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 32 2.00 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 61 2.01 to 2.11 Dec 1997-Jan 1998 62 -- TO-DO! Write changelogs for 2.01 to 2.12. 63 64 2.12 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 70 2.13 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 85 2.50 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 #include <linux/uaccess.h> 285 #include <scsi/scsi_common.h> 286 #include <scsi/scsi_request.h> 287 288 /* used to tell the module to turn on full debugging messages */ 289 static bool debug; 290 /* default compatibility mode */ 291 static bool autoclose=1; 292 static bool autoeject; 293 static bool lockdoor = 1; 294 /* will we ever get to use this... sigh. */ 295 static bool check_media_type; 296 /* automatically restart mrw format */ 297 static bool mrw_format_restart = 1; 298 module_param(debug, bool, 0); 299 module_param(autoclose, bool, 0); 300 module_param(autoeject, bool, 0); 301 module_param(lockdoor, bool, 0); 302 module_param(check_media_type, bool, 0); 303 module_param(mrw_format_restart, bool, 0); 304 305 static DEFINE_MUTEX(cdrom_mutex); 306 307 static const char *mrw_format_status[] = { 308 "not mrw", 309 "bgformat inactive", 310 "bgformat active", 311 "mrw complete", 312 }; 313 314 static const char *mrw_address_space[] = { "DMA", "GAA" }; 315 316 #if (ERRLOGMASK != CD_NOTHING) 317 #define cd_dbg(type, fmt, ...) \ 318 do { \ 319 if ((ERRLOGMASK & type) || debug == 1) \ 320 pr_debug(fmt, ##__VA_ARGS__); \ 321 } while (0) 322 #else 323 #define cd_dbg(type, fmt, ...) \ 324 do { \ 325 if (0 && (ERRLOGMASK & type) || debug == 1) \ 326 pr_debug(fmt, ##__VA_ARGS__); \ 327 } while (0) 328 #endif 329 330 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in 331 a lot of places. This macro makes the code more clear. */ 332 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type)) 333 334 /* 335 * Another popular OS uses 7 seconds as the hard timeout for default 336 * commands, so it is a good choice for us as well. 337 */ 338 #define CDROM_DEF_TIMEOUT (7 * HZ) 339 340 /* Not-exported routines. */ 341 342 static void cdrom_sysctl_register(void); 343 344 static LIST_HEAD(cdrom_list); 345 346 int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 347 struct packet_command *cgc) 348 { 349 if (cgc->sshdr) { 350 cgc->sshdr->sense_key = 0x05; 351 cgc->sshdr->asc = 0x20; 352 cgc->sshdr->ascq = 0x00; 353 } 354 355 cgc->stat = -EIO; 356 return -EIO; 357 } 358 EXPORT_SYMBOL(cdrom_dummy_generic_packet); 359 360 static int cdrom_flush_cache(struct cdrom_device_info *cdi) 361 { 362 struct packet_command cgc; 363 364 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 365 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 366 367 cgc.timeout = 5 * 60 * HZ; 368 369 return cdi->ops->generic_packet(cdi, &cgc); 370 } 371 372 /* requires CD R/RW */ 373 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, 374 disc_information *di) 375 { 376 const struct cdrom_device_ops *cdo = cdi->ops; 377 struct packet_command cgc; 378 int ret, buflen; 379 380 /* set up command and get the disc info */ 381 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); 382 cgc.cmd[0] = GPCMD_READ_DISC_INFO; 383 cgc.cmd[8] = cgc.buflen = 2; 384 cgc.quiet = 1; 385 386 ret = cdo->generic_packet(cdi, &cgc); 387 if (ret) 388 return ret; 389 390 /* not all drives have the same disc_info length, so requeue 391 * packet with the length the drive tells us it can supply 392 */ 393 buflen = be16_to_cpu(di->disc_information_length) + 394 sizeof(di->disc_information_length); 395 396 if (buflen > sizeof(disc_information)) 397 buflen = sizeof(disc_information); 398 399 cgc.cmd[8] = cgc.buflen = buflen; 400 ret = cdo->generic_packet(cdi, &cgc); 401 if (ret) 402 return ret; 403 404 /* return actual fill size */ 405 return buflen; 406 } 407 408 /* This macro makes sure we don't have to check on cdrom_device_ops 409 * existence in the run-time routines below. Change_capability is a 410 * hack to have the capability flags defined const, while we can still 411 * change it here without gcc complaining at every line. 412 */ 413 #define ENSURE(cdo, call, bits) \ 414 do { \ 415 if (cdo->call == NULL) \ 416 WARN_ON_ONCE((cdo)->capability & (bits)); \ 417 } while (0) 418 419 /* 420 * the first prototypes used 0x2c as the page code for the mrw mode page, 421 * subsequently this was changed to 0x03. probe the one used by this drive 422 */ 423 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi) 424 { 425 struct packet_command cgc; 426 char buffer[16]; 427 428 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 429 430 cgc.timeout = HZ; 431 cgc.quiet = 1; 432 433 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) { 434 cdi->mrw_mode_page = MRW_MODE_PC; 435 return 0; 436 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) { 437 cdi->mrw_mode_page = MRW_MODE_PC_PRE1; 438 return 0; 439 } 440 441 return 1; 442 } 443 444 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write) 445 { 446 struct packet_command cgc; 447 struct mrw_feature_desc *mfd; 448 unsigned char buffer[16]; 449 int ret; 450 451 *write = 0; 452 453 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 454 455 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 456 cgc.cmd[3] = CDF_MRW; 457 cgc.cmd[8] = sizeof(buffer); 458 cgc.quiet = 1; 459 460 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 461 return ret; 462 463 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)]; 464 if (be16_to_cpu(mfd->feature_code) != CDF_MRW) 465 return 1; 466 *write = mfd->write; 467 468 if ((ret = cdrom_mrw_probe_pc(cdi))) { 469 *write = 0; 470 return ret; 471 } 472 473 return 0; 474 } 475 476 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont) 477 { 478 struct packet_command cgc; 479 unsigned char buffer[12]; 480 int ret; 481 482 pr_info("%sstarting format\n", cont ? "Re" : ""); 483 484 /* 485 * FmtData bit set (bit 4), format type is 1 486 */ 487 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE); 488 cgc.cmd[0] = GPCMD_FORMAT_UNIT; 489 cgc.cmd[1] = (1 << 4) | 1; 490 491 cgc.timeout = 5 * 60 * HZ; 492 493 /* 494 * 4 byte format list header, 8 byte format list descriptor 495 */ 496 buffer[1] = 1 << 1; 497 buffer[3] = 8; 498 499 /* 500 * nr_blocks field 501 */ 502 buffer[4] = 0xff; 503 buffer[5] = 0xff; 504 buffer[6] = 0xff; 505 buffer[7] = 0xff; 506 507 buffer[8] = 0x24 << 2; 508 buffer[11] = cont; 509 510 ret = cdi->ops->generic_packet(cdi, &cgc); 511 if (ret) 512 pr_info("bgformat failed\n"); 513 514 return ret; 515 } 516 517 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed) 518 { 519 struct packet_command cgc; 520 521 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 522 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 523 524 /* 525 * Session = 1, Track = 0 526 */ 527 cgc.cmd[1] = !!immed; 528 cgc.cmd[2] = 1 << 1; 529 530 cgc.timeout = 5 * 60 * HZ; 531 532 return cdi->ops->generic_packet(cdi, &cgc); 533 } 534 535 static int cdrom_mrw_exit(struct cdrom_device_info *cdi) 536 { 537 disc_information di; 538 int ret; 539 540 ret = cdrom_get_disc_info(cdi, &di); 541 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type)) 542 return 1; 543 544 ret = 0; 545 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) { 546 pr_info("issuing MRW background format suspend\n"); 547 ret = cdrom_mrw_bgformat_susp(cdi, 0); 548 } 549 550 if (!ret && cdi->media_written) 551 ret = cdrom_flush_cache(cdi); 552 553 return ret; 554 } 555 556 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space) 557 { 558 struct packet_command cgc; 559 struct mode_page_header *mph; 560 char buffer[16]; 561 int ret, offset, size; 562 563 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 564 565 cgc.buffer = buffer; 566 cgc.buflen = sizeof(buffer); 567 568 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0); 569 if (ret) 570 return ret; 571 572 mph = (struct mode_page_header *)buffer; 573 offset = be16_to_cpu(mph->desc_length); 574 size = be16_to_cpu(mph->mode_data_length) + 2; 575 576 buffer[offset + 3] = space; 577 cgc.buflen = size; 578 579 ret = cdrom_mode_select(cdi, &cgc); 580 if (ret) 581 return ret; 582 583 pr_info("%s: mrw address space %s selected\n", 584 cdi->name, mrw_address_space[space]); 585 return 0; 586 } 587 588 int register_cdrom(struct cdrom_device_info *cdi) 589 { 590 static char banner_printed; 591 const struct cdrom_device_ops *cdo = cdi->ops; 592 593 cd_dbg(CD_OPEN, "entering register_cdrom\n"); 594 595 if (cdo->open == NULL || cdo->release == NULL) 596 return -EINVAL; 597 if (!banner_printed) { 598 pr_info("Uniform CD-ROM driver " REVISION "\n"); 599 banner_printed = 1; 600 cdrom_sysctl_register(); 601 } 602 603 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS); 604 if (cdo->check_events == NULL && cdo->media_changed == NULL) 605 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC)); 606 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY); 607 ENSURE(cdo, lock_door, CDC_LOCK); 608 ENSURE(cdo, select_speed, CDC_SELECT_SPEED); 609 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION); 610 ENSURE(cdo, get_mcn, CDC_MCN); 611 ENSURE(cdo, reset, CDC_RESET); 612 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET); 613 cdi->mc_flags = 0; 614 cdi->options = CDO_USE_FFLAGS; 615 616 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 WARN_ON(!cdo->generic_packet); 634 635 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name); 636 mutex_lock(&cdrom_mutex); 637 list_add(&cdi->list, &cdrom_list); 638 mutex_unlock(&cdrom_mutex); 639 return 0; 640 } 641 #undef ENSURE 642 643 void unregister_cdrom(struct cdrom_device_info *cdi) 644 { 645 cd_dbg(CD_OPEN, "entering unregister_cdrom\n"); 646 647 mutex_lock(&cdrom_mutex); 648 list_del(&cdi->list); 649 mutex_unlock(&cdrom_mutex); 650 651 if (cdi->exit) 652 cdi->exit(cdi); 653 654 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name); 655 } 656 657 int cdrom_get_media_event(struct cdrom_device_info *cdi, 658 struct media_event_desc *med) 659 { 660 struct packet_command cgc; 661 unsigned char buffer[8]; 662 struct event_header *eh = (struct event_header *)buffer; 663 664 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 665 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION; 666 cgc.cmd[1] = 1; /* IMMED */ 667 cgc.cmd[4] = 1 << 4; /* media event */ 668 cgc.cmd[8] = sizeof(buffer); 669 cgc.quiet = 1; 670 671 if (cdi->ops->generic_packet(cdi, &cgc)) 672 return 1; 673 674 if (be16_to_cpu(eh->data_len) < sizeof(*med)) 675 return 1; 676 677 if (eh->nea || eh->notification_class != 0x4) 678 return 1; 679 680 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med)); 681 return 0; 682 } 683 684 static int cdrom_get_random_writable(struct cdrom_device_info *cdi, 685 struct rwrt_feature_desc *rfd) 686 { 687 struct packet_command cgc; 688 char buffer[24]; 689 int ret; 690 691 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 692 693 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */ 694 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */ 695 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */ 696 cgc.quiet = 1; 697 698 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 699 return ret; 700 701 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd)); 702 return 0; 703 } 704 705 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi) 706 { 707 struct packet_command cgc; 708 char buffer[16]; 709 __be16 *feature_code; 710 int ret; 711 712 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 713 714 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 715 cgc.cmd[3] = CDF_HWDM; 716 cgc.cmd[8] = sizeof(buffer); 717 cgc.quiet = 1; 718 719 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 720 return ret; 721 722 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)]; 723 if (be16_to_cpu(*feature_code) == CDF_HWDM) 724 return 0; 725 726 return 1; 727 } 728 729 730 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write) 731 { 732 struct rwrt_feature_desc rfd; 733 int ret; 734 735 *write = 0; 736 737 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 738 return ret; 739 740 if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 741 *write = 1; 742 743 return 0; 744 } 745 746 static int cdrom_media_erasable(struct cdrom_device_info *cdi) 747 { 748 disc_information di; 749 int ret; 750 751 ret = cdrom_get_disc_info(cdi, &di); 752 if (ret < 0 || ret < offsetof(typeof(di), n_first_track)) 