1 /* linux/drivers/cdrom/cdrom.c 2 Copyright (c) 1996, 1997 David A. van Leeuwen. 3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org> 4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk> 5 6 May be copied or modified under the terms of the GNU General Public 7 License. See linux/COPYING for more information. 8 9 Uniform CD-ROM driver for Linux. 10 See Documentation/cdrom/cdrom-standard.rst for usage information. 11 12 The routines in the file provide a uniform interface between the 13 software that uses CD-ROMs and the various low-level drivers that 14 actually talk to the hardware. Suggestions are welcome. 15 Patches that work are more welcome though. ;-) 16 17 To Do List: 18 ---------------------------------- 19 20 -- Modify sysctl/proc interface. I plan on having one directory per 21 drive, with entries for outputing general drive information, and sysctl 22 based tunable parameters such as whether the tray should auto-close for 23 that drive. Suggestions (or patches) for this welcome! 24 25 26 Revision History 27 ---------------------------------- 28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl> 29 -- Initial version by David A. van Leeuwen. I don't have a detailed 30 changelog for the 1.x series, David? 31 32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org> 33 -- New maintainer! As David A. van Leeuwen has been too busy to actively 34 maintain and improve this driver, I am now carrying on the torch. If 35 you have a problem with this driver, please feel free to contact me. 36 37 -- Added (rudimentary) sysctl interface. I realize this is really weak 38 right now, and is _very_ badly implemented. It will be improved... 39 40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into 41 the Uniform CD-ROM driver via the cdrom_count_tracks function. 42 The cdrom_count_tracks function helps resolve some of the false 43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check 44 for the correct media type when mounting or playing audio from a CD. 45 46 -- Remove the calls to verify_area and only use the copy_from_user and 47 copy_to_user stuff, since these calls now provide their own memory 48 checking with the 2.1.x kernels. 49 50 -- Major update to return codes so that errors from low-level drivers 51 are passed on through (thanks to Gerd Knorr for pointing out this 52 problem). 53 54 -- Made it so if a function isn't implemented in a low-level driver, 55 ENOSYS is now returned instead of EINVAL. 56 57 -- Simplified some complex logic so that the source code is easier to read. 58 59 -- Other stuff I probably forgot to mention (lots of changes). 60 61 2.01 to 2.11 Dec 1997-Jan 1998 62 -- TO-DO! Write changelogs for 2.01 to 2.12. 63 64 2.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org> 65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that 66 copy_*_user does not return EFAULT on error, but instead returns the number 67 of bytes not copied. I was returning whatever non-zero stuff came back from 68 the copy_*_user functions directly, which would result in strange errors. 69 70 2.13 July 17, 1998 -- Erik Andersen <andersee@debian.org> 71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed 72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing 73 this out and providing a simple fix. 74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback. 75 thanks to Andrea Arcangeli 76 -- Fixed it so that the /proc entry now also shows up when cdrom is 77 compiled into the kernel. Before it only worked when loaded as a module. 78 79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org> 80 -- Fixed a bug in cdrom_media_changed and handling of reporting that 81 the media had changed for devices that _don't_ implement media_changed. 82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug. 83 -- Made a few things more pedanticly correct. 84 85 2.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk> 86 -- New maintainers! Erik was too busy to continue the work on the driver, 87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk> 88 will do their best to follow in his footsteps 89 90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk> 91 -- Check if drive is capable of doing what we ask before blindly changing 92 cdi->options in various ioctl. 93 -- Added version to proc entry. 94 95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk> 96 -- Fixed an error in open_for_data where we would sometimes not return 97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>. 98 -- Fixed module usage count - usage was based on /proc/sys/dev 99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other 100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where 101 dev would be removed even though it was used. cdrom.c just illuminated 102 that bug. 103 104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk> 105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has 106 been "rewritten" because capabilities and options aren't in sync. They 107 should be... 108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way. 109 -- Added CDROM_RESET ioctl. 110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly. 111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs 112 from parsing /proc/sys/dev/cdrom/info. 113 114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk> 115 -- Check capability mask from low level driver when counting tracks as 116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>. 117 118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk> 119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of 120 CDC_CLOSE_TRAY. 121 -- proc info didn't mask against capabilities mask. 122 123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk> 124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the 125 code was duplicated before. Drives that support the generic packet 126 interface are now being fed packets from here instead. 127 -- First attempt at adding support for MMC2 commands - for DVD and 128 CD-R(W) drives. Only the DVD parts are in now - the interface used is 129 the same as for the audio ioctls. 130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get 131 a change to perform device specific ioctls as well. 132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities. 133 -- Put in sysctl files for autoclose, autoeject, check_media, debug, 134 and lock. 135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about 136 CD-Rx and DVD capabilities. 137 -- Now default to checking media type. 138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for 139 doing this anyway, with the generic_packet addition. 140 141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk> 142 -- Fix up the sysctl handling so that the option flags get set 143 correctly. 144 -- Fix up ioctl handling so the device specific ones actually get 145 called :). 146 147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk> 148 -- Fixed volume control on SCSI drives (or others with longer audio 149 page). 150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath 151 <andrewtv@usa.net> for telling me and for having defined the various 152 DVD structures and ioctls in the first place! He designed the original 153 DVD patches for ide-cd and while I rearranged and unified them, the 154 interface is still the same. 155 156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk> 157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only 158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left. 159 -- Moved the CDROMREADxxx ioctls in here. 160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls 161 and exported functions. 162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands 163 to now read GPCMD_ for the new generic packet interface. All low level 164 drivers are updated as well. 165 -- Various other cleanups. 166 167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk> 168 -- Fixed a couple of possible memory leaks (if an operation failed and 169 we didn't free the buffer before returning the error). 170 -- Integrated Uniform CD Changer handling from Richard Sharman 171 <rsharman@pobox.com>. 172 -- Defined CD_DVD and CD_CHANGER log levels. 173 -- Fixed the CDROMREADxxx ioctls. 174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few 175 drives supported it. We lose the index part, however. 176 -- Small modifications to accommodate opens of /dev/hdc1, required 177 for ide-cd to handle multisession discs. 178 -- Export cdrom_mode_sense and cdrom_mode_select. 179 -- init_cdrom_command() for setting up a cgc command. 180 181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk> 182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually 183 impossible to send the drive data in a sensible way. 184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and 185 dvd_read_manufact. 186 -- Added setup of write mode for packet writing. 187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of 188 number of frames and split the reads in blocks of 8. 189 190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk> 191 -- Added support for changing the region of DVD drives. 192 -- Added sense data to generic command. 193 194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de> 195 -- Do same "read header length" trick in cdrom_get_disc_info() as 196 we do in cdrom_get_track_info() -- some drive don't obey specs and 197 fail if they can't supply the full Mt Fuji size table. 198 -- Deleted stuff related to setting up write modes. It has a different 199 home now. 200 -- Clear header length in mode_select unconditionally. 201 -- Removed the register_disk() that was added, not needed here. 202 203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de> 204 -- Fix direction flag in setup_send_key and setup_report_key. This 205 gave some SCSI adapters problems. 206 -- Always return -EROFS for write opens 207 -- Convert to module_init/module_exit style init and remove some 208 of the #ifdef MODULE stuff 209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid, 210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and 211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command 212 did not clear a 0 sized buffer. 213 214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de> 215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In 216 that case switch block size and issue plain READ_10 again, then switch 217 back. 218 219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de> 220 -- Fix volume control on CD's - old SCSI-II drives now use their own 221 code, as doing MODE6 stuff in here is really not my intention. 222 -- Use READ_DISC_INFO for more reliable end-of-disc. 223 224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de> 225 -- Fix bug in getting rpc phase 2 region info. 226 -- Reinstate "correct" CDROMPLAYTRKIND 227 228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de> 229 -- Use quiet bit on packet commands not known to work 230 231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de> 232 -- Various fixes and lots of cleanups not listed :-) 233 -- Locking fixes 234 -- Mt Rainier support 235 -- DVD-RAM write open fixes 236 237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov 238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units. 239 240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW 241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se> 242 243 -------------------------------------------------------------------------*/ 244 245 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 246 247 #define REVISION "Revision: 3.20" 248 #define VERSION "Id: cdrom.c 3.20 2003/12/17" 249 250 /* I use an error-log mask to give fine grain control over the type of 251 messages dumped to the system logs. The available masks include: */ 252 #define CD_NOTHING 0x0 253 #define CD_WARNING 0x1 254 #define CD_REG_UNREG 0x2 255 #define CD_DO_IOCTL 0x4 256 #define CD_OPEN 0x8 257 #define CD_CLOSE 0x10 258 #define CD_COUNT_TRACKS 0x20 259 #define CD_CHANGER 0x40 260 #define CD_DVD 0x80 261 262 /* Define this to remove _all_ the debugging messages */ 263 /* #define ERRLOGMASK CD_NOTHING */ 264 #define ERRLOGMASK CD_WARNING 265 /* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */ 266 /* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */ 267 268 #include <linux/atomic.h> 269 #include <linux/module.h> 270 #include <linux/fs.h> 271 #include <linux/major.h> 272 #include <linux/types.h> 273 #include <linux/errno.h> 274 #include <linux/kernel.h> 275 #include <linux/mm.h> 276 #include <linux/slab.h> 277 #include <linux/cdrom.h> 278 #include <linux/sysctl.h> 279 #include <linux/proc_fs.h> 280 #include <linux/blkpg.h> 281 #include <linux/init.h> 282 #include <linux/fcntl.h> 283 #include <linux/blkdev.h> 284 #include <linux/times.h> 285 #include <linux/uaccess.h> 286 #include <scsi/scsi_common.h> 287 288 /* used to tell the module to turn on full debugging messages */ 289 static bool debug; 290 /* default compatibility mode */ 291 static bool autoclose=1; 292 static bool autoeject; 293 static bool lockdoor = 1; 294 /* will we ever get to use this... sigh. */ 295 static bool check_media_type; 296 /* automatically restart mrw format */ 297 static bool mrw_format_restart = 1; 298 module_param(debug, bool, 0); 299 module_param(autoclose, bool, 0); 300 module_param(autoeject, bool, 0); 301 module_param(lockdoor, bool, 0); 302 module_param(check_media_type, bool, 0); 303 module_param(mrw_format_restart, bool, 0); 304 305 static DEFINE_MUTEX(cdrom_mutex); 306 307 static const char *mrw_format_status[] = { 308 "not mrw", 309 "bgformat inactive", 310 "bgformat active", 311 "mrw complete", 312 }; 313 314 static const char *mrw_address_space[] = { "DMA", "GAA" }; 315 316 #if (ERRLOGMASK != CD_NOTHING) 317 #define cd_dbg(type, fmt, ...) \ 318 do { \ 319 if ((ERRLOGMASK & type) || debug == 1) \ 320 pr_debug(fmt, ##__VA_ARGS__); \ 321 } while (0) 322 #else 323 #define cd_dbg(type, fmt, ...) \ 324 do { \ 325 if (0 && (ERRLOGMASK & type) || debug == 1) \ 326 pr_debug(fmt, ##__VA_ARGS__); \ 327 } while (0) 328 #endif 329 330 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in 