blob: e36d160c458fdb334556129b9559d147aefb2472 [file] [log] [blame]
Uwe Zeisbergerf30c2262006-10-03 23:01:26 +02001/* linux/drivers/cdrom/cdrom.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 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>
Lucas De Marchi25985ed2011-03-30 22:57:33 -030033 -- New maintainer! As David A. van Leeuwen has been too busy to actively
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 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
Joe Perchese597cd02010-07-01 08:24:32 +0200245#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247#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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268#include <linux/module.h>
269#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270#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>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -0800284#include <linux/uaccess.h>
Christoph Hellwig82ed4db2017-01-27 09:46:29 +0100285#include <scsi/scsi_request.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
287/* used to tell the module to turn on full debugging messages */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030288static bool debug;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289/* default compatibility mode */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030290static bool autoclose=1;
291static bool autoeject;
292static bool lockdoor = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293/* will we ever get to use this... sigh. */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030294static bool check_media_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295/* automatically restart mrw format */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030296static bool mrw_format_restart = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297module_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
Dave Young554988d2007-06-19 09:14:26 +0200304static DEFINE_MUTEX(cdrom_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
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
Joe Perches5944b2c2014-05-04 17:05:02 -0700315#if (ERRLOGMASK != CD_NOTHING)
316#define cd_dbg(type, fmt, ...) \
Joe Perchese597cd02010-07-01 08:24:32 +0200317do { \
318 if ((ERRLOGMASK & type) || debug == 1) \
Joe Perches5944b2c2014-05-04 17:05:02 -0700319 pr_debug(fmt, ##__VA_ARGS__); \
Joe Perchese597cd02010-07-01 08:24:32 +0200320} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321#else
Joe Perches5944b2c2014-05-04 17:05:02 -0700322#define cd_dbg(type, fmt, ...) \
Joe Perchese597cd02010-07-01 08:24:32 +0200323do { \
324 if (0 && (ERRLOGMASK & type) || debug == 1) \
Joe Perches5944b2c2014-05-04 17:05:02 -0700325 pr_debug(fmt, ##__VA_ARGS__); \
Joe Perchese597cd02010-07-01 08:24:32 +0200326} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327#endif
328
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329/* 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
Jens Axboe2e11c202007-01-03 08:10:35 +0100333/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339/* Not-exported routines. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341static void cdrom_sysctl_register(void);
Akinobu Mita17672cf2008-03-26 12:08:59 +0100342
Akinobu Mita7fd097d2008-03-26 12:09:02 +0100343static LIST_HEAD(cdrom_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Kees Cook853fe1b2017-02-13 16:25:26 -0800345int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
346 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347{
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}
Kees Cook853fe1b2017-02-13 16:25:26 -0800357EXPORT_SYMBOL(cdrom_dummy_generic_packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Joe Perches40569c62014-05-04 17:05:12 -0700359static int cdrom_flush_cache(struct cdrom_device_info *cdi)
360{
361 struct packet_command cgc;
362
363 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
364 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
365
366 cgc.timeout = 5 * 60 * HZ;
367
368 return cdi->ops->generic_packet(cdi, &cgc);
369}
370
Joe Perchesbd6f0bb2014-05-04 17:05:13 -0700371/* requires CD R/RW */
372static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
373 disc_information *di)
374{
Kees Cook853fe1b2017-02-13 16:25:26 -0800375 const struct cdrom_device_ops *cdo = cdi->ops;
Joe Perchesbd6f0bb2014-05-04 17:05:13 -0700376 struct packet_command cgc;
377 int ret, buflen;
378
379 /* set up command and get the disc info */
380 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
381 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
382 cgc.cmd[8] = cgc.buflen = 2;
383 cgc.quiet = 1;
384
385 ret = cdo->generic_packet(cdi, &cgc);
386 if (ret)
387 return ret;
388
389 /* not all drives have the same disc_info length, so requeue
390 * packet with the length the drive tells us it can supply
391 */
392 buflen = be16_to_cpu(di->disc_information_length) +
393 sizeof(di->disc_information_length);
394
395 if (buflen > sizeof(disc_information))
396 buflen = sizeof(disc_information);
397
398 cgc.cmd[8] = cgc.buflen = buflen;
399 ret = cdo->generic_packet(cdi, &cgc);
400 if (ret)
401 return ret;
402
403 /* return actual fill size */
404 return buflen;
405}
406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407/* This macro makes sure we don't have to check on cdrom_device_ops
408 * existence in the run-time routines below. Change_capability is a
409 * hack to have the capability flags defined const, while we can still
410 * change it here without gcc complaining at every line.
411 */
Joe Perches40569c62014-05-04 17:05:12 -0700412#define ENSURE(call, bits) \
413do { \
414 if (cdo->call == NULL) \
415 *change_capability &= ~(bits); \
416} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
418/*
419 * the first prototypes used 0x2c as the page code for the mrw mode page,
420 * subsequently this was changed to 0x03. probe the one used by this drive
421 */
422static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
423{
424 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200425 char buffer[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200427 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429 cgc.timeout = HZ;
430 cgc.quiet = 1;
431
432 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
433 cdi->mrw_mode_page = MRW_MODE_PC;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200434 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
436 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200437 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 }
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200439
440 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441}
442
443static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
444{
445 struct packet_command cgc;
446 struct mrw_feature_desc *mfd;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200447 unsigned char buffer[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 int ret;
449
450 *write = 0;
451
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200452 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
454 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
455 cgc.cmd[3] = CDF_MRW;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200456 cgc.cmd[8] = sizeof(buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 cgc.quiet = 1;
458
459 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200460 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
462 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200463 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
464 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 *write = mfd->write;
466
467 if ((ret = cdrom_mrw_probe_pc(cdi))) {
468 *write = 0;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200469 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 }
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200471
472 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473}
474
475static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
476{
477 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200478 unsigned char buffer[12];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 int ret;
480
Joe Perchese597cd02010-07-01 08:24:32 +0200481 pr_info("%sstarting format\n", cont ? "Re" : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
483 /*
484 * FmtData bit set (bit 4), format type is 1
485 */
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200486 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
488 cgc.cmd[1] = (1 << 4) | 1;
489
490 cgc.timeout = 5 * 60 * HZ;
491
492 /*
493 * 4 byte format list header, 8 byte format list descriptor
494 */
495 buffer[1] = 1 << 1;
496 buffer[3] = 8;
497
498 /*
499 * nr_blocks field
500 */
501 buffer[4] = 0xff;
502 buffer[5] = 0xff;
503 buffer[6] = 0xff;
504 buffer[7] = 0xff;
505
506 buffer[8] = 0x24 << 2;
507 buffer[11] = cont;
508
509 ret = cdi->ops->generic_packet(cdi, &cgc);
510 if (ret)
Joe Perchese597cd02010-07-01 08:24:32 +0200511 pr_info("bgformat failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
513 return ret;
514}
515
516static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
517{
518 struct packet_command cgc;
519
520 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
521 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
522
523 /*
524 * Session = 1, Track = 0
525 */
526 cgc.cmd[1] = !!immed;
527 cgc.cmd[2] = 1 << 1;
528
529 cgc.timeout = 5 * 60 * HZ;
530
531 return cdi->ops->generic_packet(cdi, &cgc);
532}
533
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
535{
536 disc_information di;
537 int ret;
538
539 ret = cdrom_get_disc_info(cdi, &di);
540 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
541 return 1;
542
543 ret = 0;
544 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
Joe Perchese597cd02010-07-01 08:24:32 +0200545 pr_info("issuing MRW background format suspend\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 ret = cdrom_mrw_bgformat_susp(cdi, 0);
547 }
548
Jens Axboe7da21a02005-05-01 12:12:52 -0700549 if (!ret && cdi->media_written)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 ret = cdrom_flush_cache(cdi);
551
552 return ret;
553}
554
555static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
556{
557 struct packet_command cgc;
558 struct mode_page_header *mph;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200559 char buffer[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 int ret, offset, size;
561
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200562 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200564 cgc.buffer = buffer;
565 cgc.buflen = sizeof(buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
Joe Perches40569c62014-05-04 17:05:12 -0700567 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
568 if (ret)
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200569 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Joe Perches40569c62014-05-04 17:05:12 -0700571 mph = (struct mode_page_header *)buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 offset = be16_to_cpu(mph->desc_length);
573 size = be16_to_cpu(mph->mode_data_length) + 2;
574
575 buffer[offset + 3] = space;
576 cgc.buflen = size;
577
Joe Perches40569c62014-05-04 17:05:12 -0700578 ret = cdrom_mode_select(cdi, &cgc);
579 if (ret)
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200580 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
Joe Perchese597cd02010-07-01 08:24:32 +0200582 pr_info("%s: mrw address space %s selected\n",
583 cdi->name, mrw_address_space[space]);
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200584 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585}
586
Joe Perches40569c62014-05-04 17:05:12 -0700587int register_cdrom(struct cdrom_device_info *cdi)
588{
589 static char banner_printed;
Kees Cook853fe1b2017-02-13 16:25:26 -0800590 const struct cdrom_device_ops *cdo = cdi->ops;
Joe Perches40569c62014-05-04 17:05:12 -0700591 int *change_capability = (int *)&cdo->capability; /* hack */
592
593 cd_dbg(CD_OPEN, "entering register_cdrom\n");
594
595 if (cdo->open == NULL || cdo->release == NULL)
596 return -EINVAL;
597 if (!banner_printed) {
598 pr_info("Uniform CD-ROM driver " REVISION "\n");
599 banner_printed = 1;
600 cdrom_sysctl_register();
601 }
602
603 ENSURE(drive_status, CDC_DRIVE_STATUS);
604 if (cdo->check_events == NULL && cdo->media_changed == NULL)
605 *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
606 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
607 ENSURE(lock_door, CDC_LOCK);
608 ENSURE(select_speed, CDC_SELECT_SPEED);
609 ENSURE(get_last_session, CDC_MULTI_SESSION);
610 ENSURE(get_mcn, CDC_MCN);
611 ENSURE(reset, CDC_RESET);
612 ENSURE(generic_packet, CDC_GENERIC_PACKET);
613 cdi->mc_flags = 0;
Joe Perches40569c62014-05-04 17:05:12 -0700614 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
Kees Cook853fe1b2017-02-13 16:25:26 -0800633 WARN_ON(!cdo->generic_packet);
Joe Perches40569c62014-05-04 17:05:12 -0700634
635 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
636 mutex_lock(&cdrom_mutex);
637 list_add(&cdi->list, &cdrom_list);
638 mutex_unlock(&cdrom_mutex);
639 return 0;
640}
641#undef ENSURE
642
643void unregister_cdrom(struct cdrom_device_info *cdi)
644{
645 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
646
647 mutex_lock(&cdrom_mutex);
648 list_del(&cdi->list);
649 mutex_unlock(&cdrom_mutex);
650
651 if (cdi->exit)
652 cdi->exit(cdi);
653
Joe Perches40569c62014-05-04 17:05:12 -0700654 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
655}
656
657int cdrom_get_media_event(struct cdrom_device_info *cdi,
658 struct media_event_desc *med)
659{
660 struct packet_command cgc;
661 unsigned char buffer[8];
662 struct event_header *eh = (struct event_header *)buffer;
663
664 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
665 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
666 cgc.cmd[1] = 1; /* IMMED */
667 cgc.cmd[4] = 1 << 4; /* media event */
668 cgc.cmd[8] = sizeof(buffer);
669 cgc.quiet = 1;
670
671 if (cdi->ops->generic_packet(cdi, &cgc))
672 return 1;
673
674 if (be16_to_cpu(eh->data_len) < sizeof(*med))
675 return 1;
676
677 if (eh->nea || eh->notification_class != 0x4)
678 return 1;
679
680 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
681 return 0;
682}
683
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
685 struct rwrt_feature_desc *rfd)
686{
687 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200688 char buffer[24];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 int ret;
690
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200691 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
693 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
694 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200695 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 cgc.quiet = 1;
697
698 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200699 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200702 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703}
704
705static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
706{
707 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200708 char buffer[16];
Alexey Dobriyan56052d52005-12-01 17:10:40 -0500709 __be16 *feature_code;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 int ret;
711
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200712 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
714 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
715 cgc.cmd[3] = CDF_HWDM;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200716 cgc.cmd[8] = sizeof(buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 cgc.quiet = 1;
718
