1 /* linux/drivers/cdrom/cdrom.c 2 Copyright (c) 1996, 1997 David A. van Leeuwen. 3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org> 4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk> 5 6 May be copied or modified under the terms of the GNU General Public 7 License. See linux/COPYING for more information. 8 9 Uniform CD-ROM driver for Linux. 10 See Documentation/cdrom/cdrom-standard.tex for usage information. 11 12 The routines in the file provide a uniform interface between the 13 software that uses CD-ROMs and the various low-level drivers that 14 actually talk to the hardware. Suggestions are welcome. 15 Patches that work are more welcome though. ;-) 16 17 To Do List: 18 ---------------------------------- 19 20 -- Modify sysctl/proc interface. I plan on having one directory per 21 drive, with entries for outputing general drive information, and sysctl 22 based tunable parameters such as whether the tray should auto-close for 23 that drive. Suggestions (or patches) for this welcome! 24 25 26 Revision History 27 ---------------------------------- 28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl> 29 -- Initial version by David A. van Leeuwen. I don't have a detailed 30 changelog for the 1.x series, David? 31 32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org> 33 -- New maintainer! As David A. van Leeuwen has been too busy to actively 34 maintain and improve this driver, I am now carrying on the torch. If 35 you have a problem with this driver, please feel free to contact me. 36 37 -- Added (rudimentary) sysctl interface. I realize this is really weak 38 right now, and is _very_ badly implemented. It will be improved... 39 40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into 41 the Uniform CD-ROM driver via the cdrom_count_tracks function. 42 The cdrom_count_tracks function helps resolve some of the false 43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check 44 for the correct media type when mounting or playing audio from a CD. 45 46 -- Remove the calls to verify_area and only use the copy_from_user and 47 copy_to_user stuff, since these calls now provide their own memory 48 checking with the 2.1.x kernels. 49 50 -- Major update to return codes so that errors from low-level drivers 51 are passed on through (thanks to Gerd Knorr for pointing out this 52 problem). 53 54 -- Made it so if a function isn't implemented in a low-level driver, 55 ENOSYS is now returned instead of EINVAL. 56 57 -- Simplified some complex logic so that the source code is easier to read. 58 59 -- Other stuff I probably forgot to mention (lots of changes). 60 61 2.01 to 2.11 Dec 1997-Jan 1998 62 -- TO-DO! Write changelogs for 2.01 to 2.12. 63 64 2.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org> 65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that 66 copy_*_user does not return EFAULT on error, but instead returns the number 67 of bytes not copied. I was returning whatever non-zero stuff came back from 68 the copy_*_user functions directly, which would result in strange errors. 69 70 2.13 July 17, 1998 -- Erik Andersen <andersee@debian.org> 71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed 72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing 73 this out and providing a simple fix. 74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback. 75 thanks to Andrea Arcangeli 76 -- Fixed it so that the /proc entry now also shows up when cdrom is 77 compiled into the kernel. Before it only worked when loaded as a module. 78 79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org> 80 -- Fixed a bug in cdrom_media_changed and handling of reporting that 81 the media had changed for devices that _don't_ implement media_changed. 82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug. 83 -- Made a few things more pedanticly correct. 84 85 2.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk> 86 -- New maintainers! Erik was too busy to continue the work on the driver, 87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk> 88 will do their best to follow in his footsteps 89 90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk> 91 -- Check if drive is capable of doing what we ask before blindly changing 92 cdi->options in various ioctl. 93 -- Added version to proc entry. 94 95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk> 96 -- Fixed an error in open_for_data where we would sometimes not return 97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>. 98 -- Fixed module usage count - usage was based on /proc/sys/dev 99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other 100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where 101 dev would be removed even though it was used. cdrom.c just illuminated 102 that bug. 103 104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk> 105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has 106 been "rewritten" because capabilities and options aren't in sync. They 107 should be... 108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way. 109 -- Added CDROM_RESET ioctl. 110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly. 111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs 112 from parsing /proc/sys/dev/cdrom/info. 113 114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk> 115 -- Check capability mask from low level driver when counting tracks as 116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>. 117 118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk> 119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of 120 CDC_CLOSE_TRAY. 121 -- proc info didn't mask against capabilities mask. 122 123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk> 124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the 125 code was duplicated before. Drives that support the generic packet 126 interface are now being fed packets from here instead. 127 -- First attempt at adding support for MMC2 commands - for DVD and 128 CD-R(W) drives. Only the DVD parts are in now - the interface used is 129 the same as for the audio ioctls. 130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get 131 a change to perform device specific ioctls as well. 132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities. 133 -- Put in sysctl files for autoclose, autoeject, check_media, debug, 134 and lock. 135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about 136 CD-Rx and DVD capabilities. 137 -- Now default to checking media type. 138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for 139 doing this anyway, with the generic_packet addition. 140 141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk> 142 -- Fix up the sysctl handling so that the option flags get set 143 correctly. 144 -- Fix up ioctl handling so the device specific ones actually get 145 called :). 146 147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk> 148 -- Fixed volume control on SCSI drives (or others with longer audio 149 page). 150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath 151 <andrewtv@usa.net> for telling me and for having defined the various 152 DVD structures and ioctls in the first place! He designed the original 153 DVD patches for ide-cd and while I rearranged and unified them, the 154 interface is still the same. 155 156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk> 157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only 158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left. 159 -- Moved the CDROMREADxxx ioctls in here. 160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls 161 and exported functions. 162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands 163 to now read GPCMD_ for the new generic packet interface. All low level 164 drivers are updated as well. 165 -- Various other cleanups. 166 167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk> 168 -- Fixed a couple of possible memory leaks (if an operation failed and 169 we didn't free the buffer before returning the error). 170 -- Integrated Uniform CD Changer handling from Richard Sharman 171 <rsharman@pobox.com>. 172 -- Defined CD_DVD and CD_CHANGER log levels. 173 -- Fixed the CDROMREADxxx ioctls. 174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few 175 drives supported it. We lose the index part, however. 176 -- Small modifications to accommodate opens of /dev/hdc1, required 177 for ide-cd to handle multisession discs. 178 -- Export cdrom_mode_sense and cdrom_mode_select. 179 -- init_cdrom_command() for setting up a cgc command. 180 181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk> 182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually 183 impossible to send the drive data in a sensible way. 184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and 185 dvd_read_manufact. 186 -- Added setup of write mode for packet writing. 187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of 188 number of frames and split the reads in blocks of 8. 189 190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk> 191 -- Added support for changing the region of DVD drives. 192 -- Added sense data to generic command. 193 194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de> 195 -- Do same "read header length" trick in cdrom_get_disc_info() as 196 we do in cdrom_get_track_info() -- some drive don't obey specs and 197 fail if they can't supply the full Mt Fuji size table. 198 -- Deleted stuff related to setting up write modes. It has a different 199 home now. 200 -- Clear header length in mode_select unconditionally. 201 -- Removed the register_disk() that was added, not needed here. 202 203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de> 204 -- Fix direction flag in setup_send_key and setup_report_key. This 205 gave some SCSI adapters problems. 206 -- Always return -EROFS for write opens 207 -- Convert to module_init/module_exit style init and remove some 208 of the #ifdef MODULE stuff 209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid, 210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and 211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command 212 did not clear a 0 sized buffer. 213 214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de> 215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In 216 that case switch block size and issue plain READ_10 again, then switch 217 back. 218 219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de> 220 -- Fix volume control on CD's - old SCSI-II drives now use their own 221 code, as doing MODE6 stuff in here is really not my intention. 222 -- Use READ_DISC_INFO for more reliable end-of-disc. 223 224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de> 225 -- Fix bug in getting rpc phase 2 region info. 226 -- Reinstate "correct" CDROMPLAYTRKIND 227 228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de> 229 -- Use quiet bit on packet commands not known to work 230 231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de> 232 -- Various fixes and lots of cleanups not listed :-) 233 -- Locking fixes 234 -- Mt Rainier support 235 -- DVD-RAM write open fixes 236 237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov 238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units. 239 240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW 241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se> 242 243 -------------------------------------------------------------------------*/ 244 245 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 246 247 #define REVISION "Revision: 3.20" 248 #define VERSION "Id: cdrom.c 3.20 2003/12/17" 249 250 /* I use an error-log mask to give fine grain control over the type of 251 messages dumped to the system logs. The available masks include: */ 252 #define CD_NOTHING 0x0 253 #define CD_WARNING 0x1 254 #define CD_REG_UNREG 0x2 255 #define CD_DO_IOCTL 0x4 256 #define CD_OPEN 0x8 257 #define CD_CLOSE 0x10 258 #define CD_COUNT_TRACKS 0x20 259 #define CD_CHANGER 0x40 260 #define CD_DVD 0x80 261 262 /* Define this to remove _all_ the debugging messages */ 263 /* #define ERRLOGMASK CD_NOTHING */ 264 #define ERRLOGMASK CD_WARNING 265 /* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */ 266 /* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */ 267 268 #include <linux/module.h> 269 #include <linux/fs.h> 270 #include <linux/major.h> 271 #include <linux/types.h> 272 #include <linux/errno.h> 273 #include <linux/kernel.h> 274 #include <linux/mm.h> 275 #include <linux/slab.h> 276 #include <linux/cdrom.h> 277 #include <linux/sysctl.h> 278 #include <linux/proc_fs.h> 279 #include <linux/blkpg.h> 280 #include <linux/init.h> 281 #include <linux/fcntl.h> 282 #include <linux/blkdev.h> 283 #include <linux/times.h> 284 #include <linux/uaccess.h> 285 #include <scsi/scsi_request.h> 286 287 /* used to tell the module to turn on full debugging messages */ 288 static bool debug; 289 /* default compatibility mode */ 290 static bool autoclose=1; 291 static bool autoeject; 292 static bool lockdoor = 1; 293 /* will we ever get to use this... sigh. */ 294 static bool check_media_type; 295 /* automatically restart mrw format */ 296 static bool mrw_format_restart = 1; 297 module_param(debug, bool, 0); 298 module_param(autoclose, bool, 0); 299 module_param(autoeject, bool, 0); 300 module_param(lockdoor, bool, 0); 301 module_param(check_media_type, bool, 0); 302 module_param(mrw_format_restart, bool, 0); 303 304 static DEFINE_MUTEX(cdrom_mutex); 305 306 static const char *mrw_format_status[] = { 307 "not mrw", 308 "bgformat inactive", 309 "bgformat active", 310 "mrw complete", 311 }; 312 313 static const char *mrw_address_space[] = { "DMA", "GAA" }; 314 315 #if (ERRLOGMASK != CD_NOTHING) 316 #define cd_dbg(type, fmt, ...) \ 317 do { \ 318 if ((ERRLOGMASK & type) || debug == 1) \ 319 pr_debug(fmt, ##__VA_ARGS__); \ 320 } while (0) 321 #else 322 #define cd_dbg(type, fmt, ...) \ 323 do { \ 324 if (0 && (ERRLOGMASK & type) || debug == 1) \ 325 pr_debug(fmt, ##__VA_ARGS__); \ 326 } while (0) 327 #endif 328 