(!cdo->generic_packet);
635
636 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
637 mutex_lock(&cdrom_mutex);
638 list_add(&cdi->list, &cdrom_list);
639 mutex_unlock(&cdrom_mutex);
640 return 0;
641}
642EXPORT_SYMBOL(register_cdrom);
643#undef ENSURE
644
645void unregister_cdrom(struct cdrom_device_info *cdi)
646{
647 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
648
649 mutex_lock(&cdrom_mutex);
650 list_del(&cdi->list);
651 mutex_unlock(&cdrom_mutex);
652
653 if (cdi->exit)
654 cdi->exit(cdi);
655
656 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
657}
658EXPORT_SYMBOL(unregister_cdrom);
659
660int cdrom_get_media_event(struct cdrom_device_info *cdi,
661 struct media_event_desc *med)
662{
663 struct packet_command cgc;
664 unsigned char buffer[8];
665 struct event_header *eh = (struct event_header *)buffer;
666
667 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
668 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
669 cgc.cmd[1] = 1; /* IMMED */
670 cgc.cmd[4] = 1 << 4; /* media event */
671 cgc.cmd[8] = sizeof(buffer);
672 cgc.quiet = 1;
673
674 if (cdi->ops->generic_packet(cdi, &cgc))
675 return 1;
676
677 if (be16_to_cpu(eh->data_len) < sizeof(*med))
678 return 1;
679
680 if (eh->nea || eh->notification_class != 0x4)
681 return 1;
682
683 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
684 return 0;
685}
686EXPORT_SYMBOL(cdrom_get_media_event);
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 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 (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}
1203EXPORT_SYMBOL(cdrom_open);
1204
1205/* This code is similar to that in open_for_data. The routine is called
1206 whenever an audio play operation is requested.
1207*/
1208static int check_for_audio_disc(struct cdrom_device_info *cdi,
1209 const struct cdrom_device_ops *cdo)
1210{
1211 int ret;
1212 tracktype tracks;
1213 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1214 if (!(cdi->options & CDO_CHECK_TYPE))
1215 return 0;
1216 if (cdo->drive_status != NULL) {
1217 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1218 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1219 if (ret == CDS_TRAY_OPEN) {
1220 cd_dbg(CD_OPEN, "the tray is open...\n");
1221 /* can/may i close it? */
1222 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1223 cdi->options & CDO_AUTO_CLOSE) {
1224 cd_dbg(CD_OPEN, "trying to close the tray\n");
1225 ret=cdo->tray_move(cdi,0);
1226 if (ret) {
1227 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1228 /* Ignore the error from the low
1229 level driver. We don't care why it
1230 couldn't close the tray. We only care
1231 that there is no disc in the drive,
1232 since that is the _REAL_ problem here.*/
1233 return -ENOMEDIUM;
1234 }
1235 } else {
1236 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1237 return -ENOMEDIUM;
1238 }
1239 /* Ok, the door should be closed now.. Check again */
1240 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1241 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1242 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1243 return -ENOMEDIUM;
1244 }
1245 if (ret!=CDS_DISC_OK) {
1246 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1247 return -EIO;
1248 }
1249 cd_dbg(CD_OPEN, "the tray is now closed\n");
1250 }
1251 }
1252 cdrom_count_tracks(cdi, &tracks);
1253 if (tracks.error)
1254 return(tracks.error);
1255
1256 if (tracks.audio==0)
1257 return -EMEDIUMTYPE;
1258
1259 return 0;
1260}
1261
1262void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1263{
1264 const struct cdrom_device_ops *cdo = cdi->ops;
1265 int opened_for_data;
1266
1267 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1268
1269 if (cdi->use_count > 0)
1270 cdi->use_count--;
1271
1272 if (cdi->use_count == 0) {
1273 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1274 cdi->name);
1275 cdrom_dvd_rw_close_write(cdi);
1276
1277 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1278 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1279 cdo->lock_door(cdi, 0);
1280 }
1281 }
1282
1283 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1284 !(mode & FMODE_NDELAY);
1285
1286 /*
1287 * flush cache on last write release
1288 */
1289 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1290 cdrom_close_write(cdi);
1291
1292 cdo->release(cdi);
1293 if (cdi->use_count == 0) { /* last process that closes dev*/
1294 if (opened_for_data &&
1295 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1296 cdo->tray_move(cdi, 1);
1297 }
1298}
1299EXPORT_SYMBOL(cdrom_release);
1300
1301static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1302 struct cdrom_changer_info *buf)
1303{
1304 struct packet_command cgc;
1305 const struct cdrom_device_ops *cdo = cdi->ops;
1306 int length;
1307
1308 /*
1309 * Sanyo changer isn't spec compliant (doesn't use regular change
1310 * LOAD_UNLOAD command, and it doesn't implement the mech status
1311 * command below
1312 */
1313 if (cdi->sanyo_slot) {
1314 buf->hdr.nslots = 3;
1315 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1316 for (length = 0; length < 3; length++) {
1317 buf->slots[length].disc_present = 1;
1318 buf->slots[length].change = 0;
1319 }
1320 return 0;
1321 }
1322
1323 length = sizeof(struct cdrom_mechstat_header) +
1324 cdi->capacity * sizeof(struct cdrom_slot);
1325
1326 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1327 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1328 cgc.cmd[8] = (length >> 8) & 0xff;
1329 cgc.cmd[9] = length & 0xff;
1330 return cdo->generic_packet(cdi, &cgc);
1331}
1332
1333static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1334{
1335 struct cdrom_changer_info *info;
1336 int ret;
1337
1338 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1339 if (cdi->sanyo_slot)
1340 return CDS_NO_INFO;
1341
1342 info = kmalloc(sizeof(*info), GFP_KERNEL);
1343 if (!info)
1344 return -ENOMEM;
1345
1346 if ((ret = cdrom_read_mech_status(cdi, info)))
1347 goto out_free;
1348
1349 if (info->slots[slot].disc_present)
1350 ret = CDS_DISC_OK;
1351 else
1352 ret = CDS_NO_DISC;
1353
1354out_free:
1355 kfree(info);
1356 return ret;
1357}
1358
1359/* Return the number of slots for an ATAPI/SCSI cdrom,
1360 * return 1 if not a changer.
1361 */
1362int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1363{
1364 int nslots = 1;
1365 struct cdrom_changer_info *info;
1366
1367 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1368 /* cdrom_read_mech_status requires a valid value for capacity: */
1369 cdi->capacity = 0;
1370
1371 info = kmalloc(sizeof(*info), GFP_KERNEL);
1372 if (!info)
1373 return -ENOMEM;
1374
1375 if (cdrom_read_mech_status(cdi, info) == 0)
1376 nslots = info->hdr.nslots;
1377
1378 kfree(info);
1379 return nslots;
1380}
1381EXPORT_SYMBOL(cdrom_number_of_slots);
1382
1383
1384/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1385static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1386{
1387 struct packet_command cgc;
1388
1389 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1390 if (cdi->sanyo_slot && slot < 0)
1391 return 0;
1392
1393 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1394 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1395 cgc.cmd[4] = 2 + (slot >= 0);
1396 cgc.cmd[8] = slot;
1397 cgc.timeout = 60 * HZ;
1398
1399 /* The Sanyo 3 CD changer uses byte 7 of the
1400 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1401 using the GPCMD_LOAD_UNLOAD opcode. */
1402 if (cdi->sanyo_slot && -1 < slot) {
1403 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1404 cgc.cmd[7] = slot;
1405 cgc.cmd[4] = cgc.cmd[8] = 0;
1406 cdi->sanyo_slot = slot ? slot : 3;
1407 }
1408
1409 return cdi->ops->generic_packet(cdi, &cgc);
1410}
1411
1412static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1413{
1414 struct cdrom_changer_info *info;
1415 int curslot;
1416 int ret;
1417
1418 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1419 if (!CDROM_CAN(CDC_SELECT_DISC))
1420 return -EDRIVE_CANT_DO_THIS;
1421
1422 if (cdi->ops->check_events)
1423 cdi->ops->check_events(cdi, 0, slot);
1424
1425 if (slot == CDSL_NONE) {
1426 signal_media_change(cdi);
1427 return cdrom_load_unload(cdi, -1);
1428 }
1429
1430 info = kmalloc(sizeof(*info), GFP_KERNEL);
1431 if (!info)
1432 return -ENOMEM;
1433
1434 if ((ret = cdrom_read_mech_status(cdi, info))) {
1435 kfree(info);
1436 return ret;
1437 }
1438
1439 curslot = info->hdr.curslot;
1440 kfree(info);
1441
1442 if (cdi->use_count > 1 || cdi->keeplocked) {
1443 if (slot == CDSL_CURRENT) {
1444 return curslot;
1445 } else {
1446 return -EBUSY;
1447 }
1448 }
1449
1450 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1451 which is useful if it had been previously unloaded.
1452 Whether it can or not, it returns the current slot.
1453 Similarly, if slot happens to be the current one, we still
1454 try and load it. */
1455 if (slot == CDSL_CURRENT)
1456 slot = curslot;
1457
1458 /* set media changed bits on both queues */
1459 signal_media_change(cdi);
1460 if ((ret = cdrom_load_unload(cdi, slot)))
1461 return ret;
1462
1463 return slot;
1464}
1465
1466/*
1467 * As cdrom implements an extra ioctl consumer for media changed
1468 * event, it needs to buffer ->check_events() output, such that event
1469 * is not lost for both the usual VFS and ioctl paths.
1470 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1471 * path.
1472 *
1473 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1474 * called in parallel and buffering fields are accessed without any
1475 * exclusion. The original media_changed code had the same problem.
1476 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1477 * and remove this cruft altogether. It doesn't have much usefulness
1478 * at this point.
1479 */
1480static void cdrom_update_events(struct cdrom_device_info *cdi,
1481 unsigned int clearing)
1482{
1483 unsigned int events;
1484
1485 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1486 cdi->vfs_events |= events;
1487 cdi->ioctl_events |= events;
1488}
1489
1490unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1491 unsigned int clearing)
1492{
1493 unsigned int events;
1494
1495 cdrom_update_events(cdi, clearing);
1496 events = cdi->vfs_events;
1497 cdi->vfs_events = 0;
1498 return events;
1499}
1500EXPORT_SYMBOL(cdrom_check_events);
1501
1502/* We want to make media_changed accessible to the user through an
1503 * ioctl. The main problem now is that we must double-buffer the
1504 * low-level implementation, to assure that the VFS and the user both
1505 * see a medium change once.
1506 */
1507
1508static
1509int media_changed(struct cdrom_device_info *cdi, int queue)
1510{
1511 unsigned int mask = (1 << (queue & 1));
1512 int ret = !!(cdi->mc_flags & mask);
1513 bool changed;
1514
1515 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1516 return ret;
1517
1518 /* changed since last call? */
1519 BUG_ON(!queue); /* shouldn't be called from VFS path */
1520 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1521 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1522 cdi->ioctl_events = 0;
1523
1524 if (changed) {
1525 signal_media_change(cdi);
1526 ret |= 1;
1527 cdi->media_written = 0;
1528 }
1529
1530 cdi->mc_flags &= ~mask; /* clear bit */
1531 return ret;
1532}
1533
1534/* Requests to the low-level drivers will /always/ be done in the
1535 following format convention:
1536
1537 CDROM_LBA: all data-related requests.
1538 CDROM_MSF: all audio-related requests.
1539
1540 However, a low-level implementation is allowed to refuse this
1541 request, and return information in its own favorite format.
1542
1543 It doesn't make sense /at all/ to ask for a play_audio in LBA
1544 format, or ask for multi-session info in MSF format. However, for
1545 backward compatibility these format requests will be satisfied, but
1546 the requests to the low-level drivers will be sanitized in the more
1547 meaningful format indicated above.
1548 */
1549
1550static
1551void sanitize_format(union cdrom_addr *addr,
1552 u_char * curr, u_char requested)
1553{
1554 if (*curr == requested)
1555 return; /* nothing to be done! */
1556 if (requested == CDROM_LBA) {
1557 addr->lba = (int) addr->msf.frame +
1558 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1559 } else { /* CDROM_MSF */
1560 int lba = addr->lba;
1561 addr->msf.frame = lba % 75;
1562 lba /= 75;
1563 lba += 2;
1564 addr->msf.second = lba % 60;
1565 addr->msf.minute = lba / 60;
1566 }
1567 *curr = requested;
1568}
1569
1570void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1571 int type)
1572{
1573 memset(cgc, 0, sizeof(struct packet_command));
1574 if (buf)
1575 memset(buf, 0, len);
1576 cgc->buffer = (char *) buf;
1577 cgc->buflen = len;
1578 cgc->data_direction = type;
1579 cgc->timeout = CDROM_DEF_TIMEOUT;
1580}
1581EXPORT_SYMBOL(init_cdrom_command);
1582
1583/* DVD handling */
1584
1585#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1586#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1587
1588static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1589{
1590 cgc->cmd[0] = GPCMD_REPORT_KEY;
1591 cgc->cmd[10] = type | (agid << 6);
1592 switch (type) {
1593 case 0: case 8: case 5: {
1594 cgc->buflen = 8;
1595 break;
1596 }
1597 case 1: {
1598 cgc->buflen = 16;
1599 break;
1600 }
1601 case 2: case 4: {
1602 cgc->buflen = 12;
1603 break;
1604 }
1605 }
1606 cgc->cmd[9] = cgc->buflen;
1607 cgc->data_direction = CGC_DATA_READ;
1608}
1609
1610static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1611{
1612 cgc->cmd[0] = GPCMD_SEND_KEY;
1613 cgc->cmd[10] = type | (agid << 6);
1614 switch (type) {
1615 case 1: {
1616 cgc->buflen = 16;
1617 break;
1618 }
1619 case 3: {
1620 cgc->buflen = 12;
1621 break;
1622 }
1623 case 6: {
1624 cgc->buflen = 8;
1625 break;
1626 }
1627 }
1628 cgc->cmd[9] = cgc->buflen;
1629 cgc->data_direction = CGC_DATA_WRITE;
1630}
1631
1632static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1633{
1634 int ret;
1635 u_char buf[20];
1636 struct packet_command cgc;
1637 const struct cdrom_device_ops *cdo = cdi->ops;
1638 rpc_state_t rpc_state;
1639
1640 memset(buf, 0, sizeof(buf));
1641 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1642
1643 switch (ai->type) {
1644 /* LU data send */
1645 case DVD_LU_SEND_AGID:
1646 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1647 cgc.quiet = 1;
1648 setup_report_key(&cgc, ai->lsa.agid, 0);
1649
1650 if ((ret = cdo->generic_packet(cdi, &cgc)))
1651 return ret;
1652
1653 ai->lsa.agid = buf[7] >> 6;
1654 /* Returning data, let host change state */
1655 break;
1656
1657 case DVD_LU_SEND_KEY1:
1658 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1659 setup_report_key(&cgc, ai->lsk.agid, 2);
1660
1661 if ((ret = cdo->generic_packet(cdi, &cgc)))
1662 return ret;
1663
1664 copy_key(ai->lsk.key, &buf[4]);
1665 /* Returning data, let host change state */
1666 break;
1667
1668 case DVD_LU_SEND_CHALLENGE:
1669 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1670 setup_report_key(&cgc, ai->lsc.agid, 1);
1671
1672 if ((ret = cdo->generic_packet(cdi, &cgc)))
1673 return ret;
1674
1675 copy_chal(ai->lsc.chal, &buf[4]);
1676 /* Returning data, let host change state */
1677 break;
1678
1679 /* Post-auth key */
1680 case DVD_LU_SEND_TITLE_KEY:
1681 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1682 cgc.quiet = 1;
1683 setup_report_key(&cgc, ai->lstk.agid, 4);
1684 cgc.cmd[5] = ai->lstk.lba;
1685 cgc.cmd[4] = ai->lstk.lba >> 8;
1686 cgc.cmd[3] = ai->lstk.lba >> 16;
1687 cgc.cmd[2] = ai->lstk.lba >> 24;
1688
1689 if ((ret = cdo->generic_packet(cdi, &cgc)))
1690 return ret;
1691
1692 ai->lstk.cpm = (buf[4] >> 7) & 1;
1693 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1694 ai->lstk.cgms = (buf[4] >> 4) & 3;
1695 copy_key(ai->lstk.title_key, &buf[5]);
1696 /* Returning data, let host change state */
1697 break;
1698
1699 case DVD_LU_SEND_ASF:
1700 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1701 setup_report_key(&cgc, ai->lsasf.agid, 5);
1702
1703 if ((ret = cdo->generic_packet(cdi, &cgc)))
1704 return ret;
1705
1706 ai->lsasf.asf = buf[7] & 1;
1707 break;
1708
1709 /* LU data receive (LU changes state) */
1710 case DVD_HOST_SEND_CHALLENGE:
1711 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1712 setup_send_key(&cgc, ai->hsc.agid, 1);
1713 buf[1] = 0xe;
1714 copy_chal(&buf[4], ai->hsc.chal);
1715
1716 if ((ret = cdo->generic_packet(cdi, &cgc)))
1717 return ret;
1718
1719 ai->type = DVD_LU_SEND_KEY1;
1720 break;
1721
1722 case DVD_HOST_SEND_KEY2:
1723 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1724 setup_send_key(&cgc, ai->hsk.agid, 3);
1725 buf[1] = 0xa;
1726 copy_key(&buf[4], ai->hsk.key);
1727
1728 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1729 ai->type = DVD_AUTH_FAILURE;
1730 return ret;
1731 }
1732 ai->type = DVD_AUTH_ESTABLISHED;
1733 break;
1734
1735 /* Misc */
1736 case DVD_INVALIDATE_AGID:
1737 cgc.quiet = 1;
1738 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1739 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1740 if ((ret = cdo->generic_packet(cdi, &cgc)))
1741 return ret;
1742 break;
1743
1744 /* Get region settings */
1745 case DVD_LU_SEND_RPC_STATE:
1746 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1747 setup_report_key(&cgc, 0, 8);
1748 memset(&rpc_state, 0, sizeof(rpc_state_t));
1749 cgc.buffer = (char *) &rpc_state;
1750
1751 if ((ret = cdo->generic_packet(cdi, &cgc)))
1752 return ret;
1753
1754 ai->lrpcs.type = rpc_state.type_code;
1755 ai->lrpcs.vra = rpc_state.vra;
1756 ai->lrpcs.ucca = rpc_state.ucca;
1757 ai->lrpcs.region_mask = rpc_state.region_mask;
1758 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1759 break;
1760
1761 /* Set region settings */
1762 case DVD_HOST_SEND_RPC_STATE:
1763 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1764 setup_send_key(&cgc, 0, 6);
1765 buf[1] = 6;
1766 buf[4] = ai->hrpcs.pdrc;
1767
1768 if ((ret = cdo->generic_packet(cdi, &cgc)))
1769 return ret;
1770 break;
1771
1772 default:
1773 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1774 return -ENOTTY;
1775 }
1776
1777 return 0;
1778}
1779
1780static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1781 struct packet_command *cgc)
1782{
1783 unsigned char buf[21], *base;
1784 struct dvd_layer *layer;
1785 const struct cdrom_device_ops *cdo = cdi->ops;
1786 int ret, layer_num = s->physical.layer_num;
1787
1788 if (layer_num >= DVD_LAYERS)
1789 return -EINVAL;
1790
1791 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1792 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1793 cgc->cmd[6] = layer_num;
1794 cgc->cmd[7] = s->type;
1795 cgc->cmd[9] = cgc->buflen & 0xff;
1796
1797 /*
1798 * refrain from reporting errors on non-existing layers (mainly)
1799 */
1800 cgc->quiet = 1;
1801
1802 ret = cdo->generic_packet(cdi, cgc);
1803 if (ret)
1804 return ret;
1805
1806 base = &buf[4];
1807 layer = &s->physical.layer[layer_num];
1808
1809 /*
1810 * place the data... really ugly, but at least we won't have to
1811 * worry about endianess in userspace.
