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 #include <scsi/scsi_request.h> 288 289 /* used to tell the module to turn on full debugging messages */ 290 static bool debug; 291 /* default compatibility mode */ 292 static bool autoclose=1; 293 static bool autoeject; 294 static bool lockdoor = 1; 295 /* will we ever get to use this... sigh. */ 296 static bool check_media_type; 297 /* automatically restart mrw format */ 298 static bool mrw_format_restart = 1; 299 module_param(debug, bool, 0); 300 module_param(autoclose, bool, 0); 301 module_param(autoeject, bool, 0); 302 module_param(lockdoor, bool, 0); 303 module_param(check_media_type, bool, 0); 304 module_param(mrw_format_restart, bool, 0); 305 306 static DEFINE_MUTEX(cdrom_mutex); 307 308 static const char *mrw_format_status[] = { 309 "not mrw", 310 "bgformat inactive", 311 "bgformat active", 312 "mrw complete", 313 }; 314 315 static const char *mrw_address_space[] = { "DMA", "GAA" }; 316 317 #if (ERRLOGMASK != CD_NOTHING) 318 #define cd_dbg(type, fmt, ...) \ 319 do { \ 320 if ((ERRLOGMASK & type) || debug == 1) \ 321 pr_debug(fmt, ##__VA_ARGS__); \ 322 } while (0) 323 #else 324 #define cd_dbg(type, fmt, ...) \ 325 do { \ 326 if (0 && (ERRLOGMASK & type) || debug == 1) \ 327 pr_debug(fmt, ##__VA_ARGS__); \ 328 } while (0) 329 #endif 330 331 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in 332 a lot of places. This macro makes the code more clear. */ 333 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type)) 334 335 /* 336 * Another popular OS uses 7 seconds as the hard timeout for default 337 * commands, so it is a good choice for us as well. 338 */ 339 #define CDROM_DEF_TIMEOUT (7 * HZ) 340 341 /* Not-exported routines. */ 342 343 static void cdrom_sysctl_register(void); 344 345 static LIST_HEAD(cdrom_list); 346 347 int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 348 struct packet_command *cgc) 349 { 350 if (cgc->sshdr) { 351 cgc->sshdr->sense_key = 0x05; 352 cgc->sshdr->asc = 0x20; 353 cgc->sshdr->ascq = 0x00; 354 } 355 356 cgc->stat = -EIO; 357 return -EIO; 358 } 359 EXPORT_SYMBOL(cdrom_dummy_generic_packet); 360 361 static int cdrom_flush_cache(struct cdrom_device_info *cdi) 362 { 363 struct packet_command cgc; 364 365 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 366 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 367 368 cgc.timeout = 5 * 60 * HZ; 369 370 return cdi->ops->generic_packet(cdi, &cgc); 371 } 372 373 /* requires CD R/RW */ 374 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, 375 disc_information *di) 376 { 377 const struct cdrom_device_ops *cdo = cdi->ops; 378 struct packet_command cgc; 379 int ret, buflen; 380 381 /* set up command and get the disc info */ 382 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); 383 cgc.cmd[0] = GPCMD_READ_DISC_INFO; 384 cgc.cmd[8] = cgc.buflen = 2; 385 cgc.quiet = 1; 386 387 ret = cdo->generic_packet(cdi, &cgc); 388 if (ret) 389 return ret; 390 391 /* not all drives have the same disc_info length, so requeue 392 * packet with the length the drive tells us it can supply 393 */ 394 buflen = be16_to_cpu(di->disc_information_length) + 395 sizeof(di->disc_information_length); 396 397 if (buflen > sizeof(disc_information)) 398 buflen = sizeof(disc_information); 399 400 cgc.cmd[8] = cgc.buflen = buflen; 401 ret = cdo->generic_packet(cdi, &cgc); 402 if (ret) 403 return ret; 404 405 /* return actual fill size */ 406 return buflen; 407 } 408 409 /* This macro makes sure we don't have to check on cdrom_device_ops 410 * existence in the run-time routines below. Change_capability is a 411 * hack to have the capability flags defined const, while we can still 412 * change it here without gcc complaining at every line. 413 */ 414 #define ENSURE(cdo, call, bits) \ 415 do { \ 416 if (cdo->call == NULL) \ 417 WARN_ON_ONCE((cdo)->capability & (bits)); \ 418 } while (0) 419 420 /* 421 * the first prototypes used 0x2c as the page code for the mrw mode page, 422 * subsequently this was changed to 0x03. probe the one used by this drive 423 */ 424 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi) 425 { 426 struct packet_command cgc; 427 char buffer[16]; 428 429 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 430 431 cgc.timeout = HZ; 432 cgc.quiet = 1; 433 434 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) { 435 cdi->mrw_mode_page = MRW_MODE_PC; 436 return 0; 437 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) { 438 cdi->mrw_mode_page = MRW_MODE_PC_PRE1; 439 return 0; 440 } 441 442 return 1; 443 } 444 445 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write) 446 { 447 struct packet_command cgc; 448 struct mrw_feature_desc *mfd; 449 unsigned char buffer[16]; 450 int ret; 451 452 *write = 0; 453 454 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 455 456 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 457 cgc.cmd[3] = CDF_MRW; 458 cgc.cmd[8] = sizeof(buffer); 459 cgc.quiet = 1; 460 461 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 462 return ret; 463 464 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)]; 465 if (be16_to_cpu(mfd->feature_code) != CDF_MRW) 466 return 1; 467 *write = mfd->write; 468 469 if ((ret = cdrom_mrw_probe_pc(cdi))) { 470 *write = 0; 471 return ret; 472 } 473 474 return 0; 475 } 476 477 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont) 478 { 479 struct packet_command cgc; 480 unsigned char buffer[12]; 481 int ret; 482 483 pr_info("%sstarting format\n", cont ? "Re" : ""); 484 485 /* 486 * FmtData bit set (bit 4), format type is 1 487 */ 488 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE); 489 cgc.cmd[0] = GPCMD_FORMAT_UNIT; 490 cgc.cmd[1] = (1 << 4) | 1; 491 492 cgc.timeout = 5 * 60 * HZ; 493 494 /* 495 * 4 byte format list header, 8 byte format list descriptor 496 */ 497 buffer[1] = 1 << 1; 498 buffer[3] = 8; 499 500 /* 501 * nr_blocks field 502 */ 503 buffer[4] = 0xff; 504 buffer[5] = 0xff; 505 buffer[6] = 0xff; 506 buffer[7] = 0xff; 507 508 buffer[8] = 0x24 << 2; 509 buffer[11] = cont; 510 511 ret = cdi->ops->generic_packet(cdi, &cgc); 512 if (ret) 513 pr_info("bgformat failed\n"); 514 515 return ret; 516 } 517 518 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed) 519 { 520 struct packet_command cgc; 521 522 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 523 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 524 525 /* 526 * Session = 1, Track = 0 527 */ 528 cgc.cmd[1] = !!immed; 529 cgc.cmd[2] = 1 << 1; 530 531 cgc.timeout = 5 * 60 * HZ; 532 533 return cdi->ops->generic_packet(cdi, &cgc); 534 } 535 536 static int cdrom_mrw_exit(struct cdrom_device_info *cdi) 537 { 538 disc_information di; 539 int ret; 540 541 ret = cdrom_get_disc_info(cdi, &di); 542 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type)) 543 return 1; 544 545 ret = 0; 546 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) { 547 pr_info("issuing MRW background format suspend\n"); 548 ret = cdrom_mrw_bgformat_susp(cdi, 0); 549 } 550 551 if (!ret && cdi->media_written) 552 ret = cdrom_flush_cache(cdi); 553 554 return ret; 555 } 556 557 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space) 558 { 559 struct packet_command cgc; 560 struct mode_page_header *mph; 561 char buffer[16]; 562 int ret, offset, size; 563 564 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 565 566 cgc.buffer = buffer; 567 cgc.buflen = sizeof(buffer); 568 569 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0); 570 if (ret) 571 return ret; 572 573 mph = (struct mode_page_header *)buffer; 574 offset = be16_to_cpu(mph->desc_length); 575 size = be16_to_cpu(mph->mode_data_length) + 2; 576 577 buffer[offset + 3] = space; 578 cgc.buflen = size; 579 580 ret = cdrom_mode_select(cdi, &cgc); 581 if (ret) 582 return ret; 583 584 pr_info("%s: mrw address space %s selected\n", 585 cdi->name, mrw_address_space[space]); 586 return 0; 587 } 588 589 int register_cdrom(struct cdrom_device_info *cdi) 590 { 591 static char banner_printed; 592 const struct cdrom_device_ops *cdo = cdi->ops; 593 594 cd_dbg(CD_OPEN, "entering register_cdrom\n"); 595 596 if (cdo->open == NULL || cdo->release == NULL) 597 return -EINVAL; 598 if (!banner_printed) { 599 pr_info("Uniform CD-ROM driver " REVISION "\n"); 600 banner_printed = 1; 601 cdrom_sysctl_register(); 602 } 603 604 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS); 605 if (cdo->check_events == NULL && cdo->media_changed == NULL) 606 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC)); 607 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY); 608 ENSURE(cdo, lock_door, CDC_LOCK); 609 ENSURE(cdo, select_speed, CDC_SELECT_SPEED); 610 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION); 611 ENSURE(cdo, get_mcn, CDC_MCN); 612 ENSURE(cdo, reset, CDC_RESET); 613 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET); 614 cdi->mc_flags = 0; 615 cdi->options = CDO_USE_FFLAGS; 616 617 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY)) 618 cdi->options |= (int) CDO_AUTO_CLOSE; 619 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY)) 620 cdi->options |= (int) CDO_AUTO_EJECT; 621 if (lockdoor == 1) 622 cdi->options |= (int) CDO_LOCK; 623 if (check_media_type == 1) 624 cdi->options |= (int) CDO_CHECK_TYPE; 625 626 if (CDROM_CAN(CDC_MRW_W)) 627 cdi->exit = cdrom_mrw_exit; 628 629 if (cdi->disk) 630 cdi->cdda_method = CDDA_BPC_FULL; 631 else 632 cdi->cdda_method = CDDA_OLD; 633 634 WARN_ON(!cdo->generic_packet); 635 636 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name); 637 mutex_lock(&cdrom_mutex); 638 list_add(&cdi->list, &cdrom_list); 639 mutex_unlock(&cdrom_mutex); 640 return 0; 641 } 642 #undef ENSURE 643 644 void unregister_cdrom(struct cdrom_device_info *cdi) 645 { 646 cd_dbg(CD_OPEN, "entering unregister_cdrom\n"); 647 648 mutex_lock(&cdrom_mutex); 649 list_del(&cdi->list); 650 mutex_unlock(&cdrom_mutex); 651 652 if (cdi->exit) 653 cdi->exit(cdi); 654 655 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name); 656 } 657 658 int cdrom_get_media_event(struct cdrom_device_info *cdi, 659 struct media_event_desc *med) 660 { 661 struct packet_command cgc; 662 unsigned char buffer[8]; 663 struct event_header *eh = (struct event_header *)buffer; 664 665 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 666 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION; 667 cgc.cmd[1] = 1; /* IMMED */ 668 cgc.cmd[4] = 1 << 4; /* media event */ 669 cgc.cmd[8] = sizeof(buffer); 670 cgc.quiet = 1; 671 672 if (cdi->ops->generic_packet(cdi, &cgc)) 673 return 1; 674 675 if (be16_to_cpu(eh->data_len) < sizeof(*med)) 676 return 1; 677 678 if (eh->nea || eh->notification_class != 0x4) 679 return 1; 680 681 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med)); 682 return 0; 683 } 684 685 static int cdrom_get_random_writable(struct cdrom_device_info *cdi, 686 struct rwrt_feature_desc *rfd) 687 { 688 struct packet_command cgc; 689 char buffer[24]; 690 int ret; 691 692 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 693 694 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */ 695 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */ 696 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */ 697 cgc.quiet = 1; 698 699 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 700 return ret; 701 702 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd)); 703 return 0; 704 } 705 706 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi) 707 { 708 struct packet_command cgc; 709 char buffer[16]; 710 __be16 *feature_code; 711 int ret; 712 713 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 714 715 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 716 cgc.cmd[3] = CDF_HWDM; 717 cgc.cmd[8] = sizeof(buffer); 718 cgc.quiet = 1; 719 720 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 721 return ret; 722 723 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)]; 724 if (be16_to_cpu(*feature_code) == CDF_HWDM) 725 return 0; 726 727 return 1; 728 } 729 730 731 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write) 732 { 733 struct rwrt_feature_desc rfd; 734 int ret; 735 736 *write = 0; 737 738 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 739 return ret; 740 741 if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 742 *write = 1; 743 744 return 0; 745 } 746 747 static int cdrom_media_erasable(struct cdrom_device_info *cdi) 748 { 749 disc_information di; 750 int ret; 751 752 ret = cdrom_get_disc_info(cdi, &di); 753 if (ret < 0 || ret < offsetof(typeof(di), n_first_track)) 754 return -1; 755 756 return