329 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in 330 a lot of places. This macro makes the code more clear. */ 331 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type)) 332 333 /* 334 * Another popular OS uses 7 seconds as the hard timeout for default 335 * commands, so it is a good choice for us as well. 336 */ 337 #define CDROM_DEF_TIMEOUT (7 * HZ) 338 339 /* Not-exported routines. */ 340 341 static void cdrom_sysctl_register(void); 342 343 static LIST_HEAD(cdrom_list); 344 345 int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 346 struct packet_command *cgc) 347 { 348 if (cgc->sense) { 349 cgc->sense->sense_key = 0x05; 350 cgc->sense->asc = 0x20; 351 cgc->sense->ascq = 0x00; 352 } 353 354 cgc->stat = -EIO; 355 return -EIO; 356 } 357 EXPORT_SYMBOL(cdrom_dummy_generic_packet); 358 359 static int cdrom_flush_cache(struct cdrom_device_info *cdi) 360 { 361 struct packet_command cgc; 362 363 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 364 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 365 366 cgc.timeout = 5 * 60 * HZ; 367 368 return cdi->ops->generic_packet(cdi, &cgc); 369 } 370 371 /* requires CD R/RW */ 372 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, 373 disc_information *di) 374 { 375 const struct cdrom_device_ops *cdo = cdi->ops; 376 struct packet_command cgc; 377 int ret, buflen; 378 379 /* set up command and get the disc info */ 380 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); 381 cgc.cmd[0] = GPCMD_READ_DISC_INFO; 382 cgc.cmd[8] = cgc.buflen = 2; 383 cgc.quiet = 1; 384 385 ret = cdo->generic_packet(cdi, &cgc); 386 if (ret) 387 return ret; 388 389 /* not all drives have the same disc_info length, so requeue 390 * packet with the length the drive tells us it can supply 391 */ 392 buflen = be16_to_cpu(di->disc_information_length) + 393 sizeof(di->disc_information_length); 394 395 if (buflen > sizeof(disc_information)) 396 buflen = sizeof(disc_information); 397 398 cgc.cmd[8] = cgc.buflen = buflen; 399 ret = cdo->generic_packet(cdi, &cgc); 400 if (ret) 401 return ret; 402 403 /* return actual fill size */ 404 return buflen; 405 } 406 407 /* This macro makes sure we don't have to check on cdrom_device_ops 408 * existence in the run-time routines below. Change_capability is a 409 * hack to have the capability flags defined const, while we can still 410 * change it here without gcc complaining at every line. 411 */ 412 #define ENSURE(call, bits) \ 413 do { \ 414 if (cdo->call == NULL) \ 415 *change_capability &= ~(bits); \ 416 } while (0) 417 418 /* 419 * the first prototypes used 0x2c as the page code for the mrw mode page, 420 * subsequently this was changed to 0x03. probe the one used by this drive 421 */ 422 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi) 423 { 424 struct packet_command cgc; 425 char buffer[16]; 426 427 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 428 429 cgc.timeout = HZ; 430 cgc.quiet = 1; 431 432 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) { 433 cdi->mrw_mode_page = MRW_MODE_PC; 434 return 0; 435 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) { 436 cdi->mrw_mode_page = MRW_MODE_PC_PRE1; 437 return 0; 438 } 439 440 return 1; 441 } 442 443 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write) 444 { 445 struct packet_command cgc; 446 struct mrw_feature_desc *mfd; 447 unsigned char buffer[16]; 448 int ret; 449 450 *write = 0; 451 452 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 453 454 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 455 cgc.cmd[3] = CDF_MRW; 456 cgc.cmd[8] = sizeof(buffer); 457 cgc.quiet = 1; 458 459 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 460 return ret; 461 462 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)]; 463 if (be16_to_cpu(mfd->feature_code) != CDF_MRW) 464 return 1; 465 *write = mfd->write; 466 467 if ((ret = cdrom_mrw_probe_pc(cdi))) { 468 *write = 0; 469 return ret; 470 } 471 472 return 0; 473 } 474 475 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont) 476 { 477 struct packet_command cgc; 478 unsigned char buffer[12]; 479 int ret; 480 481 pr_info("%sstarting format\n", cont ? "Re" : ""); 482 483 /* 484 * FmtData bit set (bit 4), format type is 1 485 */ 486 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE); 487 cgc.cmd[0] = GPCMD_FORMAT_UNIT; 488 cgc.cmd[1] = (1 << 4) | 1; 489 490 cgc.timeout = 5 * 60 * HZ; 491 492 /* 493 * 4 byte format list header, 8 byte format list descriptor 494 */ 495 buffer[1] = 1 << 1; 496 buffer[3] = 8; 497 498 /* 499 * nr_blocks field 500 */ 501 buffer[4] = 0xff; 502 buffer[5] = 0xff; 503 buffer[6] = 0xff; 504 buffer[7] = 0xff; 505 506 buffer[8] = 0x24 << 2; 507 buffer[11] = cont; 508 509 ret = cdi->ops->generic_packet(cdi, &cgc); 510 if (ret) 511 pr_info("bgformat failed\n"); 512 513 return ret; 514 } 515 516 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed) 517 { 518 struct packet_command cgc; 519 520 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 521 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 522 523 /* 524 * Session = 1, Track = 0 525 */ 526 cgc.cmd[1] = !!immed; 527 cgc.cmd[2] = 1 << 1; 528 529 cgc.timeout = 5 * 60 * HZ; 530 531 return cdi->ops->generic_packet(cdi, &cgc); 532 } 533 534 static int cdrom_mrw_exit(struct cdrom_device_info *cdi) 535 { 536 disc_information di; 537 int ret; 538 539 ret = cdrom_get_disc_info(cdi, &di); 540 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type)) 541 return 1; 542 543 ret = 0; 544 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) { 545 pr_info("issuing MRW background format suspend\n"); 546 ret = cdrom_mrw_bgformat_susp(cdi, 0); 547 } 548 549 if (!ret && cdi->media_written) 550 ret = cdrom_flush_cache(cdi); 551 552 return ret; 553 } 554 555 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space) 556 { 557 struct packet_command cgc; 558 struct mode_page_header *mph; 559 char buffer[16]; 560 int ret, offset, size; 561 562 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 563 564 cgc.buffer = buffer; 565 cgc.buflen = sizeof(buffer); 566 567 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0); 568 if (ret) 569 return ret; 570 571 mph = (struct mode_page_header *)buffer; 572 offset = be16_to_cpu(mph->desc_length); 573 size = be16_to_cpu(mph->mode_data_length) + 2; 574 575 buffer[offset + 3] = space; 576 cgc.buflen = size; 577 578 ret = cdrom_mode_select(cdi, &cgc); 579 if (ret) 580 return ret; 581 582 pr_info("%s: mrw address space %s selected\n", 583 cdi->name, mrw_address_space[space]); 584 return 0; 585 } 586 587 int register_cdrom(struct cdrom_device_info *cdi) 588 { 589 static char banner_printed; 590 const struct cdrom_device_ops *cdo = cdi->ops; 591 int *change_capability = (int *)&cdo->capability; /* hack */ 592 593 cd_dbg(CD_OPEN, "entering register_cdrom\n"); 594 595 if (cdo->open == NULL || cdo->release == NULL) 596 return -EINVAL; 597 if (!banner_printed) { 598 pr_info("Uniform CD-ROM driver " REVISION "\n"); 599 banner_printed = 1; 600 cdrom_sysctl_register(); 601 } 602 603 ENSURE(drive_status, CDC_DRIVE_STATUS); 604 if (cdo->check_events == NULL && cdo->media_changed == NULL) 605 *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC); 606 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY); 607 ENSURE(lock_door, CDC_LOCK); 608 ENSURE(select_speed, CDC_SELECT_SPEED); 609 ENSURE(get_last_session, CDC_MULTI_SESSION); 610 ENSURE(get_mcn, CDC_MCN); 611 ENSURE(reset, CDC_RESET); 612 ENSURE(generic_packet, CDC_GENERIC_PACKET); 613 cdi->mc_flags = 0; 614 cdi->options = CDO_USE_FFLAGS; 615 616 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY)) 617 cdi->options |= (int) CDO_AUTO_CLOSE; 618 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY)) 619 cdi->options |= (int) CDO_AUTO_EJECT; 620 if (lockdoor == 1) 621 cdi->options |= (int) CDO_LOCK; 622 if (check_media_type == 1) 623 cdi->options |= (int) CDO_CHECK_TYPE; 624 625 if (CDROM_CAN(CDC_MRW_W)) 626 cdi->exit = cdrom_mrw_exit; 627 628 if (cdi->disk) 629 cdi->cdda_method = CDDA_BPC_FULL; 630 else 631 cdi->cdda_method = CDDA_OLD; 632 633 WARN_ON(!cdo->generic_packet); 634 635 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name); 636 mutex_lock(&cdrom_mutex); 637 list_add(&cdi->list, &cdrom_list); 638 mutex_unlock(&cdrom_mutex); 639 return 0; 640 } 641 #undef ENSURE 642 643 void unregister_cdrom(struct cdrom_device_info *cdi) 644 { 645 cd_dbg(CD_OPEN, "entering unregister_cdrom\n"); 646 647 mutex_lock(&cdrom_mutex); 648 list_del(&cdi->list); 649 mutex_unlock(&cdrom_mutex); 650 651 if (cdi->exit) 652 cdi->exit(cdi); 653 654 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name); 655 } 656 657 int cdrom_get_media_event(struct cdrom_device_info *cdi, 658 struct media_event_desc *med) 659 { 660 struct packet_command cgc; 661 unsigned char buffer[8]; 662 struct event_header *eh = (struct event_header *)buffer; 663 664 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 665 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION; 666 cgc.cmd[1] = 1; /* IMMED */ 667 cgc.cmd[4] = 1 << 4; /* media event */ 668 cgc.cmd[8] = sizeof(buffer); 669 cgc.quiet = 1; 670 671 if (cdi->ops->generic_packet(cdi, &cgc)) 672 return 1; 673 674 if (be16_to_cpu(eh->data_len) < sizeof(*med)) 675 return 1; 676 677 if (eh->nea || eh->notification_class != 0x4) 678 return 1; 679 680 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med)); 681 return 0; 682 } 683 684 static int cdrom_get_random_writable(struct cdrom_device_info *cdi, 685 struct rwrt_feature_desc *rfd) 686 { 687 struct packet_command cgc; 688 char buffer[24]; 689 int ret; 690 691 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 692 693 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */ 694 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */ 695 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */ 696 cgc.quiet = 1; 697 698 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 699 return ret; 700 701 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd)); 702 return 0; 703 } 704 705 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi) 706 { 707 struct packet_command cgc; 708 char buffer[16]; 709 __be16 *feature_code; 710 int ret; 711 712 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 713 714 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 715 cgc.cmd[3] = CDF_HWDM; 716 cgc.cmd[8] = sizeof(buffer); 717 cgc.quiet = 1; 718 719 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 720 return ret; 721 722 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)]; 723 if (be16_to_cpu(*feature_code) == CDF_HWDM) 724 return 0; 725 726 return 1; 727 } 728 729 730 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write) 731 { 732 struct rwrt_feature_desc rfd; 733 int ret; 734 735 *write = 0; 736 737 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 738 return ret; 739 740 if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 741 *write = 1; 742 743 return 0; 744 } 745 746 static int cdrom_media_erasable(struct cdrom_device_info *cdi) 747 { 748 disc_information di; 749 int ret; 750 751 ret = cdrom_get_disc_info(cdi, &di); 752 if (ret < 0 || ret < offsetof(typeof(di), n_first_track)) 753 return -1; 754 755 return di.erasable; 756 } 757 758 /* 759 * FIXME: check RO bit 760 */ 761 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi) 762 { 763 int ret = cdrom_media_erasable(cdi); 764 765 /* 766 * allow writable open if media info read worked and media is 767 * erasable, _or_ if it fails since not all drives support it 768 */ 769 if (!ret) 770 return 1; 771 772 return 0; 773 } 774 775 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi) 776 { 777 disc_information di; 778 int ret; 779 780 /* 781 * always reset to DMA lba space on open 782 */ 783 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) { 784 pr_err("failed setting lba address space\n"); 785 return 1; 786 } 787 788 ret = cdrom_get_disc_info(cdi, &di); 789 if (ret < 0 || ret < offsetof(typeof(di),disc_type)) 790 return 1; 791 792 if (!di.erasable) 793 return 1; 794 795 /* 796 * mrw_status 797 * 0 - not MRW formatted 798 * 1 - MRW bgformat started, but not running or complete 799 * 2 - MRW bgformat in progress 800 * 3 - MRW formatting complete 801 */ 802 ret = 0; 803 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]); 804 if (!di.mrw_status) 805 ret = 1; 806 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE && 807 mrw_format_restart) 808 ret = cdrom_mrw_bgformat(cdi, 1); 809 810 return ret; 811 } 812 813 static int mo_open_write(struct cdrom_device_info *cdi) 814 { 815 struct packet_command cgc; 816 char buffer[255]; 817 int ret; 818 819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ); 820 cgc.quiet = 1; 821 822 /* 823 * obtain write protect information as per 824 * drivers/scsi/sd.c:sd_read_write_protect_flag 825 */ 826 827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 828 if (ret) 829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0); 830 if (ret) { 831 cgc.buflen = 255; 832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 833 } 834 835 /* drive gave us no info, let the user go ahead */ 836 if (ret) 837 return 0; 838 839 return buffer[3] & 0x80; 840 } 841 842 static int cdrom_ram_open_write(struct cdrom_device_info *cdi) 843 { 844 struct rwrt_feature_desc rfd; 845 int ret; 846 847 if ((ret = cdrom_has_defect_mgt(cdi))) 848 return ret; 849 850 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 851 return ret; 852 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 853 ret = !rfd.curr; 854 855 cd_dbg(CD_OPEN, "can open for random write\n"); 856 return ret; 857 } 858 859 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi) 860 { 861 struct packet_command cgc; 862 char buffer[32]; 863 int ret, mmc3_profile; 864 865 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 866 867 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 868 cgc.cmd[1] = 0; 869 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */ 870 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */ 871 