1812 */
1813 memset(layer, 0, sizeof(*layer));
1814 layer->book_version = base[0] & 0xf;
1815 layer->book_type = base[0] >> 4;
1816 layer->min_rate = base[1] & 0xf;
1817 layer->disc_size = base[1] >> 4;
1818 layer->layer_type = base[2] & 0xf;
1819 layer->track_path = (base[2] >> 4) & 1;
1820 layer->nlayers = (base[2] >> 5) & 3;
1821 layer->track_density = base[3] & 0xf;
1822 layer->linear_density = base[3] >> 4;
1823 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1824 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1825 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1826 layer->bca = base[16] >> 7;
1827
1828 return 0;
1829}
1830
1831static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1832 struct packet_command *cgc)
1833{
1834 int ret;
1835 u_char buf[8];
1836 const struct cdrom_device_ops *cdo = cdi->ops;
1837
1838 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1839 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1840 cgc->cmd[6] = s->copyright.layer_num;
1841 cgc->cmd[7] = s->type;
1842 cgc->cmd[8] = cgc->buflen >> 8;
1843 cgc->cmd[9] = cgc->buflen & 0xff;
1844
1845 ret = cdo->generic_packet(cdi, cgc);
1846 if (ret)
1847 return ret;
1848
1849 s->copyright.cpst = buf[4];
1850 s->copyright.rmi = buf[5];
1851
1852 return 0;
1853}
1854
1855static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1856 struct packet_command *cgc)
1857{
1858 int ret, size;
1859 u_char *buf;
1860 const struct cdrom_device_ops *cdo = cdi->ops;
1861
1862 size = sizeof(s->disckey.value) + 4;
1863
1864 buf = kmalloc(size, GFP_KERNEL);
1865 if (!buf)
1866 return -ENOMEM;
1867
1868 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1869 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1870 cgc->cmd[7] = s->type;
1871 cgc->cmd[8] = size >> 8;
1872 cgc->cmd[9] = size & 0xff;
1873 cgc->cmd[10] = s->disckey.agid << 6;
1874
1875 ret = cdo->generic_packet(cdi, cgc);
1876 if (!ret)
1877 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1878
1879 kfree(buf);
1880 return ret;
1881}
1882
1883static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1884 struct packet_command *cgc)
1885{
1886 int ret, size = 4 + 188;
1887 u_char *buf;
1888 const struct cdrom_device_ops *cdo = cdi->ops;
1889
1890 buf = kmalloc(size, GFP_KERNEL);
1891 if (!buf)
1892 return -ENOMEM;
1893
1894 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1895 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1896 cgc->cmd[7] = s->type;
1897 cgc->cmd[9] = cgc->buflen & 0xff;
1898
1899 ret = cdo->generic_packet(cdi, cgc);
1900 if (ret)
1901 goto out;
1902
1903 s->bca.len = buf[0] << 8 | buf[1];
1904 if (s->bca.len < 12 || s->bca.len > 188) {
1905 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1906 s->bca.len);
1907 ret = -EIO;
1908 goto out;
1909 }
1910 memcpy(s->bca.value, &buf[4], s->bca.len);
1911 ret = 0;
1912out:
1913 kfree(buf);
1914 return ret;
1915}
1916
1917static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1918 struct packet_command *cgc)
1919{
1920 int ret = 0, size;
1921 u_char *buf;
1922 const struct cdrom_device_ops *cdo = cdi->ops;
1923
1924 size = sizeof(s->manufact.value) + 4;
1925
1926 buf = kmalloc(size, GFP_KERNEL);
1927 if (!buf)
1928 return -ENOMEM;
1929
1930 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1931 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1932 cgc->cmd[7] = s->type;
1933 cgc->cmd[8] = size >> 8;
1934 cgc->cmd[9] = size & 0xff;
1935
1936 ret = cdo->generic_packet(cdi, cgc);
1937 if (ret)
1938 goto out;
1939
1940 s->manufact.len = buf[0] << 8 | buf[1];
1941 if (s->manufact.len < 0) {
1942 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1943 s->manufact.len);
1944 ret = -EIO;
1945 } else {
1946 if (s->manufact.len > 2048) {
1947 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1948 s->manufact.len);
1949 s->manufact.len = 2048;
1950 }
1951 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1952 }
1953
1954out:
1955 kfree(buf);
1956 return ret;
1957}
1958
1959static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1960 struct packet_command *cgc)
1961{
1962 switch (s->type) {
1963 case DVD_STRUCT_PHYSICAL:
1964 return dvd_read_physical(cdi, s, cgc);
1965
1966 case DVD_STRUCT_COPYRIGHT:
1967 return dvd_read_copyright(cdi, s, cgc);
1968
1969 case DVD_STRUCT_DISCKEY:
1970 return dvd_read_disckey(cdi, s, cgc);
1971
1972 case DVD_STRUCT_BCA:
1973 return dvd_read_bca(cdi, s, cgc);
1974
1975 case DVD_STRUCT_MANUFACT:
1976 return dvd_read_manufact(cdi, s, cgc);
1977
1978 default:
1979 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1980 s->type);
1981 return -EINVAL;
1982 }
1983}
1984
1985int cdrom_mode_sense(struct cdrom_device_info *cdi,
1986 struct packet_command *cgc,
1987 int page_code, int page_control)
1988{
1989 const struct cdrom_device_ops *cdo = cdi->ops;
1990
1991 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1992
1993 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1994 cgc->cmd[2] = page_code | (page_control << 6);
1995 cgc->cmd[7] = cgc->buflen >> 8;
1996 cgc->cmd[8] = cgc->buflen & 0xff;
1997 cgc->data_direction = CGC_DATA_READ;
1998 return cdo->generic_packet(cdi, cgc);
1999}
2000EXPORT_SYMBOL(cdrom_mode_sense);
2001
2002int cdrom_mode_select(struct cdrom_device_info *cdi,
2003 struct packet_command *cgc)
2004{
2005 const struct cdrom_device_ops *cdo = cdi->ops;
2006
2007 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2008 memset(cgc->buffer, 0, 2);
2009 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2010 cgc->cmd[1] = 0x10; /* PF */
2011 cgc->cmd[7] = cgc->buflen >> 8;
2012 cgc->cmd[8] = cgc->buflen & 0xff;
2013 cgc->data_direction = CGC_DATA_WRITE;
2014 return cdo->generic_packet(cdi, cgc);
2015}
2016EXPORT_SYMBOL(cdrom_mode_select);
2017
2018static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2019 struct cdrom_subchnl *subchnl, int mcn)
2020{
2021 const struct cdrom_device_ops *cdo = cdi->ops;
2022 struct packet_command cgc;
2023 char buffer[32];
2024 int ret;
2025
2026 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2027 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2028 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2029 cgc.cmd[2] = 0x40; /* request subQ data */
2030 cgc.cmd[3] = mcn ? 2 : 1;
2031 cgc.cmd[8] = 16;
2032
2033 if ((ret = cdo->generic_packet(cdi, &cgc)))
2034 return ret;
2035
2036 subchnl->cdsc_audiostatus = cgc.buffer[1];
2037 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2038 subchnl->cdsc_trk = cgc.buffer[6];
2039 subchnl->cdsc_ind = cgc.buffer[7];
2040
2041 if (subchnl->cdsc_format == CDROM_LBA) {
2042 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2043 (cgc.buffer[9] << 16) |
2044 (cgc.buffer[10] << 8) |
2045 (cgc.buffer[11]));
2046 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2047 (cgc.buffer[13] << 16) |
2048 (cgc.buffer[14] << 8) |
2049 (cgc.buffer[15]));
2050 } else {
2051 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2052 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2053 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2054 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2055 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2056 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2057 }
2058
2059 return 0;
2060}
2061
2062/*
2063 * Specific READ_10 interface
2064 */
2065static int cdrom_read_cd(struct cdrom_device_info *cdi,
2066 struct packet_command *cgc, int lba,
2067 int blocksize, int nblocks)
2068{
2069 const struct cdrom_device_ops *cdo = cdi->ops;
2070
2071 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2072 cgc->cmd[0] = GPCMD_READ_10;
2073 cgc->cmd[2] = (lba >> 24) & 0xff;
2074 cgc->cmd[3] = (lba >> 16) & 0xff;
2075 cgc->cmd[4] = (lba >> 8) & 0xff;
2076 cgc->cmd[5] = lba & 0xff;
2077 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2078 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2079 cgc->cmd[8] = nblocks & 0xff;
2080 cgc->buflen = blocksize * nblocks;
2081 return cdo->generic_packet(cdi, cgc);
2082}
2083
2084/* very generic interface for reading the various types of blocks */
2085static int cdrom_read_block(struct cdrom_device_info *cdi,
2086 struct packet_command *cgc,
2087 int lba, int nblocks, int format, int blksize)
2088{
2089 const struct cdrom_device_ops *cdo = cdi->ops;
2090
2091 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2092 cgc->cmd[0] = GPCMD_READ_CD;
2093 /* expected sector size - cdda,mode1,etc. */
2094 cgc->cmd[1] = format << 2;
2095 /* starting address */
2096 cgc->cmd[2] = (lba >> 24) & 0xff;
2097 cgc->cmd[3] = (lba >> 16) & 0xff;
2098 cgc->cmd[4] = (lba >> 8) & 0xff;
2099 cgc->cmd[5] = lba & 0xff;
2100 /* number of blocks */
2101 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2102 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2103 cgc->cmd[8] = nblocks & 0xff;
2104 cgc->buflen = blksize * nblocks;
2105
2106 /* set the header info returned */
2107 switch (blksize) {
2108 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2109 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2110 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2111 default : cgc->cmd[9] = 0x10;
2112 }
2113
2114 return cdo->generic_packet(cdi, cgc);
2115}
2116
2117static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2118 int lba, int nframes)
2119{
2120 struct packet_command cgc;
2121 int ret = 0;
2122 int nr;
2123
2124 cdi->last_sense = 0;
2125
2126 memset(&cgc, 0, sizeof(cgc));
2127
2128 /*
2129 * start with will ra.nframes size, back down if alloc fails
2130 */
2131 nr = nframes;
2132 do {
2133 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL);
2134 if (cgc.buffer)
2135 break;
2136
2137 nr >>= 1;
2138 } while (nr);
2139
2140 if (!nr)
2141 return -ENOMEM;
2142
2143 cgc.data_direction = CGC_DATA_READ;
2144 while (nframes > 0) {
2145 if (nr > nframes)
2146 nr = nframes;
2147
2148 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2149 if (ret)
2150 break;
2151 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2152 ret = -EFAULT;
2153 break;
2154 }
2155 ubuf += CD_FRAMESIZE_RAW * nr;
2156 nframes -= nr;
2157 lba += nr;
2158 }
2159 kfree(cgc.buffer);
2160 return ret;
2161}
2162
2163static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2164 int lba, int nframes)
2165{
2166 int max_frames = (queue_max_sectors(cdi->disk->queue) << 9) /
2167 CD_FRAMESIZE_RAW;
2168 int nr, ret = 0;
2169
2170 cdi->last_sense = 0;
2171
2172 while (nframes) {
2173 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2174 nr = 1;
2175 else
2176 nr = min(nframes, max_frames);
2177
2178 ret = cdi->ops->read_cdda_bpc(cdi, ubuf, lba, nr,
2179 &cdi->last_sense);
2180 if (ret)
2181 break;
2182
2183 nframes -= nr;
2184 lba += nr;
2185 ubuf += (nr * CD_FRAMESIZE_RAW);
2186 }
2187
2188 return ret;
2189}
2190
2191static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2192 int lba, int nframes)
2193{
2194 int ret;
2195
2196 if (cdi->cdda_method == CDDA_OLD)
2197 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2198
2199retry:
2200 /*
2201 * for anything else than success and io error, we need to retry
2202 */
2203 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2204 if (!ret || ret != -EIO)
2205 return ret;
2206
2207 /*
2208 * I've seen drives get sense 4/8/3 udma crc errors on multi
2209 * frame dma, so drop to single frame dma if we need to
2210 */
2211 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2212 pr_info("dropping to single frame dma\n");
2213 cdi->cdda_method = CDDA_BPC_SINGLE;
2214 goto retry;
2215 }
2216
2217 /*
2218 * so we have an io error of some sort with multi frame dma. if the
2219 * condition wasn't a hardware error
2220 * problems, not for any error
2221 */
2222 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2223 return ret;
2224
2225 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2226 cdi->cdda_method = CDDA_OLD;
2227 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2228}
2229
2230int cdrom_multisession(struct cdrom_device_info *cdi,
2231 struct cdrom_multisession *info)
2232{
2233 u8 requested_format;
2234 int ret;
2235
2236 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2237 return -ENOSYS;
2238
2239 requested_format = info->addr_format;
2240 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2241 return -EINVAL;
2242 info->addr_format = CDROM_LBA;
2243
2244 ret = cdi->ops->get_last_session(cdi, info);
2245 if (!ret)
2246 sanitize_format(&info->addr, &info->addr_format,
2247 requested_format);
2248 return ret;
2249}
2250EXPORT_SYMBOL_GPL(cdrom_multisession);
2251
2252static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2253 void __user *argp)
2254{
2255 struct cdrom_multisession info;
2256 int ret;
2257
2258 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2259
2260 if (copy_from_user(&info, argp, sizeof(info)))
2261 return -EFAULT;
2262 ret = cdrom_multisession(cdi, &info);
2263 if (ret)
2264 return ret;
2265 if (copy_to_user(argp, &info, sizeof(info)))
2266 return -EFAULT;
2267
2268 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2269 return ret;
2270}
2271
2272static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2273{
2274 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2275
2276 if (!CDROM_CAN(CDC_OPEN_TRAY))
2277 return -ENOSYS;
2278 if (cdi->use_count != 1 || cdi->keeplocked)
2279 return -EBUSY;
2280 if (CDROM_CAN(CDC_LOCK)) {
2281 int ret = cdi->ops->lock_door(cdi, 0);
2282 if (ret)
2283 return ret;
2284 }
2285
2286 return cdi->ops->tray_move(cdi, 1);
2287}
2288
2289static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2290{
2291 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2292
2293 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2294 return -ENOSYS;
2295 return cdi->ops->tray_move(cdi, 0);
2296}
2297
2298static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2299 unsigned long arg)
2300{
2301 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2302
2303 if (!CDROM_CAN(CDC_OPEN_TRAY))
2304 return -ENOSYS;
2305 if (cdi->keeplocked)
2306 return -EBUSY;
2307
2308 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2309 if (arg)
2310 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2311 return 0;
2312}
2313
2314static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2315 unsigned long arg)
2316{
2317 struct cdrom_changer_info *info;
2318 int ret;
2319
2320 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2321
2322 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2323 return -ENOSYS;
2324
2325 /* cannot select disc or select current disc */
2326 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2327 return media_changed(cdi, 1);
2328
2329 if (arg >= cdi->capacity)
2330 return -EINVAL;
2331
2332 info = kmalloc(sizeof(*info), GFP_KERNEL);
2333 if (!info)
2334 return -ENOMEM;
2335
2336 ret = cdrom_read_mech_status(cdi, info);
2337 if (!ret)
2338 ret = info->slots[arg].change;
2339 kfree(info);
2340 return ret;
2341}
2342
2343/*
2344 * Media change detection with timing information.
2345 *
2346 * arg is a pointer to a cdrom_timed_media_change_info struct.
2347 * arg->last_media_change may be set by calling code to signal
2348 * the timestamp (in ms) of the last known media change (by the caller).
2349 * Upon successful return, ioctl call will set arg->last_media_change
2350 * to the latest media change timestamp known by the kernel/driver
2351 * and set arg->has_changed to 1 if that timestamp is more recent
2352 * than the timestamp set by the caller.
2353 */
2354static int cdrom_ioctl_timed_media_change(struct cdrom_device_info *cdi,
2355 unsigned long arg)
2356{
2357 int ret;
2358 struct cdrom_timed_media_change_info __user *info;
2359 struct cdrom_timed_media_change_info tmp_info;
2360
2361 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2362 return -ENOSYS;
2363
2364 info = (struct cdrom_timed_media_change_info __user *)arg;
2365 cd_dbg(CD_DO_IOCTL, "entering CDROM_TIMED_MEDIA_CHANGE\n");
2366
2367 ret = cdrom_ioctl_media_changed(cdi, CDSL_CURRENT);
2368 if (ret < 0)
2369 return ret;
2370
2371 if (copy_from_user(&tmp_info, info, sizeof(tmp_info)) != 0)
2372 return -EFAULT;
2373
2374 tmp_info.media_flags = 0;
2375 if (tmp_info.last_media_change - cdi->last_media_change_ms < 0)
2376 tmp_info.media_flags |= MEDIA_CHANGED_FLAG;
2377
2378 tmp_info.last_media_change = cdi->last_media_change_ms;
2379
2380 if (copy_to_user(info, &tmp_info, sizeof(*info)) != 0)
2381 return -EFAULT;
2382
2383 return 0;
2384}
2385
2386static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2387 unsigned long arg)
2388{
2389 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2390
2391 /*
2392 * Options need to be in sync with capability.
2393 * Too late for that, so we have to check each one separately.
2394 */
2395 switch (arg) {
2396 case CDO_USE_FFLAGS:
2397 case CDO_CHECK_TYPE:
2398 break;
2399 case CDO_LOCK:
2400 if (!CDROM_CAN(CDC_LOCK))
2401 return -ENOSYS;
2402 break;
2403 case 0:
2404 return cdi->options;
2405 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2406 default:
2407 if (!CDROM_CAN(arg))
2408 return -ENOSYS;
2409 }
2410 cdi->options |= (int) arg;
2411 return cdi->options;
2412}
2413
2414static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2415 unsigned long arg)
2416{
2417 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2418
2419 cdi->options &= ~(int) arg;
2420 return cdi->options;
2421}
2422
2423static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2424 unsigned long arg)
2425{
2426 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2427
2428 if (!CDROM_CAN(CDC_SELECT_SPEED))
2429 return -ENOSYS;
2430 return cdi->ops->select_speed(cdi, arg);
2431}
2432
2433static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2434 unsigned long arg)
2435{
2436 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2437
2438 if (!CDROM_CAN(CDC_SELECT_DISC))
2439 return -ENOSYS;
2440
2441 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2442 if (arg >= cdi->capacity)
2443 return -EINVAL;
2444 }
2445
2446 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2447 return cdrom_select_disc(cdi, arg);
2448}
2449
2450static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2451 struct block_device *bdev)
2452{
2453 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2454
2455 if (!capable(CAP_SYS_ADMIN))
2456 return -EACCES;
2457 if (!CDROM_CAN(CDC_RESET))
2458 return -ENOSYS;
2459 invalidate_bdev(bdev);
2460 return cdi->ops->reset(cdi);
2461}
2462
2463static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2464 unsigned long arg)
2465{
2466 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2467
2468 if (!CDROM_CAN(CDC_LOCK))
2469 return -EDRIVE_CANT_DO_THIS;
2470
2471 cdi->keeplocked = arg ? 1 : 0;
2472
2473 /*
2474 * Don't unlock the door on multiple opens by default, but allow
2475 * root to do so.
2476 */
2477 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2478 return -EBUSY;
2479 return cdi->ops->lock_door(cdi, arg);
2480}
2481
2482static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2483 unsigned long arg)
2484{
2485 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2486
2487 if (!capable(CAP_SYS_ADMIN))
2488 return -EACCES;
2489 debug = arg ? 1 : 0;
2490 return debug;
2491}
2492
2493static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2494{
2495 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2496 return (cdi->ops->capability & ~cdi->mask);
2497}
2498
2499/*
2500 * The following function is implemented, although very few audio
2501 * discs give Universal Product Code information, which should just be
2502 * the Medium Catalog Number on the box. Note, that the way the code
2503 * is written on the CD is /not/ uniform across all discs!
2504 */
2505static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2506 void __user *argp)
2507{
2508 struct cdrom_mcn mcn;
2509 int ret;
2510
2511 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2512
2513 if (!(cdi->ops->capability & CDC_MCN))
2514 return -ENOSYS;
2515 ret = cdi->ops->get_mcn(cdi, &mcn);
2516 if (ret)
2517 return ret;
2518
2519 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2520 return -EFAULT;
2521 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2522 return 0;
2523}
2524
2525static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2526 unsigned long arg)
2527{
2528 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2529
2530 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2531 return -ENOSYS;
2532 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2533 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2534 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2535 if (arg >= cdi->capacity)
2536 return -EINVAL;
2537 return cdrom_slot_status(cdi, arg);
2538}
2539
2540/*
2541 * Ok, this is where problems start. The current interface for the
2542 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2543 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2544 * is often the case, it is also very common for CDs to have some tracks
2545 * with data, and some tracks with audio. Just because I feel like it,
2546 * I declare the following to be the best way to cope. If the CD has ANY
2547 * data tracks on it, it will be returned as a data CD. If it has any XA
2548 * tracks, I will return it as that. Now I could simplify this interface
2549 * by combining these returns with the above, but this more clearly
2550 * demonstrates the problem with the current interface. Too bad this
2551 * wasn't designed to use bitmasks... -Erik
2552 *
2553 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2554 * User level programmers might feel the ioctl is not very useful.