719 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200720 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
Alexey Dobriyan56052d52005-12-01 17:10:40 -0500722 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 if (be16_to_cpu(*feature_code) == CDF_HWDM)
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200724 return 0;
725
726 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727}
728
729
730static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
731{
732 struct rwrt_feature_desc rfd;
733 int ret;
734
735 *write = 0;
736
737 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
738 return ret;
739
740 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
741 *write = 1;
742
743 return 0;
744}
745
746static int cdrom_media_erasable(struct cdrom_device_info *cdi)
747{
748 disc_information di;
749 int ret;
750
751 ret = cdrom_get_disc_info(cdi, &di);
752 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
753 return -1;
754
755 return di.erasable;
756}
757
758/*
759 * FIXME: check RO bit
760 */
761static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
762{
763 int ret = cdrom_media_erasable(cdi);
764
765 /*
766 * allow writable open if media info read worked and media is
767 * erasable, _or_ if it fails since not all drives support it
768 */
769 if (!ret)
770 return 1;
771
772 return 0;
773}
774
775static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
776{
777 disc_information di;
778 int ret;
779
780 /*
781 * always reset to DMA lba space on open
782 */
783 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
Joe Perchese597cd02010-07-01 08:24:32 +0200784 pr_err("failed setting lba address space\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 return 1;
786 }
787
788 ret = cdrom_get_disc_info(cdi, &di);
789 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
790 return 1;
791
792 if (!di.erasable)
793 return 1;
794
795 /*
796 * mrw_status
797 * 0 - not MRW formatted
798 * 1 - MRW bgformat started, but not running or complete
799 * 2 - MRW bgformat in progress
800 * 3 - MRW formatting complete
801 */
802 ret = 0;
Joe Perchese597cd02010-07-01 08:24:32 +0200803 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 if (!di.mrw_status)
805 ret = 1;
806 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
807 mrw_format_restart)
808 ret = cdrom_mrw_bgformat(cdi, 1);
809
810 return ret;
811}
812
813static int mo_open_write(struct cdrom_device_info *cdi)
814{
815 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200816 char buffer[255];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 int ret;
818
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 cgc.quiet = 1;
821
822 /*
823 * obtain write protect information as per
824 * drivers/scsi/sd.c:sd_read_write_protect_flag
825 */
826
827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
828 if (ret)
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
830 if (ret) {
831 cgc.buflen = 255;
832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
833 }
834
835 /* drive gave us no info, let the user go ahead */
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200836 if (ret)
837 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200839 return buffer[3] & 0x80;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840}
841
842static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
843{
844 struct rwrt_feature_desc rfd;
845 int ret;
846
847 if ((ret = cdrom_has_defect_mgt(cdi)))
848 return ret;
849
850 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
851 return ret;
852 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
853 ret = !rfd.curr;
854
Joe Perches5944b2c2014-05-04 17:05:02 -0700855 cd_dbg(CD_OPEN, "can open for random write\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 return ret;
857}
858
859static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
860{
861 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200862 char buffer[32];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 int ret, mmc3_profile;
864
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200865 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866
867 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
868 cgc.cmd[1] = 0;
869 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200870 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 cgc.quiet = 1;
872
873 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
874 mmc3_profile = 0xffff;
875 else
876 mmc3_profile = (buffer[6] << 8) | buffer[7];
877
878 cdi->mmc3_profile = mmc3_profile;
879}
880
881static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
882{
883 switch (cdi->mmc3_profile) {
884 case 0x12: /* DVD-RAM */
885 case 0x1A: /* DVD+RW */
Georgios Toptsidisf7e78682015-09-25 10:50:08 +0300886 case 0x43: /* BD-RE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 return 0;
888 default:
889 return 1;
890 }
891}
892
893/*
894 * returns 0 for ok to open write, non-0 to disallow
895 */
896static int cdrom_open_write(struct cdrom_device_info *cdi)
897{
898 int mrw, mrw_write, ram_write;
899 int ret = 1;
900
901 mrw = 0;
902 if (!cdrom_is_mrw(cdi, &mrw_write))
903 mrw = 1;
904
905 if (CDROM_CAN(CDC_MO_DRIVE))
906 ram_write = 1;
907 else
908 (void) cdrom_is_random_writable(cdi, &ram_write);
909
910 if (mrw)
911 cdi->mask &= ~CDC_MRW;
912 else
913 cdi->mask |= CDC_MRW;
914
915 if (mrw_write)
916 cdi->mask &= ~CDC_MRW_W;
917 else
918 cdi->mask |= CDC_MRW_W;
919
920 if (ram_write)
921 cdi->mask &= ~CDC_RAM;
922 else
923 cdi->mask |= CDC_RAM;
924
925 if (CDROM_CAN(CDC_MRW_W))
926 ret = cdrom_mrw_open_write(cdi);
927 else if (CDROM_CAN(CDC_DVD_RAM))
928 ret = cdrom_dvdram_open_write(cdi);
929 else if (CDROM_CAN(CDC_RAM) &&
930 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
931 ret = cdrom_ram_open_write(cdi);
932 else if (CDROM_CAN(CDC_MO_DRIVE))
933 ret = mo_open_write(cdi);
934 else if (!cdrom_is_dvd_rw(cdi))
935 ret = 0;
936
937 return ret;
938}
939
940static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
941{
942 struct packet_command cgc;
943
944 if (cdi->mmc3_profile != 0x1a) {
Joe Perches5944b2c2014-05-04 17:05:02 -0700945 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 return;
947 }
948
949 if (!cdi->media_written) {
Joe Perches5944b2c2014-05-04 17:05:02 -0700950 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 return;
952 }
953
Joe Perchese597cd02010-07-01 08:24:32 +0200954 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
957 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
958 cgc.timeout = 30*HZ;
959 cdi->ops->generic_packet(cdi, &cgc);
960
961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
962 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
963 cgc.timeout = 3000*HZ;
964 cgc.quiet = 1;
965 cdi->ops->generic_packet(cdi, &cgc);
966
967 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
968 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
969 cgc.cmd[2] = 2; /* Close session */
970 cgc.quiet = 1;
971 cgc.timeout = 3000*HZ;
972 cdi->ops->generic_packet(cdi, &cgc);
973
974 cdi->media_written = 0;
975}
976
977static int cdrom_close_write(struct cdrom_device_info *cdi)
978{
979#if 0
980 return cdrom_flush_cache(cdi);
981#else
982 return 0;
983#endif
984}
985
Joe Perchesa8033932014-05-04 17:05:11 -0700986/* badly broken, I know. Is due for a fixup anytime. */
987static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
988{
989 struct cdrom_tochdr header;
990 struct cdrom_tocentry entry;
991 int ret, i;
992 tracks->data = 0;
993 tracks->audio = 0;
994 tracks->cdi = 0;
995 tracks->xa = 0;
996 tracks->error = 0;
997 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
998 /* Grab the TOC header so we can see how many tracks there are */
999 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1000 if (ret) {
1001 if (ret == -ENOMEDIUM)
1002 tracks->error = CDS_NO_DISC;
1003 else
1004 tracks->error = CDS_NO_INFO;
1005 return;
1006 }
1007 /* check what type of tracks are on this disc */
1008 entry.cdte_format = CDROM_MSF;
1009 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1010 entry.cdte_track = i;
1011 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1012 tracks->error = CDS_NO_INFO;
1013 return;
1014 }
1015 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1016 if (entry.cdte_format == 0x10)
1017 tracks->cdi++;
1018 else if (entry.cdte_format == 0x20)
1019 tracks->xa++;
1020 else
1021 tracks->data++;
1022 } else {
1023 tracks->audio++;
1024 }
1025 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1026 i, entry.cdte_format, entry.cdte_ctrl);
1027 }
1028 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1029 header.cdth_trk1, tracks->audio, tracks->data,
1030 tracks->cdi, tracks->xa);
1031}
1032
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033static
Joe Perches82b91542014-05-04 17:05:05 -07001034int open_for_data(struct cdrom_device_info *cdi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035{
1036 int ret;
Kees Cook853fe1b2017-02-13 16:25:26 -08001037 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 tracktype tracks;
Joe Perches5944b2c2014-05-04 17:05:02 -07001039 cd_dbg(CD_OPEN, "entering open_for_data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 /* Check if the driver can report drive status. If it can, we
1041 can do clever things. If it can't, well, we at least tried! */
1042 if (cdo->drive_status != NULL) {
1043 ret = cdo->drive_status(cdi, CDSL_CURRENT);
Joe Perches5944b2c2014-05-04 17:05:02 -07001044 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 if (ret == CDS_TRAY_OPEN) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001046 cd_dbg(CD_OPEN, "the tray is open...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 /* can/may i close it? */
1048 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1049 cdi->options & CDO_AUTO_CLOSE) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001050 cd_dbg(CD_OPEN, "trying to close the tray\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 ret=cdo->tray_move(cdi,0);
1052 if (ret) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001053 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 /* Ignore the error from the low
1055 level driver. We don't care why it
1056 couldn't close the tray. We only care
1057 that there is no disc in the drive,
1058 since that is the _REAL_ problem here.*/
1059 ret=-ENOMEDIUM;
1060 goto clean_up_and_return;
1061 }
1062 } else {
Joe Perches5944b2c2014-05-04 17:05:02 -07001063 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 ret=-ENOMEDIUM;
1065 goto clean_up_and_return;
1066 }
1067 /* Ok, the door should be closed now.. Check again */
1068 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1069 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001070 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1071 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 ret=-ENOMEDIUM;
1073 goto clean_up_and_return;
1074 }
Joe Perches5944b2c2014-05-04 17:05:02 -07001075 cd_dbg(CD_OPEN, "the tray is now closed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 }
1077 /* the door should be closed now, check for the disc */
1078 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1079 if (ret!=CDS_DISC_OK) {
1080 ret = -ENOMEDIUM;
1081 goto clean_up_and_return;
1082 }
1083 }
1084 cdrom_count_tracks(cdi, &tracks);
1085 if (tracks.error == CDS_NO_DISC) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001086 cd_dbg(CD_OPEN, "bummer. no disc.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 ret=-ENOMEDIUM;
1088 goto clean_up_and_return;
1089 }
1090 /* CD-Players which don't use O_NONBLOCK, workman
1091 * for example, need bit CDO_CHECK_TYPE cleared! */
1092 if (tracks.data==0) {
1093 if (cdi->options & CDO_CHECK_TYPE) {
1094 /* give people a warning shot, now that CDO_CHECK_TYPE
1095 is the default case! */
Joe Perches5944b2c2014-05-04 17:05:02 -07001096 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1097 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1098 (unsigned int)task_pid_nr(current));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 ret=-EMEDIUMTYPE;
1100 goto clean_up_and_return;
1101 }
1102 else {
Joe Perches5944b2c2014-05-04 17:05:02 -07001103 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 }
1105 }
1106
Joe Perches5944b2c2014-05-04 17:05:02 -07001107 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108
1109 /* all seems well, we can open the device */
1110 ret = cdo->open(cdi, 0); /* open for data */
Joe Perches5944b2c2014-05-04 17:05:02 -07001111 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 /* After all this careful checking, we shouldn't have problems
1113 opening the device, but we don't want the device locked if
1114 this somehow fails... */
1115 if (ret) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001116 cd_dbg(CD_OPEN, "open device failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 goto clean_up_and_return;
1118 }
1119 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1120 cdo->lock_door(cdi, 1);
Joe Perches5944b2c2014-05-04 17:05:02 -07001121 cd_dbg(CD_OPEN, "door locked\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 }
Joe Perches5944b2c2014-05-04 17:05:02 -07001123 cd_dbg(CD_OPEN, "device opened successfully\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 return ret;
1125
1126 /* Something failed. Try to unlock the drive, because some drivers
1127 (notably ide-cd) lock the drive after every command. This produced
1128 a nasty bug where after mount failed, the drive would remain locked!
1129 This ensures that the drive gets unlocked after a mount fails. This
1130 is a goto to avoid bloating the driver with redundant code. */
1131clean_up_and_return:
Joe Perches5944b2c2014-05-04 17:05:02 -07001132 cd_dbg(CD_OPEN, "open failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1134 cdo->lock_door(cdi, 0);
Joe Perches5944b2c2014-05-04 17:05:02 -07001135 cd_dbg(CD_OPEN, "door unlocked\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 }
1137 return ret;
1138}
1139
Joe Perches82b91542014-05-04 17:05:05 -07001140/* We use the open-option O_NONBLOCK to indicate that the
1141 * purpose of opening is only for subsequent ioctl() calls; no device
1142 * integrity checks are performed.
1143 *
1144 * We hope that all cd-player programs will adopt this convention. It
1145 * is in their own interest: device control becomes a lot easier
1146 * this way.
1147 */
1148int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1149 fmode_t mode)
1150{
1151 int ret;
1152
1153 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1154
1155 /* open is event synchronization point, check events first */
1156 check_disk_change(bdev);
1157
1158 /* if this was a O_NONBLOCK open and we should honor the flags,
1159 * do a quick open without drive/disc integrity checks. */
1160 cdi->use_count++;
1161 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1162 ret = cdi->ops->open(cdi, 1);
1163 } else {
1164 ret = open_for_data(cdi);
1165 if (ret)
1166 goto err;
1167 cdrom_mmc3_profile(cdi);
1168 if (mode & FMODE_WRITE) {
1169 ret = -EROFS;
1170 if (cdrom_open_write(cdi))
1171 goto err_release;
1172 if (!CDROM_CAN(CDC_RAM))
1173 goto err_release;
1174 ret = 0;
1175 cdi->media_written = 0;
1176 }
1177 }
1178
1179 if (ret)
1180 goto err;
1181
1182 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1183 cdi->name, cdi->use_count);
1184 return 0;
1185err_release:
1186 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1187 cdi->ops->lock_door(cdi, 0);
1188 cd_dbg(CD_OPEN, "door unlocked\n");
1189 }
1190 cdi->ops->release(cdi);
1191err:
1192 cdi->use_count--;
1193 return ret;
1194}
1195
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196/* This code is similar to that in open_for_data. The routine is called
1197 whenever an audio play operation is requested.
