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