331 a lot of places. This macro makes the code more clear. */ 332 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type)) 333 334 /* 335 * Another popular OS uses 7 seconds as the hard timeout for default 336 * commands, so it is a good choice for us as well. 337 */ 338 #define CDROM_DEF_TIMEOUT (7 * HZ) 339 340 /* Not-exported routines. */ 341 342 static void cdrom_sysctl_register(void); 343 344 static LIST_HEAD(cdrom_list); 345 346 static void signal_media_change(struct cdrom_device_info *cdi) 347 { 348 cdi->mc_flags = 0x3; /* set media changed bits, on both queues */ 349 cdi->last_media_change_ms = ktime_to_ms(ktime_get()); 350 } 351 352 int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 353 struct packet_command *cgc) 354 { 355 if (cgc->sshdr) { 356 cgc->sshdr->sense_key = 0x05; 357 cgc->sshdr->asc = 0x20; 358 cgc->sshdr->ascq = 0x00; 359 } 360 361 cgc->stat = -EIO; 362 return -EIO; 363 } 364 EXPORT_SYMBOL(cdrom_dummy_generic_packet); 365 366 static int cdrom_flush_cache(struct cdrom_device_info *cdi) 367 { 368 struct packet_command cgc; 369 370 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 371 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 372 373 cgc.timeout = 5 * 60 * HZ; 374 375 return cdi->ops->generic_packet(cdi, &cgc); 376 } 377 378 /* requires CD R/RW */ 379 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, 380 disc_information *di) 381 { 382 const struct cdrom_device_ops *cdo = cdi->ops; 383 struct packet_command cgc; 384 int ret, buflen; 385 386 /* set up command and get the disc info */ 387 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); 388 cgc.cmd[0] = GPCMD_READ_DISC_INFO; 389 cgc.cmd[8] = cgc.buflen = 2; 390 cgc.quiet = 1; 391 392 ret = cdo->generic_packet(cdi, &cgc); 393 if (ret) 394 return ret; 395 396 /* not all drives have the same disc_info length, so requeue 397 * packet with the length the drive tells us it can supply 398 */ 399 buflen = be16_to_cpu(di->disc_information_length) + 400 sizeof(di->disc_information_length); 401 402 if (buflen > sizeof(disc_information)) 403 buflen = sizeof(disc_information); 404 405 cgc.cmd[8] = cgc.buflen = buflen; 406 ret = cdo->generic_packet(cdi, &cgc); 407 if (ret) 408 return ret; 409 410 /* return actual fill size */ 411 return buflen; 412 } 413 414 /* This macro makes sure we don't have to check on cdrom_device_ops 415 * existence in the run-time routines below. Change_capability is a 416 * hack to have the capability flags defined const, while we can still 417 * change it here without gcc complaining at every line. 418 */ 419 #define ENSURE(cdo, call, bits) \ 420 do { \ 421 if (cdo->call == NULL) \ 422 WARN_ON_ONCE((cdo)->capability & (bits)); \ 423 } while (0) 424 425 /* 426 * the first prototypes used 0x2c as the page code for the mrw mode page, 427 * subsequently this was changed to 0x03. probe the one used by this drive 428 */ 429 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi) 430 { 431 struct packet_command cgc; 432 char buffer[16]; 433 434 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 435 436 cgc.timeout = HZ; 437 cgc.quiet = 1; 438 439 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) { 440 cdi->mrw_mode_page = MRW_MODE_PC; 441 return 0; 442 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) { 443 cdi->mrw_mode_page = MRW_MODE_PC_PRE1; 444 return 0; 445 } 446 447 return 1; 448 } 449 450 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write) 451 { 452 struct packet_command cgc; 453 struct mrw_feature_desc *mfd; 454 unsigned char buffer[16]; 455 int ret; 456 457 *write = 0; 458 459 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 460 461 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 462 cgc.cmd[3] = CDF_MRW; 463 cgc.cmd[8] = sizeof(buffer); 464 cgc.quiet = 1; 465 466 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 467 return ret; 468 469 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)]; 470 if (be16_to_cpu(mfd->feature_code) != CDF_MRW) 471 return 1; 472 *write = mfd->write; 473 474 if ((ret = cdrom_mrw_probe_pc(cdi))) { 475 *write = 0; 476 return ret; 477 } 478 479 return 0; 480 } 481 482 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont) 483 { 484 struct packet_command cgc; 485 unsigned char buffer[12]; 486 int ret; 487 488 pr_info("%sstarting format\n", cont ? "Re" : ""); 489 490 /* 491 * FmtData bit set (bit 4), format type is 1 492 */ 493 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE); 494 cgc.cmd[0] = GPCMD_FORMAT_UNIT; 495 cgc.cmd[1] = (1 << 4) | 1; 496 497 cgc.timeout = 5 * 60 * HZ; 498 499 /* 500 * 4 byte format list header, 8 byte format list descriptor 501 */ 502 buffer[1] = 1 << 1; 503 buffer[3] = 8; 504 505 /* 506 * nr_blocks field 507 */ 508 buffer[4] = 0xff; 509 buffer[5] = 0xff; 510 buffer[6] = 0xff; 511 buffer[7] = 0xff; 512 513 buffer[8] = 0x24 << 2; 514 buffer[11] = cont; 515 516 ret = cdi->ops->generic_packet(cdi, &cgc); 517 if (ret) 518 pr_info("bgformat failed\n"); 519 520 return ret; 521 } 522 523 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed) 524 { 525 struct packet_command cgc; 526 527 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 528 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 529 530 /* 531 * Session = 1, Track = 0 532 */ 533 cgc.cmd[1] = !!immed; 534 cgc.cmd[2] = 1 << 1; 535 536 cgc.timeout = 5 * 60 * HZ; 537 538 return cdi->ops->generic_packet(cdi, &cgc); 539 } 540 541 static int cdrom_mrw_exit(struct cdrom_device_info *cdi) 542 { 543 disc_information di; 544 int ret; 545 546 ret = cdrom_get_disc_info(cdi, &di); 547 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type)) 548 return 1; 549 550 ret = 0; 551 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) { 552 pr_info("issuing MRW background format suspend\n"); 553 ret = cdrom_mrw_bgformat_susp(cdi, 0); 554 } 555 556 if (!ret && cdi->media_written) 557 ret = cdrom_flush_cache(cdi); 558 559 return ret; 560 } 561 562 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space) 563 { 564 struct packet_command cgc; 565 struct mode_page_header *mph; 566 char buffer[16]; 567 int ret, offset, size; 568 569 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 570 571 cgc.buffer = buffer; 572 cgc.buflen = sizeof(buffer); 573 574 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0); 575 if (ret) 576 return ret; 577 578 mph = (struct mode_page_header *)buffer; 579 offset = be16_to_cpu(mph->desc_length); 580 size = be16_to_cpu(mph->mode_data_length) + 2; 581 582 buffer[offset + 3] = space; 583 cgc.buflen = size; 584 585 ret = cdrom_mode_select(cdi, &cgc); 586 if (ret) 587 return ret; 588 589 pr_info("%s: mrw address space %s selected\n", 590 cdi->name, mrw_address_space[space]); 591 return 0; 592 } 593 594 int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi) 595 { 596 static char banner_printed; 597 const struct cdrom_device_ops *cdo = cdi->ops; 598 599 cd_dbg(CD_OPEN, "entering register_cdrom\n"); 600 601 if (cdo->open == NULL || cdo->release == NULL) 602 return -EINVAL; 603 if (!banner_printed) { 604 pr_info("Uniform CD-ROM driver " REVISION "\n"); 605 banner_printed = 1; 606 cdrom_sysctl_register(); 607 } 608 609 cdi->disk = disk; 610 disk->cdi = cdi; 611 612 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS); 613 if (cdo->check_events == NULL) 614 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC)); 615 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY); 616 ENSURE(cdo, lock_door, CDC_LOCK); 617 ENSURE(cdo, select_speed, CDC_SELECT_SPEED); 618 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION); 619 ENSURE(cdo, get_mcn, CDC_MCN); 620 ENSURE(cdo, reset, CDC_RESET); 621 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET); 622 cdi->mc_flags = 0; 623 cdi->options = CDO_USE_FFLAGS; 624 cdi->last_media_change_ms = ktime_to_ms(ktime_get()); 625 626 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY)) 627 cdi->options |= (int) CDO_AUTO_CLOSE; 628 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY)) 629 cdi->options |= (int) CDO_AUTO_EJECT; 630 if (lockdoor == 1) 631 cdi->options |= (int) CDO_LOCK; 632 if (check_media_type == 1) 633 cdi->options |= (int) CDO_CHECK_TYPE; 634 635 if (CDROM_CAN(CDC_MRW_W)) 636 cdi->exit = cdrom_mrw_exit; 637 638 if (cdi->ops->read_cdda_bpc) 639 cdi->cdda_method = CDDA_BPC_FULL; 640 else 641 cdi->cdda_method = CDDA_OLD; 642 643 WARN_ON(!cdo->generic_packet); 644 645 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name); 646 mutex_lock(&cdrom_mutex); 647 list_add(&cdi->list, &cdrom_list); 648 mutex_unlock(&cdrom_mutex); 649 return 0; 650 } 651 #undef ENSURE 652 653 void unregister_cdrom(struct cdrom_device_info *cdi) 654 { 655 cd_dbg(CD_OPEN, "entering unregister_cdrom\n"); 656 657 mutex_lock(&cdrom_mutex); 658 list_del(&cdi->list); 659 mutex_unlock(&cdrom_mutex); 660 661 if (cdi->exit) 662 cdi->exit(cdi); 663 664 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name); 665 } 666 667 int cdrom_get_media_event(struct cdrom_device_info *cdi, 668 struct media_event_desc *med) 669 { 670 struct packet_command cgc; 671 unsigned char buffer[8]; 672 struct event_header *eh = (struct event_header *)buffer; 673 674 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 675 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION; 676 cgc.cmd[1] = 1; /* IMMED */ 677 cgc.cmd[4] = 1 << 4; /* media event */ 678 cgc.cmd[8] = sizeof(buffer); 679 cgc.quiet = 1; 680 681 if (cdi->ops->generic_packet(cdi, &cgc)) 682 return 1; 683 684 if (be16_to_cpu(eh->data_len) < sizeof(*med)) 685 return 1; 686 687 if (eh->nea || eh->notification_class != 0x4) 688 return 1; 689 690 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med)); 691 return 0; 692 } 693 694 static int cdrom_get_random_writable(struct cdrom_device_info *cdi, 695 struct rwrt_feature_desc *rfd) 696 { 697 struct packet_command cgc; 698 char buffer[24]; 699 int ret; 700 701 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 702 703 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */ 704 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */ 705 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */ 706 cgc.quiet = 1; 707 708 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 709 return ret; 710 711 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd)); 712 return 0; 713 } 714 715 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi) 716 { 717 struct packet_command cgc; 718 char buffer[16]; 719 __be16 *feature_code; 720 int ret; 721 722 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 723 724 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 725 cgc.cmd[3] = CDF_HWDM; 726 cgc.cmd[8] = sizeof(buffer); 727 cgc.quiet = 1; 728 729 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 730 return ret; 731 732 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)]; 733 if (be16_to_cpu(*feature_code) == CDF_HWDM) 734 return 0; 735 736 return 1; 737 } 738 739 740 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write) 741 { 742 struct rwrt_feature_desc rfd; 743 int ret; 744 745 *write = 0; 746 747 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 748 return ret; 749 750 if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 751 *write = 1; 752 753 return 0; 754 } 755 756 static int cdrom_media_erasable(struct cdrom_device_info *cdi) 757 { 758 disc_information di; 759 int ret; 760 761 ret = cdrom_get_disc_info(cdi, &di); 762 if (ret < 0 || ret < offsetof(typeof(di), n_first_track)) 763 return -1; 764 765 return di.erasable; 766 } 767 768 /* 769 * FIXME: check RO bit 770 */ 771 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi) 772 { 773 int ret = cdrom_media_erasable(cdi); 774 775 /* 776 * allow writable open if media info read worked and media is 777 * erasable, _or_ if it fails since not all drives support it 778 */ 779 if (!ret) 780 return 1; 781 782 return 0; 783 } 784 785 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi) 786 { 787 disc_information di; 788 int ret; 789 790 /* 791 * always reset to DMA lba space on open 792 */ 793 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) { 794 pr_err("failed setting lba address space\n"); 795 return 1; 796 } 797 798 ret = cdrom_get_disc_info(cdi, &di); 799 if (ret < 0 || ret < offsetof(typeof(di),disc_type)) 800 return 1; 801 802 if (!di.erasable) 803 return 1; 804 805 /* 806 * mrw_status 807 * 0 - not MRW formatted 808 * 1 - MRW bgformat started, but not running or complete 809 * 2 - MRW bgformat in progress 810 * 3 - MRW formatting complete 811 */ 812 ret = 0; 813 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]); 814 if (!di.mrw_status) 815 ret = 1; 816 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE && 817 mrw_format_restart) 818 ret = cdrom_mrw_bgformat(cdi, 1); 819 820 return ret; 821 } 822 823 static int mo_open_write(struct cdrom_device_info *cdi) 824 { 825 struct packet_command cgc; 826 char buffer[255]; 827 int ret; 828 829 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ); 830 cgc.quiet = 1; 831 832 /* 833 * obtain write protect information as per 834 * drivers/scsi/sd.c:sd_read_write_protect_flag 835 */ 836 837 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 838 if (ret) 839 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0); 840 if (ret) { 841 cgc.buflen = 255; 842 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 843 } 844 845 /* drive gave us no info, let the user go ahead */ 846 if (ret) 847 return 0; 848 849 return buffer[3] & 0x80; 850 } 851 852 static int cdrom_ram_open_write(struct cdrom_device_info *cdi) 853 { 854 struct rwrt_feature_desc rfd; 855 int ret; 856 857 if ((ret = cdrom_has_defect_mgt(cdi))) 858 return ret; 859 860 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 861 return ret; 862 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 863 ret = !rfd.curr; 864 865 cd_dbg(CD_OPEN, "can open for random write\n"); 866 return ret; 867 } 868 869 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi) 870 { 871 struct packet_command cgc; 872 char buffer[32]; 873 int mmc3_profile; 874 875 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 