753 return -1; 754 755 return di.erasable; 756 } 757 758 /* 759 * FIXME: check RO bit 760 */ 761 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi) 762 { 763 int ret = cdrom_media_erasable(cdi); 764 765 /* 766 * allow writable open if media info read worked and media is 767 * erasable, _or_ if it fails since not all drives support it 768 */ 769 if (!ret) 770 return 1; 771 772 return 0; 773 } 774 775 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi) 776 { 777 disc_information di; 778 int ret; 779 780 /* 781 * always reset to DMA lba space on open 782 */ 783 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) { 784 pr_err("failed setting lba address space\n"); 785 return 1; 786 } 787 788 ret = cdrom_get_disc_info(cdi, &di); 789 if (ret < 0 || ret < offsetof(typeof(di),disc_type)) 790 return 1; 791 792 if (!di.erasable) 793 return 1; 794 795 /* 796 * mrw_status 797 * 0 - not MRW formatted 798 * 1 - MRW bgformat started, but not running or complete 799 * 2 - MRW bgformat in progress 800 * 3 - MRW formatting complete 801 */ 802 ret = 0; 803 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]); 804 if (!di.mrw_status) 805 ret = 1; 806 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE && 807 mrw_format_restart) 808 ret = cdrom_mrw_bgformat(cdi, 1); 809 810 return ret; 811 } 812 813 static int mo_open_write(struct cdrom_device_info *cdi) 814 { 815 struct packet_command cgc; 816 char buffer[255]; 817 int ret; 818 819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ); 820 cgc.quiet = 1; 821 822 /* 823 * obtain write protect information as per 824 * drivers/scsi/sd.c:sd_read_write_protect_flag 825 */ 826 827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 828 if (ret) 829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0); 830 if (ret) { 831 cgc.buflen = 255; 832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 833 } 834 835 /* drive gave us no info, let the user go ahead */ 836 if (ret) 837 return 0; 838 839 return buffer[3] & 0x80; 840 } 841 842 static int cdrom_ram_open_write(struct cdrom_device_info *cdi) 843 { 844 struct rwrt_feature_desc rfd; 845 int ret; 846 847 if ((ret = cdrom_has_defect_mgt(cdi))) 848 return ret; 849 850 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 851 return ret; 852 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 853 ret = !rfd.curr; 854 855 cd_dbg(CD_OPEN, "can open for random write\n"); 856 return ret; 857 } 858 859 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi) 860 { 861 struct packet_command cgc; 862 char buffer[32]; 863 int ret, mmc3_profile; 864 865 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 866 867 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 868 cgc.cmd[1] = 0; 869 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */ 870 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */ 871 cgc.quiet = 1; 872 873 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 874 mmc3_profile = 0xffff; 875 else 876 mmc3_profile = (buffer[6] << 8) | buffer[7]; 877 878 cdi->mmc3_profile = mmc3_profile; 879 } 880 881 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi) 882 { 883 switch (cdi->mmc3_profile) { 884 case 0x12: /* DVD-RAM */ 885 case 0x1A: /* DVD+RW */ 886 case 0x43: /* BD-RE */ 887 return 0; 888 default: 889 return 1; 890 } 891 } 892 893 /* 894 * returns 0 for ok to open write, non-0 to disallow 895 */ 896 static int cdrom_open_write(struct cdrom_device_info *cdi) 897 { 898 int mrw, mrw_write, ram_write; 899 int ret = 1; 900 901 mrw = 0; 902 if (!cdrom_is_mrw(cdi, &mrw_write)) 903 mrw = 1; 904 905 if (CDROM_CAN(CDC_MO_DRIVE)) 906 ram_write = 1; 907 else 908 (void) cdrom_is_random_writable(cdi, &ram_write); 909 910 if (mrw) 911 cdi->mask &= ~CDC_MRW; 912 else 913 cdi->mask |= CDC_MRW; 914 915 if (mrw_write) 916 cdi->mask &= ~CDC_MRW_W; 917 else 918 cdi->mask |= CDC_MRW_W; 919 920 if (ram_write) 921 cdi->mask &= ~CDC_RAM; 922 else 923 cdi->mask |= CDC_RAM; 924 925 if (CDROM_CAN(CDC_MRW_W)) 926 ret = cdrom_mrw_open_write(cdi); 927 else if (CDROM_CAN(CDC_DVD_RAM)) 928 ret = cdrom_dvdram_open_write(cdi); 929 else if (CDROM_CAN(CDC_RAM) && 930 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE)) 931 ret = cdrom_ram_open_write(cdi); 932 else if (CDROM_CAN(CDC_MO_DRIVE)) 933 ret = mo_open_write(cdi); 934 else if (!cdrom_is_dvd_rw(cdi)) 935 ret = 0; 936 937 return ret; 938 } 939 940 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi) 941 { 942 struct packet_command cgc; 943 944 if (cdi->mmc3_profile != 0x1a) { 945 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name); 946 return; 947 } 948 949 if (!cdi->media_written) { 950 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name); 951 return; 952 } 953 954 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name); 955 956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 957 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 958 cgc.timeout = 30*HZ; 959 cdi->ops->generic_packet(cdi, &cgc); 960 961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 962 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 963 cgc.timeout = 3000*HZ; 964 cgc.quiet = 1; 965 cdi->ops->generic_packet(cdi, &cgc); 966 967 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 968 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 969 cgc.cmd[2] = 2; /* Close session */ 970 cgc.quiet = 1; 971 cgc.timeout = 3000*HZ; 972 cdi->ops->generic_packet(cdi, &cgc); 973 974 cdi->media_written = 0; 975 } 976 977 static int cdrom_close_write(struct cdrom_device_info *cdi) 978 { 979 #if 0 980 return cdrom_flush_cache(cdi); 981 #else 982 return 0; 983 #endif 984 } 985 986 /* badly broken, I know. Is due for a fixup anytime. */ 987 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks) 988 { 989 struct cdrom_tochdr header; 990 struct cdrom_tocentry entry; 991 int ret, i; 992 tracks->data = 0; 993 tracks->audio = 0; 994 tracks->cdi = 0; 995 tracks->xa = 0; 996 tracks->error = 0; 997 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); 998 /* Grab the TOC header so we can see how many tracks there are */ 999 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 1000 if (ret) { 1001 if (ret == -ENOMEDIUM) 1002 tracks->error = CDS_NO_DISC; 1003 else 1004 tracks->error = CDS_NO_INFO; 1005 return; 1006 } 1007 /* check what type of tracks are on this disc */ 1008 entry.cdte_format = CDROM_MSF; 1009 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) { 1010 entry.cdte_track = i; 1011 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) { 1012 tracks->error = CDS_NO_INFO; 1013 return; 1014 } 1015 if (entry.cdte_ctrl & CDROM_DATA_TRACK) { 1016 if (entry.cdte_format == 0x10) 1017 tracks->cdi++; 1018 else if (entry.cdte_format == 0x20) 1019 tracks->xa++; 1020 else 1021 tracks->data++; 1022 } else { 1023 tracks->audio++; 1024 } 1025 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n", 1026 i, entry.cdte_format, entry.cdte_ctrl); 1027 } 1028 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n", 1029 header.cdth_trk1, tracks->audio, tracks->data, 1030 tracks->cdi, tracks->xa); 1031 } 1032 1033 static 1034 int open_for_data(struct cdrom_device_info *cdi) 1035 { 1036 int ret; 1037 const struct cdrom_device_ops *cdo = cdi->ops; 1038 tracktype tracks; 1039 cd_dbg(CD_OPEN, "entering open_for_data\n"); 1040 /* Check if the driver can report drive status. If it can, we 1041 can do clever things. If it can't, well, we at least tried! */ 1042 if (cdo->drive_status != NULL) { 1043 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1044 cd_dbg(CD_OPEN, "drive_status=%d\n", ret); 1045 if (ret == CDS_TRAY_OPEN) { 1046 cd_dbg(CD_OPEN, "the tray is open...\n"); 1047 /* can/may i close it? */ 1048 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1049 cdi->options & CDO_AUTO_CLOSE) { 1050 cd_dbg(CD_OPEN, "trying to close the tray\n"); 1051 ret=cdo->tray_move(cdi,0); 1052 if (ret) { 1053 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n"); 1054 /* Ignore the error from the low 1055 level driver. We don't care why it 1056 couldn't close the tray. We only care 1057 that there is no disc in the drive, 1058 since that is the _REAL_ problem here.*/ 1059 ret=-ENOMEDIUM; 1060 goto clean_up_and_return; 1061 } 1062 } else { 1063 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n"); 1064 ret=-ENOMEDIUM; 1065 goto clean_up_and_return; 1066 } 1067 /* Ok, the door should be closed now.. Check again */ 1068 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1069 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1070 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n"); 1071 cd_dbg(CD_OPEN, "tray might not contain a medium\n"); 1072 ret=-ENOMEDIUM; 1073 goto clean_up_and_return; 1074 } 1075 cd_dbg(CD_OPEN, "the tray is now closed\n"); 1076 } 1077 /* the door should be closed now, check for the disc */ 1078 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1079 if (ret!=CDS_DISC_OK) { 1080 ret = -ENOMEDIUM; 1081 goto clean_up_and_return; 1082 } 1083 } 1084 cdrom_count_tracks(cdi, &tracks); 1085 if (tracks.error == CDS_NO_DISC) { 1086 cd_dbg(CD_OPEN, "bummer. no disc.\n"); 1087 ret=-ENOMEDIUM; 1088 goto clean_up_and_return; 1089 } 1090 /* CD-Players which don't use O_NONBLOCK, workman 1091 * for example, need bit CDO_CHECK_TYPE cleared! */ 1092 if (tracks.data==0) { 1093 if (cdi->options & CDO_CHECK_TYPE) { 1094 /* give people a warning shot, now that CDO_CHECK_TYPE 1095 is the default case! */ 1096 cd_dbg(CD_OPEN, "bummer. wrong media type.\n"); 1097 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n", 1098 (unsigned int)task_pid_nr(current)); 1099 ret=-EMEDIUMTYPE; 1100 goto clean_up_and_return; 1101 } 1102 else { 1103 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n"); 1104 } 1105 } 1106 1107 cd_dbg(CD_OPEN, "all seems well, opening the devicen"); 1108 1109 /* all seems well, we can open the device */ 1110 ret = cdo->open(cdi, 0); /* open for data */ 1111 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret); 1112 /* After all this careful checking, we shouldn't have problems 1113 opening the device, but we don't want the device locked if 1114 this somehow fails... */ 1115 if (ret) { 1116 cd_dbg(CD_OPEN, "open device failed\n"); 1117 goto clean_up_and_return; 1118 } 1119 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) { 1120 cdo->lock_door(cdi, 1); 1121 cd_dbg(CD_OPEN, "door locked\n"); 1122 } 1123 cd_dbg(CD_OPEN, "device opened successfully\n"); 1124 return ret; 1125 1126 /* Something failed. Try to unlock the drive, because some drivers 1127 (notably ide-cd) lock the drive after every command. This produced 1128 a nasty bug where after mount failed, the drive would remain locked! 1129 This ensures that the drive gets unlocked after a mount fails. This 1130 is a goto to avoid bloating the driver with redundant code. */ 1131 clean_up_and_return: 1132 cd_dbg(CD_OPEN, "open failed\n"); 1133 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1134 cdo->lock_door(cdi, 0); 1135 cd_dbg(CD_OPEN, "door unlocked\n"); 1136 } 1137 return ret; 1138 } 1139 1140 /* We use the open-option O_NONBLOCK to indicate that the 1141 * purpose of opening is only for subsequent ioctl() calls; no device 1142 * integrity checks are performed. 1143 * 1144 * We hope that all cd-player programs will adopt this convention. It 1145 * is in their own interest: device control becomes a lot easier 1146 * this way. 1147 */ 1148 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, 1149 fmode_t mode) 1150 { 1151 int ret; 1152 1153 cd_dbg(CD_OPEN, "entering cdrom_open\n"); 1154 1155 /* if this was a O_NONBLOCK open and we should honor the flags, 1156 * do a quick open without drive/disc integrity checks. */ 1157 cdi->use_count++; 1158 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) { 1159 ret = cdi->ops->open(cdi, 1); 1160 } else { 1161 ret = open_for_data(cdi); 1162 if (ret) 1163 goto err; 1164 cdrom_mmc3_profile(cdi); 1165 if (mode & FMODE_WRITE) { 1166 ret = -EROFS; 1167 if (cdrom_open_write(cdi)) 1168 goto err_release; 1169 if (!CDROM_CAN(CDC_RAM)) 1170 goto err_release; 1171 ret = 0; 1172 cdi->media_written = 0; 1173 } 1174 } 1175 1176 if (ret) 1177 goto err; 1178 1179 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1180 cdi->name, cdi->use_count); 1181 return 0; 1182 err_release: 1183 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1184 cdi->ops->lock_door(cdi, 0); 1185 cd_dbg(CD_OPEN, "door unlocked\n"); 1186 } 1187 cdi->ops->release(cdi); 1188 err: 1189 cdi->use_count--; 1190 return ret; 1191 } 1192 1193 /* This code is similar to that in open_for_data. The routine is called 1194 whenever an audio play operation is requested. 