1198*/
Kees Cook853fe1b2017-02-13 16:25:26 -08001199static int check_for_audio_disc(struct cdrom_device_info *cdi,
1200 const struct cdrom_device_ops *cdo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201{
1202 int ret;
1203 tracktype tracks;
Joe Perches5944b2c2014-05-04 17:05:02 -07001204 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 if (!(cdi->options & CDO_CHECK_TYPE))
1206 return 0;
1207 if (cdo->drive_status != NULL) {
1208 ret = cdo->drive_status(cdi, CDSL_CURRENT);
Joe Perches5944b2c2014-05-04 17:05:02 -07001209 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 if (ret == CDS_TRAY_OPEN) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001211 cd_dbg(CD_OPEN, "the tray is open...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 /* can/may i close it? */
1213 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1214 cdi->options & CDO_AUTO_CLOSE) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001215 cd_dbg(CD_OPEN, "trying to close the tray\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 ret=cdo->tray_move(cdi,0);
1217 if (ret) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001218 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 /* Ignore the error from the low
1220 level driver. We don't care why it
1221 couldn't close the tray. We only care
1222 that there is no disc in the drive,
1223 since that is the _REAL_ problem here.*/
1224 return -ENOMEDIUM;
1225 }
1226 } else {
Joe Perches5944b2c2014-05-04 17:05:02 -07001227 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 return -ENOMEDIUM;
1229 }
1230 /* Ok, the door should be closed now.. Check again */
1231 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1232 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001233 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 return -ENOMEDIUM;
1235 }
1236 if (ret!=CDS_DISC_OK) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001237 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 return -EIO;
1239 }
Joe Perches5944b2c2014-05-04 17:05:02 -07001240 cd_dbg(CD_OPEN, "the tray is now closed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 }
1242 }
1243 cdrom_count_tracks(cdi, &tracks);
1244 if (tracks.error)
1245 return(tracks.error);
1246
1247 if (tracks.audio==0)
1248 return -EMEDIUMTYPE;
1249
1250 return 0;
1251}
1252
Al Virobbc1cc92007-10-07 17:54:28 -04001253void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254{
Kees Cook853fe1b2017-02-13 16:25:26 -08001255 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 int opened_for_data;
1257
Joe Perches5944b2c2014-05-04 17:05:02 -07001258 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259
1260 if (cdi->use_count > 0)
1261 cdi->use_count--;
Borislav Petkov35841f72008-02-06 01:38:08 -08001262
1263 if (cdi->use_count == 0) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001264 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1265 cdi->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 cdrom_dvd_rw_close_write(cdi);
Borislav Petkov35841f72008-02-06 01:38:08 -08001267
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01001268 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001269 cd_dbg(CD_CLOSE, "Unlocking door!\n");
Borislav Petkov35841f72008-02-06 01:38:08 -08001270 cdo->lock_door(cdi, 0);
1271 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 }
Borislav Petkov35841f72008-02-06 01:38:08 -08001273
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
Al Virobbc1cc92007-10-07 17:54:28 -04001275 !(mode & FMODE_NDELAY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276
1277 /*
1278 * flush cache on last write release
1279 */
1280 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1281 cdrom_close_write(cdi);
1282
1283 cdo->release(cdi);
1284 if (cdi->use_count == 0) { /* last process that closes dev*/
1285 if (opened_for_data &&
1286 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1287 cdo->tray_move(cdi, 1);
1288 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289}
1290
1291static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1292 struct cdrom_changer_info *buf)
1293{
1294 struct packet_command cgc;
Kees Cook853fe1b2017-02-13 16:25:26 -08001295 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 int length;
1297
1298 /*
1299 * Sanyo changer isn't spec compliant (doesn't use regular change
1300 * LOAD_UNLOAD command, and it doesn't implement the mech status
1301 * command below
1302 */
1303 if (cdi->sanyo_slot) {
1304 buf->hdr.nslots = 3;
1305 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1306 for (length = 0; length < 3; length++) {
1307 buf->slots[length].disc_present = 1;
1308 buf->slots[length].change = 0;
1309 }
1310 return 0;
1311 }
1312
1313 length = sizeof(struct cdrom_mechstat_header) +
1314 cdi->capacity * sizeof(struct cdrom_slot);
1315
1316 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1317 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1318 cgc.cmd[8] = (length >> 8) & 0xff;
1319 cgc.cmd[9] = length & 0xff;
1320 return cdo->generic_packet(cdi, &cgc);
1321}
1322
1323static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1324{
1325 struct cdrom_changer_info *info;
1326 int ret;
1327
Joe Perches5944b2c2014-05-04 17:05:02 -07001328 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 if (cdi->sanyo_slot)
1330 return CDS_NO_INFO;
1331
1332 info = kmalloc(sizeof(*info), GFP_KERNEL);
1333 if (!info)
1334 return -ENOMEM;
1335
1336 if ((ret = cdrom_read_mech_status(cdi, info)))
1337 goto out_free;
1338
1339 if (info->slots[slot].disc_present)
1340 ret = CDS_DISC_OK;
1341 else
1342 ret = CDS_NO_DISC;
1343
1344out_free:
1345 kfree(info);
1346 return ret;
1347}
1348
1349/* Return the number of slots for an ATAPI/SCSI cdrom,
1350 * return 1 if not a changer.
1351 */
1352int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1353{
1354 int status;
1355 int nslots = 1;
1356 struct cdrom_changer_info *info;
1357
Joe Perches5944b2c2014-05-04 17:05:02 -07001358 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359 /* cdrom_read_mech_status requires a valid value for capacity: */
1360 cdi->capacity = 0;
1361
1362 info = kmalloc(sizeof(*info), GFP_KERNEL);
1363 if (!info)
1364 return -ENOMEM;
1365
1366 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1367 nslots = info->hdr.nslots;
1368
1369 kfree(info);
1370 return nslots;
1371}
1372
1373
1374/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1375static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1376{
1377 struct packet_command cgc;
1378
Joe Perches5944b2c2014-05-04 17:05:02 -07001379 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 if (cdi->sanyo_slot && slot < 0)
1381 return 0;
1382
1383 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1384 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1385 cgc.cmd[4] = 2 + (slot >= 0);
1386 cgc.cmd[8] = slot;
1387 cgc.timeout = 60 * HZ;
1388
1389 /* The Sanyo 3 CD changer uses byte 7 of the
1390 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1391 using the GPCMD_LOAD_UNLOAD opcode. */
1392 if (cdi->sanyo_slot && -1 < slot) {
1393 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1394 cgc.cmd[7] = slot;
1395 cgc.cmd[4] = cgc.cmd[8] = 0;
1396 cdi->sanyo_slot = slot ? slot : 3;
1397 }
1398
1399 return cdi->ops->generic_packet(cdi, &cgc);
1400}
1401
1402static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1403{
1404 struct cdrom_changer_info *info;
1405 int curslot;
1406 int ret;
1407
Joe Perches5944b2c2014-05-04 17:05:02 -07001408 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 if (!CDROM_CAN(CDC_SELECT_DISC))
1410 return -EDRIVE_CANT_DO_THIS;
1411
Tejun Heo2d921722010-12-08 20:57:38 +01001412 if (cdi->ops->check_events)
1413 cdi->ops->check_events(cdi, 0, slot);
1414 else
1415 cdi->ops->media_changed(cdi, slot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416
1417 if (slot == CDSL_NONE) {
1418 /* set media changed bits, on both queues */
1419 cdi->mc_flags = 0x3;
1420 return cdrom_load_unload(cdi, -1);
1421 }
1422
1423 info = kmalloc(sizeof(*info), GFP_KERNEL);
1424 if (!info)
1425 return -ENOMEM;
1426
1427 if ((ret = cdrom_read_mech_status(cdi, info))) {
1428 kfree(info);
1429 return ret;
1430 }
1431
1432 curslot = info->hdr.curslot;
1433 kfree(info);
1434
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01001435 if (cdi->use_count > 1 || cdi->keeplocked) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436 if (slot == CDSL_CURRENT) {
1437 return curslot;
1438 } else {
1439 return -EBUSY;
1440 }
1441 }
1442
1443 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1444 which is useful if it had been previously unloaded.
1445 Whether it can or not, it returns the current slot.
1446 Similarly, if slot happens to be the current one, we still
1447 try and load it. */
1448 if (slot == CDSL_CURRENT)
1449 slot = curslot;
1450
1451 /* set media changed bits on both queues */
1452 cdi->mc_flags = 0x3;
1453 if ((ret = cdrom_load_unload(cdi, slot)))
1454 return ret;
1455
1456 return slot;
1457}
1458
Tejun Heo2d921722010-12-08 20:57:38 +01001459/*
1460 * As cdrom implements an extra ioctl consumer for media changed
1461 * event, it needs to buffer ->check_events() output, such that event
1462 * is not lost for both the usual VFS and ioctl paths.
1463 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1464 * path.
1465 *
1466 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1467 * called in parallel and buffering fields are accessed without any
1468 * exclusion. The original media_changed code had the same problem.
1469 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1470 * and remove this cruft altogether. It doesn't have much usefulness
1471 * at this point.
1472 */
1473static void cdrom_update_events(struct cdrom_device_info *cdi,
1474 unsigned int clearing)
1475{
1476 unsigned int events;
1477
1478 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1479 cdi->vfs_events |= events;
1480 cdi->ioctl_events |= events;
1481}
1482
1483unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1484 unsigned int clearing)
1485{
1486 unsigned int events;
1487
1488 cdrom_update_events(cdi, clearing);
1489 events = cdi->vfs_events;
1490 cdi->vfs_events = 0;
1491 return events;
1492}
Jens Axboe30a7caa2010-12-16 17:58:50 +01001493EXPORT_SYMBOL(cdrom_check_events);
Tejun Heo2d921722010-12-08 20:57:38 +01001494
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495/* We want to make media_changed accessible to the user through an
1496 * ioctl. The main problem now is that we must double-buffer the
1497 * low-level implementation, to assure that the VFS and the user both
1498 * see a medium change once.
1499 */
1500
1501static
1502int media_changed(struct cdrom_device_info *cdi, int queue)
1503{
1504 unsigned int mask = (1 << (queue & 1));
1505 int ret = !!(cdi->mc_flags & mask);
Tejun Heo2d921722010-12-08 20:57:38 +01001506 bool changed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507
1508 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
Tejun Heo2d921722010-12-08 20:57:38 +01001509 return ret;
1510
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 /* changed since last call? */
Tejun Heo2d921722010-12-08 20:57:38 +01001512 if (cdi->ops->check_events) {
1513 BUG_ON(!queue); /* shouldn't be called from VFS path */
1514 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1515 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1516 cdi->ioctl_events = 0;
1517 } else
1518 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1519
1520 if (changed) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 cdi->mc_flags = 0x3; /* set bit on both queues */
1522 ret |= 1;
1523 cdi->media_written = 0;
1524 }
Tejun Heo2d921722010-12-08 20:57:38 +01001525
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526 cdi->mc_flags &= ~mask; /* clear bit */
1527 return ret;
1528}
1529
1530int cdrom_media_changed(struct cdrom_device_info *cdi)
1531{
1532 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1533 * Returning "0" is always safe (media hasn't been changed). Do that
1534 * if the low-level cdrom driver dosn't support media changed. */
1535 if (cdi == NULL || cdi->ops->media_changed == NULL)
1536 return 0;
1537 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1538 return 0;
1539 return media_changed(cdi, 0);
1540}
1541
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542/* Requests to the low-level drivers will /always/ be done in the
1543 following format convention:
1544
1545 CDROM_LBA: all data-related requests.
1546 CDROM_MSF: all audio-related requests.
1547
1548 However, a low-level implementation is allowed to refuse this
1549 request, and return information in its own favorite format.
1550
1551 It doesn't make sense /at all/ to ask for a play_audio in LBA
1552 format, or ask for multi-session info in MSF format. However, for
1553 backward compatibility these format requests will be satisfied, but
1554 the requests to the low-level drivers will be sanitized in the more
1555 meaningful format indicated above.
