1 /* linux/drivers/cdrom/cdrom.c 2 Copyright (c) 1996, 1997 David A. van Leeuwen. 3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org> 4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk> 5 6 May be copied or modified under the terms of the GNU General Public 7 License. See linux/COPYING for more information. 8 9 Uniform CD-ROM driver for Linux. 10 See Documentation/cdrom/cdrom-standard.tex for usage information. 11 12 The routines in the file provide a uniform interface between the 13 software that uses CD-ROMs and the various low-level drivers that 14 actually talk to the hardware. Suggestions are welcome. 15 Patches that work are more welcome though. ;-) 16 17 To Do List: 18 ---------------------------------- 19 20 -- Modify sysctl/proc interface. I plan on having one directory per 21 drive, with entries for outputing general drive information, and sysctl 22 based tunable parameters such as whether the tray should auto-close for 23 that drive. Suggestions (or patches) for this welcome! 24 25 26 Revision History 27 ---------------------------------- 28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl> 29 -- Initial version by David A. van Leeuwen. I don't have a detailed 30 changelog for the 1.x series, David? 31 32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org> 33 -- New maintainer! As David A. van Leeuwen has been too busy to actively 34 maintain and improve this driver, I am now carrying on the torch. If 35 you have a problem with this driver, please feel free to contact me. 36 37 -- Added (rudimentary) sysctl interface. I realize this is really weak 38 right now, and is _very_ badly implemented. It will be improved... 39 40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into 41 the Uniform CD-ROM driver via the cdrom_count_tracks function. 42 The cdrom_count_tracks function helps resolve some of the false 43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check 44 for the correct media type when mounting or playing audio from a CD. 45 46 -- Remove the calls to verify_area and only use the copy_from_user and 47 copy_to_user stuff, since these calls now provide their own memory 48 checking with the 2.1.x kernels. 49 50 -- Major update to return codes so that errors from low-level drivers 51 are passed on through (thanks to Gerd Knorr for pointing out this 52 problem). 53 54 -- Made it so if a function isn't implemented in a low-level driver, 55 ENOSYS is now returned instead of EINVAL. 56 57 -- Simplified some complex logic so that the source code is easier to read. 58 59 -- Other stuff I probably forgot to mention (lots of changes). 60 61 2.01 to 2.11 Dec 1997-Jan 1998 62 -- TO-DO! Write changelogs for 2.01 to 2.12. 63 64 2.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org> 65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that 66 copy_*_user does not return EFAULT on error, but instead returns the number 67 of bytes not copied. I was returning whatever non-zero stuff came back from 68 the copy_*_user functions directly, which would result in strange errors. 69 70 2.13 July 17, 1998 -- Erik Andersen <andersee@debian.org> 71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed 72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing 73 this out and providing a simple fix. 74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback. 75 thanks to Andrea Arcangeli 76 -- Fixed it so that the /proc entry now also shows up when cdrom is 77 compiled into the kernel. Before it only worked when loaded as a module. 78 79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org> 80 -- Fixed a bug in cdrom_media_changed and handling of reporting that 81 the media had changed for devices that _don't_ implement media_changed. 82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug. 83 -- Made a few things more pedanticly correct. 84 85 2.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk> 86 -- New maintainers! Erik was too busy to continue the work on the driver, 87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk> 88 will do their best to follow in his footsteps 89 90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk> 91 -- Check if drive is capable of doing what we ask before blindly changing 92 cdi->options in various ioctl. 93 -- Added version to proc entry. 94 95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk> 96 -- Fixed an error in open_for_data where we would sometimes not return 97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>. 98 -- Fixed module usage count - usage was based on /proc/sys/dev 99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other 100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where 101 dev would be removed even though it was used. cdrom.c just illuminated 102 that bug. 103 104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk> 105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has 106 been "rewritten" because capabilities and options aren't in sync. They 107 should be... 108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way. 109 -- Added CDROM_RESET ioctl. 