1195 */ 1196 static int check_for_audio_disc(struct cdrom_device_info *cdi, 1197 const struct cdrom_device_ops *cdo) 1198 { 1199 int ret; 1200 tracktype tracks; 1201 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n"); 1202 if (!(cdi->options & CDO_CHECK_TYPE)) 1203 return 0; 1204 if (cdo->drive_status != NULL) { 1205 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1206 cd_dbg(CD_OPEN, "drive_status=%d\n", ret); 1207 if (ret == CDS_TRAY_OPEN) { 1208 cd_dbg(CD_OPEN, "the tray is open...\n"); 1209 /* can/may i close it? */ 1210 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1211 cdi->options & CDO_AUTO_CLOSE) { 1212 cd_dbg(CD_OPEN, "trying to close the tray\n"); 1213 ret=cdo->tray_move(cdi,0); 1214 if (ret) { 1215 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n"); 1216 /* Ignore the error from the low 1217 level driver. We don't care why it 1218 couldn't close the tray. We only care 1219 that there is no disc in the drive, 1220 since that is the _REAL_ problem here.*/ 1221 return -ENOMEDIUM; 1222 } 1223 } else { 1224 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n"); 1225 return -ENOMEDIUM; 1226 } 1227 /* Ok, the door should be closed now.. Check again */ 1228 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1229 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1230 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n"); 1231 return -ENOMEDIUM; 1232 } 1233 if (ret!=CDS_DISC_OK) { 1234 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n"); 1235 return -EIO; 1236 } 1237 cd_dbg(CD_OPEN, "the tray is now closed\n"); 1238 } 1239 } 1240 cdrom_count_tracks(cdi, &tracks); 1241 if (tracks.error) 1242 return(tracks.error); 1243 1244 if (tracks.audio==0) 1245 return -EMEDIUMTYPE; 1246 1247 return 0; 1248 } 1249 1250 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode) 1251 { 1252 const struct cdrom_device_ops *cdo = cdi->ops; 1253 int opened_for_data; 1254 1255 cd_dbg(CD_CLOSE, "entering cdrom_release\n"); 1256 1257 if (cdi->use_count > 0) 1258 cdi->use_count--; 1259 1260 if (cdi->use_count == 0) { 1261 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", 1262 cdi->name); 1263 cdrom_dvd_rw_close_write(cdi); 1264 1265 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) { 1266 cd_dbg(CD_CLOSE, "Unlocking door!\n"); 1267 cdo->lock_door(cdi, 0); 1268 } 1269 } 1270 1271 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) || 1272 !(mode & FMODE_NDELAY); 1273 1274 /* 1275 * flush cache on last write release 1276 */ 1277 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data) 1278 cdrom_close_write(cdi); 1279 1280 cdo->release(cdi); 1281 if (cdi->use_count == 0) { /* last process that closes dev*/ 1282 if (opened_for_data && 1283 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY)) 1284 cdo->tray_move(cdi, 1); 1285 } 1286 } 1287 1288 static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 1289 struct cdrom_changer_info *buf) 1290 { 1291 struct packet_command cgc; 1292 const struct cdrom_device_ops *cdo = cdi->ops; 1293 int length; 1294 1295 /* 1296 * Sanyo changer isn't spec compliant (doesn't use regular change 1297 * LOAD_UNLOAD command, and it doesn't implement the mech status 1298 * command below 1299 */ 1300 if (cdi->sanyo_slot) { 1301 buf->hdr.nslots = 3; 1302 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot; 1303 for (length = 0; length < 3; length++) { 1304 buf->slots[length].disc_present = 1; 1305 buf->slots[length].change = 0; 1306 } 1307 return 0; 1308 } 1309 1310 length = sizeof(struct cdrom_mechstat_header) + 1311 cdi->capacity * sizeof(struct cdrom_slot); 1312 1313 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ); 1314 cgc.cmd[0] = GPCMD_MECHANISM_STATUS; 1315 cgc.cmd[8] = (length >> 8) & 0xff; 1316 cgc.cmd[9] = length & 0xff; 1317 return cdo->generic_packet(cdi, &cgc); 1318 } 1319 1320 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot) 1321 { 1322 struct cdrom_changer_info *info; 1323 int ret; 1324 1325 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n"); 1326 if (cdi->sanyo_slot) 1327 return CDS_NO_INFO; 1328 1329 info = kmalloc(sizeof(*info), GFP_KERNEL); 1330 if (!info) 1331 return -ENOMEM; 1332 1333 if ((ret = cdrom_read_mech_status(cdi, info))) 1334 goto out_free; 1335 1336 if (info->slots[slot].disc_present) 1337 ret = CDS_DISC_OK; 1338 else 1339 ret = CDS_NO_DISC; 1340 1341 out_free: 1342 kfree(info); 1343 return ret; 1344 } 1345 1346 /* Return the number of slots for an ATAPI/SCSI cdrom, 1347 * return 1 if not a changer. 1348 */ 1349 int cdrom_number_of_slots(struct cdrom_device_info *cdi) 1350 { 1351 int status; 1352 int nslots = 1; 1353 struct cdrom_changer_info *info; 1354 1355 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 1356 /* cdrom_read_mech_status requires a valid value for capacity: */ 1357 cdi->capacity = 0; 1358 1359 info = kmalloc(sizeof(*info), GFP_KERNEL); 1360 if (!info) 1361 return -ENOMEM; 1362 1363 if ((status = cdrom_read_mech_status(cdi, info)) == 0) 1364 nslots = info->hdr.nslots; 1365 1366 kfree(info); 1367 return nslots; 1368 } 1369 1370 1371 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */ 1372 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 1373 { 1374 struct packet_command cgc; 1375 1376 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n"); 1377 if (cdi->sanyo_slot && slot < 0) 1378 return 0; 1379 1380 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 1381 cgc.cmd[0] = GPCMD_LOAD_UNLOAD; 1382 cgc.cmd[4] = 2 + (slot >= 0); 1383 cgc.cmd[8] = slot; 1384 cgc.timeout = 60 * HZ; 1385 1386 /* The Sanyo 3 CD changer uses byte 7 of the 1387 GPCMD_TEST_UNIT_READY to command to switch CDs instead of 1388 using the GPCMD_LOAD_UNLOAD opcode. */ 1389 if (cdi->sanyo_slot && -1 < slot) { 1390 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 1391 cgc.cmd[7] = slot; 1392 cgc.cmd[4] = cgc.cmd[8] = 0; 1393 cdi->sanyo_slot = slot ? slot : 3; 1394 } 1395 1396 return cdi->ops->generic_packet(cdi, &cgc); 1397 } 1398 1399 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot) 1400 { 1401 struct cdrom_changer_info *info; 1402 int curslot; 1403 int ret; 1404 1405 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n"); 1406 if (!CDROM_CAN(CDC_SELECT_DISC)) 1407 return -EDRIVE_CANT_DO_THIS; 1408 1409 if (cdi->ops->check_events) 1410 cdi->ops->check_events(cdi, 0, slot); 1411 else 1412 cdi->ops->media_changed(cdi, slot); 1413 1414 if (slot == CDSL_NONE) { 1415 /* set media changed bits, on both queues */ 1416 cdi->mc_flags = 0x3; 1417 return cdrom_load_unload(cdi, -1); 1418 } 1419 1420 info = kmalloc(sizeof(*info), GFP_KERNEL); 1421 if (!info) 1422 return -ENOMEM; 1423 1424 if ((ret = cdrom_read_mech_status(cdi, info))) { 1425 kfree(info); 1426 return ret; 1427 } 1428 1429 curslot = info->hdr.curslot; 1430 kfree(info); 1431 1432 if (cdi->use_count > 1 || cdi->keeplocked) { 1433 if (slot == CDSL_CURRENT) { 1434 return curslot; 1435 } else { 1436 return -EBUSY; 1437 } 1438 } 1439 1440 /* Specifying CDSL_CURRENT will attempt to load the currnet slot, 1441 which is useful if it had been previously unloaded. 1442 Whether it can or not, it returns the current slot. 1443 Similarly, if slot happens to be the current one, we still 1444 try and load it. */ 1445 if (slot == CDSL_CURRENT) 1446 slot = curslot; 1447 1448 /* set media changed bits on both queues */ 1449 cdi->mc_flags = 0x3; 1450 if ((ret = cdrom_load_unload(cdi, slot))) 1451 return ret; 1452 1453 return slot; 1454 } 1455 1456 /* 1457 * As cdrom implements an extra ioctl consumer for media changed 1458 * event, it needs to buffer ->check_events() output, such that event 1459 * is not lost for both the usual VFS and ioctl paths. 1460 * cdi->{vfs|ioctl}_events are used to buffer pending events for each 1461 * path. 1462 * 1463 * XXX: Locking is non-existent. cdi->ops->check_events() can be 1464 * called in parallel and buffering fields are accessed without any 1465 * exclusion. The original media_changed code had the same problem. 1466 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl 1467 * and remove this cruft altogether. It doesn't have much usefulness 1468 * at this point. 1469 */ 1470 static void cdrom_update_events(struct cdrom_device_info *cdi, 1471 unsigned int clearing) 1472 { 1473 unsigned int events; 1474 1475 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT); 1476 cdi->vfs_events |= events; 1477 cdi->ioctl_events |= events; 1478 } 1479 1480 unsigned int cdrom_check_events(struct cdrom_device_info *cdi, 1481 unsigned int clearing) 1482 { 1483 unsigned int events; 1484 1485 cdrom_update_events(cdi, clearing); 1486 events = cdi->vfs_events; 1487 cdi->vfs_events = 0; 1488 return events; 1489 } 1490 EXPORT_SYMBOL(cdrom_check_events); 1491 1492 /* We want to make media_changed accessible to the user through an 1493 * ioctl. The main problem now is that we must double-buffer the 1494 * low-level implementation, to assure that the VFS and the user both 1495 * see a medium change once. 1496 */ 1497 1498 static 1499 int media_changed(struct cdrom_device_info *cdi, int queue) 1500 { 1501 unsigned int mask = (1 << (queue & 1)); 1502 int ret = !!(cdi->mc_flags & mask); 1503 bool changed; 1504 1505 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1506 return ret; 1507 1508 /* changed since last call? */ 1509 if (cdi->ops->check_events) { 1510 BUG_ON(!queue); /* shouldn't be called from VFS path */ 1511 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE); 1512 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE; 1513 cdi->ioctl_events = 0; 1514 } else 1515 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT); 1516 1517 if (changed) { 1518 cdi->mc_flags = 0x3; /* set bit on both queues */ 1519 ret |= 1; 1520 cdi->media_written = 0; 1521 } 1522 1523 cdi->mc_flags &= ~mask; /* clear bit */ 1524 return ret; 1525 } 1526 1527 int cdrom_media_changed(struct cdrom_device_info *cdi) 1528 { 1529 /* This talks to the VFS, which doesn't like errors - just 1 or 0. 1530 * Returning "0" is always safe (media hasn't been changed). Do that 1531 * if the low-level cdrom driver dosn't support media changed. */ 1532 if (cdi == NULL || cdi->ops->media_changed == NULL) 1533 return 0; 1534 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1535 return 0; 1536 return media_changed(cdi, 0); 1537 } 1538 1539 /* Requests to the low-level drivers will /always/ be done in the 1540 following format convention: 1541 1542 CDROM_LBA: all data-related requests. 1543 CDROM_MSF: all audio-related requests. 1544 1545 However, a low-level implementation is allowed to refuse this 1546 request, and return information in its own favorite format. 1547 1548 It doesn't make sense /at all/ to ask for a play_audio in LBA 1549 format, or ask for multi-session info in MSF format. However, for 1550 backward compatibility these format requests will be satisfied, but 1551 the requests to the low-level drivers will be sanitized in the more 1552 meaningful format indicated above. 