cgc.quiet = 1; 872 873 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 874 mmc3_profile = 0xffff; 875 else 876 mmc3_profile = (buffer[6] << 8) | buffer[7]; 877 878 cdi->mmc3_profile = mmc3_profile; 879 } 880 881 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi) 882 { 883 switch (cdi->mmc3_profile) { 884 case 0x12: /* DVD-RAM */ 885 case 0x1A: /* DVD+RW */ 886 case 0x43: /* BD-RE */ 887 return 0; 888 default: 889 return 1; 890 } 891 } 892 893 /* 894 * returns 0 for ok to open write, non-0 to disallow 895 */ 896 static int cdrom_open_write(struct cdrom_device_info *cdi) 897 { 898 int mrw, mrw_write, ram_write; 899 int ret = 1; 900 901 mrw = 0; 902 if (!cdrom_is_mrw(cdi, &mrw_write)) 903 mrw = 1; 904 905 if (CDROM_CAN(CDC_MO_DRIVE)) 906 ram_write = 1; 907 else 908 (void) cdrom_is_random_writable(cdi, &ram_write); 909 910 if (mrw) 911 cdi->mask &= ~CDC_MRW; 912 else 913 cdi->mask |= CDC_MRW; 914 915 if (mrw_write) 916 cdi->mask &= ~CDC_MRW_W; 917 else 918 cdi->mask |= CDC_MRW_W; 919 920 if (ram_write) 921 cdi->mask &= ~CDC_RAM; 922 else 923 cdi->mask |= CDC_RAM; 924 925 if (CDROM_CAN(CDC_MRW_W)) 926 ret = cdrom_mrw_open_write(cdi); 927 else if (CDROM_CAN(CDC_DVD_RAM)) 928 ret = cdrom_dvdram_open_write(cdi); 929 else if (CDROM_CAN(CDC_RAM) && 930 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE)) 931 ret = cdrom_ram_open_write(cdi); 932 else if (CDROM_CAN(CDC_MO_DRIVE)) 933 ret = mo_open_write(cdi); 934 else if (!cdrom_is_dvd_rw(cdi)) 935 ret = 0; 936 937 return ret; 938 } 939 940 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi) 941 { 942 struct packet_command cgc; 943 944 if (cdi->mmc3_profile != 0x1a) { 945 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name); 946 return; 947 } 948 949 if (!cdi->media_written) { 950 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name); 951 return; 952 } 953 954 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name); 955 956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 957 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 958 cgc.timeout = 30*HZ; 959 cdi->ops->generic_packet(cdi, &cgc); 960 961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 962 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 963 cgc.timeout = 3000*HZ; 964 cgc.quiet = 1; 965 cdi->ops->generic_packet(cdi, &cgc); 966 967 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 968 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 969 cgc.cmd[2] = 2; /* Close session */ 970 cgc.quiet = 1; 971 cgc.timeout = 3000*HZ; 972 cdi->ops->generic_packet(cdi, &cgc); 973 974 cdi->media_written = 0; 975 } 976 977 static int cdrom_close_write(struct cdrom_device_info *cdi) 978 { 979 #if 0 980 return cdrom_flush_cache(cdi); 981 #else 982 return 0; 983 #endif 984 } 985 986 /* badly broken, I know. Is due for a fixup anytime. */ 987 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks) 988 { 989 struct cdrom_tochdr header; 990 struct cdrom_tocentry entry; 991 int ret, i; 992 tracks->data = 0; 993 tracks->audio = 0; 994 tracks->cdi = 0; 995 tracks->xa = 0; 996 tracks->error = 0; 997 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); 998 /* Grab the TOC header so we can see how many tracks there are */ 999 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 1000 if (ret) { 1001 if (ret == -ENOMEDIUM) 1002 tracks->error = CDS_NO_DISC; 1003 else 1004 tracks->error = CDS_NO_INFO; 1005 return; 1006 } 1007 /* check what type of tracks are on this disc */ 1008 entry.cdte_format = CDROM_MSF; 1009 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) { 1010 entry.cdte_track = i; 1011 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) { 1012 tracks->error = CDS_NO_INFO; 1013 return; 1014 } 1015 if (entry.cdte_ctrl & CDROM_DATA_TRACK) { 1016 if (entry.cdte_format == 0x10) 1017 tracks->cdi++; 1018 else if (entry.cdte_format == 0x20) 1019 tracks->xa++; 1020 else 1021 tracks->data++; 1022 } else { 1023 tracks->audio++; 1024 } 1025 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n", 1026 i, entry.cdte_format, entry.cdte_ctrl); 1027 } 1028 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n", 1029 header.cdth_trk1, tracks->audio, tracks->data, 1030 tracks->cdi, tracks->xa); 1031 } 1032 1033 static 1034 int open_for_data(struct cdrom_device_info *cdi) 1035 { 1036 int ret; 1037 const struct cdrom_device_ops *cdo = cdi->ops; 1038 tracktype tracks; 1039 cd_dbg(CD_OPEN, "entering open_for_data\n"); 1040 /* Check if the driver can report drive status. If it can, we 1041 can do clever things. If it can't, well, we at least tried! */ 1042 if (cdo->drive_status != NULL) { 1043 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1044 cd_dbg(CD_OPEN, "drive_status=%d\n", ret); 1045 if (ret == CDS_TRAY_OPEN) { 1046 cd_dbg(CD_OPEN, "the tray is open...\n"); 1047 /* can/may i close it? */ 1048 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1049 cdi->options & CDO_AUTO_CLOSE) { 1050 cd_dbg(CD_OPEN, "trying to close the tray\n"); 1051 ret=cdo->tray_move(cdi,0); 1052 if (ret) { 1053 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n"); 1054 /* Ignore the error from the low 1055 level driver. We don't care why it 1056 couldn't close the tray. We only care 1057 that there is no disc in the drive, 1058 since that is the _REAL_ problem here.*/ 1059 ret=-ENOMEDIUM; 1060 goto clean_up_and_return; 1061 } 1062 } else { 1063 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n"); 1064 ret=-ENOMEDIUM; 1065 goto clean_up_and_return; 1066 } 1067 /* Ok, the door should be closed now.. Check again */ 1068 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1069 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1070 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n"); 1071 cd_dbg(CD_OPEN, "tray might not contain a medium\n"); 1072 ret=-ENOMEDIUM; 1073 goto clean_up_and_return; 1074 } 1075 cd_dbg(CD_OPEN, "the tray is now closed\n"); 1076 } 1077 /* the door should be closed now, check for the disc */ 1078 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1079 if (ret!=CDS_DISC_OK) { 1080 ret = -ENOMEDIUM; 1081 goto clean_up_and_return; 1082 } 1083 } 1084 cdrom_count_tracks(cdi, &tracks); 1085 if (tracks.error == CDS_NO_DISC) { 1086 cd_dbg(CD_OPEN, "bummer. no disc.\n"); 1087 ret=-ENOMEDIUM; 1088 goto clean_up_and_return; 1089 } 1090 /* CD-Players which don't use O_NONBLOCK, workman 1091 * for example, need bit CDO_CHECK_TYPE cleared! */ 1092 if (tracks.data==0) { 1093 if (cdi->options & CDO_CHECK_TYPE) { 1094 /* give people a warning shot, now that CDO_CHECK_TYPE 1095 is the default case! */ 1096 cd_dbg(CD_OPEN, "bummer. wrong media type.\n"); 1097 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n", 1098 (unsigned int)task_pid_nr(current)); 1099 ret=-EMEDIUMTYPE; 1100 goto clean_up_and_return; 1101 } 1102 else { 1103 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n"); 1104 } 1105 } 1106 1107 cd_dbg(CD_OPEN, "all seems well, opening the devicen"); 1108 1109 /* all seems well, we can open the device */ 1110 ret = cdo->open(cdi, 0); /* open for data */ 1111 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret); 1112 /* After all this careful checking, we shouldn't have problems 1113 opening the device, but we don't want the device locked if 1114 this somehow fails... */ 1115 if (ret) { 1116 cd_dbg(CD_OPEN, "open device failed\n"); 1117 goto clean_up_and_return; 1118 } 1119 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) { 1120 cdo->lock_door(cdi, 1); 1121 cd_dbg(CD_OPEN, "door locked\n"); 1122 } 1123 cd_dbg(CD_OPEN, "device opened successfully\n"); 1124 return ret; 1125 1126 /* Something failed. Try to unlock the drive, because some drivers 1127 (notably ide-cd) lock the drive after every command. This produced 1128 a nasty bug where after mount failed, the drive would remain locked! 1129 This ensures that the drive gets unlocked after a mount fails. This 1130 is a goto to avoid bloating the driver with redundant code. */ 1131 clean_up_and_return: 1132 cd_dbg(CD_OPEN, "open failed\n"); 1133 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1134 cdo->lock_door(cdi, 0); 1135 cd_dbg(CD_OPEN, "door unlocked\n"); 1136 } 1137 return ret; 1138 } 1139 1140 /* We use the open-option O_NONBLOCK to indicate that the 1141 * purpose of opening is only for subsequent ioctl() calls; no device 1142 * integrity checks are performed. 1143 * 1144 * We hope that all cd-player programs will adopt this convention. It 1145 * is in their own interest: device control becomes a lot easier 1146 * this way. 1147 */ 1148 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, 1149 fmode_t mode) 1150 { 1151 int ret; 1152 1153 cd_dbg(CD_OPEN, "entering cdrom_open\n"); 1154 1155 /* open is event synchronization point, check events first */ 1156 check_disk_change(bdev); 1157 1158 /* if this was a O_NONBLOCK open and we should honor the flags, 1159 * do a quick open without drive/disc integrity checks. */ 1160 cdi->use_count++; 1161 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) { 1162 ret = cdi->ops->open(cdi, 1); 1163 } else { 1164 ret = open_for_data(cdi); 1165 if (ret) 1166 goto err; 1167 cdrom_mmc3_profile(cdi); 1168 if (mode & FMODE_WRITE) { 1169 ret = -EROFS; 1170 if (cdrom_open_write(cdi)) 1171 goto err_release; 1172 if (!CDROM_CAN(CDC_RAM)) 1173 goto err_release; 1174 ret = 0; 1175 cdi->media_written = 0; 1176 } 1177 } 1178 1179 if (ret) 1180 goto err; 1181 1182 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1183 cdi->name, cdi->use_count); 1184 return 0; 1185 err_release: 1186 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1187 cdi->ops->lock_door(cdi, 0); 1188 cd_dbg(CD_OPEN, "door unlocked\n"); 1189 } 1190 cdi->ops->release(cdi); 1191 err: 1192 cdi->use_count--; 1193 return ret; 1194 } 1195 1196 /* This code is similar to that in open_for_data. The routine is called 1197 whenever an audio play operation is requested. 1198 */ 1199 static int check_for_audio_disc(struct cdrom_device_info *cdi, 1200 const struct cdrom_device_ops *cdo) 1201 { 1202 int ret; 1203 tracktype tracks; 1204 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n"); 1205 if (!(cdi->options & CDO_CHECK_TYPE)) 1206 return 0; 1207 if (cdo->drive_status != NULL) { 1208 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1209 cd_dbg(CD_OPEN, "drive_status=%d\n", ret); 1210 if (ret == CDS_TRAY_OPEN) { 1211 cd_dbg(CD_OPEN, "the tray is open...\n"); 1212 /* can/may i close it? */ 1213 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1214 cdi->options & CDO_AUTO_CLOSE) { 1215 cd_dbg(CD_OPEN, "trying to close the tray\n"); 1216 ret=cdo->tray_move(cdi,0); 1217 if (ret) { 1218 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n"); 1219 /* Ignore the error from the low 1220 level driver. We don't care why it 1221 couldn't close the tray. We only care 1222 that there is no disc in the drive, 1223 since that is the _REAL_ problem here.*/ 1224 return -ENOMEDIUM; 1225 } 1226 } else { 1227 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n"); 1228 return -ENOMEDIUM; 1229 } 1230 /* Ok, the door should be closed now.. Check again */ 1231 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1232 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1233 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n"); 1234 return -ENOMEDIUM; 1235 } 1236 if (ret!=CDS_DISC_OK) { 1237 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n"); 1238 return -EIO; 1239 } 1240 cd_dbg(CD_OPEN, "the tray is now closed\n"); 1241 } 1242 } 1243 cdrom_count_tracks(cdi, &tracks); 1244 if (tracks.error) 1245 return(tracks.error); 1246 1247 if (tracks.audio==0) 1248 return -EMEDIUMTYPE; 1249 1250 return 0; 1251 } 1252 1253 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode) 1254 { 1255 const struct cdrom_device_ops *cdo = cdi->ops; 1256 int opened_for_data; 1257 1258 cd_dbg(CD_CLOSE, "entering cdrom_release\n"); 1259 1260 if (cdi->use_count > 0) 1261 cdi->use_count--; 1262 1263 if (cdi->use_count == 0) { 1264 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", 1265 cdi->name); 1266 cdrom_dvd_rw_close_write(cdi); 1267 1268 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) { 1269 cd_dbg(CD_CLOSE, "Unlocking door!\n"); 1270 cdo->lock_door(cdi, 0); 1271 } 1272 } 1273 1274 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) || 1275 !(mode & FMODE_NDELAY); 1276 1277 /* 1278 * flush cache on last write release 1279 */ 1280 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data) 1281 cdrom_close_write(cdi); 1282 1283 cdo->release(cdi); 1284 if (cdi->use_count == 0) { /* last process that closes dev*/ 1285 if (opened_for_data && 1286 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY)) 1287 cdo->tray_move(cdi, 1); 1288 } 1289 } 1290 1291 static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 1292 struct cdrom_changer_info *buf) 1293 { 1294 struct packet_command cgc; 1295 const struct cdrom_device_ops *cdo = cdi->ops; 1296 int length; 1297 1298 /* 1299 * Sanyo changer isn't spec compliant (doesn't use regular change 1300 * LOAD_UNLOAD command, and it doesn't implement the mech status 1301 * command below 1302 */ 1303 if (cdi->sanyo_slot) { 1304 buf->hdr.nslots = 3; 1305 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot; 1306 for (length = 0; length < 3; length++) { 1307 buf->slots[length].disc_present = 1; 1308 buf->slots[length].change = 0; 1309 } 1310 return 0; 1311 } 1312 1313 length = sizeof(struct cdrom_mechstat_header) + 1314 cdi->capacity * sizeof(struct cdrom_slot); 1315 1316 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ); 1317 cgc.cmd[0] = GPCMD_MECHANISM_STATUS; 1318 cgc.cmd[8] = (length >> 8) & 0xff; 1319 cgc.cmd[9] = length & 0xff; 1320 return cdo->generic_packet(cdi, &cgc); 1321 } 1322 1323 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot) 1324 { 1325 struct cdrom_changer_info *info; 1326 int ret; 1327 1328 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n"); 1329 if (cdi->sanyo_slot) 1330 return CDS_NO_INFO; 1331 1332 info = kmalloc(sizeof(*info), GFP_KERNEL); 1333 if (!info) 1334 return -ENOMEM; 1335 1336 if ((ret = cdrom_read_mech_status(cdi, info))) 1337 goto out_free; 1338 1339 if (info->slots[slot].disc_present) 1340 ret = CDS_DISC_OK; 1341 else 1342 ret = CDS_NO_DISC; 1343 1344 out_free: 1345 kfree(info); 1346 return ret; 1347 } 1348 1349 /* Return the number of slots for an ATAPI/SCSI cdrom, 1350 * return 1 if not a changer. 