di.erasable; 757 } 758 759 /* 760 * FIXME: check RO bit 761 */ 762 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi) 763 { 764 int ret = cdrom_media_erasable(cdi); 765 766 /* 767 * allow writable open if media info read worked and media is 768 * erasable, _or_ if it fails since not all drives support it 769 */ 770 if (!ret) 771 return 1; 772 773 return 0; 774 } 775 776 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi) 777 { 778 disc_information di; 779 int ret; 780 781 /* 782 * always reset to DMA lba space on open 783 */ 784 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) { 785 pr_err("failed setting lba address space\n"); 786 return 1; 787 } 788 789 ret = cdrom_get_disc_info(cdi, &di); 790 if (ret < 0 || ret < offsetof(typeof(di),disc_type)) 791 return 1; 792 793 if (!di.erasable) 794 return 1; 795 796 /* 797 * mrw_status 798 * 0 - not MRW formatted 799 * 1 - MRW bgformat started, but not running or complete 800 * 2 - MRW bgformat in progress 801 * 3 - MRW formatting complete 802 */ 803 ret = 0; 804 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]); 805 if (!di.mrw_status) 806 ret = 1; 807 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE && 808 mrw_format_restart) 809 ret = cdrom_mrw_bgformat(cdi, 1); 810 811 return ret; 812 } 813 814 static int mo_open_write(struct cdrom_device_info *cdi) 815 { 816 struct packet_command cgc; 817 char buffer[255]; 818 int ret; 819 820 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ); 821 cgc.quiet = 1; 822 823 /* 824 * obtain write protect information as per 825 * drivers/scsi/sd.c:sd_read_write_protect_flag 826 */ 827 828 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 829 if (ret) 830 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0); 831 if (ret) { 832 cgc.buflen = 255; 833 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 834 } 835 836 /* drive gave us no info, let the user go ahead */ 837 if (ret) 838 return 0; 839 840 return buffer[3] & 0x80; 841 } 842 843 static int cdrom_ram_open_write(struct cdrom_device_info *cdi) 844 { 845 struct rwrt_feature_desc rfd; 846 int ret; 847 848 if ((ret = cdrom_has_defect_mgt(cdi))) 849 return ret; 850 851 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 852 return ret; 853 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 854 ret = !rfd.curr; 855 856 cd_dbg(CD_OPEN, "can open for random write\n"); 857 return ret; 858 } 859 860 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi) 861 { 862 struct packet_command cgc; 863 char buffer[32]; 864 int ret, mmc3_profile; 865 866 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 867 868 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 869 cgc.cmd[1] = 0; 870 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */ 871 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */ 872 cgc.quiet = 1; 873 874 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 875 mmc3_profile = 0xffff; 876 else 877 mmc3_profile = (buffer[6] << 8) | buffer[7]; 878 879 cdi->mmc3_profile = mmc3_profile; 880 } 881 882 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi) 883 { 884 switch (cdi->mmc3_profile) { 885 case 0x12: /* DVD-RAM */ 886 case 0x1A: /* DVD+RW */ 887 case 0x43: /* BD-RE */ 888 return 0; 889 default: 890 return 1; 891 } 892 } 893 894 /* 895 * returns 0 for ok to open write, non-0 to disallow 896 */ 897 static int cdrom_open_write(struct cdrom_device_info *cdi) 898 { 899 int mrw, mrw_write, ram_write; 900 int ret = 1; 901 902 mrw = 0; 903 if (!cdrom_is_mrw(cdi, &mrw_write)) 904 mrw = 1; 905 906 if (CDROM_CAN(CDC_MO_DRIVE)) 907 ram_write = 1; 908 else 909 (void) cdrom_is_random_writable(cdi, &ram_write); 910 911 if (mrw) 912 cdi->mask &= ~CDC_MRW; 913 else 914 cdi->mask |= CDC_MRW; 915 916 if (mrw_write) 917 cdi->mask &= ~CDC_MRW_W; 918 else 919 cdi->mask |= CDC_MRW_W; 920 921 if (ram_write) 922 cdi->mask &= ~CDC_RAM; 923 else 924 cdi->mask |= CDC_RAM; 925 926 if (CDROM_CAN(CDC_MRW_W)) 927 ret = cdrom_mrw_open_write(cdi); 928 else if (CDROM_CAN(CDC_DVD_RAM)) 929 ret = cdrom_dvdram_open_write(cdi); 930 else if (CDROM_CAN(CDC_RAM) && 931 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE)) 932 ret = cdrom_ram_open_write(cdi); 933 else if (CDROM_CAN(CDC_MO_DRIVE)) 934 ret = mo_open_write(cdi); 935 else if (!cdrom_is_dvd_rw(cdi)) 936 ret = 0; 937 938 return ret; 939 } 940 941 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi) 942 { 943 struct packet_command cgc; 944 945 if (cdi->mmc3_profile != 0x1a) { 946 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name); 947 return; 948 } 949 950 if (!cdi->media_written) { 951 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name); 952 return; 953 } 954 955 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name); 956 957 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 958 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 959 cgc.timeout = 30*HZ; 960 cdi->ops->generic_packet(cdi, &cgc); 961 962 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 963 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 964 cgc.timeout = 3000*HZ; 965 cgc.quiet = 1; 966 cdi->ops->generic_packet(cdi, &cgc); 967 968 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 969 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 970 cgc.cmd[2] = 2; /* Close session */ 971 cgc.quiet = 1; 972 cgc.timeout = 3000*HZ; 973 cdi->ops->generic_packet(cdi, &cgc); 974 975 cdi->media_written = 0; 976 } 977 978 static int cdrom_close_write(struct cdrom_device_info *cdi) 979 { 980 #if 0 981 return cdrom_flush_cache(cdi); 982 #else 983 return 0; 984 #endif 985 } 986 987 /* badly broken, I know. Is due for a fixup anytime. */ 988 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks) 989 { 990 struct cdrom_tochdr header; 991 struct cdrom_tocentry entry; 992 int ret, i; 993 tracks->data = 0; 994 tracks->audio = 0; 995 tracks->cdi = 0; 996 tracks->xa = 0; 997 tracks->error = 0; 998 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); 999 1000 if (!CDROM_CAN(CDC_PLAY_AUDIO)) { 1001 tracks->error = CDS_NO_INFO; 1002 return; 1003 } 1004 1005 /* Grab the TOC header so we can see how many tracks there are */ 1006 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 1007 if (ret) { 1008 if (ret == -ENOMEDIUM) 1009 tracks->error = CDS_NO_DISC; 1010 else 1011 tracks->error = CDS_NO_INFO; 1012 return; 1013 } 1014 /* check what type of tracks are on this disc */ 1015 entry.cdte_format = CDROM_MSF; 1016 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) { 1017 entry.cdte_track = i; 1018 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) { 1019 tracks->error = CDS_NO_INFO; 1020 return; 1021 } 1022 if (entry.cdte_ctrl & CDROM_DATA_TRACK) { 1023 if (entry.cdte_format == 0x10) 1024 tracks->cdi++; 1025 else if (entry.cdte_format == 0x20) 1026 tracks->xa++; 1027 else 1028 tracks->data++; 1029 } else { 1030 tracks->audio++; 1031 } 1032 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n", 1033 i, entry.cdte_format, entry.cdte_ctrl); 1034 } 1035 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n", 1036 header.cdth_trk1, tracks->audio, tracks->data, 1037 tracks->cdi, tracks->xa); 1038 } 1039 1040 static 1041 int open_for_data(struct cdrom_device_info *cdi) 1042 { 1043 int ret; 1044 const struct cdrom_device_ops *cdo = cdi->ops; 1045 tracktype tracks; 1046 cd_dbg(CD_OPEN, "entering open_for_data\n"); 1047 /* Check if the driver can report drive status. If it can, we 1048 can do clever things. If it can't, well, we at least tried! */ 1049 if (cdo->drive_status != NULL) { 1050 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1051 cd_dbg(CD_OPEN, "drive_status=%d\n", ret); 1052 if (ret == CDS_TRAY_OPEN) { 1053 cd_dbg(CD_OPEN, "the tray is open...\n"); 1054 /* can/may i close it? */ 1055 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1056 cdi->options & CDO_AUTO_CLOSE) { 1057 cd_dbg(CD_OPEN, "trying to close the tray\n"); 1058 ret=cdo->tray_move(cdi,0); 1059 if (ret) { 1060 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n"); 1061 /* Ignore the error from the low 1062 level driver. We don't care why it 1063 couldn't close the tray. We only care 1064 that there is no disc in the drive, 1065 since that is the _REAL_ problem here.*/ 1066 ret=-ENOMEDIUM; 1067 goto clean_up_and_return; 1068 } 1069 } else { 1070 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n"); 1071 ret=-ENOMEDIUM; 1072 goto clean_up_and_return; 1073 } 1074 /* Ok, the door should be closed now.. Check again */ 1075 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1076 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1077 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n"); 1078 cd_dbg(CD_OPEN, "tray might not contain a medium\n"); 1079 ret=-ENOMEDIUM; 1080 goto clean_up_and_return; 1081 } 1082 cd_dbg(CD_OPEN, "the tray is now closed\n"); 1083 } 1084 /* the door should be closed now, check for the disc */ 1085 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1086 if (ret!=CDS_DISC_OK) { 1087 ret = -ENOMEDIUM; 1088 goto clean_up_and_return; 1089 } 1090 } 1091 cdrom_count_tracks(cdi, &tracks); 1092 if (tracks.error == CDS_NO_DISC) { 1093 cd_dbg(CD_OPEN, "bummer. no disc.\n"); 1094 ret=-ENOMEDIUM; 1095 goto clean_up_and_return; 1096 } 1097 /* CD-Players which don't use O_NONBLOCK, workman 1098 * for example, need bit CDO_CHECK_TYPE cleared! */ 1099 if (tracks.data==0) { 1100 if (cdi->options & CDO_CHECK_TYPE) { 1101 /* give people a warning shot, now that CDO_CHECK_TYPE 1102 is the default case! */ 1103 cd_dbg(CD_OPEN, "bummer. wrong media type.\n"); 1104 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n", 1105 (unsigned int)task_pid_nr(current)); 1106 ret=-EMEDIUMTYPE; 1107 goto clean_up_and_return; 1108 } 1109 else { 1110 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n"); 1111 } 1112 } 1113 1114 cd_dbg(CD_OPEN, "all seems well, opening the devicen"); 1115 1116 /* all seems well, we can open the device */ 1117 ret = cdo->open(cdi, 0); /* open for data */ 1118 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret); 1119 /* After all this careful checking, we shouldn't have problems 1120 opening the device, but we don't want the device locked if 1121 this somehow fails... */ 1122 if (ret) { 1123 cd_dbg(CD_OPEN, "open device failed\n"); 1124 goto clean_up_and_return; 1125 } 1126 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) { 1127 cdo->lock_door(cdi, 1); 1128 cd_dbg(CD_OPEN, "door locked\n"); 1129 } 1130 cd_dbg(CD_OPEN, "device opened successfully\n"); 1131 return ret; 1132 1133 /* Something failed. Try to unlock the drive, because some drivers 1134 (notably ide-cd) lock the drive after every command. This produced 1135 a nasty bug where after mount failed, the drive would remain locked! 1136 This ensures that the drive gets unlocked after a mount fails. This 1137 is a goto to avoid bloating the driver with redundant code. */ 1138 clean_up_and_return: 1139 cd_dbg(CD_OPEN, "open failed\n"); 1140 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1141 cdo->lock_door(cdi, 0); 1142 cd_dbg(CD_OPEN, "door unlocked\n"); 1143 } 1144 return ret; 1145 } 1146 1147 /* We use the open-option O_NONBLOCK to indicate that the 1148 * purpose of opening is only for subsequent ioctl() calls; no device 1149 * integrity checks are performed. 1150 * 1151 * We hope that all cd-player programs will adopt this convention. It 1152 * is in their own interest: device control becomes a lot easier 1153 * this way. 1154 */ 1155 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, 1156 fmode_t mode) 1157 { 1158 int ret; 1159 1160 cd_dbg(CD_OPEN, "entering cdrom_open\n"); 1161 1162 /* if this was a O_NONBLOCK open and we should honor the flags, 1163 * do a quick open without drive/disc integrity checks. */ 1164 cdi->use_count++; 1165 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) { 1166 ret = cdi->ops->open(cdi, 1); 1167 } else { 1168 ret = open_for_data(cdi); 1169 if (ret) 1170 goto err; 1171 if (CDROM_CAN(CDC_GENERIC_PACKET)) 1172 cdrom_mmc3_profile(cdi); 1173 if (mode & FMODE_WRITE) { 1174 ret = -EROFS; 1175 if (cdrom_open_write(cdi)) 1176 goto err_release; 1177 if (!CDROM_CAN(CDC_RAM)) 1178 goto err_release; 1179 ret = 0; 1180 cdi->media_written = 0; 1181 } 1182 } 1183 1184 if (ret) 1185 goto err; 1186 1187 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1188 cdi->name, cdi->use_count); 1189 return 0; 1190 err_release: 1191 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1192 cdi->ops->lock_door(cdi, 0); 1193 cd_dbg(CD_OPEN, "door unlocked\n"); 1194 } 1195 cdi->ops->release(cdi); 1196 err: 1197 cdi->use_count--; 1198 return ret; 1199 } 1200 1201 /* This code is similar to that in open_for_data. The routine is called 1202 whenever an audio play operation is requested. 