1553 */ 1554 1555 static 1556 void sanitize_format(union cdrom_addr *addr, 1557 u_char * curr, u_char requested) 1558 { 1559 if (*curr == requested) 1560 return; /* nothing to be done! */ 1561 if (requested == CDROM_LBA) { 1562 addr->lba = (int) addr->msf.frame + 1563 75 * (addr->msf.second - 2 + 60 * addr->msf.minute); 1564 } else { /* CDROM_MSF */ 1565 int lba = addr->lba; 1566 addr->msf.frame = lba % 75; 1567 lba /= 75; 1568 lba += 2; 1569 addr->msf.second = lba % 60; 1570 addr->msf.minute = lba / 60; 1571 } 1572 *curr = requested; 1573 } 1574 1575 void init_cdrom_command(struct packet_command *cgc, void *buf, int len, 1576 int type) 1577 { 1578 memset(cgc, 0, sizeof(struct packet_command)); 1579 if (buf) 1580 memset(buf, 0, len); 1581 cgc->buffer = (char *) buf; 1582 cgc->buflen = len; 1583 cgc->data_direction = type; 1584 cgc->timeout = CDROM_DEF_TIMEOUT; 1585 } 1586 1587 /* DVD handling */ 1588 1589 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) 1590 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) 1591 1592 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type) 1593 { 1594 cgc->cmd[0] = GPCMD_REPORT_KEY; 1595 cgc->cmd[10] = type | (agid << 6); 1596 switch (type) { 1597 case 0: case 8: case 5: { 1598 cgc->buflen = 8; 1599 break; 1600 } 1601 case 1: { 1602 cgc->buflen = 16; 1603 break; 1604 } 1605 case 2: case 4: { 1606 cgc->buflen = 12; 1607 break; 1608 } 1609 } 1610 cgc->cmd[9] = cgc->buflen; 1611 cgc->data_direction = CGC_DATA_READ; 1612 } 1613 1614 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type) 1615 { 1616 cgc->cmd[0] = GPCMD_SEND_KEY; 1617 cgc->cmd[10] = type | (agid << 6); 1618 switch (type) { 1619 case 1: { 1620 cgc->buflen = 16; 1621 break; 1622 } 1623 case 3: { 1624 cgc->buflen = 12; 1625 break; 1626 } 1627 case 6: { 1628 cgc->buflen = 8; 1629 break; 1630 } 1631 } 1632 cgc->cmd[9] = cgc->buflen; 1633 cgc->data_direction = CGC_DATA_WRITE; 1634 } 1635 1636 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai) 1637 { 1638 int ret; 1639 u_char buf[20]; 1640 struct packet_command cgc; 1641 const struct cdrom_device_ops *cdo = cdi->ops; 1642 rpc_state_t rpc_state; 1643 1644 memset(buf, 0, sizeof(buf)); 1645 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ); 1646 1647 switch (ai->type) { 1648 /* LU data send */ 1649 case DVD_LU_SEND_AGID: 1650 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n"); 1651 cgc.quiet = 1; 1652 setup_report_key(&cgc, ai->lsa.agid, 0); 1653 1654 if ((ret = cdo->generic_packet(cdi, &cgc))) 1655 return ret; 1656 1657 ai->lsa.agid = buf[7] >> 6; 1658 /* Returning data, let host change state */ 1659 break; 1660 1661 case DVD_LU_SEND_KEY1: 1662 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n"); 1663 setup_report_key(&cgc, ai->lsk.agid, 2); 1664 1665 if ((ret = cdo->generic_packet(cdi, &cgc))) 1666 return ret; 1667 1668 copy_key(ai->lsk.key, &buf[4]); 1669 /* Returning data, let host change state */ 1670 break; 1671 1672 case DVD_LU_SEND_CHALLENGE: 1673 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n"); 1674 setup_report_key(&cgc, ai->lsc.agid, 1); 1675 1676 if ((ret = cdo->generic_packet(cdi, &cgc))) 1677 return ret; 1678 1679 copy_chal(ai->lsc.chal, &buf[4]); 1680 /* Returning data, let host change state */ 1681 break; 1682 1683 /* Post-auth key */ 1684 case DVD_LU_SEND_TITLE_KEY: 1685 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n"); 1686 cgc.quiet = 1; 1687 setup_report_key(&cgc, ai->lstk.agid, 4); 1688 cgc.cmd[5] = ai->lstk.lba; 1689 cgc.cmd[4] = ai->lstk.lba >> 8; 1690 cgc.cmd[3] = ai->lstk.lba >> 16; 1691 cgc.cmd[2] = ai->lstk.lba >> 24; 1692 1693 if ((ret = cdo->generic_packet(cdi, &cgc))) 1694 return ret; 1695 1696 ai->lstk.cpm = (buf[4] >> 7) & 1; 1697 ai->lstk.cp_sec = (buf[4] >> 6) & 1; 1698 ai->lstk.cgms = (buf[4] >> 4) & 3; 1699 copy_key(ai->lstk.title_key, &buf[5]); 1700 /* Returning data, let host change state */ 1701 break; 1702 1703 case DVD_LU_SEND_ASF: 1704 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n"); 1705 setup_report_key(&cgc, ai->lsasf.agid, 5); 1706 1707 if ((ret = cdo->generic_packet(cdi, &cgc))) 1708 return ret; 1709 1710 ai->lsasf.asf = buf[7] & 1; 1711 break; 1712 1713 /* LU data receive (LU changes state) */ 1714 case DVD_HOST_SEND_CHALLENGE: 1715 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n"); 1716 setup_send_key(&cgc, ai->hsc.agid, 1); 1717 buf[1] = 0xe; 1718 copy_chal(&buf[4], ai->hsc.chal); 1719 1720 if ((ret = cdo->generic_packet(cdi, &cgc))) 1721 return ret; 1722 1723 ai->type = DVD_LU_SEND_KEY1; 1724 break; 1725 1726 case DVD_HOST_SEND_KEY2: 1727 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n"); 1728 setup_send_key(&cgc, ai->hsk.agid, 3); 1729 buf[1] = 0xa; 1730 copy_key(&buf[4], ai->hsk.key); 1731 1732 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1733 ai->type = DVD_AUTH_FAILURE; 1734 return ret; 1735 } 1736 ai->type = DVD_AUTH_ESTABLISHED; 1737 break; 1738 1739 /* Misc */ 1740 case DVD_INVALIDATE_AGID: 1741 cgc.quiet = 1; 1742 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n"); 1743 setup_report_key(&cgc, ai->lsa.agid, 0x3f); 1744 if ((ret = cdo->generic_packet(cdi, &cgc))) 1745 return ret; 1746 break; 1747 1748 /* Get region settings */ 1749 case DVD_LU_SEND_RPC_STATE: 1750 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n"); 1751 setup_report_key(&cgc, 0, 8); 1752 memset(&rpc_state, 0, sizeof(rpc_state_t)); 1753 cgc.buffer = (char *) &rpc_state; 1754 1755 if ((ret = cdo->generic_packet(cdi, &cgc))) 1756 return ret; 1757 1758 ai->lrpcs.type = rpc_state.type_code; 1759 ai->lrpcs.vra = rpc_state.vra; 1760 ai->lrpcs.ucca = rpc_state.ucca; 1761 ai->lrpcs.region_mask = rpc_state.region_mask; 1762 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; 1763 break; 1764 1765 /* Set region settings */ 1766 case DVD_HOST_SEND_RPC_STATE: 1767 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n"); 1768 setup_send_key(&cgc, 0, 6); 1769 buf[1] = 6; 1770 buf[4] = ai->hrpcs.pdrc; 1771 1772 if ((ret = cdo->generic_packet(cdi, &cgc))) 1773 return ret; 1774 break; 1775 1776 default: 1777 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type); 1778 return -ENOTTY; 1779 } 1780 1781 return 0; 1782 } 1783 1784 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s, 1785 struct packet_command *cgc) 1786 { 1787 unsigned char buf[21], *base; 1788 struct dvd_layer *layer; 1789 const struct cdrom_device_ops *cdo = cdi->ops; 1790 int ret, layer_num = s->physical.layer_num; 1791 1792 if (layer_num >= DVD_LAYERS) 1793 return -EINVAL; 1794 1795 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1796 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1797 cgc->cmd[6] = layer_num; 1798 cgc->cmd[7] = s->type; 1799 cgc->cmd[9] = cgc->buflen & 0xff; 1800 1801 /* 1802 * refrain from reporting errors on non-existing layers (mainly) 1803 */ 1804 cgc->quiet = 1; 1805 1806 ret = cdo->generic_packet(cdi, cgc); 1807 if (ret) 1808 return ret; 1809 1810 base = &buf[4]; 1811 layer = &s->physical.layer[layer_num]; 1812 1813 /* 1814 * place the data... really ugly, but at least we won't have to 1815 * worry about endianess in userspace. 1816 */ 1817 memset(layer, 0, sizeof(*layer)); 1818 layer->book_version = base[0] & 0xf; 1819 layer->book_type = base[0] >> 4; 1820 layer->min_rate = base[1] & 0xf; 1821 layer->disc_size = base[1] >> 4; 1822 layer->layer_type = base[2] & 0xf; 1823 layer->track_path = (base[2] >> 4) & 1; 1824 layer->nlayers = (base[2] >> 5) & 3; 1825 layer->track_density = base[3] & 0xf; 1826 layer->linear_density = base[3] >> 4; 1827 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7]; 1828 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11]; 1829 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15]; 1830 layer->bca = base[16] >> 7; 1831 1832 return 0; 1833 } 1834 1835 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s, 1836 struct packet_command *cgc) 1837 { 1838 int ret; 1839 u_char buf[8]; 1840 const struct cdrom_device_ops *cdo = cdi->ops; 1841 1842 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1843 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1844 cgc->cmd[6] = s->copyright.layer_num; 1845 cgc->cmd[7] = s->type; 1846 cgc->cmd[8] = cgc->buflen >> 8; 1847 cgc->cmd[9] = cgc->buflen & 0xff; 1848 1849 ret = cdo->generic_packet(cdi, cgc); 1850 if (ret) 1851 return ret; 1852 1853 s->copyright.cpst = buf[4]; 1854 s->copyright.rmi = buf[5]; 1855 1856 return 0; 1857 } 1858 1859 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s, 1860 struct packet_command *cgc) 1861 { 1862 int ret, size; 1863 u_char *buf; 1864 const struct cdrom_device_ops *cdo = cdi->ops; 1865 1866 size = sizeof(s->disckey.value) + 4; 1867 1868 buf = kmalloc(size, GFP_KERNEL); 1869 if (!buf) 1870 return -ENOMEM; 1871 1872 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1873 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1874 cgc->cmd[7] = s->type; 1875 cgc->cmd[8] = size >> 8; 1876 cgc->cmd[9] = size & 0xff; 1877 cgc->cmd[10] = s->disckey.agid << 6; 1878 1879 ret = cdo->generic_packet(cdi, cgc); 1880 if (!ret) 1881 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value)); 1882 1883 kfree(buf); 1884 return ret; 1885 } 1886 1887 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s, 1888 struct packet_command *cgc) 1889 { 1890 int ret, size = 4 + 188; 1891 u_char *buf; 1892 const struct cdrom_device_ops *cdo = cdi->ops; 1893 1894 buf = kmalloc(size, GFP_KERNEL); 1895 if (!buf) 1896 return -ENOMEM; 1897 1898 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1899 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1900 cgc->cmd[7] = s->type; 1901 cgc->cmd[9] = cgc->buflen & 0xff; 1902 1903 ret = cdo->generic_packet(cdi, cgc); 1904 if (ret) 1905 goto out; 1906 1907 s->bca.len = buf[0] << 8 | buf[1]; 1908 if (s->bca.len < 12 || s->bca.len > 188) { 1909 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n", 1910 s->bca.len); 1911 ret = -EIO; 1912 goto out; 1913 } 1914 memcpy(s->bca.value, &buf[4], s->bca.len); 1915 ret = 0; 1916 out: 1917 kfree(buf); 1918 return ret; 1919 } 1920 1921 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s, 1922 struct packet_command *cgc) 1923 { 1924 int ret = 0, size; 1925 u_char *buf; 1926 const struct cdrom_device_ops *cdo = cdi->ops; 1927 1928 size = sizeof(s->manufact.value) + 4; 1929 1930 buf = kmalloc(size, GFP_KERNEL); 1931 if (!buf) 1932 return -ENOMEM; 1933 1934 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1935 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1936 cgc->cmd[7] = s->type; 1937 cgc->cmd[8] = size >> 8; 1938 cgc->cmd[9] = size & 0xff; 1939 1940 ret = cdo->generic_packet(cdi, cgc); 1941 if (ret) 1942 goto out; 1943 1944 s->manufact.len = buf[0] << 8 | buf[1]; 1945 if (s->manufact.len < 0) { 1946 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n", 1947 s->manufact.len); 1948 ret = -EIO; 1949 } else { 1950 if (s->manufact.len > 2048) { 1951 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n", 1952 s->manufact.len); 1953 s->manufact.len = 2048; 1954 } 1955 memcpy(s->manufact.value, &buf[4], s->manufact.len); 1956 } 1957 1958 out: 1959 kfree(buf); 1960 return ret; 1961 } 1962 1963 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s, 1964 struct packet_command *cgc) 1965 { 1966 switch (s->type) { 1967 case DVD_STRUCT_PHYSICAL: 1968 return dvd_read_physical(cdi, s, cgc); 1969 1970 case DVD_STRUCT_COPYRIGHT: 1971 return dvd_read_copyright(cdi, s, cgc); 1972 1973 case DVD_STRUCT_DISCKEY: 1974 return dvd_read_disckey(cdi, s, cgc); 1975 1976 case DVD_STRUCT_BCA: 1977 return dvd_read_bca(cdi, s, cgc); 1978 1979 case DVD_STRUCT_MANUFACT: 1980 return dvd_read_manufact(cdi, s, cgc); 1981 1982 default: 1983 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n", 1984 s->type); 1985 return -EINVAL; 1986 } 1987 } 1988 1989 int cdrom_mode_sense(struct cdrom_device_info *cdi, 1990 struct packet_command *cgc, 1991 int page_code, int page_control) 1992 { 1993 const struct cdrom_device_ops *cdo = cdi->ops; 1994 1995 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1996 1997 cgc->cmd[0] = GPCMD_MODE_SENSE_10; 1998 cgc->cmd[2] = page_code | (page_control << 6); 1999 cgc->cmd[7] = cgc->buflen >> 8; 2000 cgc->cmd[8] = cgc->buflen & 0xff; 2001 cgc->data_direction = CGC_DATA_READ; 2002 return cdo->generic_packet(cdi, cgc); 2003 } 2004 2005 int cdrom_mode_select(struct cdrom_device_info *cdi, 2006 struct packet_command *cgc) 2007 { 2008 const struct cdrom_device_ops *cdo = cdi->ops; 2009 2010 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 2011 memset(cgc->buffer, 0, 2); 2012 cgc->cmd[0] = GPCMD_MODE_SELECT_10; 2013 cgc->cmd[1] = 0x10; /* PF */ 2014 cgc->cmd[7] = cgc->buflen >> 8; 2015 cgc->cmd[8] = cgc->buflen & 0xff; 2016 cgc->data_direction = CGC_DATA_WRITE; 2017 return cdo->generic_packet(cdi, cgc); 2018 } 2019 2020 static int cdrom_read_subchannel(struct cdrom_device_info *cdi, 2021 struct cdrom_subchnl *subchnl, int mcn) 2022 { 2023 const struct cdrom_device_ops *cdo = cdi->ops; 2024 struct packet_command cgc; 2025 char buffer[32]; 2026 int ret; 2027 2028 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ); 2029 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 2030 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */ 2031 cgc.cmd[2] = 0x40; /* request subQ data */ 2032 cgc.cmd[3] = mcn ? 