1351 */ 1352 int cdrom_number_of_slots(struct cdrom_device_info *cdi) 1353 { 1354 int status; 1355 int nslots = 1; 1356 struct cdrom_changer_info *info; 1357 1358 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 1359 /* cdrom_read_mech_status requires a valid value for capacity: */ 1360 cdi->capacity = 0; 1361 1362 info = kmalloc(sizeof(*info), GFP_KERNEL); 1363 if (!info) 1364 return -ENOMEM; 1365 1366 if ((status = cdrom_read_mech_status(cdi, info)) == 0) 1367 nslots = info->hdr.nslots; 1368 1369 kfree(info); 1370 return nslots; 1371 } 1372 1373 1374 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */ 1375 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 1376 { 1377 struct packet_command cgc; 1378 1379 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n"); 1380 if (cdi->sanyo_slot && slot < 0) 1381 return 0; 1382 1383 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 1384 cgc.cmd[0] = GPCMD_LOAD_UNLOAD; 1385 cgc.cmd[4] = 2 + (slot >= 0); 1386 cgc.cmd[8] = slot; 1387 cgc.timeout = 60 * HZ; 1388 1389 /* The Sanyo 3 CD changer uses byte 7 of the 1390 GPCMD_TEST_UNIT_READY to command to switch CDs instead of 1391 using the GPCMD_LOAD_UNLOAD opcode. */ 1392 if (cdi->sanyo_slot && -1 < slot) { 1393 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 1394 cgc.cmd[7] = slot; 1395 cgc.cmd[4] = cgc.cmd[8] = 0; 1396 cdi->sanyo_slot = slot ? slot : 3; 1397 } 1398 1399 return cdi->ops->generic_packet(cdi, &cgc); 1400 } 1401 1402 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot) 1403 { 1404 struct cdrom_changer_info *info; 1405 int curslot; 1406 int ret; 1407 1408 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n"); 1409 if (!CDROM_CAN(CDC_SELECT_DISC)) 1410 return -EDRIVE_CANT_DO_THIS; 1411 1412 if (cdi->ops->check_events) 1413 cdi->ops->check_events(cdi, 0, slot); 1414 else 1415 cdi->ops->media_changed(cdi, slot); 1416 1417 if (slot == CDSL_NONE) { 1418 /* set media changed bits, on both queues */ 1419 cdi->mc_flags = 0x3; 1420 return cdrom_load_unload(cdi, -1); 1421 } 1422 1423 info = kmalloc(sizeof(*info), GFP_KERNEL); 1424 if (!info) 1425 return -ENOMEM; 1426 1427 if ((ret = cdrom_read_mech_status(cdi, info))) { 1428 kfree(info); 1429 return ret; 1430 } 1431 1432 curslot = info->hdr.curslot; 1433 kfree(info); 1434 1435 if (cdi->use_count > 1 || cdi->keeplocked) { 1436 if (slot == CDSL_CURRENT) { 1437 return curslot; 1438 } else { 1439 return -EBUSY; 1440 } 1441 } 1442 1443 /* Specifying CDSL_CURRENT will attempt to load the currnet slot, 1444 which is useful if it had been previously unloaded. 1445 Whether it can or not, it returns the current slot. 1446 Similarly, if slot happens to be the current one, we still 1447 try and load it. */ 1448 if (slot == CDSL_CURRENT) 1449 slot = curslot; 1450 1451 /* set media changed bits on both queues */ 1452 cdi->mc_flags = 0x3; 1453 if ((ret = cdrom_load_unload(cdi, slot))) 1454 return ret; 1455 1456 return slot; 1457 } 1458 1459 /* 1460 * As cdrom implements an extra ioctl consumer for media changed 1461 * event, it needs to buffer ->check_events() output, such that event 1462 * is not lost for both the usual VFS and ioctl paths. 1463 * cdi->{vfs|ioctl}_events are used to buffer pending events for each 1464 * path. 1465 * 1466 * XXX: Locking is non-existent. cdi->ops->check_events() can be 1467 * called in parallel and buffering fields are accessed without any 1468 * exclusion. The original media_changed code had the same problem. 1469 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl 1470 * and remove this cruft altogether. It doesn't have much usefulness 1471 * at this point. 1472 */ 1473 static void cdrom_update_events(struct cdrom_device_info *cdi, 1474 unsigned int clearing) 1475 { 1476 unsigned int events; 1477 1478 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT); 1479 cdi->vfs_events |= events; 1480 cdi->ioctl_events |= events; 1481 } 1482 1483 unsigned int cdrom_check_events(struct cdrom_device_info *cdi, 1484 unsigned int clearing) 1485 { 1486 unsigned int events; 1487 1488 cdrom_update_events(cdi, clearing); 1489 events = cdi->vfs_events; 1490 cdi->vfs_events = 0; 1491 return events; 1492 } 1493 EXPORT_SYMBOL(cdrom_check_events); 1494 1495 /* We want to make media_changed accessible to the user through an 1496 * ioctl. The main problem now is that we must double-buffer the 1497 * low-level implementation, to assure that the VFS and the user both 1498 * see a medium change once. 1499 */ 1500 1501 static 1502 int media_changed(struct cdrom_device_info *cdi, int queue) 1503 { 1504 unsigned int mask = (1 << (queue & 1)); 1505 int ret = !!(cdi->mc_flags & mask); 1506 bool changed; 1507 1508 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1509 return ret; 1510 1511 /* changed since last call? */ 1512 if (cdi->ops->check_events) { 1513 BUG_ON(!queue); /* shouldn't be called from VFS path */ 1514 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE); 1515 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE; 1516 cdi->ioctl_events = 0; 1517 } else 1518 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT); 1519 1520 if (changed) { 1521 cdi->mc_flags = 0x3; /* set bit on both queues */ 1522 ret |= 1; 1523 cdi->media_written = 0; 1524 } 1525 1526 cdi->mc_flags &= ~mask; /* clear bit */ 1527 return ret; 1528 } 1529 1530 int cdrom_media_changed(struct cdrom_device_info *cdi) 1531 { 1532 /* This talks to the VFS, which doesn't like errors - just 1 or 0. 1533 * Returning "0" is always safe (media hasn't been changed). Do that 1534 * if the low-level cdrom driver dosn't support media changed. */ 1535 if (cdi == NULL || cdi->ops->media_changed == NULL) 1536 return 0; 1537 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1538 return 0; 1539 return media_changed(cdi, 0); 1540 } 1541 1542 /* Requests to the low-level drivers will /always/ be done in the 1543 following format convention: 1544 1545 CDROM_LBA: all data-related requests. 1546 CDROM_MSF: all audio-related requests. 1547 1548 However, a low-level implementation is allowed to refuse this 1549 request, and return information in its own favorite format. 1550 1551 It doesn't make sense /at all/ to ask for a play_audio in LBA 1552 format, or ask for multi-session info in MSF format. However, for 1553 backward compatibility these format requests will be satisfied, but 1554 the requests to the low-level drivers will be sanitized in the more 1555 meaningful format indicated above. 1556 */ 1557 1558 static 1559 void sanitize_format(union cdrom_addr *addr, 1560 u_char * curr, u_char requested) 1561 { 1562 if (*curr == requested) 1563 return; /* nothing to be done! */ 1564 if (requested == CDROM_LBA) { 1565 addr->lba = (int) addr->msf.frame + 1566 75 * (addr->msf.second - 2 + 60 * addr->msf.minute); 1567 } else { /* CDROM_MSF */ 1568 int lba = addr->lba; 1569 addr->msf.frame = lba % 75; 1570 lba /= 75; 1571 lba += 2; 1572 addr->msf.second = lba % 60; 1573 addr->msf.minute = lba / 60; 1574 } 1575 *curr = requested; 1576 } 1577 1578 void init_cdrom_command(struct packet_command *cgc, void *buf, int len, 1579 int type) 1580 { 1581 memset(cgc, 0, sizeof(struct packet_command)); 1582 if (buf) 1583 memset(buf, 0, len); 1584 cgc->buffer = (char *) buf; 1585 cgc->buflen = len; 1586 cgc->data_direction = type; 1587 cgc->timeout = CDROM_DEF_TIMEOUT; 1588 } 1589 1590 /* DVD handling */ 1591 1592 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) 1593 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) 1594 1595 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type) 1596 { 1597 cgc->cmd[0] = GPCMD_REPORT_KEY; 1598 cgc->cmd[10] = type | (agid << 6); 1599 switch (type) { 1600 case 0: case 8: case 5: { 1601 cgc->buflen = 8; 1602 break; 1603 } 1604 case 1: { 1605 cgc->buflen = 16; 1606 break; 1607 } 1608 case 2: case 4: { 1609 cgc->buflen = 12; 1610 break; 1611 } 1612 } 1613 cgc->cmd[9] = cgc->buflen; 1614 cgc->data_direction = CGC_DATA_READ; 1615 } 1616 1617 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type) 1618 { 1619 cgc->cmd[0] = GPCMD_SEND_KEY; 1620 cgc->cmd[10] = type | (agid << 6); 1621 switch (type) { 1622 case 1: { 1623 cgc->buflen = 16; 1624 break; 1625 } 1626 case 3: { 1627 cgc->buflen = 12; 1628 break; 1629 } 1630 case 6: { 1631 cgc->buflen = 8; 1632 break; 1633 } 1634 } 1635 cgc->cmd[9] = cgc->buflen; 1636 cgc->data_direction = CGC_DATA_WRITE; 1637 } 1638 1639 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai) 1640 { 1641 int ret; 1642 u_char buf[20]; 1643 struct packet_command cgc; 1644 const struct cdrom_device_ops *cdo = cdi->ops; 1645 rpc_state_t rpc_state; 1646 1647 memset(buf, 0, sizeof(buf)); 1648 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ); 1649 1650 switch (ai->type) { 1651 /* LU data send */ 1652 case DVD_LU_SEND_AGID: 1653 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n"); 1654 cgc.quiet = 1; 1655 setup_report_key(&cgc, ai->lsa.agid, 0); 1656 1657 if ((ret = cdo->generic_packet(cdi, &cgc))) 1658 return ret; 1659 1660 ai->lsa.agid = buf[7] >> 6; 1661 /* Returning data, let host change state */ 1662 break; 1663 1664 case DVD_LU_SEND_KEY1: 1665 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n"); 1666 setup_report_key(&cgc, ai->lsk.agid, 2); 1667 1668 if ((ret = cdo->generic_packet(cdi, &cgc))) 1669 return ret; 1670 1671 copy_key(ai->lsk.key, &buf[4]); 1672 /* Returning data, let host change state */ 1673 break; 1674 1675 case DVD_LU_SEND_CHALLENGE: 1676 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n"); 1677 setup_report_key(&cgc, ai->lsc.agid, 1); 1678 1679 if ((ret = cdo->generic_packet(cdi, &cgc))) 1680 return ret; 1681 1682 copy_chal(ai->lsc.chal, &buf[4]); 1683 /* Returning data, let host change state */ 1684 break; 1685 1686 /* Post-auth key */ 1687 case DVD_LU_SEND_TITLE_KEY: 1688 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n"); 1689 cgc.quiet = 1; 1690 setup_report_key(&cgc, ai->lstk.agid, 4); 1691 cgc.cmd[5] = ai->lstk.lba; 1692 cgc.cmd[4] = ai->lstk.lba >> 8; 1693 cgc.cmd[3] = ai->lstk.lba >> 16; 1694 cgc.cmd[2] = ai->lstk.lba >> 24; 1695 1696 if ((ret = cdo->generic_packet(cdi, &cgc))) 1697 return ret; 1698 1699 ai->lstk.cpm = (buf[4] >> 7) & 1; 1700 ai->lstk.cp_sec = (buf[4] >> 6) & 1; 1701 ai->lstk.cgms = (buf[4] >> 4) & 3; 1702 copy_key(ai->lstk.title_key, &buf[5]); 1703 /* Returning data, let host change state */ 1704 break; 1705 1706 case DVD_LU_SEND_ASF: 1707 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n"); 1708 setup_report_key(&cgc, ai->lsasf.agid, 5); 1709 1710 if ((ret = cdo->generic_packet(cdi, &cgc))) 1711 return ret; 1712 1713 ai->lsasf.asf = buf[7] & 1; 1714 break; 1715 1716 /* LU data receive (LU changes state) */ 1717 case DVD_HOST_SEND_CHALLENGE: 1718 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n"); 1719 setup_send_key(&cgc, ai->hsc.agid, 1); 1720 buf[1] = 0xe; 1721 copy_chal(&buf[4], ai->hsc.chal); 1722 1723 if ((ret = cdo->generic_packet(cdi, &cgc))) 1724 return ret; 1725 1726 ai->type = DVD_LU_SEND_KEY1; 1727 break; 1728 1729 case DVD_HOST_SEND_KEY2: 1730 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n"); 1731 setup_send_key(&cgc, ai->hsk.agid, 3); 1732 buf[1] = 0xa; 1733 copy_key(&buf[4], ai->hsk.key); 1734 1735 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1736 ai->type = DVD_AUTH_FAILURE; 1737 return ret; 1738 } 1739 ai->type = DVD_AUTH_ESTABLISHED; 1740 break; 1741 1742 /* Misc */ 1743 case DVD_INVALIDATE_AGID: 1744 cgc.quiet = 1; 1745 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n"); 1746 setup_report_key(&cgc, ai->lsa.agid, 0x3f); 1747 if ((ret = cdo->generic_packet(cdi, &cgc))) 1748 return ret; 1749 break; 1750 1751 /* Get region settings */ 1752 case DVD_LU_SEND_RPC_STATE: 1753 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n"); 1754 setup_report_key(&cgc, 0, 8); 1755 memset(&rpc_state, 0, sizeof(rpc_state_t)); 1756 cgc.buffer = (char *) &rpc_state; 1757 1758 if ((ret = cdo->generic_packet(cdi, &cgc))) 1759 return ret; 1760 1761 ai->lrpcs.type = rpc_state.type_code; 1762 ai->lrpcs.vra = rpc_state.vra; 1763 ai->lrpcs.ucca = rpc_state.ucca; 1764 ai->lrpcs.region_mask = rpc_state.region_mask; 1765 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; 1766 break; 1767 1768 /* Set region settings */ 1769 case DVD_HOST_SEND_RPC_STATE: 1770 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n"); 1771 setup_send_key(&cgc, 0, 6); 1772 buf[1] = 6; 1773 buf[4] = ai->hrpcs.pdrc; 1774 1775 if ((ret = cdo->generic_packet(cdi, &cgc))) 1776 return ret; 1777 break; 1778 1779 default: 1780 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type); 1781 return -ENOTTY; 1782 } 1783 1784 return 0; 1785 } 1786 1787 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s, 1788 struct packet_command *cgc) 1789 { 1790 unsigned char buf[21], *base; 1791 struct dvd_layer *layer; 1792 const struct cdrom_device_ops *cdo = cdi->ops; 1793 int ret, layer_num = s->physical.layer_num; 1794 1795 if (layer_num >= DVD_LAYERS) 1796 return -EINVAL; 1797 1798 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1799 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1800 cgc->cmd[6] = layer_num; 1801 cgc->cmd[7] = s->type; 1802 cgc->cmd[9] = cgc->buflen & 0xff; 1803 1804 /* 1805 * refrain from reporting errors on non-existing layers (mainly) 1806 */ 1807 cgc->quiet = 1; 1808 1809 ret = cdo->generic_packet(cdi, cgc); 1810 if (ret) 1811 return ret; 1812 1813 base = &buf[4]; 1814 layer = &s->physical.layer[layer_num]; 1815 1816 /* 1817 * place the data... really ugly, but at least we won't have to 1818 * worry about endianess in userspace. 