876 877 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 878 cgc.cmd[1] = 0; 879 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */ 880 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */ 881 cgc.quiet = 1; 882 883 if (cdi->ops->generic_packet(cdi, &cgc)) 884 mmc3_profile = 0xffff; 885 else 886 mmc3_profile = (buffer[6] << 8) | buffer[7]; 887 888 cdi->mmc3_profile = mmc3_profile; 889 } 890 891 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi) 892 { 893 switch (cdi->mmc3_profile) { 894 case 0x12: /* DVD-RAM */ 895 case 0x1A: /* DVD+RW */ 896 case 0x43: /* BD-RE */ 897 return 0; 898 default: 899 return 1; 900 } 901 } 902 903 /* 904 * returns 0 for ok to open write, non-0 to disallow 905 */ 906 static int cdrom_open_write(struct cdrom_device_info *cdi) 907 { 908 int mrw, mrw_write, ram_write; 909 int ret = 1; 910 911 mrw = 0; 912 if (!cdrom_is_mrw(cdi, &mrw_write)) 913 mrw = 1; 914 915 if (CDROM_CAN(CDC_MO_DRIVE)) 916 ram_write = 1; 917 else 918 (void) cdrom_is_random_writable(cdi, &ram_write); 919 920 if (mrw) 921 cdi->mask &= ~CDC_MRW; 922 else 923 cdi->mask |= CDC_MRW; 924 925 if (mrw_write) 926 cdi->mask &= ~CDC_MRW_W; 927 else 928 cdi->mask |= CDC_MRW_W; 929 930 if (ram_write) 931 cdi->mask &= ~CDC_RAM; 932 else 933 cdi->mask |= CDC_RAM; 934 935 if (CDROM_CAN(CDC_MRW_W)) 936 ret = cdrom_mrw_open_write(cdi); 937 else if (CDROM_CAN(CDC_DVD_RAM)) 938 ret = cdrom_dvdram_open_write(cdi); 939 else if (CDROM_CAN(CDC_RAM) && 940 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE)) 941 ret = cdrom_ram_open_write(cdi); 942 else if (CDROM_CAN(CDC_MO_DRIVE)) 943 ret = mo_open_write(cdi); 944 else if (!cdrom_is_dvd_rw(cdi)) 945 ret = 0; 946 947 return ret; 948 } 949 950 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi) 951 { 952 struct packet_command cgc; 953 954 if (cdi->mmc3_profile != 0x1a) { 955 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name); 956 return; 957 } 958 959 if (!cdi->media_written) { 960 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name); 961 return; 962 } 963 964 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name); 965 966 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 967 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 968 cgc.timeout = 30*HZ; 969 cdi->ops->generic_packet(cdi, &cgc); 970 971 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 972 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 973 cgc.timeout = 3000*HZ; 974 cgc.quiet = 1; 975 cdi->ops->generic_packet(cdi, &cgc); 976 977 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 978 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 979 cgc.cmd[2] = 2; /* Close session */ 980 cgc.quiet = 1; 981 cgc.timeout = 3000*HZ; 982 cdi->ops->generic_packet(cdi, &cgc); 983 984 cdi->media_written = 0; 985 } 986 987 static int cdrom_close_write(struct cdrom_device_info *cdi) 988 { 989 #if 0 990 return cdrom_flush_cache(cdi); 991 #else 992 return 0; 993 #endif 994 } 995 996 /* badly broken, I know. Is due for a fixup anytime. */ 997 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks) 998 { 999 struct cdrom_tochdr header; 1000 struct cdrom_tocentry entry; 1001 int ret, i; 1002 tracks->data = 0; 1003 tracks->audio = 0; 1004 tracks->cdi = 0; 1005 tracks->xa = 0; 1006 tracks->error = 0; 1007 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); 1008 1009 if (!CDROM_CAN(CDC_PLAY_AUDIO)) { 1010 tracks->error = CDS_NO_INFO; 1011 return; 1012 } 1013 1014 /* Grab the TOC header so we can see how many tracks there are */ 1015 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 1016 if (ret) { 1017 if (ret == -ENOMEDIUM) 1018 tracks->error = CDS_NO_DISC; 1019 else 1020 tracks->error = CDS_NO_INFO; 1021 return; 1022 } 1023 /* check what type of tracks are on this disc */ 1024 entry.cdte_format = CDROM_MSF; 1025 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) { 1026 entry.cdte_track = i; 1027 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) { 1028 tracks->error = CDS_NO_INFO; 1029 return; 1030 } 1031 if (entry.cdte_ctrl & CDROM_DATA_TRACK) { 1032 if (entry.cdte_format == 0x10) 1033 tracks->cdi++; 1034 else if (entry.cdte_format == 0x20) 1035 tracks->xa++; 1036 else 1037 tracks->data++; 1038 } else { 1039 tracks->audio++; 1040 } 1041 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n", 1042 i, entry.cdte_format, entry.cdte_ctrl); 1043 } 1044 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n", 1045 header.cdth_trk1, tracks->audio, tracks->data, 1046 tracks->cdi, tracks->xa); 1047 } 1048 1049 static 1050 int open_for_data(struct cdrom_device_info *cdi) 1051 { 1052 int ret; 1053 const struct cdrom_device_ops *cdo = cdi->ops; 1054 tracktype tracks; 1055 cd_dbg(CD_OPEN, "entering open_for_data\n"); 1056 /* Check if the driver can report drive status. If it can, we 1057 can do clever things. If it can't, well, we at least tried! */ 1058 if (cdo->drive_status != NULL) { 1059 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1060 cd_dbg(CD_OPEN, "drive_status=%d\n", ret); 1061 if (ret == CDS_TRAY_OPEN) { 1062 cd_dbg(CD_OPEN, "the tray is open...\n"); 1063 /* can/may i close it? */ 1064 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1065 cdi->options & CDO_AUTO_CLOSE) { 1066 cd_dbg(CD_OPEN, "trying to close the tray\n"); 1067 ret=cdo->tray_move(cdi,0); 1068 if (ret) { 1069 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n"); 1070 /* Ignore the error from the low 1071 level driver. We don't care why it 1072 couldn't close the tray. We only care 1073 that there is no disc in the drive, 1074 since that is the _REAL_ problem here.*/ 1075 ret=-ENOMEDIUM; 1076 goto clean_up_and_return; 1077 } 1078 } else { 1079 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n"); 1080 ret=-ENOMEDIUM; 1081 goto clean_up_and_return; 1082 } 1083 /* Ok, the door should be closed now.. Check again */ 1084 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1085 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1086 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n"); 1087 cd_dbg(CD_OPEN, "tray might not contain a medium\n"); 1088 ret=-ENOMEDIUM; 1089 goto clean_up_and_return; 1090 } 1091 cd_dbg(CD_OPEN, "the tray is now closed\n"); 1092 } 1093 /* the door should be closed now, check for the disc */ 1094 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1095 if (ret!=CDS_DISC_OK) { 1096 ret = -ENOMEDIUM; 1097 goto clean_up_and_return; 1098 } 1099 } 1100 cdrom_count_tracks(cdi, &tracks); 1101 if (tracks.error == CDS_NO_DISC) { 1102 cd_dbg(CD_OPEN, "bummer. no disc.\n"); 1103 ret=-ENOMEDIUM; 1104 goto clean_up_and_return; 1105 } 1106 /* CD-Players which don't use O_NONBLOCK, workman 1107 * for example, need bit CDO_CHECK_TYPE cleared! */ 1108 if (tracks.data==0) { 1109 if (cdi->options & CDO_CHECK_TYPE) { 1110 /* give people a warning shot, now that CDO_CHECK_TYPE 1111 is the default case! */ 1112 cd_dbg(CD_OPEN, "bummer. wrong media type.\n"); 1113 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n", 1114 (unsigned int)task_pid_nr(current)); 1115 ret=-EMEDIUMTYPE; 1116 goto clean_up_and_return; 1117 } 1118 else { 1119 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n"); 1120 } 1121 } 1122 1123 cd_dbg(CD_OPEN, "all seems well, opening the devicen"); 1124 1125 /* all seems well, we can open the device */ 1126 ret = cdo->open(cdi, 0); /* open for data */ 1127 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret); 1128 /* After all this careful checking, we shouldn't have problems 1129 opening the device, but we don't want the device locked if 1130 this somehow fails... */ 1131 if (ret) { 1132 cd_dbg(CD_OPEN, "open device failed\n"); 1133 goto clean_up_and_return; 1134 } 1135 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) { 1136 cdo->lock_door(cdi, 1); 1137 cd_dbg(CD_OPEN, "door locked\n"); 1138 } 1139 cd_dbg(CD_OPEN, "device opened successfully\n"); 1140 return ret; 1141 1142 /* Something failed. Try to unlock the drive, because some drivers 1143 (notably ide-cd) lock the drive after every command. This produced 1144 a nasty bug where after mount failed, the drive would remain locked! 1145 This ensures that the drive gets unlocked after a mount fails. This 1146 is a goto to avoid bloating the driver with redundant code. */ 1147 clean_up_and_return: 1148 cd_dbg(CD_OPEN, "open failed\n"); 1149 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1150 cdo->lock_door(cdi, 0); 1151 cd_dbg(CD_OPEN, "door unlocked\n"); 1152 } 1153 return ret; 1154 } 1155 1156 /* We use the open-option O_NONBLOCK to indicate that the 1157 * purpose of opening is only for subsequent ioctl() calls; no device 1158 * integrity checks are performed. 1159 * 1160 * We hope that all cd-player programs will adopt this convention. It 1161 * is in their own interest: device control becomes a lot easier 1162 * this way. 1163 */ 1164 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, 1165 fmode_t mode) 1166 { 1167 int ret; 1168 1169 cd_dbg(CD_OPEN, "entering cdrom_open\n"); 1170 1171 /* if this was a O_NONBLOCK open and we should honor the flags, 1172 * do a quick open without drive/disc integrity checks. */ 1173 cdi->use_count++; 1174 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) { 1175 ret = cdi->ops->open(cdi, 1); 1176 } else { 1177 ret = open_for_data(cdi); 1178 if (ret) 1179 goto err; 1180 if (CDROM_CAN(CDC_GENERIC_PACKET)) 1181 cdrom_mmc3_profile(cdi); 1182 if (mode & FMODE_WRITE) { 1183 ret = -EROFS; 1184 if (cdrom_open_write(cdi)) 1185 goto err_release; 1186 if (!CDROM_CAN(CDC_RAM)) 1187 goto err_release; 1188 ret = 0; 1189 cdi->media_written = 0; 1190 } 1191 } 1192 1193 if (ret) 1194 goto err; 1195 1196 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1197 cdi->name, cdi->use_count); 1198 return 0; 1199 err_release: 1200 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1201 cdi->ops->lock_door(cdi, 0); 1202 cd_dbg(CD_OPEN, "door unlocked\n"); 1203 } 1204 cdi->ops->release(cdi); 1205 err: 1206 cdi->use_count--; 1207 return ret; 1208 } 1209 1210 /* This code is similar to that in open_for_data. The routine is called 1211 whenever an audio play operation is requested. 1212 */ 1213 static int check_for_audio_disc(struct cdrom_device_info *cdi, 1214 const struct cdrom_device_ops *cdo) 1215 { 1216 int ret; 1217 tracktype tracks; 1218 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n"); 1219 if (!(cdi->options & CDO_CHECK_TYPE)) 1220 return 0; 1221 if (cdo->drive_status != NULL) { 1222 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1223 cd_dbg(CD_OPEN, "drive_status=%d\n", ret); 1224 if (ret == CDS_TRAY_OPEN) { 1225 cd_dbg(CD_OPEN, "the tray is open...\n"); 1226 /* can/may i close it? */ 1227 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1228 cdi->options & CDO_AUTO_CLOSE) { 1229 cd_dbg(CD_OPEN, "trying to close the tray\n"); 1230 ret=cdo->tray_move(cdi,0); 1231 if (ret) { 1232 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n"); 1233 /* Ignore the error from the low 1234 level driver. We don't care why it 1235 couldn't close the tray. We only care 1236 that there is no disc in the drive, 1237 since that is the _REAL_ problem here.*/ 1238 return -ENOMEDIUM; 1239 } 1240 } else { 1241 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n"); 1242 return -ENOMEDIUM; 1243 } 1244 /* Ok, the door should be closed now.. Check again */ 1245 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1246 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1247 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n"); 1248 return -ENOMEDIUM; 1249 } 1250 if (ret!=CDS_DISC_OK) { 1251 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n"); 1252 return -EIO; 1253 } 1254 cd_dbg(CD_OPEN, "the tray is now closed\n"); 1255 } 1256 } 1257 cdrom_count_tracks(cdi, &tracks); 1258 if (tracks.error) 1259 return(tracks.error); 1260 1261 if (tracks.audio==0) 1262 return -EMEDIUMTYPE; 1263 1264 return 0; 1265 } 1266 1267 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode) 1268 { 1269 const struct cdrom_device_ops *cdo = cdi->ops; 1270 int opened_for_data; 1271 1272 cd_dbg(CD_CLOSE, "entering cdrom_release\n"); 1273 1274 if (cdi->use_count > 0) 1275 cdi->use_count--; 1276 1277 if (cdi->use_count == 0) { 1278 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", 1279 cdi->name); 1280 cdrom_dvd_rw_close_write(cdi); 1281 1282 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) { 1283 cd_dbg(CD_CLOSE, "Unlocking door!\n"); 1284 cdo->lock_door(cdi, 0); 1285 } 1286 } 1287 1288 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) || 1289 !(mode & FMODE_NDELAY); 1290 1291 /* 1292 * flush cache on last write release 1293 */ 1294 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data) 1295 cdrom_close_write(cdi); 1296 1297 cdo->release(cdi); 1298 if (cdi->use_count == 0) { /* last process that closes dev*/ 1299 if (opened_for_data && 1300 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY)) 1301 cdo->tray_move(cdi, 1); 1302 } 1303 } 1304 1305 static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 1306 struct cdrom_changer_info *buf) 1307 { 1308 struct packet_command cgc; 1309 const struct cdrom_device_ops *cdo = cdi->ops; 1310 int length; 1311 1312 /* 1313 * Sanyo changer isn't spec compliant (doesn't use regular change 1314 * LOAD_UNLOAD command, and it doesn't implement the mech status 1315 * command below 1316 */ 1317 if (cdi->sanyo_slot) { 1318 buf->hdr.nslots = 3; 1319 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot; 1320 for (length = 0; length < 3; length++) { 1321 buf->slots[length].disc_present = 1; 1322 buf->slots[length].change = 0; 1323 } 1324 return 0; 1325 } 1326 1327 length = sizeof(struct cdrom_mechstat_header) + 1328 cdi->capacity * sizeof(struct cdrom_slot); 1329 1330 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ); 1331 cgc.cmd[0] = GPCMD_MECHANISM_STATUS; 1332 cgc.cmd[8] = (length >> 8) & 0xff; 1333 cgc.cmd[9] = length & 0xff; 1334 return cdo->generic_packet(cdi, &cgc); 1335 } 1336 1337 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot) 1338 { 1339 struct cdrom_changer_info *info; 1340 int ret; 1341 1342 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n"); 1343 if (cdi->sanyo_slot) 1344 return CDS_NO_INFO; 1345 1346 info = kmalloc(sizeof(*info), GFP_KERNEL); 1347 if (!info) 1348 return -ENOMEM; 1349 1350 if ((ret = cdrom_read_mech_status(cdi, info))) 1351 goto out_free; 1352 1353 if (info->slots[slot].disc_present) 1354 ret = CDS_DISC_OK; 1355 else 1356 ret = CDS_NO_DISC; 1357 1358 out_free: 1359 kfree(info); 1360 return ret; 1361 } 1362 1363 /* Return the number of slots for an ATAPI/SCSI cdrom, 1364 * return 1 if not a changer. 