2 : 1; 2033 cgc.cmd[8] = 16; 2034 2035 if ((ret = cdo->generic_packet(cdi, &cgc))) 2036 return ret; 2037 2038 subchnl->cdsc_audiostatus = cgc.buffer[1]; 2039 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf; 2040 subchnl->cdsc_trk = cgc.buffer[6]; 2041 subchnl->cdsc_ind = cgc.buffer[7]; 2042 2043 if (subchnl->cdsc_format == CDROM_LBA) { 2044 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) | 2045 (cgc.buffer[9] << 16) | 2046 (cgc.buffer[10] << 8) | 2047 (cgc.buffer[11])); 2048 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) | 2049 (cgc.buffer[13] << 16) | 2050 (cgc.buffer[14] << 8) | 2051 (cgc.buffer[15])); 2052 } else { 2053 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13]; 2054 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14]; 2055 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15]; 2056 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9]; 2057 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10]; 2058 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11]; 2059 } 2060 2061 return 0; 2062 } 2063 2064 /* 2065 * Specific READ_10 interface 2066 */ 2067 static int cdrom_read_cd(struct cdrom_device_info *cdi, 2068 struct packet_command *cgc, int lba, 2069 int blocksize, int nblocks) 2070 { 2071 const struct cdrom_device_ops *cdo = cdi->ops; 2072 2073 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2074 cgc->cmd[0] = GPCMD_READ_10; 2075 cgc->cmd[2] = (lba >> 24) & 0xff; 2076 cgc->cmd[3] = (lba >> 16) & 0xff; 2077 cgc->cmd[4] = (lba >> 8) & 0xff; 2078 cgc->cmd[5] = lba & 0xff; 2079 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2080 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2081 cgc->cmd[8] = nblocks & 0xff; 2082 cgc->buflen = blocksize * nblocks; 2083 return cdo->generic_packet(cdi, cgc); 2084 } 2085 2086 /* very generic interface for reading the various types of blocks */ 2087 static int cdrom_read_block(struct cdrom_device_info *cdi, 2088 struct packet_command *cgc, 2089 int lba, int nblocks, int format, int blksize) 2090 { 2091 const struct cdrom_device_ops *cdo = cdi->ops; 2092 2093 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2094 cgc->cmd[0] = GPCMD_READ_CD; 2095 /* expected sector size - cdda,mode1,etc. */ 2096 cgc->cmd[1] = format << 2; 2097 /* starting address */ 2098 cgc->cmd[2] = (lba >> 24) & 0xff; 2099 cgc->cmd[3] = (lba >> 16) & 0xff; 2100 cgc->cmd[4] = (lba >> 8) & 0xff; 2101 cgc->cmd[5] = lba & 0xff; 2102 /* number of blocks */ 2103 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2104 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2105 cgc->cmd[8] = nblocks & 0xff; 2106 cgc->buflen = blksize * nblocks; 2107 2108 /* set the header info returned */ 2109 switch (blksize) { 2110 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break; 2111 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break; 2112 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break; 2113 default : cgc->cmd[9] = 0x10; 2114 } 2115 2116 return cdo->generic_packet(cdi, cgc); 2117 } 2118 2119 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2120 int lba, int nframes) 2121 { 2122 struct packet_command cgc; 2123 int ret = 0; 2124 int nr; 2125 2126 cdi->last_sense = 0; 2127 2128 memset(&cgc, 0, sizeof(cgc)); 2129 2130 /* 2131 * start with will ra.nframes size, back down if alloc fails 2132 */ 2133 nr = nframes; 2134 do { 2135 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL); 2136 if (cgc.buffer) 2137 break; 2138 2139 nr >>= 1; 2140 } while (nr); 2141 2142 if (!nr) 2143 return -ENOMEM; 2144 2145 cgc.data_direction = CGC_DATA_READ; 2146 while (nframes > 0) { 2147 if (nr > nframes) 2148 nr = nframes; 2149 2150 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW); 2151 if (ret) 2152 break; 2153 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) { 2154 ret = -EFAULT; 2155 break; 2156 } 2157 ubuf += CD_FRAMESIZE_RAW * nr; 2158 nframes -= nr; 2159 lba += nr; 2160 } 2161 kfree(cgc.buffer); 2162 return ret; 2163 } 2164 2165 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2166 int lba, int nframes) 2167 { 2168 struct request_queue *q = cdi->disk->queue; 2169 struct request *rq; 2170 struct scsi_request *req; 2171 struct bio *bio; 2172 unsigned int len; 2173 int nr, ret = 0; 2174 2175 if (!q) 2176 return -ENXIO; 2177 2178 if (!blk_queue_scsi_passthrough(q)) { 2179 WARN_ONCE(true, 2180 "Attempt read CDDA info through a non-SCSI queue\n"); 2181 return -EINVAL; 2182 } 2183 2184 cdi->last_sense = 0; 2185 2186 while (nframes) { 2187 nr = nframes; 2188 if (cdi->cdda_method == CDDA_BPC_SINGLE) 2189 nr = 1; 2190 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9)) 2191 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW; 2192 2193 len = nr * CD_FRAMESIZE_RAW; 2194 2195 rq = blk_get_request(q, REQ_OP_SCSI_IN, 0); 2196 if (IS_ERR(rq)) { 2197 ret = PTR_ERR(rq); 2198 break; 2199 } 2200 req = scsi_req(rq); 2201 2202 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL); 2203 if (ret) { 2204 blk_put_request(rq); 2205 break; 2206 } 2207 2208 req->cmd[0] = GPCMD_READ_CD; 2209 req->cmd[1] = 1 << 2; 2210 req->cmd[2] = (lba >> 24) & 0xff; 2211 req->cmd[3] = (lba >> 16) & 0xff; 2212 req->cmd[4] = (lba >> 8) & 0xff; 2213 req->cmd[5] = lba & 0xff; 2214 req->cmd[6] = (nr >> 16) & 0xff; 2215 req->cmd[7] = (nr >> 8) & 0xff; 2216 req->cmd[8] = nr & 0xff; 2217 req->cmd[9] = 0xf8; 2218 2219 req->cmd_len = 12; 2220 rq->timeout = 60 * HZ; 2221 bio = rq->bio; 2222 2223 blk_execute_rq(q, cdi->disk, rq, 0); 2224 if (scsi_req(rq)->result) { 2225 struct scsi_sense_hdr sshdr; 2226 2227 ret = -EIO; 2228 scsi_normalize_sense(req->sense, req->sense_len, 2229 &sshdr); 2230 cdi->last_sense = sshdr.sense_key; 2231 } 2232 2233 if (blk_rq_unmap_user(bio)) 2234 ret = -EFAULT; 2235 blk_put_request(rq); 2236 2237 if (ret) 2238 break; 2239 2240 nframes -= nr; 2241 lba += nr; 2242 ubuf += len; 2243 } 2244 2245 return ret; 2246 } 2247 2248 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2249 int lba, int nframes) 2250 { 2251 int ret; 2252 2253 if (cdi->cdda_method == CDDA_OLD) 2254 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2255 2256 retry: 2257 /* 2258 * for anything else than success and io error, we need to retry 2259 */ 2260 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes); 2261 if (!ret || ret != -EIO) 2262 return ret; 2263 2264 /* 2265 * I've seen drives get sense 4/8/3 udma crc errors on multi 2266 * frame dma, so drop to single frame dma if we need to 2267 */ 2268 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) { 2269 pr_info("dropping to single frame dma\n"); 2270 cdi->cdda_method = CDDA_BPC_SINGLE; 2271 goto retry; 2272 } 2273 2274 /* 2275 * so we have an io error of some sort with multi frame dma. if the 2276 * condition wasn't a hardware error 2277 * problems, not for any error 2278 */ 2279 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b) 2280 return ret; 2281 2282 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense); 2283 cdi->cdda_method = CDDA_OLD; 2284 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2285 } 2286 2287 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi, 2288 void __user *argp) 2289 { 2290 struct cdrom_multisession ms_info; 2291 u8 requested_format; 2292 int ret; 2293 2294 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n"); 2295 2296 if (!(cdi->ops->capability & CDC_MULTI_SESSION)) 2297 return -ENOSYS; 2298 2299 if (copy_from_user(&ms_info, argp, sizeof(ms_info))) 2300 return -EFAULT; 2301 2302 requested_format = ms_info.addr_format; 2303 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2304 return -EINVAL; 2305 ms_info.addr_format = CDROM_LBA; 2306 2307 ret = cdi->ops->get_last_session(cdi, &ms_info); 2308 if (ret) 2309 return ret; 2310 2311 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format); 2312 2313 if (copy_to_user(argp, &ms_info, sizeof(ms_info))) 2314 return -EFAULT; 2315 2316 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n"); 2317 return 0; 2318 } 2319 2320 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi) 2321 { 2322 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n"); 2323 2324 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2325 return -ENOSYS; 2326 if (cdi->use_count != 1 || cdi->keeplocked) 2327 return -EBUSY; 2328 if (CDROM_CAN(CDC_LOCK)) { 2329 int ret = cdi->ops->lock_door(cdi, 0); 2330 if (ret) 2331 return ret; 2332 } 2333 2334 return cdi->ops->tray_move(cdi, 1); 2335 } 2336 2337 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi) 2338 { 2339 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n"); 2340 2341 if (!CDROM_CAN(CDC_CLOSE_TRAY)) 2342 return -ENOSYS; 2343 return cdi->ops->tray_move(cdi, 0); 2344 } 2345 2346 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi, 2347 unsigned long arg) 2348 { 2349 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n"); 2350 2351 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2352 return -ENOSYS; 2353 if (cdi->keeplocked) 2354 return -EBUSY; 2355 2356 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT); 2357 if (arg) 2358 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT; 2359 return 0; 2360 } 2361 2362 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, 2363 unsigned long arg) 2364 { 2365 struct cdrom_changer_info *info; 2366 int ret; 2367 2368 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 2369 2370 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2371 return -ENOSYS; 2372 2373 /* cannot select disc or select current disc */ 2374 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) 2375 return media_changed(cdi, 1); 2376 2377 if (arg >= cdi->capacity) 2378 return -EINVAL; 2379 2380 info = kmalloc(sizeof(*info), GFP_KERNEL); 2381 if (!info) 2382 return -ENOMEM; 2383 2384 ret = cdrom_read_mech_status(cdi, info); 2385 if (!ret) 2386 ret = info->slots[arg].change; 2387 kfree(info); 2388 return ret; 2389 } 2390 2391 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi, 2392 unsigned long arg) 2393 { 2394 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n"); 2395 2396 /* 2397 * Options need to be in sync with capability. 2398 * Too late for that, so we have to check each one separately. 2399 */ 2400 switch (arg) { 2401 case CDO_USE_FFLAGS: 2402 case CDO_CHECK_TYPE: 2403 break; 2404 case CDO_LOCK: 2405 if (!CDROM_CAN(CDC_LOCK)) 2406 return -ENOSYS; 2407 break; 2408 case 0: 2409 return cdi->options; 2410 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */ 2411 default: 2412 if (!CDROM_CAN(arg)) 2413 return -ENOSYS; 2414 } 2415 cdi->options |= (int) arg; 2416 return cdi->options; 2417 } 2418 2419 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi, 2420 unsigned long arg) 2421 { 2422 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n"); 2423 2424 cdi->options &= ~(int) arg; 2425 return cdi->options; 2426 } 2427 2428 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi, 2429 unsigned long arg) 2430 { 2431 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n"); 2432 2433 if (!CDROM_CAN(CDC_SELECT_SPEED)) 2434 return -ENOSYS; 2435 return cdi->ops->select_speed(cdi, arg); 2436 } 2437 2438 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, 2439 unsigned long arg) 2440 { 2441 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n"); 2442 2443 if (!CDROM_CAN(CDC_SELECT_DISC)) 2444 return -ENOSYS; 2445 2446 if (arg != CDSL_CURRENT && arg != CDSL_NONE) { 2447 if (arg >= cdi->capacity) 2448 return -EINVAL; 2449 } 2450 2451 /* 2452 * ->select_disc is a hook to allow a driver-specific way of 2453 * seleting disc. However, since there is no equivalent hook for 2454 * cdrom_slot_status this may not actually be useful... 2455 */ 2456 if (cdi->ops->select_disc) 2457 return cdi->ops->select_disc(cdi, arg); 2458 2459 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n"); 2460 return cdrom_select_disc(cdi, arg); 2461 } 2462 2463 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi, 2464 struct block_device *bdev) 2465 { 2466 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n"); 2467 2468 if (!capable(CAP_SYS_ADMIN)) 2469 return -EACCES; 2470 if (!CDROM_CAN(CDC_RESET)) 2471 return -ENOSYS; 2472 invalidate_bdev(bdev); 2473 return cdi->ops->reset(cdi); 2474 } 2475 2476 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi, 2477 unsigned long arg) 2478 { 2479 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl"); 2480 2481 if (!CDROM_CAN(CDC_LOCK)) 2482 return -EDRIVE_CANT_DO_THIS; 2483 2484 cdi->keeplocked = arg ? 1 : 0; 2485 2486 /* 2487 * Don't unlock the door on multiple opens by default, but allow 2488 * root to do so. 2489 */ 2490 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN)) 2491 return -EBUSY; 2492 return cdi->ops->lock_door(cdi, arg); 2493 } 2494 2495 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi, 2496 unsigned long arg) 2497 { 2498 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis"); 2499 2500 if (!capable(CAP_SYS_ADMIN)) 2501 return -EACCES; 2502 debug = arg ? 