2555 * ---david
2556 */
2557static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2558{
2559 tracktype tracks;
2560
2561 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2562
2563 cdrom_count_tracks(cdi, &tracks);
2564 if (tracks.error)
2565 return tracks.error;
2566
2567 /* Policy mode on */
2568 if (tracks.audio > 0) {
2569 if (!tracks.data && !tracks.cdi && !tracks.xa)
2570 return CDS_AUDIO;
2571 else
2572 return CDS_MIXED;
2573 }
2574
2575 if (tracks.cdi > 0)
2576 return CDS_XA_2_2;
2577 if (tracks.xa > 0)
2578 return CDS_XA_2_1;
2579 if (tracks.data > 0)
2580 return CDS_DATA_1;
2581 /* Policy mode off */
2582
2583 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2584 return CDS_NO_INFO;
2585}
2586
2587static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2588{
2589 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2590 return cdi->capacity;
2591}
2592
2593static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2594 void __user *argp)
2595{
2596 struct cdrom_subchnl q;
2597 u8 requested, back;
2598 int ret;
2599
2600 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2601
2602 if (copy_from_user(&q, argp, sizeof(q)))
2603 return -EFAULT;
2604
2605 requested = q.cdsc_format;
2606 if (requested != CDROM_MSF && requested != CDROM_LBA)
2607 return -EINVAL;
2608 q.cdsc_format = CDROM_MSF;
2609
2610 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2611 if (ret)
2612 return ret;
2613
2614 back = q.cdsc_format; /* local copy */
2615 sanitize_format(&q.cdsc_absaddr, &back, requested);
2616 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2617
2618 if (copy_to_user(argp, &q, sizeof(q)))
2619 return -EFAULT;
2620 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2621 return 0;
2622}
2623
2624static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2625 void __user *argp)
2626{
2627 struct cdrom_tochdr header;
2628 int ret;
2629
2630 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2631
2632 if (copy_from_user(&header, argp, sizeof(header)))
2633 return -EFAULT;
2634
2635 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2636 if (ret)
2637 return ret;
2638
2639 if (copy_to_user(argp, &header, sizeof(header)))
2640 return -EFAULT;
2641 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2642 return 0;
2643}
2644
2645int cdrom_read_tocentry(struct cdrom_device_info *cdi,
2646 struct cdrom_tocentry *entry)
2647{
2648 u8 requested_format = entry->cdte_format;
2649 int ret;
2650
2651 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2652 return -EINVAL;
2653
2654 /* make interface to low-level uniform */
2655 entry->cdte_format = CDROM_MSF;
2656 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, entry);
2657 if (!ret)
2658 sanitize_format(&entry->cdte_addr, &entry->cdte_format,
2659 requested_format);
2660 return ret;
2661}
2662EXPORT_SYMBOL_GPL(cdrom_read_tocentry);
2663
2664static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2665 void __user *argp)
2666{
2667 struct cdrom_tocentry entry;
2668 int ret;
2669
2670 if (copy_from_user(&entry, argp, sizeof(entry)))
2671 return -EFAULT;
2672 ret = cdrom_read_tocentry(cdi, &entry);
2673 if (!ret && copy_to_user(argp, &entry, sizeof(entry)))
2674 return -EFAULT;
2675 return ret;
2676}
2677
2678static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2679 void __user *argp)
2680{
2681 struct cdrom_msf msf;
2682
2683 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2684
2685 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2686 return -ENOSYS;
2687 if (copy_from_user(&msf, argp, sizeof(msf)))
2688 return -EFAULT;
2689 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2690}
2691
2692static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2693 void __user *argp)
2694{
2695 struct cdrom_ti ti;
2696 int ret;
2697
2698 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2699
2700 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2701 return -ENOSYS;
2702 if (copy_from_user(&ti, argp, sizeof(ti)))
2703 return -EFAULT;
2704
2705 ret = check_for_audio_disc(cdi, cdi->ops);
2706 if (ret)
2707 return ret;
2708 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2709}
2710static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2711 void __user *argp)
2712{
2713 struct cdrom_volctrl volume;
2714
2715 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2716
2717 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2718 return -ENOSYS;
2719 if (copy_from_user(&volume, argp, sizeof(volume)))
2720 return -EFAULT;
2721 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2722}
2723
2724static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2725 void __user *argp)
2726{
2727 struct cdrom_volctrl volume;
2728 int ret;
2729
2730 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2731
2732 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2733 return -ENOSYS;
2734
2735 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2736 if (ret)
2737 return ret;
2738
2739 if (copy_to_user(argp, &volume, sizeof(volume)))
2740 return -EFAULT;
2741 return 0;
2742}
2743
2744static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2745 unsigned int cmd)
2746{
2747 int ret;
2748
2749 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2750
2751 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2752 return -ENOSYS;
2753 ret = check_for_audio_disc(cdi, cdi->ops);
2754 if (ret)
2755 return ret;
2756 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2757}
2758
2759/*
2760 * Required when we need to use READ_10 to issue other than 2048 block
2761 * reads
2762 */
2763static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2764{
2765 const struct cdrom_device_ops *cdo = cdi->ops;
2766 struct packet_command cgc;
2767 struct modesel_head mh;
2768
2769 memset(&mh, 0, sizeof(mh));
2770 mh.block_desc_length = 0x08;
2771 mh.block_length_med = (size >> 8) & 0xff;
2772 mh.block_length_lo = size & 0xff;
2773
2774 memset(&cgc, 0, sizeof(cgc));
2775 cgc.cmd[0] = 0x15;
2776 cgc.cmd[1] = 1 << 4;
2777 cgc.cmd[4] = 12;
2778 cgc.buflen = sizeof(mh);
2779 cgc.buffer = (char *) &mh;
2780 cgc.data_direction = CGC_DATA_WRITE;
2781 mh.block_desc_length = 0x08;
2782 mh.block_length_med = (size >> 8) & 0xff;
2783 mh.block_length_lo = size & 0xff;
2784
2785 return cdo->generic_packet(cdi, &cgc);
2786}
2787
2788static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2789 __u16 track, __u8 type, track_information *ti)
2790{
2791 const struct cdrom_device_ops *cdo = cdi->ops;
2792 struct packet_command cgc;
2793 int ret, buflen;
2794
2795 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2796 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2797 cgc.cmd[1] = type & 3;
2798 cgc.cmd[4] = (track & 0xff00) >> 8;
2799 cgc.cmd[5] = track & 0xff;
2800 cgc.cmd[8] = 8;
2801 cgc.quiet = 1;
2802
2803 ret = cdo->generic_packet(cdi, &cgc);
2804 if (ret)
2805 return ret;
2806
2807 buflen = be16_to_cpu(ti->track_information_length) +
2808 sizeof(ti->track_information_length);
2809
2810 if (buflen > sizeof(track_information))
2811 buflen = sizeof(track_information);
2812
2813 cgc.cmd[8] = cgc.buflen = buflen;
2814 ret = cdo->generic_packet(cdi, &cgc);
2815 if (ret)
2816 return ret;
2817
2818 /* return actual fill size */
2819 return buflen;
2820}
2821
2822/* return the last written block on the CD-R media. this is for the udf
2823 file system. */
2824int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2825{
2826 struct cdrom_tocentry toc;
2827 disc_information di;
2828 track_information ti;
2829 __u32 last_track;
2830 int ret = -1, ti_size;
2831
2832 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2833 goto use_toc;
2834
2835 ret = cdrom_get_disc_info(cdi, &di);
2836 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2837 + sizeof(di.last_track_lsb)))
2838 goto use_toc;
2839
2840 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2841 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2842 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2843 if (ti_size < (int)offsetof(typeof(ti), track_start))
2844 goto use_toc;
2845
2846 /* if this track is blank, try the previous. */
2847 if (ti.blank) {
2848 if (last_track == 1)
2849 goto use_toc;
2850 last_track--;
2851 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2852 }
2853
2854 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2855 + sizeof(ti.track_size)))
2856 goto use_toc;
2857
2858 /* if last recorded field is valid, return it. */
2859 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2860 + sizeof(ti.last_rec_address))) {
2861 *last_written = be32_to_cpu(ti.last_rec_address);
2862 } else {
2863 /* make it up instead */
2864 *last_written = be32_to_cpu(ti.track_start) +
2865 be32_to_cpu(ti.track_size);
2866 if (ti.free_blocks)
2867 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2868 }
2869 return 0;
2870
2871 /* this is where we end up if the drive either can't do a
2872 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2873 it doesn't give enough information or fails. then we return
2874 the toc contents. */
2875use_toc:
2876 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2877 return -ENOSYS;
2878
2879 toc.cdte_format = CDROM_MSF;
2880 toc.cdte_track = CDROM_LEADOUT;
2881 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2882 return ret;
2883 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2884 *last_written = toc.cdte_addr.lba;
2885 return 0;
2886}
2887EXPORT_SYMBOL(cdrom_get_last_written);
2888
2889/* return the next writable block. also for udf file system. */
2890static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2891 long *next_writable)
2892{
2893 disc_information di;
2894 track_information ti;
2895 __u16 last_track;
2896 int ret, ti_size;
2897
2898 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2899 goto use_last_written;
2900
2901 ret = cdrom_get_disc_info(cdi, &di);
2902 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2903 + sizeof(di.last_track_lsb))
2904 goto use_last_written;
2905
2906 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2907 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2908 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2909 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2910 goto use_last_written;
2911
2912 /* if this track is blank, try the previous. */
2913 if (ti.blank) {
2914 if (last_track == 1)
2915 goto use_last_written;
2916 last_track--;
2917 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2918 if (ti_size < 0)
2919 goto use_last_written;
2920 }
2921
2922 /* if next recordable address field is valid, use it. */
2923 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2924 + sizeof(ti.next_writable)) {
2925 *next_writable = be32_to_cpu(ti.next_writable);
2926 return 0;
2927 }
2928
2929use_last_written:
2930 ret = cdrom_get_last_written(cdi, next_writable);
2931 if (ret) {
2932 *next_writable = 0;
2933 return ret;
2934 } else {
2935 *next_writable += 7;
2936 return 0;
2937 }
2938}
2939
2940static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2941 void __user *arg,
2942 struct packet_command *cgc,
2943 int cmd)
2944{
2945 struct scsi_sense_hdr sshdr;
2946 struct cdrom_msf msf;
2947 int blocksize = 0, format = 0, lba;
2948 int ret;
2949
2950 switch (cmd) {
2951 case CDROMREADRAW:
2952 blocksize = CD_FRAMESIZE_RAW;
2953 break;
2954 case CDROMREADMODE1:
2955 blocksize = CD_FRAMESIZE;
2956 format = 2;
2957 break;
2958 case CDROMREADMODE2:
2959 blocksize = CD_FRAMESIZE_RAW0;
2960 break;
2961 }
2962 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2963 return -EFAULT;
2964 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2965 /* FIXME: we need upper bound checking, too!! */
2966 if (lba < 0)
2967 return -EINVAL;
2968
2969 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2970 if (cgc->buffer == NULL)
2971 return -ENOMEM;
2972
2973 memset(&sshdr, 0, sizeof(sshdr));
2974 cgc->sshdr = &sshdr;
2975 cgc->data_direction = CGC_DATA_READ;
2976 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2977 if (ret && sshdr.sense_key == 0x05 &&
2978 sshdr.asc == 0x20 &&
2979 sshdr.ascq == 0x00) {
2980 /*
2981 * SCSI-II devices are not required to support
2982 * READ_CD, so let's try switching block size
2983 */
2984 if (blocksize != CD_FRAMESIZE) {
2985 ret = cdrom_switch_blocksize(cdi, blocksize);
2986 if (ret)
2987 goto out;
2988 }
2989 cgc->sshdr = NULL;
2990 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2991 if (blocksize != CD_FRAMESIZE)
2992 ret |= cdrom_switch_blocksize(cdi, CD_FRAMESIZE);
2993 }
2994 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2995 ret = -EFAULT;
2996out:
2997 kfree(cgc->buffer);
2998 return ret;
2999}
3000
3001static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3002 void __user *arg)
3003{
3004 struct cdrom_read_audio ra;
3005 int lba;
3006
3007#ifdef CONFIG_COMPAT
3008 if (in_compat_syscall()) {
3009 struct compat_cdrom_read_audio {
3010 union cdrom_addr addr;
3011 u8 addr_format;
3012 compat_int_t nframes;
3013 compat_caddr_t buf;
3014 } ra32;
3015
3016 if (copy_from_user(&ra32, arg, sizeof(ra32)))
3017 return -EFAULT;
3018
3019 ra = (struct cdrom_read_audio) {
3020 .addr = ra32.addr,
3021 .addr_format = ra32.addr_format,
3022 .nframes = ra32.nframes,
3023 .buf = compat_ptr(ra32.buf),
3024 };
3025 } else
3026#endif
3027 {
3028 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3029 sizeof(ra)))
3030 return -EFAULT;
3031 }
3032
3033 if (ra.addr_format == CDROM_MSF)
3034 lba = msf_to_lba(ra.addr.msf.minute,
3035 ra.addr.msf.second,
3036 ra.addr.msf.frame);
3037 else if (ra.addr_format == CDROM_LBA)
3038 lba = ra.addr.lba;
3039 else
3040 return -EINVAL;
3041
3042 /* FIXME: we need upper bound checking, too!! */
3043 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3044 return -EINVAL;
3045
3046 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3047}
3048
3049static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3050 void __user *arg)
3051{
3052 int ret;
3053 struct cdrom_subchnl q;
3054 u_char requested, back;
3055 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3056 return -EFAULT;
3057 requested = q.cdsc_format;
3058 if (!((requested == CDROM_MSF) ||
3059 (requested == CDROM_LBA)))
3060 return -EINVAL;
3061
3062 ret = cdrom_read_subchannel(cdi, &q, 0);
3063 if (ret)
3064 return ret;
3065 back = q.cdsc_format; /* local copy */
3066 sanitize_format(&q.cdsc_absaddr, &back, requested);
3067 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3068 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3069 return -EFAULT;
3070 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3071 return 0;
3072}
3073
3074static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3075 void __user *arg,
3076 struct packet_command *cgc)
3077{
3078 const struct cdrom_device_ops *cdo = cdi->ops;
3079 struct cdrom_msf msf;
3080 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3081 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3082 return -EFAULT;
3083 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3084 cgc->cmd[3] = msf.cdmsf_min0;
3085 cgc->cmd[4] = msf.cdmsf_sec0;
3086 cgc->cmd[5] = msf.cdmsf_frame0;
3087 cgc->cmd[6] = msf.cdmsf_min1;
3088 cgc->cmd[7] = msf.cdmsf_sec1;
3089 cgc->cmd[8] = msf.cdmsf_frame1;
3090 cgc->data_direction = CGC_DATA_NONE;
3091 return cdo->generic_packet(cdi, cgc);
3092}
3093
3094static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3095 void __user *arg,
3096 struct packet_command *cgc)
3097{
3098 const struct cdrom_device_ops *cdo = cdi->ops;
3099 struct cdrom_blk blk;
3100 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3101 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3102 return -EFAULT;
3103 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3104 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3105 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3106 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3107 cgc->cmd[5] = blk.from & 0xff;
3108 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3109 cgc->cmd[8] = blk.len & 0xff;
3110 cgc->data_direction = CGC_DATA_NONE;
3111 return cdo->generic_packet(cdi, cgc);
3112}
3113
3114static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3115 void __user *arg,
3116 struct packet_command *cgc,
3117 unsigned int cmd)
3118{
3119 struct cdrom_volctrl volctrl;
3120 unsigned char buffer[32];
3121 char mask[sizeof(buffer)];
3122 unsigned short offset;
3123 int ret;
3124
3125 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3126
3127 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3128 sizeof(volctrl)))
3129 return -EFAULT;
3130
3131 cgc->buffer = buffer;
3132 cgc->buflen = 24;
3133 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3134 if (ret)
3135 return ret;
3136
3137 /* originally the code depended on buffer[1] to determine
3138 how much data is available for transfer. buffer[1] is
3139 unfortunately ambigious and the only reliable way seem
3140 to be to simply skip over the block descriptor... */
3141 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3142
3143 if (offset + 16 > sizeof(buffer))
3144 return -E2BIG;
3145
3146 if (offset + 16 > cgc->buflen) {
3147 cgc->buflen = offset + 16;
3148 ret = cdrom_mode_sense(cdi, cgc,
3149 GPMODE_AUDIO_CTL_PAGE, 0);
3150 if (ret)
3151 return ret;
3152 }
3153
3154 /* sanity check */
3155 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3156 buffer[offset + 1] < 14)
3157 return -EINVAL;
3158
3159 /* now we have the current volume settings. if it was only
3160 a CDROMVOLREAD, return these values */
3161 if (cmd == CDROMVOLREAD) {
3162 volctrl.channel0 = buffer[offset+9];
3163 volctrl.channel1 = buffer[offset+11];
3164 volctrl.channel2 = buffer[offset+13];
3165 volctrl.channel3 = buffer[offset+15];
3166 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3167 sizeof(volctrl)))
3168 return -EFAULT;
3169 return 0;
3170 }
3171
3172 /* get the volume mask */
3173 cgc->buffer = mask;
3174 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3175 if (ret)
3176 return ret;
3177
3178 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3179 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3180 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3181 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3182
3183 /* set volume */
3184 cgc->buffer = buffer + offset - 8;
3185 memset(cgc->buffer, 0, 8);
3186 return cdrom_mode_select(cdi, cgc);
3187}
3188
3189static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3190 struct packet_command *cgc,
3191 int cmd)
3192{
3193 const struct cdrom_device_ops *cdo = cdi->ops;
3194 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3195 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3196 cgc->cmd[1] = 1;
3197 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3198 cgc->data_direction = CGC_DATA_NONE;
3199 return cdo->generic_packet(cdi, cgc);
3200}
3201
3202static noinline int mmc_ioctl_cdrom_pause_resume(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 CDROMPAUSE/CDROMRESUME\n");
3208 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3209 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3210 cgc->data_direction = CGC_DATA_NONE;
3211 return cdo->generic_packet(cdi, cgc);
3212}
3213
3214static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3215 void __user *arg,
3216 struct packet_command *cgc)
3217{
3218 int ret;
3219 dvd_struct *s;
3220 int size = sizeof(dvd_struct);
3221
3222 if (!CDROM_CAN(CDC_DVD))
3223 return -ENOSYS;
3224
3225 s = memdup_user(arg, size);
3226 if (IS_ERR(s))
3227 return PTR_ERR(s);
3228
3229 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3230
3231 ret = dvd_read_struct(cdi, s, cgc);
3232 if (ret)
3233 goto out;
3234
3235 if (copy_to_user(arg, s, size))
3236 ret = -EFAULT;
3237out:
3238 kfree(s);
3239 return ret;
3240}
3241
3242static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3243 void __user *arg)
3244{
3245 int ret;
3246 dvd_authinfo ai;
3247 if (!CDROM_CAN(CDC_DVD))
3248 return -ENOSYS;
3249 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3250 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3251 return -EFAULT;
3252 ret = dvd_do_auth(cdi, &ai);
3253 if (ret)
3254 return ret;
3255 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3256 return -EFAULT;
3257 return 0;
3258}
3259
3260static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3261 void __user *arg)
3262{
3263 int ret;
3264 long next = 0;
3265 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3266 ret = cdrom_get_next_writable(cdi, &next);
3267 if (ret)
3268 return ret;
3269 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3270 return -EFAULT;
3271 return 0;
3272}
3273
3274static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3275 void __user *arg)
3276{
3277 int ret;
3278 long last = 0;
3279 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3280 ret = cdrom_get_last_written(cdi, &last);
3281 if (ret)
3282 return ret;
3283 if (in_compat_syscall())
3284 return put_user(last, (__s32 __user *)arg);
3285
3286 return put_user(last, (long __user *)arg);
3287}
3288
3289static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3290 unsigned long arg)
3291{
3292 struct packet_command cgc;
3293 void __user *userptr = (void __user *)arg;
3294
3295 memset(&cgc, 0, sizeof(cgc));
3296
3297 /* build a unified command and queue it through
3298 cdo->generic_packet() */
3299 switch (cmd) {
3300 case CDROMREADRAW:
3301 case CDROMREADMODE1:
3302 case CDROMREADMODE2:
3303 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3304 case CDROMREADAUDIO:
3305 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3306 case CDROMSUBCHNL:
3307 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3308 case CDROMPLAYMSF:
3309 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3310 case CDROMPLAYBLK:
3311 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3312 case CDROMVOLCTRL:
3313 case CDROMVOLREAD:
3314 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3315 case CDROMSTART:
3316 case CDROMSTOP:
3317 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3318 case CDROMPAUSE:
3319 case CDROMRESUME:
3320 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3321 case DVD_READ_STRUCT:
3322 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3323 case DVD_AUTH:
3324 return mmc_ioctl_dvd_auth(cdi, userptr);
3325 case CDROM_NEXT_WRITABLE:
3326 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3327 case CDROM_LAST_WRITTEN:
3328 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3329 }
3330
3331 return -ENOTTY;
3332}
3333
3334/*
3335 * Just about every imaginable ioctl is supported in the Uniform layer
3336 * these days.
3337 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3338 */
3339int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3340 fmode_t mode, unsigned int cmd, unsigned long arg)
3341{
3342 void __user *argp = (void __user *)arg;
3343 int ret;
3344
3345 switch (cmd) {
3346 case CDROMMULTISESSION:
3347 return cdrom_ioctl_multisession(cdi, argp);
3348 case CDROMEJECT:
3349 return cdrom_ioctl_eject(cdi);
3350 case CDROMCLOSETRAY:
3351 return cdrom_ioctl_closetray(cdi);
3352 case CDROMEJECT_SW:
3353 return cdrom_ioctl_eject_sw(cdi, arg);
3354 case CDROM_MEDIA_CHANGED:
3355 return cdrom_ioctl_media_changed(cdi, arg);
3356 case CDROM_TIMED_MEDIA_CHANGE:
3357 return cdrom_ioctl_timed_media_change(cdi, arg);
3358 case CDROM_SET_OPTIONS:
3359 return cdrom_ioctl_set_options(cdi, arg);
3360 case CDROM_CLEAR_OPTIONS:
3361 return cdrom_ioctl_clear_options(cdi, arg);
3362 case CDROM_SELECT_SPEED:
3363 return cdrom_ioctl_select_speed(cdi, arg);
3364 case CDROM_SELECT_DISC:
3365 return cdrom_ioctl_select_disc(cdi, arg);
3366 case CDROMRESET:
3367 return cdrom_ioctl_reset(cdi, bdev);
3368 case CDROM_LOCKDOOR:
3369 return cdrom_ioctl_lock_door(cdi, arg);
3370 case CDROM_DEBUG:
3371 return cdrom_ioctl_debug(cdi, arg);
3372 case CDROM_GET_CAPABILITY:
3373 return cdrom_ioctl_get_capability(cdi);
3374 case CDROM_GET_MCN:
3375 return cdrom_ioctl_get_mcn(cdi, argp);
3376 case CDROM_DRIVE_STATUS:
3377 return cdrom_ioctl_drive_status(cdi, arg);
3378 case CDROM_DISC_STATUS:
3379 return cdrom_ioctl_disc_status(cdi);
3380 case CDROM_CHANGER_NSLOTS:
3381 return cdrom_ioctl_changer_nslots(cdi);
3382 }
3383
3384 /*
3385 * Use the ioctls that are implemented through the generic_packet()
3386 * interface. this may look at bit funny, but if -ENOTTY is
3387 * returned that particular ioctl is not implemented and we
3388 * let it go through the device specific ones.
3389 */
3390 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3391 ret = mmc_ioctl(cdi, cmd, arg);
3392 if (ret != -ENOTTY)
3393 return ret;
3394 }
3395
3396 /*
3397 * Note: most of the cd_dbg() calls are commented out here,
3398 * because they fill up the sys log when CD players poll
3399 * the drive.