1819 */ 1820 memset(layer, 0, sizeof(*layer)); 1821 layer->book_version = base[0] & 0xf; 1822 layer->book_type = base[0] >> 4; 1823 layer->min_rate = base[1] & 0xf; 1824 layer->disc_size = base[1] >> 4; 1825 layer->layer_type = base[2] & 0xf; 1826 layer->track_path = (base[2] >> 4) & 1; 1827 layer->nlayers = (base[2] >> 5) & 3; 1828 layer->track_density = base[3] & 0xf; 1829 layer->linear_density = base[3] >> 4; 1830 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7]; 1831 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11]; 1832 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15]; 1833 layer->bca = base[16] >> 7; 1834 1835 return 0; 1836 } 1837 1838 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s, 1839 struct packet_command *cgc) 1840 { 1841 int ret; 1842 u_char buf[8]; 1843 const struct cdrom_device_ops *cdo = cdi->ops; 1844 1845 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1846 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1847 cgc->cmd[6] = s->copyright.layer_num; 1848 cgc->cmd[7] = s->type; 1849 cgc->cmd[8] = cgc->buflen >> 8; 1850 cgc->cmd[9] = cgc->buflen & 0xff; 1851 1852 ret = cdo->generic_packet(cdi, cgc); 1853 if (ret) 1854 return ret; 1855 1856 s->copyright.cpst = buf[4]; 1857 s->copyright.rmi = buf[5]; 1858 1859 return 0; 1860 } 1861 1862 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s, 1863 struct packet_command *cgc) 1864 { 1865 int ret, size; 1866 u_char *buf; 1867 const struct cdrom_device_ops *cdo = cdi->ops; 1868 1869 size = sizeof(s->disckey.value) + 4; 1870 1871 buf = kmalloc(size, GFP_KERNEL); 1872 if (!buf) 1873 return -ENOMEM; 1874 1875 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1876 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1877 cgc->cmd[7] = s->type; 1878 cgc->cmd[8] = size >> 8; 1879 cgc->cmd[9] = size & 0xff; 1880 cgc->cmd[10] = s->disckey.agid << 6; 1881 1882 ret = cdo->generic_packet(cdi, cgc); 1883 if (!ret) 1884 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value)); 1885 1886 kfree(buf); 1887 return ret; 1888 } 1889 1890 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s, 1891 struct packet_command *cgc) 1892 { 1893 int ret, size = 4 + 188; 1894 u_char *buf; 1895 const struct cdrom_device_ops *cdo = cdi->ops; 1896 1897 buf = kmalloc(size, GFP_KERNEL); 1898 if (!buf) 1899 return -ENOMEM; 1900 1901 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1902 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1903 cgc->cmd[7] = s->type; 1904 cgc->cmd[9] = cgc->buflen & 0xff; 1905 1906 ret = cdo->generic_packet(cdi, cgc); 1907 if (ret) 1908 goto out; 1909 1910 s->bca.len = buf[0] << 8 | buf[1]; 1911 if (s->bca.len < 12 || s->bca.len > 188) { 1912 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n", 1913 s->bca.len); 1914 ret = -EIO; 1915 goto out; 1916 } 1917 memcpy(s->bca.value, &buf[4], s->bca.len); 1918 ret = 0; 1919 out: 1920 kfree(buf); 1921 return ret; 1922 } 1923 1924 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s, 1925 struct packet_command *cgc) 1926 { 1927 int ret = 0, size; 1928 u_char *buf; 1929 const struct cdrom_device_ops *cdo = cdi->ops; 1930 1931 size = sizeof(s->manufact.value) + 4; 1932 1933 buf = kmalloc(size, GFP_KERNEL); 1934 if (!buf) 1935 return -ENOMEM; 1936 1937 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1938 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1939 cgc->cmd[7] = s->type; 1940 cgc->cmd[8] = size >> 8; 1941 cgc->cmd[9] = size & 0xff; 1942 1943 ret = cdo->generic_packet(cdi, cgc); 1944 if (ret) 1945 goto out; 1946 1947 s->manufact.len = buf[0] << 8 | buf[1]; 1948 if (s->manufact.len < 0) { 1949 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n", 1950 s->manufact.len); 1951 ret = -EIO; 1952 } else { 1953 if (s->manufact.len > 2048) { 1954 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n", 1955 s->manufact.len); 1956 s->manufact.len = 2048; 1957 } 1958 memcpy(s->manufact.value, &buf[4], s->manufact.len); 1959 } 1960 1961 out: 1962 kfree(buf); 1963 return ret; 1964 } 1965 1966 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s, 1967 struct packet_command *cgc) 1968 { 1969 switch (s->type) { 1970 case DVD_STRUCT_PHYSICAL: 1971 return dvd_read_physical(cdi, s, cgc); 1972 1973 case DVD_STRUCT_COPYRIGHT: 1974 return dvd_read_copyright(cdi, s, cgc); 1975 1976 case DVD_STRUCT_DISCKEY: 1977 return dvd_read_disckey(cdi, s, cgc); 1978 1979 case DVD_STRUCT_BCA: 1980 return dvd_read_bca(cdi, s, cgc); 1981 1982 case DVD_STRUCT_MANUFACT: 1983 return dvd_read_manufact(cdi, s, cgc); 1984 1985 default: 1986 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n", 1987 s->type); 1988 return -EINVAL; 1989 } 1990 } 1991 1992 int cdrom_mode_sense(struct cdrom_device_info *cdi, 1993 struct packet_command *cgc, 1994 int page_code, int page_control) 1995 { 1996 const struct cdrom_device_ops *cdo = cdi->ops; 1997 1998 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1999 2000 cgc->cmd[0] = GPCMD_MODE_SENSE_10; 2001 cgc->cmd[2] = page_code | (page_control << 6); 2002 cgc->cmd[7] = cgc->buflen >> 8; 2003 cgc->cmd[8] = cgc->buflen & 0xff; 2004 cgc->data_direction = CGC_DATA_READ; 2005 return cdo->generic_packet(cdi, cgc); 2006 } 2007 2008 int cdrom_mode_select(struct cdrom_device_info *cdi, 2009 struct packet_command *cgc) 2010 { 2011 const struct cdrom_device_ops *cdo = cdi->ops; 2012 2013 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 2014 memset(cgc->buffer, 0, 2); 2015 cgc->cmd[0] = GPCMD_MODE_SELECT_10; 2016 cgc->cmd[1] = 0x10; /* PF */ 2017 cgc->cmd[7] = cgc->buflen >> 8; 2018 cgc->cmd[8] = cgc->buflen & 0xff; 2019 cgc->data_direction = CGC_DATA_WRITE; 2020 return cdo->generic_packet(cdi, cgc); 2021 } 2022 2023 static int cdrom_read_subchannel(struct cdrom_device_info *cdi, 2024 struct cdrom_subchnl *subchnl, int mcn) 2025 { 2026 const struct cdrom_device_ops *cdo = cdi->ops; 2027 struct packet_command cgc; 2028 char buffer[32]; 2029 int ret; 2030 2031 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ); 2032 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 2033 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */ 2034 cgc.cmd[2] = 0x40; /* request subQ data */ 2035 cgc.cmd[3] = mcn ? 2 : 1; 2036 cgc.cmd[8] = 16; 2037 2038 if ((ret = cdo->generic_packet(cdi, &cgc))) 2039 return ret; 2040 2041 subchnl->cdsc_audiostatus = cgc.buffer[1]; 2042 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf; 2043 subchnl->cdsc_trk = cgc.buffer[6]; 2044 subchnl->cdsc_ind = cgc.buffer[7]; 2045 2046 if (subchnl->cdsc_format == CDROM_LBA) { 2047 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) | 2048 (cgc.buffer[9] << 16) | 2049 (cgc.buffer[10] << 8) | 2050 (cgc.buffer[11])); 2051 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) | 2052 (cgc.buffer[13] << 16) | 2053 (cgc.buffer[14] << 8) | 2054 (cgc.buffer[15])); 2055 } else { 2056 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13]; 2057 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14]; 2058 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15]; 2059 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9]; 2060 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10]; 2061 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11]; 2062 } 2063 2064 return 0; 2065 } 2066 2067 /* 2068 * Specific READ_10 interface 2069 */ 2070 static int cdrom_read_cd(struct cdrom_device_info *cdi, 2071 struct packet_command *cgc, int lba, 2072 int blocksize, int nblocks) 2073 { 2074 const struct cdrom_device_ops *cdo = cdi->ops; 2075 2076 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2077 cgc->cmd[0] = GPCMD_READ_10; 2078 cgc->cmd[2] = (lba >> 24) & 0xff; 2079 cgc->cmd[3] = (lba >> 16) & 0xff; 2080 cgc->cmd[4] = (lba >> 8) & 0xff; 2081 cgc->cmd[5] = lba & 0xff; 2082 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2083 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2084 cgc->cmd[8] = nblocks & 0xff; 2085 cgc->buflen = blocksize * nblocks; 2086 return cdo->generic_packet(cdi, cgc); 2087 } 2088 2089 /* very generic interface for reading the various types of blocks */ 2090 static int cdrom_read_block(struct cdrom_device_info *cdi, 2091 struct packet_command *cgc, 2092 int lba, int nblocks, int format, int blksize) 2093 { 2094 const struct cdrom_device_ops *cdo = cdi->ops; 2095 2096 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2097 cgc->cmd[0] = GPCMD_READ_CD; 2098 /* expected sector size - cdda,mode1,etc. */ 2099 cgc->cmd[1] = format << 2; 2100 /* starting address */ 2101 cgc->cmd[2] = (lba >> 24) & 0xff; 2102 cgc->cmd[3] = (lba >> 16) & 0xff; 2103 cgc->cmd[4] = (lba >> 8) & 0xff; 2104 cgc->cmd[5] = lba & 0xff; 2105 /* number of blocks */ 2106 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2107 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2108 cgc->cmd[8] = nblocks & 0xff; 2109 cgc->buflen = blksize * nblocks; 2110 2111 /* set the header info returned */ 2112 switch (blksize) { 2113 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break; 2114 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break; 2115 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break; 2116 default : cgc->cmd[9] = 0x10; 2117 } 2118 2119 return cdo->generic_packet(cdi, cgc); 2120 } 2121 2122 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2123 int lba, int nframes) 2124 { 2125 struct packet_command cgc; 2126 int ret = 0; 2127 int nr; 2128 2129 cdi->last_sense = 0; 2130 2131 memset(&cgc, 0, sizeof(cgc)); 2132 2133 /* 2134 * start with will ra.nframes size, back down if alloc fails 2135 */ 2136 nr = nframes; 2137 do { 2138 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL); 2139 if (cgc.buffer) 2140 break; 2141 2142 nr >>= 1; 2143 } while (nr); 2144 2145 if (!nr) 2146 return -ENOMEM; 2147 2148 cgc.data_direction = CGC_DATA_READ; 2149 while (nframes > 0) { 2150 if (nr > nframes) 2151 nr = nframes; 2152 2153 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW); 2154 if (ret) 2155 break; 2156 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) { 2157 ret = -EFAULT; 2158 break; 2159 } 2160 ubuf += CD_FRAMESIZE_RAW * nr; 2161 nframes -= nr; 2162 lba += nr; 2163 } 2164 kfree(cgc.buffer); 2165 return ret; 2166 } 2167 2168 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2169 int lba, int nframes) 2170 { 2171 struct request_queue *q = cdi->disk->queue; 2172 struct request *rq; 2173 struct scsi_request *req; 2174 struct bio *bio; 2175 unsigned int len; 2176 int nr, ret = 0; 2177 2178 if (!q) 2179 return -ENXIO; 2180 2181 cdi->last_sense = 0; 2182 2183 while (nframes) { 2184 nr = nframes; 2185 if (cdi->cdda_method == CDDA_BPC_SINGLE) 2186 nr = 1; 2187 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9)) 2188 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW; 2189 2190 len = nr * CD_FRAMESIZE_RAW; 2191 2192 rq = blk_get_request(q, REQ_OP_SCSI_IN, GFP_KERNEL); 2193 if (IS_ERR(rq)) { 2194 ret = PTR_ERR(rq); 2195 break; 2196 } 2197 req = scsi_req(rq); 2198 scsi_req_init(rq); 2199 2200 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL); 2201 if (ret) { 2202 blk_put_request(rq); 2203 break; 2204 } 2205 2206 req->cmd[0] = GPCMD_READ_CD; 2207 req->cmd[1] = 1 << 2; 2208 req->cmd[2] = (lba >> 24) & 0xff; 2209 req->cmd[3] = (lba >> 16) & 0xff; 2210 req->cmd[4] = (lba >> 8) & 0xff; 2211 req->cmd[5] = lba & 0xff; 2212 req->cmd[6] = (nr >> 16) & 0xff; 2213 req->cmd[7] = (nr >> 8) & 0xff; 2214 req->cmd[8] = nr & 0xff; 2215 req->cmd[9] = 0xf8; 2216 2217 req->cmd_len = 12; 2218 rq->timeout = 60 * HZ; 2219 bio = rq->bio; 2220 2221 blk_execute_rq(q, cdi->disk, rq, 0); 2222 if (scsi_req(rq)->result) { 2223 struct request_sense *s = req->sense; 2224 ret = -EIO; 2225 cdi->last_sense = s->sense_key; 2226 } 2227 2228 if (blk_rq_unmap_user(bio)) 2229 ret = -EFAULT; 2230 blk_put_request(rq); 2231 2232 if (ret) 2233 break; 2234 2235 nframes -= nr; 2236 lba += nr; 2237 ubuf += len; 2238 } 2239 2240 return ret; 2241 } 2242 2243 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2244 int lba, int nframes) 2245 { 2246 int ret; 2247 2248 if (cdi->cdda_method == CDDA_OLD) 2249 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2250 2251 retry: 2252 /* 2253 * for anything else than success and io error, we need to retry 2254 */ 2255 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes); 2256 if (!ret || ret != -EIO) 2257 return ret; 2258 2259 /* 2260 * I've seen drives get sense 4/8/3 udma crc errors on multi 2261 * frame dma, so drop to single frame dma if we need to 2262 */ 2263 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) { 2264 pr_info("dropping to single frame dma\n"); 2265 cdi->cdda_method = CDDA_BPC_SINGLE; 2266 goto retry; 2267 } 2268 2269 /* 2270 * so we have an io error of some sort with multi frame dma. if the 2271 * condition wasn't a hardware error 2272 * problems, not for any error 2273 */ 2274 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b) 2275 return ret; 2276 2277 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense); 2278 cdi->cdda_method = CDDA_OLD; 2279 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2280 } 2281 2282 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi, 2283 void __user *argp) 2284 { 2285 struct cdrom_multisession ms_info; 2286 u8 requested_format; 2287 int ret; 2288 2289 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n"); 2290 2291 if (!