1 : 0; 2503 return debug; 2504 } 2505 2506 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi) 2507 { 2508 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n"); 2509 return (cdi->ops->capability & ~cdi->mask); 2510 } 2511 2512 /* 2513 * The following function is implemented, although very few audio 2514 * discs give Universal Product Code information, which should just be 2515 * the Medium Catalog Number on the box. Note, that the way the code 2516 * is written on the CD is /not/ uniform across all discs! 2517 */ 2518 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi, 2519 void __user *argp) 2520 { 2521 struct cdrom_mcn mcn; 2522 int ret; 2523 2524 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n"); 2525 2526 if (!(cdi->ops->capability & CDC_MCN)) 2527 return -ENOSYS; 2528 ret = cdi->ops->get_mcn(cdi, &mcn); 2529 if (ret) 2530 return ret; 2531 2532 if (copy_to_user(argp, &mcn, sizeof(mcn))) 2533 return -EFAULT; 2534 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n"); 2535 return 0; 2536 } 2537 2538 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi, 2539 unsigned long arg) 2540 { 2541 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n"); 2542 2543 if (!(cdi->ops->capability & CDC_DRIVE_STATUS)) 2544 return -ENOSYS; 2545 if (!CDROM_CAN(CDC_SELECT_DISC) || 2546 (arg == CDSL_CURRENT || arg == CDSL_NONE)) 2547 return cdi->ops->drive_status(cdi, CDSL_CURRENT); 2548 if (arg >= cdi->capacity) 2549 return -EINVAL; 2550 return cdrom_slot_status(cdi, arg); 2551 } 2552 2553 /* 2554 * Ok, this is where problems start. The current interface for the 2555 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that 2556 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this 2557 * is often the case, it is also very common for CDs to have some tracks 2558 * with data, and some tracks with audio. Just because I feel like it, 2559 * I declare the following to be the best way to cope. If the CD has ANY 2560 * data tracks on it, it will be returned as a data CD. If it has any XA 2561 * tracks, I will return it as that. Now I could simplify this interface 2562 * by combining these returns with the above, but this more clearly 2563 * demonstrates the problem with the current interface. Too bad this 2564 * wasn't designed to use bitmasks... -Erik 2565 * 2566 * Well, now we have the option CDS_MIXED: a mixed-type CD. 2567 * User level programmers might feel the ioctl is not very useful. 2568 * ---david 2569 */ 2570 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi) 2571 { 2572 tracktype tracks; 2573 2574 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n"); 2575 2576 cdrom_count_tracks(cdi, &tracks); 2577 if (tracks.error) 2578 return tracks.error; 2579 2580 /* Policy mode on */ 2581 if (tracks.audio > 0) { 2582 if (!tracks.data && !tracks.cdi && !tracks.xa) 2583 return CDS_AUDIO; 2584 else 2585 return CDS_MIXED; 2586 } 2587 2588 if (tracks.cdi > 0) 2589 return CDS_XA_2_2; 2590 if (tracks.xa > 0) 2591 return CDS_XA_2_1; 2592 if (tracks.data > 0) 2593 return CDS_DATA_1; 2594 /* Policy mode off */ 2595 2596 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n"); 2597 return CDS_NO_INFO; 2598 } 2599 2600 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi) 2601 { 2602 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n"); 2603 return cdi->capacity; 2604 } 2605 2606 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi, 2607 void __user *argp) 2608 { 2609 struct cdrom_subchnl q; 2610 u8 requested, back; 2611 int ret; 2612 2613 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/ 2614 2615 if (copy_from_user(&q, argp, sizeof(q))) 2616 return -EFAULT; 2617 2618 requested = q.cdsc_format; 2619 if (requested != CDROM_MSF && requested != CDROM_LBA) 2620 return -EINVAL; 2621 q.cdsc_format = CDROM_MSF; 2622 2623 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q); 2624 if (ret) 2625 return ret; 2626 2627 back = q.cdsc_format; /* local copy */ 2628 sanitize_format(&q.cdsc_absaddr, &back, requested); 2629 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2630 2631 if (copy_to_user(argp, &q, sizeof(q))) 2632 return -EFAULT; 2633 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2634 return 0; 2635 } 2636 2637 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 2638 void __user *argp) 2639 { 2640 struct cdrom_tochdr header; 2641 int ret; 2642 2643 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */ 2644 2645 if (copy_from_user(&header, argp, sizeof(header))) 2646 return -EFAULT; 2647 2648 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 2649 if (ret) 2650 return ret; 2651 2652 if (copy_to_user(argp, &header, sizeof(header))) 2653 return -EFAULT; 2654 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */ 2655 return 0; 2656 } 2657 2658 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi, 2659 void __user *argp) 2660 { 2661 struct cdrom_tocentry entry; 2662 u8 requested_format; 2663 int ret; 2664 2665 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */ 2666 2667 if (copy_from_user(&entry, argp, sizeof(entry))) 2668 return -EFAULT; 2669 2670 requested_format = entry.cdte_format; 2671 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2672 return -EINVAL; 2673 /* make interface to low-level uniform */ 2674 entry.cdte_format = CDROM_MSF; 2675 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry); 2676 if (ret) 2677 return ret; 2678 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format); 2679 2680 if (copy_to_user(argp, &entry, sizeof(entry))) 2681 return -EFAULT; 2682 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */ 2683 return 0; 2684 } 2685 2686 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi, 2687 void __user *argp) 2688 { 2689 struct cdrom_msf msf; 2690 2691 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2692 2693 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2694 return -ENOSYS; 2695 if (copy_from_user(&msf, argp, sizeof(msf))) 2696 return -EFAULT; 2697 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf); 2698 } 2699 2700 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi, 2701 void __user *argp) 2702 { 2703 struct cdrom_ti ti; 2704 int ret; 2705 2706 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n"); 2707 2708 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2709 return -ENOSYS; 2710 if (copy_from_user(&ti, argp, sizeof(ti))) 2711 return -EFAULT; 2712 2713 ret = check_for_audio_disc(cdi, cdi->ops); 2714 if (ret) 2715 return ret; 2716 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti); 2717 } 2718 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi, 2719 void __user *argp) 2720 { 2721 struct cdrom_volctrl volume; 2722 2723 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n"); 2724 2725 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2726 return -ENOSYS; 2727 if (copy_from_user(&volume, argp, sizeof(volume))) 2728 return -EFAULT; 2729 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume); 2730 } 2731 2732 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi, 2733 void __user *argp) 2734 { 2735 struct cdrom_volctrl volume; 2736 int ret; 2737 2738 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n"); 2739 2740 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2741 return -ENOSYS; 2742 2743 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume); 2744 if (ret) 2745 return ret; 2746 2747 if (copy_to_user(argp, &volume, sizeof(volume))) 2748 return -EFAULT; 2749 return 0; 2750 } 2751 2752 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi, 2753 unsigned int cmd) 2754 { 2755 int ret; 2756 2757 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n"); 2758 2759 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2760 return -ENOSYS; 2761 ret = check_for_audio_disc(cdi, cdi->ops); 2762 if (ret) 2763 return ret; 2764 return cdi->ops->audio_ioctl(cdi, cmd, NULL); 2765 } 2766 2767 /* 2768 * Required when we need to use READ_10 to issue other than 2048 block 2769 * reads 2770 */ 2771 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size) 2772 { 2773 const struct cdrom_device_ops *cdo = cdi->ops; 2774 struct packet_command cgc; 2775 struct modesel_head mh; 2776 2777 memset(&mh, 0, sizeof(mh)); 2778 mh.block_desc_length = 0x08; 2779 mh.block_length_med = (size >> 8) & 0xff; 2780 mh.block_length_lo = size & 0xff; 2781 2782 memset(&cgc, 0, sizeof(cgc)); 2783 cgc.cmd[0] = 0x15; 2784 cgc.cmd[1] = 1 << 4; 2785 cgc.cmd[4] = 12; 2786 cgc.buflen = sizeof(mh); 2787 cgc.buffer = (char *) &mh; 2788 cgc.data_direction = CGC_DATA_WRITE; 2789 mh.block_desc_length = 0x08; 2790 mh.block_length_med = (size >> 8) & 0xff; 2791 mh.block_length_lo = size & 0xff; 2792 2793 return cdo->generic_packet(cdi, &cgc); 2794 } 2795 2796 static int cdrom_get_track_info(struct cdrom_device_info *cdi, 2797 __u16 track, __u8 type, track_information *ti) 2798 { 2799 const struct cdrom_device_ops *cdo = cdi->ops; 2800 struct packet_command cgc; 2801 int ret, buflen; 2802 2803 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ); 2804 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO; 2805 cgc.cmd[1] = type & 3; 2806 cgc.cmd[4] = (track & 0xff00) >> 8; 2807 cgc.cmd[5] = track & 0xff; 2808 cgc.cmd[8] = 8; 2809 cgc.quiet = 1; 2810 2811 ret = cdo->generic_packet(cdi, &cgc); 2812 if (ret) 2813 return ret; 2814 2815 buflen = be16_to_cpu(ti->track_information_length) + 2816 sizeof(ti->track_information_length); 2817 2818 if (buflen > sizeof(track_information)) 2819 buflen = sizeof(track_information); 2820 2821 cgc.cmd[8] = cgc.buflen = buflen; 2822 ret = cdo->generic_packet(cdi, &cgc); 2823 if (ret) 2824 return ret; 2825 2826 /* return actual fill size */ 2827 return buflen; 2828 } 2829 2830 /* return the last written block on the CD-R media. this is for the udf 2831 file system. */ 2832 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) 2833 { 2834 struct cdrom_tocentry toc; 2835 disc_information di; 2836 track_information ti; 2837 __u32 last_track; 2838 int ret = -1, ti_size; 2839 2840 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 2841 goto use_toc; 2842 2843 ret = cdrom_get_disc_info(cdi, &di); 2844 if (ret < (int)(offsetof(typeof(di), last_track_lsb) 2845 + sizeof(di.last_track_lsb))) 2846 goto use_toc; 2847 2848 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 2849 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 2850 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2851 if (ti_size < (int)offsetof(typeof(ti), track_start)) 2852 goto use_toc; 2853 2854 /* if this track is blank, try the previous. */ 2855 if (ti.blank) { 2856 if (last_track == 1) 2857 goto use_toc; 2858 last_track--; 2859 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2860 } 2861 2862 if (ti_size < (int)(offsetof(typeof(ti), track_size) 2863 + sizeof(ti.track_size))) 2864 goto use_toc; 2865 2866 /* if last recorded field is valid, return it. */ 2867 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address) 2868 + sizeof(ti.last_rec_address))) { 2869 *last_written = be32_to_cpu(ti.last_rec_address); 2870 } else { 2871 /* make it up instead */ 2872 *last_written = be32_to_cpu(ti.track_start) + 2873 be32_to_cpu(ti.track_size); 2874 if (ti.free_blocks) 2875 *last_written -= (be32_to_cpu(ti.free_blocks) + 7); 2876 } 2877 return 0; 2878 2879 /* this is where we end up if the drive either can't do a 2880 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if 2881 it doesn't give enough information or fails. then we return 2882 the toc contents. */ 2883 use_toc: 2884 toc.cdte_format = CDROM_MSF; 2885 toc.cdte_track = CDROM_LEADOUT; 2886 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) 2887 return ret; 2888 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA); 2889 *last_written = toc.cdte_addr.lba; 2890 return 0; 2891 } 2892 2893 /* return the next writable block. also for udf file system. */ 2894 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, 2895 long *next_writable) 2896 { 2897 disc_information di; 2898 track_information ti; 2899 __u16 last_track; 2900 int ret, ti_size; 2901 2902 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 2903 goto use_last_written; 2904 2905 ret = cdrom_get_disc_info(cdi, &di); 2906 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb) 2907 + sizeof(di.last_track_lsb)) 2908 goto use_last_written; 2909 2910 