3400 */
3401 switch (cmd) {
3402 case CDROMSUBCHNL:
3403 return cdrom_ioctl_get_subchnl(cdi, argp);
3404 case CDROMREADTOCHDR:
3405 return cdrom_ioctl_read_tochdr(cdi, argp);
3406 case CDROMREADTOCENTRY:
3407 return cdrom_ioctl_read_tocentry(cdi, argp);
3408 case CDROMPLAYMSF:
3409 return cdrom_ioctl_play_msf(cdi, argp);
3410 case CDROMPLAYTRKIND:
3411 return cdrom_ioctl_play_trkind(cdi, argp);
3412 case CDROMVOLCTRL:
3413 return cdrom_ioctl_volctrl(cdi, argp);
3414 case CDROMVOLREAD:
3415 return cdrom_ioctl_volread(cdi, argp);
3416 case CDROMSTART:
3417 case CDROMSTOP:
3418 case CDROMPAUSE:
3419 case CDROMRESUME:
3420 return cdrom_ioctl_audioctl(cdi, cmd);
3421 }
3422
3423 return -ENOSYS;
3424}
3425EXPORT_SYMBOL(cdrom_ioctl);
3426
3427#ifdef CONFIG_SYSCTL
3428
3429#define CDROM_STR_SIZE 1000
3430
3431static struct cdrom_sysctl_settings {
3432 char info[CDROM_STR_SIZE]; /* general info */
3433 int autoclose; /* close tray upon mount, etc */
3434 int autoeject; /* eject on umount */
3435 int debug; /* turn on debugging messages */
3436 int lock; /* lock the door on device open */
3437 int check; /* check media type */
3438} cdrom_sysctl_settings;
3439
3440enum cdrom_print_option {
3441 CTL_NAME,
3442 CTL_SPEED,
3443 CTL_SLOTS,
3444 CTL_CAPABILITY
3445};
3446
3447static int cdrom_print_info(const char *header, int val, char *info,
3448 int *pos, enum cdrom_print_option option)
3449{
3450 const int max_size = sizeof(cdrom_sysctl_settings.info);
3451 struct cdrom_device_info *cdi;
3452 int ret;
3453
3454 ret = scnprintf(info + *pos, max_size - *pos, header);
3455 if (!ret)
3456 return 1;
3457
3458 *pos += ret;
3459
3460 list_for_each_entry(cdi, &cdrom_list, list) {
3461 switch (option) {
3462 case CTL_NAME:
3463 ret = scnprintf(info + *pos, max_size - *pos,
3464 "\t%s", cdi->name);
3465 break;
3466 case CTL_SPEED:
3467 ret = scnprintf(info + *pos, max_size - *pos,
3468 "\t%d", cdi->speed);
3469 break;
3470 case CTL_SLOTS:
3471 ret = scnprintf(info + *pos, max_size - *pos,
3472 "\t%d", cdi->capacity);
3473 break;
3474 case CTL_CAPABILITY:
3475 ret = scnprintf(info + *pos, max_size - *pos,
3476 "\t%d", CDROM_CAN(val) != 0);
3477 break;
3478 default:
3479 pr_info("invalid option%d\n", option);
3480 return 1;
3481 }
3482 if (!ret)
3483 return 1;
3484 *pos += ret;
3485 }
3486
3487 return 0;
3488}
3489
3490static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3491 void *buffer, size_t *lenp, loff_t *ppos)
3492{
3493 int pos;
3494 char *info = cdrom_sysctl_settings.info;
3495 const int max_size = sizeof(cdrom_sysctl_settings.info);
3496
3497 if (!*lenp || (*ppos && !write)) {
3498 *lenp = 0;
3499 return 0;
3500 }
3501
3502 mutex_lock(&cdrom_mutex);
3503
3504 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3505
3506 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3507 goto done;
3508 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3509 goto done;
3510 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3511 goto done;
3512 if (cdrom_print_info("\nCan close tray:\t",
3513 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3514 goto done;
3515 if (cdrom_print_info("\nCan open tray:\t",
3516 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3517 goto done;
3518 if (cdrom_print_info("\nCan lock tray:\t",
3519 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3520 goto done;
3521 if (cdrom_print_info("\nCan change speed:",
3522 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3523 goto done;
3524 if (cdrom_print_info("\nCan select disk:",
3525 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3526 goto done;
3527 if (cdrom_print_info("\nCan read multisession:",
3528 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3529 goto done;
3530 if (cdrom_print_info("\nCan read MCN:\t",
3531 CDC_MCN, info, &pos, CTL_CAPABILITY))
3532 goto done;
3533 if (cdrom_print_info("\nReports media changed:",
3534 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3535 goto done;
3536 if (cdrom_print_info("\nCan play audio:\t",
3537 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3538 goto done;
3539 if (cdrom_print_info("\nCan write CD-R:\t",
3540 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3541 goto done;
3542 if (cdrom_print_info("\nCan write CD-RW:",
3543 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3544 goto done;
3545 if (cdrom_print_info("\nCan read DVD:\t",
3546 CDC_DVD, info, &pos, CTL_CAPABILITY))
3547 goto done;
3548 if (cdrom_print_info("\nCan write DVD-R:",
3549 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3550 goto done;
3551 if (cdrom_print_info("\nCan write DVD-RAM:",
3552 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3553 goto done;
3554 if (cdrom_print_info("\nCan read MRW:\t",
3555 CDC_MRW, info, &pos, CTL_CAPABILITY))
3556 goto done;
3557 if (cdrom_print_info("\nCan write MRW:\t",
3558 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3559 goto done;
3560 if (cdrom_print_info("\nCan write RAM:\t",
3561 CDC_RAM, info, &pos, CTL_CAPABILITY))
3562 goto done;
3563 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3564 goto done;
3565doit:
3566 mutex_unlock(&cdrom_mutex);
3567 return proc_dostring(ctl, write, buffer, lenp, ppos);
3568done:
3569 pr_info("info buffer too small\n");
3570 goto doit;
3571}
3572
3573/* Unfortunately, per device settings are not implemented through
3574 procfs/sysctl yet. When they are, this will naturally disappear. For now
3575 just update all drives. Later this will become the template on which
3576 new registered drives will be based. */
3577static void cdrom_update_settings(void)
3578{
3579 struct cdrom_device_info *cdi;
3580
3581 mutex_lock(&cdrom_mutex);
3582 list_for_each_entry(cdi, &cdrom_list, list) {
3583 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3584 cdi->options |= CDO_AUTO_CLOSE;
3585 else if (!autoclose)
3586 cdi->options &= ~CDO_AUTO_CLOSE;
3587 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3588 cdi->options |= CDO_AUTO_EJECT;
3589 else if (!autoeject)
3590 cdi->options &= ~CDO_AUTO_EJECT;
3591 if (lockdoor && CDROM_CAN(CDC_LOCK))
3592 cdi->options |= CDO_LOCK;
3593 else if (!lockdoor)
3594 cdi->options &= ~CDO_LOCK;
3595 if (check_media_type)
3596 cdi->options |= CDO_CHECK_TYPE;
3597 else
3598 cdi->options &= ~CDO_CHECK_TYPE;
3599 }
3600 mutex_unlock(&cdrom_mutex);
3601}
3602
3603static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3604 void *buffer, size_t *lenp, loff_t *ppos)
3605{
3606 int ret;
3607
3608 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3609
3610 if (write) {
3611
3612 /* we only care for 1 or 0. */
3613 autoclose = !!cdrom_sysctl_settings.autoclose;
3614 autoeject = !!cdrom_sysctl_settings.autoeject;
3615 debug = !!cdrom_sysctl_settings.debug;
3616 lockdoor = !!cdrom_sysctl_settings.lock;
3617 check_media_type = !!cdrom_sysctl_settings.check;
3618
3619 /* update the option flags according to the changes. we
3620 don't have per device options through sysctl yet,
3621 but we will have and then this will disappear. */
3622 cdrom_update_settings();
3623 }
3624
3625 return ret;
3626}
3627
3628/* Place files in /proc/sys/dev/cdrom */
3629static struct ctl_table cdrom_table[] = {
3630 {
3631 .procname = "info",
3632 .data = &cdrom_sysctl_settings.info,
3633 .maxlen = CDROM_STR_SIZE,
3634 .mode = 0444,
3635 .proc_handler = cdrom_sysctl_info,
3636 },
3637 {
3638 .procname = "autoclose",
3639 .data = &cdrom_sysctl_settings.autoclose,
3640 .maxlen = sizeof(int),
3641 .mode = 0644,
3642 .proc_handler = cdrom_sysctl_handler,
3643 },
3644 {
3645 .procname = "autoeject",
3646 .data = &cdrom_sysctl_settings.autoeject,
3647 .maxlen = sizeof(int),
3648 .mode = 0644,
3649 .proc_handler = cdrom_sysctl_handler,
3650 },
3651 {
3652 .procname = "debug",
3653 .data = &cdrom_sysctl_settings.debug,
3654 .maxlen = sizeof(int),
3655 .mode = 0644,
3656 .proc_handler = cdrom_sysctl_handler,
3657 },
3658 {
3659 .procname = "lock",
3660 .data = &cdrom_sysctl_settings.lock,
3661 .maxlen = sizeof(int),
3662 .mode = 0644,
3663 .proc_handler = cdrom_sysctl_handler,
3664 },
3665 {
3666 .procname = "check_media",
3667 .data = &cdrom_sysctl_settings.check,
3668 .maxlen = sizeof(int),
3669 .mode = 0644,
3670 .proc_handler = cdrom_sysctl_handler
3671 },
3672 { }
3673};
3674static struct ctl_table_header *cdrom_sysctl_header;
3675
3676static void cdrom_sysctl_register(void)
3677{
3678 static atomic_t initialized = ATOMIC_INIT(0);
3679
3680 if (!atomic_add_unless(&initialized, 1, 1))
3681 return;
3682
3683 cdrom_sysctl_header = register_sysctl("dev/cdrom", cdrom_table);
3684
3685 /* set the defaults */
3686 cdrom_sysctl_settings.autoclose = autoclose;
3687 cdrom_sysctl_settings.autoeject = autoeject;
3688 cdrom_sysctl_settings.debug = debug;
3689 cdrom_sysctl_settings.lock = lockdoor;
3690 cdrom_sysctl_settings.check = check_media_type;
3691}
3692
3693static void cdrom_sysctl_unregister(void)
3694{
3695 if (cdrom_sysctl_header)
3696 unregister_sysctl_table(cdrom_sysctl_header);
3697}
3698
3699#else /* CONFIG_SYSCTL */
3700
3701static void cdrom_sysctl_register(void)
3702{
3703}
3704
3705static void cdrom_sysctl_unregister(void)
3706{
3707}
3708
3709#endif /* CONFIG_SYSCTL */
3710
3711static int __init cdrom_init(void)
3712{
3713 cdrom_sysctl_register();
3714
3715 return 0;
3716}
3717
3718static void __exit cdrom_exit(void)
3719{
3720 pr_info("Uniform CD-ROM driver unloaded\n");
3721 cdrom_sysctl_unregister();
3722}
3723
3724module_init(cdrom_init);
3725module_exit(cdrom_exit);
3726MODULE_LICENSE("GPL");
1/* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.rst for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 Revision History
18 ----------------------------------
19 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
20 -- Initial version by David A. van Leeuwen. I don't have a detailed
21 changelog for the 1.x series, David?
22
232.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
24 -- New maintainer! As David A. van Leeuwen has been too busy to actively
25 maintain and improve this driver, I am now carrying on the torch. If
26 you have a problem with this driver, please feel free to contact me.
27
28 -- Added (rudimentary) sysctl interface. I realize this is really weak
29 right now, and is _very_ badly implemented. It will be improved...
30
31 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
32 the Uniform CD-ROM driver via the cdrom_count_tracks function.
33 The cdrom_count_tracks function helps resolve some of the false
34 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
35 for the correct media type when mounting or playing audio from a CD.
36
37 -- Remove the calls to verify_area and only use the copy_from_user and
38 copy_to_user stuff, since these calls now provide their own memory
39 checking with the 2.1.x kernels.
40
41 -- Major update to return codes so that errors from low-level drivers
42 are passed on through (thanks to Gerd Knorr for pointing out this
43 problem).
44
45 -- Made it so if a function isn't implemented in a low-level driver,
46 ENOSYS is now returned instead of EINVAL.
47
48 -- Simplified some complex logic so that the source code is easier to read.
49
50 -- Other stuff I probably forgot to mention (lots of changes).
51
522.01 to 2.11 Dec 1997-Jan 1998
53 -- TO-DO! Write changelogs for 2.01 to 2.12.
54
552.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
56 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
57 copy_*_user does not return EFAULT on error, but instead returns the number
58 of bytes not copied. I was returning whatever non-zero stuff came back from
59 the copy_*_user functions directly, which would result in strange errors.
60
612.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
62 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
63 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
64 this out and providing a simple fix.
65 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
66 thanks to Andrea Arcangeli
67 -- Fixed it so that the /proc entry now also shows up when cdrom is
68 compiled into the kernel. Before it only worked when loaded as a module.
69
70 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in cdrom_media_changed and handling of reporting that
72 the media had changed for devices that _don't_ implement media_changed.
73 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
74 -- Made a few things more pedanticly correct.
75
762.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
77 -- New maintainers! Erik was too busy to continue the work on the driver,
78 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
79 will do their best to follow in his footsteps
80
81 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
82 -- Check if drive is capable of doing what we ask before blindly changing
83 cdi->options in various ioctl.
84 -- Added version to proc entry.
85
86 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
87 -- Fixed an error in open_for_data where we would sometimes not return
88 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
89 -- Fixed module usage count - usage was based on /proc/sys/dev
90 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
91 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
92 dev would be removed even though it was used. cdrom.c just illuminated
93 that bug.
94
95 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
97 been "rewritten" because capabilities and options aren't in sync. They
98 should be...
99 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
100 -- Added CDROM_RESET ioctl.
101 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
102 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
103 from parsing /proc/sys/dev/cdrom/info.
104
105 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
106 -- Check capability mask from low level driver when counting tracks as
107 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
108
109 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
110 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
111 CDC_CLOSE_TRAY.
112 -- proc info didn't mask against capabilities mask.
113
114 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
115 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
116 code was duplicated before. Drives that support the generic packet
117 interface are now being fed packets from here instead.
118 -- First attempt at adding support for MMC2 commands - for DVD and
119 CD-R(W) drives. Only the DVD parts are in now - the interface used is
120 the same as for the audio ioctls.
121 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
122 a change to perform device specific ioctls as well.
123 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
124 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
125 and lock.
126 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
127 CD-Rx and DVD capabilities.
128 -- Now default to checking media type.
129 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
130 doing this anyway, with the generic_packet addition.
131
132 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
133 -- Fix up the sysctl handling so that the option flags get set
134 correctly.
135 -- Fix up ioctl handling so the device specific ones actually get
136 called :).
137
138 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
139 -- Fixed volume control on SCSI drives (or others with longer audio
140 page).
141 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
142 <andrewtv@usa.net> for telling me and for having defined the various
143 DVD structures and ioctls in the first place! He designed the original
144 DVD patches for ide-cd and while I rearranged and unified them, the
145 interface is still the same.
146
147 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
148 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
149 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
150 -- Moved the CDROMREADxxx ioctls in here.
151 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
152 and exported functions.
153 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
154 to now read GPCMD_ for the new generic packet interface. All low level
155 drivers are updated as well.
156 -- Various other cleanups.
157
158 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
159 -- Fixed a couple of possible memory leaks (if an operation failed and
160 we didn't free the buffer before returning the error).
161 -- Integrated Uniform CD Changer handling from Richard Sharman
162 <rsharman@pobox.com>.
163 -- Defined CD_DVD and CD_CHANGER log levels.
164 -- Fixed the CDROMREADxxx ioctls.
165 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
166 drives supported it. We lose the index part, however.
167 -- Small modifications to accommodate opens of /dev/hdc1, required
168 for ide-cd to handle multisession discs.
169 -- Export cdrom_mode_sense and cdrom_mode_select.
170 -- init_cdrom_command() for setting up a cgc command.
171
172 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
173 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
174 impossible to send the drive data in a sensible way.
175 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
176 dvd_read_manufact.
177 -- Added setup of write mode for packet writing.
178 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
179 number of frames and split the reads in blocks of 8.
180
181 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
182 -- Added support for changing the region of DVD drives.
183 -- Added sense data to generic command.
184
185 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
186 -- Do same "read header length" trick in cdrom_get_disc_info() as
187 we do in cdrom_get_track_info() -- some drive don't obey specs and
188 fail if they can't supply the full Mt Fuji size table.
189 -- Deleted stuff related to setting up write modes. It has a different
190 home now.
191 -- Clear header length in mode_select unconditionally.
192 -- Removed the register_disk() that was added, not needed here.
193
194 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
195 -- Fix direction flag in setup_send_key and setup_report_key. This
196 gave some SCSI adapters problems.
197 -- Always return -EROFS for write opens
198 -- Convert to module_init/module_exit style init and remove some
199 of the #ifdef MODULE stuff
200 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
201 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
202 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
203 did not clear a 0 sized buffer.
204
205 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
206 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
207 that case switch block size and issue plain READ_10 again, then switch
208 back.
209
210 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
211 -- Fix volume control on CD's - old SCSI-II drives now use their own
212 code, as doing MODE6 stuff in here is really not my intention.
213 -- Use READ_DISC_INFO for more reliable end-of-disc.
214
215 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
216 -- Fix bug in getting rpc phase 2 region info.
217 -- Reinstate "correct" CDROMPLAYTRKIND
218
219 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
220 -- Use quiet bit on packet commands not known to work
221
222 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
223 -- Various fixes and lots of cleanups not listed :-)
224 -- Locking fixes
225 -- Mt Rainier support
226 -- DVD-RAM write open fixes
227
228 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
229 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
230
231 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
232 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
233
234-------------------------------------------------------------------------*/
235
236#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
237
238#define REVISION "Revision: 3.20"
239#define VERSION "Id: cdrom.c 3.20 2003/12/17"
240
241/* I use an error-log mask to give fine grain control over the type of
242 messages dumped to the system logs. The available masks include: */
243#define CD_NOTHING 0x0
244#define CD_WARNING 0x1
245#define CD_REG_UNREG 0x2
246#define CD_DO_IOCTL 0x4
247#define CD_OPEN 0x8
248#define CD_CLOSE 0x10
249#define CD_COUNT_TRACKS 0x20
250#define CD_CHANGER 0x40
251#define CD_DVD 0x80
252
253/* Define this to remove _all_ the debugging messages */
254/* #define ERRLOGMASK CD_NOTHING */
255#define ERRLOGMASK CD_WARNING
256/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
257/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
258
259#include <linux/atomic.h>
260#include <linux/module.h>
261#include <linux/fs.h>
262#include <linux/major.h>
263#include <linux/types.h>
264#include <linux/errno.h>
265#include <linux/kernel.h>
266#include <linux/mm.h>
267#include <linux/nospec.h>
268#include <linux/slab.h>
269#include <linux/cdrom.h>
270#include <linux/sysctl.h>
271#include <linux/proc_fs.h>
272#include <linux/blkpg.h>
273#include <linux/init.h>
274#include <linux/fcntl.h>
275#include <linux/blkdev.h>
276#include <linux/times.h>
277#include <linux/uaccess.h>
278#include <scsi/scsi_common.h>
279
280/* used to tell the module to turn on full debugging messages */
281static bool debug;
282/* default compatibility mode */
283static bool autoclose=1;
284static bool autoeject;
285static bool lockdoor = 1;
286/* will we ever get to use this... sigh. */
287static bool check_media_type;
288/* automatically restart mrw format */
289static bool mrw_format_restart = 1;
290module_param(debug, bool, 0);
291module_param(autoclose, bool, 0);
292module_param(autoeject, bool, 0);
293module_param(lockdoor, bool, 0);
294module_param(check_media_type, bool, 0);
295module_param(mrw_format_restart, bool, 0);
296
297static DEFINE_MUTEX(cdrom_mutex);
298
299static const char *mrw_format_status[] = {
300 "not mrw",
301 "bgformat inactive",
302 "bgformat active",
303 "mrw complete",
304};
305
306static const char *mrw_address_space[] = { "DMA", "GAA" };
307
308#if (ERRLOGMASK != CD_NOTHING)
309#define cd_dbg(type, fmt, ...) \
310do { \
311 if ((ERRLOGMASK & type) || debug == 1) \
312 pr_debug(fmt, ##__VA_ARGS__); \
313} while (0)
314#else
315#define cd_dbg(type, fmt, ...) \
316do { \
317 if (0 && (ERRLOGMASK & type) || debug == 1) \
318 pr_debug(fmt, ##__VA_ARGS__); \
319} while (0)
320#endif
321
322/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
323 a lot of places. This macro makes the code more clear. */
324#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
325
326/*
327 * Another popular OS uses 7 seconds as the hard timeout for default
328 * commands, so it is a good choice for us as well.
329 */
330#define CDROM_DEF_TIMEOUT (7 * HZ)
331
332/* Not-exported routines. */
333
334static void cdrom_sysctl_register(void);
335
336static LIST_HEAD(cdrom_list);
337
338static void signal_media_change(struct cdrom_device_info *cdi)
339{
340 cdi->mc_flags = 0x3; /* set media changed bits, on both queues */
341 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
342}
343
344int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
345 struct packet_command *cgc)
346{
347 if (cgc->sshdr) {
348 cgc->sshdr->sense_key = 0x05;
349 cgc->sshdr->asc = 0x20;
350 cgc->sshdr->ascq = 0x00;
351 }
352
353 cgc->stat = -EIO;
354 return -EIO;
355}
356EXPORT_SYMBOL(cdrom_dummy_generic_packet);
357
358static int cdrom_flush_cache(struct cdrom_device_info *cdi)
359{
360 struct packet_command cgc;
361
362 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
363 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
364
365 cgc.timeout = 5 * 60 * HZ;
366
367 return cdi->ops->generic_packet(cdi, &cgc);
368}
369
370/* requires CD R/RW */
371static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
372 disc_information *di)
373{
374 const struct cdrom_device_ops *cdo = cdi->ops;
375 struct packet_command cgc;
376 int ret, buflen;
377
378 /* set up command and get the disc info */
379 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
380 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
381 cgc.cmd[8] = cgc.buflen = 2;
382 cgc.quiet = 1;
383
384 ret = cdo->generic_packet(cdi, &cgc);
385 if (ret)
386 return ret;
387
388 /* not all drives have the same disc_info length, so requeue
389 * packet with the length the drive tells us it can supply
390 */
391 buflen = be16_to_cpu(di->disc_information_length) +
392 sizeof(di->disc_information_length);
393
394 if (buflen > sizeof(disc_information))
395 buflen = sizeof(disc_information);
396
397 cgc.cmd[8] = cgc.buflen = buflen;
398 ret = cdo->generic_packet(cdi, &cgc);
399 if (ret)
400 return ret;
401
402 /* return actual fill size */
403 return buflen;
404}
405
406/* This macro makes sure we don't have to check on cdrom_device_ops
407 * existence in the run-time routines below. Change_capability is a
408 * hack to have the capability flags defined const, while we can still
409 * change it here without gcc complaining at every line.