1203 */ 1204 static int check_for_audio_disc(struct cdrom_device_info *cdi, 1205 const struct cdrom_device_ops *cdo) 1206 { 1207 int ret; 1208 tracktype tracks; 1209 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n"); 1210 if (!(cdi->options & CDO_CHECK_TYPE)) 1211 return 0; 1212 if (cdo->drive_status != NULL) { 1213 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1214 cd_dbg(CD_OPEN, "drive_status=%d\n", ret); 1215 if (ret == CDS_TRAY_OPEN) { 1216 cd_dbg(CD_OPEN, "the tray is open...\n"); 1217 /* can/may i close it? */ 1218 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1219 cdi->options & CDO_AUTO_CLOSE) { 1220 cd_dbg(CD_OPEN, "trying to close the tray\n"); 1221 ret=cdo->tray_move(cdi,0); 1222 if (ret) { 1223 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n"); 1224 /* Ignore the error from the low 1225 level driver. We don't care why it 1226 couldn't close the tray. We only care 1227 that there is no disc in the drive, 1228 since that is the _REAL_ problem here.*/ 1229 return -ENOMEDIUM; 1230 } 1231 } else { 1232 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n"); 1233 return -ENOMEDIUM; 1234 } 1235 /* Ok, the door should be closed now.. Check again */ 1236 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1237 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1238 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n"); 1239 return -ENOMEDIUM; 1240 } 1241 if (ret!=CDS_DISC_OK) { 1242 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n"); 1243 return -EIO; 1244 } 1245 cd_dbg(CD_OPEN, "the tray is now closed\n"); 1246 } 1247 } 1248 cdrom_count_tracks(cdi, &tracks); 1249 if (tracks.error) 1250 return(tracks.error); 1251 1252 if (tracks.audio==0) 1253 return -EMEDIUMTYPE; 1254 1255 return 0; 1256 } 1257 1258 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode) 1259 { 1260 const struct cdrom_device_ops *cdo = cdi->ops; 1261 int opened_for_data; 1262 1263 cd_dbg(CD_CLOSE, "entering cdrom_release\n"); 1264 1265 if (cdi->use_count > 0) 1266 cdi->use_count--; 1267 1268 if (cdi->use_count == 0) { 1269 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", 1270 cdi->name); 1271 cdrom_dvd_rw_close_write(cdi); 1272 1273 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) { 1274 cd_dbg(CD_CLOSE, "Unlocking door!\n"); 1275 cdo->lock_door(cdi, 0); 1276 } 1277 } 1278 1279 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) || 1280 !(mode & FMODE_NDELAY); 1281 1282 /* 1283 * flush cache on last write release 1284 */ 1285 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data) 1286 cdrom_close_write(cdi); 1287 1288 cdo->release(cdi); 1289 if (cdi->use_count == 0) { /* last process that closes dev*/ 1290 if (opened_for_data && 1291 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY)) 1292 cdo->tray_move(cdi, 1); 1293 } 1294 } 1295 1296 static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 1297 struct cdrom_changer_info *buf) 1298 { 1299 struct packet_command cgc; 1300 const struct cdrom_device_ops *cdo = cdi->ops; 1301 int length; 1302 1303 /* 1304 * Sanyo changer isn't spec compliant (doesn't use regular change 1305 * LOAD_UNLOAD command, and it doesn't implement the mech status 1306 * command below 1307 */ 1308 if (cdi->sanyo_slot) { 1309 buf->hdr.nslots = 3; 1310 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot; 1311 for (length = 0; length < 3; length++) { 1312 buf->slots[length].disc_present = 1; 1313 buf->slots[length].change = 0; 1314 } 1315 return 0; 1316 } 1317 1318 length = sizeof(struct cdrom_mechstat_header) + 1319 cdi->capacity * sizeof(struct cdrom_slot); 1320 1321 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ); 1322 cgc.cmd[0] = GPCMD_MECHANISM_STATUS; 1323 cgc.cmd[8] = (length >> 8) & 0xff; 1324 cgc.cmd[9] = length & 0xff; 1325 return cdo->generic_packet(cdi, &cgc); 1326 } 1327 1328 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot) 1329 { 1330 struct cdrom_changer_info *info; 1331 int ret; 1332 1333 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n"); 1334 if (cdi->sanyo_slot) 1335 return CDS_NO_INFO; 1336 1337 info = kmalloc(sizeof(*info), GFP_KERNEL); 1338 if (!info) 1339 return -ENOMEM; 1340 1341 if ((ret = cdrom_read_mech_status(cdi, info))) 1342 goto out_free; 1343 1344 if (info->slots[slot].disc_present) 1345 ret = CDS_DISC_OK; 1346 else 1347 ret = CDS_NO_DISC; 1348 1349 out_free: 1350 kfree(info); 1351 return ret; 1352 } 1353 1354 /* Return the number of slots for an ATAPI/SCSI cdrom, 1355 * return 1 if not a changer. 1356 */ 1357 int cdrom_number_of_slots(struct cdrom_device_info *cdi) 1358 { 1359 int status; 1360 int nslots = 1; 1361 struct cdrom_changer_info *info; 1362 1363 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 1364 /* cdrom_read_mech_status requires a valid value for capacity: */ 1365 cdi->capacity = 0; 1366 1367 info = kmalloc(sizeof(*info), GFP_KERNEL); 1368 if (!info) 1369 return -ENOMEM; 1370 1371 if ((status = cdrom_read_mech_status(cdi, info)) == 0) 1372 nslots = info->hdr.nslots; 1373 1374 kfree(info); 1375 return nslots; 1376 } 1377 1378 1379 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */ 1380 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 1381 { 1382 struct packet_command cgc; 1383 1384 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n"); 1385 if (cdi->sanyo_slot && slot < 0) 1386 return 0; 1387 1388 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 1389 cgc.cmd[0] = GPCMD_LOAD_UNLOAD; 1390 cgc.cmd[4] = 2 + (slot >= 0); 1391 cgc.cmd[8] = slot; 1392 cgc.timeout = 60 * HZ; 1393 1394 /* The Sanyo 3 CD changer uses byte 7 of the 1395 GPCMD_TEST_UNIT_READY to command to switch CDs instead of 1396 using the GPCMD_LOAD_UNLOAD opcode. */ 1397 if (cdi->sanyo_slot && -1 < slot) { 1398 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 1399 cgc.cmd[7] = slot; 1400 cgc.cmd[4] = cgc.cmd[8] = 0; 1401 cdi->sanyo_slot = slot ? slot : 3; 1402 } 1403 1404 return cdi->ops->generic_packet(cdi, &cgc); 1405 } 1406 1407 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot) 1408 { 1409 struct cdrom_changer_info *info; 1410 int curslot; 1411 int ret; 1412 1413 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n"); 1414 if (!CDROM_CAN(CDC_SELECT_DISC)) 1415 return -EDRIVE_CANT_DO_THIS; 1416 1417 if (cdi->ops->check_events) 1418 cdi->ops->check_events(cdi, 0, slot); 1419 else 1420 cdi->ops->media_changed(cdi, slot); 1421 1422 if (slot == CDSL_NONE) { 1423 /* set media changed bits, on both queues */ 1424 cdi->mc_flags = 0x3; 1425 return cdrom_load_unload(cdi, -1); 1426 } 1427 1428 info = kmalloc(sizeof(*info), GFP_KERNEL); 1429 if (!info) 1430 return -ENOMEM; 1431 1432 if ((ret = cdrom_read_mech_status(cdi, info))) { 1433 kfree(info); 1434 return ret; 1435 } 1436 1437 curslot = info->hdr.curslot; 1438 kfree(info); 1439 1440 if (cdi->use_count > 1 || cdi->keeplocked) { 1441 if (slot == CDSL_CURRENT) { 1442 return curslot; 1443 } else { 1444 return -EBUSY; 1445 } 1446 } 1447 1448 /* Specifying CDSL_CURRENT will attempt to load the currnet slot, 1449 which is useful if it had been previously unloaded. 1450 Whether it can or not, it returns the current slot. 1451 Similarly, if slot happens to be the current one, we still 1452 try and load it. */ 1453 if (slot == CDSL_CURRENT) 1454 slot = curslot; 1455 1456 /* set media changed bits on both queues */ 1457 cdi->mc_flags = 0x3; 1458 if ((ret = cdrom_load_unload(cdi, slot))) 1459 return ret; 1460 1461 return slot; 1462 } 1463 1464 /* 1465 * As cdrom implements an extra ioctl consumer for media changed 1466 * event, it needs to buffer ->check_events() output, such that event 1467 * is not lost for both the usual VFS and ioctl paths. 1468 * cdi->{vfs|ioctl}_events are used to buffer pending events for each 1469 * path. 1470 * 1471 * XXX: Locking is non-existent. cdi->ops->check_events() can be 1472 * called in parallel and buffering fields are accessed without any 1473 * exclusion. The original media_changed code had the same problem. 1474 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl 1475 * and remove this cruft altogether. It doesn't have much usefulness 1476 * at this point. 1477 */ 1478 static void cdrom_update_events(struct cdrom_device_info *cdi, 1479 unsigned int clearing) 1480 { 1481 unsigned int events; 1482 1483 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT); 1484 cdi->vfs_events |= events; 1485 cdi->ioctl_events |= events; 1486 } 1487 1488 unsigned int cdrom_check_events(struct cdrom_device_info *cdi, 1489 unsigned int clearing) 1490 { 1491 unsigned int events; 1492 1493 cdrom_update_events(cdi, clearing); 1494 events = cdi->vfs_events; 1495 cdi->vfs_events = 0; 1496 return events; 1497 } 1498 EXPORT_SYMBOL(cdrom_check_events); 1499 1500 /* We want to make media_changed accessible to the user through an 1501 * ioctl. The main problem now is that we must double-buffer the 1502 * low-level implementation, to assure that the VFS and the user both 1503 * see a medium change once. 1504 */ 1505 1506 static 1507 int media_changed(struct cdrom_device_info *cdi, int queue) 1508 { 1509 unsigned int mask = (1 << (queue & 1)); 1510 int ret = !!(cdi->mc_flags & mask); 1511 bool changed; 1512 1513 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1514 return ret; 1515 1516 /* changed since last call? */ 1517 if (cdi->ops->check_events) { 1518 BUG_ON(!queue); /* shouldn't be called from VFS path */ 1519 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE); 1520 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE; 1521 cdi->ioctl_events = 0; 1522 } else 1523 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT); 1524 1525 if (changed) { 1526 cdi->mc_flags = 0x3; /* set bit on both queues */ 1527 ret |= 1; 1528 cdi->media_written = 0; 1529 } 1530 1531 cdi->mc_flags &= ~mask; /* clear bit */ 1532 return ret; 1533 } 1534 1535 int cdrom_media_changed(struct cdrom_device_info *cdi) 1536 { 1537 /* This talks to the VFS, which doesn't like errors - just 1 or 0. 1538 * Returning "0" is always safe (media hasn't been changed). Do that 1539 * if the low-level cdrom driver dosn't support media changed. */ 1540 if (cdi == NULL || cdi->ops->media_changed == NULL) 1541 return 0; 1542 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1543 return 0; 1544 return media_changed(cdi, 0); 1545 } 1546 1547 /* Requests to the low-level drivers will /always/ be done in the 1548 following format convention: 1549 1550 CDROM_LBA: all data-related requests. 1551 CDROM_MSF: all audio-related requests. 1552 1553 However, a low-level implementation is allowed to refuse this 1554 request, and return information in its own favorite format. 1555 1556 It doesn't make sense /at all/ to ask for a play_audio in LBA 1557 format, or ask for multi-session info in MSF format. However, for 1558 backward compatibility these format requests will be satisfied, but 1559 the requests to the low-level drivers will be sanitized in the more 1560 meaningful format indicated above. 