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