410 */
411#define ENSURE(cdo, call, bits) \
412do { \
413 if (cdo->call == NULL) \
414 WARN_ON_ONCE((cdo)->capability & (bits)); \
415} while (0)
416
417/*
418 * the first prototypes used 0x2c as the page code for the mrw mode page,
419 * subsequently this was changed to 0x03. probe the one used by this drive
420 */
421static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
422{
423 struct packet_command cgc;
424 char buffer[16];
425
426 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
427
428 cgc.timeout = HZ;
429 cgc.quiet = 1;
430
431 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
432 cdi->mrw_mode_page = MRW_MODE_PC;
433 return 0;
434 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
435 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
436 return 0;
437 }
438
439 return 1;
440}
441
442static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
443{
444 struct packet_command cgc;
445 struct mrw_feature_desc *mfd;
446 unsigned char buffer[16];
447 int ret;
448
449 *write = 0;
450
451 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
452
453 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
454 cgc.cmd[3] = CDF_MRW;
455 cgc.cmd[8] = sizeof(buffer);
456 cgc.quiet = 1;
457
458 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
459 return ret;
460
461 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
462 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
463 return 1;
464 *write = mfd->write;
465
466 if ((ret = cdrom_mrw_probe_pc(cdi))) {
467 *write = 0;
468 return ret;
469 }
470
471 return 0;
472}
473
474static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
475{
476 struct packet_command cgc;
477 unsigned char buffer[12];
478 int ret;
479
480 pr_info("%sstarting format\n", cont ? "Re" : "");
481
482 /*
483 * FmtData bit set (bit 4), format type is 1
484 */
485 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
486 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
487 cgc.cmd[1] = (1 << 4) | 1;
488
489 cgc.timeout = 5 * 60 * HZ;
490
491 /*
492 * 4 byte format list header, 8 byte format list descriptor
493 */
494 buffer[1] = 1 << 1;
495 buffer[3] = 8;
496
497 /*
498 * nr_blocks field
499 */
500 buffer[4] = 0xff;
501 buffer[5] = 0xff;
502 buffer[6] = 0xff;
503 buffer[7] = 0xff;
504
505 buffer[8] = 0x24 << 2;
506 buffer[11] = cont;
507
508 ret = cdi->ops->generic_packet(cdi, &cgc);
509 if (ret)
510 pr_info("bgformat failed\n");
511
512 return ret;
513}
514
515static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
516{
517 struct packet_command cgc;
518
519 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
520 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
521
522 /*
523 * Session = 1, Track = 0
524 */
525 cgc.cmd[1] = !!immed;
526 cgc.cmd[2] = 1 << 1;
527
528 cgc.timeout = 5 * 60 * HZ;
529
530 return cdi->ops->generic_packet(cdi, &cgc);
531}
532
533static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
534{
535 disc_information di;
536 int ret;
537
538 ret = cdrom_get_disc_info(cdi, &di);
539 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
540 return 1;
541
542 ret = 0;
543 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
544 pr_info("issuing MRW background format suspend\n");
545 ret = cdrom_mrw_bgformat_susp(cdi, 0);
546 }
547
548 if (!ret && cdi->media_written)
549 ret = cdrom_flush_cache(cdi);
550
551 return ret;
552}
553
554static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
555{
556 struct packet_command cgc;
557 struct mode_page_header *mph;
558 char buffer[16];
559 int ret, offset, size;
560
561 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
562
563 cgc.buffer = buffer;
564 cgc.buflen = sizeof(buffer);
565
566 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
567 if (ret)
568 return ret;
569
570 mph = (struct mode_page_header *)buffer;
571 offset = be16_to_cpu(mph->desc_length);
572 size = be16_to_cpu(mph->mode_data_length) + 2;
573
574 buffer[offset + 3] = space;
575 cgc.buflen = size;
576
577 ret = cdrom_mode_select(cdi, &cgc);
578 if (ret)
579 return ret;
580
581 pr_info("%s: mrw address space %s selected\n",
582 cdi->name, mrw_address_space[space]);
583 return 0;
584}
585
586int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi)
587{
588 static char banner_printed;
589 const struct cdrom_device_ops *cdo = cdi->ops;
590
591 cd_dbg(CD_OPEN, "entering register_cdrom\n");
592
593 if (cdo->open == NULL || cdo->release == NULL)
594 return -EINVAL;
595 if (!banner_printed) {
596 pr_info("Uniform CD-ROM driver " REVISION "\n");
597 banner_printed = 1;
598 cdrom_sysctl_register();
599 }
600
601 cdi->disk = disk;
602 disk->cdi = cdi;
603
604 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
605 if (cdo->check_events == NULL)
606 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
607 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
608 ENSURE(cdo, lock_door, CDC_LOCK);
609 ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
610 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
611 ENSURE(cdo, get_mcn, CDC_MCN);
612 ENSURE(cdo, reset, CDC_RESET);
613 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
614 cdi->mc_flags = 0;
615 cdi->options = CDO_USE_FFLAGS;
616 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
617
618 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
619 cdi->options |= (int) CDO_AUTO_CLOSE;
620 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
621 cdi->options |= (int) CDO_AUTO_EJECT;
622 if (lockdoor == 1)
623 cdi->options |= (int) CDO_LOCK;
624 if (check_media_type == 1)
625 cdi->options |= (int) CDO_CHECK_TYPE;
626
627 if (CDROM_CAN(CDC_MRW_W))
628 cdi->exit = cdrom_mrw_exit;
629
630 if (cdi->ops->read_cdda_bpc)
631 cdi->cdda_method = CDDA_BPC_FULL;
632 else
633 cdi->cdda_method = CDDA_OLD;
634
635 WARN_ON(!cdo->generic_packet);
636
637 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
638 mutex_lock(&cdrom_mutex);
639 list_add(&cdi->list, &cdrom_list);
640 mutex_unlock(&cdrom_mutex);
641 return 0;
642}
643EXPORT_SYMBOL(register_cdrom);
644#undef ENSURE
645
646void unregister_cdrom(struct cdrom_device_info *cdi)
647{
648 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
649
650 mutex_lock(&cdrom_mutex);
651 list_del(&cdi->list);
652 mutex_unlock(&cdrom_mutex);
653
654 if (cdi->exit)
655 cdi->exit(cdi);
656
657 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
658}
659EXPORT_SYMBOL(unregister_cdrom);
660
661int cdrom_get_media_event(struct cdrom_device_info *cdi,
662 struct media_event_desc *med)
663{
664 struct packet_command cgc;
665 unsigned char buffer[8];
666 struct event_header *eh = (struct event_header *)buffer;
667
668 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
669 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
670 cgc.cmd[1] = 1; /* IMMED */
671 cgc.cmd[4] = 1 << 4; /* media event */
672 cgc.cmd[8] = sizeof(buffer);
673 cgc.quiet = 1;
674
675 if (cdi->ops->generic_packet(cdi, &cgc))
676 return 1;
677
678 if (be16_to_cpu(eh->data_len) < sizeof(*med))
679 return 1;
680
681 if (eh->nea || eh->notification_class != 0x4)
682 return 1;
683
684 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
685 return 0;
686}
687EXPORT_SYMBOL(cdrom_get_media_event);
688
689static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
690 struct rwrt_feature_desc *rfd)
691{
692 struct packet_command cgc;
693 char buffer[24];
694 int ret;
695
696 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
697
698 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
699 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
700 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
701 cgc.quiet = 1;
702
703 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
704 return ret;
705
706 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
707 return 0;
708}
709
710static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
711{
712 struct packet_command cgc;
713 char buffer[16];
714 __be16 *feature_code;
715 int ret;
716
717 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
718
719 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
720 cgc.cmd[3] = CDF_HWDM;
721 cgc.cmd[8] = sizeof(buffer);
722 cgc.quiet = 1;
723
724 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
725 return ret;
726
727 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
728 if (be16_to_cpu(*feature_code) == CDF_HWDM)
729 return 0;
730
731 return 1;
732}
733
734
735static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
736{
737 struct rwrt_feature_desc rfd;
738 int ret;
739
740 *write = 0;
741
742 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
743 return ret;
744
745 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
746 *write = 1;
747
748 return 0;
749}
750
751static int cdrom_media_erasable(struct cdrom_device_info *cdi)
752{
753 disc_information di;
754 int ret;
755
756 ret = cdrom_get_disc_info(cdi, &di);
757 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
758 return -1;
759
760 return di.erasable;
761}
762
763/*
764 * FIXME: check RO bit
765 */
766static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
767{
768 int ret = cdrom_media_erasable(cdi);
769
770 /*
771 * allow writable open if media info read worked and media is
772 * erasable, _or_ if it fails since not all drives support it
773 */
774 if (!ret)
775 return 1;
776
777 return 0;
778}
779
780static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
781{
782 disc_information di;
783 int ret;
784
785 /*
786 * always reset to DMA lba space on open
787 */
788 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
789 pr_err("failed setting lba address space\n");
790 return 1;
791 }
792
793 ret = cdrom_get_disc_info(cdi, &di);
794 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
795 return 1;
796
797 if (!di.erasable)
798 return 1;
799
800 /*
801 * mrw_status
802 * 0 - not MRW formatted
803 * 1 - MRW bgformat started, but not running or complete
804 * 2 - MRW bgformat in progress
805 * 3 - MRW formatting complete
806 */
807 ret = 0;
808 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
809 if (!di.mrw_status)
810 ret = 1;
811 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
812 mrw_format_restart)
813 ret = cdrom_mrw_bgformat(cdi, 1);
814
815 return ret;
816}
817
818static int mo_open_write(struct cdrom_device_info *cdi)
819{
820 struct packet_command cgc;
821 char buffer[255];
822 int ret;
823
824 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
825 cgc.quiet = 1;
826
827 /*
828 * obtain write protect information as per
829 * drivers/scsi/sd.c:sd_read_write_protect_flag
830 */
831
832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
833 if (ret)
834 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
835 if (ret) {
836 cgc.buflen = 255;
837 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
838 }
839
840 /* drive gave us no info, let the user go ahead */
841 if (ret)
842 return 0;
843
844 return buffer[3] & 0x80;
845}
846
847static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
848{
849 struct rwrt_feature_desc rfd;
850 int ret;
851
852 if ((ret = cdrom_has_defect_mgt(cdi)))
853 return ret;
854
855 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
856 return ret;
857 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
858 ret = !rfd.curr;
859
860 cd_dbg(CD_OPEN, "can open for random write\n");
861 return ret;
862}
863
864static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
865{
866 struct packet_command cgc;
867 char buffer[32];
868 int mmc3_profile;
869
870 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
871
872 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
873 cgc.cmd[1] = 0;
874 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
875 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
876 cgc.quiet = 1;
877
878 if (cdi->ops->generic_packet(cdi, &cgc))
879 mmc3_profile = 0xffff;
880 else
881 mmc3_profile = (buffer[6] << 8) | buffer[7];
882
883 cdi->mmc3_profile = mmc3_profile;
884}
885
886static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
887{
888 switch (cdi->mmc3_profile) {
889 case 0x12: /* DVD-RAM */
890 case 0x1A: /* DVD+RW */
891 case 0x43: /* BD-RE */
892 return 0;
893 default:
894 return 1;
895 }
896}
897
898/*
899 * returns 0 for ok to open write, non-0 to disallow
900 */
901static int cdrom_open_write(struct cdrom_device_info *cdi)
902{
903 int mrw, mrw_write, ram_write;
904 int ret = 1;
905
906 mrw = 0;
907 if (!cdrom_is_mrw(cdi, &mrw_write))
908 mrw = 1;
909
910 if (CDROM_CAN(CDC_MO_DRIVE))
911 ram_write = 1;
912 else
913 (void) cdrom_is_random_writable(cdi, &ram_write);
914
915 if (mrw)
916 cdi->mask &= ~CDC_MRW;
917 else
918 cdi->mask |= CDC_MRW;
919
920 if (mrw_write)
921 cdi->mask &= ~CDC_MRW_W;
922 else
923 cdi->mask |= CDC_MRW_W;
924
925 if (ram_write)
926 cdi->mask &= ~CDC_RAM;
927 else
928 cdi->mask |= CDC_RAM;
929
930 if (CDROM_CAN(CDC_MRW_W))
931 ret = cdrom_mrw_open_write(cdi);
932 else if (CDROM_CAN(CDC_DVD_RAM))
933 ret = cdrom_dvdram_open_write(cdi);
934 else if (CDROM_CAN(CDC_RAM) &&
935 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
936 ret = cdrom_ram_open_write(cdi);
937 else if (CDROM_CAN(CDC_MO_DRIVE))
938 ret = mo_open_write(cdi);
939 else if (!cdrom_is_dvd_rw(cdi))
940 ret = 0;
941
942 return ret;
943}
944
945static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
946{
947 struct packet_command cgc;
948
949 if (cdi->mmc3_profile != 0x1a) {
950 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
951 return;
952 }
953
954 if (!cdi->media_written) {
955 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
956 return;
957 }
958
959 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
960
961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
962 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
963 cgc.timeout = 30*HZ;
964 cdi->ops->generic_packet(cdi, &cgc);
965
966 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
967 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
968 cgc.timeout = 3000*HZ;
969 cgc.quiet = 1;
970 cdi->ops->generic_packet(cdi, &cgc);
971
972 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
973 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
974 cgc.cmd[2] = 2; /* Close session */
975 cgc.quiet = 1;
976 cgc.timeout = 3000*HZ;
977 cdi->ops->generic_packet(cdi, &cgc);
978
979 cdi->media_written = 0;
980}
981
982/* badly broken, I know. Is due for a fixup anytime. */
983static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
984{
985 struct cdrom_tochdr header;
986 struct cdrom_tocentry entry;
987 int ret, i;
988 tracks->data = 0;
989 tracks->audio = 0;
990 tracks->cdi = 0;
991 tracks->xa = 0;
992 tracks->error = 0;
993 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
994
995 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
996 tracks->error = CDS_NO_INFO;
997 return;
998 }
999
1000 /* Grab the TOC header so we can see how many tracks there are */
1001 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1002 if (ret) {
1003 if (ret == -ENOMEDIUM)
1004 tracks->error = CDS_NO_DISC;
1005 else
1006 tracks->error = CDS_NO_INFO;
1007 return;
1008 }
1009 /* check what type of tracks are on this disc */
1010 entry.cdte_format = CDROM_MSF;
1011 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1012 entry.cdte_track = i;
1013 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1014 tracks->error = CDS_NO_INFO;
1015 return;
1016 }
1017 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1018 if (entry.cdte_format == 0x10)
1019 tracks->cdi++;
1020 else if (entry.cdte_format == 0x20)
1021 tracks->xa++;
1022 else
1023 tracks->data++;
1024 } else {
1025 tracks->audio++;
1026 }
1027 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1028 i, entry.cdte_format, entry.cdte_ctrl);
1029 }
1030 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1031 header.cdth_trk1, tracks->audio, tracks->data,
1032 tracks->cdi, tracks->xa);
1033}
1034
1035static
1036int open_for_data(struct cdrom_device_info *cdi)
1037{
1038 int ret;
1039 const struct cdrom_device_ops *cdo = cdi->ops;
1040 tracktype tracks;
1041 cd_dbg(CD_OPEN, "entering open_for_data\n");
1042 /* Check if the driver can report drive status. If it can, we
1043 can do clever things. If it can't, well, we at least tried! */
1044 if (cdo->drive_status != NULL) {
1045 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1046 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1047 if (ret == CDS_TRAY_OPEN) {
1048 cd_dbg(CD_OPEN, "the tray is open...\n");
1049 /* can/may i close it? */
1050 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1051 cdi->options & CDO_AUTO_CLOSE) {
1052 cd_dbg(CD_OPEN, "trying to close the tray\n");
1053 ret=cdo->tray_move(cdi,0);
1054 if (ret) {
1055 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1056 /* Ignore the error from the low
1057 level driver. We don't care why it
1058 couldn't close the tray. We only care
1059 that there is no disc in the drive,
1060 since that is the _REAL_ problem here.*/
1061 ret=-ENOMEDIUM;
1062 goto clean_up_and_return;
1063 }
1064 } else {
1065 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1066 ret=-ENOMEDIUM;
1067 goto clean_up_and_return;
1068 }
1069 /* Ok, the door should be closed now.. Check again */
1070 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1072 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1073 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 cd_dbg(CD_OPEN, "the tray is now closed\n");
1078 }
1079 /* the door should be closed now, check for the disc */
1080 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1081 if (ret!=CDS_DISC_OK) {
1082 ret = -ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 }
1086 cdrom_count_tracks(cdi, &tracks);
1087 if (tracks.error == CDS_NO_DISC) {
1088 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1089 ret=-ENOMEDIUM;
1090 goto clean_up_and_return;
1091 }
1092 /* CD-Players which don't use O_NONBLOCK, workman
1093 * for example, need bit CDO_CHECK_TYPE cleared! */
1094 if (tracks.data==0) {
1095 if (cdi->options & CDO_CHECK_TYPE) {
1096 /* give people a warning shot, now that CDO_CHECK_TYPE
1097 is the default case! */
1098 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1099 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1100 (unsigned int)task_pid_nr(current));
1101 ret=-EMEDIUMTYPE;
1102 goto clean_up_and_return;
1103 }
1104 else {
1105 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1106 }
1107 }
1108
1109 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1110
1111 /* all seems well, we can open the device */
1112 ret = cdo->open(cdi, 0); /* open for data */
1113 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1114 /* After all this careful checking, we shouldn't have problems
1115 opening the device, but we don't want the device locked if
1116 this somehow fails... */
1117 if (ret) {
1118 cd_dbg(CD_OPEN, "open device failed\n");
1119 goto clean_up_and_return;
1120 }
1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1122 cdo->lock_door(cdi, 1);
1123 cd_dbg(CD_OPEN, "door locked\n");
1124 }
1125 cd_dbg(CD_OPEN, "device opened successfully\n");
1126 return ret;
1127
1128 /* Something failed. Try to unlock the drive, because some drivers
1129 (notably ide-cd) lock the drive after every command. This produced
1130 a nasty bug where after mount failed, the drive would remain locked!
1131 This ensures that the drive gets unlocked after a mount fails. This
1132 is a goto to avoid bloating the driver with redundant code. */
1133clean_up_and_return:
1134 cd_dbg(CD_OPEN, "open failed\n");
1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1136 cdo->lock_door(cdi, 0);
1137 cd_dbg(CD_OPEN, "door unlocked\n");
1138 }
1139 return ret;
1140}
1141
1142/* We use the open-option O_NONBLOCK to indicate that the
1143 * purpose of opening is only for subsequent ioctl() calls; no device
1144 * integrity checks are performed.
1145 *
1146 * We hope that all cd-player programs will adopt this convention. It
1147 * is in their own interest: device control becomes a lot easier
1148 * this way.
1149 */
1150int cdrom_open(struct cdrom_device_info *cdi, blk_mode_t mode)
1151{
1152 int ret;
1153
1154 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1155
1156 /* if this was a O_NONBLOCK open and we should honor the flags,
1157 * do a quick open without drive/disc integrity checks. */
1158 cdi->use_count++;
1159 if ((mode & BLK_OPEN_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1160 ret = cdi->ops->open(cdi, 1);
1161 } else {
1162 ret = open_for_data(cdi);
1163 if (ret)
1164 goto err;
1165 if (CDROM_CAN(CDC_GENERIC_PACKET))
1166 cdrom_mmc3_profile(cdi);
1167 if (mode & BLK_OPEN_WRITE) {
1168 ret = -EROFS;
1169 if (cdrom_open_write(cdi))
1170 goto err_release;
1171 if (!CDROM_CAN(CDC_RAM))
1172 goto err_release;
1173 ret = 0;
1174 cdi->media_written = 0;
1175 }
1176 cdi->opened_for_data = true;
1177 }
1178
1179 if (ret)
1180 goto err;
1181
1182 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1183 cdi->name, cdi->use_count);
1184 return 0;
1185err_release:
1186 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1187 cdi->ops->lock_door(cdi, 0);
1188 cd_dbg(CD_OPEN, "door unlocked\n");
1189 }
1190 cdi->ops->release(cdi);
1191err:
1192 cdi->use_count--;
1193 return ret;
1194}
1195EXPORT_SYMBOL(cdrom_open);
1196
1197/* This code is similar to that in open_for_data. The routine is called
1198 whenever an audio play operation is requested.
1199*/
1200static int check_for_audio_disc(struct cdrom_device_info *cdi,
1201 const struct cdrom_device_ops *cdo)
1202{
1203 int ret;
1204 tracktype tracks;
1205 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1206 if (!(cdi->options & CDO_CHECK_TYPE))
1207 return 0;
1208 if (cdo->drive_status != NULL) {
1209 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1210 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1211 if (ret == CDS_TRAY_OPEN) {
1212 cd_dbg(CD_OPEN, "the tray is open...\n");
1213 /* can/may i close it? */
1214 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1215 cdi->options & CDO_AUTO_CLOSE) {
1216 cd_dbg(CD_OPEN, "trying to close the tray\n");
1217 ret=cdo->tray_move(cdi,0);
1218 if (ret) {
1219 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1220 /* Ignore the error from the low
1221 level driver. We don't care why it
1222 couldn't close the tray. We only care
1223 that there is no disc in the drive,
1224 since that is the _REAL_ problem here.*/
1225 return -ENOMEDIUM;
1226 }
1227 } else {
1228 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1229 return -ENOMEDIUM;
1230 }
1231 /* Ok, the door should be closed now.. Check again */
1232 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1233 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1234 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1235 return -ENOMEDIUM;
1236 }
1237 if (ret!=CDS_DISC_OK) {
1238 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1239 return -EIO;
1240 }
1241 cd_dbg(CD_OPEN, "the tray is now closed\n");
1242 }
1243 }
1244 cdrom_count_tracks(cdi, &tracks);
1245 if (tracks.error)
1246 return(tracks.error);
1247
1248 if (tracks.audio==0)
1249 return -EMEDIUMTYPE;
1250
1251 return 0;
1252}
1253
1254void cdrom_release(struct cdrom_device_info *cdi)
1255{
1256 const struct cdrom_device_ops *cdo = cdi->ops;
1257
1258 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1259
1260 if (cdi->use_count > 0)
1261 cdi->use_count--;
1262
1263 if (cdi->use_count == 0) {
1264 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1265 cdi->name);
1266 cdrom_dvd_rw_close_write(cdi);
1267
1268 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1269 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1270 cdo->lock_door(cdi, 0);
1271 }
1272 }
1273
1274 cdo->release(cdi);
1275
1276 if (cdi->use_count == 0 && cdi->opened_for_data) {
1277 if (cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1278 cdo->tray_move(cdi, 1);
1279 cdi->opened_for_data = false;
1280 }
1281}
1282EXPORT_SYMBOL(cdrom_release);
1283
1284static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1285 struct cdrom_changer_info *buf)
1286{
1287 struct packet_command cgc;
1288 const struct cdrom_device_ops *cdo = cdi->ops;
1289 int length;
1290
1291 /*
1292 * Sanyo changer isn't spec compliant (doesn't use regular change
1293 * LOAD_UNLOAD command, and it doesn't implement the mech status
1294 * command below
1295 */
1296 if (cdi->sanyo_slot) {
1297 buf->hdr.nslots = 3;
1298 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1299 for (length = 0; length < 3; length++) {
1300 buf->slots[length].disc_present = 1;
1301 buf->slots[length].change = 0;
1302 }
1303 return 0;
1304 }
1305
1306 length = sizeof(struct cdrom_mechstat_header) +
1307 cdi->capacity * sizeof(struct cdrom_slot);
1308
1309 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1310 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1311 cgc.cmd[8] = (length >> 8) & 0xff;
1312 cgc.cmd[9] = length & 0xff;
1313 return cdo->generic_packet(cdi, &cgc);
1314}
1315
1316static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1317{
1318 struct cdrom_changer_info *info;
1319 int ret;
1320
1321 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1322 if (cdi->sanyo_slot)
1323 return CDS_NO_INFO;
1324
1325 info = kmalloc(sizeof(*info), GFP_KERNEL);
1326 if (!info)
1327 return -ENOMEM;
1328
1329 if ((ret = cdrom_read_mech_status(cdi, info)))
1330 goto out_free;
1331
1332 if (info->slots[slot].disc_present)
1333 ret = CDS_DISC_OK;
1334 else
1335 ret = CDS_NO_DISC;
1336
1337out_free:
1338 kfree(info);
1339 return ret;
1340}
1341
1342/* Return the number of slots for an ATAPI/SCSI cdrom,
1343 * return 1 if not a changer.
1344 */
1345int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1346{
1347 int nslots = 1;
1348 struct cdrom_changer_info *info;
1349
1350 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1351 /* cdrom_read_mech_status requires a valid value for capacity: */
1352 cdi->capacity = 0;
1353
1354 info = kmalloc(sizeof(*info), GFP_KERNEL);
1355 if (!info)
1356 return -ENOMEM;
1357
1358 if (cdrom_read_mech_status(cdi, info) == 0)
1359 nslots = info->hdr.nslots;
1360
1361 kfree(info);
1362 return nslots;
1363}
1364EXPORT_SYMBOL(cdrom_number_of_slots);
1365
1366
1367/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1368static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1369{
1370 struct packet_command cgc;
1371
1372 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1373 if (cdi->sanyo_slot && slot < 0)
1374 return 0;
1375
1376 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1377 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1378 cgc.cmd[4] = 2 + (slot >= 0);
1379 cgc.cmd[8] = slot;
1380 cgc.timeout = 60 * HZ;
1381
1382 /* The Sanyo 3 CD changer uses byte 7 of the
1383 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1384 using the GPCMD_LOAD_UNLOAD opcode. */
1385 if (cdi->sanyo_slot && -1 < slot) {
1386 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1387 cgc.cmd[7] = slot;
1388 cgc.cmd[4] = cgc.cmd[8] = 0;
1389 cdi->sanyo_slot = slot ? slot : 3;
1390 }
1391
1392 return cdi->ops->generic_packet(cdi, &cgc);
1393}
1394
1395static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1396{
1397 struct cdrom_changer_info *info;
1398 int curslot;
1399 int ret;
1400
1401 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1402 if (!CDROM_CAN(CDC_SELECT_DISC))
1403 return -EDRIVE_CANT_DO_THIS;
1404
1405 if (cdi->ops->check_events)
1406 cdi->ops->check_events(cdi, 0, slot);
1407
1408 if (slot == CDSL_NONE) {
1409 signal_media_change(cdi);
1410 return cdrom_load_unload(cdi, -1);
1411 }
1412
1413 info = kmalloc(sizeof(*info), GFP_KERNEL);
1414 if (!info)
1415 return -ENOMEM;
1416
1417 if ((ret = cdrom_read_mech_status(cdi, info))) {
1418 kfree(info);
1419 return ret;
1420 }
1421
1422 curslot = info->hdr.curslot;
1423 kfree(info);
1424
1425 if (cdi->use_count > 1 || cdi->keeplocked) {
1426 if (slot == CDSL_CURRENT) {
1427 return curslot;
1428 } else {
1429 return -EBUSY;
1430 }
1431 }
1432
1433 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1434 which is useful if it had been previously unloaded.