1561 */ 1562 1563 static 1564 void sanitize_format(union cdrom_addr *addr, 1565 u_char * curr, u_char requested) 1566 { 1567 if (*curr == requested) 1568 return; /* nothing to be done! */ 1569 if (requested == CDROM_LBA) { 1570 addr->lba = (int) addr->msf.frame + 1571 75 * (addr->msf.second - 2 + 60 * addr->msf.minute); 1572 } else { /* CDROM_MSF */ 1573 int lba = addr->lba; 1574 addr->msf.frame = lba % 75; 1575 lba /= 75; 1576 lba += 2; 1577 addr->msf.second = lba % 60; 1578 addr->msf.minute = lba / 60; 1579 } 1580 *curr = requested; 1581 } 1582 1583 void init_cdrom_command(struct packet_command *cgc, void *buf, int len, 1584 int type) 1585 { 1586 memset(cgc, 0, sizeof(struct packet_command)); 1587 if (buf) 1588 memset(buf, 0, len); 1589 cgc->buffer = (char *) buf; 1590 cgc->buflen = len; 1591 cgc->data_direction = type; 1592 cgc->timeout = CDROM_DEF_TIMEOUT; 1593 } 1594 1595 /* DVD handling */ 1596 1597 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) 1598 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) 1599 1600 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type) 1601 { 1602 cgc->cmd[0] = GPCMD_REPORT_KEY; 1603 cgc->cmd[10] = type | (agid << 6); 1604 switch (type) { 1605 case 0: case 8: case 5: { 1606 cgc->buflen = 8; 1607 break; 1608 } 1609 case 1: { 1610 cgc->buflen = 16; 1611 break; 1612 } 1613 case 2: case 4: { 1614 cgc->buflen = 12; 1615 break; 1616 } 1617 } 1618 cgc->cmd[9] = cgc->buflen; 1619 cgc->data_direction = CGC_DATA_READ; 1620 } 1621 1622 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type) 1623 { 1624 cgc->cmd[0] = GPCMD_SEND_KEY; 1625 cgc->cmd[10] = type | (agid << 6); 1626 switch (type) { 1627 case 1: { 1628 cgc->buflen = 16; 1629 break; 1630 } 1631 case 3: { 1632 cgc->buflen = 12; 1633 break; 1634 } 1635 case 6: { 1636 cgc->buflen = 8; 1637 break; 1638 } 1639 } 1640 cgc->cmd[9] = cgc->buflen; 1641 cgc->data_direction = CGC_DATA_WRITE; 1642 } 1643 1644 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai) 1645 { 1646 int ret; 1647 u_char buf[20]; 1648 struct packet_command cgc; 1649 const struct cdrom_device_ops *cdo = cdi->ops; 1650 rpc_state_t rpc_state; 1651 1652 memset(buf, 0, sizeof(buf)); 1653 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ); 1654 1655 switch (ai->type) { 1656 /* LU data send */ 1657 case DVD_LU_SEND_AGID: 1658 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n"); 1659 cgc.quiet = 1; 1660 setup_report_key(&cgc, ai->lsa.agid, 0); 1661 1662 if ((ret = cdo->generic_packet(cdi, &cgc))) 1663 return ret; 1664 1665 ai->lsa.agid = buf[7] >> 6; 1666 /* Returning data, let host change state */ 1667 break; 1668 1669 case DVD_LU_SEND_KEY1: 1670 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n"); 1671 setup_report_key(&cgc, ai->lsk.agid, 2); 1672 1673 if ((ret = cdo->generic_packet(cdi, &cgc))) 1674 return ret; 1675 1676 copy_key(ai->lsk.key, &buf[4]); 1677 /* Returning data, let host change state */ 1678 break; 1679 1680 case DVD_LU_SEND_CHALLENGE: 1681 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n"); 1682 setup_report_key(&cgc, ai->lsc.agid, 1); 1683 1684 if ((ret = cdo->generic_packet(cdi, &cgc))) 1685 return ret; 1686 1687 copy_chal(ai->lsc.chal, &buf[4]); 1688 /* Returning data, let host change state */ 1689 break; 1690 1691 /* Post-auth key */ 1692 case DVD_LU_SEND_TITLE_KEY: 1693 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n"); 1694 cgc.quiet = 1; 1695 setup_report_key(&cgc, ai->lstk.agid, 4); 1696 cgc.cmd[5] = ai->lstk.lba; 1697 cgc.cmd[4] = ai->lstk.lba >> 8; 1698 cgc.cmd[3] = ai->lstk.lba >> 16; 1699 cgc.cmd[2] = ai->lstk.lba >> 24; 1700 1701 if ((ret = cdo->generic_packet(cdi, &cgc))) 1702 return ret; 1703 1704 ai->lstk.cpm = (buf[4] >> 7) & 1; 1705 ai->lstk.cp_sec = (buf[4] >> 6) & 1; 1706 ai->lstk.cgms = (buf[4] >> 4) & 3; 1707 copy_key(ai->lstk.title_key, &buf[5]); 1708 /* Returning data, let host change state */ 1709 break; 1710 1711 case DVD_LU_SEND_ASF: 1712 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n"); 1713 setup_report_key(&cgc, ai->lsasf.agid, 5); 1714 1715 if ((ret = cdo->generic_packet(cdi, &cgc))) 1716 return ret; 1717 1718 ai->lsasf.asf = buf[7] & 1; 1719 break; 1720 1721 /* LU data receive (LU changes state) */ 1722 case DVD_HOST_SEND_CHALLENGE: 1723 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n"); 1724 setup_send_key(&cgc, ai->hsc.agid, 1); 1725 buf[1] = 0xe; 1726 copy_chal(&buf[4], ai->hsc.chal); 1727 1728 if ((ret = cdo->generic_packet(cdi, &cgc))) 1729 return ret; 1730 1731 ai->type = DVD_LU_SEND_KEY1; 1732 break; 1733 1734 case DVD_HOST_SEND_KEY2: 1735 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n"); 1736 setup_send_key(&cgc, ai->hsk.agid, 3); 1737 buf[1] = 0xa; 1738 copy_key(&buf[4], ai->hsk.key); 1739 1740 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1741 ai->type = DVD_AUTH_FAILURE; 1742 return ret; 1743 } 1744 ai->type = DVD_AUTH_ESTABLISHED; 1745 break; 1746 1747 /* Misc */ 1748 case DVD_INVALIDATE_AGID: 1749 cgc.quiet = 1; 1750 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n"); 1751 setup_report_key(&cgc, ai->lsa.agid, 0x3f); 1752 if ((ret = cdo->generic_packet(cdi, &cgc))) 1753 return ret; 1754 break; 1755 1756 /* Get region settings */ 1757 case DVD_LU_SEND_RPC_STATE: 1758 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n"); 1759 setup_report_key(&cgc, 0, 8); 1760 memset(&rpc_state, 0, sizeof(rpc_state_t)); 1761 cgc.buffer = (char *) &rpc_state; 1762 1763 if ((ret = cdo->generic_packet(cdi, &cgc))) 1764 return ret; 1765 1766 ai->lrpcs.type = rpc_state.type_code; 1767 ai->lrpcs.vra = rpc_state.vra; 1768 ai->lrpcs.ucca = rpc_state.ucca; 1769 ai->lrpcs.region_mask = rpc_state.region_mask; 1770 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; 1771 break; 1772 1773 /* Set region settings */ 1774 case DVD_HOST_SEND_RPC_STATE: 1775 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n"); 1776 setup_send_key(&cgc, 0, 6); 1777 buf[1] = 6; 1778 buf[4] = ai->hrpcs.pdrc; 1779 1780 if ((ret = cdo->generic_packet(cdi, &cgc))) 1781 return ret; 1782 break; 1783 1784 default: 1785 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type); 1786 return -ENOTTY; 1787 } 1788 1789 return 0; 1790 } 1791 1792 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s, 1793 struct packet_command *cgc) 1794 { 1795 unsigned char buf[21], *base; 1796 struct dvd_layer *layer; 1797 const struct cdrom_device_ops *cdo = cdi->ops; 1798 int ret, layer_num = s->physical.layer_num; 1799 1800 if (layer_num >= DVD_LAYERS) 1801 return -EINVAL; 1802 1803 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1804 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1805 cgc->cmd[6] = layer_num; 1806 cgc->cmd[7] = s->type; 1807 cgc->cmd[9] = cgc->buflen & 0xff; 1808 1809 /* 1810 * refrain from reporting errors on non-existing layers (mainly) 1811 */ 1812 cgc->quiet = 1; 1813 1814 ret = cdo->generic_packet(cdi, cgc); 1815 if (ret) 1816 return ret; 1817 1818 base = &buf[4]; 1819 layer = &s->physical.layer[layer_num]; 1820 1821 /* 1822 * place the data... really ugly, but at least we won't have to 1823 * worry about endianess in userspace. 1824 */ 1825 memset(layer, 0, sizeof(*layer)); 1826 layer->book_version = base[0] & 0xf; 1827 layer->book_type = base[0] >> 4; 1828 layer->min_rate = base[1] & 0xf; 1829 layer->disc_size = base[1] >> 4; 1830 layer->layer_type = base[2] & 0xf; 1831 layer->track_path = (base[2] >> 4) & 1; 1832 layer->nlayers = (base[2] >> 5) & 3; 1833 layer->track_density = base[3] & 0xf; 1834 layer->linear_density = base[3] >> 4; 1835 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7]; 1836 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11]; 1837 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15]; 1838 layer->bca = base[16] >> 7; 1839 1840 return 0; 1841 } 1842 1843 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s, 1844 struct packet_command *cgc) 1845 { 1846 int ret; 1847 u_char buf[8]; 1848 const struct cdrom_device_ops *cdo = cdi->ops; 1849 1850 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1851 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1852 cgc->cmd[6] = s->copyright.layer_num; 1853 cgc->cmd[7] = s->type; 1854 cgc->cmd[8] = cgc->buflen >> 8; 1855 cgc->cmd[9] = cgc->buflen & 0xff; 1856 1857 ret = cdo->generic_packet(cdi, cgc); 1858 if (ret) 1859 return ret; 1860 1861 s->copyright.cpst = buf[4]; 1862 s->copyright.rmi = buf[5]; 1863 1864 return 0; 1865 } 1866 1867 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s, 1868 struct packet_command *cgc) 1869 { 1870 int ret, size; 1871 u_char *buf; 1872 const struct cdrom_device_ops *cdo = cdi->ops; 1873 1874 size = sizeof(s->disckey.value) + 4; 1875 1876 buf = kmalloc(size, GFP_KERNEL); 1877 if (!buf) 1878 return -ENOMEM; 1879 1880 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1881 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1882 cgc->cmd[7] = s->type; 1883 cgc->cmd[8] = size >> 8; 1884 cgc->cmd[9] = size & 0xff; 1885 cgc->cmd[10] = s->disckey.agid << 6; 1886 1887 ret = cdo->generic_packet(cdi, cgc); 1888 if (!ret) 1889 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value)); 1890 1891 kfree(buf); 1892 return ret; 1893 } 1894 1895 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s, 1896 struct packet_command *cgc) 1897 { 1898 int ret, size = 4 + 188; 1899 u_char *buf; 1900 const struct cdrom_device_ops *cdo = cdi->ops; 1901 1902 buf = kmalloc(size, GFP_KERNEL); 1903 if (!buf) 1904 return -ENOMEM; 1905 1906 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1907 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1908 cgc->cmd[7] = s->type; 1909 cgc->cmd[9] = cgc->buflen & 0xff; 1910 1911 ret = cdo->generic_packet(cdi, cgc); 1912 if (ret) 1913 goto out; 1914 1915 s->bca.len = buf[0] << 8 | buf[1]; 1916 if (s->bca.len < 12 || s->bca.len > 188) { 1917 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n", 1918 s->bca.len); 1919 ret = -EIO; 1920 goto out; 1921 } 1922 memcpy(s->bca.value, &buf[4], s->bca.len); 1923 ret = 0; 1924 out: 1925 kfree(buf); 1926 return ret; 1927 } 1928 1929 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s, 1930 struct packet_command *cgc) 1931 { 1932 int ret = 0, size; 1933 u_char *buf; 1934 const struct cdrom_device_ops *cdo = cdi->ops; 1935 1936 size = sizeof(s->manufact.value) + 4; 1937 1938 buf = kmalloc(size, GFP_KERNEL); 1939 if (!buf) 1940 return -ENOMEM; 1941 1942 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1943 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1944 cgc->cmd[7] = s->type; 1945 cgc->cmd[8] = size >> 8; 1946 cgc->cmd[9] = size & 0xff; 1947 1948 ret = cdo->generic_packet(cdi, cgc); 1949 if (ret) 1950 goto out; 1951 1952 s->manufact.len = buf[0] << 8 | buf[1]; 1953 if (s->manufact.len < 0) { 1954 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n", 1955 s->manufact.len); 1956 ret = -EIO; 1957 } else { 1958 if (s->manufact.len > 2048) { 1959 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n", 1960 s->manufact.len); 1961 s->manufact.len = 2048; 1962 } 1963 memcpy(s->manufact.value, &buf[4], s->manufact.len); 1964 } 1965 1966 out: 1967 kfree(buf); 1968 return ret; 1969 } 1970 1971 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s, 1972 struct packet_command *cgc) 1973 { 1974 switch (s->type) { 1975 case DVD_STRUCT_PHYSICAL: 1976 return dvd_read_physical(cdi, s, cgc); 1977 1978 case DVD_STRUCT_COPYRIGHT: 1979 return dvd_read_copyright(cdi, s, cgc); 1980 1981 case DVD_STRUCT_DISCKEY: 1982 return dvd_read_disckey(cdi, s, cgc); 1983 1984 case DVD_STRUCT_BCA: 1985 return dvd_read_bca(cdi, s, cgc); 1986 1987 case DVD_STRUCT_MANUFACT: 1988 return dvd_read_manufact(cdi, s, cgc); 1989 1990 default: 1991 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n", 1992 s->type); 1993 return -EINVAL; 1994 } 1995 } 1996 1997 int cdrom_mode_sense(struct cdrom_device_info *cdi, 1998 struct packet_command *cgc, 1999 int page_code, int page_control) 2000 { 2001 const struct cdrom_device_ops *cdo = cdi->ops; 2002 2003 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 2004 2005 cgc->cmd[0] = GPCMD_MODE_SENSE_10; 2006 cgc->cmd[2] = page_code | (page_control << 6); 2007 cgc->cmd[7] = cgc->buflen >> 8; 2008 cgc->cmd[8] = cgc->buflen & 0xff; 2009 cgc->data_direction = CGC_DATA_READ; 2010 return cdo->generic_packet(cdi, cgc); 2011 } 2012 2013 int cdrom_mode_select(struct cdrom_device_info *cdi, 2014 struct packet_command *cgc) 2015 { 2016 const struct cdrom_device_ops *cdo = cdi->ops; 2017 2018 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 2019 memset(cgc->buffer, 0, 2); 2020 cgc->cmd[0] = GPCMD_MODE_SELECT_10; 2021 cgc->cmd[1] = 0x10; /* PF */ 2022 cgc->cmd[7] = cgc->buflen >> 8; 2023 cgc->cmd[8] = cgc->buflen & 0xff; 2024 cgc->data_direction = CGC_DATA_WRITE; 2025 return cdo->generic_packet(cdi, cgc); 2026 } 2027 2028 static int cdrom_read_subchannel(struct cdrom_device_info *cdi, 2029 struct cdrom_subchnl *subchnl, int mcn) 2030 { 2031 const struct cdrom_device_ops *cdo = cdi->ops; 2032 struct packet_command cgc; 2033 char buffer[32]; 2034 int ret; 2035 2036 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ); 2037 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 2038 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */ 2039 cgc.cmd[2] = 0x40; /* request subQ data */ 2040 cgc.cmd[3] = mcn ? 