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 2911 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 2912 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2913 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start)) 2914 goto use_last_written; 2915 2916 /* if this track is blank, try the previous. */ 2917 if (ti.blank) { 2918 if (last_track == 1) 2919 goto use_last_written; 2920 last_track--; 2921 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2922 if (ti_size < 0) 2923 goto use_last_written; 2924 } 2925 2926 /* if next recordable address field is valid, use it. */ 2927 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable) 2928 + sizeof(ti.next_writable)) { 2929 *next_writable = be32_to_cpu(ti.next_writable); 2930 return 0; 2931 } 2932 2933 use_last_written: 2934 ret = cdrom_get_last_written(cdi, next_writable); 2935 if (ret) { 2936 *next_writable = 0; 2937 return ret; 2938 } else { 2939 *next_writable += 7; 2940 return 0; 2941 } 2942 } 2943 2944 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi, 2945 void __user *arg, 2946 struct packet_command *cgc, 2947 int cmd) 2948 { 2949 struct scsi_sense_hdr sshdr; 2950 struct cdrom_msf msf; 2951 int blocksize = 0, format = 0, lba; 2952 int ret; 2953 2954 switch (cmd) { 2955 case CDROMREADRAW: 2956 blocksize = CD_FRAMESIZE_RAW; 2957 break; 2958 case CDROMREADMODE1: 2959 blocksize = CD_FRAMESIZE; 2960 format = 2; 2961 break; 2962 case CDROMREADMODE2: 2963 blocksize = CD_FRAMESIZE_RAW0; 2964 break; 2965 } 2966 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf))) 2967 return -EFAULT; 2968 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0); 2969 /* FIXME: we need upper bound checking, too!! */ 2970 if (lba < 0) 2971 return -EINVAL; 2972 2973 cgc->buffer = kzalloc(blocksize, GFP_KERNEL); 2974 if (cgc->buffer == NULL) 2975 return -ENOMEM; 2976 2977 memset(&sshdr, 0, sizeof(sshdr)); 2978 cgc->sshdr = &sshdr; 2979 cgc->data_direction = CGC_DATA_READ; 2980 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize); 2981 if (ret && sshdr.sense_key == 0x05 && 2982 sshdr.asc == 0x20 && 2983 sshdr.ascq == 0x00) { 2984 /* 2985 * SCSI-II devices are not required to support 2986 * READ_CD, so let's try switching block size 2987 */ 2988 /* FIXME: switch back again... */ 2989 ret = cdrom_switch_blocksize(cdi, blocksize); 2990 if (ret) 2991 goto out; 2992 cgc->sshdr = NULL; 2993 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1); 2994 ret |= cdrom_switch_blocksize(cdi, blocksize); 2995 } 2996 if (!ret && copy_to_user(arg, cgc->buffer, blocksize)) 2997 ret = -EFAULT; 2998 out: 2999 kfree(cgc->buffer); 3000 return ret; 3001 } 3002 3003 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi, 3004 void __user *arg) 3005 { 3006 struct cdrom_read_audio ra; 3007 int lba; 3008 3009 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg, 3010 sizeof(ra))) 3011 return -EFAULT; 3012 3013 if (ra.addr_format == CDROM_MSF) 3014 lba = msf_to_lba(ra.addr.msf.minute, 3015 ra.addr.msf.second, 3016 ra.addr.msf.frame); 3017 else if (ra.addr_format == CDROM_LBA) 3018 lba = ra.addr.lba; 3019 else 3020 return -EINVAL; 3021 3022 /* FIXME: we need upper bound checking, too!! */ 3023 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES) 3024 return -EINVAL; 3025 3026 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes); 3027 } 3028 3029 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi, 3030 void __user *arg) 3031 { 3032 int ret; 3033 struct cdrom_subchnl q; 3034 u_char requested, back; 3035 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q))) 3036 return -EFAULT; 3037 requested = q.cdsc_format; 3038 if (!((requested == CDROM_MSF) || 3039 (requested == CDROM_LBA))) 3040 return -EINVAL; 3041 3042 ret = cdrom_read_subchannel(cdi, &q, 0); 3043 if (ret) 3044 return ret; 3045 back = q.cdsc_format; /* local copy */ 3046 sanitize_format(&q.cdsc_absaddr, &back, requested); 3047 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 3048 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q))) 3049 return -EFAULT; 3050 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 3051 return 0; 3052 } 3053 3054 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi, 3055 void __user *arg, 3056 struct packet_command *cgc) 3057 { 3058 const struct cdrom_device_ops *cdo = cdi->ops; 3059 struct cdrom_msf msf; 3060 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 3061 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf))) 3062 return -EFAULT; 3063 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF; 3064 cgc->cmd[3] = msf.cdmsf_min0; 3065 cgc->cmd[4] = msf.cdmsf_sec0; 3066 cgc->cmd[5] = msf.cdmsf_frame0; 3067 cgc->cmd[6] = msf.cdmsf_min1; 3068 cgc->cmd[7] = msf.cdmsf_sec1; 3069 cgc->cmd[8] = msf.cdmsf_frame1; 3070 cgc->data_direction = CGC_DATA_NONE; 3071 return cdo->generic_packet(cdi, cgc); 3072 } 3073 3074 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi, 3075 void __user *arg, 3076 struct packet_command *cgc) 3077 { 3078 const struct cdrom_device_ops *cdo = cdi->ops; 3079 struct cdrom_blk blk; 3080 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n"); 3081 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk))) 3082 return -EFAULT; 3083 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10; 3084 cgc->cmd[2] = (blk.from >> 24) & 0xff; 3085 cgc->cmd[3] = (blk.from >> 16) & 0xff; 3086 cgc->cmd[4] = (blk.from >> 8) & 0xff; 3087 cgc->cmd[5] = blk.from & 0xff; 3088 cgc->cmd[7] = (blk.len >> 8) & 0xff; 3089 cgc->cmd[8] = blk.len & 0xff; 3090 cgc->data_direction = CGC_DATA_NONE; 3091 return cdo->generic_packet(cdi, cgc); 3092 } 3093 3094 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi, 3095 void __user *arg, 3096 struct packet_command *cgc, 3097 unsigned int cmd) 3098 { 3099 struct cdrom_volctrl volctrl; 3100 unsigned char buffer[32]; 3101 char mask[sizeof(buffer)]; 3102 unsigned short offset; 3103 int ret; 3104 3105 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n"); 3106 3107 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg, 3108 sizeof(volctrl))) 3109 return -EFAULT; 3110 3111 cgc->buffer = buffer; 3112 cgc->buflen = 24; 3113 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0); 3114 if (ret) 3115 return ret; 3116 3117 /* originally the code depended on buffer[1] to determine 3118 how much data is available for transfer. buffer[1] is 3119 unfortunately ambigious and the only reliable way seem 3120 to be to simply skip over the block descriptor... */ 3121 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6)); 3122 3123 if (offset + 16 > sizeof(buffer)) 3124 return -E2BIG; 3125 3126 if (offset + 16 > cgc->buflen) { 3127 cgc->buflen = offset + 16; 3128 ret = cdrom_mode_sense(cdi, cgc, 3129 GPMODE_AUDIO_CTL_PAGE, 0); 3130 if (ret) 3131 return ret; 3132 } 3133 3134 /* sanity check */ 3135 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE || 3136 buffer[offset + 1] < 14) 3137 return -EINVAL; 3138 3139 /* now we have the current volume settings. if it was only 3140 a CDROMVOLREAD, return these values */ 3141 if (cmd == CDROMVOLREAD) { 3142 volctrl.channel0 = buffer[offset+9]; 3143 volctrl.channel1 = buffer[offset+11]; 3144 volctrl.channel2 = buffer[offset+13]; 3145 volctrl.channel3 = buffer[offset+15]; 3146 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl, 3147 sizeof(volctrl))) 3148 return -EFAULT; 3149 return 0; 3150 } 3151 3152 /* get the volume mask */ 3153 cgc->buffer = mask; 3154 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1); 3155 if (ret) 3156 return ret; 3157 3158 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9]; 3159 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11]; 3160 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13]; 3161 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15]; 3162 3163 /* set volume */ 3164 cgc->buffer = buffer + offset - 8; 3165 memset(cgc->buffer, 0, 8); 3166 return cdrom_mode_select(cdi, cgc); 3167 } 3168 3169 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi, 3170 struct packet_command *cgc, 3171 int cmd) 3172 { 3173 const struct cdrom_device_ops *cdo = cdi->ops; 3174 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n"); 3175 cgc->cmd[0] = GPCMD_START_STOP_UNIT; 3176 cgc->cmd[1] = 1; 3177 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0; 3178 cgc->data_direction = CGC_DATA_NONE; 3179 return cdo->generic_packet(cdi, cgc); 3180 } 3181 3182 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi, 3183 struct packet_command *cgc, 3184 int cmd) 3185 { 3186 const struct cdrom_device_ops *cdo = cdi->ops; 3187 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n"); 3188 cgc->cmd[0] = GPCMD_PAUSE_RESUME; 3189 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0; 3190 cgc->data_direction = CGC_DATA_NONE; 3191 return cdo->generic_packet(cdi, cgc); 3192 } 3193 3194 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi, 3195 void __user *arg, 3196 struct packet_command *cgc) 3197 { 3198 int ret; 3199 dvd_struct *s; 3200 int size = sizeof(dvd_struct); 3201 3202 if (!CDROM_CAN(CDC_DVD)) 3203 return -ENOSYS; 3204 3205 s = memdup_user(arg, size); 3206 if (IS_ERR(s)) 3207 return PTR_ERR(s); 3208 3209 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 3210 3211 ret = dvd_read_struct(cdi, s, cgc); 3212 if (ret) 3213 goto out; 3214 3215 if (copy_to_user(arg, s, size)) 3216 ret = -EFAULT; 3217 out: 3218 kfree(s); 3219 return ret; 3220 } 3221 3222 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi, 3223 void __user *arg) 3224 { 3225 int ret; 3226 dvd_authinfo ai; 3227 if (!CDROM_CAN(CDC_DVD)) 3228 return -ENOSYS; 3229 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n"); 3230 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai))) 3231 return -EFAULT; 3232 ret = dvd_do_auth(cdi, &ai); 3233 if (ret) 3234 return ret; 3235 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai))) 3236 return -EFAULT; 3237 return 0; 3238 } 3239 3240 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi, 3241 void __user *arg) 3242 { 3243 int ret; 3244 long next = 0; 3245 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 3246 ret = cdrom_get_next_writable(cdi, &next); 3247 if (ret) 3248 return ret; 3249 if (copy_to_user((long __user *)arg, &next, sizeof(next))) 3250 return -EFAULT; 3251 return 0; 3252 } 3253 3254 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi, 3255 void __user *arg) 3256 { 3257 int ret; 3258 long last = 0; 3259 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 3260 ret = cdrom_get_last_written(cdi, &last); 3261 if (ret) 3262 return ret; 3263 if (copy_to_user((long __user *)arg, &last, sizeof(last))) 3264 return -EFAULT; 3265 return 0; 3266 } 3267 3268 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 3269 unsigned long arg) 3270 { 3271 struct packet_command cgc; 3272 void __user *userptr = (void __user *)arg; 3273 3274 memset(&cgc, 0, sizeof(cgc)); 3275 3276 /* build a unified command and queue it through 3277 cdo->generic_packet() */ 3278 switch (cmd) { 3279 case CDROMREADRAW: 3280 case CDROMREADMODE1: 3281 case CDROMREADMODE2: 3282 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd); 3283 case CDROMREADAUDIO: 3284 return mmc_ioctl_cdrom_read_audio(cdi, userptr); 3285 case CDROMSUBCHNL: 3286 return mmc_ioctl_cdrom_subchannel(cdi, userptr); 3287 case CDROMPLAYMSF: 3288 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc); 3289 case CDROMPLAYBLK: 3290 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc); 3291 case CDROMVOLCTRL: 3292 case CDROMVOLREAD: 3293 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd); 3294 case CDROMSTART: 3295 case CDROMSTOP: 3296 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd); 3297 case CDROMPAUSE: 3298 case CDROMRESUME: 3299 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd); 3300 case DVD_READ_STRUCT: 3301 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc); 3302 case DVD_AUTH: 3303 return mmc_ioctl_dvd_auth(cdi, userptr); 3304 case CDROM_NEXT_WRITABLE: 3305 return mmc_ioctl_cdrom_next_writable(cdi, userptr); 3306 case CDROM_LAST_WRITTEN: 3307 return mmc_ioctl_cdrom_last_written(cdi, userptr); 3308 } 3309 3310 return -ENOTTY; 3311 } 3312 3313 /* 3314 * Just about every imaginable ioctl is supported in the Uniform layer 3315 * these days. 3316 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl(). 3317 */ 3318 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, 3319 fmode_t mode, unsigned int cmd, unsigned long arg) 3320 { 3321 void __user *argp = (void __user *)arg; 3322 int ret; 3323 3324 /* 3325 * Try the generic SCSI command ioctl's first. 