1435 Whether it can or not, it returns the current slot.
1436 Similarly, if slot happens to be the current one, we still
1437 try and load it. */
1438 if (slot == CDSL_CURRENT)
1439 slot = curslot;
1440
1441 /* set media changed bits on both queues */
1442 signal_media_change(cdi);
1443 if ((ret = cdrom_load_unload(cdi, slot)))
1444 return ret;
1445
1446 return slot;
1447}
1448
1449/*
1450 * As cdrom implements an extra ioctl consumer for media changed
1451 * event, it needs to buffer ->check_events() output, such that event
1452 * is not lost for both the usual VFS and ioctl paths.
1453 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1454 * path.
1455 *
1456 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1457 * called in parallel and buffering fields are accessed without any
1458 * exclusion. The original media_changed code had the same problem.
1459 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1460 * and remove this cruft altogether. It doesn't have much usefulness
1461 * at this point.
1462 */
1463static void cdrom_update_events(struct cdrom_device_info *cdi,
1464 unsigned int clearing)
1465{
1466 unsigned int events;
1467
1468 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1469 cdi->vfs_events |= events;
1470 cdi->ioctl_events |= events;
1471}
1472
1473unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1474 unsigned int clearing)
1475{
1476 unsigned int events;
1477
1478 cdrom_update_events(cdi, clearing);
1479 events = cdi->vfs_events;
1480 cdi->vfs_events = 0;
1481 return events;
1482}
1483EXPORT_SYMBOL(cdrom_check_events);
1484
1485/* We want to make media_changed accessible to the user through an
1486 * ioctl. The main problem now is that we must double-buffer the
1487 * low-level implementation, to assure that the VFS and the user both
1488 * see a medium change once.
1489 */
1490
1491static
1492int media_changed(struct cdrom_device_info *cdi, int queue)
1493{
1494 unsigned int mask = (1 << (queue & 1));
1495 int ret = !!(cdi->mc_flags & mask);
1496 bool changed;
1497
1498 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1499 return ret;
1500
1501 /* changed since last call? */
1502 BUG_ON(!queue); /* shouldn't be called from VFS path */
1503 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1504 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1505 cdi->ioctl_events = 0;
1506
1507 if (changed) {
1508 signal_media_change(cdi);
1509 ret |= 1;
1510 cdi->media_written = 0;
1511 }
1512
1513 cdi->mc_flags &= ~mask; /* clear bit */
1514 return ret;
1515}
1516
1517/* Requests to the low-level drivers will /always/ be done in the
1518 following format convention:
1519
1520 CDROM_LBA: all data-related requests.
1521 CDROM_MSF: all audio-related requests.
1522
1523 However, a low-level implementation is allowed to refuse this
1524 request, and return information in its own favorite format.
1525
1526 It doesn't make sense /at all/ to ask for a play_audio in LBA
1527 format, or ask for multi-session info in MSF format. However, for
1528 backward compatibility these format requests will be satisfied, but
1529 the requests to the low-level drivers will be sanitized in the more
1530 meaningful format indicated above.
1531 */
1532
1533static
1534void sanitize_format(union cdrom_addr *addr,
1535 u_char * curr, u_char requested)
1536{
1537 if (*curr == requested)
1538 return; /* nothing to be done! */
1539 if (requested == CDROM_LBA) {
1540 addr->lba = (int) addr->msf.frame +
1541 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1542 } else { /* CDROM_MSF */
1543 int lba = addr->lba;
1544 addr->msf.frame = lba % 75;
1545 lba /= 75;
1546 lba += 2;
1547 addr->msf.second = lba % 60;
1548 addr->msf.minute = lba / 60;
1549 }
1550 *curr = requested;
1551}
1552
1553void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1554 int type)
1555{
1556 memset(cgc, 0, sizeof(struct packet_command));
1557 if (buf)
1558 memset(buf, 0, len);
1559 cgc->buffer = (char *) buf;
1560 cgc->buflen = len;
1561 cgc->data_direction = type;
1562 cgc->timeout = CDROM_DEF_TIMEOUT;
1563}
1564EXPORT_SYMBOL(init_cdrom_command);
1565
1566/* DVD handling */
1567
1568#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1569#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1570
1571static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1572{
1573 cgc->cmd[0] = GPCMD_REPORT_KEY;
1574 cgc->cmd[10] = type | (agid << 6);
1575 switch (type) {
1576 case 0: case 8: case 5: {
1577 cgc->buflen = 8;
1578 break;
1579 }
1580 case 1: {
1581 cgc->buflen = 16;
1582 break;
1583 }
1584 case 2: case 4: {
1585 cgc->buflen = 12;
1586 break;
1587 }
1588 }
1589 cgc->cmd[9] = cgc->buflen;
1590 cgc->data_direction = CGC_DATA_READ;
1591}
1592
1593static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1594{
1595 cgc->cmd[0] = GPCMD_SEND_KEY;
1596 cgc->cmd[10] = type | (agid << 6);
1597 switch (type) {
1598 case 1: {
1599 cgc->buflen = 16;
1600 break;
1601 }
1602 case 3: {
1603 cgc->buflen = 12;
1604 break;
1605 }
1606 case 6: {
1607 cgc->buflen = 8;
1608 break;
1609 }
1610 }
1611 cgc->cmd[9] = cgc->buflen;
1612 cgc->data_direction = CGC_DATA_WRITE;
1613}
1614
1615static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1616{
1617 int ret;
1618 u_char buf[20];
1619 struct packet_command cgc;
1620 const struct cdrom_device_ops *cdo = cdi->ops;
1621 rpc_state_t rpc_state;
1622
1623 memset(buf, 0, sizeof(buf));
1624 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1625
1626 switch (ai->type) {
1627 /* LU data send */
1628 case DVD_LU_SEND_AGID:
1629 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1630 cgc.quiet = 1;
1631 setup_report_key(&cgc, ai->lsa.agid, 0);
1632
1633 if ((ret = cdo->generic_packet(cdi, &cgc)))
1634 return ret;
1635
1636 ai->lsa.agid = buf[7] >> 6;
1637 /* Returning data, let host change state */
1638 break;
1639
1640 case DVD_LU_SEND_KEY1:
1641 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1642 setup_report_key(&cgc, ai->lsk.agid, 2);
1643
1644 if ((ret = cdo->generic_packet(cdi, &cgc)))
1645 return ret;
1646
1647 copy_key(ai->lsk.key, &buf[4]);
1648 /* Returning data, let host change state */
1649 break;
1650
1651 case DVD_LU_SEND_CHALLENGE:
1652 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1653 setup_report_key(&cgc, ai->lsc.agid, 1);
1654
1655 if ((ret = cdo->generic_packet(cdi, &cgc)))
1656 return ret;
1657
1658 copy_chal(ai->lsc.chal, &buf[4]);
1659 /* Returning data, let host change state */
1660 break;
1661
1662 /* Post-auth key */
1663 case DVD_LU_SEND_TITLE_KEY:
1664 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1665 cgc.quiet = 1;
1666 setup_report_key(&cgc, ai->lstk.agid, 4);
1667 cgc.cmd[5] = ai->lstk.lba;
1668 cgc.cmd[4] = ai->lstk.lba >> 8;
1669 cgc.cmd[3] = ai->lstk.lba >> 16;
1670 cgc.cmd[2] = ai->lstk.lba >> 24;
1671
1672 if ((ret = cdo->generic_packet(cdi, &cgc)))
1673 return ret;
1674
1675 ai->lstk.cpm = (buf[4] >> 7) & 1;
1676 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1677 ai->lstk.cgms = (buf[4] >> 4) & 3;
1678 copy_key(ai->lstk.title_key, &buf[5]);
1679 /* Returning data, let host change state */
1680 break;
1681
1682 case DVD_LU_SEND_ASF:
1683 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1684 setup_report_key(&cgc, ai->lsasf.agid, 5);
1685
1686 if ((ret = cdo->generic_packet(cdi, &cgc)))
1687 return ret;
1688
1689 ai->lsasf.asf = buf[7] & 1;
1690 break;
1691
1692 /* LU data receive (LU changes state) */
1693 case DVD_HOST_SEND_CHALLENGE:
1694 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1695 setup_send_key(&cgc, ai->hsc.agid, 1);
1696 buf[1] = 0xe;
1697 copy_chal(&buf[4], ai->hsc.chal);
1698
1699 if ((ret = cdo->generic_packet(cdi, &cgc)))
1700 return ret;
1701
1702 ai->type = DVD_LU_SEND_KEY1;
1703 break;
1704
1705 case DVD_HOST_SEND_KEY2:
1706 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1707 setup_send_key(&cgc, ai->hsk.agid, 3);
1708 buf[1] = 0xa;
1709 copy_key(&buf[4], ai->hsk.key);
1710
1711 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1712 ai->type = DVD_AUTH_FAILURE;
1713 return ret;
1714 }
1715 ai->type = DVD_AUTH_ESTABLISHED;
1716 break;
1717
1718 /* Misc */
1719 case DVD_INVALIDATE_AGID:
1720 cgc.quiet = 1;
1721 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1722 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1723 if ((ret = cdo->generic_packet(cdi, &cgc)))
1724 return ret;
1725 break;
1726
1727 /* Get region settings */
1728 case DVD_LU_SEND_RPC_STATE:
1729 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1730 setup_report_key(&cgc, 0, 8);
1731 memset(&rpc_state, 0, sizeof(rpc_state_t));
1732 cgc.buffer = (char *) &rpc_state;
1733
1734 if ((ret = cdo->generic_packet(cdi, &cgc)))
1735 return ret;
1736
1737 ai->lrpcs.type = rpc_state.type_code;
1738 ai->lrpcs.vra = rpc_state.vra;
1739 ai->lrpcs.ucca = rpc_state.ucca;
1740 ai->lrpcs.region_mask = rpc_state.region_mask;
1741 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1742 break;
1743
1744 /* Set region settings */
1745 case DVD_HOST_SEND_RPC_STATE:
1746 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1747 setup_send_key(&cgc, 0, 6);
1748 buf[1] = 6;
1749 buf[4] = ai->hrpcs.pdrc;
1750
1751 if ((ret = cdo->generic_packet(cdi, &cgc)))
1752 return ret;
1753 break;
1754
1755 default:
1756 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1757 return -ENOTTY;
1758 }
1759
1760 return 0;
1761}
1762
1763static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1764 struct packet_command *cgc)
1765{
1766 unsigned char buf[21], *base;
1767 struct dvd_layer *layer;
1768 const struct cdrom_device_ops *cdo = cdi->ops;
1769 int ret, layer_num = s->physical.layer_num;
1770
1771 if (layer_num >= DVD_LAYERS)
1772 return -EINVAL;
1773
1774 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1775 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1776 cgc->cmd[6] = layer_num;
1777 cgc->cmd[7] = s->type;
1778 cgc->cmd[9] = cgc->buflen & 0xff;
1779
1780 /*
1781 * refrain from reporting errors on non-existing layers (mainly)
1782 */
1783 cgc->quiet = 1;
1784
1785 ret = cdo->generic_packet(cdi, cgc);
1786 if (ret)
1787 return ret;
1788
1789 base = &buf[4];
1790 layer = &s->physical.layer[layer_num];
1791
1792 /*
1793 * place the data... really ugly, but at least we won't have to
1794 * worry about endianess in userspace.
1795 */
1796 memset(layer, 0, sizeof(*layer));
1797 layer->book_version = base[0] & 0xf;
1798 layer->book_type = base[0] >> 4;
1799 layer->min_rate = base[1] & 0xf;
1800 layer->disc_size = base[1] >> 4;
1801 layer->layer_type = base[2] & 0xf;
1802 layer->track_path = (base[2] >> 4) & 1;
1803 layer->nlayers = (base[2] >> 5) & 3;
1804 layer->track_density = base[3] & 0xf;
1805 layer->linear_density = base[3] >> 4;
1806 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1807 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1808 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1809 layer->bca = base[16] >> 7;
1810
1811 return 0;
1812}
1813
1814static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1815 struct packet_command *cgc)
1816{
1817 int ret;
1818 u_char buf[8];
1819 const struct cdrom_device_ops *cdo = cdi->ops;
1820
1821 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1822 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1823 cgc->cmd[6] = s->copyright.layer_num;
1824 cgc->cmd[7] = s->type;
1825 cgc->cmd[8] = cgc->buflen >> 8;
1826 cgc->cmd[9] = cgc->buflen & 0xff;
1827
1828 ret = cdo->generic_packet(cdi, cgc);
1829 if (ret)
1830 return ret;
1831
1832 s->copyright.cpst = buf[4];
1833 s->copyright.rmi = buf[5];
1834
1835 return 0;
1836}
1837
1838static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1839 struct packet_command *cgc)
1840{
1841 int ret, size;
1842 u_char *buf;
1843 const struct cdrom_device_ops *cdo = cdi->ops;
1844
1845 size = sizeof(s->disckey.value) + 4;
1846
1847 buf = kmalloc(size, GFP_KERNEL);
1848 if (!buf)
1849 return -ENOMEM;
1850
1851 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1852 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1853 cgc->cmd[7] = s->type;
1854 cgc->cmd[8] = size >> 8;
1855 cgc->cmd[9] = size & 0xff;
1856 cgc->cmd[10] = s->disckey.agid << 6;
1857
1858 ret = cdo->generic_packet(cdi, cgc);
1859 if (!ret)
1860 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1861
1862 kfree(buf);
1863 return ret;
1864}
1865
1866static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1867 struct packet_command *cgc)
1868{
1869 int ret, size = 4 + 188;
1870 u_char *buf;
1871 const struct cdrom_device_ops *cdo = cdi->ops;
1872
1873 buf = kmalloc(size, GFP_KERNEL);
1874 if (!buf)
1875 return -ENOMEM;
1876
1877 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1878 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1879 cgc->cmd[7] = s->type;
1880 cgc->cmd[9] = cgc->buflen & 0xff;
1881
1882 ret = cdo->generic_packet(cdi, cgc);
1883 if (ret)
1884 goto out;
1885
1886 s->bca.len = buf[0] << 8 | buf[1];
1887 if (s->bca.len < 12 || s->bca.len > 188) {
1888 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1889 s->bca.len);
1890 ret = -EIO;
1891 goto out;
1892 }
1893 memcpy(s->bca.value, &buf[4], s->bca.len);
1894 ret = 0;
1895out:
1896 kfree(buf);
1897 return ret;
1898}
1899
1900static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1901 struct packet_command *cgc)
1902{
1903 int ret = 0, size;
1904 u_char *buf;
1905 const struct cdrom_device_ops *cdo = cdi->ops;
1906
1907 size = sizeof(s->manufact.value) + 4;
1908
1909 buf = kmalloc(size, GFP_KERNEL);
1910 if (!buf)
1911 return -ENOMEM;
1912
1913 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1914 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1915 cgc->cmd[7] = s->type;
1916 cgc->cmd[8] = size >> 8;
1917 cgc->cmd[9] = size & 0xff;
1918
1919 ret = cdo->generic_packet(cdi, cgc);
1920 if (ret)
1921 goto out;
1922
1923 s->manufact.len = buf[0] << 8 | buf[1];
1924 if (s->manufact.len < 0) {
1925 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1926 s->manufact.len);
1927 ret = -EIO;
1928 } else {
1929 if (s->manufact.len > 2048) {
1930 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1931 s->manufact.len);
1932 s->manufact.len = 2048;
1933 }
1934 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1935 }
1936
1937out:
1938 kfree(buf);
1939 return ret;
1940}
1941
1942static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1943 struct packet_command *cgc)
1944{
1945 switch (s->type) {
1946 case DVD_STRUCT_PHYSICAL:
1947 return dvd_read_physical(cdi, s, cgc);
1948
1949 case DVD_STRUCT_COPYRIGHT:
1950 return dvd_read_copyright(cdi, s, cgc);
1951
1952 case DVD_STRUCT_DISCKEY:
1953 return dvd_read_disckey(cdi, s, cgc);
1954
1955 case DVD_STRUCT_BCA:
1956 return dvd_read_bca(cdi, s, cgc);
1957
1958 case DVD_STRUCT_MANUFACT:
1959 return dvd_read_manufact(cdi, s, cgc);
1960
1961 default:
1962 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1963 s->type);
1964 return -EINVAL;
1965 }
1966}
1967
1968int cdrom_mode_sense(struct cdrom_device_info *cdi,
1969 struct packet_command *cgc,
1970 int page_code, int page_control)
1971{
1972 const struct cdrom_device_ops *cdo = cdi->ops;
1973
1974 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1975
1976 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1977 cgc->cmd[2] = page_code | (page_control << 6);
1978 cgc->cmd[7] = cgc->buflen >> 8;
1979 cgc->cmd[8] = cgc->buflen & 0xff;
1980 cgc->data_direction = CGC_DATA_READ;
1981 return cdo->generic_packet(cdi, cgc);
1982}
1983EXPORT_SYMBOL(cdrom_mode_sense);
1984
1985int cdrom_mode_select(struct cdrom_device_info *cdi,
1986 struct packet_command *cgc)
1987{
1988 const struct cdrom_device_ops *cdo = cdi->ops;
1989
1990 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1991 memset(cgc->buffer, 0, 2);
1992 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1993 cgc->cmd[1] = 0x10; /* PF */
1994 cgc->cmd[7] = cgc->buflen >> 8;
1995 cgc->cmd[8] = cgc->buflen & 0xff;
1996 cgc->data_direction = CGC_DATA_WRITE;
1997 return cdo->generic_packet(cdi, cgc);
1998}
1999EXPORT_SYMBOL(cdrom_mode_select);
2000
2001static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2002 struct cdrom_subchnl *subchnl, int mcn)
2003{
2004 const struct cdrom_device_ops *cdo = cdi->ops;
2005 struct packet_command cgc;
2006 char buffer[32];
2007 int ret;
2008
2009 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2010 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2011 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2012 cgc.cmd[2] = 0x40; /* request subQ data */
2013 cgc.cmd[3] = mcn ? 2 : 1;
2014 cgc.cmd[8] = 16;
2015
2016 if ((ret = cdo->generic_packet(cdi, &cgc)))
2017 return ret;
2018
2019 subchnl->cdsc_audiostatus = cgc.buffer[1];
2020 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2021 subchnl->cdsc_trk = cgc.buffer[6];
2022 subchnl->cdsc_ind = cgc.buffer[7];
2023
2024 if (subchnl->cdsc_format == CDROM_LBA) {
2025 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2026 (cgc.buffer[9] << 16) |
2027 (cgc.buffer[10] << 8) |
2028 (cgc.buffer[11]));
2029 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2030 (cgc.buffer[13] << 16) |
2031 (cgc.buffer[14] << 8) |
2032 (cgc.buffer[15]));
2033 } else {
2034 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2035 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2036 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2037 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2038 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2039 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2040 }
2041
2042 return 0;
2043}
2044
2045/*
2046 * Specific READ_10 interface
2047 */
2048static int cdrom_read_cd(struct cdrom_device_info *cdi,
2049 struct packet_command *cgc, int lba,
2050 int blocksize, int nblocks)
2051{
2052 const struct cdrom_device_ops *cdo = cdi->ops;
2053
2054 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2055 cgc->cmd[0] = GPCMD_READ_10;
2056 cgc->cmd[2] = (lba >> 24) & 0xff;
2057 cgc->cmd[3] = (lba >> 16) & 0xff;
2058 cgc->cmd[4] = (lba >> 8) & 0xff;
2059 cgc->cmd[5] = lba & 0xff;
2060 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2061 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2062 cgc->cmd[8] = nblocks & 0xff;
2063 cgc->buflen = blocksize * nblocks;
2064 return cdo->generic_packet(cdi, cgc);
2065}
2066
2067/* very generic interface for reading the various types of blocks */
2068static int cdrom_read_block(struct cdrom_device_info *cdi,
2069 struct packet_command *cgc,
2070 int lba, int nblocks, int format, int blksize)
2071{
2072 const struct cdrom_device_ops *cdo = cdi->ops;
2073
2074 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2075 cgc->cmd[0] = GPCMD_READ_CD;
2076 /* expected sector size - cdda,mode1,etc. */
2077 cgc->cmd[1] = format << 2;
2078 /* starting address */
2079 cgc->cmd[2] = (lba >> 24) & 0xff;
2080 cgc->cmd[3] = (lba >> 16) & 0xff;
2081 cgc->cmd[4] = (lba >> 8) & 0xff;
2082 cgc->cmd[5] = lba & 0xff;
2083 /* number of blocks */
2084 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2085 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2086 cgc->cmd[8] = nblocks & 0xff;
2087 cgc->buflen = blksize * nblocks;
2088
2089 /* set the header info returned */
2090 switch (blksize) {
2091 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2092 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2093 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2094 default : cgc->cmd[9] = 0x10;
2095 }
2096
2097 return cdo->generic_packet(cdi, cgc);
2098}
2099
2100static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2101 int lba, int nframes)
2102{
2103 struct packet_command cgc;
2104 int ret = 0;
2105 int nr;
2106
2107 cdi->last_sense = 0;
2108
2109 memset(&cgc, 0, sizeof(cgc));
2110
2111 /*
2112 * start with will ra.nframes size, back down if alloc fails
2113 */
2114 nr = nframes;
2115 do {
2116 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL);
2117 if (cgc.buffer)
2118 break;
2119
2120 nr >>= 1;
2121 } while (nr);
2122
2123 if (!nr)
2124 return -ENOMEM;
2125
2126 cgc.data_direction = CGC_DATA_READ;
2127 while (nframes > 0) {
2128 if (nr > nframes)
2129 nr = nframes;
2130
2131 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2132 if (ret)
2133 break;
2134 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2135 ret = -EFAULT;
2136 break;
2137 }
2138 ubuf += CD_FRAMESIZE_RAW * nr;
2139 nframes -= nr;
2140 lba += nr;
2141 }
2142 kfree(cgc.buffer);
2143 return ret;
2144}
2145
2146static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2147 int lba, int nframes)
2148{
2149 int max_frames = (queue_max_sectors(cdi->disk->queue) << 9) /
2150 CD_FRAMESIZE_RAW;
2151 int nr, ret = 0;
2152
2153 cdi->last_sense = 0;
2154
2155 while (nframes) {
2156 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2157 nr = 1;
2158 else
2159 nr = min(nframes, max_frames);
2160
2161 ret = cdi->ops->read_cdda_bpc(cdi, ubuf, lba, nr,
2162 &cdi->last_sense);
2163 if (ret)
2164 break;
2165
2166 nframes -= nr;
2167 lba += nr;
2168 ubuf += (nr * CD_FRAMESIZE_RAW);
2169 }
2170
2171 return ret;
2172}
2173
2174static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2175 int lba, int nframes)
2176{
2177 int ret;
2178
2179 if (cdi->cdda_method == CDDA_OLD)
2180 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2181
2182retry:
2183 /*
2184 * for anything else than success and io error, we need to retry
2185 */
2186 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2187 if (!ret || ret != -EIO)
2188 return ret;
2189
2190 /*
2191 * I've seen drives get sense 4/8/3 udma crc errors on multi
2192 * frame dma, so drop to single frame dma if we need to
2193 */
2194 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2195 pr_info("dropping to single frame dma\n");
2196 cdi->cdda_method = CDDA_BPC_SINGLE;
2197 goto retry;
2198 }
2199
2200 /*
2201 * so we have an io error of some sort with multi frame dma. if the
2202 * condition wasn't a hardware error
2203 * problems, not for any error
2204 */
2205 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2206 return ret;
2207
2208 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2209 cdi->cdda_method = CDDA_OLD;
2210 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2211}
2212
2213int cdrom_multisession(struct cdrom_device_info *cdi,
2214 struct cdrom_multisession *info)
2215{
2216 u8 requested_format;
2217 int ret;
2218
2219 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2220 return -ENOSYS;
2221
2222 requested_format = info->addr_format;
2223 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2224 return -EINVAL;
2225 info->addr_format = CDROM_LBA;
2226
2227 ret = cdi->ops->get_last_session(cdi, info);
2228 if (!ret)
2229 sanitize_format(&info->addr, &info->addr_format,
2230 requested_format);
2231 return ret;
2232}
2233EXPORT_SYMBOL_GPL(cdrom_multisession);
2234
2235static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2236 void __user *argp)
2237{
2238 struct cdrom_multisession info;
2239 int ret;
2240
2241 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2242
2243 if (copy_from_user(&info, argp, sizeof(info)))
2244 return -EFAULT;
2245 ret = cdrom_multisession(cdi, &info);
2246 if (ret)
2247 return ret;
2248 if (copy_to_user(argp, &info, sizeof(info)))
2249 return -EFAULT;
2250
2251 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2252 return ret;
2253}
2254
2255static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2256{
2257 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2258
2259 if (!CDROM_CAN(CDC_OPEN_TRAY))
2260 return -ENOSYS;
2261 if (cdi->use_count != 1 || cdi->keeplocked)
2262 return -EBUSY;
2263 if (CDROM_CAN(CDC_LOCK)) {
2264 int ret = cdi->ops->lock_door(cdi, 0);
2265 if (ret)
2266 return ret;
2267 }
2268
2269 return cdi->ops->tray_move(cdi, 1);
2270}
2271
2272static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2273{
2274 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2275
2276 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2277 return -ENOSYS;
2278 return cdi->ops->tray_move(cdi, 0);
2279}
2280
2281static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2282 unsigned long arg)
2283{
2284 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2285
2286 if (!CDROM_CAN(CDC_OPEN_TRAY))
2287 return -ENOSYS;
2288 if (cdi->keeplocked)
2289 return -EBUSY;
2290
2291 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2292 if (arg)
2293 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2294 return 0;
2295}
2296
2297static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2298 unsigned long arg)
2299{
2300 struct cdrom_changer_info *info;
2301 int ret;
2302
2303 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2304
2305 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2306 return -ENOSYS;
2307
2308 /* cannot select disc or select current disc */
2309 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2310 return media_changed(cdi, 1);
2311
2312 if (arg >= cdi->capacity)
2313 return -EINVAL;
2314
2315 /* Prevent arg from speculatively bypassing the length check */
2316 barrier_nospec();
2317
2318 info = kmalloc(sizeof(*info), GFP_KERNEL);
2319 if (!info)
2320 return -ENOMEM;
2321
2322 ret = cdrom_read_mech_status(cdi, info);
2323 if (!ret)
2324 ret = info->slots[arg].change;
2325 kfree(info);
2326 return ret;
2327}
2328
2329/*
2330 * Media change detection with timing information.