1556 */
1557
1558static
1559void sanitize_format(union cdrom_addr *addr,
1560 u_char * curr, u_char requested)
1561{
1562 if (*curr == requested)
1563 return; /* nothing to be done! */
1564 if (requested == CDROM_LBA) {
1565 addr->lba = (int) addr->msf.frame +
1566 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1567 } else { /* CDROM_MSF */
1568 int lba = addr->lba;
1569 addr->msf.frame = lba % 75;
1570 lba /= 75;
1571 lba += 2;
1572 addr->msf.second = lba % 60;
1573 addr->msf.minute = lba / 60;
1574 }
1575 *curr = requested;
1576}
1577
1578void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1579 int type)
1580{
1581 memset(cgc, 0, sizeof(struct packet_command));
1582 if (buf)
1583 memset(buf, 0, len);
1584 cgc->buffer = (char *) buf;
1585 cgc->buflen = len;
1586 cgc->data_direction = type;
Jens Axboe2e11c202007-01-03 08:10:35 +01001587 cgc->timeout = CDROM_DEF_TIMEOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588}
1589
1590/* DVD handling */
1591
1592#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1593#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1594
1595static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1596{
1597 cgc->cmd[0] = GPCMD_REPORT_KEY;
1598 cgc->cmd[10] = type | (agid << 6);
1599 switch (type) {
1600 case 0: case 8: case 5: {
1601 cgc->buflen = 8;
1602 break;
1603 }
1604 case 1: {
1605 cgc->buflen = 16;
1606 break;
1607 }
1608 case 2: case 4: {
1609 cgc->buflen = 12;
1610 break;
1611 }
1612 }
1613 cgc->cmd[9] = cgc->buflen;
1614 cgc->data_direction = CGC_DATA_READ;
1615}
1616
1617static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1618{
1619 cgc->cmd[0] = GPCMD_SEND_KEY;
1620 cgc->cmd[10] = type | (agid << 6);
1621 switch (type) {
1622 case 1: {
1623 cgc->buflen = 16;
1624 break;
1625 }
1626 case 3: {
1627 cgc->buflen = 12;
1628 break;
1629 }
1630 case 6: {
1631 cgc->buflen = 8;
1632 break;
1633 }
1634 }
1635 cgc->cmd[9] = cgc->buflen;
1636 cgc->data_direction = CGC_DATA_WRITE;
1637}
1638
1639static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1640{
1641 int ret;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001642 u_char buf[20];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 struct packet_command cgc;
Kees Cook853fe1b2017-02-13 16:25:26 -08001644 const struct cdrom_device_ops *cdo = cdi->ops;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001645 rpc_state_t rpc_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001647 memset(buf, 0, sizeof(buf));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1649
1650 switch (ai->type) {
1651 /* LU data send */
1652 case DVD_LU_SEND_AGID:
Joe Perches5944b2c2014-05-04 17:05:02 -07001653 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654 cgc.quiet = 1;
1655 setup_report_key(&cgc, ai->lsa.agid, 0);
1656
1657 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001658 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659
1660 ai->lsa.agid = buf[7] >> 6;
1661 /* Returning data, let host change state */
1662 break;
1663
1664 case DVD_LU_SEND_KEY1:
Joe Perches5944b2c2014-05-04 17:05:02 -07001665 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666 setup_report_key(&cgc, ai->lsk.agid, 2);
1667
1668 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001669 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670
1671 copy_key(ai->lsk.key, &buf[4]);
1672 /* Returning data, let host change state */
1673 break;
1674
1675 case DVD_LU_SEND_CHALLENGE:
Joe Perches5944b2c2014-05-04 17:05:02 -07001676 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 setup_report_key(&cgc, ai->lsc.agid, 1);
1678
1679 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001680 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681
1682 copy_chal(ai->lsc.chal, &buf[4]);
1683 /* Returning data, let host change state */
1684 break;
1685
1686 /* Post-auth key */
1687 case DVD_LU_SEND_TITLE_KEY:
Joe Perches5944b2c2014-05-04 17:05:02 -07001688 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 cgc.quiet = 1;
1690 setup_report_key(&cgc, ai->lstk.agid, 4);
1691 cgc.cmd[5] = ai->lstk.lba;
1692 cgc.cmd[4] = ai->lstk.lba >> 8;
1693 cgc.cmd[3] = ai->lstk.lba >> 16;
1694 cgc.cmd[2] = ai->lstk.lba >> 24;
1695
1696 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001697 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698
1699 ai->lstk.cpm = (buf[4] >> 7) & 1;
1700 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1701 ai->lstk.cgms = (buf[4] >> 4) & 3;
1702 copy_key(ai->lstk.title_key, &buf[5]);
1703 /* Returning data, let host change state */
1704 break;
1705
1706 case DVD_LU_SEND_ASF:
Joe Perches5944b2c2014-05-04 17:05:02 -07001707 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708 setup_report_key(&cgc, ai->lsasf.agid, 5);
1709
1710 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001711 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712
1713 ai->lsasf.asf = buf[7] & 1;
1714 break;
1715
1716 /* LU data receive (LU changes state) */
1717 case DVD_HOST_SEND_CHALLENGE:
Joe Perches5944b2c2014-05-04 17:05:02 -07001718 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719 setup_send_key(&cgc, ai->hsc.agid, 1);
1720 buf[1] = 0xe;
1721 copy_chal(&buf[4], ai->hsc.chal);
1722
1723 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001724 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725
1726 ai->type = DVD_LU_SEND_KEY1;
1727 break;
1728
1729 case DVD_HOST_SEND_KEY2:
Joe Perches5944b2c2014-05-04 17:05:02 -07001730 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 setup_send_key(&cgc, ai->hsk.agid, 3);
1732 buf[1] = 0xa;
1733 copy_key(&buf[4], ai->hsk.key);
1734
1735 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1736 ai->type = DVD_AUTH_FAILURE;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001737 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738 }
1739 ai->type = DVD_AUTH_ESTABLISHED;
1740 break;
1741
1742 /* Misc */
1743 case DVD_INVALIDATE_AGID:
1744 cgc.quiet = 1;
Joe Perches5944b2c2014-05-04 17:05:02 -07001745 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1747 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001748 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749 break;
1750
1751 /* Get region settings */
1752 case DVD_LU_SEND_RPC_STATE:
Joe Perches5944b2c2014-05-04 17:05:02 -07001753 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 setup_report_key(&cgc, 0, 8);
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001755 memset(&rpc_state, 0, sizeof(rpc_state_t));
1756 cgc.buffer = (char *) &rpc_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757
1758 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001759 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001761 ai->lrpcs.type = rpc_state.type_code;
1762 ai->lrpcs.vra = rpc_state.vra;
1763 ai->lrpcs.ucca = rpc_state.ucca;
1764 ai->lrpcs.region_mask = rpc_state.region_mask;
1765 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766 break;
1767
1768 /* Set region settings */
1769 case DVD_HOST_SEND_RPC_STATE:
Joe Perches5944b2c2014-05-04 17:05:02 -07001770 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 setup_send_key(&cgc, 0, 6);
1772 buf[1] = 6;
1773 buf[4] = ai->hrpcs.pdrc;
1774
1775 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001776 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 break;
1778
1779 default:
Joe Perches5944b2c2014-05-04 17:05:02 -07001780 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001781 return -ENOTTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 }
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001783
1784 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785}
1786
Marcin Slusarzd1941392008-11-16 19:06:37 +01001787static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1788 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789{
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001790 unsigned char buf[21], *base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791 struct dvd_layer *layer;
Kees Cook853fe1b2017-02-13 16:25:26 -08001792 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 int ret, layer_num = s->physical.layer_num;
1794
1795 if (layer_num >= DVD_LAYERS)
1796 return -EINVAL;
1797
Marcin Slusarzd1941392008-11-16 19:06:37 +01001798 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1799 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1800 cgc->cmd[6] = layer_num;
1801 cgc->cmd[7] = s->type;
1802 cgc->cmd[9] = cgc->buflen & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803
1804 /*
1805 * refrain from reporting errors on non-existing layers (mainly)
1806 */
Marcin Slusarzd1941392008-11-16 19:06:37 +01001807 cgc->quiet = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808
Marcin Slusarzd1941392008-11-16 19:06:37 +01001809 ret = cdo->generic_packet(cdi, cgc);
1810 if (ret)
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001811 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812
1813 base = &buf[4];
1814 layer = &s->physical.layer[layer_num];
1815
1816 /*
1817 * place the data... really ugly, but at least we won't have to
1818 * worry about endianess in userspace.
1819 */
1820 memset(layer, 0, sizeof(*layer));
1821 layer->book_version = base[0] & 0xf;
1822 layer->book_type = base[0] >> 4;
1823 layer->min_rate = base[1] & 0xf;
1824 layer->disc_size = base[1] >> 4;
1825 layer->layer_type = base[2] & 0xf;
1826 layer->track_path = (base[2] >> 4) & 1;
1827 layer->nlayers = (base[2] >> 5) & 3;
1828 layer->track_density = base[3] & 0xf;
1829 layer->linear_density = base[3] >> 4;
1830 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1831 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1832 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1833 layer->bca = base[16] >> 7;
1834
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001835 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836}
1837
Marcin Slusarzd1941392008-11-16 19:06:37 +01001838static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1839 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840{
1841 int ret;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001842 u_char buf[8];
Kees Cook853fe1b2017-02-13 16:25:26 -08001843 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844
Marcin Slusarzd1941392008-11-16 19:06:37 +01001845 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1846 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1847 cgc->cmd[6] = s->copyright.layer_num;
1848 cgc->cmd[7] = s->type;
1849 cgc->cmd[8] = cgc->buflen >> 8;
1850 cgc->cmd[9] = cgc->buflen & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851
Marcin Slusarzd1941392008-11-16 19:06:37 +01001852 ret = cdo->generic_packet(cdi, cgc);
1853 if (ret)
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001854 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855
1856 s->copyright.cpst = buf[4];
1857 s->copyright.rmi = buf[5];
1858
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001859 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860}
1861
Marcin Slusarzd1941392008-11-16 19:06:37 +01001862static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1863 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864{
1865 int ret, size;
1866 u_char *buf;
Kees Cook853fe1b2017-02-13 16:25:26 -08001867 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868
1869 size = sizeof(s->disckey.value) + 4;
1870
Marcin Slusarzd1941392008-11-16 19:06:37 +01001871 buf = kmalloc(size, GFP_KERNEL);
1872 if (!buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873 return -ENOMEM;
1874
Marcin Slusarzd1941392008-11-16 19:06:37 +01001875 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1876 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1877 cgc->cmd[7] = s->type;
1878 cgc->cmd[8] = size >> 8;
1879 cgc->cmd[9] = size & 0xff;
1880 cgc->cmd[10] = s->disckey.agid << 6;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881
Marcin Slusarzd1941392008-11-16 19:06:37 +01001882 ret = cdo->generic_packet(cdi, cgc);
1883 if (!ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1885
1886 kfree(buf);
1887 return ret;
1888}
1889
Marcin Slusarzd1941392008-11-16 19:06:37 +01001890static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1891 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892{
Marcin Slusarzd1941392008-11-16 19:06:37 +01001893 int ret, size = 4 + 188;
1894 u_char *buf;
Kees Cook853fe1b2017-02-13 16:25:26 -08001895 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896
Marcin Slusarzd1941392008-11-16 19:06:37 +01001897 buf = kmalloc(size, GFP_KERNEL);
1898 if (!buf)
1899 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900
Marcin Slusarzd1941392008-11-16 19:06:37 +01001901 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1902 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1903 cgc->cmd[7] = s->type;
1904 cgc->cmd[9] = cgc->buflen & 0xff;
1905
1906 ret = cdo->generic_packet(cdi, cgc);
1907 if (ret)
1908 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909
1910 s->bca.len = buf[0] << 8 | buf[1];
1911 if (s->bca.len < 12 || s->bca.len > 188) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001912 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1913 s->bca.len);
Marcin Slusarzd1941392008-11-16 19:06:37 +01001914 ret = -EIO;
1915 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 }
1917 memcpy(s->bca.value, &buf[4], s->bca.len);
Marcin Slusarzd1941392008-11-16 19:06:37 +01001918 ret = 0;
1919out:
1920 kfree(buf);
1921 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922}
1923
Marcin Slusarzd1941392008-11-16 19:06:37 +01001924static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1925 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926{
1927 int ret = 0, size;
1928 u_char *buf;
Kees Cook853fe1b2017-02-13 16:25:26 -08001929 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930
1931 size = sizeof(s->manufact.value) + 4;
1932
Marcin Slusarzd1941392008-11-16 19:06:37 +01001933 buf = kmalloc(size, GFP_KERNEL);
1934 if (!buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 return -ENOMEM;
1936
Marcin Slusarzd1941392008-11-16 19:06:37 +01001937 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1938 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1939 cgc->cmd[7] = s->type;
1940 cgc->cmd[8] = size >> 8;
1941 cgc->cmd[9] = size & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942
Marcin Slusarzd1941392008-11-16 19:06:37 +01001943 ret = cdo->generic_packet(cdi, cgc);
1944 if (ret)
1945 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946
1947 s->manufact.len = buf[0] << 8 | buf[1];
Andrew Mortonaec9f372011-08-02 12:43:50 +02001948 if (s->manufact.len < 0) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001949 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1950 s->manufact.len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 ret = -EIO;
1952 } else {
Andrew Mortonaec9f372011-08-02 12:43:50 +02001953 if (s->manufact.len > 2048) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001954 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1955 s->manufact.len);
Andrew Mortonaec9f372011-08-02 12:43:50 +02001956 s->manufact.len = 2048;
1957 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1959 }
1960
Marcin Slusarzd1941392008-11-16 19:06:37 +01001961out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 kfree(buf);
1963 return ret;
1964}
1965
Marcin Slusarzd1941392008-11-16 19:06:37 +01001966static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1967 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968{
1969 switch (s->type) {
1970 case DVD_STRUCT_PHYSICAL:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001971 return dvd_read_physical(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972
1973 case DVD_STRUCT_COPYRIGHT:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001974 return dvd_read_copyright(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975
1976 case DVD_STRUCT_DISCKEY:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001977 return dvd_read_disckey(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978
1979 case DVD_STRUCT_BCA:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001980 return dvd_read_bca(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981
1982 case DVD_STRUCT_MANUFACT:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001983 return dvd_read_manufact(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984
1985 default:
Joe Perches5944b2c2014-05-04 17:05:02 -07001986 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1987 s->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988 return -EINVAL;
1989 }
1990}
1991
1992int cdrom_mode_sense(struct cdrom_device_info *cdi,
1993 struct packet_command *cgc,
1994 int page_code, int page_control)
1995{
Kees Cook853fe1b2017-02-13 16:25:26 -08001996 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997
1998 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1999
2000 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
2001 cgc->cmd[2] = page_code | (page_control << 6);
2002 cgc->cmd[7] = cgc->buflen >> 8;
2003 cgc->cmd[8] = cgc->buflen & 0xff;
2004 cgc->data_direction = CGC_DATA_READ;
2005 return cdo->generic_packet(cdi, cgc);
2006}
2007
2008int cdrom_mode_select(struct cdrom_device_info *cdi,
2009 struct packet_command *cgc)
2010{
Kees Cook853fe1b2017-02-13 16:25:26 -08002011 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012
2013 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2014 memset(cgc->buffer, 0, 2);
2015 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2016 cgc->cmd[1] = 0x10; /* PF */
2017 cgc->cmd[7] = cgc->buflen >> 8;
2018 cgc->cmd[8] = cgc->buflen & 0xff;
2019 cgc->data_direction = CGC_DATA_WRITE;
2020 return cdo->generic_packet(cdi, cgc);
2021}
2022
2023static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2024 struct cdrom_subchnl *subchnl, int mcn)
2025{