110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly. 111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs 112 from parsing /proc/sys/dev/cdrom/info. 113 114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk> 115 -- Check capability mask from low level driver when counting tracks as 116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>. 117 118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk> 119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of 120 CDC_CLOSE_TRAY. 121 -- proc info didn't mask against capabilities mask. 122 123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk> 124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the 125 code was duplicated before. Drives that support the generic packet 126 interface are now being fed packets from here instead. 127 -- First attempt at adding support for MMC2 commands - for DVD and 128 CD-R(W) drives. Only the DVD parts are in now - the interface used is 129 the same as for the audio ioctls. 130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get 131 a change to perform device specific ioctls as well. 132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities. 133 -- Put in sysctl files for autoclose, autoeject, check_media, debug, 134 and lock. 135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about 136 CD-Rx and DVD capabilities. 137 -- Now default to checking media type. 138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for 139 doing this anyway, with the generic_packet addition. 140 141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk> 142 -- Fix up the sysctl handling so that the option flags get set 143 correctly. 144 -- Fix up ioctl handling so the device specific ones actually get 145 called :). 146 147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk> 148 -- Fixed volume control on SCSI drives (or others with longer audio 149 page). 150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath 151 <andrewtv@usa.net> for telling me and for having defined the various 152 DVD structures and ioctls in the first place! He designed the original 153 DVD patches for ide-cd and while I rearranged and unified them, the 154 interface is still the same. 155 156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk> 157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only 158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left. 159 -- Moved the CDROMREADxxx ioctls in here. 160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls 161 and exported functions. 162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands 163 to now read GPCMD_ for the new generic packet interface. All low level 164 drivers are updated as well. 165 -- Various other cleanups. 166 167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk> 168 -- Fixed a couple of possible memory leaks (if an operation failed and 169 we didn't free the buffer before returning the error). 170 -- Integrated Uniform CD Changer handling from Richard Sharman 171 <rsharman@pobox.com>. 172 -- Defined CD_DVD and CD_CHANGER log levels. 173 -- Fixed the CDROMREADxxx ioctls. 174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few 175 drives supported it. We lose the index part, however. 176 -- Small modifications to accommodate opens of /dev/hdc1, required 177 for ide-cd to handle multisession discs. 178 -- Export cdrom_mode_sense and cdrom_mode_select. 179 -- init_cdrom_command() for setting up a cgc command. 180 181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk> 182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually 183 impossible to send the drive data in a sensible way. 184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and 185 dvd_read_manufact. 186 -- Added setup of write mode for packet writing. 187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of 188 number of frames and split the reads in blocks of 8. 189 190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk> 191 -- Added support for changing the region of DVD drives. 192 -- Added sense data to generic command. 193 194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de> 195 -- Do same "read header length" trick in cdrom_get_disc_info() as 196 we do in cdrom_get_track_info() -- some drive don't obey specs and 197 fail if they can't supply the full Mt Fuji size table. 198 -- Deleted stuff related to setting up write modes. It has a different 199 home now. 200 -- Clear header length in mode_select unconditionally. 201 -- Removed the register_disk() that was added, not needed here. 202 203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de> 204 -- Fix direction flag in setup_send_key and setup_report_key. This 205 gave some SCSI adapters problems. 206 -- Always return -EROFS for write opens 207 -- Convert to module_init/module_exit style init and remove some 208 of the #ifdef MODULE stuff 209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid, 210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and 211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command 212 did not clear a 0 sized buffer. 