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