Kees Cook853fe1b2017-02-13 16:25:26 -08002026 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02002028 char buffer[32];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029 int ret;
2030
2031 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2032 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
vchannaiahbf294e82016-06-29 08:18:25 -04002033 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034 cgc.cmd[2] = 0x40; /* request subQ data */
2035 cgc.cmd[3] = mcn ? 2 : 1;
2036 cgc.cmd[8] = 16;
2037
2038 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02002039 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040
2041 subchnl->cdsc_audiostatus = cgc.buffer[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2043 subchnl->cdsc_trk = cgc.buffer[6];
2044 subchnl->cdsc_ind = cgc.buffer[7];
2045
vchannaiahbf294e82016-06-29 08:18:25 -04002046 if (subchnl->cdsc_format == CDROM_LBA) {
2047 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2048 (cgc.buffer[9] << 16) |
2049 (cgc.buffer[10] << 8) |
2050 (cgc.buffer[11]));
2051 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2052 (cgc.buffer[13] << 16) |
2053 (cgc.buffer[14] << 8) |
2054 (cgc.buffer[15]));
2055 } else {
2056 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2057 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2058 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2059 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2060 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2061 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2062 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063
FUJITA Tomonorifce53842008-07-04 09:33:01 +02002064 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065}
2066
2067/*
2068 * Specific READ_10 interface
2069 */
2070static int cdrom_read_cd(struct cdrom_device_info *cdi,
2071 struct packet_command *cgc, int lba,
2072 int blocksize, int nblocks)
2073{
Kees Cook853fe1b2017-02-13 16:25:26 -08002074 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075
2076 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2077 cgc->cmd[0] = GPCMD_READ_10;
2078 cgc->cmd[2] = (lba >> 24) & 0xff;
2079 cgc->cmd[3] = (lba >> 16) & 0xff;
2080 cgc->cmd[4] = (lba >> 8) & 0xff;
2081 cgc->cmd[5] = lba & 0xff;
2082 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2083 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2084 cgc->cmd[8] = nblocks & 0xff;
2085 cgc->buflen = blocksize * nblocks;
2086 return cdo->generic_packet(cdi, cgc);
2087}
2088
2089/* very generic interface for reading the various types of blocks */
2090static int cdrom_read_block(struct cdrom_device_info *cdi,
2091 struct packet_command *cgc,
2092 int lba, int nblocks, int format, int blksize)
2093{
Kees Cook853fe1b2017-02-13 16:25:26 -08002094 const struct cdrom_device_ops *cdo = cdi->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095
2096 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2097 cgc->cmd[0] = GPCMD_READ_CD;
2098 /* expected sector size - cdda,mode1,etc. */
2099 cgc->cmd[1] = format << 2;
2100 /* starting address */
2101 cgc->cmd[2] = (lba >> 24) & 0xff;
2102 cgc->cmd[3] = (lba >> 16) & 0xff;
2103 cgc->cmd[4] = (lba >> 8) & 0xff;
2104 cgc->cmd[5] = lba & 0xff;
2105 /* number of blocks */
2106 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2107 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2108 cgc->cmd[8] = nblocks & 0xff;
2109 cgc->buflen = blksize * nblocks;
2110
2111 /* set the header info returned */
2112 switch (blksize) {
2113 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2114 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2115 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2116 default : cgc->cmd[9] = 0x10;
2117 }
2118
2119 return cdo->generic_packet(cdi, cgc);
2120}
2121
2122static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2123 int lba, int nframes)
2124{
2125 struct packet_command cgc;
2126 int ret = 0;
2127 int nr;
2128
2129 cdi->last_sense = 0;
2130
2131 memset(&cgc, 0, sizeof(cgc));
2132
2133 /*
2134 * start with will ra.nframes size, back down if alloc fails
2135 */
2136 nr = nframes;
2137 do {
2138 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2139 if (cgc.buffer)
2140 break;
2141
2142 nr >>= 1;
2143 } while (nr);
2144
2145 if (!nr)
2146 return -ENOMEM;
2147
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148 cgc.data_direction = CGC_DATA_READ;
2149 while (nframes > 0) {
2150 if (nr > nframes)
2151 nr = nframes;
2152
2153 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2154 if (ret)
2155 break;
Dan Carpenter822bfa52012-02-06 10:20:45 +01002156 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157 ret = -EFAULT;
2158 break;
2159 }
2160 ubuf += CD_FRAMESIZE_RAW * nr;
2161 nframes -= nr;
2162 lba += nr;
2163 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164 kfree(cgc.buffer);
2165 return ret;
2166}
2167
2168static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2169 int lba, int nframes)
2170{
Jens Axboe165125e2007-07-24 09:28:11 +02002171 struct request_queue *q = cdi->disk->queue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172 struct request *rq;
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01002173 struct scsi_request *req;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174 struct bio *bio;
2175 unsigned int len;
2176 int nr, ret = 0;
2177
2178 if (!q)
2179 return -ENXIO;
2180
Bart Van Assche73d17702017-05-31 14:43:49 -07002181 if (!blk_queue_scsi_passthrough(q)) {
2182 WARN_ONCE(true,
2183 "Attempt read CDDA info through a non-SCSI queue\n");
2184 return -EINVAL;
2185 }
2186
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 cdi->last_sense = 0;
2188
2189 while (nframes) {
2190 nr = nframes;
2191 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2192 nr = 1;
Martin K. Petersenae03bf62009-05-22 17:17:50 -04002193 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2194 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195
2196 len = nr * CD_FRAMESIZE_RAW;
2197
Christoph Hellwigaebf5262017-01-31 16:57:31 +01002198 rq = blk_get_request(q, REQ_OP_SCSI_IN, GFP_KERNEL);
Joe Lawrencea492f072014-08-28 08:15:21 -06002199 if (IS_ERR(rq)) {
2200 ret = PTR_ERR(rq);
Jens Axboedd1cab92005-06-20 14:06:01 +02002201 break;
Alan D. Brunellefebd7a52008-12-09 15:52:15 +01002202 }
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01002203 req = scsi_req(rq);
Alan D. Brunellefebd7a52008-12-09 15:52:15 +01002204
2205 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2206 if (ret) {
2207 blk_put_request(rq);
2208 break;
2209 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01002211 req->cmd[0] = GPCMD_READ_CD;
2212 req->cmd[1] = 1 << 2;
2213 req->cmd[2] = (lba >> 24) & 0xff;
2214 req->cmd[3] = (lba >> 16) & 0xff;
2215 req->cmd[4] = (lba >> 8) & 0xff;
2216 req->cmd[5] = lba & 0xff;
2217 req->cmd[6] = (nr >> 16) & 0xff;
2218 req->cmd[7] = (nr >> 8) & 0xff;
2219 req->cmd[8] = nr & 0xff;
2220 req->cmd[9] = 0xf8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01002222 req->cmd_len = 12;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223 rq->timeout = 60 * HZ;
2224 bio = rq->bio;
2225
Christoph Hellwigb7819b92017-04-20 16:02:55 +02002226 blk_execute_rq(q, cdi->disk, rq, 0);
Christoph Hellwig17d53632017-04-20 16:03:01 +02002227 if (scsi_req(rq)->result) {
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01002228 struct request_sense *s = req->sense;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 ret = -EIO;
2230 cdi->last_sense = s->sense_key;
2231 }
2232
Jens Axboe8e5cfc42006-12-19 11:12:46 +01002233 if (blk_rq_unmap_user(bio))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234 ret = -EFAULT;
Alan D. Brunellefebd7a52008-12-09 15:52:15 +01002235 blk_put_request(rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236
2237 if (ret)
2238 break;
2239
2240 nframes -= nr;
2241 lba += nr;
2242 ubuf += len;
2243 }
2244
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245 return ret;
2246}
2247
2248static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2249 int lba, int nframes)
2250{
2251 int ret;
2252
2253 if (cdi->cdda_method == CDDA_OLD)
2254 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2255
2256retry:
2257 /*
2258 * for anything else than success and io error, we need to retry
2259 */
2260 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2261 if (!ret || ret != -EIO)
2262 return ret;
2263
2264 /*
2265 * I've seen drives get sense 4/8/3 udma crc errors on multi
2266 * frame dma, so drop to single frame dma if we need to
2267 */
2268 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
Joe Perchese597cd02010-07-01 08:24:32 +02002269 pr_info("dropping to single frame dma\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270 cdi->cdda_method = CDDA_BPC_SINGLE;
2271 goto retry;
2272 }
2273
2274 /*
2275 * so we have an io error of some sort with multi frame dma. if the
2276 * condition wasn't a hardware error
2277 * problems, not for any error
2278 */
2279 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2280 return ret;
2281
Joe Perchese597cd02010-07-01 08:24:32 +02002282 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283 cdi->cdda_method = CDDA_OLD;
2284 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2285}
2286
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002287static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2288 void __user *argp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289{
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002290 struct cdrom_multisession ms_info;
2291 u8 requested_format;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292 int ret;
2293
Joe Perches5944b2c2014-05-04 17:05:02 -07002294 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002295
2296 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2297 return -ENOSYS;
2298
2299 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2300 return -EFAULT;
2301
2302 requested_format = ms_info.addr_format;
2303 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2304 return -EINVAL;
2305 ms_info.addr_format = CDROM_LBA;
2306
2307 ret = cdi->ops->get_last_session(cdi, &ms_info);
2308 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309 return ret;
2310
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002311 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2312
2313 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2314 return -EFAULT;
2315
Joe Perches5944b2c2014-05-04 17:05:02 -07002316 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002317 return 0;
2318}
2319
2320static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2321{
Joe Perches5944b2c2014-05-04 17:05:02 -07002322 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002323
2324 if (!CDROM_CAN(CDC_OPEN_TRAY))
2325 return -ENOSYS;
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01002326 if (cdi->use_count != 1 || cdi->keeplocked)
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002327 return -EBUSY;
2328 if (CDROM_CAN(CDC_LOCK)) {
2329 int ret = cdi->ops->lock_door(cdi, 0);
2330 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 return ret;
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002332 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002334 return cdi->ops->tray_move(cdi, 1);
2335}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002336
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002337static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2338{
Joe Perches5944b2c2014-05-04 17:05:02 -07002339 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002341 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2342 return -ENOSYS;
2343 return cdi->ops->tray_move(cdi, 0);
2344}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002346static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2347 unsigned long arg)
2348{
Joe Perches5944b2c2014-05-04 17:05:02 -07002349 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002351 if (!CDROM_CAN(CDC_OPEN_TRAY))
2352 return -ENOSYS;
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01002353 if (cdi->keeplocked)
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002354 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002356 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2357 if (arg)
2358 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2359 return 0;
2360}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002362static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2363 unsigned long arg)
2364{
2365 struct cdrom_changer_info *info;
2366 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367
Joe Perches5944b2c2014-05-04 17:05:02 -07002368 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002370 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2371 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002372
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002373 /* cannot select disc or select current disc */
2374 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2375 return media_changed(cdi, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002377 if ((unsigned int)arg >= cdi->capacity)
2378 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002380 info = kmalloc(sizeof(*info), GFP_KERNEL);
2381 if (!info)
2382 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002383
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002384 ret = cdrom_read_mech_status(cdi, info);
2385 if (!ret)
2386 ret = info->slots[arg].change;
2387 kfree(info);
2388 return ret;
2389}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002391static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2392 unsigned long arg)
2393{
Joe Perches5944b2c2014-05-04 17:05:02 -07002394 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002396 /*
2397 * Options need to be in sync with capability.
2398 * Too late for that, so we have to check each one separately.
2399 */
2400 switch (arg) {
2401 case CDO_USE_FFLAGS:
2402 case CDO_CHECK_TYPE:
2403 break;
2404 case CDO_LOCK:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405 if (!CDROM_CAN(CDC_LOCK))
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002406 return -ENOSYS;
2407 break;
2408 case 0:
2409 return cdi->options;
2410 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2411 default:
2412 if (!CDROM_CAN(arg))
2413 return -ENOSYS;
2414 }
2415 cdi->options |= (int) arg;
2416 return cdi->options;
2417}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002419static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2420 unsigned long arg)
2421{
Joe Perches5944b2c2014-05-04 17:05:02 -07002422 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002424 cdi->options &= ~(int) arg;
2425 return cdi->options;
2426}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002428static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2429 unsigned long arg)
2430{
Joe Perches5944b2c2014-05-04 17:05:02 -07002431 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002432
2433 if (!CDROM_CAN(CDC_SELECT_SPEED))
2434 return -ENOSYS;
2435 return cdi->ops->select_speed(cdi, arg);
2436}
2437
2438static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2439 unsigned long arg)
2440{
Joe Perches5944b2c2014-05-04 17:05:02 -07002441 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002442
2443 if (!CDROM_CAN(CDC_SELECT_DISC))
2444 return -ENOSYS;
2445
2446 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2447 if ((int)arg >= cdi->capacity)
2448 return -EINVAL;
2449 }
2450
2451 /*
2452 * ->select_disc is a hook to allow a driver-specific way of
2453 * seleting disc. However, since there is no equivalent hook for
2454 * cdrom_slot_status this may not actually be useful...
2455 */
2456 if (cdi->ops->select_disc)
2457 return cdi->ops->select_disc(cdi, arg);
2458
Joe Perches5944b2c2014-05-04 17:05:02 -07002459 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002460 return cdrom_select_disc(cdi, arg);
2461}
2462
2463static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2464 struct block_device *bdev)
2465{
Joe Perches5944b2c2014-05-04 17:05:02 -07002466 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002467
2468 if (!capable(CAP_SYS_ADMIN))
2469 return -EACCES;
2470 if (!CDROM_CAN(CDC_RESET))
2471 return -ENOSYS;
Peter Zijlstraf98393a2007-05-06 14:49:54 -07002472 invalidate_bdev(bdev);
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002473 return cdi->ops->reset(cdi);
2474}
2475
2476static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2477 unsigned long arg)
2478{
Joe Perches5944b2c2014-05-04 17:05:02 -07002479 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002480
2481 if (!CDROM_CAN(CDC_LOCK))
2482 return -EDRIVE_CANT_DO_THIS;
2483
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01002484 cdi->keeplocked = arg ? 1 : 0;
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002485
2486 /*
2487 * Don't unlock the door on multiple opens by default, but allow
2488 * root to do so.
2489 */
2490 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2491 return -EBUSY;
2492 return cdi->ops->lock_door(cdi, arg);
2493}
2494
2495static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2496 unsigned long arg)
2497{
Joe Perches5944b2c2014-05-04 17:05:02 -07002498 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002499
2500 if (!capable(CAP_SYS_ADMIN))
2501 return -EACCES;
2502 debug = arg ? 1 : 0;
2503 return debug;
2504}
2505
2506static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2507{
Joe Perches5944b2c2014-05-04 17:05:02 -07002508 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002509 return (cdi->ops->capability & ~cdi->mask);
2510}
2511
2512/*
2513 * The following function is implemented, although very few audio
Linus Torvalds1da177e2005-04-16 15:20:36 -07002514 * discs give Universal Product Code information, which should just be
2515 * the Medium Catalog Number on the box. Note, that the way the code
2516 * is written on the CD is /not/ uniform across all discs!