213 214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de> 215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In 216 that case switch block size and issue plain READ_10 again, then switch 217 back. 218 219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de> 220 -- Fix volume control on CD's - old SCSI-II drives now use their own 221 code, as doing MODE6 stuff in here is really not my intention. 222 -- Use READ_DISC_INFO for more reliable end-of-disc. 223 224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de> 225 -- Fix bug in getting rpc phase 2 region info. 226 -- Reinstate "correct" CDROMPLAYTRKIND 227 228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de> 229 -- Use quiet bit on packet commands not known to work 230 231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de> 232 -- Various fixes and lots of cleanups not listed :-) 233 -- Locking fixes 234 -- Mt Rainier support 235 -- DVD-RAM write open fixes 236 237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov 238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units. 239 240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW 241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se> 242 243 -------------------------------------------------------------------------*/ 244 245 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 246 247 #define REVISION "Revision: 3.20" 248 #define VERSION "Id: cdrom.c 3.20 2003/12/17" 249 250 /* I use an error-log mask to give fine grain control over the type of 251 messages dumped to the system logs. The available masks include: */ 252 #define CD_NOTHING 0x0 253 #define CD_WARNING 0x1 254 #define CD_REG_UNREG 0x2 255 #define CD_DO_IOCTL 0x4 256 #define CD_OPEN 0x8 257 #define CD_CLOSE 0x10 258 #define CD_COUNT_TRACKS 0x20 259 #define CD_CHANGER 0x40 260 #define CD_DVD 0x80 261 262 /* Define this to remove _all_ the debugging messages */ 263 /* #define ERRLOGMASK CD_NOTHING */ 264 #define ERRLOGMASK CD_WARNING 265 /* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */ 266 /* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */ 267 268 #include <linux/module.h> 269 #include <linux/fs.h> 270 #include <linux/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 /* open is event synchronization point, check events first */ 990 check_disk_change(bdev); 991 992 /* if this was a O_NONBLOCK open and we should honor the flags, 993 * do a quick open without drive/disc integrity checks. */ 994 cdi->use_count++; 995 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) { 996 ret = cdi->ops->open(cdi, 1); 997 } else { 998 ret = open_for_data(cdi); 999 if (ret) 1000 goto err; 1001 cdrom_mmc3_profile(cdi); 1002 if (mode & FMODE_WRITE) { 1003 ret = -EROFS; 1004 if (cdrom_open_write(cdi)) 1005 goto err_release; 1006 if (!CDROM_CAN(CDC_RAM)) 1007 goto err_release; 1008 ret = 0; 1009 cdi->media_written = 0; 1010 } 1011 } 1012 1013 if (ret) 1014 goto err; 1015 1016 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1017 cdi->name, cdi->use_count); 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) { 1933 cdinfo(CD_WARNING, "Received invalid manufacture info length" 1934 " (%d)\n", s->manufact.len); 1935 ret = -EIO; 1936 } else { 1937 if (s->manufact.len > 2048) { 1938 cdinfo(CD_WARNING, "Received invalid manufacture info " 1939 "length (%d): truncating to 2048\n", 1940 s->manufact.len); 1941 s->manufact.len = 2048; 1942 } 1943 memcpy(s->manufact.value, &buf[4], s->manufact.len); 1944 } 1945 1946 out: 1947 kfree(buf); 1948 return ret; 1949 } 1950 1951 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s, 1952 struct packet_command *cgc) 1953 { 1954 switch (s->type) { 1955 case DVD_STRUCT_PHYSICAL: 1956 return dvd_read_physical(cdi, s, cgc); 1957 1958 case DVD_STRUCT_COPYRIGHT: 1959 return dvd_read_copyright(cdi, s, cgc); 1960 1961 case DVD_STRUCT_DISCKEY: 1962 return dvd_read_disckey(cdi, s, cgc); 1963 1964 case DVD_STRUCT_BCA: 1965 return dvd_read_bca(cdi, s, cgc); 1966 1967 case DVD_STRUCT_MANUFACT: 1968 return dvd_read_manufact(cdi, s, cgc); 1969 1970 default: 1971 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n", 1972 s->type); 1973 return -EINVAL; 1974 } 1975 } 1976 1977 int cdrom_mode_sense(struct cdrom_device_info *cdi, 1978 struct packet_command *cgc, 1979 int page_code, int page_control) 1980 { 1981 struct cdrom_device_ops *cdo = cdi->ops; 1982 1983 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1984 1985 cgc->cmd[0] = GPCMD_MODE_SENSE_10; 1986 cgc->cmd[2] = page_code | (page_control << 6); 1987 cgc->cmd[7] = cgc->buflen >> 8; 1988 cgc->cmd[8] = cgc->buflen & 0xff; 1989 cgc->data_direction = CGC_DATA_READ; 1990 return cdo->generic_packet(cdi, cgc); 1991 } 1992 1993 int cdrom_mode_select(struct cdrom_device_info *cdi, 1994 struct packet_command *cgc) 1995 { 1996 struct cdrom_device_ops *cdo = cdi->ops; 1997 1998 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1999 memset(cgc->buffer, 0, 2); 2000 cgc->cmd[0] = GPCMD_MODE_SELECT_10; 2001 cgc->cmd[1] = 0x10; /* PF */ 2002 cgc->cmd[7] = cgc->buflen >> 8; 2003 cgc->cmd[8] = cgc->buflen & 0xff; 2004 cgc->data_direction = CGC_DATA_WRITE; 2005 return cdo->generic_packet(cdi, cgc); 2006 } 2007 2008 static int cdrom_read_subchannel(struct cdrom_device_info *cdi, 2009 struct cdrom_subchnl *subchnl, int mcn) 2010 { 2011 struct cdrom_device_ops *cdo = cdi->ops; 2012 struct packet_command cgc; 2013 char buffer[32]; 2014 int ret; 2015 2016 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ); 2017 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 2018 cgc.cmd[1] = 2; /* MSF addressing */ 2019 cgc.cmd[2] = 0x40; /* request subQ data */ 2020 cgc.cmd[3] = mcn ? 