(cdi->ops->capability & CDC_MULTI_SESSION)) 2292 return -ENOSYS; 2293 2294 if (copy_from_user(&ms_info, argp, sizeof(ms_info))) 2295 return -EFAULT; 2296 2297 requested_format = ms_info.addr_format; 2298 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2299 return -EINVAL; 2300 ms_info.addr_format = CDROM_LBA; 2301 2302 ret = cdi->ops->get_last_session(cdi, &ms_info); 2303 if (ret) 2304 return ret; 2305 2306 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format); 2307 2308 if (copy_to_user(argp, &ms_info, sizeof(ms_info))) 2309 return -EFAULT; 2310 2311 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n"); 2312 return 0; 2313 } 2314 2315 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi) 2316 { 2317 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n"); 2318 2319 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2320 return -ENOSYS; 2321 if (cdi->use_count != 1 || cdi->keeplocked) 2322 return -EBUSY; 2323 if (CDROM_CAN(CDC_LOCK)) { 2324 int ret = cdi->ops->lock_door(cdi, 0); 2325 if (ret) 2326 return ret; 2327 } 2328 2329 return cdi->ops->tray_move(cdi, 1); 2330 } 2331 2332 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi) 2333 { 2334 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n"); 2335 2336 if (!CDROM_CAN(CDC_CLOSE_TRAY)) 2337 return -ENOSYS; 2338 return cdi->ops->tray_move(cdi, 0); 2339 } 2340 2341 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi, 2342 unsigned long arg) 2343 { 2344 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n"); 2345 2346 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2347 return -ENOSYS; 2348 if (cdi->keeplocked) 2349 return -EBUSY; 2350 2351 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT); 2352 if (arg) 2353 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT; 2354 return 0; 2355 } 2356 2357 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, 2358 unsigned long arg) 2359 { 2360 struct cdrom_changer_info *info; 2361 int ret; 2362 2363 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 2364 2365 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2366 return -ENOSYS; 2367 2368 /* cannot select disc or select current disc */ 2369 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) 2370 return media_changed(cdi, 1); 2371 2372 if ((unsigned int)arg >= cdi->capacity) 2373 return -EINVAL; 2374 2375 info = kmalloc(sizeof(*info), GFP_KERNEL); 2376 if (!info) 2377 return -ENOMEM; 2378 2379 ret = cdrom_read_mech_status(cdi, info); 2380 if (!ret) 2381 ret = info->slots[arg].change; 2382 kfree(info); 2383 return ret; 2384 } 2385 2386 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi, 2387 unsigned long arg) 2388 { 2389 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n"); 2390 2391 /* 2392 * Options need to be in sync with capability. 2393 * Too late for that, so we have to check each one separately. 2394 */ 2395 switch (arg) { 2396 case CDO_USE_FFLAGS: 2397 case CDO_CHECK_TYPE: 2398 break; 2399 case CDO_LOCK: 2400 if (!CDROM_CAN(CDC_LOCK)) 2401 return -ENOSYS; 2402 break; 2403 case 0: 2404 return cdi->options; 2405 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */ 2406 default: 2407 if (!CDROM_CAN(arg)) 2408 return -ENOSYS; 2409 } 2410 cdi->options |= (int) arg; 2411 return cdi->options; 2412 } 2413 2414 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi, 2415 unsigned long arg) 2416 { 2417 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n"); 2418 2419 cdi->options &= ~(int) arg; 2420 return cdi->options; 2421 } 2422 2423 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi, 2424 unsigned long arg) 2425 { 2426 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n"); 2427 2428 if (!CDROM_CAN(CDC_SELECT_SPEED)) 2429 return -ENOSYS; 2430 return cdi->ops->select_speed(cdi, arg); 2431 } 2432 2433 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, 2434 unsigned long arg) 2435 { 2436 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n"); 2437 2438 if (!CDROM_CAN(CDC_SELECT_DISC)) 2439 return -ENOSYS; 2440 2441 if (arg != CDSL_CURRENT && arg != CDSL_NONE) { 2442 if ((int)arg >= cdi->capacity) 2443 return -EINVAL; 2444 } 2445 2446 /* 2447 * ->select_disc is a hook to allow a driver-specific way of 2448 * seleting disc. However, since there is no equivalent hook for 2449 * cdrom_slot_status this may not actually be useful... 2450 */ 2451 if (cdi->ops->select_disc) 2452 return cdi->ops->select_disc(cdi, arg); 2453 2454 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n"); 2455 return cdrom_select_disc(cdi, arg); 2456 } 2457 2458 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi, 2459 struct block_device *bdev) 2460 { 2461 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n"); 2462 2463 if (!capable(CAP_SYS_ADMIN)) 2464 return -EACCES; 2465 if (!CDROM_CAN(CDC_RESET)) 2466 return -ENOSYS; 2467 invalidate_bdev(bdev); 2468 return cdi->ops->reset(cdi); 2469 } 2470 2471 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi, 2472 unsigned long arg) 2473 { 2474 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl"); 2475 2476 if (!CDROM_CAN(CDC_LOCK)) 2477 return -EDRIVE_CANT_DO_THIS; 2478 2479 cdi->keeplocked = arg ? 1 : 0; 2480 2481 /* 2482 * Don't unlock the door on multiple opens by default, but allow 2483 * root to do so. 2484 */ 2485 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN)) 2486 return -EBUSY; 2487 return cdi->ops->lock_door(cdi, arg); 2488 } 2489 2490 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi, 2491 unsigned long arg) 2492 { 2493 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis"); 2494 2495 if (!capable(CAP_SYS_ADMIN)) 2496 return -EACCES; 2497 debug = arg ? 1 : 0; 2498 return debug; 2499 } 2500 2501 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi) 2502 { 2503 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n"); 2504 return (cdi->ops->capability & ~cdi->mask); 2505 } 2506 2507 /* 2508 * The following function is implemented, although very few audio 2509 * discs give Universal Product Code information, which should just be 2510 * the Medium Catalog Number on the box. Note, that the way the code 2511 * is written on the CD is /not/ uniform across all discs! 2512 */ 2513 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi, 2514 void __user *argp) 2515 { 2516 struct cdrom_mcn mcn; 2517 int ret; 2518 2519 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n"); 2520 2521 if (!(cdi->ops->capability & CDC_MCN)) 2522 return -ENOSYS; 2523 ret = cdi->ops->get_mcn(cdi, &mcn); 2524 if (ret) 2525 return ret; 2526 2527 if (copy_to_user(argp, &mcn, sizeof(mcn))) 2528 return -EFAULT; 2529 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n"); 2530 return 0; 2531 } 2532 2533 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi, 2534 unsigned long arg) 2535 { 2536 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n"); 2537 2538 if (!(cdi->ops->capability & CDC_DRIVE_STATUS)) 2539 return -ENOSYS; 2540 if (!CDROM_CAN(CDC_SELECT_DISC) || 2541 (arg == CDSL_CURRENT || arg == CDSL_NONE)) 2542 return cdi->ops->drive_status(cdi, CDSL_CURRENT); 2543 if (((int)arg >= cdi->capacity)) 2544 return -EINVAL; 2545 return cdrom_slot_status(cdi, arg); 2546 } 2547 2548 /* 2549 * Ok, this is where problems start. The current interface for the 2550 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that 2551 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this 2552 * is often the case, it is also very common for CDs to have some tracks 2553 * with data, and some tracks with audio. Just because I feel like it, 2554 * I declare the following to be the best way to cope. If the CD has ANY 2555 * data tracks on it, it will be returned as a data CD. If it has any XA 2556 * tracks, I will return it as that. Now I could simplify this interface 2557 * by combining these returns with the above, but this more clearly 2558 * demonstrates the problem with the current interface. Too bad this 2559 * wasn't designed to use bitmasks... -Erik 2560 * 2561 * Well, now we have the option CDS_MIXED: a mixed-type CD. 2562 * User level programmers might feel the ioctl is not very useful. 2563 * ---david 2564 */ 2565 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi) 2566 { 2567 tracktype tracks; 2568 2569 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n"); 2570 2571 cdrom_count_tracks(cdi, &tracks); 2572 if (tracks.error) 2573 return tracks.error; 2574 2575 /* Policy mode on */ 2576 if (tracks.audio > 0) { 2577 if (!tracks.data && !tracks.cdi && !tracks.xa) 2578 return CDS_AUDIO; 2579 else 2580 return CDS_MIXED; 2581 } 2582 2583 if (tracks.cdi > 0) 2584 return CDS_XA_2_2; 2585 if (tracks.xa > 0) 2586 return CDS_XA_2_1; 2587 if (tracks.data > 0) 2588 return CDS_DATA_1; 2589 /* Policy mode off */ 2590 2591 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n"); 2592 return CDS_NO_INFO; 2593 } 2594 2595 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi) 2596 { 2597 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n"); 2598 return cdi->capacity; 2599 } 2600 2601 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi, 2602 void __user *argp) 2603 { 2604 struct cdrom_subchnl q; 2605 u8 requested, back; 2606 int ret; 2607 2608 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/ 2609 2610 if (copy_from_user(&q, argp, sizeof(q))) 2611 return -EFAULT; 2612 2613 requested = q.cdsc_format; 2614 if (requested != CDROM_MSF && requested != CDROM_LBA) 2615 return -EINVAL; 2616 q.cdsc_format = CDROM_MSF; 2617 2618 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q); 2619 if (ret) 2620 return ret; 2621 2622 back = q.cdsc_format; /* local copy */ 2623 sanitize_format(&q.cdsc_absaddr, &back, requested); 2624 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2625 2626 if (copy_to_user(argp, &q, sizeof(q))) 2627 return -EFAULT; 2628 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2629 return 0; 2630 } 2631 2632 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 2633 void __user *argp) 2634 { 2635 struct cdrom_tochdr header; 2636 int ret; 2637 2638 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */ 2639 2640 if (copy_from_user(&header, argp, sizeof(header))) 2641 return -EFAULT; 2642 2643 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 2644 if (ret) 2645 return ret; 2646 2647 if (copy_to_user(argp, &header, sizeof(header))) 2648 return -EFAULT; 2649 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */ 2650 return 0; 2651 } 2652 2653 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi, 2654 void __user *argp) 2655 { 2656 struct cdrom_tocentry entry; 2657 u8 requested_format; 2658 int ret; 2659 2660 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */ 2661 2662 if (copy_from_user(&entry, argp, sizeof(entry))) 2663 return -EFAULT; 2664 2665 requested_format = entry.cdte_format; 2666 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2667 return -EINVAL; 2668 /* make interface to low-level uniform */ 2669 entry.cdte_format = CDROM_MSF; 2670 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry); 2671 if (ret) 2672 return ret; 2673 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format); 2674 2675 if (copy_to_user(argp, &entry, sizeof(entry))) 2676 return -EFAULT; 2677 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */ 2678 return 0; 2679 } 2680 2681 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi, 2682 void __user *argp) 2683 { 2684 struct cdrom_msf msf; 2685 2686 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2687 2688 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2689 return -ENOSYS; 2690 if (copy_from_user(&msf, argp, sizeof(msf))) 2691 return -EFAULT; 2692 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf); 2693 } 2694 2695 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi, 2696 void __user *argp) 2697 { 2698 struct cdrom_ti ti; 2699 int ret; 2700 2701 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n"); 2702 2703 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2704 return -ENOSYS; 2705 if (copy_from_user(&ti, argp, sizeof(ti))) 2706 return -EFAULT; 2707 2708 ret = check_for_audio_disc(cdi, cdi->ops); 2709 if (ret) 2710 return ret; 2711 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti); 2712 } 2713 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi, 2714 void __user *argp) 2715 { 2716 struct cdrom_volctrl volume; 2717 2718 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n"); 2719 2720 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2721 return -ENOSYS; 2722 if (copy_from_user(&volume, argp, sizeof(volume))) 2723 return -EFAULT; 2724 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume); 2725 } 2726 2727 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi, 2728 void __user *argp) 2729 { 2730 struct cdrom_volctrl volume; 2731 int ret; 2732 2733 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n"); 2734 2735 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2736 return -ENOSYS; 2737 2738 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume); 2739 if (ret) 2740 return ret; 2741 2742 if (copy_to_user(argp, &volume, sizeof(volume))) 2743 return -EFAULT; 2744 return 0; 2745 } 2746 2747 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi, 2748 unsigned int cmd) 2749 { 2750 int ret; 2751 2752 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n"); 2753 2754 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2755 return -ENOSYS; 2756 ret = check_for_audio_disc(cdi, cdi->ops); 2757 if (ret) 2758 return ret; 2759 return cdi->ops->audio_ioctl(cdi, cmd, NULL); 2760 } 2761 2762 /* 2763 * Required when we need to use READ_10 to issue other than 2048 block 2764 * reads 2765 */ 2766 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size) 2767 { 2768 const struct cdrom_device_ops *cdo = cdi->ops; 2769 struct packet_command cgc; 2770 struct modesel_head mh; 2771 2772 memset(&mh, 0, sizeof(mh)); 2773 mh.block_desc_length = 0x08; 2774 mh.block_length_med = (size >> 8) & 0xff; 2775 mh.block_length_lo = size & 0xff; 2776 2777 memset(&cgc, 0, sizeof(cgc)); 2778 cgc.cmd[0] = 0x15; 2779 cgc.cmd[1] = 1 << 4; 2780 cgc.cmd[4] = 12; 2781 cgc.buflen = sizeof(mh); 2782 cgc.buffer = (char *) &mh; 2783 cgc.data_direction = CGC_DATA_WRITE; 2784 mh.block_desc_length = 0x08; 2785 mh.block_length_med = (size >> 8) & 0xff; 2786 mh.block_length_lo = size & 0xff; 2787 2788 return cdo->generic_packet(cdi, &cgc); 2789 } 2790 2791 static int cdrom_get_track_info(struct cdrom_device_info *cdi, 2792 __u16 track, __u8 type, track_information *ti) 2793 { 2794 const struct cdrom_device_ops *cdo = cdi->ops; 2795 struct packet_command cgc; 2796 int ret, buflen; 2797 2798 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ); 2799 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO; 2800 cgc.cmd[1] = type & 3; 2801 cgc.cmd[4] = (track & 0xff00) >> 8; 2802 cgc.cmd[5] = track & 0xff; 2803 cgc.cmd[8] = 8; 2804 cgc.quiet = 1; 2805 2806 ret = cdo->generic_packet(cdi, &cgc); 2807 if (ret) 2808 return ret; 2809 2810 buflen = be16_to_cpu(ti->track_information_length) + 2811 sizeof(ti->track_information_length); 2812 2813 if (buflen > sizeof(track_information)) 2814 buflen = sizeof(track_information); 2815 2816 cgc.cmd[8] = cgc.buflen = buflen; 2817 ret = cdo->generic_packet(cdi, &cgc); 2818 if (ret) 2819 return ret; 2820 2821 /* return actual fill size */ 2822 return buflen; 2823 } 2824 2825 /* return the last written block on the CD-R media. this is for the udf 2826 file system. */ 2827 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) 2828 { 2829 struct cdrom_tocentry toc; 2830 disc_information di; 2831 track_information ti; 2832 __u32 last_track; 2833 int ret = -1, ti_size; 2834 2835 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 2836 goto use_toc; 2837 2838 ret = cdrom_get_disc_info(cdi, &di); 2839 if (ret < (int)(offsetof(typeof(di), last_track_lsb) 2840 + sizeof(di.last_track_lsb))) 2841 goto use_toc; 2842 2843 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 2844 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 2845 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2846 if (ti_size < (int)offsetof(typeof(ti), track_start)) 2847 goto use_toc; 2848 2849 /* if this track is blank, try the previous. */ 2850 if (ti.blank) { 2851 if (last_track == 1) 2852 goto use_toc; 2853 last_track--; 2854 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2855 } 2856 2857 if (ti_size < (int)(offsetof(typeof(ti), track_size) 2858 + sizeof(ti.track_size))) 2859 goto use_toc; 2860 2861 /* if last recorded field is valid, return it. */ 2862 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address) 2863 + sizeof(ti.last_rec_address))) { 2864 *last_written = be32_to_cpu(ti.last_rec_address); 2865 } else { 2866 /* make it up instead */ 2867 *last_written = be32_to_cpu(ti.track_start) + 2868 be32_to_cpu(ti.track_size); 2869 if (ti.free_blocks) 2870 *last_written -= (be32_to_cpu(ti.free_blocks) + 7); 2871 } 2872 return 0; 2873 2874 /* this is where we end up if the drive either can't do a 2875 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if 2876 it doesn't give enough information or fails. then we return 2877 the toc contents. */ 2878 use_toc: 2879 toc.cdte_format = CDROM_MSF; 2880 toc.cdte_track = CDROM_LEADOUT; 2881 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) 2882 return ret; 2883 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA); 2884 *last_written = toc.cdte_addr.lba; 2885 return 0; 2886 } 2887 2888 /* return the next writable block. also for udf file system. */ 2889 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, 2890 long *next_writable) 2891 { 2892 disc_information di; 2893 track_information ti; 2894 __u16 last_track; 2895 int ret, ti_size; 2896 2897 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 2898 goto use_last_written; 2899 2900 ret = cdrom_get_disc_info(cdi, &di); 2901 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb) 2902 + sizeof(di.last_track_lsb)) 2903 goto use_last_written; 2904 2905 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 2906 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 2907 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2908 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start)) 2909 goto use_last_written; 2910 2911 /* if this track is blank, try the previous. */ 2912 if (ti.blank) { 2913 if (last_track == 1) 2914 goto use_last_written; 2915 last_track--; 2916 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2917 if (ti_size < 0) 2918 goto use_last_written; 2919 } 2920 2921 /* if next recordable address field is valid, use it. */ 2922 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable) 2923 + sizeof(ti.next_writable)) { 2924 *next_writable = be32_to_cpu(ti.next_writable); 2925 return 0; 2926 } 2927 2928 use_last_written: 2929 ret = cdrom_get_last_written(cdi, next_writable); 2930 if (ret) { 2931 *next_writable = 0; 2932 return ret; 2933 } else { 2934 *next_writable += 7; 2935 return 0; 2936 } 2937 } 2938 2939 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi, 2940 void __user *arg, 2941 struct packet_command *cgc, 2942 int cmd) 2943 { 2944 struct request_sense sense; 2945 struct cdrom_msf msf; 2946 int blocksize = 0, format = 0, lba; 2947 int ret; 2948 2949 switch (cmd) { 2950 case CDROMREADRAW: 2951 blocksize = CD_FRAMESIZE_RAW; 2952 break; 2953 case CDROMREADMODE1: 2954 blocksize = CD_FRAMESIZE; 2955 format = 2; 2956 break; 2957 case CDROMREADMODE2: 2958 blocksize = CD_FRAMESIZE_RAW0; 2959 break; 2960 } 2961 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf))) 2962 return -EFAULT; 2963 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0); 2964 /* FIXME: we need upper bound checking, too!! */ 2965 if (lba < 0) 2966 return -EINVAL; 2967 2968 cgc->buffer = kzalloc(blocksize, GFP_KERNEL); 2969 if (cgc->buffer == NULL) 2970 return -ENOMEM; 2971 2972 memset(&sense, 0, sizeof(sense)); 2973 cgc->sense = &sense; 2974 cgc->data_direction = CGC_DATA_READ; 2975 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize); 2976 if (ret && sense.sense_key == 0x05 && 2977 sense.asc == 0x20 && 2978 sense.ascq == 0x00) { 2979 /* 2980 * SCSI-II devices are not required to support 2981 * READ_CD, so let's try switching block size 2982 */ 2983 /* FIXME: switch back again... */ 2984 ret = cdrom_switch_blocksize(cdi, blocksize); 2985 if (ret) 2986 goto out; 2987 cgc->sense = NULL; 2988 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1); 2989 ret |= cdrom_switch_blocksize(cdi, blocksize); 2990 } 2991 if (!ret && copy_to_user(arg, cgc->buffer, blocksize)) 2992 ret = -EFAULT; 2993 out: 2994 kfree(cgc->buffer); 2995 return ret; 2996 } 2997 2998 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi, 2999 void __user *arg) 3000 { 3001 struct cdrom_read_audio ra; 3002 int lba; 3003 3004 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg, 3005 sizeof(ra))) 3006 return -EFAULT; 3007 3008 if (ra.addr_format == CDROM_MSF) 3009 lba = msf_to_lba(ra.addr.msf.minute, 3010 ra.addr.msf.second, 3011 ra.addr.msf.frame); 3012 else if (ra.addr_format == CDROM_LBA) 3013 lba = ra.addr.lba; 3014 else 3015 return -EINVAL; 3016 3017 /* FIXME: we need upper bound checking, too!! */ 3018 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES) 3019 return -EINVAL; 3020 3021 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes); 3022 } 3023 3024 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi, 3025 void __user *arg) 3026 { 3027 int ret; 3028 struct cdrom_subchnl q; 3029 u_char requested, back; 3030 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q))) 3031 return -EFAULT; 3032 requested = q.cdsc_format; 3033 if (!((requested == CDROM_MSF) || 3034 (requested == CDROM_LBA))) 3035 return -EINVAL; 3036 3037 ret = cdrom_read_subchannel(cdi, &q, 0); 3038 if (ret) 3039 return ret; 3040 back = q.cdsc_format; /* local copy */ 3041 sanitize_format(&q.cdsc_absaddr, &back, requested); 3042 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 3043 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q))) 3044 return -EFAULT; 3045 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 3046 return 0; 3047 } 3048 3049 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi, 3050 void __user *arg, 3051 struct packet_command *cgc) 3052 { 3053 const struct cdrom_device_ops *cdo = cdi->ops; 3054 struct cdrom_msf msf; 3055 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 3056 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf))) 3057 return -EFAULT; 3058 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF; 3059 cgc->cmd[3] = msf.cdmsf_min0; 3060 cgc->cmd[4] = msf.cdmsf_sec0; 3061 cgc->cmd[5] = msf.cdmsf_frame0; 3062 cgc->cmd[6] = msf.cdmsf_min1; 3063 cgc->cmd[7] = msf.cdmsf_sec1; 3064 cgc->cmd[8] = msf.cdmsf_frame1; 3065 cgc->data_direction = CGC_DATA_NONE; 3066 return cdo->generic_packet(cdi, cgc); 3067 } 3068 3069 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi, 3070 void __user *arg, 3071 struct packet_command *cgc) 3072 { 3073 const struct cdrom_device_ops *cdo = cdi->ops; 3074 struct cdrom_blk blk; 3075 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n"); 3076 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk))) 3077 return -EFAULT; 3078 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10; 3079 cgc->cmd[2] = (blk.from >> 24) & 0xff; 3080 cgc->cmd[3] = (blk.from >> 16) & 0xff; 3081 cgc->cmd[4] = (blk.from >> 8) & 0xff; 3082 cgc->cmd[5] = blk.from & 0xff; 3083 cgc->cmd[7] = (blk.len >> 8) & 0xff; 3084 cgc->cmd[8] = blk.len & 0xff; 3085 cgc->data_direction = CGC_DATA_NONE; 3086 return cdo->generic_packet(cdi, cgc); 3087 } 3088 3089 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi, 3090 void __user *arg, 3091 struct packet_command *cgc, 3092 unsigned int cmd) 3093 { 3094 struct cdrom_volctrl volctrl; 3095 unsigned char buffer[32]; 3096 char mask[sizeof(buffer)]; 3097 unsigned short offset; 3098 int ret; 3099 3100 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n"); 3101 3102 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg, 3103 sizeof(volctrl))) 3104 return -EFAULT; 3105 3106 cgc->buffer = buffer; 3107 cgc->buflen = 24; 3108 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0); 3109 if (ret) 3110 return ret; 3111 3112 /* originally the code depended on buffer[1] to determine 3113 how much data is available for transfer. buffer[1] is 3114 unfortunately ambigious and the only reliable way seem 3115 to be to simply skip over the block descriptor... */ 3116 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6)); 3117 3118 if (offset + 16 > sizeof(buffer)) 3119 return -E2BIG; 3120 3121 if (offset + 16 > cgc->buflen) { 3122 cgc->buflen = offset + 16; 3123 ret = cdrom_mode_sense(cdi, cgc, 3124 GPMODE_AUDIO_CTL_PAGE, 0); 3125 if (ret) 3126 return ret; 3127 } 3128 3129 /* sanity check */ 3130 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE || 3131 buffer[offset + 1] < 14) 3132 return -EINVAL; 3133 3134 /* now we have the current volume settings. if it was only 3135 a CDROMVOLREAD, return these values */ 3136 if (cmd == CDROMVOLREAD) { 3137 volctrl.channel0 = buffer[offset+9]; 3138 volctrl.channel1 = buffer[offset+11]; 3139 volctrl.channel2 = buffer[offset+13]; 3140 volctrl.channel3 = buffer[offset+15]; 3141 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl, 3142 sizeof(volctrl))) 3143 return -EFAULT; 3144 return 0; 3145 } 3146 3147 /* get the volume mask */ 3148 cgc->buffer = mask; 3149 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1); 3150 if (ret) 3151 return ret; 3152 3153 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9]; 3154 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11]; 3155 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13]; 3156 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15]; 3157 3158 /* set volume */ 3159 cgc->buffer = buffer + offset - 8; 3160 memset(cgc->buffer, 0, 8); 3161 return cdrom_mode_select(cdi, cgc); 3162 } 3163 3164 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi, 3165 struct packet_command *cgc, 3166 int cmd) 3167 { 3168 const struct cdrom_device_ops *cdo = cdi->ops; 3169 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n"); 3170 cgc->cmd[0] = GPCMD_START_STOP_UNIT; 3171 cgc->cmd[1] = 1; 3172 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0; 3173 cgc->data_direction = CGC_DATA_NONE; 3174 return cdo->generic_packet(cdi, cgc); 3175 } 3176 3177 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi, 3178 struct packet_command *cgc, 3179 int cmd) 3180 { 3181 const struct cdrom_device_ops *cdo = cdi->ops; 3182 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n"); 3183 cgc->cmd[0] = GPCMD_PAUSE_RESUME; 3184 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0; 3185 cgc->data_direction = CGC_DATA_NONE; 3186 return cdo->generic_packet(cdi, cgc); 3187 } 3188 3189 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi, 3190 void __user *arg, 3191 struct packet_command *cgc) 3192 { 3193 int ret; 3194 dvd_struct *s; 3195 int size = sizeof(dvd_struct); 3196 3197 if (!CDROM_CAN(CDC_DVD)) 3198 return -ENOSYS; 3199 3200 s = memdup_user(arg, size); 3201 if (IS_ERR(s)) 3202 return PTR_ERR(s); 3203 3204 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 3205 3206 ret = dvd_read_struct(cdi, s, cgc); 3207 if (ret) 3208 goto out; 3209 3210 if (copy_to_user(arg, s, size)) 3211 ret = -EFAULT; 3212 out: 3213 kfree(s); 3214 return ret; 3215 } 3216 3217 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi, 3218 void __user *arg) 3219 { 3220 int ret; 3221 dvd_authinfo ai; 3222 if (!CDROM_CAN(CDC_DVD)) 3223 return -ENOSYS; 3224 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n"); 3225 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai))) 3226 return -EFAULT; 3227 ret = dvd_do_auth(cdi, &ai); 3228 if (ret) 3229 return ret; 3230 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai))) 3231 return -EFAULT; 3232 return 0; 3233 } 3234 3235 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi, 3236 void __user *arg) 3237 { 3238 int ret; 3239 long next = 0; 3240 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 3241 ret = cdrom_get_next_writable(cdi, &next); 3242 if (ret) 3243 return ret; 3244 if (copy_to_user((long __user *)arg, &next, sizeof(next))) 3245 return -EFAULT; 3246 return 0; 3247 } 3248 3249 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi, 3250 void __user *arg) 3251 { 3252 int ret; 3253 long last = 0; 3254 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 3255 ret = cdrom_get_last_written(cdi, &last); 3256 if (ret) 3257 return ret; 3258 if (copy_to_user((long __user *)arg, &last, sizeof(last))) 3259 return -EFAULT; 3260 return 0; 3261 } 3262 3263 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 3264 unsigned long arg) 3265 { 3266 struct packet_command cgc; 3267 void __user *userptr = (void __user *)arg; 3268 3269 memset(&cgc, 0, sizeof(cgc)); 3270 3271 /* build a unified command and queue it through 3272 cdo->generic_packet() */ 3273 switch (cmd) { 3274 case CDROMREADRAW: 3275 case CDROMREADMODE1: 3276 case CDROMREADMODE2: 3277 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd); 3278 case CDROMREADAUDIO: 3279 return mmc_ioctl_cdrom_read_audio(cdi, userptr); 3280 case CDROMSUBCHNL: 3281 return mmc_ioctl_cdrom_subchannel(cdi, userptr); 3282 case CDROMPLAYMSF: 3283 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc); 3284 case CDROMPLAYBLK: 3285 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc); 3286 case CDROMVOLCTRL: 3287 case CDROMVOLREAD: 3288 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd); 3289 case CDROMSTART: 3290 case CDROMSTOP: 3291 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd); 3292 case CDROMPAUSE: 3293 case CDROMRESUME: 3294 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd); 3295 case DVD_READ_STRUCT: 3296 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc); 3297 case DVD_AUTH: 3298 return mmc_ioctl_dvd_auth(cdi, userptr); 3299 case CDROM_NEXT_WRITABLE: 3300 return mmc_ioctl_cdrom_next_writable(cdi, userptr); 3301 case CDROM_LAST_WRITTEN: 3302 return mmc_ioctl_cdrom_last_written(cdi, userptr); 3303 } 3304 3305 return -ENOTTY; 3306 } 3307 3308 /* 3309 * Just about every imaginable ioctl is supported in the Uniform layer 3310 * these days. 3311 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl(). 