2 : 1; 2041 cgc.cmd[8] = 16; 2042 2043 if ((ret = cdo->generic_packet(cdi, &cgc))) 2044 return ret; 2045 2046 subchnl->cdsc_audiostatus = cgc.buffer[1]; 2047 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf; 2048 subchnl->cdsc_trk = cgc.buffer[6]; 2049 subchnl->cdsc_ind = cgc.buffer[7]; 2050 2051 if (subchnl->cdsc_format == CDROM_LBA) { 2052 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) | 2053 (cgc.buffer[9] << 16) | 2054 (cgc.buffer[10] << 8) | 2055 (cgc.buffer[11])); 2056 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) | 2057 (cgc.buffer[13] << 16) | 2058 (cgc.buffer[14] << 8) | 2059 (cgc.buffer[15])); 2060 } else { 2061 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13]; 2062 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14]; 2063 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15]; 2064 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9]; 2065 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10]; 2066 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11]; 2067 } 2068 2069 return 0; 2070 } 2071 2072 /* 2073 * Specific READ_10 interface 2074 */ 2075 static int cdrom_read_cd(struct cdrom_device_info *cdi, 2076 struct packet_command *cgc, int lba, 2077 int blocksize, int nblocks) 2078 { 2079 const struct cdrom_device_ops *cdo = cdi->ops; 2080 2081 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2082 cgc->cmd[0] = GPCMD_READ_10; 2083 cgc->cmd[2] = (lba >> 24) & 0xff; 2084 cgc->cmd[3] = (lba >> 16) & 0xff; 2085 cgc->cmd[4] = (lba >> 8) & 0xff; 2086 cgc->cmd[5] = lba & 0xff; 2087 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2088 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2089 cgc->cmd[8] = nblocks & 0xff; 2090 cgc->buflen = blocksize * nblocks; 2091 return cdo->generic_packet(cdi, cgc); 2092 } 2093 2094 /* very generic interface for reading the various types of blocks */ 2095 static int cdrom_read_block(struct cdrom_device_info *cdi, 2096 struct packet_command *cgc, 2097 int lba, int nblocks, int format, int blksize) 2098 { 2099 const struct cdrom_device_ops *cdo = cdi->ops; 2100 2101 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2102 cgc->cmd[0] = GPCMD_READ_CD; 2103 /* expected sector size - cdda,mode1,etc. */ 2104 cgc->cmd[1] = format << 2; 2105 /* starting address */ 2106 cgc->cmd[2] = (lba >> 24) & 0xff; 2107 cgc->cmd[3] = (lba >> 16) & 0xff; 2108 cgc->cmd[4] = (lba >> 8) & 0xff; 2109 cgc->cmd[5] = lba & 0xff; 2110 /* number of blocks */ 2111 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2112 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2113 cgc->cmd[8] = nblocks & 0xff; 2114 cgc->buflen = blksize * nblocks; 2115 2116 /* set the header info returned */ 2117 switch (blksize) { 2118 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break; 2119 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break; 2120 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break; 2121 default : cgc->cmd[9] = 0x10; 2122 } 2123 2124 return cdo->generic_packet(cdi, cgc); 2125 } 2126 2127 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2128 int lba, int nframes) 2129 { 2130 struct packet_command cgc; 2131 int ret = 0; 2132 int nr; 2133 2134 cdi->last_sense = 0; 2135 2136 memset(&cgc, 0, sizeof(cgc)); 2137 2138 /* 2139 * start with will ra.nframes size, back down if alloc fails 2140 */ 2141 nr = nframes; 2142 do { 2143 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL); 2144 if (cgc.buffer) 2145 break; 2146 2147 nr >>= 1; 2148 } while (nr); 2149 2150 if (!nr) 2151 return -ENOMEM; 2152 2153 cgc.data_direction = CGC_DATA_READ; 2154 while (nframes > 0) { 2155 if (nr > nframes) 2156 nr = nframes; 2157 2158 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW); 2159 if (ret) 2160 break; 2161 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) { 2162 ret = -EFAULT; 2163 break; 2164 } 2165 ubuf += CD_FRAMESIZE_RAW * nr; 2166 nframes -= nr; 2167 lba += nr; 2168 } 2169 kfree(cgc.buffer); 2170 return ret; 2171 } 2172 2173 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2174 int lba, int nframes) 2175 { 2176 struct request_queue *q = cdi->disk->queue; 2177 struct request *rq; 2178 struct scsi_request *req; 2179 struct bio *bio; 2180 unsigned int len; 2181 int nr, ret = 0; 2182 2183 if (!q) 2184 return -ENXIO; 2185 2186 if (!blk_queue_scsi_passthrough(q)) { 2187 WARN_ONCE(true, 2188 "Attempt read CDDA info through a non-SCSI queue\n"); 2189 return -EINVAL; 2190 } 2191 2192 cdi->last_sense = 0; 2193 2194 while (nframes) { 2195 nr = nframes; 2196 if (cdi->cdda_method == CDDA_BPC_SINGLE) 2197 nr = 1; 2198 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9)) 2199 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW; 2200 2201 len = nr * CD_FRAMESIZE_RAW; 2202 2203 rq = blk_get_request(q, REQ_OP_SCSI_IN, 0); 2204 if (IS_ERR(rq)) { 2205 ret = PTR_ERR(rq); 2206 break; 2207 } 2208 req = scsi_req(rq); 2209 2210 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL); 2211 if (ret) { 2212 blk_put_request(rq); 2213 break; 2214 } 2215 2216 req->cmd[0] = GPCMD_READ_CD; 2217 req->cmd[1] = 1 << 2; 2218 req->cmd[2] = (lba >> 24) & 0xff; 2219 req->cmd[3] = (lba >> 16) & 0xff; 2220 req->cmd[4] = (lba >> 8) & 0xff; 2221 req->cmd[5] = lba & 0xff; 2222 req->cmd[6] = (nr >> 16) & 0xff; 2223 req->cmd[7] = (nr >> 8) & 0xff; 2224 req->cmd[8] = nr & 0xff; 2225 req->cmd[9] = 0xf8; 2226 2227 req->cmd_len = 12; 2228 rq->timeout = 60 * HZ; 2229 bio = rq->bio; 2230 2231 blk_execute_rq(q, cdi->disk, rq, 0); 2232 if (scsi_req(rq)->result) { 2233 struct scsi_sense_hdr sshdr; 2234 2235 ret = -EIO; 2236 scsi_normalize_sense(req->sense, req->sense_len, 2237 &sshdr); 2238 cdi->last_sense = sshdr.sense_key; 2239 } 2240 2241 if (blk_rq_unmap_user(bio)) 2242 ret = -EFAULT; 2243 blk_put_request(rq); 2244 2245 if (ret) 2246 break; 2247 2248 nframes -= nr; 2249 lba += nr; 2250 ubuf += len; 2251 } 2252 2253 return ret; 2254 } 2255 2256 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2257 int lba, int nframes) 2258 { 2259 int ret; 2260 2261 if (cdi->cdda_method == CDDA_OLD) 2262 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2263 2264 retry: 2265 /* 2266 * for anything else than success and io error, we need to retry 2267 */ 2268 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes); 2269 if (!ret || ret != -EIO) 2270 return ret; 2271 2272 /* 2273 * I've seen drives get sense 4/8/3 udma crc errors on multi 2274 * frame dma, so drop to single frame dma if we need to 2275 */ 2276 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) { 2277 pr_info("dropping to single frame dma\n"); 2278 cdi->cdda_method = CDDA_BPC_SINGLE; 2279 goto retry; 2280 } 2281 2282 /* 2283 * so we have an io error of some sort with multi frame dma. if the 2284 * condition wasn't a hardware error 2285 * problems, not for any error 2286 */ 2287 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b) 2288 return ret; 2289 2290 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense); 2291 cdi->cdda_method = CDDA_OLD; 2292 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2293 } 2294 2295 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi, 2296 void __user *argp) 2297 { 2298 struct cdrom_multisession ms_info; 2299 u8 requested_format; 2300 int ret; 2301 2302 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n"); 2303 2304 if (!(cdi->ops->capability & CDC_MULTI_SESSION)) 2305 return -ENOSYS; 2306 2307 if (copy_from_user(&ms_info, argp, sizeof(ms_info))) 2308 return -EFAULT; 2309 2310 requested_format = ms_info.addr_format; 2311 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2312 return -EINVAL; 2313 ms_info.addr_format = CDROM_LBA; 2314 2315 ret = cdi->ops->get_last_session(cdi, &ms_info); 2316 if (ret) 2317 return ret; 2318 2319 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format); 2320 2321 if (copy_to_user(argp, &ms_info, sizeof(ms_info))) 2322 return -EFAULT; 2323 2324 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n"); 2325 return 0; 2326 } 2327 2328 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi) 2329 { 2330 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n"); 2331 2332 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2333 return -ENOSYS; 2334 if (cdi->use_count != 1 || cdi->keeplocked) 2335 return -EBUSY; 2336 if (CDROM_CAN(CDC_LOCK)) { 2337 int ret = cdi->ops->lock_door(cdi, 0); 2338 if (ret) 2339 return ret; 2340 } 2341 2342 return cdi->ops->tray_move(cdi, 1); 2343 } 2344 2345 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi) 2346 { 2347 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n"); 2348 2349 if (!CDROM_CAN(CDC_CLOSE_TRAY)) 2350 return -ENOSYS; 2351 return cdi->ops->tray_move(cdi, 0); 2352 } 2353 2354 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi, 2355 unsigned long arg) 2356 { 2357 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n"); 2358 2359 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2360 return -ENOSYS; 2361 if (cdi->keeplocked) 2362 return -EBUSY; 2363 2364 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT); 2365 if (arg) 2366 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT; 2367 return 0; 2368 } 2369 2370 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, 2371 unsigned long arg) 2372 { 2373 struct cdrom_changer_info *info; 2374 int ret; 2375 2376 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 2377 2378 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2379 return -ENOSYS; 2380 2381 /* cannot select disc or select current disc */ 2382 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) 2383 return media_changed(cdi, 1); 2384 2385 if (arg >= cdi->capacity) 2386 return -EINVAL; 2387 2388 info = kmalloc(sizeof(*info), GFP_KERNEL); 2389 if (!info) 2390 return -ENOMEM; 2391 2392 ret = cdrom_read_mech_status(cdi, info); 2393 if (!ret) 2394 ret = info->slots[arg].change; 2395 kfree(info); 2396 return ret; 2397 } 2398 2399 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi, 2400 unsigned long arg) 2401 { 2402 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n"); 2403 2404 /* 2405 * Options need to be in sync with capability. 2406 * Too late for that, so we have to check each one separately. 2407 */ 2408 switch (arg) { 2409 case CDO_USE_FFLAGS: 2410 case CDO_CHECK_TYPE: 2411 break; 2412 case CDO_LOCK: 2413 if (!CDROM_CAN(CDC_LOCK)) 2414 return -ENOSYS; 2415 break; 2416 case 0: 2417 return cdi->options; 2418 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */ 2419 default: 2420 if (!CDROM_CAN(arg)) 2421 return -ENOSYS; 2422 } 2423 cdi->options |= (int) arg; 2424 return cdi->options; 2425 } 2426 2427 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi, 2428 unsigned long arg) 2429 { 2430 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n"); 2431 2432 cdi->options &= ~(int) arg; 2433 return cdi->options; 2434 } 2435 2436 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi, 2437 unsigned long arg) 2438 { 2439 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n"); 2440 2441 if (!CDROM_CAN(CDC_SELECT_SPEED)) 2442 return -ENOSYS; 2443 return cdi->ops->select_speed(cdi, arg); 2444 } 2445 2446 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, 2447 unsigned long arg) 2448 { 2449 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n"); 2450 2451 if (!CDROM_CAN(CDC_SELECT_DISC)) 2452 return -ENOSYS; 2453 2454 if (arg != CDSL_CURRENT && arg != CDSL_NONE) { 2455 if (arg >= cdi->capacity) 2456 return -EINVAL; 2457 } 2458 2459 /* 2460 * ->select_disc is a hook to allow a driver-specific way of 2461 * seleting disc. However, since there is no equivalent hook for 2462 * cdrom_slot_status this may not actually be useful... 2463 */ 2464 if (cdi->ops->select_disc) 2465 return cdi->ops->select_disc(cdi, arg); 2466 2467 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n"); 2468 return cdrom_select_disc(cdi, arg); 2469 } 2470 2471 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi, 2472 struct block_device *bdev) 2473 { 2474 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n"); 2475 2476 if (!capable(CAP_SYS_ADMIN)) 2477 return -EACCES; 2478 if (!CDROM_CAN(CDC_RESET)) 2479 return -ENOSYS; 2480 invalidate_bdev(bdev); 2481 return cdi->ops->reset(cdi); 2482 } 2483 2484 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi, 2485 unsigned long arg) 2486 { 2487 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl"); 2488 2489 if (!CDROM_CAN(CDC_LOCK)) 2490 return -EDRIVE_CANT_DO_THIS; 2491 2492 cdi->keeplocked = arg ? 1 : 0; 2493 2494 /* 2495 * Don't unlock the door on multiple opens by default, but allow 2496 * root to do so. 2497 */ 2498 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN)) 2499 return -EBUSY; 2500 return cdi->ops->lock_door(cdi, arg); 2501 } 2502 2503 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi, 2504 unsigned long arg) 2505 { 2506 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis"); 2507 2508 if (!capable(CAP_SYS_ADMIN)) 2509 return -EACCES; 2510 debug = arg ? 