2 : 1; 2021 cgc.cmd[8] = 16; 2022 2023 if ((ret = cdo->generic_packet(cdi, &cgc))) 2024 return ret; 2025 2026 subchnl->cdsc_audiostatus = cgc.buffer[1]; 2027 subchnl->cdsc_format = CDROM_MSF; 2028 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf; 2029 subchnl->cdsc_trk = cgc.buffer[6]; 2030 subchnl->cdsc_ind = cgc.buffer[7]; 2031 2032 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13]; 2033 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14]; 2034 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15]; 2035 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9]; 2036 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10]; 2037 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11]; 2038 2039 return 0; 2040 } 2041 2042 /* 2043 * Specific READ_10 interface 2044 */ 2045 static int cdrom_read_cd(struct cdrom_device_info *cdi, 2046 struct packet_command *cgc, int lba, 2047 int blocksize, int nblocks) 2048 { 2049 struct cdrom_device_ops *cdo = cdi->ops; 2050 2051 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2052 cgc->cmd[0] = GPCMD_READ_10; 2053 cgc->cmd[2] = (lba >> 24) & 0xff; 2054 cgc->cmd[3] = (lba >> 16) & 0xff; 2055 cgc->cmd[4] = (lba >> 8) & 0xff; 2056 cgc->cmd[5] = lba & 0xff; 2057 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2058 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2059 cgc->cmd[8] = nblocks & 0xff; 2060 cgc->buflen = blocksize * nblocks; 2061 return cdo->generic_packet(cdi, cgc); 2062 } 2063 2064 /* very generic interface for reading the various types of blocks */ 2065 static int cdrom_read_block(struct cdrom_device_info *cdi, 2066 struct packet_command *cgc, 2067 int lba, int nblocks, int format, int blksize) 2068 { 2069 struct cdrom_device_ops *cdo = cdi->ops; 2070 2071 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2072 cgc->cmd[0] = GPCMD_READ_CD; 2073 /* expected sector size - cdda,mode1,etc. */ 2074 cgc->cmd[1] = format << 2; 2075 /* starting address */ 2076 cgc->cmd[2] = (lba >> 24) & 0xff; 2077 cgc->cmd[3] = (lba >> 16) & 0xff; 2078 cgc->cmd[4] = (lba >> 8) & 0xff; 2079 cgc->cmd[5] = lba & 0xff; 2080 /* number of blocks */ 2081 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2082 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2083 cgc->cmd[8] = nblocks & 0xff; 2084 cgc->buflen = blksize * nblocks; 2085 2086 /* set the header info returned */ 2087 switch (blksize) { 2088 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break; 2089 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break; 2090 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break; 2091 default : cgc->cmd[9] = 0x10; 2092 } 2093 2094 return cdo->generic_packet(cdi, cgc); 2095 } 2096 2097 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2098 int lba, int nframes) 2099 { 2100 struct packet_command cgc; 2101 int ret = 0; 2102 int nr; 2103 2104 cdi->last_sense = 0; 2105 2106 memset(&cgc, 0, sizeof(cgc)); 2107 2108 /* 2109 * start with will ra.nframes size, back down if alloc fails 2110 */ 2111 nr = nframes; 2112 do { 2113 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL); 2114 if (cgc.buffer) 2115 break; 2116 2117 nr >>= 1; 2118 } while (nr); 2119 2120 if (!nr) 2121 return -ENOMEM; 2122 2123 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) { 2124 ret = -EFAULT; 2125 goto out; 2126 } 2127 2128 cgc.data_direction = CGC_DATA_READ; 2129 while (nframes > 0) { 2130 if (nr > nframes) 2131 nr = nframes; 2132 2133 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW); 2134 if (ret) 2135 break; 2136 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) { 2137 ret = -EFAULT; 2138 break; 2139 } 2140 ubuf += CD_FRAMESIZE_RAW * nr; 2141 nframes -= nr; 2142 lba += nr; 2143 } 2144 out: 2145 kfree(cgc.buffer); 2146 return ret; 2147 } 2148 2149 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2150 int lba, int nframes) 2151 { 2152 struct request_queue *q = cdi->disk->queue; 2153 struct request *rq; 2154 struct bio *bio; 2155 unsigned int len; 2156 int nr, ret = 0; 2157 2158 if (!q) 2159 return -ENXIO; 2160 2161 cdi->last_sense = 0; 2162 2163 while (nframes) { 2164 nr = nframes; 2165 if (cdi->cdda_method == CDDA_BPC_SINGLE) 2166 nr = 1; 2167 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9)) 2168 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW; 2169 2170 len = nr * CD_FRAMESIZE_RAW; 2171 2172 rq = blk_get_request(q, READ, GFP_KERNEL); 2173 if (!rq) { 2174 ret = -ENOMEM; 2175 break; 2176 } 2177 2178 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL); 2179 if (ret) { 2180 blk_put_request(rq); 2181 break; 2182 } 2183 2184 rq->cmd[0] = GPCMD_READ_CD; 2185 rq->cmd[1] = 1 << 2; 2186 rq->cmd[2] = (lba >> 24) & 0xff; 2187 rq->cmd[3] = (lba >> 16) & 0xff; 2188 rq->cmd[4] = (lba >> 8) & 0xff; 2189 rq->cmd[5] = lba & 0xff; 2190 rq->cmd[6] = (nr >> 16) & 0xff; 2191 rq->cmd[7] = (nr >> 8) & 0xff; 2192 rq->cmd[8] = nr & 0xff; 2193 rq->cmd[9] = 0xf8; 2194 2195 rq->cmd_len = 12; 2196 rq->cmd_type = REQ_TYPE_BLOCK_PC; 2197 rq->timeout = 60 * HZ; 2198 bio = rq->bio; 2199 2200 if (blk_execute_rq(q, cdi->disk, rq, 0)) { 2201 struct request_sense *s = rq->sense; 2202 ret = -EIO; 2203 cdi->last_sense = s->sense_key; 2204 } 2205 2206 if (blk_rq_unmap_user(bio)) 2207 ret = -EFAULT; 2208 blk_put_request(rq); 2209 2210 if (ret) 2211 break; 2212 2213 nframes -= nr; 2214 lba += nr; 2215 ubuf += len; 2216 } 2217 2218 return ret; 2219 } 2220 2221 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2222 int lba, int nframes) 2223 { 2224 int ret; 2225 2226 if (cdi->cdda_method == CDDA_OLD) 2227 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2228 2229 retry: 2230 /* 2231 * for anything else than success and io error, we need to retry 2232 */ 2233 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes); 2234 if (!ret || ret != -EIO) 2235 return ret; 2236 2237 /* 2238 * I've seen drives get sense 4/8/3 udma crc errors on multi 2239 * frame dma, so drop to single frame dma if we need to 2240 */ 2241 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) { 2242 pr_info("dropping to single frame dma\n"); 2243 cdi->cdda_method = CDDA_BPC_SINGLE; 2244 goto retry; 2245 } 2246 2247 /* 2248 * so we have an io error of some sort with multi frame dma. if the 2249 * condition wasn't a hardware error 2250 * problems, not for any error 2251 */ 2252 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b) 2253 return ret; 2254 2255 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense); 2256 cdi->cdda_method = CDDA_OLD; 2257 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2258 } 2259 2260 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi, 2261 void __user *argp) 2262 { 2263 struct cdrom_multisession ms_info; 2264 u8 requested_format; 2265 int ret; 2266 2267 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n"); 2268 2269 if (!(cdi->ops->capability & CDC_MULTI_SESSION)) 2270 return -ENOSYS; 2271 2272 if (copy_from_user(&ms_info, argp, sizeof(ms_info))) 2273 return -EFAULT; 2274 2275 requested_format = ms_info.addr_format; 2276 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2277 return -EINVAL; 2278 ms_info.addr_format = CDROM_LBA; 2279 2280 ret = cdi->ops->get_last_session(cdi, &ms_info); 2281 if (ret) 2282 return ret; 2283 2284 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format); 2285 2286 if (copy_to_user(argp, &ms_info, sizeof(ms_info))) 2287 return -EFAULT; 2288 2289 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n"); 2290 return 0; 2291 } 2292 2293 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi) 2294 { 2295 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n"); 2296 2297 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2298 return -ENOSYS; 2299 if (cdi->use_count != 1 || keeplocked) 2300 return -EBUSY; 2301 if (CDROM_CAN(CDC_LOCK)) { 2302 int ret = cdi->ops->lock_door(cdi, 0); 2303 if (ret) 2304 return ret; 2305 } 2306 2307 return cdi->ops->tray_move(cdi, 1); 2308 } 2309 2310 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi) 2311 { 2312 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n"); 2313 2314 if (!CDROM_CAN(CDC_CLOSE_TRAY)) 2315 return -ENOSYS; 2316 return cdi->ops->tray_move(cdi, 0); 2317 } 2318 2319 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi, 2320 unsigned long arg) 2321 { 2322 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n"); 2323 2324 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2325 return -ENOSYS; 2326 if (keeplocked) 2327 return -EBUSY; 2328 2329 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT); 2330 if (arg) 2331 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT; 2332 return 0; 2333 } 2334 2335 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, 2336 unsigned long arg) 2337 { 2338 struct cdrom_changer_info *info; 2339 int ret; 2340 2341 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 2342 2343 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2344 return -ENOSYS; 2345 2346 /* cannot select disc or select current disc */ 2347 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) 2348 return media_changed(cdi, 1); 2349 2350 if ((unsigned int)arg >= cdi->capacity) 2351 return -EINVAL; 2352 2353 info = kmalloc(sizeof(*info), GFP_KERNEL); 2354 if (!info) 2355 return -ENOMEM; 2356 2357 ret = cdrom_read_mech_status(cdi, info); 2358 if (!ret) 2359 ret = info->slots[arg].change; 2360 kfree(info); 2361 return ret; 2362 } 2363 2364 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi, 2365 unsigned long arg) 2366 { 2367 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n"); 2368 2369 /* 2370 * Options need to be in sync with capability. 2371 * Too late for that, so we have to check each one separately. 