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