2517 */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002518static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2519 void __user *argp)
2520{
2521 struct cdrom_mcn mcn;
2522 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523
Joe Perches5944b2c2014-05-04 17:05:02 -07002524 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002526 if (!(cdi->ops->capability & CDC_MCN))
2527 return -ENOSYS;
2528 ret = cdi->ops->get_mcn(cdi, &mcn);
2529 if (ret)
2530 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002531
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002532 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2533 return -EFAULT;
Joe Perches5944b2c2014-05-04 17:05:02 -07002534 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002535 return 0;
2536}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002538static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2539 unsigned long arg)
2540{
Joe Perches5944b2c2014-05-04 17:05:02 -07002541 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002543 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2544 return -ENOSYS;
2545 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2546 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2547 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2548 if (((int)arg >= cdi->capacity))
2549 return -EINVAL;
2550 return cdrom_slot_status(cdi, arg);
2551}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002553/*
2554 * Ok, this is where problems start. The current interface for the
2555 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002556 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002557 * is often the case, it is also very common for CDs to have some tracks
2558 * with data, and some tracks with audio. Just because I feel like it,
2559 * I declare the following to be the best way to cope. If the CD has ANY
2560 * data tracks on it, it will be returned as a data CD. If it has any XA
2561 * tracks, I will return it as that. Now I could simplify this interface
2562 * by combining these returns with the above, but this more clearly
2563 * demonstrates the problem with the current interface. Too bad this
2564 * wasn't designed to use bitmasks... -Erik
2565 *
2566 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2567 * User level programmers might feel the ioctl is not very useful.
2568 * ---david
2569 */
2570static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2571{
2572 tracktype tracks;
2573
Joe Perches5944b2c2014-05-04 17:05:02 -07002574 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002575
2576 cdrom_count_tracks(cdi, &tracks);
2577 if (tracks.error)
2578 return tracks.error;
2579
2580 /* Policy mode on */
2581 if (tracks.audio > 0) {
2582 if (!tracks.data && !tracks.cdi && !tracks.xa)
2583 return CDS_AUDIO;
2584 else
2585 return CDS_MIXED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002586 }
2587
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002588 if (tracks.cdi > 0)
2589 return CDS_XA_2_2;
2590 if (tracks.xa > 0)
2591 return CDS_XA_2_1;
2592 if (tracks.data > 0)
2593 return CDS_DATA_1;
2594 /* Policy mode off */
2595
Joe Perches5944b2c2014-05-04 17:05:02 -07002596 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002597 return CDS_NO_INFO;
2598}
2599
2600static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2601{
Joe Perches5944b2c2014-05-04 17:05:02 -07002602 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002603 return cdi->capacity;
2604}
2605
2606static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2607 void __user *argp)
2608{
2609 struct cdrom_subchnl q;
2610 u8 requested, back;
2611 int ret;
2612
Joe Perches5944b2c2014-05-04 17:05:02 -07002613 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002614
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002615 if (copy_from_user(&q, argp, sizeof(q)))
2616 return -EFAULT;
2617
2618 requested = q.cdsc_format;
2619 if (requested != CDROM_MSF && requested != CDROM_LBA)
2620 return -EINVAL;
2621 q.cdsc_format = CDROM_MSF;
2622
2623 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2624 if (ret)
2625 return ret;
2626
2627 back = q.cdsc_format; /* local copy */
2628 sanitize_format(&q.cdsc_absaddr, &back, requested);
2629 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2630
2631 if (copy_to_user(argp, &q, sizeof(q)))
2632 return -EFAULT;
Joe Perches5944b2c2014-05-04 17:05:02 -07002633 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002634 return 0;
2635}
2636
2637static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2638 void __user *argp)
2639{
2640 struct cdrom_tochdr header;
2641 int ret;
2642
Joe Perches5944b2c2014-05-04 17:05:02 -07002643 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002644
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002645 if (copy_from_user(&header, argp, sizeof(header)))
2646 return -EFAULT;
2647
2648 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2649 if (ret)
2650 return ret;
2651
2652 if (copy_to_user(argp, &header, sizeof(header)))
2653 return -EFAULT;
Joe Perches5944b2c2014-05-04 17:05:02 -07002654 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002655 return 0;
2656}
2657
2658static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2659 void __user *argp)
2660{
2661 struct cdrom_tocentry entry;
2662 u8 requested_format;
2663 int ret;
2664
Joe Perches5944b2c2014-05-04 17:05:02 -07002665 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002666
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002667 if (copy_from_user(&entry, argp, sizeof(entry)))
2668 return -EFAULT;
2669
2670 requested_format = entry.cdte_format;
2671 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2672 return -EINVAL;
2673 /* make interface to low-level uniform */
2674 entry.cdte_format = CDROM_MSF;
2675 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2676 if (ret)
2677 return ret;
2678 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2679
2680 if (copy_to_user(argp, &entry, sizeof(entry)))
2681 return -EFAULT;
Joe Perches5944b2c2014-05-04 17:05:02 -07002682 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002683 return 0;
2684}
2685
2686static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2687 void __user *argp)
2688{
2689 struct cdrom_msf msf;
2690
Joe Perches5944b2c2014-05-04 17:05:02 -07002691 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002692
2693 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2694 return -ENOSYS;
2695 if (copy_from_user(&msf, argp, sizeof(msf)))
2696 return -EFAULT;
2697 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2698}
2699
2700static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2701 void __user *argp)
2702{
2703 struct cdrom_ti ti;
2704 int ret;
2705
Joe Perches5944b2c2014-05-04 17:05:02 -07002706 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002707
2708 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2709 return -ENOSYS;
2710 if (copy_from_user(&ti, argp, sizeof(ti)))
2711 return -EFAULT;
2712
2713 ret = check_for_audio_disc(cdi, cdi->ops);
2714 if (ret)
2715 return ret;
2716 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2717}
2718static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2719 void __user *argp)
2720{
2721 struct cdrom_volctrl volume;
2722
Joe Perches5944b2c2014-05-04 17:05:02 -07002723 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002724
2725 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2726 return -ENOSYS;
2727 if (copy_from_user(&volume, argp, sizeof(volume)))
2728 return -EFAULT;
2729 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2730}
2731
2732static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2733 void __user *argp)
2734{
2735 struct cdrom_volctrl volume;
2736 int ret;
2737
Joe Perches5944b2c2014-05-04 17:05:02 -07002738 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002739
2740 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2741 return -ENOSYS;
2742
2743 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2744 if (ret)
2745 return ret;
2746
2747 if (copy_to_user(argp, &volume, sizeof(volume)))
2748 return -EFAULT;
2749 return 0;
2750}
2751
2752static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2753 unsigned int cmd)
2754{
2755 int ret;
2756
Joe Perches5944b2c2014-05-04 17:05:02 -07002757 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002758
2759 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2760 return -ENOSYS;
2761 ret = check_for_audio_disc(cdi, cdi->ops);
2762 if (ret)
2763 return ret;
2764 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2765}
2766
2767/*
Joe Perches2e9aa082014-05-04 17:05:08 -07002768 * Required when we need to use READ_10 to issue other than 2048 block
2769 * reads
2770 */
2771static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2772{
Kees Cook853fe1b2017-02-13 16:25:26 -08002773 const struct cdrom_device_ops *cdo = cdi->ops;
Joe Perches2e9aa082014-05-04 17:05:08 -07002774 struct packet_command cgc;
2775 struct modesel_head mh;
2776
2777 memset(&mh, 0, sizeof(mh));
2778 mh.block_desc_length = 0x08;
2779 mh.block_length_med = (size >> 8) & 0xff;
2780 mh.block_length_lo = size & 0xff;
2781
2782 memset(&cgc, 0, sizeof(cgc));
2783 cgc.cmd[0] = 0x15;
2784 cgc.cmd[1] = 1 << 4;
2785 cgc.cmd[4] = 12;
2786 cgc.buflen = sizeof(mh);
2787 cgc.buffer = (char *) &mh;
2788 cgc.data_direction = CGC_DATA_WRITE;
2789 mh.block_desc_length = 0x08;
2790 mh.block_length_med = (size >> 8) & 0xff;
2791 mh.block_length_lo = size & 0xff;
2792
2793 return cdo->generic_packet(cdi, &cgc);
2794}
2795
Joe Perchese1e60fd2014-05-04 17:05:09 -07002796static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2797 __u16 track, __u8 type, track_information *ti)
2798{
Kees Cook853fe1b2017-02-13 16:25:26 -08002799 const struct cdrom_device_ops *cdo = cdi->ops;
Joe Perchese1e60fd2014-05-04 17:05:09 -07002800 struct packet_command cgc;
2801 int ret, buflen;
2802
2803 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2804 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2805 cgc.cmd[1] = type & 3;
2806 cgc.cmd[4] = (track & 0xff00) >> 8;
2807 cgc.cmd[5] = track & 0xff;
2808 cgc.cmd[8] = 8;
2809 cgc.quiet = 1;
2810
2811 ret = cdo->generic_packet(cdi, &cgc);
2812 if (ret)
2813 return ret;
2814
2815 buflen = be16_to_cpu(ti->track_information_length) +
2816 sizeof(ti->track_information_length);
2817
2818 if (buflen > sizeof(track_information))
2819 buflen = sizeof(track_information);
2820
2821 cgc.cmd[8] = cgc.buflen = buflen;
2822 ret = cdo->generic_packet(cdi, &cgc);
2823 if (ret)
2824 return ret;
2825
2826 /* return actual fill size */
2827 return buflen;
2828}
2829
2830/* return the last written block on the CD-R media. this is for the udf
2831 file system. */
2832int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2833{
2834 struct cdrom_tocentry toc;
2835 disc_information di;
2836 track_information ti;
2837 __u32 last_track;
2838 int ret = -1, ti_size;
2839
2840 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2841 goto use_toc;
2842
2843 ret = cdrom_get_disc_info(cdi, &di);
2844 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2845 + sizeof(di.last_track_lsb)))
2846 goto use_toc;
2847
2848 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2849 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2850 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2851 if (ti_size < (int)offsetof(typeof(ti), track_start))
2852 goto use_toc;
2853
2854 /* if this track is blank, try the previous. */
2855 if (ti.blank) {
2856 if (last_track == 1)
2857 goto use_toc;
2858 last_track--;
2859 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2860 }
2861
2862 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2863 + sizeof(ti.track_size)))
2864 goto use_toc;
2865
2866 /* if last recorded field is valid, return it. */
2867 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2868 + sizeof(ti.last_rec_address))) {
2869 *last_written = be32_to_cpu(ti.last_rec_address);
2870 } else {
2871 /* make it up instead */
2872 *last_written = be32_to_cpu(ti.track_start) +
2873 be32_to_cpu(ti.track_size);
2874 if (ti.free_blocks)
2875 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2876 }
2877 return 0;
2878
2879 /* this is where we end up if the drive either can't do a
2880 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2881 it doesn't give enough information or fails. then we return
2882 the toc contents. */
2883use_toc:
2884 toc.cdte_format = CDROM_MSF;
2885 toc.cdte_track = CDROM_LEADOUT;
2886 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2887 return ret;
2888 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2889 *last_written = toc.cdte_addr.lba;
2890 return 0;
2891}
2892
Joe Perchesdac1c5c2014-05-04 17:05:10 -07002893/* return the next writable block. also for udf file system. */
2894static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2895 long *next_writable)
2896{
2897 disc_information di;
2898 track_information ti;
2899 __u16 last_track;
2900 int ret, ti_size;
2901
2902 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2903 goto use_last_written;
2904
2905 ret = cdrom_get_disc_info(cdi, &di);
2906 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2907 + sizeof(di.last_track_lsb))
2908 goto use_last_written;
2909
2910 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2911 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2912 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2913 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2914 goto use_last_written;
2915
2916 /* if this track is blank, try the previous. */
2917 if (ti.blank) {
2918 if (last_track == 1)
2919 goto use_last_written;
2920 last_track--;
2921 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2922 if (ti_size < 0)
2923 goto use_last_written;
2924 }
2925
2926 /* if next recordable address field is valid, use it. */
2927 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2928 + sizeof(ti.next_writable)) {
2929 *next_writable = be32_to_cpu(ti.next_writable);
2930 return 0;
2931 }
2932
2933use_last_written:
2934 ret = cdrom_get_last_written(cdi, next_writable);
2935 if (ret) {
2936 *next_writable = 0;
2937 return ret;
2938 } else {
2939 *next_writable += 7;
2940 return 0;
2941 }
2942}
2943
Joe Perches2e9aa082014-05-04 17:05:08 -07002944static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2945 void __user *arg,
2946 struct packet_command *cgc,
2947 int cmd)
2948{