1 : 0; 2511 return debug; 2512 } 2513 2514 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi) 2515 { 2516 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n"); 2517 return (cdi->ops->capability & ~cdi->mask); 2518 } 2519 2520 /* 2521 * The following function is implemented, although very few audio 2522 * discs give Universal Product Code information, which should just be 2523 * the Medium Catalog Number on the box. Note, that the way the code 2524 * is written on the CD is /not/ uniform across all discs! 2525 */ 2526 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi, 2527 void __user *argp) 2528 { 2529 struct cdrom_mcn mcn; 2530 int ret; 2531 2532 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n"); 2533 2534 if (!(cdi->ops->capability & CDC_MCN)) 2535 return -ENOSYS; 2536 ret = cdi->ops->get_mcn(cdi, &mcn); 2537 if (ret) 2538 return ret; 2539 2540 if (copy_to_user(argp, &mcn, sizeof(mcn))) 2541 return -EFAULT; 2542 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n"); 2543 return 0; 2544 } 2545 2546 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi, 2547 unsigned long arg) 2548 { 2549 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n"); 2550 2551 if (!(cdi->ops->capability & CDC_DRIVE_STATUS)) 2552 return -ENOSYS; 2553 if (!CDROM_CAN(CDC_SELECT_DISC) || 2554 (arg == CDSL_CURRENT || arg == CDSL_NONE)) 2555 return cdi->ops->drive_status(cdi, CDSL_CURRENT); 2556 if (arg >= cdi->capacity) 2557 return -EINVAL; 2558 return cdrom_slot_status(cdi, arg); 2559 } 2560 2561 /* 2562 * Ok, this is where problems start. The current interface for the 2563 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that 2564 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this 2565 * is often the case, it is also very common for CDs to have some tracks 2566 * with data, and some tracks with audio. Just because I feel like it, 2567 * I declare the following to be the best way to cope. If the CD has ANY 2568 * data tracks on it, it will be returned as a data CD. If it has any XA 2569 * tracks, I will return it as that. Now I could simplify this interface 2570 * by combining these returns with the above, but this more clearly 2571 * demonstrates the problem with the current interface. Too bad this 2572 * wasn't designed to use bitmasks... -Erik 2573 * 2574 * Well, now we have the option CDS_MIXED: a mixed-type CD. 2575 * User level programmers might feel the ioctl is not very useful. 2576 * ---david 2577 */ 2578 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi) 2579 { 2580 tracktype tracks; 2581 2582 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n"); 2583 2584 cdrom_count_tracks(cdi, &tracks); 2585 if (tracks.error) 2586 return tracks.error; 2587 2588 /* Policy mode on */ 2589 if (tracks.audio > 0) { 2590 if (!tracks.data && !tracks.cdi && !tracks.xa) 2591 return CDS_AUDIO; 2592 else 2593 return CDS_MIXED; 2594 } 2595 2596 if (tracks.cdi > 0) 2597 return CDS_XA_2_2; 2598 if (tracks.xa > 0) 2599 return CDS_XA_2_1; 2600 if (tracks.data > 0) 2601 return CDS_DATA_1; 2602 /* Policy mode off */ 2603 2604 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n"); 2605 return CDS_NO_INFO; 2606 } 2607 2608 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi) 2609 { 2610 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n"); 2611 return cdi->capacity; 2612 } 2613 2614 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi, 2615 void __user *argp) 2616 { 2617 struct cdrom_subchnl q; 2618 u8 requested, back; 2619 int ret; 2620 2621 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/ 2622 2623 if (copy_from_user(&q, argp, sizeof(q))) 2624 return -EFAULT; 2625 2626 requested = q.cdsc_format; 2627 if (requested != CDROM_MSF && requested != CDROM_LBA) 2628 return -EINVAL; 2629 q.cdsc_format = CDROM_MSF; 2630 2631 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q); 2632 if (ret) 2633 return ret; 2634 2635 back = q.cdsc_format; /* local copy */ 2636 sanitize_format(&q.cdsc_absaddr, &back, requested); 2637 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2638 2639 if (copy_to_user(argp, &q, sizeof(q))) 2640 return -EFAULT; 2641 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2642 return 0; 2643 } 2644 2645 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 2646 void __user *argp) 2647 { 2648 struct cdrom_tochdr header; 2649 int ret; 2650 2651 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */ 2652 2653 if (copy_from_user(&header, argp, sizeof(header))) 2654 return -EFAULT; 2655 2656 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 2657 if (ret) 2658 return ret; 2659 2660 if (copy_to_user(argp, &header, sizeof(header))) 2661 return -EFAULT; 2662 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */ 2663 return 0; 2664 } 2665 2666 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi, 2667 void __user *argp) 2668 { 2669 struct cdrom_tocentry entry; 2670 u8 requested_format; 2671 int ret; 2672 2673 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */ 2674 2675 if (copy_from_user(&entry, argp, sizeof(entry))) 2676 return -EFAULT; 2677 2678 requested_format = entry.cdte_format; 2679 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2680 return -EINVAL; 2681 /* make interface to low-level uniform */ 2682 entry.cdte_format = CDROM_MSF; 2683 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry); 2684 if (ret) 2685 return ret; 2686 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format); 2687 2688 if (copy_to_user(argp, &entry, sizeof(entry))) 2689 return -EFAULT; 2690 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */ 2691 return 0; 2692 } 2693 2694 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi, 2695 void __user *argp) 2696 { 2697 struct cdrom_msf msf; 2698 2699 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2700 2701 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2702 return -ENOSYS; 2703 if (copy_from_user(&msf, argp, sizeof(msf))) 2704 return -EFAULT; 2705 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf); 2706 } 2707 2708 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi, 2709 void __user *argp) 2710 { 2711 struct cdrom_ti ti; 2712 int ret; 2713 2714 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n"); 2715 2716 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2717 return -ENOSYS; 2718 if (copy_from_user(&ti, argp, sizeof(ti))) 2719 return -EFAULT; 2720 2721 ret = check_for_audio_disc(cdi, cdi->ops); 2722 if (ret) 2723 return ret; 2724 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti); 2725 } 2726 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi, 2727 void __user *argp) 2728 { 2729 struct cdrom_volctrl volume; 2730 2731 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n"); 2732 2733 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2734 return -ENOSYS; 2735 if (copy_from_user(&volume, argp, sizeof(volume))) 2736 return -EFAULT; 2737 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume); 2738 } 2739 2740 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi, 2741 void __user *argp) 2742 { 2743 struct cdrom_volctrl volume; 2744 int ret; 2745 2746 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n"); 2747 2748 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2749 return -ENOSYS; 2750 2751 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume); 2752 if (ret) 2753 return ret; 2754 2755 if (copy_to_user(argp, &volume, sizeof(volume))) 2756 return -EFAULT; 2757 return 0; 2758 } 2759 2760 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi, 2761 unsigned int cmd) 2762 { 2763 int ret; 2764 2765 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n"); 2766 2767 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2768 return -ENOSYS; 2769 ret = check_for_audio_disc(cdi, cdi->ops); 2770 if (ret) 2771 return ret; 2772 return cdi->ops->audio_ioctl(cdi, cmd, NULL); 2773 } 2774 2775 /* 2776 * Required when we need to use READ_10 to issue other than 2048 block 2777 * reads 2778 */ 2779 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size) 2780 { 2781 const struct cdrom_device_ops *cdo = cdi->ops; 2782 struct packet_command cgc; 2783 struct modesel_head mh; 2784 2785 memset(&mh, 0, sizeof(mh)); 2786 mh.block_desc_length = 0x08; 2787 mh.block_length_med = (size >> 8) & 0xff; 2788 mh.block_length_lo = size & 0xff; 2789 2790 memset(&cgc, 0, sizeof(cgc)); 2791 cgc.cmd[0] = 0x15; 2792 cgc.cmd[1] = 1 << 4; 2793 cgc.cmd[4] = 12; 2794 cgc.buflen = sizeof(mh); 2795 cgc.buffer = (char *) &mh; 2796 cgc.data_direction = CGC_DATA_WRITE; 2797 mh.block_desc_length = 0x08; 2798 mh.block_length_med = (size >> 8) & 0xff; 2799 mh.block_length_lo = size & 0xff; 2800 2801 return cdo->generic_packet(cdi, &cgc); 2802 } 2803 2804 static int cdrom_get_track_info(struct cdrom_device_info *cdi, 2805 __u16 track, __u8 type, track_information *ti) 2806 { 2807 const struct cdrom_device_ops *cdo = cdi->ops; 2808 struct packet_command cgc; 2809 int ret, buflen; 2810 2811 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ); 2812 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO; 2813 cgc.cmd[1] = type & 3; 2814 cgc.cmd[4] = (track & 0xff00) >> 8; 2815 cgc.cmd[5] = track & 0xff; 2816 cgc.cmd[8] = 8; 2817 cgc.quiet = 1; 2818 2819 ret = cdo->generic_packet(cdi, &cgc); 2820 if (ret) 2821 return ret; 2822 2823 buflen = be16_to_cpu(ti->track_information_length) + 2824 sizeof(ti->track_information_length); 2825 2826 if (buflen > sizeof(track_information)) 2827 buflen = sizeof(track_information); 2828 2829 cgc.cmd[8] = cgc.buflen = buflen; 2830 ret = cdo->generic_packet(cdi, &cgc); 2831 if (ret) 2832 return ret; 2833 2834 /* return actual fill size */ 2835 return buflen; 2836 } 2837 2838 /* return the last written block on the CD-R media. this is for the udf 2839 file system. */ 2840 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) 2841 { 2842 struct cdrom_tocentry toc; 2843 disc_information di; 2844 track_information ti; 2845 __u32 last_track; 2846 int ret = -1, ti_size; 2847 2848 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 2849 goto use_toc; 2850 2851 ret = cdrom_get_disc_info(cdi, &di); 2852 if (ret < (int)(offsetof(typeof(di), last_track_lsb) 2853 + sizeof(di.last_track_lsb))) 2854 goto use_toc; 2855 2856 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 2857 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 2858 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2859 if (ti_size < (int)offsetof(typeof(ti), track_start)) 2860 goto use_toc; 2861 2862 /* if this track is blank, try the previous. */ 2863 if (ti.blank) { 2864 if (last_track == 1) 2865 goto use_toc; 2866 last_track--; 2867 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2868 } 2869 2870 if (ti_size < (int)(offsetof(typeof(ti), track_size) 2871 + sizeof(ti.track_size))) 2872 goto use_toc; 2873 2874 /* if last recorded field is valid, return it. */ 2875 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address) 2876 + sizeof(ti.last_rec_address))) { 2877 *last_written = be32_to_cpu(ti.last_rec_address); 2878 } else { 2879 /* make it up instead */ 2880 *last_written = be32_to_cpu(ti.track_start) + 2881 be32_to_cpu(ti.track_size); 2882 if (ti.free_blocks) 2883 *last_written -= (be32_to_cpu(ti.free_blocks) + 7); 2884 } 2885 return 0; 2886 2887 /* this is where we end up if the drive either can't do a 2888 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if 2889 it doesn't give enough information or fails. then we return 2890 the toc contents. */ 2891 use_toc: 2892 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2893 return -ENOSYS; 2894 2895 toc.cdte_format = CDROM_MSF; 2896 toc.cdte_track = CDROM_LEADOUT; 2897 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) 2898 return ret; 2899 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA); 2900 *last_written = toc.cdte_addr.lba; 2901 return 0; 2902 } 2903 2904 /* return the next writable block. also for udf file system. */ 2905 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, 2906 long *next_writable) 2907 { 2908 disc_information di; 2909 track_information ti; 2910 __u16 last_track; 2911 int ret, ti_size; 2912 2913 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 2914 goto use_last_written; 2915 2916 ret = cdrom_get_disc_info(cdi, &di); 2917 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb) 2918 + sizeof(di.last_track_lsb)) 2919 goto use_last_written; 2920 2921 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 2922 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 2923 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2924 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start)) 2925 goto use_last_written; 2926 2927 /* if this track is blank, try the previous. */ 2928 if (ti.blank) { 2929 if (last_track == 