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