2331 *
2332 * arg is a pointer to a cdrom_timed_media_change_info struct.
2333 * arg->last_media_change may be set by calling code to signal
2334 * the timestamp (in ms) of the last known media change (by the caller).
2335 * Upon successful return, ioctl call will set arg->last_media_change
2336 * to the latest media change timestamp known by the kernel/driver
2337 * and set arg->has_changed to 1 if that timestamp is more recent
2338 * than the timestamp set by the caller.
2339 */
2340static int cdrom_ioctl_timed_media_change(struct cdrom_device_info *cdi,
2341 unsigned long arg)
2342{
2343 int ret;
2344 struct cdrom_timed_media_change_info __user *info;
2345 struct cdrom_timed_media_change_info tmp_info;
2346
2347 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2348 return -ENOSYS;
2349
2350 info = (struct cdrom_timed_media_change_info __user *)arg;
2351 cd_dbg(CD_DO_IOCTL, "entering CDROM_TIMED_MEDIA_CHANGE\n");
2352
2353 ret = cdrom_ioctl_media_changed(cdi, CDSL_CURRENT);
2354 if (ret < 0)
2355 return ret;
2356
2357 if (copy_from_user(&tmp_info, info, sizeof(tmp_info)) != 0)
2358 return -EFAULT;
2359
2360 tmp_info.media_flags = 0;
2361 if (tmp_info.last_media_change - cdi->last_media_change_ms < 0)
2362 tmp_info.media_flags |= MEDIA_CHANGED_FLAG;
2363
2364 tmp_info.last_media_change = cdi->last_media_change_ms;
2365
2366 if (copy_to_user(info, &tmp_info, sizeof(*info)) != 0)
2367 return -EFAULT;
2368
2369 return 0;
2370}
2371
2372static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2373 unsigned long arg)
2374{
2375 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2376
2377 /*
2378 * Options need to be in sync with capability.
2379 * Too late for that, so we have to check each one separately.
2380 */
2381 switch (arg) {
2382 case CDO_USE_FFLAGS:
2383 case CDO_CHECK_TYPE:
2384 break;
2385 case CDO_LOCK:
2386 if (!CDROM_CAN(CDC_LOCK))
2387 return -ENOSYS;
2388 break;
2389 case 0:
2390 return cdi->options;
2391 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2392 default:
2393 if (!CDROM_CAN(arg))
2394 return -ENOSYS;
2395 }
2396 cdi->options |= (int) arg;
2397 return cdi->options;
2398}
2399
2400static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2401 unsigned long arg)
2402{
2403 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2404
2405 cdi->options &= ~(int) arg;
2406 return cdi->options;
2407}
2408
2409static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2410 unsigned long arg)
2411{
2412 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2413
2414 if (!CDROM_CAN(CDC_SELECT_SPEED))
2415 return -ENOSYS;
2416 return cdi->ops->select_speed(cdi, arg);
2417}
2418
2419static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2420 unsigned long arg)
2421{
2422 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2423
2424 if (!CDROM_CAN(CDC_SELECT_DISC))
2425 return -ENOSYS;
2426
2427 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2428 if (arg >= cdi->capacity)
2429 return -EINVAL;
2430 }
2431
2432 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2433 return cdrom_select_disc(cdi, arg);
2434}
2435
2436static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2437 struct block_device *bdev)
2438{
2439 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2440
2441 if (!capable(CAP_SYS_ADMIN))
2442 return -EACCES;
2443 if (!CDROM_CAN(CDC_RESET))
2444 return -ENOSYS;
2445 invalidate_bdev(bdev);
2446 return cdi->ops->reset(cdi);
2447}
2448
2449static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2450 unsigned long arg)
2451{
2452 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2453
2454 if (!CDROM_CAN(CDC_LOCK))
2455 return -EDRIVE_CANT_DO_THIS;
2456
2457 cdi->keeplocked = arg ? 1 : 0;
2458
2459 /*
2460 * Don't unlock the door on multiple opens by default, but allow
2461 * root to do so.
2462 */
2463 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2464 return -EBUSY;
2465 return cdi->ops->lock_door(cdi, arg);
2466}
2467
2468static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2469 unsigned long arg)
2470{
2471 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2472
2473 if (!capable(CAP_SYS_ADMIN))
2474 return -EACCES;
2475 debug = arg ? 1 : 0;
2476 return debug;
2477}
2478
2479static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2480{
2481 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2482 return (cdi->ops->capability & ~cdi->mask);
2483}
2484
2485/*
2486 * The following function is implemented, although very few audio
2487 * discs give Universal Product Code information, which should just be
2488 * the Medium Catalog Number on the box. Note, that the way the code
2489 * is written on the CD is /not/ uniform across all discs!
2490 */
2491static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2492 void __user *argp)
2493{
2494 struct cdrom_mcn mcn;
2495 int ret;
2496
2497 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2498
2499 if (!(cdi->ops->capability & CDC_MCN))
2500 return -ENOSYS;
2501 ret = cdi->ops->get_mcn(cdi, &mcn);
2502 if (ret)
2503 return ret;
2504
2505 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2506 return -EFAULT;
2507 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2508 return 0;
2509}
2510
2511static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2512 unsigned long arg)
2513{
2514 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2515
2516 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2517 return -ENOSYS;
2518 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2519 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2520 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2521 if (arg >= cdi->capacity)
2522 return -EINVAL;
2523 return cdrom_slot_status(cdi, arg);
2524}
2525
2526/*
2527 * Ok, this is where problems start. The current interface for the
2528 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2529 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2530 * is often the case, it is also very common for CDs to have some tracks
2531 * with data, and some tracks with audio. Just because I feel like it,
2532 * I declare the following to be the best way to cope. If the CD has ANY
2533 * data tracks on it, it will be returned as a data CD. If it has any XA
2534 * tracks, I will return it as that. Now I could simplify this interface
2535 * by combining these returns with the above, but this more clearly
2536 * demonstrates the problem with the current interface. Too bad this
2537 * wasn't designed to use bitmasks... -Erik
2538 *
2539 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2540 * User level programmers might feel the ioctl is not very useful.
2541 * ---david
2542 */
2543static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2544{
2545 tracktype tracks;
2546
2547 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2548
2549 cdrom_count_tracks(cdi, &tracks);
2550 if (tracks.error)
2551 return tracks.error;
2552
2553 /* Policy mode on */
2554 if (tracks.audio > 0) {
2555 if (!tracks.data && !tracks.cdi && !tracks.xa)
2556 return CDS_AUDIO;
2557 else
2558 return CDS_MIXED;
2559 }
2560
2561 if (tracks.cdi > 0)
2562 return CDS_XA_2_2;
2563 if (tracks.xa > 0)
2564 return CDS_XA_2_1;
2565 if (tracks.data > 0)
2566 return CDS_DATA_1;
2567 /* Policy mode off */
2568
2569 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2570 return CDS_NO_INFO;
2571}
2572
2573static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2574{
2575 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2576 return cdi->capacity;
2577}
2578
2579static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2580 void __user *argp)
2581{
2582 struct cdrom_subchnl q;
2583 u8 requested, back;
2584 int ret;
2585
2586 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2587
2588 if (copy_from_user(&q, argp, sizeof(q)))
2589 return -EFAULT;
2590
2591 requested = q.cdsc_format;
2592 if (requested != CDROM_MSF && requested != CDROM_LBA)
2593 return -EINVAL;
2594 q.cdsc_format = CDROM_MSF;
2595
2596 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2597 if (ret)
2598 return ret;
2599
2600 back = q.cdsc_format; /* local copy */
2601 sanitize_format(&q.cdsc_absaddr, &back, requested);
2602 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2603
2604 if (copy_to_user(argp, &q, sizeof(q)))
2605 return -EFAULT;
2606 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2607 return 0;
2608}
2609
2610static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2611 void __user *argp)
2612{
2613 struct cdrom_tochdr header;
2614 int ret;
2615
2616 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2617
2618 if (copy_from_user(&header, argp, sizeof(header)))
2619 return -EFAULT;
2620
2621 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2622 if (ret)
2623 return ret;
2624
2625 if (copy_to_user(argp, &header, sizeof(header)))
2626 return -EFAULT;
2627 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2628 return 0;
2629}
2630
2631int cdrom_read_tocentry(struct cdrom_device_info *cdi,
2632 struct cdrom_tocentry *entry)
2633{
2634 u8 requested_format = entry->cdte_format;
2635 int ret;
2636
2637 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2638 return -EINVAL;
2639
2640 /* make interface to low-level uniform */
2641 entry->cdte_format = CDROM_MSF;
2642 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, entry);
2643 if (!ret)
2644 sanitize_format(&entry->cdte_addr, &entry->cdte_format,
2645 requested_format);
2646 return ret;
2647}
2648EXPORT_SYMBOL_GPL(cdrom_read_tocentry);
2649
2650static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2651 void __user *argp)
2652{
2653 struct cdrom_tocentry entry;
2654 int ret;
2655
2656 if (copy_from_user(&entry, argp, sizeof(entry)))
2657 return -EFAULT;
2658 ret = cdrom_read_tocentry(cdi, &entry);
2659 if (!ret && copy_to_user(argp, &entry, sizeof(entry)))
2660 return -EFAULT;
2661 return ret;
2662}
2663
2664static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2665 void __user *argp)
2666{
2667 struct cdrom_msf msf;
2668
2669 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2670
2671 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2672 return -ENOSYS;
2673 if (copy_from_user(&msf, argp, sizeof(msf)))
2674 return -EFAULT;
2675 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2676}
2677
2678static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2679 void __user *argp)
2680{
2681 struct cdrom_ti ti;
2682 int ret;
2683
2684 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2685
2686 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2687 return -ENOSYS;
2688 if (copy_from_user(&ti, argp, sizeof(ti)))
2689 return -EFAULT;
2690
2691 ret = check_for_audio_disc(cdi, cdi->ops);
2692 if (ret)
2693 return ret;
2694 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2695}
2696static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2697 void __user *argp)
2698{
2699 struct cdrom_volctrl volume;
2700
2701 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2702
2703 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2704 return -ENOSYS;
2705 if (copy_from_user(&volume, argp, sizeof(volume)))
2706 return -EFAULT;
2707 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2708}
2709
2710static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2711 void __user *argp)
2712{
2713 struct cdrom_volctrl volume;
2714 int ret;
2715
2716 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2717
2718 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2719 return -ENOSYS;
2720
2721 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2722 if (ret)
2723 return ret;
2724
2725 if (copy_to_user(argp, &volume, sizeof(volume)))
2726 return -EFAULT;
2727 return 0;
2728}
2729
2730static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2731 unsigned int cmd)
2732{
2733 int ret;
2734
2735 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2736
2737 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2738 return -ENOSYS;
2739 ret = check_for_audio_disc(cdi, cdi->ops);
2740 if (ret)
2741 return ret;
2742 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2743}
2744
2745/*
2746 * Required when we need to use READ_10 to issue other than 2048 block
2747 * reads
2748 */
2749static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2750{
2751 const struct cdrom_device_ops *cdo = cdi->ops;
2752 struct packet_command cgc;
2753 struct modesel_head mh;
2754
2755 memset(&mh, 0, sizeof(mh));
2756 mh.block_desc_length = 0x08;
2757 mh.block_length_med = (size >> 8) & 0xff;
2758 mh.block_length_lo = size & 0xff;
2759
2760 memset(&cgc, 0, sizeof(cgc));
2761 cgc.cmd[0] = 0x15;
2762 cgc.cmd[1] = 1 << 4;
2763 cgc.cmd[4] = 12;
2764 cgc.buflen = sizeof(mh);
2765 cgc.buffer = (char *) &mh;
2766 cgc.data_direction = CGC_DATA_WRITE;
2767 mh.block_desc_length = 0x08;
2768 mh.block_length_med = (size >> 8) & 0xff;
2769 mh.block_length_lo = size & 0xff;
2770
2771 return cdo->generic_packet(cdi, &cgc);
2772}
2773
2774static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2775 __u16 track, __u8 type, track_information *ti)
2776{
2777 const struct cdrom_device_ops *cdo = cdi->ops;
2778 struct packet_command cgc;
2779 int ret, buflen;
2780
2781 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2782 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2783 cgc.cmd[1] = type & 3;
2784 cgc.cmd[4] = (track & 0xff00) >> 8;
2785 cgc.cmd[5] = track & 0xff;
2786 cgc.cmd[8] = 8;
2787 cgc.quiet = 1;
2788
2789 ret = cdo->generic_packet(cdi, &cgc);
2790 if (ret)
2791 return ret;
2792
2793 buflen = be16_to_cpu(ti->track_information_length) +
2794 sizeof(ti->track_information_length);
2795
2796 if (buflen > sizeof(track_information))
2797 buflen = sizeof(track_information);
2798
2799 cgc.cmd[8] = cgc.buflen = buflen;
2800 ret = cdo->generic_packet(cdi, &cgc);
2801 if (ret)
2802 return ret;
2803
2804 /* return actual fill size */
2805 return buflen;
2806}
2807
2808/* return the last written block on the CD-R media. this is for the udf
2809 file system. */
2810int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2811{
2812 struct cdrom_tocentry toc;
2813 disc_information di;
2814 track_information ti;
2815 __u32 last_track;
2816 int ret = -1, ti_size;
2817
2818 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2819 goto use_toc;
2820
2821 ret = cdrom_get_disc_info(cdi, &di);
2822 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2823 + sizeof(di.last_track_lsb)))
2824 goto use_toc;
2825
2826 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2827 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2828 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2829 if (ti_size < (int)offsetof(typeof(ti), track_start))
2830 goto use_toc;
2831
2832 /* if this track is blank, try the previous. */
2833 if (ti.blank) {
2834 if (last_track == 1)
2835 goto use_toc;
2836 last_track--;
2837 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2838 }
2839
2840 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2841 + sizeof(ti.track_size)))
2842 goto use_toc;
2843
2844 /* if last recorded field is valid, return it. */
2845 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2846 + sizeof(ti.last_rec_address))) {
2847 *last_written = be32_to_cpu(ti.last_rec_address);
2848 } else {
2849 /* make it up instead */
2850 *last_written = be32_to_cpu(ti.track_start) +
2851 be32_to_cpu(ti.track_size);
2852 if (ti.free_blocks)
2853 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2854 }
2855 return 0;
2856
2857 /* this is where we end up if the drive either can't do a
2858 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2859 it doesn't give enough information or fails. then we return
2860 the toc contents. */
2861use_toc:
2862 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2863 return -ENOSYS;
2864
2865 toc.cdte_format = CDROM_MSF;
2866 toc.cdte_track = CDROM_LEADOUT;
2867 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2868 return ret;
2869 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2870 *last_written = toc.cdte_addr.lba;
2871 return 0;
2872}
2873EXPORT_SYMBOL(cdrom_get_last_written);
2874
2875/* return the next writable block. also for udf file system. */
2876static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2877 long *next_writable)
2878{
2879 disc_information di;
2880 track_information ti;
2881 __u16 last_track;
2882 int ret, ti_size;
2883
2884 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2885 goto use_last_written;
2886
2887 ret = cdrom_get_disc_info(cdi, &di);
2888 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2889 + sizeof(di.last_track_lsb))
2890 goto use_last_written;
2891
2892 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2893 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2894 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2895 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2896 goto use_last_written;
2897
2898 /* if this track is blank, try the previous. */
2899 if (ti.blank) {
2900 if (last_track == 1)
2901 goto use_last_written;
2902 last_track--;
2903 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2904 if (ti_size < 0)
2905 goto use_last_written;
2906 }
2907
2908 /* if next recordable address field is valid, use it. */
2909 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2910 + sizeof(ti.next_writable)) {
2911 *next_writable = be32_to_cpu(ti.next_writable);
2912 return 0;
2913 }
2914
2915use_last_written:
2916 ret = cdrom_get_last_written(cdi, next_writable);
2917 if (ret) {
2918 *next_writable = 0;
2919 return ret;
2920 } else {
2921 *next_writable += 7;
2922 return 0;
2923 }
2924}
2925
2926static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2927 void __user *arg,
2928 struct packet_command *cgc,
2929 int cmd)
2930{
2931 struct scsi_sense_hdr sshdr;
2932 struct cdrom_msf msf;
2933 int blocksize = 0, format = 0, lba;
2934 int ret;
2935
2936 switch (cmd) {
2937 case CDROMREADRAW:
2938 blocksize = CD_FRAMESIZE_RAW;
2939 break;
2940 case CDROMREADMODE1:
2941 blocksize = CD_FRAMESIZE;
2942 format = 2;
2943 break;
2944 case CDROMREADMODE2:
2945 blocksize = CD_FRAMESIZE_RAW0;
2946 break;
2947 }
2948 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2949 return -EFAULT;
2950 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2951 /* FIXME: we need upper bound checking, too!! */
2952 if (lba < 0)
2953 return -EINVAL;
2954
2955 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2956 if (cgc->buffer == NULL)
2957 return -ENOMEM;
2958
2959 memset(&sshdr, 0, sizeof(sshdr));
2960 cgc->sshdr = &sshdr;
2961 cgc->data_direction = CGC_DATA_READ;
2962 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2963 if (ret && sshdr.sense_key == 0x05 &&
2964 sshdr.asc == 0x20 &&
2965 sshdr.ascq == 0x00) {
2966 /*
2967 * SCSI-II devices are not required to support
2968 * READ_CD, so let's try switching block size
2969 */
2970 if (blocksize != CD_FRAMESIZE) {
2971 ret = cdrom_switch_blocksize(cdi, blocksize);
2972 if (ret)
2973 goto out;
2974 }
2975 cgc->sshdr = NULL;
2976 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2977 if (blocksize != CD_FRAMESIZE)
2978 ret |= cdrom_switch_blocksize(cdi, CD_FRAMESIZE);
2979 }
2980 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2981 ret = -EFAULT;
2982out:
2983 kfree(cgc->buffer);
2984 return ret;
2985}
2986
2987static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2988 void __user *arg)
2989{
2990 struct cdrom_read_audio ra;
2991 int lba;
2992
2993#ifdef CONFIG_COMPAT
2994 if (in_compat_syscall()) {
2995 struct compat_cdrom_read_audio {
2996 union cdrom_addr addr;
2997 u8 addr_format;
2998 compat_int_t nframes;
2999 compat_caddr_t buf;
3000 } ra32;
3001
3002 if (copy_from_user(&ra32, arg, sizeof(ra32)))
3003 return -EFAULT;
3004
3005 ra = (struct cdrom_read_audio) {
3006 .addr = ra32.addr,
3007 .addr_format = ra32.addr_format,
3008 .nframes = ra32.nframes,
3009 .buf = compat_ptr(ra32.buf),
3010 };
3011 } else
3012#endif
3013 {
3014 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3015 sizeof(ra)))
3016 return -EFAULT;
3017 }
3018
3019 if (ra.addr_format == CDROM_MSF)
3020 lba = msf_to_lba(ra.addr.msf.minute,
3021 ra.addr.msf.second,
3022 ra.addr.msf.frame);
3023 else if (ra.addr_format == CDROM_LBA)
3024 lba = ra.addr.lba;
3025 else
3026 return -EINVAL;
3027
3028 /* FIXME: we need upper bound checking, too!! */
3029 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3030 return -EINVAL;
3031
3032 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3033}
3034