1) 2930 goto use_last_written; 2931 last_track--; 2932 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2933 if (ti_size < 0) 2934 goto use_last_written; 2935 } 2936 2937 /* if next recordable address field is valid, use it. */ 2938 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable) 2939 + sizeof(ti.next_writable)) { 2940 *next_writable = be32_to_cpu(ti.next_writable); 2941 return 0; 2942 } 2943 2944 use_last_written: 2945 ret = cdrom_get_last_written(cdi, next_writable); 2946 if (ret) { 2947 *next_writable = 0; 2948 return ret; 2949 } else { 2950 *next_writable += 7; 2951 return 0; 2952 } 2953 } 2954 2955 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi, 2956 void __user *arg, 2957 struct packet_command *cgc, 2958 int cmd) 2959 { 2960 struct scsi_sense_hdr sshdr; 2961 struct cdrom_msf msf; 2962 int blocksize = 0, format = 0, lba; 2963 int ret; 2964 2965 switch (cmd) { 2966 case CDROMREADRAW: 2967 blocksize = CD_FRAMESIZE_RAW; 2968 break; 2969 case CDROMREADMODE1: 2970 blocksize = CD_FRAMESIZE; 2971 format = 2; 2972 break; 2973 case CDROMREADMODE2: 2974 blocksize = CD_FRAMESIZE_RAW0; 2975 break; 2976 } 2977 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf))) 2978 return -EFAULT; 2979 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0); 2980 /* FIXME: we need upper bound checking, too!! */ 2981 if (lba < 0) 2982 return -EINVAL; 2983 2984 cgc->buffer = kzalloc(blocksize, GFP_KERNEL); 2985 if (cgc->buffer == NULL) 2986 return -ENOMEM; 2987 2988 memset(&sshdr, 0, sizeof(sshdr)); 2989 cgc->sshdr = &sshdr; 2990 cgc->data_direction = CGC_DATA_READ; 2991 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize); 2992 if (ret && sshdr.sense_key == 0x05 && 2993 sshdr.asc == 0x20 && 2994 sshdr.ascq == 0x00) { 2995 /* 2996 * SCSI-II devices are not required to support 2997 * READ_CD, so let's try switching block size 2998 */ 2999 /* FIXME: switch back again... */ 3000 ret = cdrom_switch_blocksize(cdi, blocksize); 3001 if (ret) 3002 goto out; 3003 cgc->sshdr = NULL; 3004 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1); 3005 ret |= cdrom_switch_blocksize(cdi, blocksize); 3006 } 3007 if (!ret && copy_to_user(arg, cgc->buffer, blocksize)) 3008 ret = -EFAULT; 3009 out: 3010 kfree(cgc->buffer); 3011 return ret; 3012 } 3013 3014 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi, 3015 void __user *arg) 3016 { 3017 struct cdrom_read_audio ra; 3018 int lba; 3019 3020 #ifdef CONFIG_COMPAT 3021 if (in_compat_syscall()) { 3022 struct compat_cdrom_read_audio { 3023 union cdrom_addr addr; 3024 u8 addr_format; 3025 compat_int_t nframes; 3026 compat_caddr_t buf; 3027 } ra32; 3028 3029 if (copy_from_user(&ra32, arg, sizeof(ra32))) 3030 return -EFAULT; 3031 3032 ra = (struct cdrom_read_audio) { 3033 .addr = ra32.addr, 3034 .addr_format = ra32.addr_format, 3035 .nframes = ra32.nframes, 3036 .buf = compat_ptr(ra32.buf), 3037 }; 3038 } else 3039 #endif 3040 { 3041 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg, 3042 sizeof(ra))) 3043 return -EFAULT; 3044 } 3045 3046 if (ra.addr_format == CDROM_MSF) 3047 lba = msf_to_lba(ra.addr.msf.minute, 3048 ra.addr.msf.second, 3049 ra.addr.msf.frame); 3050 else if (ra.addr_format == CDROM_LBA) 3051 lba = ra.addr.lba; 3052 else 3053 return -EINVAL; 3054 3055 /* FIXME: we need upper bound checking, too!! */ 3056 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES) 3057 return -EINVAL; 3058 3059 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes); 3060 } 3061 3062 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi, 3063 void __user *arg) 3064 { 3065 int ret; 3066 struct cdrom_subchnl q; 3067 u_char requested, back; 3068 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q))) 3069 return -EFAULT; 3070 requested = q.cdsc_format; 3071 if (!((requested == CDROM_MSF) || 3072 (requested == CDROM_LBA))) 3073 return -EINVAL; 3074 3075 ret = cdrom_read_subchannel(cdi, &q, 0); 3076 if (ret) 3077 return ret; 3078 back = q.cdsc_format; /* local copy */ 3079 sanitize_format(&q.cdsc_absaddr, &back, requested); 3080 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 3081 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q))) 3082 return -EFAULT; 3083 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 3084 return 0; 3085 } 3086 3087 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi, 3088 void __user *arg, 3089 struct packet_command *cgc) 3090 { 3091 const struct cdrom_device_ops *cdo = cdi->ops; 3092 struct cdrom_msf msf; 3093 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 3094 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf))) 3095 return -EFAULT; 3096 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF; 3097 cgc->cmd[3] = msf.cdmsf_min0; 3098 cgc->cmd[4] = msf.cdmsf_sec0; 3099 cgc->cmd[5] = msf.cdmsf_frame0; 3100 cgc->cmd[6] = msf.cdmsf_min1; 3101 cgc->cmd[7] = msf.cdmsf_sec1; 3102 cgc->cmd[8] = msf.cdmsf_frame1; 3103 cgc->data_direction = CGC_DATA_NONE; 3104 return cdo->generic_packet(cdi, cgc); 3105 } 3106 3107 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi, 3108 void __user *arg, 3109 struct packet_command *cgc) 3110 { 3111 const struct cdrom_device_ops *cdo = cdi->ops; 3112 struct cdrom_blk blk; 3113 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n"); 3114 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk))) 3115 return -EFAULT; 3116 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10; 3117 cgc->cmd[2] = (blk.from >> 24) & 0xff; 3118 cgc->cmd[3] = (blk.from >> 16) & 0xff; 3119 cgc->cmd[4] = (blk.from >> 8) & 0xff; 3120 cgc->cmd[5] = blk.from & 0xff; 3121 cgc->cmd[7] = (blk.len >> 8) & 0xff; 3122 cgc->cmd[8] = blk.len & 0xff; 3123 cgc->data_direction = CGC_DATA_NONE; 3124 return cdo->generic_packet(cdi, cgc); 3125 } 3126 3127 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi, 3128 void __user *arg, 3129 struct packet_command *cgc, 3130 unsigned int cmd) 3131 { 3132 struct cdrom_volctrl volctrl; 3133 unsigned char buffer[32]; 3134 char mask[sizeof(buffer)]; 3135 unsigned short offset; 3136 int ret; 3137 3138 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n"); 3139 3140 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg, 3141 sizeof(volctrl))) 3142 return -EFAULT; 3143 3144 cgc->buffer = buffer; 3145 cgc->buflen = 24; 3146 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0); 3147 if (ret) 3148 return ret; 3149 3150 /* originally the code depended on buffer[1] to determine 3151 how much data is available for transfer. buffer[1] is 3152 unfortunately ambigious and the only reliable way seem 3153 to be to simply skip over the block descriptor... */ 3154 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6)); 3155 3156 if (offset + 16 > sizeof(buffer)) 3157 return -E2BIG; 3158 3159 if (offset + 16 > cgc->buflen) { 3160 cgc->buflen = offset + 16; 3161 ret = cdrom_mode_sense(cdi, cgc, 3162 GPMODE_AUDIO_CTL_PAGE, 0); 3163 if (ret) 3164 return ret; 3165 } 3166 3167 /* sanity check */ 3168 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE || 3169 buffer[offset + 1] < 14) 3170 return -EINVAL; 3171 3172 /* now we have the current volume settings. if it was only 3173 a CDROMVOLREAD, return these values */ 3174 if (cmd == CDROMVOLREAD) { 3175 volctrl.channel0 = buffer[offset+9]; 3176 volctrl.channel1 = buffer[offset+11]; 3177 volctrl.channel2 = buffer[offset+13]; 3178 volctrl.channel3 = buffer[offset+15]; 3179 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl, 3180 sizeof(volctrl))) 3181 return -EFAULT; 3182 return 0; 3183 } 3184 3185 /* get the volume mask */ 3186 cgc->buffer = mask; 3187 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1); 3188 if (ret) 3189 return ret; 3190 3191 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9]; 3192 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11]; 3193 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13]; 3194 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15]; 3195 3196 /* set volume */ 3197 cgc->buffer = buffer + offset - 8; 3198 memset(cgc->buffer, 0, 8); 3199 return cdrom_mode_select(cdi, cgc); 3200 } 3201 3202 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi, 3203 struct packet_command *cgc, 3204 int cmd) 3205 { 3206 const struct cdrom_device_ops *cdo = cdi->ops; 3207 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n"); 3208 cgc->cmd[0] = GPCMD_START_STOP_UNIT; 3209 cgc->cmd[1] = 1; 3210 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0; 3211 cgc->data_direction = CGC_DATA_NONE; 3212 return cdo->generic_packet(cdi, cgc); 3213 } 3214 3215 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi, 3216 struct packet_command *cgc, 3217 int cmd) 3218 { 3219 const struct cdrom_device_ops *cdo = cdi->ops; 3220 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n"); 3221 cgc->cmd[0] = GPCMD_PAUSE_RESUME; 3222 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0; 3223 cgc->data_direction = CGC_DATA_NONE; 3224 return cdo->generic_packet(cdi, cgc); 3225 } 3226 3227 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi, 3228 void __user *arg, 3229 struct packet_command *cgc) 3230 { 3231 int ret; 3232 dvd_struct *s; 3233 int size = sizeof(dvd_struct); 3234 3235 if (!CDROM_CAN(CDC_DVD)) 3236 return -ENOSYS; 3237 3238 s = memdup_user(arg, size); 3239 if (IS_ERR(s)) 3240 return PTR_ERR(s); 3241 3242 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 3243 3244 ret = dvd_read_struct(cdi, s, cgc); 3245 if (ret) 3246 goto out; 3247 3248 if (copy_to_user(arg, s, size)) 3249 ret = -EFAULT; 3250 out: 3251 kfree(s); 3252 return ret; 3253 } 3254 3255 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi, 3256 void __user *arg) 3257 { 3258 int ret; 3259 dvd_authinfo ai; 3260 if (!CDROM_CAN(CDC_DVD)) 3261 return -ENOSYS; 3262 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n"); 3263 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai))) 3264 return -EFAULT; 3265 ret = dvd_do_auth(cdi, &ai); 3266 if (ret) 3267 return ret; 3268 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai))) 3269 return -EFAULT; 3270 return 0; 3271 } 3272 3273 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi, 3274 void __user *arg) 3275 { 3276 int ret; 3277 long next = 0; 3278 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 3279 ret = cdrom_get_next_writable(cdi, &next); 3280 if (ret) 3281 return ret; 3282 if (copy_to_user((long __user *)arg, &next, sizeof(next))) 3283 return -EFAULT; 3284 return 0; 3285 } 3286 3287 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi, 3288 void __user *arg) 3289 { 3290 int ret; 3291 long last = 0; 3292 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 3293 ret = cdrom_get_last_written(cdi, &last); 3294 if (ret) 3295 return ret; 3296 if (in_compat_syscall()) 3297 return put_user(last, (__s32 __user *)arg); 3298 3299 return put_user(last, (long __user *)arg); 3300 } 3301 3302 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 3303 unsigned long arg) 3304 { 3305 struct packet_command cgc; 3306 void __user *userptr = (void __user *)arg; 3307 3308 memset(&cgc, 0, sizeof(cgc)); 3309 3310 /* build a unified command and queue it through 3311 cdo->generic_packet() */ 3312 switch (cmd) { 3313 case CDROMREADRAW: 3314 case CDROMREADMODE1: 3315 case CDROMREADMODE2: 3316 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd); 3317 case CDROMREADAUDIO: 3318 return mmc_ioctl_cdrom_read_audio(cdi, userptr); 3319 case CDROMSUBCHNL: 3320 return mmc_ioctl_cdrom_subchannel(cdi, userptr); 3321 case CDROMPLAYMSF: 3322 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc); 3323 case CDROMPLAYBLK: 3324 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc); 3325 case CDROMVOLCTRL: 3326 case CDROMVOLREAD: 3327 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd); 3328 case CDROMSTART: 3329 case CDROMSTOP: 3330 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd); 3331 case CDROMPAUSE: 3332 case CDROMRESUME: 3333 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd); 3334 case DVD_READ_STRUCT: 3335 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc); 3336 case DVD_AUTH: 3337 return mmc_ioctl_dvd_auth(cdi, userptr); 3338 case CDROM_NEXT_WRITABLE: 3339 return mmc_ioctl_cdrom_next_writable(cdi, userptr); 3340 case CDROM_LAST_WRITTEN: 3341 return mmc_ioctl_cdrom_last_written(cdi, userptr); 3342 } 3343 3344 return -ENOTTY; 3345 } 3346 3347 /* 3348 * Just about every imaginable ioctl is supported in the Uniform layer 3349 * these days. 3350 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl(). 