2949 struct request_sense sense;
2950 struct cdrom_msf msf;
2951 int blocksize = 0, format = 0, lba;
2952 int ret;
2953
2954 switch (cmd) {
2955 case CDROMREADRAW:
2956 blocksize = CD_FRAMESIZE_RAW;
2957 break;
2958 case CDROMREADMODE1:
2959 blocksize = CD_FRAMESIZE;
2960 format = 2;
2961 break;
2962 case CDROMREADMODE2:
2963 blocksize = CD_FRAMESIZE_RAW0;
2964 break;
2965 }
2966 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2967 return -EFAULT;
2968 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2969 /* FIXME: we need upper bound checking, too!! */
2970 if (lba < 0)
2971 return -EINVAL;
2972
2973 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2974 if (cgc->buffer == NULL)
2975 return -ENOMEM;
2976
2977 memset(&sense, 0, sizeof(sense));
2978 cgc->sense = &sense;
2979 cgc->data_direction = CGC_DATA_READ;
2980 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2981 if (ret && sense.sense_key == 0x05 &&
2982 sense.asc == 0x20 &&
2983 sense.ascq == 0x00) {
2984 /*
2985 * SCSI-II devices are not required to support
2986 * READ_CD, so let's try switching block size
2987 */
2988 /* FIXME: switch back again... */
2989 ret = cdrom_switch_blocksize(cdi, blocksize);
2990 if (ret)
2991 goto out;
2992 cgc->sense = NULL;
2993 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2994 ret |= cdrom_switch_blocksize(cdi, blocksize);
2995 }
2996 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2997 ret = -EFAULT;
2998out:
2999 kfree(cgc->buffer);
3000 return ret;
3001}
3002
3003static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3004 void __user *arg)
3005{
3006 struct cdrom_read_audio ra;
3007 int lba;
3008
3009 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3010 sizeof(ra)))
3011 return -EFAULT;
3012
3013 if (ra.addr_format == CDROM_MSF)
3014 lba = msf_to_lba(ra.addr.msf.minute,
3015 ra.addr.msf.second,
3016 ra.addr.msf.frame);
3017 else if (ra.addr_format == CDROM_LBA)
3018 lba = ra.addr.lba;
3019 else
3020 return -EINVAL;
3021
3022 /* FIXME: we need upper bound checking, too!! */
3023 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3024 return -EINVAL;
3025
3026 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3027}
3028
3029static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3030 void __user *arg)
3031{
3032 int ret;
3033 struct cdrom_subchnl q;
3034 u_char requested, back;
3035 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3036 return -EFAULT;
3037 requested = q.cdsc_format;
3038 if (!((requested == CDROM_MSF) ||
3039 (requested == CDROM_LBA)))
3040 return -EINVAL;
vchannaiahbf294e82016-06-29 08:18:25 -04003041
Joe Perches2e9aa082014-05-04 17:05:08 -07003042 ret = cdrom_read_subchannel(cdi, &q, 0);
3043 if (ret)
3044 return ret;
3045 back = q.cdsc_format; /* local copy */
3046 sanitize_format(&q.cdsc_absaddr, &back, requested);
3047 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3048 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3049 return -EFAULT;
3050 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3051 return 0;
3052}
3053
3054static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3055 void __user *arg,
3056 struct packet_command *cgc)
3057{
Kees Cook853fe1b2017-02-13 16:25:26 -08003058 const struct cdrom_device_ops *cdo = cdi->ops;
Joe Perches2e9aa082014-05-04 17:05:08 -07003059 struct cdrom_msf msf;
3060 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3061 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3062 return -EFAULT;
3063 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3064 cgc->cmd[3] = msf.cdmsf_min0;
3065 cgc->cmd[4] = msf.cdmsf_sec0;
3066 cgc->cmd[5] = msf.cdmsf_frame0;
3067 cgc->cmd[6] = msf.cdmsf_min1;
3068 cgc->cmd[7] = msf.cdmsf_sec1;
3069 cgc->cmd[8] = msf.cdmsf_frame1;
3070 cgc->data_direction = CGC_DATA_NONE;
3071 return cdo->generic_packet(cdi, cgc);
3072}
3073
3074static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3075 void __user *arg,
3076 struct packet_command *cgc)
3077{
Kees Cook853fe1b2017-02-13 16:25:26 -08003078 const struct cdrom_device_ops *cdo = cdi->ops;
Joe Perches2e9aa082014-05-04 17:05:08 -07003079 struct cdrom_blk blk;
3080 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3081 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3082 return -EFAULT;
3083 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3084 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3085 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3086 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3087 cgc->cmd[5] = blk.from & 0xff;
3088 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3089 cgc->cmd[8] = blk.len & 0xff;
3090 cgc->data_direction = CGC_DATA_NONE;
3091 return cdo->generic_packet(cdi, cgc);
3092}
3093
3094static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3095 void __user *arg,
3096 struct packet_command *cgc,
3097 unsigned int cmd)
3098{
3099 struct cdrom_volctrl volctrl;
3100 unsigned char buffer[32];
3101 char mask[sizeof(buffer)];
3102 unsigned short offset;
3103 int ret;
3104
3105 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3106
3107 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3108 sizeof(volctrl)))
3109 return -EFAULT;
3110
3111 cgc->buffer = buffer;
3112 cgc->buflen = 24;
3113 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3114 if (ret)
3115 return ret;
3116
3117 /* originally the code depended on buffer[1] to determine
3118 how much data is available for transfer. buffer[1] is
3119 unfortunately ambigious and the only reliable way seem
3120 to be to simply skip over the block descriptor... */
3121 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3122
3123 if (offset + 16 > sizeof(buffer))
3124 return -E2BIG;
3125
3126 if (offset + 16 > cgc->buflen) {
3127 cgc->buflen = offset + 16;
3128 ret = cdrom_mode_sense(cdi, cgc,
3129 GPMODE_AUDIO_CTL_PAGE, 0);
3130 if (ret)
3131 return ret;
3132 }
3133
3134 /* sanity check */
3135 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3136 buffer[offset + 1] < 14)
3137 return -EINVAL;
3138
3139 /* now we have the current volume settings. if it was only
3140 a CDROMVOLREAD, return these values */
3141 if (cmd == CDROMVOLREAD) {
3142 volctrl.channel0 = buffer[offset+9];
3143 volctrl.channel1 = buffer[offset+11];
3144 volctrl.channel2 = buffer[offset+13];
3145 volctrl.channel3 = buffer[offset+15];
3146 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3147 sizeof(volctrl)))
3148 return -EFAULT;
3149 return 0;
3150 }
3151
3152 /* get the volume mask */
3153 cgc->buffer = mask;
3154 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3155 if (ret)
3156 return ret;
3157
3158 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3159 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3160 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3161 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3162
3163 /* set volume */
3164 cgc->buffer = buffer + offset - 8;
3165 memset(cgc->buffer, 0, 8);
3166 return cdrom_mode_select(cdi, cgc);
3167}
3168
3169static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3170 struct packet_command *cgc,
3171 int cmd)
3172{
Kees Cook853fe1b2017-02-13 16:25:26 -08003173 const struct cdrom_device_ops *cdo = cdi->ops;
Joe Perches2e9aa082014-05-04 17:05:08 -07003174 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3175 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3176 cgc->cmd[1] = 1;
3177 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3178 cgc->data_direction = CGC_DATA_NONE;
3179 return cdo->generic_packet(cdi, cgc);
3180}
3181
3182static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3183 struct packet_command *cgc,
3184 int cmd)
3185{
Kees Cook853fe1b2017-02-13 16:25:26 -08003186 const struct cdrom_device_ops *cdo = cdi->ops;
Joe Perches2e9aa082014-05-04 17:05:08 -07003187 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3188 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3189 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3190 cgc->data_direction = CGC_DATA_NONE;
3191 return cdo->generic_packet(cdi, cgc);
3192}
3193
3194static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3195 void __user *arg,
3196 struct packet_command *cgc)
3197{
3198 int ret;
3199 dvd_struct *s;
3200 int size = sizeof(dvd_struct);
3201
3202 if (!CDROM_CAN(CDC_DVD))
3203 return -ENOSYS;
3204
Al Viroabb0f6a2016-01-02 14:59:38 -05003205 s = memdup_user(arg, size);
3206 if (IS_ERR(s))
3207 return PTR_ERR(s);
Joe Perches2e9aa082014-05-04 17:05:08 -07003208
3209 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
Joe Perches2e9aa082014-05-04 17:05:08 -07003210
3211 ret = dvd_read_struct(cdi, s, cgc);
3212 if (ret)
3213 goto out;
3214
3215 if (copy_to_user(arg, s, size))
3216 ret = -EFAULT;
3217out:
3218 kfree(s);
3219 return ret;
3220}
3221
3222static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3223 void __user *arg)
3224{
3225 int ret;
3226 dvd_authinfo ai;
3227 if (!CDROM_CAN(CDC_DVD))
3228 return -ENOSYS;
3229 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3230 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3231 return -EFAULT;
3232 ret = dvd_do_auth(cdi, &ai);
3233 if (ret)
3234 return ret;
3235 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3236 return -EFAULT;
3237 return 0;
3238}
3239
3240static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3241 void __user *arg)
3242{
3243 int ret;
3244 long next = 0;
3245 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3246 ret = cdrom_get_next_writable(cdi, &next);
3247 if (ret)
3248 return ret;
3249 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3250 return -EFAULT;
3251 return 0;
3252}
3253
3254static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3255 void __user *arg)
3256{
3257 int ret;
3258 long last = 0;
3259 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3260 ret = cdrom_get_last_written(cdi, &last);
3261 if (ret)
3262 return ret;
3263 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3264 return -EFAULT;
3265 return 0;
3266}
3267
3268static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3269 unsigned long arg)
3270{
3271 struct packet_command cgc;
3272 void __user *userptr = (void __user *)arg;
3273
3274 memset(&cgc, 0, sizeof(cgc));
3275
3276 /* build a unified command and queue it through
3277 cdo->generic_packet() */
3278 switch (cmd) {
3279 case CDROMREADRAW:
3280 case CDROMREADMODE1:
3281 case CDROMREADMODE2:
3282 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3283 case CDROMREADAUDIO:
3284 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3285 case CDROMSUBCHNL:
3286 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3287 case CDROMPLAYMSF:
3288 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3289 case CDROMPLAYBLK:
3290 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3291 case CDROMVOLCTRL:
3292 case CDROMVOLREAD:
3293 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3294 case CDROMSTART:
3295 case CDROMSTOP:
3296 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3297 case CDROMPAUSE:
3298 case CDROMRESUME:
3299 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3300 case DVD_READ_STRUCT:
3301 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3302 case DVD_AUTH:
3303 return mmc_ioctl_dvd_auth(cdi, userptr);
3304 case CDROM_NEXT_WRITABLE:
3305 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3306 case CDROM_LAST_WRITTEN:
3307 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3308 }
3309
3310 return -ENOTTY;
3311}
3312
3313/*
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003314 * Just about every imaginable ioctl is supported in the Uniform layer
3315 * these days.
3316 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3317 */
Al Virobbc1cc92007-10-07 17:54:28 -04003318int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3319 fmode_t mode, unsigned int cmd, unsigned long arg)
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003320{
3321 void __user *argp = (void __user *)arg;
3322 int ret;
3323
3324 /*
3325 * Try the generic SCSI command ioctl's first.
3326 */
Paolo Bonzini577ebb32012-01-12 16:01:27 +01003327 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003328 if (ret != -ENOTTY)
3329 return ret;
3330
3331 switch (cmd) {
3332 case CDROMMULTISESSION:
3333 return cdrom_ioctl_multisession(cdi, argp);
3334 case CDROMEJECT:
3335 return cdrom_ioctl_eject(cdi);
3336 case CDROMCLOSETRAY:
3337 return cdrom_ioctl_closetray(cdi);
3338 case CDROMEJECT_SW:
3339 return cdrom_ioctl_eject_sw(cdi, arg);
3340 case CDROM_MEDIA_CHANGED:
3341 return cdrom_ioctl_media_changed(cdi, arg);
3342 case CDROM_SET_OPTIONS:
3343 return cdrom_ioctl_set_options(cdi, arg);
3344 case CDROM_CLEAR_OPTIONS:
3345 return cdrom_ioctl_clear_options(cdi, arg);
3346 case CDROM_SELECT_SPEED:
3347 return cdrom_ioctl_select_speed(cdi, arg);
3348 case CDROM_SELECT_DISC:
3349 return cdrom_ioctl_select_disc(cdi, arg);
3350 case CDROMRESET:
Al Virobbc1cc92007-10-07 17:54:28 -04003351 return cdrom_ioctl_reset(cdi, bdev);
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003352 case CDROM_LOCKDOOR:
3353 return cdrom_ioctl_lock_door(cdi, arg);
3354 case CDROM_DEBUG:
3355 return cdrom_ioctl_debug(cdi, arg);
3356 case CDROM_GET_CAPABILITY:
3357 return cdrom_ioctl_get_capability(cdi);
3358 case CDROM_GET_MCN:
3359 return cdrom_ioctl_get_mcn(cdi, argp);
3360 case CDROM_DRIVE_STATUS:
3361 return cdrom_ioctl_drive_status(cdi, arg);
3362 case CDROM_DISC_STATUS:
3363 return cdrom_ioctl_disc_status(cdi);
3364 case CDROM_CHANGER_NSLOTS:
3365 return cdrom_ioctl_changer_nslots(cdi);
3366 }
3367
3368 /*
3369 * Use the ioctls that are implemented through the generic_packet()
3370 * interface. this may look at bit funny, but if -ENOTTY is
3371 * returned that particular ioctl is not implemented and we
3372 * let it go through the device specific ones.
3373 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003374 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3375 ret = mmc_ioctl(cdi, cmd, arg);
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003376 if (ret != -ENOTTY)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003377 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378 }
3379
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003380 /*
Joe Perches5944b2c2014-05-04 17:05:02 -07003381 * Note: most of the cd_dbg() calls are commented out here,
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003382 * because they fill up the sys log when CD players poll
3383 * the drive.