2372 */ 2373 switch (arg) { 2374 case CDO_USE_FFLAGS: 2375 case CDO_CHECK_TYPE: 2376 break; 2377 case CDO_LOCK: 2378 if (!CDROM_CAN(CDC_LOCK)) 2379 return -ENOSYS; 2380 break; 2381 case 0: 2382 return cdi->options; 2383 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */ 2384 default: 2385 if (!CDROM_CAN(arg)) 2386 return -ENOSYS; 2387 } 2388 cdi->options |= (int) arg; 2389 return cdi->options; 2390 } 2391 2392 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi, 2393 unsigned long arg) 2394 { 2395 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n"); 2396 2397 cdi->options &= ~(int) arg; 2398 return cdi->options; 2399 } 2400 2401 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi, 2402 unsigned long arg) 2403 { 2404 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n"); 2405 2406 if (!CDROM_CAN(CDC_SELECT_SPEED)) 2407 return -ENOSYS; 2408 return cdi->ops->select_speed(cdi, arg); 2409 } 2410 2411 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, 2412 unsigned long arg) 2413 { 2414 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n"); 2415 2416 if (!CDROM_CAN(CDC_SELECT_DISC)) 2417 return -ENOSYS; 2418 2419 if (arg != CDSL_CURRENT && arg != CDSL_NONE) { 2420 if ((int)arg >= cdi->capacity) 2421 return -EINVAL; 2422 } 2423 2424 /* 2425 * ->select_disc is a hook to allow a driver-specific way of 2426 * seleting disc. However, since there is no equivalent hook for 2427 * cdrom_slot_status this may not actually be useful... 2428 */ 2429 if (cdi->ops->select_disc) 2430 return cdi->ops->select_disc(cdi, arg); 2431 2432 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n"); 2433 return cdrom_select_disc(cdi, arg); 2434 } 2435 2436 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi, 2437 struct block_device *bdev) 2438 { 2439 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n"); 2440 2441 if (!capable(CAP_SYS_ADMIN)) 2442 return -EACCES; 2443 if (!CDROM_CAN(CDC_RESET)) 2444 return -ENOSYS; 2445 invalidate_bdev(bdev); 2446 return cdi->ops->reset(cdi); 2447 } 2448 2449 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi, 2450 unsigned long arg) 2451 { 2452 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl"); 2453 2454 if (!CDROM_CAN(CDC_LOCK)) 2455 return -EDRIVE_CANT_DO_THIS; 2456 2457 keeplocked = arg ? 1 : 0; 2458 2459 /* 2460 * Don't unlock the door on multiple opens by default, but allow 2461 * root to do so. 2462 */ 2463 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN)) 2464 return -EBUSY; 2465 return cdi->ops->lock_door(cdi, arg); 2466 } 2467 2468 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi, 2469 unsigned long arg) 2470 { 2471 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis"); 2472 2473 if (!capable(CAP_SYS_ADMIN)) 2474 return -EACCES; 2475 debug = arg ? 1 : 0; 2476 return debug; 2477 } 2478 2479 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi) 2480 { 2481 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n"); 2482 return (cdi->ops->capability & ~cdi->mask); 2483 } 2484 2485 /* 2486 * The following function is implemented, although very few audio 2487 * discs give Universal Product Code information, which should just be 2488 * the Medium Catalog Number on the box. Note, that the way the code 2489 * is written on the CD is /not/ uniform across all discs! 2490 */ 2491 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi, 2492 void __user *argp) 2493 { 2494 struct cdrom_mcn mcn; 2495 int ret; 2496 2497 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n"); 2498 2499 if (!(cdi->ops->capability & CDC_MCN)) 2500 return -ENOSYS; 2501 ret = cdi->ops->get_mcn(cdi, &mcn); 2502 if (ret) 2503 return ret; 2504 2505 if (copy_to_user(argp, &mcn, sizeof(mcn))) 2506 return -EFAULT; 2507 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n"); 2508 return 0; 2509 } 2510 2511 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi, 2512 unsigned long arg) 2513 { 2514 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n"); 2515 2516 if (!(cdi->ops->capability & CDC_DRIVE_STATUS)) 2517 return -ENOSYS; 2518 if (!CDROM_CAN(CDC_SELECT_DISC) || 2519 (arg == CDSL_CURRENT || arg == CDSL_NONE)) 2520 return cdi->ops->drive_status(cdi, CDSL_CURRENT); 2521 if (((int)arg >= cdi->capacity)) 2522 return -EINVAL; 2523 return cdrom_slot_status(cdi, arg); 2524 } 2525 2526 /* 2527 * Ok, this is where problems start. The current interface for the 2528 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that 2529 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this 2530 * is often the case, it is also very common for CDs to have some tracks 2531 * with data, and some tracks with audio. Just because I feel like it, 2532 * I declare the following to be the best way to cope. If the CD has ANY 2533 * data tracks on it, it will be returned as a data CD. If it has any XA 2534 * tracks, I will return it as that. Now I could simplify this interface 2535 * by combining these returns with the above, but this more clearly 2536 * demonstrates the problem with the current interface. Too bad this 2537 * wasn't designed to use bitmasks... -Erik 2538 * 2539 * Well, now we have the option CDS_MIXED: a mixed-type CD. 2540 * User level programmers might feel the ioctl is not very useful. 