3351 */ 3352 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, 3353 fmode_t mode, unsigned int cmd, unsigned long arg) 3354 { 3355 void __user *argp = (void __user *)arg; 3356 int ret; 3357 3358 /* 3359 * Try the generic SCSI command ioctl's first. 3360 */ 3361 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp); 3362 if (ret != -ENOTTY) 3363 return ret; 3364 3365 switch (cmd) { 3366 case CDROMMULTISESSION: 3367 return cdrom_ioctl_multisession(cdi, argp); 3368 case CDROMEJECT: 3369 return cdrom_ioctl_eject(cdi); 3370 case CDROMCLOSETRAY: 3371 return cdrom_ioctl_closetray(cdi); 3372 case CDROMEJECT_SW: 3373 return cdrom_ioctl_eject_sw(cdi, arg); 3374 case CDROM_MEDIA_CHANGED: 3375 return cdrom_ioctl_media_changed(cdi, arg); 3376 case CDROM_SET_OPTIONS: 3377 return cdrom_ioctl_set_options(cdi, arg); 3378 case CDROM_CLEAR_OPTIONS: 3379 return cdrom_ioctl_clear_options(cdi, arg); 3380 case CDROM_SELECT_SPEED: 3381 return cdrom_ioctl_select_speed(cdi, arg); 3382 case CDROM_SELECT_DISC: 3383 return cdrom_ioctl_select_disc(cdi, arg); 3384 case CDROMRESET: 3385 return cdrom_ioctl_reset(cdi, bdev); 3386 case CDROM_LOCKDOOR: 3387 return cdrom_ioctl_lock_door(cdi, arg); 3388 case CDROM_DEBUG: 3389 return cdrom_ioctl_debug(cdi, arg); 3390 case CDROM_GET_CAPABILITY: 3391 return cdrom_ioctl_get_capability(cdi); 3392 case CDROM_GET_MCN: 3393 return cdrom_ioctl_get_mcn(cdi, argp); 3394 case CDROM_DRIVE_STATUS: 3395 return cdrom_ioctl_drive_status(cdi, arg); 3396 case CDROM_DISC_STATUS: 3397 return cdrom_ioctl_disc_status(cdi); 3398 case CDROM_CHANGER_NSLOTS: 3399 return cdrom_ioctl_changer_nslots(cdi); 3400 } 3401 3402 /* 3403 * Use the ioctls that are implemented through the generic_packet() 3404 * interface. this may look at bit funny, but if -ENOTTY is 3405 * returned that particular ioctl is not implemented and we 3406 * let it go through the device specific ones. 3407 */ 3408 if (CDROM_CAN(CDC_GENERIC_PACKET)) { 3409 ret = mmc_ioctl(cdi, cmd, arg); 3410 if (ret != -ENOTTY) 3411 return ret; 3412 } 3413 3414 /* 3415 * Note: most of the cd_dbg() calls are commented out here, 3416 * because they fill up the sys log when CD players poll 3417 * the drive. 3418 */ 3419 switch (cmd) { 3420 case CDROMSUBCHNL: 3421 return cdrom_ioctl_get_subchnl(cdi, argp); 3422 case CDROMREADTOCHDR: 3423 return cdrom_ioctl_read_tochdr(cdi, argp); 3424 case CDROMREADTOCENTRY: 3425 return cdrom_ioctl_read_tocentry(cdi, argp); 3426 case CDROMPLAYMSF: 3427 return cdrom_ioctl_play_msf(cdi, argp); 3428 case CDROMPLAYTRKIND: 3429 return cdrom_ioctl_play_trkind(cdi, argp); 3430 case CDROMVOLCTRL: 3431 return cdrom_ioctl_volctrl(cdi, argp); 3432 case CDROMVOLREAD: 3433 return cdrom_ioctl_volread(cdi, argp); 3434 case CDROMSTART: 3435 case CDROMSTOP: 3436 case CDROMPAUSE: 3437 case CDROMRESUME: 3438 return cdrom_ioctl_audioctl(cdi, cmd); 3439 } 3440 3441 return -ENOSYS; 3442 } 3443 3444 EXPORT_SYMBOL(cdrom_get_last_written); 3445 EXPORT_SYMBOL(register_cdrom); 3446 EXPORT_SYMBOL(unregister_cdrom); 3447 EXPORT_SYMBOL(cdrom_open); 3448 EXPORT_SYMBOL(cdrom_release); 3449 EXPORT_SYMBOL(cdrom_ioctl); 3450 EXPORT_SYMBOL(cdrom_media_changed); 3451 EXPORT_SYMBOL(cdrom_number_of_slots); 3452 EXPORT_SYMBOL(cdrom_mode_select); 3453 EXPORT_SYMBOL(cdrom_mode_sense); 3454 EXPORT_SYMBOL(init_cdrom_command); 3455 EXPORT_SYMBOL(cdrom_get_media_event); 3456 3457 #ifdef CONFIG_SYSCTL 3458 3459 #define CDROM_STR_SIZE 1000 3460 3461 static struct cdrom_sysctl_settings { 3462 char info[CDROM_STR_SIZE]; /* general info */ 3463 int autoclose; /* close tray upon mount, etc */ 3464 int autoeject; /* eject on umount */ 3465 int debug; /* turn on debugging messages */ 3466 int lock; /* lock the door on device open */ 3467 int check; /* check media type */ 3468 } cdrom_sysctl_settings; 3469 3470 enum cdrom_print_option { 3471 CTL_NAME, 3472 CTL_SPEED, 3473 CTL_SLOTS, 3474 CTL_CAPABILITY 3475 }; 3476 3477 static int cdrom_print_info(const char *header, int val, char *info, 3478 int *pos, enum cdrom_print_option option) 3479 { 3480 const int max_size = sizeof(cdrom_sysctl_settings.info); 3481 struct cdrom_device_info *cdi; 3482 int ret; 3483 3484 ret = scnprintf(info + *pos, max_size - *pos, header); 3485 if (!ret) 3486 return 1; 3487 3488 *pos += ret; 3489 3490 list_for_each_entry(cdi, &cdrom_list, list) { 3491 switch (option) { 3492 case CTL_NAME: 3493 ret = scnprintf(info + *pos, max_size - *pos, 3494 "\t%s", cdi->name); 3495 break; 3496 case CTL_SPEED: 3497 ret = scnprintf(info + *pos, max_size - *pos, 3498 "\t%d", cdi->speed); 3499 break; 3500 case CTL_SLOTS: 3501 ret = scnprintf(info + *pos, max_size - *pos, 3502 "\t%d", cdi->capacity); 3503 break; 3504 case CTL_CAPABILITY: 3505 ret = scnprintf(info + *pos, max_size - *pos, 3506 "\t%d", CDROM_CAN(val) != 0); 3507 break; 3508 default: 3509 pr_info("invalid option%d\n", option); 3510 return 1; 3511 } 3512 if (!ret) 3513 return 1; 3514 *pos += ret; 3515 } 3516 3517 return 0; 3518 } 3519 3520 static int cdrom_sysctl_info(struct ctl_table *ctl, int write, 3521 void __user *buffer, size_t *lenp, loff_t *ppos) 3522 { 3523 int pos; 3524 char *info = cdrom_sysctl_settings.info; 3525 const int max_size = sizeof(cdrom_sysctl_settings.info); 3526 3527 if (!*lenp || (*ppos && !write)) { 3528 *lenp = 0; 3529 return 0; 3530 } 3531 3532 mutex_lock(&cdrom_mutex); 3533 3534 pos = sprintf(info, "CD-ROM information, " VERSION "\n"); 3535 3536 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME)) 3537 goto done; 3538 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED)) 3539 goto done; 3540 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS)) 3541 goto done; 3542 if (cdrom_print_info("\nCan close tray:\t", 3543 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY)) 3544 goto done; 3545 if (cdrom_print_info("\nCan open tray:\t", 3546 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY)) 3547 goto done; 3548 if (cdrom_print_info("\nCan lock tray:\t", 3549 CDC_LOCK, info, &pos, CTL_CAPABILITY)) 3550 goto done; 3551 if (cdrom_print_info("\nCan change speed:", 3552 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY)) 3553 goto done; 3554 if (cdrom_print_info("\nCan select disk:", 3555 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY)) 3556 goto done; 3557 if (cdrom_print_info("\nCan read multisession:", 3558 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY)) 3559 goto done; 3560 if (cdrom_print_info("\nCan read MCN:\t", 3561 CDC_MCN, info, &pos, CTL_CAPABILITY)) 3562 goto done; 3563 if (cdrom_print_info("\nReports media changed:", 3564 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY)) 3565 goto done; 3566 if (cdrom_print_info("\nCan play audio:\t", 3567 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY)) 3568 goto done; 3569 if (cdrom_print_info("\nCan write CD-R:\t", 3570 CDC_CD_R, info, &pos, CTL_CAPABILITY)) 3571 goto done; 3572 if (cdrom_print_info("\nCan write CD-RW:", 3573 CDC_CD_RW, info, &pos, CTL_CAPABILITY)) 3574 goto done; 3575 if (cdrom_print_info("\nCan read DVD:\t", 3576 CDC_DVD, info, &pos, CTL_CAPABILITY)) 3577 goto done; 3578 if (cdrom_print_info("\nCan write DVD-R:", 3579 CDC_DVD_R, info, &pos, CTL_CAPABILITY)) 3580 goto done; 3581 if (cdrom_print_info("\nCan write DVD-RAM:", 3582 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY)) 3583 goto done; 3584 if (cdrom_print_info("\nCan read MRW:\t", 3585 CDC_MRW, info, &pos, CTL_CAPABILITY)) 3586 goto done; 3587 if (cdrom_print_info("\nCan write MRW:\t", 3588 CDC_MRW_W, info, &pos, CTL_CAPABILITY)) 3589 goto done; 3590 if (cdrom_print_info("\nCan write RAM:\t", 3591 CDC_RAM, info, &pos, CTL_CAPABILITY)) 3592 goto done; 3593 if (!scnprintf(info + pos, max_size - pos, "\n\n")) 3594 goto done; 3595 doit: 3596 mutex_unlock(&cdrom_mutex); 3597 return proc_dostring(ctl, write, buffer, lenp, ppos); 3598 done: 3599 pr_info("info buffer too small\n"); 3600 goto doit; 3601 } 3602 3603 /* Unfortunately, per device settings are not implemented through 3604 procfs/sysctl yet. When they are, this will naturally disappear. For now 3605 just update all drives. Later this will become the template on which 3606 new registered drives will be based. */ 3607 static void cdrom_update_settings(void) 3608 { 3609 struct cdrom_device_info *cdi; 3610 3611 mutex_lock(&cdrom_mutex); 3612 list_for_each_entry(cdi, &cdrom_list, list) { 3613 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) 3614 cdi->options |= CDO_AUTO_CLOSE; 3615 else if (!autoclose) 3616 cdi->options &= ~CDO_AUTO_CLOSE; 3617 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY)) 3618 cdi->options |= CDO_AUTO_EJECT; 3619 else if (!autoeject) 3620 cdi->options &= ~CDO_AUTO_EJECT; 3621 if (lockdoor && CDROM_CAN(CDC_LOCK)) 3622 cdi->options |= CDO_LOCK; 3623 else if (!lockdoor) 3624 cdi->options &= ~CDO_LOCK; 3625 if (check_media_type) 3626 cdi->options |= CDO_CHECK_TYPE; 3627 else 3628 cdi->options &= ~CDO_CHECK_TYPE; 3629 } 3630 mutex_unlock(&cdrom_mutex); 3631 } 3632 3633 static int cdrom_sysctl_handler(struct ctl_table *ctl, int write, 3634 void __user *buffer, size_t *lenp, loff_t *ppos) 3635 { 3636 int ret; 3637 3638 ret = proc_dointvec(ctl, write, buffer, lenp, ppos); 3639 3640 if (write) { 3641 3642 /* we only care for 1 or 0. */ 3643 autoclose = !!cdrom_sysctl_settings.autoclose; 3644 autoeject = !!cdrom_sysctl_settings.autoeject; 3645 debug = !!cdrom_sysctl_settings.debug; 3646 lockdoor = !!cdrom_sysctl_settings.lock; 3647 check_media_type = !!cdrom_sysctl_settings.check; 3648 3649 /* update the option flags according to the changes. we 3650 don't have per device options through sysctl yet, 3651 but we will have and then this will disappear. */ 3652 cdrom_update_settings(); 3653 } 3654 3655 return ret; 3656 } 3657 3658 /* Place files in /proc/sys/dev/cdrom */ 3659 static struct ctl_table cdrom_table[] = { 3660 { 3661 .procname = "info", 3662 .data = &cdrom_sysctl_settings.info, 3663 .maxlen = CDROM_STR_SIZE, 3664 .mode = 0444, 3665 .proc_handler = cdrom_sysctl_info, 3666 }, 3667 { 3668 .procname = "autoclose", 3669 .data = &cdrom_sysctl_settings.autoclose, 3670 .maxlen = sizeof(int), 3671 .mode = 0644, 3672 .proc_handler = cdrom_sysctl_handler, 3673 }, 3674 { 3675 .procname = "autoeject", 3676 .data = &cdrom_sysctl_settings.autoeject, 3677 .maxlen = sizeof(int), 3678 .mode = 0644, 3679 .proc_handler = cdrom_sysctl_handler, 3680 }, 3681 { 3682 .procname = "debug", 3683 .data = &cdrom_sysctl_settings.debug, 3684 .maxlen = sizeof(int), 3685 .mode = 0644, 3686 .proc_handler = cdrom_sysctl_handler, 3687 }, 3688 { 3689 .procname = "lock", 3690 .data = &cdrom_sysctl_settings.lock, 3691 .maxlen = sizeof(int), 3692 .mode = 0644, 3693 .proc_handler = cdrom_sysctl_handler, 3694 }, 3695 { 3696 .procname = "check_media", 3697 .data = &cdrom_sysctl_settings.check, 3698 .maxlen = sizeof(int), 3699 .mode = 0644, 3700 .proc_handler = cdrom_sysctl_handler 3701 }, 3702 { } 3703 }; 3704 3705 static struct ctl_table cdrom_cdrom_table[] = { 3706 { 3707 .procname = "cdrom", 3708 .maxlen = 0, 3709 .mode = 0555, 3710 .child = cdrom_table, 3711 }, 3712 { } 3713 }; 3714 3715 /* Make sure that /proc/sys/dev is there */ 3716 static struct ctl_table cdrom_root_table[] = { 3717 { 3718 .procname = "dev", 3719 .maxlen = 0, 3720 .mode = 0555, 3721 .child = cdrom_cdrom_table, 3722 }, 3723 { } 3724 }; 3725 static struct ctl_table_header *cdrom_sysctl_header; 3726 3727 static void cdrom_sysctl_register(void) 3728 { 3729 static atomic_t initialized = ATOMIC_INIT(0); 3730 3731 if (!atomic_add_unless(&initialized, 1, 1)) 3732 return; 3733 3734 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table); 3735 3736 /* set the defaults */ 3737 cdrom_sysctl_settings.autoclose = autoclose; 3738 cdrom_sysctl_settings.autoeject = autoeject; 3739 cdrom_sysctl_settings.debug = debug; 3740 cdrom_sysctl_settings.lock = lockdoor; 3741 cdrom_sysctl_settings.check = check_media_type; 3742 } 3743 3744 static void cdrom_sysctl_unregister(void) 3745 { 3746 if (cdrom_sysctl_header) 3747 unregister_sysctl_table(cdrom_sysctl_header); 3748 } 3749 3750 #else /* CONFIG_SYSCTL */ 3751 3752 static void cdrom_sysctl_register(void) 3753 { 3754 } 3755 3756 static void cdrom_sysctl_unregister(void) 3757 { 3758 } 3759 3760 #endif /* CONFIG_SYSCTL */ 3761 3762 static int __init cdrom_init(void) 3763 { 3764 cdrom_sysctl_register(); 3765 3766 return 0; 3767 } 3768 3769 static void __exit cdrom_exit(void) 3770 { 3771 pr_info("Uniform CD-ROM driver unloaded\n"); 3772 cdrom_sysctl_unregister(); 3773 } 3774 3775 module_init(cdrom_init); 3776 module_exit(cdrom_exit); 3777 MODULE_LICENSE("GPL"); 3778