1365 */ 1366 int cdrom_number_of_slots(struct cdrom_device_info *cdi) 1367 { 1368 int status; 1369 int nslots = 1; 1370 struct cdrom_changer_info *info; 1371 1372 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 1373 /* cdrom_read_mech_status requires a valid value for capacity: */ 1374 cdi->capacity = 0; 1375 1376 info = kmalloc(sizeof(*info), GFP_KERNEL); 1377 if (!info) 1378 return -ENOMEM; 1379 1380 if ((status = cdrom_read_mech_status(cdi, info)) == 0) 1381 nslots = info->hdr.nslots; 1382 1383 kfree(info); 1384 return nslots; 1385 } 1386 1387 1388 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */ 1389 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 1390 { 1391 struct packet_command cgc; 1392 1393 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n"); 1394 if (cdi->sanyo_slot && slot < 0) 1395 return 0; 1396 1397 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 1398 cgc.cmd[0] = GPCMD_LOAD_UNLOAD; 1399 cgc.cmd[4] = 2 + (slot >= 0); 1400 cgc.cmd[8] = slot; 1401 cgc.timeout = 60 * HZ; 1402 1403 /* The Sanyo 3 CD changer uses byte 7 of the 1404 GPCMD_TEST_UNIT_READY to command to switch CDs instead of 1405 using the GPCMD_LOAD_UNLOAD opcode. */ 1406 if (cdi->sanyo_slot && -1 < slot) { 1407 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 1408 cgc.cmd[7] = slot; 1409 cgc.cmd[4] = cgc.cmd[8] = 0; 1410 cdi->sanyo_slot = slot ? slot : 3; 1411 } 1412 1413 return cdi->ops->generic_packet(cdi, &cgc); 1414 } 1415 1416 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot) 1417 { 1418 struct cdrom_changer_info *info; 1419 int curslot; 1420 int ret; 1421 1422 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n"); 1423 if (!CDROM_CAN(CDC_SELECT_DISC)) 1424 return -EDRIVE_CANT_DO_THIS; 1425 1426 if (cdi->ops->check_events) 1427 cdi->ops->check_events(cdi, 0, slot); 1428 1429 if (slot == CDSL_NONE) { 1430 signal_media_change(cdi); 1431 return cdrom_load_unload(cdi, -1); 1432 } 1433 1434 info = kmalloc(sizeof(*info), GFP_KERNEL); 1435 if (!info) 1436 return -ENOMEM; 1437 1438 if ((ret = cdrom_read_mech_status(cdi, info))) { 1439 kfree(info); 1440 return ret; 1441 } 1442 1443 curslot = info->hdr.curslot; 1444 kfree(info); 1445 1446 if (cdi->use_count > 1 || cdi->keeplocked) { 1447 if (slot == CDSL_CURRENT) { 1448 return curslot; 1449 } else { 1450 return -EBUSY; 1451 } 1452 } 1453 1454 /* Specifying CDSL_CURRENT will attempt to load the currnet slot, 1455 which is useful if it had been previously unloaded. 1456 Whether it can or not, it returns the current slot. 1457 Similarly, if slot happens to be the current one, we still 1458 try and load it. */ 1459 if (slot == CDSL_CURRENT) 1460 slot = curslot; 1461 1462 /* set media changed bits on both queues */ 1463 signal_media_change(cdi); 1464 if ((ret = cdrom_load_unload(cdi, slot))) 1465 return ret; 1466 1467 return slot; 1468 } 1469 1470 /* 1471 * As cdrom implements an extra ioctl consumer for media changed 1472 * event, it needs to buffer ->check_events() output, such that event 1473 * is not lost for both the usual VFS and ioctl paths. 1474 * cdi->{vfs|ioctl}_events are used to buffer pending events for each 1475 * path. 1476 * 1477 * XXX: Locking is non-existent. cdi->ops->check_events() can be 1478 * called in parallel and buffering fields are accessed without any 1479 * exclusion. The original media_changed code had the same problem. 1480 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl 1481 * and remove this cruft altogether. It doesn't have much usefulness 1482 * at this point. 1483 */ 1484 static void cdrom_update_events(struct cdrom_device_info *cdi, 1485 unsigned int clearing) 1486 { 1487 unsigned int events; 1488 1489 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT); 1490 cdi->vfs_events |= events; 1491 cdi->ioctl_events |= events; 1492 } 1493 1494 unsigned int cdrom_check_events(struct cdrom_device_info *cdi, 1495 unsigned int clearing) 1496 { 1497 unsigned int events; 1498 1499 cdrom_update_events(cdi, clearing); 1500 events = cdi->vfs_events; 1501 cdi->vfs_events = 0; 1502 return events; 1503 } 1504 EXPORT_SYMBOL(cdrom_check_events); 1505 1506 /* We want to make media_changed accessible to the user through an 1507 * ioctl. The main problem now is that we must double-buffer the 1508 * low-level implementation, to assure that the VFS and the user both 1509 * see a medium change once. 1510 */ 1511 1512 static 1513 int media_changed(struct cdrom_device_info *cdi, int queue) 1514 { 1515 unsigned int mask = (1 << (queue & 1)); 1516 int ret = !!(cdi->mc_flags & mask); 1517 bool changed; 1518 1519 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1520 return ret; 1521 1522 /* changed since last call? */ 1523 BUG_ON(!queue); /* shouldn't be called from VFS path */ 1524 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE); 1525 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE; 1526 cdi->ioctl_events = 0; 1527 1528 if (changed) { 1529 signal_media_change(cdi); 1530 ret |= 1; 1531 cdi->media_written = 0; 1532 } 1533 1534 cdi->mc_flags &= ~mask; /* clear bit */ 1535 return ret; 1536 } 1537 1538 /* Requests to the low-level drivers will /always/ be done in the 1539 following format convention: 1540 1541 CDROM_LBA: all data-related requests. 1542 CDROM_MSF: all audio-related requests. 1543 1544 However, a low-level implementation is allowed to refuse this 1545 request, and return information in its own favorite format. 1546 1547 It doesn't make sense /at all/ to ask for a play_audio in LBA 1548 format, or ask for multi-session info in MSF format. However, for 1549 backward compatibility these format requests will be satisfied, but 1550 the requests to the low-level drivers will be sanitized in the more 1551 meaningful format indicated above. 1552 */ 1553 1554 static 1555 void sanitize_format(union cdrom_addr *addr, 1556 u_char * curr, u_char requested) 1557 { 1558 if (*curr == requested) 1559 return; /* nothing to be done! */ 1560 if (requested == CDROM_LBA) { 1561 addr->lba = (int) addr->msf.frame + 1562 75 * (addr->msf.second - 2 + 60 * addr->msf.minute); 1563 } else { /* CDROM_MSF */ 1564 int lba = addr->lba; 1565 addr->msf.frame = lba % 75; 1566 lba /= 75; 1567 lba += 2; 1568 addr->msf.second = lba % 60; 1569 addr->msf.minute = lba / 60; 1570 } 1571 *curr = requested; 1572 } 1573 1574 void init_cdrom_command(struct packet_command *cgc, void *buf, int len, 1575 int type) 1576 { 1577 memset(cgc, 0, sizeof(struct packet_command)); 1578 if (buf) 1579 memset(buf, 0, len); 1580 cgc->buffer = (char *) buf; 1581 cgc->buflen = len; 1582 cgc->data_direction = type; 1583 cgc->timeout = CDROM_DEF_TIMEOUT; 1584 } 1585 1586 /* DVD handling */ 1587 1588 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) 1589 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) 1590 1591 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type) 1592 { 1593 cgc->cmd[0] = GPCMD_REPORT_KEY; 1594 cgc->cmd[10] = type | (agid << 6); 1595 switch (type) { 1596 case 0: case 8: case 5: { 1597 cgc->buflen = 8; 1598 break; 1599 } 1600 case 1: { 1601 cgc->buflen = 16; 1602 break; 1603 } 1604 case 2: case 4: { 1605 cgc->buflen = 12; 1606 break; 1607 } 1608 } 1609 cgc->cmd[9] = cgc->buflen; 1610 cgc->data_direction = CGC_DATA_READ; 1611 } 1612 1613 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type) 1614 { 1615 cgc->cmd[0] = GPCMD_SEND_KEY; 1616 cgc->cmd[10] = type | (agid << 6); 1617 switch (type) { 1618 case 1: { 1619 cgc->buflen = 16; 1620 break; 1621 } 1622 case 3: { 1623 cgc->buflen = 12; 1624 break; 1625 } 1626 case 6: { 1627 cgc->buflen = 8; 1628 break; 1629 } 1630 } 1631 cgc->cmd[9] = cgc->buflen; 1632 cgc->data_direction = CGC_DATA_WRITE; 1633 } 1634 1635 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai) 1636 { 1637 int ret; 1638 u_char buf[20]; 1639 struct packet_command cgc; 1640 const struct cdrom_device_ops *cdo = cdi->ops; 1641 rpc_state_t rpc_state; 1642 1643 memset(buf, 0, sizeof(buf)); 1644 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ); 1645 1646 switch (ai->type) { 1647 /* LU data send */ 1648 case DVD_LU_SEND_AGID: 1649 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n"); 1650 cgc.quiet = 1; 1651 setup_report_key(&cgc, ai->lsa.agid, 0); 1652 1653 if ((ret = cdo->generic_packet(cdi, &cgc))) 1654 return ret; 1655 1656 ai->lsa.agid = buf[7] >> 6; 1657 /* Returning data, let host change state */ 1658 break; 1659 1660 case DVD_LU_SEND_KEY1: 1661 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n"); 1662 setup_report_key(&cgc, ai->lsk.agid, 2); 1663 1664 if ((ret = cdo->generic_packet(cdi, &cgc))) 1665 return ret; 1666 1667 copy_key(ai->lsk.key, &buf[4]); 1668 /* Returning data, let host change state */ 1669 break; 1670 1671 case DVD_LU_SEND_CHALLENGE: 1672 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n"); 1673 setup_report_key(&cgc, ai->lsc.agid, 1); 1674 1675 if ((ret = cdo->generic_packet(cdi, &cgc))) 1676 return ret; 1677 1678 copy_chal(ai->lsc.chal, &buf[4]); 1679 /* Returning data, let host change state */ 1680 break; 1681 1682 /* Post-auth key */ 1683 case DVD_LU_SEND_TITLE_KEY: 1684 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n"); 1685 cgc.quiet = 1; 1686 setup_report_key(&cgc, ai->lstk.agid, 4); 1687 cgc.cmd[5] = ai->lstk.lba; 1688 cgc.cmd[4] = ai->lstk.lba >> 8; 1689 cgc.cmd[3] = ai->lstk.lba >> 16; 1690 cgc.cmd[2] = ai->lstk.lba >> 24; 1691 1692 if ((ret = cdo->generic_packet(cdi, &cgc))) 1693 return ret; 1694 1695 ai->lstk.cpm = (buf[4] >> 7) & 1; 1696 ai->lstk.cp_sec = (buf[4] >> 6) & 1; 1697 ai->lstk.cgms = (buf[4] >> 4) & 3; 1698 copy_key(ai->lstk.title_key, &buf[5]); 1699 /* Returning data, let host change state */ 1700 break; 1701 1702 case DVD_LU_SEND_ASF: 1703 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n"); 1704 setup_report_key(&cgc, ai->lsasf.agid, 5); 1705 1706 if ((ret = cdo->generic_packet(cdi, &cgc))) 1707 return ret; 1708 1709 ai->lsasf.asf = buf[7] & 1; 1710 break; 1711 1712 /* LU data receive (LU changes state) */ 1713 case DVD_HOST_SEND_CHALLENGE: 1714 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n"); 1715 setup_send_key(&cgc, ai->hsc.agid, 1); 1716 buf[1] = 0xe; 1717 copy_chal(&buf[4], ai->hsc.chal); 1718 1719 if ((ret = cdo->generic_packet(cdi, &cgc))) 1720 return ret; 1721 1722 ai->type = DVD_LU_SEND_KEY1; 1723 break; 1724 1725 case DVD_HOST_SEND_KEY2: 1726 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n"); 1727 setup_send_key(&cgc, ai->hsk.agid, 3); 1728 buf[1] = 0xa; 1729 copy_key(&buf[4], ai->hsk.key); 1730 1731 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1732 ai->type = DVD_AUTH_FAILURE; 1733 return ret; 1734 } 1735 ai->type = DVD_AUTH_ESTABLISHED; 1736 break; 1737 1738 /* Misc */ 1739 case DVD_INVALIDATE_AGID: 1740 cgc.quiet = 1; 1741 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n"); 1742 setup_report_key(&cgc, ai->lsa.agid, 0x3f); 1743 if ((ret = cdo->generic_packet(cdi, &cgc))) 1744 return ret; 1745 break; 1746 1747 /* Get region settings */ 1748 case DVD_LU_SEND_RPC_STATE: 1749 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n"); 1750 setup_report_key(&cgc, 0, 8); 1751 memset(&rpc_state, 0, sizeof(rpc_state_t)); 1752 cgc.buffer = (char *) &rpc_state; 1753 1754 if ((ret = cdo->generic_packet(cdi, &cgc))) 1755 return ret; 1756 1757 ai->lrpcs.type = rpc_state.type_code; 1758 ai->lrpcs.vra = rpc_state.vra; 1759 ai->lrpcs.ucca = rpc_state.ucca; 1760 ai->lrpcs.region_mask = rpc_state.region_mask; 1761 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; 1762 break; 1763 1764 /* Set region settings */ 1765 case DVD_HOST_SEND_RPC_STATE: 1766 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n"); 1767 setup_send_key(&cgc, 0, 6); 1768 buf[1] = 6; 1769 buf[4] = ai->hrpcs.pdrc; 1770 1771 if ((ret = cdo->generic_packet(cdi, &cgc))) 1772 return ret; 1773 break; 1774 1775 default: 1776 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type); 1777 return -ENOTTY; 1778 } 1779 1780 return 0; 1781 } 1782 1783 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s, 1784 struct packet_command *cgc) 1785 { 1786 unsigned char buf[21], *base; 1787 struct dvd_layer *layer; 1788 const struct cdrom_device_ops *cdo = cdi->ops; 1789 int ret, layer_num = s->physical.layer_num; 1790 1791 if (layer_num >= DVD_LAYERS) 1792 return -EINVAL; 1793 1794 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1795 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1796 cgc->cmd[6] = layer_num; 1797 cgc->cmd[7] = s->type; 1798 cgc->cmd[9] = cgc->buflen & 0xff; 1799 1800 /* 1801 * refrain from reporting errors on non-existing layers (mainly) 1802 */ 1803 cgc->quiet = 1; 1804 1805 ret = cdo->generic_packet(cdi, cgc); 1806 if (ret) 1807 return ret; 1808 1809 base = &buf[4]; 1810 layer = &s->physical.layer[layer_num]; 1811 1812 /* 1813 * place the data... really ugly, but at least we won't have to 1814 * worry about endianess in userspace. 