2541 * ---david 2542 */ 2543 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi) 2544 { 2545 tracktype tracks; 2546 2547 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n"); 2548 2549 cdrom_count_tracks(cdi, &tracks); 2550 if (tracks.error) 2551 return tracks.error; 2552 2553 /* Policy mode on */ 2554 if (tracks.audio > 0) { 2555 if (!tracks.data && !tracks.cdi && !tracks.xa) 2556 return CDS_AUDIO; 2557 else 2558 return CDS_MIXED; 2559 } 2560 2561 if (tracks.cdi > 0) 2562 return CDS_XA_2_2; 2563 if (tracks.xa > 0) 2564 return CDS_XA_2_1; 2565 if (tracks.data > 0) 2566 return CDS_DATA_1; 2567 /* Policy mode off */ 2568 2569 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n"); 2570 return CDS_NO_INFO; 2571 } 2572 2573 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi) 2574 { 2575 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n"); 2576 return cdi->capacity; 2577 } 2578 2579 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi, 2580 void __user *argp) 2581 { 2582 struct cdrom_subchnl q; 2583 u8 requested, back; 2584 int ret; 2585 2586 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/ 2587 2588 if (copy_from_user(&q, argp, sizeof(q))) 2589 return -EFAULT; 2590 2591 requested = q.cdsc_format; 2592 if (requested != CDROM_MSF && requested != CDROM_LBA) 2593 return -EINVAL; 2594 q.cdsc_format = CDROM_MSF; 2595 2596 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q); 2597 if (ret) 2598 return ret; 2599 2600 back = q.cdsc_format; /* local copy */ 2601 sanitize_format(&q.cdsc_absaddr, &back, requested); 2602 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2603 2604 if (copy_to_user(argp, &q, sizeof(q))) 2605 return -EFAULT; 2606 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2607 return 0; 2608 } 2609 2610 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 2611 void __user *argp) 2612 { 2613 struct cdrom_tochdr header; 2614 int ret; 2615 2616 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */ 2617 2618 if (copy_from_user(&header, argp, sizeof(header))) 2619 return -EFAULT; 2620 2621 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 2622 if (ret) 2623 return ret; 2624 2625 if (copy_to_user(argp, &header, sizeof(header))) 2626 return -EFAULT; 2627 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */ 2628 return 0; 2629 } 2630 2631 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi, 2632 void __user *argp) 2633 { 2634 struct cdrom_tocentry entry; 2635 u8 requested_format; 2636 int ret; 2637 2638 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */ 2639 2640 if (copy_from_user(&entry, argp, sizeof(entry))) 2641 return -EFAULT; 2642 2643 requested_format = entry.cdte_format; 2644 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2645 return -EINVAL; 2646 /* make interface to low-level uniform */ 2647 entry.cdte_format = CDROM_MSF; 2648 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry); 2649 if (ret) 2650 return ret; 2651 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format); 2652 2653 if (copy_to_user(argp, &entry, sizeof(entry))) 2654 return -EFAULT; 2655 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */ 2656 return 0; 2657 } 2658 2659 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi, 2660 void __user *argp) 2661 { 2662 struct cdrom_msf msf; 2663 2664 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2665 2666 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2667 return -ENOSYS; 2668 if (copy_from_user(&msf, argp, sizeof(msf))) 2669 return -EFAULT; 2670 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf); 2671 } 2672 2673 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi, 2674 void __user *argp) 2675 { 2676 struct cdrom_ti ti; 2677 int ret; 2678 2679 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n"); 2680 2681 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2682 return -ENOSYS; 2683 if (copy_from_user(&ti, argp, sizeof(ti))) 2684 return -EFAULT; 2685 2686 ret = check_for_audio_disc(cdi, cdi->ops); 2687 if (ret) 2688 return ret; 2689 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti); 2690 } 2691 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi, 2692 void __user *argp) 2693 { 2694 struct cdrom_volctrl volume; 2695 2696 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n"); 2697 2698 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2699 return -ENOSYS; 2700 if (copy_from_user(&volume, argp, sizeof(volume))) 2701 return -EFAULT; 2702 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume); 2703 } 2704 2705 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi, 2706 void __user *argp) 2707 { 2708 struct cdrom_volctrl volume; 2709 int ret; 2710 2711 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n"); 2712 2713 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2714 return -ENOSYS; 2715 2716 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume); 2717 if (ret) 2718 return ret; 2719 2720 if (copy_to_user(argp, &volume, sizeof(volume))) 2721 return -EFAULT; 2722 return 0; 2723 } 2724 2725 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi, 2726 unsigned int cmd) 2727 { 2728 int ret; 2729 2730 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n"); 2731 2732 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2733 return -ENOSYS; 2734 ret = check_for_audio_disc(cdi, cdi->ops); 2735 if (ret) 2736 return ret; 2737 return cdi->ops->audio_ioctl(cdi, cmd, NULL); 2738 } 2739 2740 /* 2741 * Just about every imaginable ioctl is supported in the Uniform layer 2742 * these days. 2743 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl(). 