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