1815 */ 1816 memset(layer, 0, sizeof(*layer)); 1817 layer->book_version = base[0] & 0xf; 1818 layer->book_type = base[0] >> 4; 1819 layer->min_rate = base[1] & 0xf; 1820 layer->disc_size = base[1] >> 4; 1821 layer->layer_type = base[2] & 0xf; 1822 layer->track_path = (base[2] >> 4) & 1; 1823 layer->nlayers = (base[2] >> 5) & 3; 1824 layer->track_density = base[3] & 0xf; 1825 layer->linear_density = base[3] >> 4; 1826 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7]; 1827 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11]; 1828 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15]; 1829 layer->bca = base[16] >> 7; 1830 1831 return 0; 1832 } 1833 1834 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s, 1835 struct packet_command *cgc) 1836 { 1837 int ret; 1838 u_char buf[8]; 1839 const struct cdrom_device_ops *cdo = cdi->ops; 1840 1841 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1842 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1843 cgc->cmd[6] = s->copyright.layer_num; 1844 cgc->cmd[7] = s->type; 1845 cgc->cmd[8] = cgc->buflen >> 8; 1846 cgc->cmd[9] = cgc->buflen & 0xff; 1847 1848 ret = cdo->generic_packet(cdi, cgc); 1849 if (ret) 1850 return ret; 1851 1852 s->copyright.cpst = buf[4]; 1853 s->copyright.rmi = buf[5]; 1854 1855 return 0; 1856 } 1857 1858 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s, 1859 struct packet_command *cgc) 1860 { 1861 int ret, size; 1862 u_char *buf; 1863 const struct cdrom_device_ops *cdo = cdi->ops; 1864 1865 size = sizeof(s->disckey.value) + 4; 1866 1867 buf = kmalloc(size, GFP_KERNEL); 1868 if (!buf) 1869 return -ENOMEM; 1870 1871 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1872 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1873 cgc->cmd[7] = s->type; 1874 cgc->cmd[8] = size >> 8; 1875 cgc->cmd[9] = size & 0xff; 1876 cgc->cmd[10] = s->disckey.agid << 6; 1877 1878 ret = cdo->generic_packet(cdi, cgc); 1879 if (!ret) 1880 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value)); 1881 1882 kfree(buf); 1883 return ret; 1884 } 1885 1886 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s, 1887 struct packet_command *cgc) 1888 { 1889 int ret, size = 4 + 188; 1890 u_char *buf; 1891 const struct cdrom_device_ops *cdo = cdi->ops; 1892 1893 buf = kmalloc(size, GFP_KERNEL); 1894 if (!buf) 1895 return -ENOMEM; 1896 1897 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1898 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1899 cgc->cmd[7] = s->type; 1900 cgc->cmd[9] = cgc->buflen & 0xff; 1901 1902 ret = cdo->generic_packet(cdi, cgc); 1903 if (ret) 1904 goto out; 1905 1906 s->bca.len = buf[0] << 8 | buf[1]; 1907 if (s->bca.len < 12 || s->bca.len > 188) { 1908 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n", 1909 s->bca.len); 1910 ret = -EIO; 1911 goto out; 1912 } 1913 memcpy(s->bca.value, &buf[4], s->bca.len); 1914 ret = 0; 1915 out: 1916 kfree(buf); 1917 return ret; 1918 } 1919 1920 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s, 1921 struct packet_command *cgc) 1922 { 1923 int ret = 0, size; 1924 u_char *buf; 1925 const struct cdrom_device_ops *cdo = cdi->ops; 1926 1927 size = sizeof(s->manufact.value) + 4; 1928 1929 buf = kmalloc(size, GFP_KERNEL); 1930 if (!buf) 1931 return -ENOMEM; 1932 1933 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1934 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1935 cgc->cmd[7] = s->type; 1936 cgc->cmd[8] = size >> 8; 1937 cgc->cmd[9] = size & 0xff; 1938 1939 ret = cdo->generic_packet(cdi, cgc); 1940 if (ret) 1941 goto out; 1942 1943 s->manufact.len = buf[0] << 8 | buf[1]; 1944 if (s->manufact.len < 0) { 1945 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n", 1946 s->manufact.len); 1947 ret = -EIO; 1948 } else { 1949 if (s->manufact.len > 2048) { 1950 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n", 1951 s->manufact.len); 1952 s->manufact.len = 2048; 1953 } 1954 memcpy(s->manufact.value, &buf[4], s->manufact.len); 1955 } 1956 1957 out: 1958 kfree(buf); 1959 return ret; 1960 } 1961 1962 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s, 1963 struct packet_command *cgc) 1964 { 1965 switch (s->type) { 1966 case DVD_STRUCT_PHYSICAL: 1967 return dvd_read_physical(cdi, s, cgc); 1968 1969 case DVD_STRUCT_COPYRIGHT: 1970 return dvd_read_copyright(cdi, s, cgc); 1971 1972 case DVD_STRUCT_DISCKEY: 1973 return dvd_read_disckey(cdi, s, cgc); 1974 1975 case DVD_STRUCT_BCA: 1976 return dvd_read_bca(cdi, s, cgc); 1977 1978 case DVD_STRUCT_MANUFACT: 1979 return dvd_read_manufact(cdi, s, cgc); 1980 1981 default: 1982 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n", 1983 s->type); 1984 return -EINVAL; 1985 } 1986 } 1987 1988 int cdrom_mode_sense(struct cdrom_device_info *cdi, 1989 struct packet_command *cgc, 1990 int page_code, int page_control) 1991 { 1992 const struct cdrom_device_ops *cdo = cdi->ops; 1993 1994 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1995 1996 cgc->cmd[0] = GPCMD_MODE_SENSE_10; 1997 cgc->cmd[2] = page_code | (page_control << 6); 1998 cgc->cmd[7] = cgc->buflen >> 8; 1999 cgc->cmd[8] = cgc->buflen & 0xff; 2000 cgc->data_direction = CGC_DATA_READ; 2001 return cdo->generic_packet(cdi, cgc); 2002 } 2003 2004 int cdrom_mode_select(struct cdrom_device_info *cdi, 2005 struct packet_command *cgc) 2006 { 2007 const struct cdrom_device_ops *cdo = cdi->ops; 2008 2009 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 2010 memset(cgc->buffer, 0, 2); 2011 cgc->cmd[0] = GPCMD_MODE_SELECT_10; 2012 cgc->cmd[1] = 0x10; /* PF */ 2013 cgc->cmd[7] = cgc->buflen >> 8; 2014 cgc->cmd[8] = cgc->buflen & 0xff; 2015 cgc->data_direction = CGC_DATA_WRITE; 2016 return cdo->generic_packet(cdi, cgc); 2017 } 2018 2019 static int cdrom_read_subchannel(struct cdrom_device_info *cdi, 2020 struct cdrom_subchnl *subchnl, int mcn) 2021 { 2022 const struct cdrom_device_ops *cdo = cdi->ops; 2023 struct packet_command cgc; 2024 char buffer[32]; 2025 int ret; 2026 2027 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ); 2028 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 2029 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */ 2030 cgc.cmd[2] = 0x40; /* request subQ data */ 2031 cgc.cmd[3] = mcn ? 2 : 1; 2032 cgc.cmd[8] = 16; 2033 2034 if ((ret = cdo->generic_packet(cdi, &cgc))) 2035 return ret; 2036 2037 subchnl->cdsc_audiostatus = cgc.buffer[1]; 2038 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf; 2039 subchnl->cdsc_trk = cgc.buffer[6]; 2040 subchnl->cdsc_ind = cgc.buffer[7]; 2041 2042 if (subchnl->cdsc_format == CDROM_LBA) { 2043 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) | 2044 (cgc.buffer[9] << 16) | 2045 (cgc.buffer[10] << 8) | 2046 (cgc.buffer[11])); 2047 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) | 2048 (cgc.buffer[13] << 16) | 2049 (cgc.buffer[14] << 8) | 2050 (cgc.buffer[15])); 2051 } else { 2052 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13]; 2053 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14]; 2054 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15]; 2055 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9]; 2056 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10]; 2057 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11]; 2058 } 2059 2060 return 0; 2061 } 2062 2063 /* 2064 * Specific READ_10 interface 2065 */ 2066 static int cdrom_read_cd(struct cdrom_device_info *cdi, 2067 struct packet_command *cgc, int lba, 2068 int blocksize, int nblocks) 2069 { 2070 const struct cdrom_device_ops *cdo = cdi->ops; 2071 2072 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2073 cgc->cmd[0] = GPCMD_READ_10; 2074 cgc->cmd[2] = (lba >> 24) & 0xff; 2075 cgc->cmd[3] = (lba >> 16) & 0xff; 2076 cgc->cmd[4] = (lba >> 8) & 0xff; 2077 cgc->cmd[5] = lba & 0xff; 2078 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2079 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2080 cgc->cmd[8] = nblocks & 0xff; 2081 cgc->buflen = blocksize * nblocks; 2082 return cdo->generic_packet(cdi, cgc); 2083 } 2084 2085 /* very generic interface for reading the various types of blocks */ 2086 static int cdrom_read_block(struct cdrom_device_info *cdi, 2087 struct packet_command *cgc, 2088 int lba, int nblocks, int format, int blksize) 2089 { 2090 const struct cdrom_device_ops *cdo = cdi->ops; 2091 2092 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2093 cgc->cmd[0] = GPCMD_READ_CD; 2094 /* expected sector size - cdda,mode1,etc. */ 2095 cgc->cmd[1] = format << 2; 2096 /* starting address */ 2097 cgc->cmd[2] = (lba >> 24) & 0xff; 2098 cgc->cmd[3] = (lba >> 16) & 0xff; 2099 cgc->cmd[4] = (lba >> 8) & 0xff; 2100 cgc->cmd[5] = lba & 0xff; 2101 /* number of blocks */ 2102 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2103 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2104 cgc->cmd[8] = nblocks & 0xff; 2105 cgc->buflen = blksize * nblocks; 2106 2107 /* set the header info returned */ 2108 switch (blksize) { 2109 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break; 2110 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break; 2111 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break; 2112 default : cgc->cmd[9] = 0x10; 2113 } 2114 2115 return cdo->generic_packet(cdi, cgc); 2116 } 2117 2118 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2119 int lba, int nframes) 2120 { 2121 struct packet_command cgc; 2122 int ret = 0; 2123 int nr; 2124 2125 cdi->last_sense = 0; 2126 2127 memset(&cgc, 0, sizeof(cgc)); 2128 2129 /* 2130 * start with will ra.nframes size, back down if alloc fails 2131 */ 2132 nr = nframes; 2133 do { 2134 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL); 2135 if (cgc.buffer) 2136 break; 2137 2138 nr >>= 1; 2139 } while (nr); 2140 2141 if (!nr) 2142 return -ENOMEM; 2143 2144 cgc.data_direction = CGC_DATA_READ; 2145 while (nframes > 0) { 2146 if (nr > nframes) 2147 nr = nframes; 2148 2149 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW); 2150 if (ret) 2151 break; 2152 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) { 2153 ret = -EFAULT; 2154 break; 2155 } 2156 ubuf += CD_FRAMESIZE_RAW * nr; 2157 nframes -= nr; 2158 lba += nr; 2159 } 2160 kfree(cgc.buffer); 2161 return ret; 2162 } 2163 2164 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2165 int lba, int nframes) 2166 { 2167 int max_frames = (queue_max_sectors(cdi->disk->queue) << 9) / 2168 CD_FRAMESIZE_RAW; 2169 int nr, ret = 0; 2170 2171 cdi->last_sense = 0; 2172 2173 while (nframes) { 2174 if (cdi->cdda_method == CDDA_BPC_SINGLE) 2175 nr = 1; 2176 else 2177 nr = min(nframes, max_frames); 2178 2179 ret = cdi->ops->read_cdda_bpc(cdi, ubuf, lba, nr, 2180 &cdi->last_sense); 2181 if (ret) 2182 break; 2183 2184 nframes -= nr; 2185 lba += nr; 2186 ubuf += (nr * CD_FRAMESIZE_RAW); 2187 } 2188 2189 return ret; 2190 } 2191 2192 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2193 int lba, int nframes) 2194 { 2195 int ret; 2196 2197 if (cdi->cdda_method == CDDA_OLD) 2198 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2199 2200 retry: 2201 /* 2202 * for anything else than success and io error, we need to retry 2203 */ 2204 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes); 2205 if (!ret || ret != -EIO) 2206 return ret; 2207 2208 /* 2209 * I've seen drives get sense 4/8/3 udma crc errors on multi 2210 * frame dma, so drop to single frame dma if we need to 2211 */ 2212 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) { 2213 pr_info("dropping to single frame dma\n"); 2214 cdi->cdda_method = CDDA_BPC_SINGLE; 2215 goto retry; 2216 } 2217 2218 /* 2219 * so we have an io error of some sort with multi frame dma. if the 2220 * condition wasn't a hardware error 2221 * problems, not for any error 2222 */ 2223 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b) 2224 return ret; 2225 2226 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense); 2227 cdi->cdda_method = CDDA_OLD; 2228 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2229 } 2230 2231 int cdrom_multisession(struct cdrom_device_info *cdi, 2232 struct cdrom_multisession *info) 2233 { 2234 u8 requested_format; 2235 int ret; 2236 2237 if (!(cdi->ops->capability & CDC_MULTI_SESSION)) 2238 return -ENOSYS; 2239 2240 requested_format = info->addr_format; 2241 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2242 return -EINVAL; 2243 info->addr_format = CDROM_LBA; 2244 2245 ret = cdi->ops->get_last_session(cdi, info); 2246 if (!ret) 2247 sanitize_format(&info->addr, &info->addr_format, 2248 requested_format); 2249 return ret; 2250 } 2251 EXPORT_SYMBOL_GPL(cdrom_multisession); 2252 2253 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi, 2254 void __user *argp) 2255 { 2256 struct cdrom_multisession info; 2257 int ret; 2258 2259 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n"); 2260 2261 if (copy_from_user(&info, argp, sizeof(info))) 2262 return -EFAULT; 2263 ret = cdrom_multisession(cdi, &info); 2264 if (ret) 2265 return ret; 2266 if (copy_to_user(argp, &info, sizeof(info))) 2267 return -EFAULT; 2268 2269 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n"); 2270 return ret; 2271 } 2272 2273 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi) 2274 { 2275 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n"); 2276 2277 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2278 return -ENOSYS; 2279 if (cdi->use_count != 1 || cdi->keeplocked) 2280 return -EBUSY; 2281 if (CDROM_CAN(CDC_LOCK)) { 2282 int ret = cdi->ops->lock_door(cdi, 0); 2283 if (ret) 2284 return ret; 2285 } 2286 2287 return cdi->ops->tray_move(cdi, 1); 2288 } 2289 2290 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi) 2291 { 2292 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n"); 2293 2294 if (!CDROM_CAN(CDC_CLOSE_TRAY)) 2295 return -ENOSYS; 2296 return cdi->ops->tray_move(cdi, 0); 2297 } 2298 2299 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi, 2300 unsigned long arg) 2301 { 2302 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n"); 2303 2304 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2305 return -ENOSYS; 2306 if (cdi->keeplocked) 2307 return -EBUSY; 2308 2309 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT); 2310 if (arg) 2311 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT; 2312 return 0; 2313 } 2314 2315 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, 2316 unsigned long arg) 2317 { 2318 struct cdrom_changer_info *info; 2319 int ret; 2320 2321 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 2322 2323 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2324 return -ENOSYS; 2325 2326 /* cannot select disc or select current disc */ 2327 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) 2328 return media_changed(cdi, 1); 2329 2330 if (arg >= cdi->capacity) 2331 return -EINVAL; 2332 2333 info = kmalloc(sizeof(*info), GFP_KERNEL); 2334 if (!info) 2335 return -ENOMEM; 2336 2337 ret = cdrom_read_mech_status(cdi, info); 2338 if (!ret) 2339 ret = info->slots[arg].change; 2340 kfree(info); 2341 return ret; 2342 } 2343 2344 /* 2345 * Media change detection with timing information. 