3326 */ 3327 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp); 3328 if (ret != -ENOTTY) 3329 return ret; 3330 3331 switch (cmd) { 3332 case CDROMMULTISESSION: 3333 return cdrom_ioctl_multisession(cdi, argp); 3334 case CDROMEJECT: 3335 return cdrom_ioctl_eject(cdi); 3336 case CDROMCLOSETRAY: 3337 return cdrom_ioctl_closetray(cdi); 3338 case CDROMEJECT_SW: 3339 return cdrom_ioctl_eject_sw(cdi, arg); 3340 case CDROM_MEDIA_CHANGED: 3341 return cdrom_ioctl_media_changed(cdi, arg); 3342 case CDROM_SET_OPTIONS: 3343 return cdrom_ioctl_set_options(cdi, arg); 3344 case CDROM_CLEAR_OPTIONS: 3345 return cdrom_ioctl_clear_options(cdi, arg); 3346 case CDROM_SELECT_SPEED: 3347 return cdrom_ioctl_select_speed(cdi, arg); 3348 case CDROM_SELECT_DISC: 3349 return cdrom_ioctl_select_disc(cdi, arg); 3350 case CDROMRESET: 3351 return cdrom_ioctl_reset(cdi, bdev); 3352 case CDROM_LOCKDOOR: 3353 return cdrom_ioctl_lock_door(cdi, arg); 3354 case CDROM_DEBUG: 3355 return cdrom_ioctl_debug(cdi, arg); 3356 case CDROM_GET_CAPABILITY: 3357 return cdrom_ioctl_get_capability(cdi); 3358 case CDROM_GET_MCN: 3359 return cdrom_ioctl_get_mcn(cdi, argp); 3360 case CDROM_DRIVE_STATUS: 3361 return cdrom_ioctl_drive_status(cdi, arg); 3362 case CDROM_DISC_STATUS: 3363 return cdrom_ioctl_disc_status(cdi); 3364 case CDROM_CHANGER_NSLOTS: 3365 return cdrom_ioctl_changer_nslots(cdi); 3366 } 3367 3368 /* 3369 * Use the ioctls that are implemented through the generic_packet() 3370 * interface. this may look at bit funny, but if -ENOTTY is 3371 * returned that particular ioctl is not implemented and we 3372 * let it go through the device specific ones. 3373 */ 3374 if (CDROM_CAN(CDC_GENERIC_PACKET)) { 3375 ret = mmc_ioctl(cdi, cmd, arg); 3376 if (ret != -ENOTTY) 3377 return ret; 3378 } 3379 3380 /* 3381 * Note: most of the cd_dbg() calls are commented out here, 3382 * because they fill up the sys log when CD players poll 3383 * the drive. 3384 */ 3385 switch (cmd) { 3386 case CDROMSUBCHNL: 3387 return cdrom_ioctl_get_subchnl(cdi, argp); 3388 case CDROMREADTOCHDR: 3389 return cdrom_ioctl_read_tochdr(cdi, argp); 3390 case CDROMREADTOCENTRY: 3391 return cdrom_ioctl_read_tocentry(cdi, argp); 3392 case CDROMPLAYMSF: 3393 return cdrom_ioctl_play_msf(cdi, argp); 3394 case CDROMPLAYTRKIND: 3395 return cdrom_ioctl_play_trkind(cdi, argp); 3396 case CDROMVOLCTRL: 3397 return cdrom_ioctl_volctrl(cdi, argp); 3398 case CDROMVOLREAD: 3399 return cdrom_ioctl_volread(cdi, argp); 3400 case CDROMSTART: 3401 case CDROMSTOP: 3402 case CDROMPAUSE: 3403 case CDROMRESUME: 3404 return cdrom_ioctl_audioctl(cdi, cmd); 3405 } 3406 3407 return -ENOSYS; 3408 } 3409 3410 EXPORT_SYMBOL(cdrom_get_last_written); 3411 EXPORT_SYMBOL(register_cdrom); 3412 EXPORT_SYMBOL(unregister_cdrom); 3413 EXPORT_SYMBOL(cdrom_open); 3414 EXPORT_SYMBOL(cdrom_release); 3415 EXPORT_SYMBOL(cdrom_ioctl); 3416 EXPORT_SYMBOL(cdrom_media_changed); 3417 EXPORT_SYMBOL(cdrom_number_of_slots); 3418 EXPORT_SYMBOL(cdrom_mode_select); 3419 EXPORT_SYMBOL(cdrom_mode_sense); 3420 EXPORT_SYMBOL(init_cdrom_command); 3421 EXPORT_SYMBOL(cdrom_get_media_event); 3422 3423 #ifdef CONFIG_SYSCTL 3424 3425 #define CDROM_STR_SIZE 1000 3426 3427 static struct cdrom_sysctl_settings { 3428 char info[CDROM_STR_SIZE]; /* general info */ 3429 int autoclose; /* close tray upon mount, etc */ 3430 int autoeject; /* eject on umount */ 3431 int debug; /* turn on debugging messages */ 3432 int lock; /* lock the door on device open */ 3433 int check; /* check media type */ 3434 } cdrom_sysctl_settings; 3435 3436 enum cdrom_print_option { 3437 CTL_NAME, 3438 CTL_SPEED, 3439 CTL_SLOTS, 3440 CTL_CAPABILITY 3441 }; 3442 3443 static int cdrom_print_info(const char *header, int val, char *info, 3444 int *pos, enum cdrom_print_option option) 3445 { 3446 const int max_size = sizeof(cdrom_sysctl_settings.info); 3447 struct cdrom_device_info *cdi; 3448 int ret; 3449 3450 ret = scnprintf(info + *pos, max_size - *pos, header); 3451 if (!ret) 3452 return 1; 3453 3454 *pos += ret; 3455 3456 list_for_each_entry(cdi, &cdrom_list, list) { 3457 switch (option) { 3458 case CTL_NAME: 3459 ret = scnprintf(info + *pos, max_size - *pos, 3460 "\t%s", cdi->name); 3461 break; 3462 case CTL_SPEED: 3463 ret = scnprintf(info + *pos, max_size - *pos, 3464 "\t%d", cdi->speed); 3465 break; 3466 case CTL_SLOTS: 3467 ret = scnprintf(info + *pos, max_size - *pos, 3468 "\t%d", cdi->capacity); 3469 break; 3470 case CTL_CAPABILITY: 3471 ret = scnprintf(info + *pos, max_size - *pos, 3472 "\t%d", CDROM_CAN(val) != 0); 3473 break; 3474 default: 3475 pr_info("invalid option%d\n", option); 3476 return 1; 3477 } 3478 if (!ret) 3479 return 1; 3480 *pos += ret; 3481 } 3482 3483 return 0; 3484 } 3485 3486 static int cdrom_sysctl_info(struct ctl_table *ctl, int write, 3487 void __user *buffer, size_t *lenp, loff_t *ppos) 3488 { 3489 int pos; 3490 char *info = cdrom_sysctl_settings.info; 3491 const int max_size = sizeof(cdrom_sysctl_settings.info); 3492 3493 if (!*lenp || (*ppos && !write)) { 3494 *lenp = 0; 3495 return 0; 3496 } 3497 3498 mutex_lock(&cdrom_mutex); 3499 3500 pos = sprintf(info, "CD-ROM information, " VERSION "\n"); 3501 3502 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME)) 3503 goto done; 3504 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED)) 3505 goto done; 3506 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS)) 3507 goto done; 3508 if (cdrom_print_info("\nCan close tray:\t", 3509 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY)) 3510 goto done; 3511 if (cdrom_print_info("\nCan open tray:\t", 3512 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY)) 3513 goto done; 3514 if (cdrom_print_info("\nCan lock tray:\t", 3515 CDC_LOCK, info, &pos, CTL_CAPABILITY)) 3516 goto done; 3517 if (cdrom_print_info("\nCan change speed:", 3518 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY)) 3519 goto done; 3520 if (cdrom_print_info("\nCan select disk:", 3521 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY)) 3522 goto done; 3523 if (cdrom_print_info("\nCan read multisession:", 3524 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY)) 3525 goto done; 3526 if (cdrom_print_info("\nCan read MCN:\t", 3527 CDC_MCN, info, &pos, CTL_CAPABILITY)) 3528 goto done; 3529 if (cdrom_print_info("\nReports media changed:", 3530 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY)) 3531 goto done; 3532 if (cdrom_print_info("\nCan play audio:\t", 3533 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY)) 3534 goto done; 3535 if (cdrom_print_info("\nCan write CD-R:\t", 3536 CDC_CD_R, info, &pos, CTL_CAPABILITY)) 3537 goto done; 3538 if (cdrom_print_info("\nCan write CD-RW:", 3539 CDC_CD_RW, info, &pos, CTL_CAPABILITY)) 3540 goto done; 3541 if (cdrom_print_info("\nCan read DVD:\t", 3542 CDC_DVD, info, &pos, CTL_CAPABILITY)) 3543 goto done; 3544 if (cdrom_print_info("\nCan write DVD-R:", 3545 CDC_DVD_R, info, &pos, CTL_CAPABILITY)) 3546 goto done; 3547 if (cdrom_print_info("\nCan write DVD-RAM:", 3548 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY)) 3549 goto done; 3550 if (cdrom_print_info("\nCan read MRW:\t", 3551 CDC_MRW, info, &pos, CTL_CAPABILITY)) 3552 goto done; 3553 if (cdrom_print_info("\nCan write MRW:\t", 3554 CDC_MRW_W, info, &pos, CTL_CAPABILITY)) 3555 goto done; 3556 if (cdrom_print_info("\nCan write RAM:\t", 3557 CDC_RAM, info, &pos, CTL_CAPABILITY)) 3558 goto done; 3559 if (!scnprintf(info + pos, max_size - pos, "\n\n")) 3560 goto done; 3561 doit: 3562 mutex_unlock(&cdrom_mutex); 3563 return proc_dostring(ctl, write, buffer, lenp, ppos); 3564 done: 3565 pr_info("info buffer too small\n"); 3566 goto doit; 3567 } 3568 3569 /* Unfortunately, per device settings are not implemented through 3570 procfs/sysctl yet. When they are, this will naturally disappear. For now 3571 just update all drives. Later this will become the template on which 3572 new registered drives will be based. */ 3573 static void cdrom_update_settings(void) 3574 { 3575 struct cdrom_device_info *cdi; 3576 3577 mutex_lock(&cdrom_mutex); 3578 list_for_each_entry(cdi, &cdrom_list, list) { 3579 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) 3580 cdi->options |= CDO_AUTO_CLOSE; 3581 else if (!autoclose) 3582 cdi->options &= ~CDO_AUTO_CLOSE; 3583 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY)) 3584 cdi->options |= CDO_AUTO_EJECT; 3585 else if (!autoeject) 3586 cdi->options &= ~CDO_AUTO_EJECT; 3587 if (lockdoor && CDROM_CAN(CDC_LOCK)) 3588 cdi->options |= CDO_LOCK; 3589 else if (!lockdoor) 3590 cdi->options &= ~CDO_LOCK; 3591 if (check_media_type) 3592 cdi->options |= CDO_CHECK_TYPE; 3593 else 3594 cdi->options &= ~CDO_CHECK_TYPE; 3595 } 3596 mutex_unlock(&cdrom_mutex); 3597 } 3598 3599 static int cdrom_sysctl_handler(struct ctl_table *ctl, int write, 3600 void __user *buffer, size_t *lenp, loff_t *ppos) 3601 { 3602 int ret; 3603 3604 ret = proc_dointvec(ctl, write, buffer, lenp, ppos); 3605 3606 if (write) { 3607 3608 /* we only care for 1 or 0. */ 3609 autoclose = !!cdrom_sysctl_settings.autoclose; 3610 autoeject = !!cdrom_sysctl_settings.autoeject; 3611 debug = !!cdrom_sysctl_settings.debug; 3612 lockdoor = !!cdrom_sysctl_settings.lock; 3613 check_media_type = !!cdrom_sysctl_settings.check; 3614 3615 /* update the option flags according to the changes. we 3616 don't have per device options through sysctl yet, 3617 but we will have and then this will disappear. */ 3618 cdrom_update_settings(); 3619 } 3620 3621 return ret; 3622 } 3623 3624 /* Place files in /proc/sys/dev/cdrom */ 3625 static struct ctl_table cdrom_table[] = { 3626 { 3627 .procname = "info", 3628 .data = &cdrom_sysctl_settings.info, 3629 .maxlen = CDROM_STR_SIZE, 3630 .mode = 0444, 3631 .proc_handler = cdrom_sysctl_info, 3632 }, 3633 { 3634 .procname = "autoclose", 3635 .data = &cdrom_sysctl_settings.autoclose, 3636 .maxlen = sizeof(int), 3637 .mode = 0644, 3638 .proc_handler = cdrom_sysctl_handler, 3639 }, 3640 { 3641 .procname = "autoeject", 3642 .data = &cdrom_sysctl_settings.autoeject, 3643 .maxlen = sizeof(int), 3644 .mode = 0644, 3645 .proc_handler = cdrom_sysctl_handler, 3646 }, 3647 { 3648 .procname = "debug", 3649 .data = &cdrom_sysctl_settings.debug, 3650 .maxlen = sizeof(int), 3651 .mode = 0644, 3652 .proc_handler = cdrom_sysctl_handler, 3653 }, 3654 { 3655 .procname = "lock", 3656 .data = &cdrom_sysctl_settings.lock, 3657 .maxlen = sizeof(int), 3658 .mode = 0644, 3659 .proc_handler = cdrom_sysctl_handler, 3660 }, 3661 { 3662 .procname = "check_media", 3663 .data = &cdrom_sysctl_settings.check, 3664 .maxlen = sizeof(int), 3665 .mode = 0644, 3666 .proc_handler = cdrom_sysctl_handler 3667 }, 3668 { } 3669 }; 3670 3671 static struct ctl_table cdrom_cdrom_table[] = { 3672 { 3673 .procname = "cdrom", 3674 .maxlen = 0, 3675 .mode = 0555, 3676 .child = cdrom_table, 3677 }, 3678 { } 3679 }; 3680 3681 /* Make sure that /proc/sys/dev is there */ 3682 static struct ctl_table cdrom_root_table[] = { 3683 { 3684 .procname = "dev", 3685 .maxlen = 0, 3686 .mode = 0555, 3687 .child = cdrom_cdrom_table, 3688 }, 3689 { } 3690 }; 3691 static struct ctl_table_header *cdrom_sysctl_header; 3692 3693 static void cdrom_sysctl_register(void) 3694 { 3695 static int initialized; 3696 3697 if (initialized == 1) 3698 return; 3699 3700 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table); 3701 3702 /* set the defaults */ 3703 cdrom_sysctl_settings.autoclose = autoclose; 3704 cdrom_sysctl_settings.autoeject = autoeject; 3705 cdrom_sysctl_settings.debug = debug; 3706 cdrom_sysctl_settings.lock = lockdoor; 3707 cdrom_sysctl_settings.check = check_media_type; 3708 3709 initialized = 1; 3710 } 3711 3712 static void cdrom_sysctl_unregister(void) 3713 { 3714 if (cdrom_sysctl_header) 3715 unregister_sysctl_table(cdrom_sysctl_header); 3716 } 3717 3718 #else /* CONFIG_SYSCTL */ 3719 3720 static void cdrom_sysctl_register(void) 3721 { 3722 } 3723 3724 static void cdrom_sysctl_unregister(void) 3725 { 3726 } 3727 3728 #endif /* CONFIG_SYSCTL */ 3729 3730 static int __init cdrom_init(void) 3731 { 3732 cdrom_sysctl_register(); 3733 3734 return 0; 3735 } 3736 3737 static void __exit cdrom_exit(void) 3738 { 3739 pr_info("Uniform CD-ROM driver unloaded\n"); 3740 cdrom_sysctl_unregister(); 3741 } 3742 3743 module_init(cdrom_init); 3744 module_exit(cdrom_exit); 3745 MODULE_LICENSE("GPL"); 3746