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