2346 * 2347 * arg is a pointer to a cdrom_timed_media_change_info struct. 2348 * arg->last_media_change may be set by calling code to signal 2349 * the timestamp (in ms) of the last known media change (by the caller). 2350 * Upon successful return, ioctl call will set arg->last_media_change 2351 * to the latest media change timestamp known by the kernel/driver 2352 * and set arg->has_changed to 1 if that timestamp is more recent 2353 * than the timestamp set by the caller. 2354 */ 2355 static int cdrom_ioctl_timed_media_change(struct cdrom_device_info *cdi, 2356 unsigned long arg) 2357 { 2358 int ret; 2359 struct cdrom_timed_media_change_info __user *info; 2360 struct cdrom_timed_media_change_info tmp_info; 2361 2362 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2363 return -ENOSYS; 2364 2365 info = (struct cdrom_timed_media_change_info __user *)arg; 2366 cd_dbg(CD_DO_IOCTL, "entering CDROM_TIMED_MEDIA_CHANGE\n"); 2367 2368 ret = cdrom_ioctl_media_changed(cdi, CDSL_CURRENT); 2369 if (ret < 0) 2370 return ret; 2371 2372 if (copy_from_user(&tmp_info, info, sizeof(tmp_info)) != 0) 2373 return -EFAULT; 2374 2375 tmp_info.media_flags = 0; 2376 if (tmp_info.last_media_change - cdi->last_media_change_ms < 0) 2377 tmp_info.media_flags |= MEDIA_CHANGED_FLAG; 2378 2379 tmp_info.last_media_change = cdi->last_media_change_ms; 2380 2381 if (copy_to_user(info, &tmp_info, sizeof(*info)) != 0) 2382 return -EFAULT; 2383 2384 return 0; 2385 } 2386 2387 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi, 2388 unsigned long arg) 2389 { 2390 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n"); 2391 2392 /* 2393 * Options need to be in sync with capability. 2394 * Too late for that, so we have to check each one separately. 2395 */ 2396 switch (arg) { 2397 case CDO_USE_FFLAGS: 2398 case CDO_CHECK_TYPE: 2399 break; 2400 case CDO_LOCK: 2401 if (!CDROM_CAN(CDC_LOCK)) 2402 return -ENOSYS; 2403 break; 2404 case 0: 2405 return cdi->options; 2406 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */ 2407 default: 2408 if (!CDROM_CAN(arg)) 2409 return -ENOSYS; 2410 } 2411 cdi->options |= (int) arg; 2412 return cdi->options; 2413 } 2414 2415 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi, 2416 unsigned long arg) 2417 { 2418 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n"); 2419 2420 cdi->options &= ~(int) arg; 2421 return cdi->options; 2422 } 2423 2424 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi, 2425 unsigned long arg) 2426 { 2427 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n"); 2428 2429 if (!CDROM_CAN(CDC_SELECT_SPEED)) 2430 return -ENOSYS; 2431 return cdi->ops->select_speed(cdi, arg); 2432 } 2433 2434 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, 2435 unsigned long arg) 2436 { 2437 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n"); 2438 2439 if (!CDROM_CAN(CDC_SELECT_DISC)) 2440 return -ENOSYS; 2441 2442 if (arg != CDSL_CURRENT && arg != CDSL_NONE) { 2443 if (arg >= cdi->capacity) 2444 return -EINVAL; 2445 } 2446 2447 /* 2448 * ->select_disc is a hook to allow a driver-specific way of 2449 * seleting disc. However, since there is no equivalent hook for 2450 * cdrom_slot_status this may not actually be useful... 2451 */ 2452 if (cdi->ops->select_disc) 2453 return cdi->ops->select_disc(cdi, arg); 2454 2455 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n"); 2456 return cdrom_select_disc(cdi, arg); 2457 } 2458 2459 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi, 2460 struct block_device *bdev) 2461 { 2462 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n"); 2463 2464 if (!capable(CAP_SYS_ADMIN)) 2465 return -EACCES; 2466 if (!CDROM_CAN(CDC_RESET)) 2467 return -ENOSYS; 2468 invalidate_bdev(bdev); 2469 return cdi->ops->reset(cdi); 2470 } 2471 2472 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi, 2473 unsigned long arg) 2474 { 2475 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl"); 2476 2477 if (!CDROM_CAN(CDC_LOCK)) 2478 return -EDRIVE_CANT_DO_THIS; 2479 2480 cdi->keeplocked = arg ? 1 : 0; 2481 2482 /* 2483 * Don't unlock the door on multiple opens by default, but allow 2484 * root to do so. 2485 */ 2486 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN)) 2487 return -EBUSY; 2488 return cdi->ops->lock_door(cdi, arg); 2489 } 2490 2491 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi, 2492 unsigned long arg) 2493 { 2494 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis"); 2495 2496 if (!capable(CAP_SYS_ADMIN)) 2497 return -EACCES; 2498 debug = arg ? 1 : 0; 2499 return debug; 2500 } 2501 2502 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi) 2503 { 2504 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n"); 2505 return (cdi->ops->capability & ~cdi->mask); 2506 } 2507 2508 /* 2509 * The following function is implemented, although very few audio 2510 * discs give Universal Product Code information, which should just be 2511 * the Medium Catalog Number on the box. Note, that the way the code 2512 * is written on the CD is /not/ uniform across all discs! 2513 */ 2514 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi, 2515 void __user *argp) 2516 { 2517 struct cdrom_mcn mcn; 2518 int ret; 2519 2520 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n"); 2521 2522 if (!(cdi->ops->capability & CDC_MCN)) 2523 return -ENOSYS; 2524 ret = cdi->ops->get_mcn(cdi, &mcn); 2525 if (ret) 2526 return ret; 2527 2528 if (copy_to_user(argp, &mcn, sizeof(mcn))) 2529 return -EFAULT; 2530 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n"); 2531 return 0; 2532 } 2533 2534 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi, 2535 unsigned long arg) 2536 { 2537 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n"); 2538 2539 if (!(cdi->ops->capability & CDC_DRIVE_STATUS)) 2540 return -ENOSYS; 2541 if (!CDROM_CAN(CDC_SELECT_DISC) || 2542 (arg == CDSL_CURRENT || arg == CDSL_NONE)) 2543 return cdi->ops->drive_status(cdi, CDSL_CURRENT); 2544 if (arg >= cdi->capacity) 2545 return -EINVAL; 2546 return cdrom_slot_status(cdi, arg); 2547 } 2548 2549 /* 2550 * Ok, this is where problems start. The current interface for the 2551 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that 2552 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this 2553 * is often the case, it is also very common for CDs to have some tracks 2554 * with data, and some tracks with audio. Just because I feel like it, 2555 * I declare the following to be the best way to cope. If the CD has ANY 2556 * data tracks on it, it will be returned as a data CD. If it has any XA 2557 * tracks, I will return it as that. Now I could simplify this interface 2558 * by combining these returns with the above, but this more clearly 2559 * demonstrates the problem with the current interface. Too bad this 2560 * wasn't designed to use bitmasks... -Erik 2561 * 2562 * Well, now we have the option CDS_MIXED: a mixed-type CD. 2563 * User level programmers might feel the ioctl is not very useful. 2564 * ---david 2565 */ 2566 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi) 2567 { 2568 tracktype tracks; 2569 2570 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n"); 2571 2572 cdrom_count_tracks(cdi, &tracks); 2573 if (tracks.error) 2574 return tracks.error; 2575 2576 /* Policy mode on */ 2577 if (tracks.audio > 0) { 2578 if (!tracks.data && !tracks.cdi && !tracks.xa) 2579 return CDS_AUDIO; 2580 else 2581 return CDS_MIXED; 2582 } 2583 2584 if (tracks.cdi > 0) 2585 return CDS_XA_2_2; 2586 if (tracks.xa > 0) 2587 return CDS_XA_2_1; 2588 if (tracks.data > 0) 2589 return CDS_DATA_1; 2590 /* Policy mode off */ 2591 2592 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n"); 2593 return CDS_NO_INFO; 2594 } 2595 2596 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi) 2597 { 2598 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n"); 2599 return cdi->capacity; 2600 } 2601 2602 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi, 2603 void __user *argp) 2604 { 2605 struct cdrom_subchnl q; 2606 u8 requested, back; 2607 int ret; 2608 2609 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/ 2610 2611 if (copy_from_user(&q, argp, sizeof(q))) 2612 return -EFAULT; 2613 2614 requested = q.cdsc_format; 2615 if (requested != CDROM_MSF && requested != CDROM_LBA) 2616 return -EINVAL; 2617 q.cdsc_format = CDROM_MSF; 2618 2619 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q); 2620 if (ret) 2621 return ret; 2622 2623 back = q.cdsc_format; /* local copy */ 2624 sanitize_format(&q.cdsc_absaddr, &back, requested); 2625 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2626 2627 if (copy_to_user(argp, &q, sizeof(q))) 2628 return -EFAULT; 2629 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2630 return 0; 2631 } 2632 2633 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 2634 void __user *argp) 2635 { 2636 struct cdrom_tochdr header; 2637 int ret; 2638 2639 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */ 2640 2641 if (copy_from_user(&header, argp, sizeof(header))) 2642 return -EFAULT; 2643 2644 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 2645 if (ret) 2646 return ret; 2647 2648 if (copy_to_user(argp, &header, sizeof(header))) 2649 return -EFAULT; 2650 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */ 2651 return 0; 2652 } 2653 2654 int cdrom_read_tocentry(struct cdrom_device_info *cdi, 2655 struct cdrom_tocentry *entry) 2656 { 2657 u8 requested_format = entry->cdte_format; 2658 int ret; 2659 2660 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2661 return -EINVAL; 2662 2663 /* make interface to low-level uniform */ 2664 entry->cdte_format = CDROM_MSF; 2665 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, entry); 2666 if (!ret) 2667 sanitize_format(&entry->cdte_addr, &entry->cdte_format, 2668 requested_format); 2669 return ret; 2670 } 2671 EXPORT_SYMBOL_GPL(cdrom_read_tocentry); 2672 2673 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi, 2674 void __user *argp) 2675 { 2676 struct cdrom_tocentry entry; 2677 int ret; 2678 2679 if (copy_from_user(&entry, argp, sizeof(entry))) 2680 return -EFAULT; 2681 ret = cdrom_read_tocentry(cdi, &entry); 2682 if (!ret && copy_to_user(argp, &entry, sizeof(entry))) 2683 return -EFAULT; 2684 return ret; 2685 } 2686 2687 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi, 2688 void __user *argp) 2689 { 2690 struct cdrom_msf msf; 2691 2692 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2693 2694 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2695 return -ENOSYS; 2696 if (copy_from_user(&msf, argp, sizeof(msf))) 2697 return -EFAULT; 2698 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf); 2699 } 2700 2701 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi, 2702 void __user *argp) 2703 { 2704 struct cdrom_ti ti; 2705 int ret; 2706 2707 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n"); 2708 2709 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2710 return -ENOSYS; 2711 if (copy_from_user(&ti, argp, sizeof(ti))) 2712 return -EFAULT; 2713 2714 ret = check_for_audio_disc(cdi, cdi->ops); 2715 if (ret) 2716 return ret; 2717 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti); 2718 } 2719 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi, 2720 void __user *argp) 2721 { 2722 struct cdrom_volctrl volume; 2723 2724 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n"); 2725 2726 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2727 return -ENOSYS; 2728 if (copy_from_user(&volume, argp, sizeof(volume))) 2729 return -EFAULT; 2730 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume); 2731 } 2732 2733 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi, 2734 void __user *argp) 2735 { 2736 struct cdrom_volctrl volume; 2737 int ret; 2738 2739 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n"); 2740 2741 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2742 return -ENOSYS; 2743 2744 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume); 2745 if (ret) 2746 return ret; 2747 2748 if (copy_to_user(argp, &volume, sizeof(volume))) 2749 return -EFAULT; 2750 return 0; 2751 } 2752 2753 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi, 2754 unsigned int cmd) 2755 { 2756 int ret; 2757 2758 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n"); 2759 2760 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2761 return -ENOSYS; 2762 ret = check_for_audio_disc(cdi, cdi->ops); 2763 if (ret) 2764 return ret; 2765 return cdi->ops->audio_ioctl(cdi, cmd, NULL); 2766 } 2767 2768 /* 2769 * Required when we need to use READ_10 to issue other than 2048 block 2770 * reads 2771 */ 2772 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size) 2773 { 2774 const struct cdrom_device_ops *cdo = cdi->ops; 2775 struct packet_command cgc; 2776 struct modesel_head mh; 2777 2778 memset(&mh, 0, sizeof(mh)); 2779 mh.block_desc_length = 0x08; 2780 mh.block_length_med = (size >> 8) & 0xff; 2781 mh.block_length_lo = size & 0xff; 2782 2783 memset(&cgc, 0, sizeof(cgc)); 2784 cgc.cmd[0] = 0x15; 2785 cgc.cmd[1] = 1 << 4; 2786 cgc.cmd[4] = 12; 2787 cgc.buflen = sizeof(mh); 2788 cgc.buffer = (char *) &mh; 2789 cgc.data_direction = CGC_DATA_WRITE; 2790 mh.block_desc_length = 0x08; 2791 mh.block_length_med = (size >> 8) & 0xff; 2792 mh.block_length_lo = size & 0xff; 2793 2794 return cdo->generic_packet(cdi, &cgc); 2795 } 2796 2797 static int cdrom_get_track_info(struct cdrom_device_info *cdi, 2798 __u16 track, __u8 type, track_information *ti) 2799 { 2800 const struct cdrom_device_ops *cdo = cdi->ops; 2801 struct packet_command cgc; 2802 int ret, buflen; 2803 2804 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ); 2805 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO; 2806 cgc.cmd[1] = type & 3; 2807 cgc.cmd[4] = (track & 0xff00) >> 8; 2808 cgc.cmd[5] = track & 0xff; 2809 cgc.cmd[8] = 8; 2810 cgc.quiet = 1; 2811 2812 ret = cdo->generic_packet(cdi, &cgc); 2813 if (ret) 2814 return ret; 2815 2816 buflen = be16_to_cpu(ti->track_information_length) + 2817 sizeof(ti->track_information_length); 2818 2819 if (buflen > sizeof(track_information)) 2820 buflen = sizeof(track_information); 2821 2822 cgc.cmd[8] = cgc.buflen = buflen; 2823 ret = cdo->generic_packet(cdi, &cgc); 2824 if (ret) 2825 return ret; 2826 2827 /* return actual fill size */ 2828 return buflen; 2829 } 2830 2831 /* return the last written block on the CD-R media. this is for the udf 2832 file system. */ 2833 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) 2834 { 2835 struct cdrom_tocentry toc; 2836 disc_information di; 2837 track_information ti; 2838 __u32 last_track; 2839 int ret = -1, ti_size; 2840 2841 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 2842 goto use_toc; 2843 2844 ret = cdrom_get_disc_info(cdi, &di); 2845 if (ret < (int)(offsetof(typeof(di), last_track_lsb) 2846 + sizeof(di.last_track_lsb))) 2847 goto use_toc; 2848 2849 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 2850 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 2851 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2852 if (ti_size < (int)offsetof(typeof(ti), track_start)) 2853 goto use_toc; 2854 2855 /* if this track is blank, try the previous. */ 2856 if (ti.blank) { 2857 if (last_track == 1) 2858 goto use_toc; 2859 last_track--; 2860 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2861 } 2862 2863 if (ti_size < (int)(offsetof(typeof(ti), track_size) 2864 + sizeof(ti.track_size))) 2865 goto use_toc; 2866 2867 /* if last recorded field is valid, return it. */ 2868 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address) 2869 + sizeof(ti.last_rec_address))) { 2870 *last_written = be32_to_cpu(ti.last_rec_address); 2871 } else { 2872 /* make it up instead */ 2873 *last_written = be32_to_cpu(ti.track_start) + 2874 be32_to_cpu(ti.track_size); 2875 if (ti.free_blocks) 2876 *last_written -= (be32_to_cpu(ti.free_blocks) + 7); 2877 } 2878 return 0; 2879 2880 /* this is where we end up if the drive either can't do a 2881 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if 2882 it doesn't give enough information or fails. then we return 2883 the toc contents. */ 2884 use_toc: 2885 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2886 return -ENOSYS; 2887 2888 toc.cdte_format = CDROM_MSF; 2889 toc.cdte_track = CDROM_LEADOUT; 2890 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) 2891 return ret; 2892 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA); 2893 *last_written = toc.cdte_addr.lba; 2894 return 0; 2895 } 2896 2897 /* return the next writable block. also for udf file system. */ 2898 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, 2899 long *next_writable) 2900 { 2901 disc_information di; 2902 track_information ti; 2903 __u16 last_track; 2904 int ret, ti_size; 2905 2906 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 2907 goto use_last_written; 2908 2909 ret = cdrom_get_disc_info(cdi, &di); 2910 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb) 2911 + sizeof(di.last_track_lsb)) 2912 goto use_last_written; 2913 2914 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 2915 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 2916 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2917 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start)) 2918 goto use_last_written; 2919 2920 /* if this track is blank, try the previous. */ 2921 if (ti.blank) { 2922 if (last_track == 1) 2923 goto use_last_written; 2924 last_track--; 2925 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 2926 if (ti_size < 0) 2927 goto use_last_written; 2928 } 2929 2930 /* if next recordable address field is valid, use it. */ 2931 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable) 2932 + sizeof(ti.next_writable)) { 2933 *next_writable = be32_to_cpu(ti.next_writable); 2934 return 0; 2935 } 2936 2937 use_last_written: 2938 ret = cdrom_get_last_written(cdi, next_writable); 2939 if (ret) { 2940 *next_writable = 0; 2941 return ret; 2942 } else { 2943 *next_writable += 7; 2944 return 0; 2945 } 2946 } 2947 2948 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi, 2949 void __user *arg, 2950 struct packet_command *cgc, 2951 int cmd) 2952 { 2953 struct scsi_sense_hdr sshdr; 2954 struct cdrom_msf msf; 2955 int blocksize = 0, format = 0, lba; 2956 int ret; 2957 2958 switch (cmd) { 2959 case CDROMREADRAW: 2960 blocksize = CD_FRAMESIZE_RAW; 2961 break; 2962 case CDROMREADMODE1: 2963 blocksize = CD_FRAMESIZE; 2964 format = 2; 2965 break; 2966 case CDROMREADMODE2: 2967 blocksize = CD_FRAMESIZE_RAW0; 2968 break; 2969 } 2970 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf))) 2971 return -EFAULT; 2972 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0); 2973 /* FIXME: we need upper bound checking, too!! */ 2974 if (lba < 0) 2975 return -EINVAL; 2976 2977 cgc->buffer = kzalloc(blocksize, GFP_KERNEL); 2978 if (cgc->buffer == NULL) 2979 return -ENOMEM; 2980 2981 memset(&sshdr, 0, sizeof(sshdr)); 2982 cgc->sshdr = &sshdr; 2983 cgc->data_direction = CGC_DATA_READ; 2984 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize); 2985 if (ret && sshdr.sense_key == 0x05 && 2986 sshdr.asc == 0x20 && 2987 sshdr.ascq == 0x00) { 2988 /* 2989 * SCSI-II devices are not required to support 2990 * READ_CD, so let's try switching block size 2991 */ 2992 if (blocksize != CD_FRAMESIZE) { 2993 ret = cdrom_switch_blocksize(cdi, blocksize); 2994 if (ret) 2995 goto out; 2996 } 2997 cgc->sshdr = NULL; 2998 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1); 2999 if (blocksize != CD_FRAMESIZE) 3000 ret |= cdrom_switch_blocksize(cdi, CD_FRAMESIZE); 3001 } 3002 if (!ret && copy_to_user(arg, cgc->buffer, blocksize)) 3003 ret = -EFAULT; 3004 out: 3005 kfree(cgc->buffer); 3006 return ret; 3007 } 3008 3009 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi, 3010 void __user *arg) 3011 { 3012 struct cdrom_read_audio ra; 3013 int lba; 3014 3015 #ifdef CONFIG_COMPAT 3016 if (in_compat_syscall()) { 3017 struct compat_cdrom_read_audio { 3018 union cdrom_addr addr; 3019 u8 addr_format; 3020 compat_int_t nframes; 3021 compat_caddr_t buf; 3022 } ra32; 3023 3024 if (copy_from_user(&ra32, arg, sizeof(ra32))) 3025 return -EFAULT; 3026 3027 ra = (struct cdrom_read_audio) { 3028 .addr = ra32.addr, 3029 .addr_format = ra32.addr_format, 3030 .nframes = ra32.nframes, 3031 .buf = compat_ptr(ra32.buf), 3032 }; 3033 } else 3034 #endif 3035 { 3036 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg, 3037 sizeof(ra))) 3038 return -EFAULT; 3039 } 3040 3041 if (ra.addr_format == CDROM_MSF) 3042 lba = msf_to_lba(ra.addr.msf.minute, 3043 ra.addr.msf.second, 3044 ra.addr.msf.frame); 3045 else if (ra.addr_format == CDROM_LBA) 3046 lba = ra.addr.lba; 3047 else 3048 return -EINVAL; 3049 3050 /* FIXME: we need upper bound checking, too!! */ 3051 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES) 3052 return -EINVAL; 3053 3054 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes); 3055 } 3056 3057 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi, 3058 void __user *arg) 3059 { 3060 int ret; 3061 struct cdrom_subchnl q; 3062 u_char requested, back; 3063 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q))) 3064 return -EFAULT; 3065 requested = q.cdsc_format; 3066 if (!((requested == CDROM_MSF) || 3067 (requested == CDROM_LBA))) 3068 return -EINVAL; 3069 3070 ret = cdrom_read_subchannel(cdi, &q, 0); 3071 if (ret) 3072 return ret; 3073 back = q.cdsc_format; /* local copy */ 3074 sanitize_format(&q.cdsc_absaddr, &back, requested); 3075 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 3076 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q))) 3077 return -EFAULT; 3078 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 3079 return 0; 3080 } 3081 3082 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi, 3083 void __user *arg, 3084 struct packet_command *cgc) 3085 { 3086 const struct cdrom_device_ops *cdo = cdi->ops; 3087 struct cdrom_msf msf; 3088 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 3089 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf))) 3090 return -EFAULT; 3091 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF; 3092 cgc->cmd[3] = msf.cdmsf_min0; 3093 cgc->cmd[4] = msf.cdmsf_sec0; 3094 cgc->cmd[5] = msf.cdmsf_frame0; 3095 cgc->cmd[6] = msf.cdmsf_min1; 3096 cgc->cmd[7] = msf.cdmsf_sec1; 3097 cgc->cmd[8] = msf.cdmsf_frame1; 3098 cgc->data_direction = CGC_DATA_NONE; 3099 return cdo->generic_packet(cdi, cgc); 3100 } 3101 3102 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi, 3103 void __user *arg, 3104 struct packet_command *cgc) 3105 { 3106 const struct cdrom_device_ops *cdo = cdi->ops; 3107 struct cdrom_blk blk; 3108 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n"); 3109 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk))) 3110 return -EFAULT; 3111 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10; 3112 cgc->cmd[2] = (blk.from >> 24) & 0xff; 3113 cgc->cmd[3] = (blk.from >> 16) & 0xff; 3114 cgc->cmd[4] = (blk.from >> 8) & 0xff; 3115 cgc->cmd[5] = blk.from & 0xff; 3116 cgc->cmd[7] = (blk.len >> 8) & 0xff; 3117 cgc->cmd[8] = blk.len & 0xff; 3118 cgc->data_direction = CGC_DATA_NONE; 3119 return cdo->generic_packet(cdi, cgc); 3120 } 3121 3122 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi, 3123 void __user *arg, 3124 struct packet_command *cgc, 3125 unsigned int cmd) 3126 { 3127 struct cdrom_volctrl volctrl; 3128 unsigned char buffer[32]; 3129 char mask[sizeof(buffer)]; 3130 unsigned short offset; 3131 int ret; 3132 3133 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n"); 3134 3135 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg, 3136 sizeof(volctrl))) 3137 return -EFAULT; 3138 3139 cgc->buffer = buffer; 3140 cgc->buflen = 24; 3141 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0); 3142 if (ret) 3143 return ret; 3144 3145 /* originally the code depended on buffer[1] to determine 3146 how much data is available for transfer. buffer[1] is 3147 unfortunately ambigious and the only reliable way seem 3148 to be to simply skip over the block descriptor... */ 3149 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6)); 3150 3151 if (offset + 16 > sizeof(buffer)) 3152 return -E2BIG; 3153 3154 if (offset + 16 > cgc->buflen) { 3155 cgc->buflen = offset + 16; 3156 ret = cdrom_mode_sense(cdi, cgc, 3157 GPMODE_AUDIO_CTL_PAGE, 0); 3158 if (ret) 3159 return ret; 3160 } 3161 3162 /* sanity check */ 3163 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE || 3164 buffer[offset + 1] < 14) 3165 return -EINVAL; 3166 3167 /* now we have the current volume settings. if it was only 3168 a CDROMVOLREAD, return these values */ 3169 if (cmd == CDROMVOLREAD) { 3170 volctrl.channel0 = buffer[offset+9]; 3171 volctrl.channel1 = buffer[offset+11]; 3172 volctrl.channel2 = buffer[offset+13]; 3173 volctrl.channel3 = buffer[offset+15]; 3174 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl, 3175 sizeof(volctrl))) 3176 return -EFAULT; 3177 return 0; 3178 } 3179 3180 /* get the volume mask */ 3181 cgc->buffer = mask; 3182 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1); 3183 if (ret) 3184 return ret; 3185 3186 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9]; 3187 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11]; 3188 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13]; 3189 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15]; 3190 3191 /* set volume */ 3192 cgc->buffer = buffer + offset - 8; 3193 memset(cgc->buffer, 0, 8); 3194 return cdrom_mode_select(cdi, cgc); 3195 } 3196 3197 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi, 3198 struct packet_command *cgc, 3199 int cmd) 3200 { 3201 const struct cdrom_device_ops *cdo = cdi->ops; 3202 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n"); 3203 cgc->cmd[0] = GPCMD_START_STOP_UNIT; 3204 cgc->cmd[1] = 1; 3205 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0; 3206 cgc->data_direction = CGC_DATA_NONE; 3207 return cdo->generic_packet(cdi, cgc); 3208 } 3209 3210 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi, 3211 struct packet_command *cgc, 3212 int cmd) 3213 { 3214 const struct cdrom_device_ops *cdo = cdi->ops; 3215 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n"); 3216 cgc->cmd[0] = GPCMD_PAUSE_RESUME; 3217 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0; 3218 cgc->data_direction = CGC_DATA_NONE; 3219 return cdo->generic_packet(cdi, cgc); 3220 } 3221 3222 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi, 3223 void __user *arg, 3224 struct packet_command *cgc) 3225 { 3226 int ret; 3227 dvd_struct *s; 3228 int size = sizeof(dvd_struct); 3229 3230 if (!CDROM_CAN(CDC_DVD)) 3231 return -ENOSYS; 3232 3233 s = memdup_user(arg, size); 3234 if (IS_ERR(s)) 3235 return PTR_ERR(s); 3236 3237 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 3238 3239 ret = dvd_read_struct(cdi, s, cgc); 3240 if (ret) 3241 goto out; 3242 3243 if (copy_to_user(arg, s, size)) 3244 ret = -EFAULT; 3245 out: 3246 kfree(s); 3247 return ret; 3248 } 3249 3250 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi, 3251 void __user *arg) 3252 { 3253 int ret; 3254 dvd_authinfo ai; 3255 if (!CDROM_CAN(CDC_DVD)) 3256 return -ENOSYS; 3257 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n"); 3258 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai))) 3259 return -EFAULT; 3260 ret = dvd_do_auth(cdi, &ai); 3261 if (ret) 3262 return ret; 3263 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai))) 3264 return -EFAULT; 3265 return 0; 3266 } 3267 3268 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi, 3269 void __user *arg) 3270 { 3271 int ret; 3272 long next = 0; 3273 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 3274 ret = cdrom_get_next_writable(cdi, &next); 3275 if (ret) 3276 return ret; 3277 if (copy_to_user((long __user *)arg, &next, sizeof(next))) 3278 return -EFAULT; 3279 return 0; 3280 } 3281 3282 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi, 3283 void __user *arg) 3284 { 3285 int ret; 3286 long last = 0; 3287 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 3288 ret = cdrom_get_last_written(cdi, &last); 3289 if (ret) 3290 return ret; 3291 if (in_compat_syscall()) 3292 return put_user(last, (__s32 __user *)arg); 3293 3294 return put_user(last, (long __user *)arg); 3295 } 3296 3297 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 3298 unsigned long arg) 3299 { 3300 struct packet_command cgc; 3301 void __user *userptr = (void __user *)arg; 3302 3303 memset(&cgc, 0, sizeof(cgc)); 3304 3305 /* build a unified command and queue it through 3306 cdo->generic_packet() */ 3307 switch (cmd) { 3308 case CDROMREADRAW: 3309 case CDROMREADMODE1: 3310 case CDROMREADMODE2: 3311 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd); 3312 case CDROMREADAUDIO: 3313 return mmc_ioctl_cdrom_read_audio(cdi, userptr); 3314 case CDROMSUBCHNL: 3315 return mmc_ioctl_cdrom_subchannel(cdi, userptr); 3316 case CDROMPLAYMSF: 3317 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc); 3318 case CDROMPLAYBLK: 3319 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc); 3320 case CDROMVOLCTRL: 3321 case CDROMVOLREAD: 3322 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd); 3323 case CDROMSTART: 3324 case CDROMSTOP: 3325 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd); 3326 case CDROMPAUSE: 3327 case CDROMRESUME: 3328 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd); 3329 case DVD_READ_STRUCT: 3330 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc); 3331 case DVD_AUTH: 3332 return mmc_ioctl_dvd_auth(cdi, userptr); 3333 case CDROM_NEXT_WRITABLE: 3334 return mmc_ioctl_cdrom_next_writable(cdi, userptr); 3335 case CDROM_LAST_WRITTEN: 3336 return mmc_ioctl_cdrom_last_written(cdi, userptr); 3337 } 3338 3339 return -ENOTTY; 3340 } 3341 3342 /* 3343 * Just about every imaginable ioctl is supported in the Uniform layer 3344 * these days. 3345 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl(). 