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