3384 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003385 switch (cmd) {
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003386 case CDROMSUBCHNL:
3387 return cdrom_ioctl_get_subchnl(cdi, argp);
3388 case CDROMREADTOCHDR:
3389 return cdrom_ioctl_read_tochdr(cdi, argp);
3390 case CDROMREADTOCENTRY:
3391 return cdrom_ioctl_read_tocentry(cdi, argp);
3392 case CDROMPLAYMSF:
3393 return cdrom_ioctl_play_msf(cdi, argp);
3394 case CDROMPLAYTRKIND:
3395 return cdrom_ioctl_play_trkind(cdi, argp);
3396 case CDROMVOLCTRL:
3397 return cdrom_ioctl_volctrl(cdi, argp);
3398 case CDROMVOLREAD:
3399 return cdrom_ioctl_volread(cdi, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003400 case CDROMSTART:
3401 case CDROMSTOP:
3402 case CDROMPAUSE:
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003403 case CDROMRESUME:
3404 return cdrom_ioctl_audioctl(cdi, cmd);
3405 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003406
Linus Torvalds1da177e2005-04-16 15:20:36 -07003407 return -ENOSYS;
3408}
3409
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410EXPORT_SYMBOL(cdrom_get_last_written);
3411EXPORT_SYMBOL(register_cdrom);
3412EXPORT_SYMBOL(unregister_cdrom);
3413EXPORT_SYMBOL(cdrom_open);
3414EXPORT_SYMBOL(cdrom_release);
3415EXPORT_SYMBOL(cdrom_ioctl);
3416EXPORT_SYMBOL(cdrom_media_changed);
3417EXPORT_SYMBOL(cdrom_number_of_slots);
3418EXPORT_SYMBOL(cdrom_mode_select);
3419EXPORT_SYMBOL(cdrom_mode_sense);
3420EXPORT_SYMBOL(init_cdrom_command);
3421EXPORT_SYMBOL(cdrom_get_media_event);
3422
3423#ifdef CONFIG_SYSCTL
3424
3425#define CDROM_STR_SIZE 1000
3426
3427static struct cdrom_sysctl_settings {
3428 char info[CDROM_STR_SIZE]; /* general info */
3429 int autoclose; /* close tray upon mount, etc */
3430 int autoeject; /* eject on umount */
3431 int debug; /* turn on debugging messages */
3432 int lock; /* lock the door on device open */
3433 int check; /* check media type */
3434} cdrom_sysctl_settings;
3435
Dave Young554988d2007-06-19 09:14:26 +02003436enum cdrom_print_option {
3437 CTL_NAME,
3438 CTL_SPEED,
3439 CTL_SLOTS,
3440 CTL_CAPABILITY
3441};
3442
3443static int cdrom_print_info(const char *header, int val, char *info,
3444 int *pos, enum cdrom_print_option option)
3445{
3446 const int max_size = sizeof(cdrom_sysctl_settings.info);
3447 struct cdrom_device_info *cdi;
3448 int ret;
3449
3450 ret = scnprintf(info + *pos, max_size - *pos, header);
3451 if (!ret)
3452 return 1;
3453
3454 *pos += ret;
3455
Akinobu Mita7fd097d2008-03-26 12:09:02 +01003456 list_for_each_entry(cdi, &cdrom_list, list) {
Dave Young554988d2007-06-19 09:14:26 +02003457 switch (option) {
3458 case CTL_NAME:
3459 ret = scnprintf(info + *pos, max_size - *pos,
3460 "\t%s", cdi->name);
3461 break;
3462 case CTL_SPEED:
3463 ret = scnprintf(info + *pos, max_size - *pos,
3464 "\t%d", cdi->speed);
3465 break;
3466 case CTL_SLOTS:
3467 ret = scnprintf(info + *pos, max_size - *pos,
3468 "\t%d", cdi->capacity);
3469 break;
3470 case CTL_CAPABILITY:
3471 ret = scnprintf(info + *pos, max_size - *pos,
3472 "\t%d", CDROM_CAN(val) != 0);
3473 break;
3474 default:
Joe Perchese597cd02010-07-01 08:24:32 +02003475 pr_info("invalid option%d\n", option);
Dave Young554988d2007-06-19 09:14:26 +02003476 return 1;
3477 }
3478 if (!ret)
3479 return 1;
3480 *pos += ret;
3481 }
3482
3483 return 0;
3484}
3485
Joe Perches90a3b892014-06-06 14:37:57 -07003486static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003487 void __user *buffer, size_t *lenp, loff_t *ppos)
3488{
Dave Young554988d2007-06-19 09:14:26 +02003489 int pos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003490 char *info = cdrom_sysctl_settings.info;
Dave Young554988d2007-06-19 09:14:26 +02003491 const int max_size = sizeof(cdrom_sysctl_settings.info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003492
3493 if (!*lenp || (*ppos && !write)) {
3494 *lenp = 0;
3495 return 0;
3496 }
3497
Dave Young554988d2007-06-19 09:14:26 +02003498 mutex_lock(&cdrom_mutex);
3499
Linus Torvalds1da177e2005-04-16 15:20:36 -07003500 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3501
Dave Young554988d2007-06-19 09:14:26 +02003502 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3503 goto done;
3504 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3505 goto done;
3506 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3507 goto done;
3508 if (cdrom_print_info("\nCan close tray:\t",
3509 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3510 goto done;
3511 if (cdrom_print_info("\nCan open tray:\t",
3512 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3513 goto done;
3514 if (cdrom_print_info("\nCan lock tray:\t",
3515 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3516 goto done;
3517 if (cdrom_print_info("\nCan change speed:",
3518 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3519 goto done;
3520 if (cdrom_print_info("\nCan select disk:",
3521 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3522 goto done;
3523 if (cdrom_print_info("\nCan read multisession:",
3524 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3525 goto done;
3526 if (cdrom_print_info("\nCan read MCN:\t",
3527 CDC_MCN, info, &pos, CTL_CAPABILITY))
3528 goto done;
3529 if (cdrom_print_info("\nReports media changed:",
3530 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3531 goto done;
3532 if (cdrom_print_info("\nCan play audio:\t",
3533 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3534 goto done;
3535 if (cdrom_print_info("\nCan write CD-R:\t",
3536 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3537 goto done;
3538 if (cdrom_print_info("\nCan write CD-RW:",
3539 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3540 goto done;
3541 if (cdrom_print_info("\nCan read DVD:\t",
3542 CDC_DVD, info, &pos, CTL_CAPABILITY))
3543 goto done;
3544 if (cdrom_print_info("\nCan write DVD-R:",
3545 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3546 goto done;
3547 if (cdrom_print_info("\nCan write DVD-RAM:",
3548 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3549 goto done;
3550 if (cdrom_print_info("\nCan read MRW:\t",
3551 CDC_MRW, info, &pos, CTL_CAPABILITY))
3552 goto done;
3553 if (cdrom_print_info("\nCan write MRW:\t",
3554 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3555 goto done;
3556 if (cdrom_print_info("\nCan write RAM:\t",
3557 CDC_RAM, info, &pos, CTL_CAPABILITY))
3558 goto done;
3559 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3560 goto done;
3561doit:
3562 mutex_unlock(&cdrom_mutex);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -07003563 return proc_dostring(ctl, write, buffer, lenp, ppos);
Dave Young554988d2007-06-19 09:14:26 +02003564done:
Joe Perchese597cd02010-07-01 08:24:32 +02003565 pr_info("info buffer too small\n");
Dave Young554988d2007-06-19 09:14:26 +02003566 goto doit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003567}
3568
3569/* Unfortunately, per device settings are not implemented through
3570 procfs/sysctl yet. When they are, this will naturally disappear. For now
3571 just update all drives. Later this will become the template on which
3572 new registered drives will be based. */
3573static void cdrom_update_settings(void)
3574{
3575 struct cdrom_device_info *cdi;
3576
Akinobu Mita032d8d92008-03-26 12:09:01 +01003577 mutex_lock(&cdrom_mutex);
Akinobu Mita7fd097d2008-03-26 12:09:02 +01003578 list_for_each_entry(cdi, &cdrom_list, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003579 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3580 cdi->options |= CDO_AUTO_CLOSE;
3581 else if (!autoclose)
3582 cdi->options &= ~CDO_AUTO_CLOSE;
3583 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3584 cdi->options |= CDO_AUTO_EJECT;
3585 else if (!autoeject)
3586 cdi->options &= ~CDO_AUTO_EJECT;
3587 if (lockdoor && CDROM_CAN(CDC_LOCK))
3588 cdi->options |= CDO_LOCK;
3589 else if (!lockdoor)
3590 cdi->options &= ~CDO_LOCK;
3591 if (check_media_type)
3592 cdi->options |= CDO_CHECK_TYPE;
3593 else
3594 cdi->options &= ~CDO_CHECK_TYPE;
3595 }
Akinobu Mita032d8d92008-03-26 12:09:01 +01003596 mutex_unlock(&cdrom_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003597}
3598
Joe Perches90a3b892014-06-06 14:37:57 -07003599static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003600 void __user *buffer, size_t *lenp, loff_t *ppos)
3601{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003602 int ret;
3603
Alexey Dobriyan8d65af72009-09-23 15:57:19 -07003604 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003605
Eric W. Biederman06489b42007-10-18 03:05:28 -07003606 if (write) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003607
3608 /* we only care for 1 or 0. */
Eric W. Biederman06489b42007-10-18 03:05:28 -07003609 autoclose = !!cdrom_sysctl_settings.autoclose;
3610 autoeject = !!cdrom_sysctl_settings.autoeject;
3611 debug = !!cdrom_sysctl_settings.debug;
3612 lockdoor = !!cdrom_sysctl_settings.lock;
3613 check_media_type = !!cdrom_sysctl_settings.check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003614
Linus Torvalds1da177e2005-04-16 15:20:36 -07003615 /* update the option flags according to the changes. we
3616 don't have per device options through sysctl yet,
3617 but we will have and then this will disappear. */
3618 cdrom_update_settings();
3619 }
3620
3621 return ret;
3622}
3623
3624/* Place files in /proc/sys/dev/cdrom */
Joe Perches90a3b892014-06-06 14:37:57 -07003625static struct ctl_table cdrom_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003627 .procname = "info",
3628 .data = &cdrom_sysctl_settings.info,
3629 .maxlen = CDROM_STR_SIZE,
3630 .mode = 0444,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003631 .proc_handler = cdrom_sysctl_info,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003632 },
3633 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003634 .procname = "autoclose",
3635 .data = &cdrom_sysctl_settings.autoclose,
3636 .maxlen = sizeof(int),
3637 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003638 .proc_handler = cdrom_sysctl_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639 },
3640 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003641 .procname = "autoeject",
3642 .data = &cdrom_sysctl_settings.autoeject,
3643 .maxlen = sizeof(int),
3644 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003645 .proc_handler = cdrom_sysctl_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003646 },
3647 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003648 .procname = "debug",
3649 .data = &cdrom_sysctl_settings.debug,
3650 .maxlen = sizeof(int),
3651 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003652 .proc_handler = cdrom_sysctl_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003653 },
3654 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003655 .procname = "lock",
3656 .data = &cdrom_sysctl_settings.lock,
3657 .maxlen = sizeof(int),
3658 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003659 .proc_handler = cdrom_sysctl_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003660 },
3661 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003662 .procname = "check_media",
3663 .data = &cdrom_sysctl_settings.check,
3664 .maxlen = sizeof(int),
3665 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003666 .proc_handler = cdrom_sysctl_handler
Linus Torvalds1da177e2005-04-16 15:20:36 -07003667 },
Eric W. Biederman894d2492009-11-05 14:34:02 -08003668 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003669};
3670
Joe Perches90a3b892014-06-06 14:37:57 -07003671static struct ctl_table cdrom_cdrom_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003672 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003673 .procname = "cdrom",
3674 .maxlen = 0,
3675 .mode = 0555,
3676 .child = cdrom_table,
3677 },
Eric W. Biederman894d2492009-11-05 14:34:02 -08003678 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003679};
3680
3681/* Make sure that /proc/sys/dev is there */
Joe Perches90a3b892014-06-06 14:37:57 -07003682static struct ctl_table cdrom_root_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003684 .procname = "dev",
3685 .maxlen = 0,
3686 .mode = 0555,
3687 .child = cdrom_cdrom_table,
3688 },
Eric W. Biederman894d2492009-11-05 14:34:02 -08003689 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003690};
3691static struct ctl_table_header *cdrom_sysctl_header;
3692
3693static void cdrom_sysctl_register(void)
3694{
3695 static int initialized;
3696
3697 if (initialized == 1)
3698 return;
3699
Eric W. Biederman0b4d4142007-02-14 00:34:09 -08003700 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003701
3702 /* set the defaults */
3703 cdrom_sysctl_settings.autoclose = autoclose;
3704 cdrom_sysctl_settings.autoeject = autoeject;
3705 cdrom_sysctl_settings.debug = debug;
3706 cdrom_sysctl_settings.lock = lockdoor;
3707 cdrom_sysctl_settings.check = check_media_type;
3708
3709 initialized = 1;
3710}
3711
3712static void cdrom_sysctl_unregister(void)
3713{
3714 if (cdrom_sysctl_header)
3715 unregister_sysctl_table(cdrom_sysctl_header);
3716}
3717
Akinobu Mita17672cf2008-03-26 12:08:59 +01003718#else /* CONFIG_SYSCTL */
3719
3720static void cdrom_sysctl_register(void)
3721{
3722}
3723
3724static void cdrom_sysctl_unregister(void)
3725{
3726}
3727
Linus Torvalds1da177e2005-04-16 15:20:36 -07003728#endif /* CONFIG_SYSCTL */
3729
3730static int __init cdrom_init(void)
3731{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003732 cdrom_sysctl_register();
Akinobu Mita17672cf2008-03-26 12:08:59 +01003733
Linus Torvalds1da177e2005-04-16 15:20:36 -07003734 return 0;
3735}
3736
3737static void __exit cdrom_exit(void)
3738{
Joe Perchese597cd02010-07-01 08:24:32 +02003739 pr_info("Uniform CD-ROM driver unloaded\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003740 cdrom_sysctl_unregister();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003741}
3742
3743module_init(cdrom_init);
3744module_exit(cdrom_exit);
3745MODULE_LICENSE("GPL");