3035static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3036 void __user *arg)
3037{
3038 int ret;
3039 struct cdrom_subchnl q;
3040 u_char requested, back;
3041 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3042 return -EFAULT;
3043 requested = q.cdsc_format;
3044 if (!((requested == CDROM_MSF) ||
3045 (requested == CDROM_LBA)))
3046 return -EINVAL;
3047
3048 ret = cdrom_read_subchannel(cdi, &q, 0);
3049 if (ret)
3050 return ret;
3051 back = q.cdsc_format; /* local copy */
3052 sanitize_format(&q.cdsc_absaddr, &back, requested);
3053 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3054 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3055 return -EFAULT;
3056 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3057 return 0;
3058}
3059
3060static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3061 void __user *arg,
3062 struct packet_command *cgc)
3063{
3064 const struct cdrom_device_ops *cdo = cdi->ops;
3065 struct cdrom_msf msf;
3066 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3067 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3068 return -EFAULT;
3069 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3070 cgc->cmd[3] = msf.cdmsf_min0;
3071 cgc->cmd[4] = msf.cdmsf_sec0;
3072 cgc->cmd[5] = msf.cdmsf_frame0;
3073 cgc->cmd[6] = msf.cdmsf_min1;
3074 cgc->cmd[7] = msf.cdmsf_sec1;
3075 cgc->cmd[8] = msf.cdmsf_frame1;
3076 cgc->data_direction = CGC_DATA_NONE;
3077 return cdo->generic_packet(cdi, cgc);
3078}
3079
3080static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3081 void __user *arg,
3082 struct packet_command *cgc)
3083{
3084 const struct cdrom_device_ops *cdo = cdi->ops;
3085 struct cdrom_blk blk;
3086 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3087 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3088 return -EFAULT;
3089 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3090 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3091 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3092 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3093 cgc->cmd[5] = blk.from & 0xff;
3094 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3095 cgc->cmd[8] = blk.len & 0xff;
3096 cgc->data_direction = CGC_DATA_NONE;
3097 return cdo->generic_packet(cdi, cgc);
3098}
3099
3100static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3101 void __user *arg,
3102 struct packet_command *cgc,
3103 unsigned int cmd)
3104{
3105 struct cdrom_volctrl volctrl;
3106 unsigned char buffer[32];
3107 char mask[sizeof(buffer)];
3108 unsigned short offset;
3109 int ret;
3110
3111 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3112
3113 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3114 sizeof(volctrl)))
3115 return -EFAULT;
3116
3117 cgc->buffer = buffer;
3118 cgc->buflen = 24;
3119 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3120 if (ret)
3121 return ret;
3122
3123 /* originally the code depended on buffer[1] to determine
3124 how much data is available for transfer. buffer[1] is
3125 unfortunately ambigious and the only reliable way seem
3126 to be to simply skip over the block descriptor... */
3127 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3128
3129 if (offset + 16 > sizeof(buffer))
3130 return -E2BIG;
3131
3132 if (offset + 16 > cgc->buflen) {
3133 cgc->buflen = offset + 16;
3134 ret = cdrom_mode_sense(cdi, cgc,
3135 GPMODE_AUDIO_CTL_PAGE, 0);
3136 if (ret)
3137 return ret;
3138 }
3139
3140 /* sanity check */
3141 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3142 buffer[offset + 1] < 14)
3143 return -EINVAL;
3144
3145 /* now we have the current volume settings. if it was only
3146 a CDROMVOLREAD, return these values */
3147 if (cmd == CDROMVOLREAD) {
3148 volctrl.channel0 = buffer[offset+9];
3149 volctrl.channel1 = buffer[offset+11];
3150 volctrl.channel2 = buffer[offset+13];
3151 volctrl.channel3 = buffer[offset+15];
3152 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3153 sizeof(volctrl)))
3154 return -EFAULT;
3155 return 0;
3156 }
3157
3158 /* get the volume mask */
3159 cgc->buffer = mask;
3160 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3161 if (ret)
3162 return ret;
3163
3164 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3165 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3166 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3167 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3168
3169 /* set volume */
3170 cgc->buffer = buffer + offset - 8;
3171 memset(cgc->buffer, 0, 8);
3172 return cdrom_mode_select(cdi, cgc);
3173}
3174
3175static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3176 struct packet_command *cgc,
3177 int cmd)
3178{
3179 const struct cdrom_device_ops *cdo = cdi->ops;
3180 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3181 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3182 cgc->cmd[1] = 1;
3183 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3184 cgc->data_direction = CGC_DATA_NONE;
3185 return cdo->generic_packet(cdi, cgc);
3186}
3187
3188static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3189 struct packet_command *cgc,
3190 int cmd)
3191{
3192 const struct cdrom_device_ops *cdo = cdi->ops;
3193 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3194 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3195 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3196 cgc->data_direction = CGC_DATA_NONE;
3197 return cdo->generic_packet(cdi, cgc);
3198}
3199
3200static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3201 void __user *arg,
3202 struct packet_command *cgc)
3203{
3204 int ret;
3205 dvd_struct *s;
3206 int size = sizeof(dvd_struct);
3207
3208 if (!CDROM_CAN(CDC_DVD))
3209 return -ENOSYS;
3210
3211 s = memdup_user(arg, size);
3212 if (IS_ERR(s))
3213 return PTR_ERR(s);
3214
3215 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3216
3217 ret = dvd_read_struct(cdi, s, cgc);
3218 if (ret)
3219 goto out;
3220
3221 if (copy_to_user(arg, s, size))
3222 ret = -EFAULT;
3223out:
3224 kfree(s);
3225 return ret;
3226}
3227
3228static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3229 void __user *arg)
3230{
3231 int ret;
3232 dvd_authinfo ai;
3233 if (!CDROM_CAN(CDC_DVD))
3234 return -ENOSYS;
3235 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3236 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3237 return -EFAULT;
3238 ret = dvd_do_auth(cdi, &ai);
3239 if (ret)
3240 return ret;
3241 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3242 return -EFAULT;
3243 return 0;
3244}
3245
3246static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3247 void __user *arg)
3248{
3249 int ret;
3250 long next = 0;
3251 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3252 ret = cdrom_get_next_writable(cdi, &next);
3253 if (ret)
3254 return ret;
3255 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3256 return -EFAULT;
3257 return 0;
3258}
3259
3260static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3261 void __user *arg)
3262{
3263 int ret;
3264 long last = 0;
3265 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3266 ret = cdrom_get_last_written(cdi, &last);
3267 if (ret)
3268 return ret;
3269 if (in_compat_syscall())
3270 return put_user(last, (__s32 __user *)arg);
3271
3272 return put_user(last, (long __user *)arg);
3273}
3274
3275static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3276 unsigned long arg)
3277{
3278 struct packet_command cgc;
3279 void __user *userptr = (void __user *)arg;
3280
3281 memset(&cgc, 0, sizeof(cgc));
3282
3283 /* build a unified command and queue it through
3284 cdo->generic_packet() */
3285 switch (cmd) {
3286 case CDROMREADRAW:
3287 case CDROMREADMODE1:
3288 case CDROMREADMODE2:
3289 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3290 case CDROMREADAUDIO:
3291 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3292 case CDROMSUBCHNL:
3293 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3294 case CDROMPLAYMSF:
3295 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3296 case CDROMPLAYBLK:
3297 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3298 case CDROMVOLCTRL:
3299 case CDROMVOLREAD:
3300 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3301 case CDROMSTART:
3302 case CDROMSTOP:
3303 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3304 case CDROMPAUSE:
3305 case CDROMRESUME:
3306 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3307 case DVD_READ_STRUCT:
3308 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3309 case DVD_AUTH:
3310 return mmc_ioctl_dvd_auth(cdi, userptr);
3311 case CDROM_NEXT_WRITABLE:
3312 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3313 case CDROM_LAST_WRITTEN:
3314 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3315 }
3316
3317 return -ENOTTY;
3318}
3319
3320/*
3321 * Just about every imaginable ioctl is supported in the Uniform layer
3322 * these days.
3323 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3324 */
3325int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3326 unsigned int cmd, unsigned long arg)
3327{
3328 void __user *argp = (void __user *)arg;
3329 int ret;
3330
3331 switch (cmd) {
3332 case CDROMMULTISESSION:
3333 return cdrom_ioctl_multisession(cdi, argp);
3334 case CDROMEJECT:
3335 return cdrom_ioctl_eject(cdi);
3336 case CDROMCLOSETRAY:
3337 return cdrom_ioctl_closetray(cdi);
3338 case CDROMEJECT_SW:
3339 return cdrom_ioctl_eject_sw(cdi, arg);
3340 case CDROM_MEDIA_CHANGED:
3341 return cdrom_ioctl_media_changed(cdi, arg);
3342 case CDROM_TIMED_MEDIA_CHANGE:
3343 return cdrom_ioctl_timed_media_change(cdi, arg);
3344 case CDROM_SET_OPTIONS:
3345 return cdrom_ioctl_set_options(cdi, arg);
3346 case CDROM_CLEAR_OPTIONS:
3347 return cdrom_ioctl_clear_options(cdi, arg);
3348 case CDROM_SELECT_SPEED:
3349 return cdrom_ioctl_select_speed(cdi, arg);
3350 case CDROM_SELECT_DISC:
3351 return cdrom_ioctl_select_disc(cdi, arg);
3352 case CDROMRESET:
3353 return cdrom_ioctl_reset(cdi, bdev);
3354 case CDROM_LOCKDOOR:
3355 return cdrom_ioctl_lock_door(cdi, arg);
3356 case CDROM_DEBUG:
3357 return cdrom_ioctl_debug(cdi, arg);
3358 case CDROM_GET_CAPABILITY:
3359 return cdrom_ioctl_get_capability(cdi);
3360 case CDROM_GET_MCN:
3361 return cdrom_ioctl_get_mcn(cdi, argp);
3362 case CDROM_DRIVE_STATUS:
3363 return cdrom_ioctl_drive_status(cdi, arg);
3364 case CDROM_DISC_STATUS:
3365 return cdrom_ioctl_disc_status(cdi);
3366 case CDROM_CHANGER_NSLOTS:
3367 return cdrom_ioctl_changer_nslots(cdi);
3368 }
3369
3370 /*
3371 * Use the ioctls that are implemented through the generic_packet()
3372 * interface. this may look at bit funny, but if -ENOTTY is
3373 * returned that particular ioctl is not implemented and we
3374 * let it go through the device specific ones.
3375 */
3376 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3377 ret = mmc_ioctl(cdi, cmd, arg);
3378 if (ret != -ENOTTY)
3379 return ret;
3380 }
3381
3382 /*
3383 * Note: most of the cd_dbg() calls are commented out here,
3384 * because they fill up the sys log when CD players poll
3385 * the drive.
3386 */
3387 switch (cmd) {
3388 case CDROMSUBCHNL:
3389 return cdrom_ioctl_get_subchnl(cdi, argp);
3390 case CDROMREADTOCHDR:
3391 return cdrom_ioctl_read_tochdr(cdi, argp);
3392 case CDROMREADTOCENTRY:
3393 return cdrom_ioctl_read_tocentry(cdi, argp);
3394 case CDROMPLAYMSF:
3395 return cdrom_ioctl_play_msf(cdi, argp);
3396 case CDROMPLAYTRKIND:
3397 return cdrom_ioctl_play_trkind(cdi, argp);
3398 case CDROMVOLCTRL:
3399 return cdrom_ioctl_volctrl(cdi, argp);
3400 case CDROMVOLREAD:
3401 return cdrom_ioctl_volread(cdi, argp);
3402 case CDROMSTART:
3403 case CDROMSTOP:
3404 case CDROMPAUSE:
3405 case CDROMRESUME:
3406 return cdrom_ioctl_audioctl(cdi, cmd);
3407 }
3408
3409 return -ENOSYS;
3410}
3411EXPORT_SYMBOL(cdrom_ioctl);
3412
3413#ifdef CONFIG_SYSCTL
3414
3415#define CDROM_STR_SIZE 1000
3416
3417static struct cdrom_sysctl_settings {
3418 char info[CDROM_STR_SIZE]; /* general info */
3419 int autoclose; /* close tray upon mount, etc */
3420 int autoeject; /* eject on umount */
3421 int debug; /* turn on debugging messages */
3422 int lock; /* lock the door on device open */
3423 int check; /* check media type */
3424} cdrom_sysctl_settings;
3425
3426enum cdrom_print_option {
3427 CTL_NAME,
3428 CTL_SPEED,
3429 CTL_SLOTS,
3430 CTL_CAPABILITY
3431};
3432
3433static int cdrom_print_info(const char *header, int val, char *info,
3434 int *pos, enum cdrom_print_option option)
3435{
3436 const int max_size = sizeof(cdrom_sysctl_settings.info);
3437 struct cdrom_device_info *cdi;
3438 int ret;
3439
3440 ret = scnprintf(info + *pos, max_size - *pos, header);
3441 if (!ret)
3442 return 1;
3443
3444 *pos += ret;
3445
3446 list_for_each_entry(cdi, &cdrom_list, list) {
3447 switch (option) {
3448 case CTL_NAME:
3449 ret = scnprintf(info + *pos, max_size - *pos,
3450 "\t%s", cdi->name);
3451 break;
3452 case CTL_SPEED:
3453 ret = scnprintf(info + *pos, max_size - *pos,
3454 "\t%d", cdi->speed);
3455 break;
3456 case CTL_SLOTS:
3457 ret = scnprintf(info + *pos, max_size - *pos,
3458 "\t%d", cdi->capacity);
3459 break;
3460 case CTL_CAPABILITY:
3461 ret = scnprintf(info + *pos, max_size - *pos,
3462 "\t%d", CDROM_CAN(val) != 0);
3463 break;
3464 default:
3465 pr_info("invalid option%d\n", option);
3466 return 1;
3467 }
3468 if (!ret)
3469 return 1;
3470 *pos += ret;
3471 }
3472
3473 return 0;
3474}
3475
3476static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3477 void *buffer, size_t *lenp, loff_t *ppos)
3478{
3479 int pos;
3480 char *info = cdrom_sysctl_settings.info;
3481 const int max_size = sizeof(cdrom_sysctl_settings.info);
3482
3483 if (!*lenp || (*ppos && !write)) {
3484 *lenp = 0;
3485 return 0;
3486 }
3487
3488 mutex_lock(&cdrom_mutex);
3489
3490 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3491
3492 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3493 goto done;
3494 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3495 goto done;
3496 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3497 goto done;
3498 if (cdrom_print_info("\nCan close tray:\t",
3499 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3500 goto done;
3501 if (cdrom_print_info("\nCan open tray:\t",
3502 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3503 goto done;
3504 if (cdrom_print_info("\nCan lock tray:\t",
3505 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3506 goto done;
3507 if (cdrom_print_info("\nCan change speed:",
3508 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3509 goto done;
3510 if (cdrom_print_info("\nCan select disk:",
3511 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3512 goto done;
3513 if (cdrom_print_info("\nCan read multisession:",
3514 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3515 goto done;
3516 if (cdrom_print_info("\nCan read MCN:\t",
3517 CDC_MCN, info, &pos, CTL_CAPABILITY))
3518 goto done;
3519 if (cdrom_print_info("\nReports media changed:",
3520 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3521 goto done;
3522 if (cdrom_print_info("\nCan play audio:\t",
3523 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3524 goto done;
3525 if (cdrom_print_info("\nCan write CD-R:\t",
3526 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3527 goto done;
3528 if (cdrom_print_info("\nCan write CD-RW:",
3529 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3530 goto done;
3531 if (cdrom_print_info("\nCan read DVD:\t",
3532 CDC_DVD, info, &pos, CTL_CAPABILITY))
3533 goto done;
3534 if (cdrom_print_info("\nCan write DVD-R:",
3535 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3536 goto done;
3537 if (cdrom_print_info("\nCan write DVD-RAM:",
3538 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3539 goto done;
3540 if (cdrom_print_info("\nCan read MRW:\t",
3541 CDC_MRW, info, &pos, CTL_CAPABILITY))
3542 goto done;
3543 if (cdrom_print_info("\nCan write MRW:\t",
3544 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3545 goto done;
3546 if (cdrom_print_info("\nCan write RAM:\t",
3547 CDC_RAM, info, &pos, CTL_CAPABILITY))
3548 goto done;
3549 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3550 goto done;
3551doit:
3552 mutex_unlock(&cdrom_mutex);
3553 return proc_dostring(ctl, write, buffer, lenp, ppos);
3554done:
3555 pr_info("info buffer too small\n");
3556 goto doit;
3557}
3558
3559/* Unfortunately, per device settings are not implemented through
3560 procfs/sysctl yet. When they are, this will naturally disappear. For now
3561 just update all drives. Later this will become the template on which
3562 new registered drives will be based. */
3563static void cdrom_update_settings(void)
3564{
3565 struct cdrom_device_info *cdi;
3566
3567 mutex_lock(&cdrom_mutex);
3568 list_for_each_entry(cdi, &cdrom_list, list) {
3569 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3570 cdi->options |= CDO_AUTO_CLOSE;
3571 else if (!autoclose)
3572 cdi->options &= ~CDO_AUTO_CLOSE;
3573 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3574 cdi->options |= CDO_AUTO_EJECT;
3575 else if (!autoeject)
3576 cdi->options &= ~CDO_AUTO_EJECT;
3577 if (lockdoor && CDROM_CAN(CDC_LOCK))
3578 cdi->options |= CDO_LOCK;
3579 else if (!lockdoor)
3580 cdi->options &= ~CDO_LOCK;
3581 if (check_media_type)
3582 cdi->options |= CDO_CHECK_TYPE;
3583 else
3584 cdi->options &= ~CDO_CHECK_TYPE;
3585 }
3586 mutex_unlock(&cdrom_mutex);
3587}
3588
3589static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3590 void *buffer, size_t *lenp, loff_t *ppos)
3591{
3592 int ret;
3593
3594 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3595
3596 if (write) {
3597
3598 /* we only care for 1 or 0. */
3599 autoclose = !!cdrom_sysctl_settings.autoclose;
3600 autoeject = !!cdrom_sysctl_settings.autoeject;
3601 debug = !!cdrom_sysctl_settings.debug;
3602 lockdoor = !!cdrom_sysctl_settings.lock;
3603 check_media_type = !!cdrom_sysctl_settings.check;
3604
3605 /* update the option flags according to the changes. we
3606 don't have per device options through sysctl yet,
3607 but we will have and then this will disappear. */
3608 cdrom_update_settings();
3609 }
3610
3611 return ret;
3612}
3613
3614/* Place files in /proc/sys/dev/cdrom */
3615static struct ctl_table cdrom_table[] = {
3616 {
3617 .procname = "info",
3618 .data = &cdrom_sysctl_settings.info,
3619 .maxlen = CDROM_STR_SIZE,
3620 .mode = 0444,
3621 .proc_handler = cdrom_sysctl_info,
3622 },
3623 {
3624 .procname = "autoclose",
3625 .data = &cdrom_sysctl_settings.autoclose,
3626 .maxlen = sizeof(int),
3627 .mode = 0644,
3628 .proc_handler = cdrom_sysctl_handler,
3629 },
3630 {
3631 .procname = "autoeject",
3632 .data = &cdrom_sysctl_settings.autoeject,
3633 .maxlen = sizeof(int),
3634 .mode = 0644,
3635 .proc_handler = cdrom_sysctl_handler,
3636 },
3637 {
3638 .procname = "debug",
3639 .data = &cdrom_sysctl_settings.debug,
3640 .maxlen = sizeof(int),
3641 .mode = 0644,
3642 .proc_handler = cdrom_sysctl_handler,
3643 },
3644 {
3645 .procname = "lock",
3646 .data = &cdrom_sysctl_settings.lock,
3647 .maxlen = sizeof(int),
3648 .mode = 0644,
3649 .proc_handler = cdrom_sysctl_handler,
3650 },
3651 {
3652 .procname = "check_media",
3653 .data = &cdrom_sysctl_settings.check,
3654 .maxlen = sizeof(int),
3655 .mode = 0644,
3656 .proc_handler = cdrom_sysctl_handler
3657 },
3658};
3659static struct ctl_table_header *cdrom_sysctl_header;
3660
3661static void cdrom_sysctl_register(void)
3662{
3663 static atomic_t initialized = ATOMIC_INIT(0);
3664
3665 if (!atomic_add_unless(&initialized, 1, 1))
3666 return;
3667
3668 cdrom_sysctl_header = register_sysctl("dev/cdrom", cdrom_table);
3669
3670 /* set the defaults */
3671 cdrom_sysctl_settings.autoclose = autoclose;
3672 cdrom_sysctl_settings.autoeject = autoeject;
3673 cdrom_sysctl_settings.debug = debug;
3674 cdrom_sysctl_settings.lock = lockdoor;
3675 cdrom_sysctl_settings.check = check_media_type;
3676}
3677
3678static void cdrom_sysctl_unregister(void)
3679{
3680 if (cdrom_sysctl_header)
3681 unregister_sysctl_table(cdrom_sysctl_header);
3682}
3683
3684#else /* CONFIG_SYSCTL */
3685
3686static void cdrom_sysctl_register(void)
3687{
3688}
3689
3690static void cdrom_sysctl_unregister(void)
3691{
3692}
3693
3694#endif /* CONFIG_SYSCTL */
3695
3696static int __init cdrom_init(void)
3697{
3698 cdrom_sysctl_register();
3699
3700 return 0;
3701}
3702
3703static void __exit cdrom_exit(void)
3704{
3705 pr_info("Uniform CD-ROM driver unloaded\n");
3706 cdrom_sysctl_unregister();
3707}
3708
3709module_init(cdrom_init);
3710module_exit(cdrom_exit);
3711MODULE_LICENSE("GPL");