3312 */ 3313 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, 3314 fmode_t mode, unsigned int cmd, unsigned long arg) 3315 { 3316 void __user *argp = (void __user *)arg; 3317 int ret; 3318 3319 /* 3320 * Try the generic SCSI command ioctl's first. 3321 */ 3322 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp); 3323 if (ret != -ENOTTY) 3324 return ret; 3325 3326 switch (cmd) { 3327 case CDROMMULTISESSION: 3328 return cdrom_ioctl_multisession(cdi, argp); 3329 case CDROMEJECT: 3330 return cdrom_ioctl_eject(cdi); 3331 case CDROMCLOSETRAY: 3332 return cdrom_ioctl_closetray(cdi); 3333 case CDROMEJECT_SW: 3334 return cdrom_ioctl_eject_sw(cdi, arg); 3335 case CDROM_MEDIA_CHANGED: 3336 return cdrom_ioctl_media_changed(cdi, arg); 3337 case CDROM_SET_OPTIONS: 3338 return cdrom_ioctl_set_options(cdi, arg); 3339 case CDROM_CLEAR_OPTIONS: 3340 return cdrom_ioctl_clear_options(cdi, arg); 3341 case CDROM_SELECT_SPEED: 3342 return cdrom_ioctl_select_speed(cdi, arg); 3343 case CDROM_SELECT_DISC: 3344 return cdrom_ioctl_select_disc(cdi, arg); 3345 case CDROMRESET: 3346 return cdrom_ioctl_reset(cdi, bdev); 3347 case CDROM_LOCKDOOR: 3348 return cdrom_ioctl_lock_door(cdi, arg); 3349 case CDROM_DEBUG: 3350 return cdrom_ioctl_debug(cdi, arg); 3351 case CDROM_GET_CAPABILITY: 3352 return cdrom_ioctl_get_capability(cdi); 3353 case CDROM_GET_MCN: 3354 return cdrom_ioctl_get_mcn(cdi, argp); 3355 case CDROM_DRIVE_STATUS: 3356 return cdrom_ioctl_drive_status(cdi, arg); 3357 case CDROM_DISC_STATUS: 3358 return cdrom_ioctl_disc_status(cdi); 3359 case CDROM_CHANGER_NSLOTS: 3360 return cdrom_ioctl_changer_nslots(cdi); 3361 } 3362 3363 /* 3364 * Use the ioctls that are implemented through the generic_packet() 3365 * interface. this may look at bit funny, but if -ENOTTY is 3366 * returned that particular ioctl is not implemented and we 3367 * let it go through the device specific ones. 3368 */ 3369 if (CDROM_CAN(CDC_GENERIC_PACKET)) { 3370 ret = mmc_ioctl(cdi, cmd, arg); 3371 if (ret != -ENOTTY) 3372 return ret; 3373 } 3374 3375 /* 3376 * Note: most of the cd_dbg() calls are commented out here, 3377 * because they fill up the sys log when CD players poll 3378 * the drive. 3379 */ 3380 switch (cmd) { 3381 case CDROMSUBCHNL: 3382 return cdrom_ioctl_get_subchnl(cdi, argp); 3383 case CDROMREADTOCHDR: 3384 return cdrom_ioctl_read_tochdr(cdi, argp); 3385 case CDROMREADTOCENTRY: 3386 return cdrom_ioctl_read_tocentry(cdi, argp); 3387 case CDROMPLAYMSF: 3388 return cdrom_ioctl_play_msf(cdi, argp); 3389 case CDROMPLAYTRKIND: 3390 return cdrom_ioctl_play_trkind(cdi, argp); 3391 case CDROMVOLCTRL: 3392 return cdrom_ioctl_volctrl(cdi, argp); 3393 case CDROMVOLREAD: 3394 return cdrom_ioctl_volread(cdi, argp); 3395 case CDROMSTART: 3396 case CDROMSTOP: 3397 case CDROMPAUSE: 3398 case CDROMRESUME: 3399 return cdrom_ioctl_audioctl(cdi, cmd); 3400 } 3401 3402 return -ENOSYS; 3403 } 3404 3405 EXPORT_SYMBOL(cdrom_get_last_written); 3406 EXPORT_SYMBOL(register_cdrom); 3407 EXPORT_SYMBOL(unregister_cdrom); 3408 EXPORT_SYMBOL(cdrom_open); 3409 EXPORT_SYMBOL(cdrom_release); 3410 EXPORT_SYMBOL(cdrom_ioctl); 3411 EXPORT_SYMBOL(cdrom_media_changed); 3412 EXPORT_SYMBOL(cdrom_number_of_slots); 3413 EXPORT_SYMBOL(cdrom_mode_select); 3414 EXPORT_SYMBOL(cdrom_mode_sense); 3415 EXPORT_SYMBOL(init_cdrom_command); 3416 EXPORT_SYMBOL(cdrom_get_media_event); 3417 3418 #ifdef CONFIG_SYSCTL 3419 3420 #define CDROM_STR_SIZE 1000 3421 3422 static struct cdrom_sysctl_settings { 3423 char info[CDROM_STR_SIZE]; /* general info */ 3424 int autoclose; /* close tray upon mount, etc */ 3425 int autoeject; /* eject on umount */ 3426 int debug; /* turn on debugging messages */ 3427 int lock; /* lock the door on device open */ 3428 int check; /* check media type */ 3429 } cdrom_sysctl_settings; 3430 3431 enum cdrom_print_option { 3432 CTL_NAME, 3433 CTL_SPEED, 3434 CTL_SLOTS, 3435 CTL_CAPABILITY 3436 }; 3437 3438 static int cdrom_print_info(const char *header, int val, char *info, 3439 int *pos, enum cdrom_print_option option) 3440 { 3441 const int max_size = sizeof(cdrom_sysctl_settings.info); 3442 struct cdrom_device_info *cdi; 3443 int ret; 3444 3445 ret = scnprintf(info + *pos, max_size - *pos, header); 3446 if (!ret) 3447 return 1; 3448 3449 *pos += ret; 3450 3451 list_for_each_entry(cdi, &cdrom_list, list) { 3452 switch (option) { 3453 case CTL_NAME: 3454 ret = scnprintf(info + *pos, max_size - *pos, 3455 "\t%s", cdi->name); 3456 break; 3457 case CTL_SPEED: 3458 ret = scnprintf(info + *pos, max_size - *pos, 3459 "\t%d", cdi->speed); 3460 break; 3461 case CTL_SLOTS: 3462 ret = scnprintf(info + *pos, max_size - *pos, 3463 "\t%d", cdi->capacity); 3464 break; 3465 case CTL_CAPABILITY: 3466 ret = scnprintf(info + *pos, max_size - *pos, 3467 "\t%d", CDROM_CAN(val) != 0); 3468 break; 3469 default: 3470 pr_info("invalid option%d\n", option); 3471 return 1; 3472 } 3473 if (!ret) 3474 return 1; 3475 *pos += ret; 3476 } 3477 3478 return 0; 3479 } 3480 3481 static int cdrom_sysctl_info(struct ctl_table *ctl, int write, 3482 void __user *buffer, size_t *lenp, loff_t *ppos) 3483 { 3484 int pos; 3485 char *info = cdrom_sysctl_settings.info; 3486 const int max_size = sizeof(cdrom_sysctl_settings.info); 3487 3488 if (!*lenp || (*ppos && !write)) { 3489 *lenp = 0; 3490 return 0; 3491 } 3492 3493 mutex_lock(&cdrom_mutex); 3494 3495 pos = sprintf(info, "CD-ROM information, " VERSION "\n"); 3496 3497 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME)) 3498 goto done; 3499 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED)) 3500 goto done; 3501 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS)) 3502 goto done; 3503 if (cdrom_print_info("\nCan close tray:\t", 3504 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY)) 3505 goto done; 3506 if (cdrom_print_info("\nCan open tray:\t", 3507 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY)) 3508 goto done; 3509 if (cdrom_print_info("\nCan lock tray:\t", 3510 CDC_LOCK, info, &pos, CTL_CAPABILITY)) 3511 goto done; 3512 if (cdrom_print_info("\nCan change speed:", 3513 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY)) 3514 goto done; 3515 if (cdrom_print_info("\nCan select disk:", 3516 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY)) 3517 goto done; 3518 if (cdrom_print_info("\nCan read multisession:", 3519 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY)) 3520 goto done; 3521 if (cdrom_print_info("\nCan read MCN:\t", 3522 CDC_MCN, info, &pos, CTL_CAPABILITY)) 3523 goto done; 3524 if (cdrom_print_info("\nReports media changed:", 3525 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY)) 3526 goto done; 3527 if (cdrom_print_info("\nCan play audio:\t", 3528 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY)) 3529 goto done; 3530 if (cdrom_print_info("\nCan write CD-R:\t", 3531 CDC_CD_R, info, &pos, CTL_CAPABILITY)) 3532 goto done; 3533 if (cdrom_print_info("\nCan write CD-RW:", 3534 CDC_CD_RW, info, &pos, CTL_CAPABILITY)) 3535 goto done; 3536 if (cdrom_print_info("\nCan read DVD:\t", 3537 CDC_DVD, info, &pos, CTL_CAPABILITY)) 3538 goto done; 3539 if (cdrom_print_info("\nCan write DVD-R:", 3540 CDC_DVD_R, info, &pos, CTL_CAPABILITY)) 3541 goto done; 3542 if (cdrom_print_info("\nCan write DVD-RAM:", 3543 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY)) 3544 goto done; 3545 if (cdrom_print_info("\nCan read MRW:\t", 3546 CDC_MRW, info, &pos, CTL_CAPABILITY)) 3547 goto done; 3548 if (cdrom_print_info("\nCan write MRW:\t", 3549 CDC_MRW_W, info, &pos, CTL_CAPABILITY)) 3550 goto done; 3551 if (cdrom_print_info("\nCan write RAM:\t", 3552 CDC_RAM, info, &pos, CTL_CAPABILITY)) 3553 goto done; 3554 if (!scnprintf(info + pos, max_size - pos, "\n\n")) 3555 goto done; 3556 doit: 3557 mutex_unlock(&cdrom_mutex); 3558 return proc_dostring(ctl, write, buffer, lenp, ppos); 3559 done: 3560 pr_info("info buffer too small\n"); 3561 goto doit; 3562 } 3563 3564 /* Unfortunately, per device settings are not implemented through 3565 procfs/sysctl yet. When they are, this will naturally disappear. For now 3566 just update all drives. Later this will become the template on which 3567 new registered drives will be based. */ 3568 static void cdrom_update_settings(void) 3569 { 3570 struct cdrom_device_info *cdi; 3571 3572 mutex_lock(&cdrom_mutex); 3573 list_for_each_entry(cdi, &cdrom_list, list) { 3574 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) 3575 cdi->options |= CDO_AUTO_CLOSE; 3576 else if (!autoclose) 3577 cdi->options &= ~CDO_AUTO_CLOSE; 3578 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY)) 3579 cdi->options |= CDO_AUTO_EJECT; 3580 else if (!autoeject) 3581 cdi->options &= ~CDO_AUTO_EJECT; 3582 if (lockdoor && CDROM_CAN(CDC_LOCK)) 3583 cdi->options |= CDO_LOCK; 3584 else if (!lockdoor) 3585 cdi->options &= ~CDO_LOCK; 3586 if (check_media_type) 3587 cdi->options |= CDO_CHECK_TYPE; 3588 else 3589 cdi->options &= ~CDO_CHECK_TYPE; 3590 } 3591 mutex_unlock(&cdrom_mutex); 3592 } 3593 3594 static int cdrom_sysctl_handler(struct ctl_table *ctl, int write, 3595 void __user *buffer, size_t *lenp, loff_t *ppos) 3596 { 3597 int ret; 3598 3599 ret = proc_dointvec(ctl, write, buffer, lenp, ppos); 3600 3601 if (write) { 3602 3603 /* we only care for 1 or 0. */ 3604 autoclose = !!cdrom_sysctl_settings.autoclose; 3605 autoeject = !!cdrom_sysctl_settings.autoeject; 3606 debug = !!cdrom_sysctl_settings.debug; 3607 lockdoor = !!cdrom_sysctl_settings.lock; 3608 check_media_type = !!cdrom_sysctl_settings.check; 3609 3610 /* update the option flags according to the changes. we 3611 don't have per device options through sysctl yet, 3612 but we will have and then this will disappear. */ 3613 cdrom_update_settings(); 3614 } 3615 3616 return ret; 3617 } 3618 3619 /* Place files in /proc/sys/dev/cdrom */ 3620 static struct ctl_table cdrom_table[] = { 3621 { 3622 .procname = "info", 3623 .data = &cdrom_sysctl_settings.info, 3624 .maxlen = CDROM_STR_SIZE, 3625 .mode = 0444, 3626 .proc_handler = cdrom_sysctl_info, 3627 }, 3628 { 3629 .procname = "autoclose", 3630 .data = &cdrom_sysctl_settings.autoclose, 3631 .maxlen = sizeof(int), 3632 .mode = 0644, 3633 .proc_handler = cdrom_sysctl_handler, 3634 }, 3635 { 3636 .procname = "autoeject", 3637 .data = &cdrom_sysctl_settings.autoeject, 3638 .maxlen = sizeof(int), 3639 .mode = 0644, 3640 .proc_handler = cdrom_sysctl_handler, 3641 }, 3642 { 3643 .procname = "debug", 3644 .data = &cdrom_sysctl_settings.debug, 3645 .maxlen = sizeof(int), 3646 .mode = 0644, 3647 .proc_handler = cdrom_sysctl_handler, 3648 }, 3649 { 3650 .procname = "lock", 3651 .data = &cdrom_sysctl_settings.lock, 3652 .maxlen = sizeof(int), 3653 .mode = 0644, 3654 .proc_handler = cdrom_sysctl_handler, 3655 }, 3656 { 3657 .procname = "check_media", 3658 .data = &cdrom_sysctl_settings.check, 3659 .maxlen = sizeof(int), 3660 .mode = 0644, 3661 .proc_handler = cdrom_sysctl_handler 3662 }, 3663 { } 3664 }; 3665 3666 static struct ctl_table cdrom_cdrom_table[] = { 3667 { 3668 .procname = "cdrom", 3669 .maxlen = 0, 3670 .mode = 0555, 3671 .child = cdrom_table, 3672 }, 3673 { } 3674 }; 3675 3676 /* Make sure that /proc/sys/dev is there */ 3677 static struct ctl_table cdrom_root_table[] = { 3678 { 3679 .procname = "dev", 3680 .maxlen = 0, 3681 .mode = 0555, 3682 .child = cdrom_cdrom_table, 3683 }, 3684 { } 3685 }; 3686 static struct ctl_table_header *cdrom_sysctl_header; 3687 3688 static void cdrom_sysctl_register(void) 3689 { 3690 static int initialized; 3691 3692 if (initialized == 1) 3693 return; 3694 3695 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table); 3696 3697 /* set the defaults */ 3698 cdrom_sysctl_settings.autoclose = autoclose; 3699 cdrom_sysctl_settings.autoeject = autoeject; 3700 cdrom_sysctl_settings.debug = debug; 3701 cdrom_sysctl_settings.lock = lockdoor; 3702 cdrom_sysctl_settings.check = check_media_type; 3703 3704 initialized = 1; 3705 } 3706 3707 static void cdrom_sysctl_unregister(void) 3708 { 3709 if (cdrom_sysctl_header) 3710 unregister_sysctl_table(cdrom_sysctl_header); 3711 } 3712 3713 #else /* CONFIG_SYSCTL */ 3714 3715 static void cdrom_sysctl_register(void) 3716 { 3717 } 3718 3719 static void cdrom_sysctl_unregister(void) 3720 { 3721 } 3722 3723 #endif /* CONFIG_SYSCTL */ 3724 3725 static int __init cdrom_init(void) 3726 { 3727 cdrom_sysctl_register(); 3728 3729 return 0; 3730 } 3731 3732 static void __exit cdrom_exit(void) 3733 { 3734 pr_info("Uniform CD-ROM driver unloaded\n"); 3735 cdrom_sysctl_unregister(); 3736 } 3737 3738 module_init(cdrom_init); 3739 module_exit(cdrom_exit); 3740 MODULE_LICENSE("GPL"); 3741