3346 */ 3347 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, 3348 fmode_t mode, unsigned int cmd, unsigned long arg) 3349 { 3350 void __user *argp = (void __user *)arg; 3351 int ret; 3352 3353 switch (cmd) { 3354 case CDROMMULTISESSION: 3355 return cdrom_ioctl_multisession(cdi, argp); 3356 case CDROMEJECT: 3357 return cdrom_ioctl_eject(cdi); 3358 case CDROMCLOSETRAY: 3359 return cdrom_ioctl_closetray(cdi); 3360 case CDROMEJECT_SW: 3361 return cdrom_ioctl_eject_sw(cdi, arg); 3362 case CDROM_MEDIA_CHANGED: 3363 return cdrom_ioctl_media_changed(cdi, arg); 3364 case CDROM_TIMED_MEDIA_CHANGE: 3365 return cdrom_ioctl_timed_media_change(cdi, arg); 3366 case CDROM_SET_OPTIONS: 3367 return cdrom_ioctl_set_options(cdi, arg); 3368 case CDROM_CLEAR_OPTIONS: 3369 return cdrom_ioctl_clear_options(cdi, arg); 3370 case CDROM_SELECT_SPEED: 3371 return cdrom_ioctl_select_speed(cdi, arg); 3372 case CDROM_SELECT_DISC: 3373 return cdrom_ioctl_select_disc(cdi, arg); 3374 case CDROMRESET: 3375 return cdrom_ioctl_reset(cdi, bdev); 3376 case CDROM_LOCKDOOR: 3377 return cdrom_ioctl_lock_door(cdi, arg); 3378 case CDROM_DEBUG: 3379 return cdrom_ioctl_debug(cdi, arg); 3380 case CDROM_GET_CAPABILITY: 3381 return cdrom_ioctl_get_capability(cdi); 3382 case CDROM_GET_MCN: 3383 return cdrom_ioctl_get_mcn(cdi, argp); 3384 case CDROM_DRIVE_STATUS: 3385 return cdrom_ioctl_drive_status(cdi, arg); 3386 case CDROM_DISC_STATUS: 3387 return cdrom_ioctl_disc_status(cdi); 3388 case CDROM_CHANGER_NSLOTS: 3389 return cdrom_ioctl_changer_nslots(cdi); 3390 } 3391 3392 /* 3393 * Use the ioctls that are implemented through the generic_packet() 3394 * interface. this may look at bit funny, but if -ENOTTY is 3395 * returned that particular ioctl is not implemented and we 3396 * let it go through the device specific ones. 3397 */ 3398 if (CDROM_CAN(CDC_GENERIC_PACKET)) { 3399 ret = mmc_ioctl(cdi, cmd, arg); 3400 if (ret != -ENOTTY) 3401 return ret; 3402 } 3403 3404 /* 3405 * Note: most of the cd_dbg() calls are commented out here, 3406 * because they fill up the sys log when CD players poll 3407 * the drive. 3408 */ 3409 switch (cmd) { 3410 case CDROMSUBCHNL: 3411 return cdrom_ioctl_get_subchnl(cdi, argp); 3412 case CDROMREADTOCHDR: 3413 return cdrom_ioctl_read_tochdr(cdi, argp); 3414 case CDROMREADTOCENTRY: 3415 return cdrom_ioctl_read_tocentry(cdi, argp); 3416 case CDROMPLAYMSF: 3417 return cdrom_ioctl_play_msf(cdi, argp); 3418 case CDROMPLAYTRKIND: 3419 return cdrom_ioctl_play_trkind(cdi, argp); 3420 case CDROMVOLCTRL: 3421 return cdrom_ioctl_volctrl(cdi, argp); 3422 case CDROMVOLREAD: 3423 return cdrom_ioctl_volread(cdi, argp); 3424 case CDROMSTART: 3425 case CDROMSTOP: 3426 case CDROMPAUSE: 3427 case CDROMRESUME: 3428 return cdrom_ioctl_audioctl(cdi, cmd); 3429 } 3430 3431 return -ENOSYS; 3432 } 3433 3434 EXPORT_SYMBOL(cdrom_get_last_written); 3435 EXPORT_SYMBOL(register_cdrom); 3436 EXPORT_SYMBOL(unregister_cdrom); 3437 EXPORT_SYMBOL(cdrom_open); 3438 EXPORT_SYMBOL(cdrom_release); 3439 EXPORT_SYMBOL(cdrom_ioctl); 3440 EXPORT_SYMBOL(cdrom_number_of_slots); 3441 EXPORT_SYMBOL(cdrom_mode_select); 3442 EXPORT_SYMBOL(cdrom_mode_sense); 3443 EXPORT_SYMBOL(init_cdrom_command); 3444 EXPORT_SYMBOL(cdrom_get_media_event); 3445 3446 #ifdef CONFIG_SYSCTL 3447 3448 #define CDROM_STR_SIZE 1000 3449 3450 static struct cdrom_sysctl_settings { 3451 char info[CDROM_STR_SIZE]; /* general info */ 3452 int autoclose; /* close tray upon mount, etc */ 3453 int autoeject; /* eject on umount */ 3454 int debug; /* turn on debugging messages */ 3455 int lock; /* lock the door on device open */ 3456 int check; /* check media type */ 3457 } cdrom_sysctl_settings; 3458 3459 enum cdrom_print_option { 3460 CTL_NAME, 3461 CTL_SPEED, 3462 CTL_SLOTS, 3463 CTL_CAPABILITY 3464 }; 3465 3466 static int cdrom_print_info(const char *header, int val, char *info, 3467 int *pos, enum cdrom_print_option option) 3468 { 3469 const int max_size = sizeof(cdrom_sysctl_settings.info); 3470 struct cdrom_device_info *cdi; 3471 int ret; 3472 3473 ret = scnprintf(info + *pos, max_size - *pos, header); 3474 if (!ret) 3475 return 1; 3476 3477 *pos += ret; 3478 3479 list_for_each_entry(cdi, &cdrom_list, list) { 3480 switch (option) { 3481 case CTL_NAME: 3482 ret = scnprintf(info + *pos, max_size - *pos, 3483 "\t%s", cdi->name); 3484 break; 3485 case CTL_SPEED: 3486 ret = scnprintf(info + *pos, max_size - *pos, 3487 "\t%d", cdi->speed); 3488 break; 3489 case CTL_SLOTS: 3490 ret = scnprintf(info + *pos, max_size - *pos, 3491 "\t%d", cdi->capacity); 3492 break; 3493 case CTL_CAPABILITY: 3494 ret = scnprintf(info + *pos, max_size - *pos, 3495 "\t%d", CDROM_CAN(val) != 0); 3496 break; 3497 default: 3498 pr_info("invalid option%d\n", option); 3499 return 1; 3500 } 3501 if (!ret) 3502 return 1; 3503 *pos += ret; 3504 } 3505 3506 return 0; 3507 } 3508 3509 static int cdrom_sysctl_info(struct ctl_table *ctl, int write, 3510 void *buffer, size_t *lenp, loff_t *ppos) 3511 { 3512 int pos; 3513 char *info = cdrom_sysctl_settings.info; 3514 const int max_size = sizeof(cdrom_sysctl_settings.info); 3515 3516 if (!*lenp || (*ppos && !write)) { 3517 *lenp = 0; 3518 return 0; 3519 } 3520 3521 mutex_lock(&cdrom_mutex); 3522 3523 pos = sprintf(info, "CD-ROM information, " VERSION "\n"); 3524 3525 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME)) 3526 goto done; 3527 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED)) 3528 goto done; 3529 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS)) 3530 goto done; 3531 if (cdrom_print_info("\nCan close tray:\t", 3532 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY)) 3533 goto done; 3534 if (cdrom_print_info("\nCan open tray:\t", 3535 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY)) 3536 goto done; 3537 if (cdrom_print_info("\nCan lock tray:\t", 3538 CDC_LOCK, info, &pos, CTL_CAPABILITY)) 3539 goto done; 3540 if (cdrom_print_info("\nCan change speed:", 3541 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY)) 3542 goto done; 3543 if (cdrom_print_info("\nCan select disk:", 3544 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY)) 3545 goto done; 3546 if (cdrom_print_info("\nCan read multisession:", 3547 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY)) 3548 goto done; 3549 if (cdrom_print_info("\nCan read MCN:\t", 3550 CDC_MCN, info, &pos, CTL_CAPABILITY)) 3551 goto done; 3552 if (cdrom_print_info("\nReports media changed:", 3553 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY)) 3554 goto done; 3555 if (cdrom_print_info("\nCan play audio:\t", 3556 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY)) 3557 goto done; 3558 if (cdrom_print_info("\nCan write CD-R:\t", 3559 CDC_CD_R, info, &pos, CTL_CAPABILITY)) 3560 goto done; 3561 if (cdrom_print_info("\nCan write CD-RW:", 3562 CDC_CD_RW, info, &pos, CTL_CAPABILITY)) 3563 goto done; 3564 if (cdrom_print_info("\nCan read DVD:\t", 3565 CDC_DVD, info, &pos, CTL_CAPABILITY)) 3566 goto done; 3567 if (cdrom_print_info("\nCan write DVD-R:", 3568 CDC_DVD_R, info, &pos, CTL_CAPABILITY)) 3569 goto done; 3570 if (cdrom_print_info("\nCan write DVD-RAM:", 3571 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY)) 3572 goto done; 3573 if (cdrom_print_info("\nCan read MRW:\t", 3574 CDC_MRW, info, &pos, CTL_CAPABILITY)) 3575 goto done; 3576 if (cdrom_print_info("\nCan write MRW:\t", 3577 CDC_MRW_W, info, &pos, CTL_CAPABILITY)) 3578 goto done; 3579 if (cdrom_print_info("\nCan write RAM:\t", 3580 CDC_RAM, info, &pos, CTL_CAPABILITY)) 3581 goto done; 3582 if (!scnprintf(info + pos, max_size - pos, "\n\n")) 3583 goto done; 3584 doit: 3585 mutex_unlock(&cdrom_mutex); 3586 return proc_dostring(ctl, write, buffer, lenp, ppos); 3587 done: 3588 pr_info("info buffer too small\n"); 3589 goto doit; 3590 } 3591 3592 /* Unfortunately, per device settings are not implemented through 3593 procfs/sysctl yet. When they are, this will naturally disappear. For now 3594 just update all drives. Later this will become the template on which 3595 new registered drives will be based. */ 3596 static void cdrom_update_settings(void) 3597 { 3598 struct cdrom_device_info *cdi; 3599 3600 mutex_lock(&cdrom_mutex); 3601 list_for_each_entry(cdi, &cdrom_list, list) { 3602 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) 3603 cdi->options |= CDO_AUTO_CLOSE; 3604 else if (!autoclose) 3605 cdi->options &= ~CDO_AUTO_CLOSE; 3606 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY)) 3607 cdi->options |= CDO_AUTO_EJECT; 3608 else if (!autoeject) 3609 cdi->options &= ~CDO_AUTO_EJECT; 3610 if (lockdoor && CDROM_CAN(CDC_LOCK)) 3611 cdi->options |= CDO_LOCK; 3612 else if (!lockdoor) 3613 cdi->options &= ~CDO_LOCK; 3614 if (check_media_type) 3615 cdi->options |= CDO_CHECK_TYPE; 3616 else 3617 cdi->options &= ~CDO_CHECK_TYPE; 3618 } 3619 mutex_unlock(&cdrom_mutex); 3620 } 3621 3622 static int cdrom_sysctl_handler(struct ctl_table *ctl, int write, 3623 void *buffer, size_t *lenp, loff_t *ppos) 3624 { 3625 int ret; 3626 3627 ret = proc_dointvec(ctl, write, buffer, lenp, ppos); 3628 3629 if (write) { 3630 3631 /* we only care for 1 or 0. */ 3632 autoclose = !!cdrom_sysctl_settings.autoclose; 3633 autoeject = !!cdrom_sysctl_settings.autoeject; 3634 debug = !!cdrom_sysctl_settings.debug; 3635 lockdoor = !!cdrom_sysctl_settings.lock; 3636 check_media_type = !!cdrom_sysctl_settings.check; 3637 3638 /* update the option flags according to the changes. we 3639 don't have per device options through sysctl yet, 3640 but we will have and then this will disappear. */ 3641 cdrom_update_settings(); 3642 } 3643 3644 return ret; 3645 } 3646 3647 /* Place files in /proc/sys/dev/cdrom */ 3648 static struct ctl_table cdrom_table[] = { 3649 { 3650 .procname = "info", 3651 .data = &cdrom_sysctl_settings.info, 3652 .maxlen = CDROM_STR_SIZE, 3653 .mode = 0444, 3654 .proc_handler = cdrom_sysctl_info, 3655 }, 3656 { 3657 .procname = "autoclose", 3658 .data = &cdrom_sysctl_settings.autoclose, 3659 .maxlen = sizeof(int), 3660 .mode = 0644, 3661 .proc_handler = cdrom_sysctl_handler, 3662 }, 3663 { 3664 .procname = "autoeject", 3665 .data = &cdrom_sysctl_settings.autoeject, 3666 .maxlen = sizeof(int), 3667 .mode = 0644, 3668 .proc_handler = cdrom_sysctl_handler, 3669 }, 3670 { 3671 .procname = "debug", 3672 .data = &cdrom_sysctl_settings.debug, 3673 .maxlen = sizeof(int), 3674 .mode = 0644, 3675 .proc_handler = cdrom_sysctl_handler, 3676 }, 3677 { 3678 .procname = "lock", 3679 .data = &cdrom_sysctl_settings.lock, 3680 .maxlen = sizeof(int), 3681 .mode = 0644, 3682 .proc_handler = cdrom_sysctl_handler, 3683 }, 3684 { 3685 .procname = "check_media", 3686 .data = &cdrom_sysctl_settings.check, 3687 .maxlen = sizeof(int), 3688 .mode = 0644, 3689 .proc_handler = cdrom_sysctl_handler 3690 }, 3691 { } 3692 }; 3693 static struct ctl_table_header *cdrom_sysctl_header; 3694 3695 static void cdrom_sysctl_register(void) 3696 { 3697 static atomic_t initialized = ATOMIC_INIT(0); 3698 3699 if (!atomic_add_unless(&initialized, 1, 1)) 3700 return; 3701 3702 cdrom_sysctl_header = register_sysctl("dev/cdrom", cdrom_table); 3703 3704 /* set the defaults */ 3705 cdrom_sysctl_settings.autoclose = autoclose; 3706 cdrom_sysctl_settings.autoeject = autoeject; 3707 cdrom_sysctl_settings.debug = debug; 3708 cdrom_sysctl_settings.lock = lockdoor; 3709 cdrom_sysctl_settings.check = check_media_type; 3710 } 3711 3712 static void cdrom_sysctl_unregister(void) 3713 { 3714 if (cdrom_sysctl_header) 3715 unregister_sysctl_table(cdrom_sysctl_header); 3716 } 3717 3718 #else /* CONFIG_SYSCTL */ 3719 3720 static void cdrom_sysctl_register(void) 3721 { 3722 } 3723 3724 static void cdrom_sysctl_unregister(void) 3725 { 3726 } 3727 3728 #endif /* CONFIG_SYSCTL */ 3729 3730 static int __init cdrom_init(void) 3731 { 3732 cdrom_sysctl_register(); 3733 3734 return 0; 3735 } 3736 3737 static void __exit cdrom_exit(void) 3738 { 3739 pr_info("Uniform CD-ROM driver unloaded\n"); 3740 cdrom_sysctl_unregister(); 3741 } 3742 3743 module_init(cdrom_init); 3744 module_exit(cdrom_exit); 3745 MODULE_LICENSE("GPL"); 3746