2744 */ 2745 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, 2746 fmode_t mode, unsigned int cmd, unsigned long arg) 2747 { 2748 void __user *argp = (void __user *)arg; 2749 int ret; 2750 struct gendisk *disk = bdev->bd_disk; 2751 2752 /* 2753 * Try the generic SCSI command ioctl's first. 2754 */ 2755 ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); 2756 if (ret != -ENOTTY) 2757 return ret; 2758 2759 switch (cmd) { 2760 case CDROMMULTISESSION: 2761 return cdrom_ioctl_multisession(cdi, argp); 2762 case CDROMEJECT: 2763 return cdrom_ioctl_eject(cdi); 2764 case CDROMCLOSETRAY: 2765 return cdrom_ioctl_closetray(cdi); 2766 case CDROMEJECT_SW: 2767 return cdrom_ioctl_eject_sw(cdi, arg); 2768 case CDROM_MEDIA_CHANGED: 2769 return cdrom_ioctl_media_changed(cdi, arg); 2770 case CDROM_SET_OPTIONS: 2771 return cdrom_ioctl_set_options(cdi, arg); 2772 case CDROM_CLEAR_OPTIONS: 2773 return cdrom_ioctl_clear_options(cdi, arg); 2774 case CDROM_SELECT_SPEED: 2775 return cdrom_ioctl_select_speed(cdi, arg); 2776 case CDROM_SELECT_DISC: 2777 return cdrom_ioctl_select_disc(cdi, arg); 2778 case CDROMRESET: 2779 return cdrom_ioctl_reset(cdi, bdev); 2780 case CDROM_LOCKDOOR: 2781 return cdrom_ioctl_lock_door(cdi, arg); 2782 case CDROM_DEBUG: 2783 return cdrom_ioctl_debug(cdi, arg); 2784 case CDROM_GET_CAPABILITY: 2785 return cdrom_ioctl_get_capability(cdi); 2786 case CDROM_GET_MCN: 2787 return cdrom_ioctl_get_mcn(cdi, argp); 2788 case CDROM_DRIVE_STATUS: 2789 return cdrom_ioctl_drive_status(cdi, arg); 2790 case CDROM_DISC_STATUS: 2791 return cdrom_ioctl_disc_status(cdi); 2792 case CDROM_CHANGER_NSLOTS: 2793 return cdrom_ioctl_changer_nslots(cdi); 2794 } 2795 2796 /* 2797 * Use the ioctls that are implemented through the generic_packet() 2798 * interface. this may look at bit funny, but if -ENOTTY is 2799 * returned that particular ioctl is not implemented and we 2800 * let it go through the device specific ones. 2801 */ 2802 if (CDROM_CAN(CDC_GENERIC_PACKET)) { 2803 ret = mmc_ioctl(cdi, cmd, arg); 2804 if (ret != -ENOTTY) 2805 return ret; 2806 } 2807 2808 /* 2809 * Note: most of the cdinfo() calls are commented out here, 2810 * because they fill up the sys log when CD players poll 2811 * the drive. 2812 */ 2813 switch (cmd) { 2814 case CDROMSUBCHNL: 2815 return cdrom_ioctl_get_subchnl(cdi, argp); 2816 case CDROMREADTOCHDR: 2817 return cdrom_ioctl_read_tochdr(cdi, argp); 2818 case CDROMREADTOCENTRY: 2819 return cdrom_ioctl_read_tocentry(cdi, argp); 2820 case CDROMPLAYMSF: 2821 return cdrom_ioctl_play_msf(cdi, argp); 2822 case CDROMPLAYTRKIND: 2823 return cdrom_ioctl_play_trkind(cdi, argp); 2824 case CDROMVOLCTRL: 2825 return cdrom_ioctl_volctrl(cdi, argp); 2826 case CDROMVOLREAD: 2827 return cdrom_ioctl_volread(cdi, argp); 2828 case CDROMSTART: 2829 case CDROMSTOP: 2830 case CDROMPAUSE: 2831 case CDROMRESUME: 2832 return cdrom_ioctl_audioctl(cdi, cmd); 2833 } 2834 2835 return -ENOSYS; 2836 } 2837 2838 /* 2839 * Required when we need to use READ_10 to issue other than 2048 block 2840 * reads 2841 */ 2842 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size) 2843 { 2844 struct cdrom_device_ops *cdo = cdi->ops; 2845 struct packet_command cgc; 2846 struct modesel_head mh; 2847 2848 memset(&mh, 0, sizeof(mh)); 2849 mh.block_desc_length = 0x08; 2850 mh.block_length_med = (size >> 8) & 0xff; 2851 mh.block_length_lo = size & 0xff; 2852 2853 memset(&cgc, 0, sizeof(cgc)); 2854 cgc.cmd[0] = 0x15; 2855 cgc.cmd[1] = 1 << 4; 2856 cgc.cmd[4] = 12; 2857 cgc.buflen = sizeof(mh); 2858 cgc.buffer = (char *) &mh; 2859 cgc.data_direction = CGC_DATA_WRITE; 2860 mh.block_desc_length = 0x08; 2861 mh.block_length_med = (size >> 8) & 0xff; 2862 mh.block_length_lo = size & 0xff; 2863 2864 return cdo->generic_packet(cdi, &cgc); 2865 } 2866 2867 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi, 2868 void __user *arg, 2869 struct packet_command *cgc, 2870 int cmd) 2871 { 2872 struct request_sense sense; 2873 struct cdrom_msf msf; 2874 int blocksize = 0, format = 0, lba; 2875 int ret; 2876 2877 switch (cmd) { 2878 case CDROMREADRAW: 2879 blocksize = CD_FRAMESIZE_RAW; 2880 break; 2881 case CDROMREADMODE1: 2882 blocksize = CD_FRAMESIZE; 2883 format = 2; 2884 break; 2885 case CDROMREADMODE2: 2886 blocksize = CD_FRAMESIZE_RAW0; 2887 break; 2888 } 2889 IOCTL_IN(arg, struct cdrom_msf, msf); 2890 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0); 2891 /* FIXME: we need upper bound checking, too!! */ 2892 if (lba < 0) 2893 return -EINVAL; 2894 2895 cgc->buffer = kmalloc(blocksize, GFP_KERNEL); 2896 if (cgc->buffer == NULL) 2897 return -ENOMEM; 2898 2899 memset(&sense, 0, sizeof(sense)); 2900 cgc->sense = &sense; 2901 cgc->data_direction = CGC_DATA_READ; 2902 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize); 2903 if (ret && sense.sense_key == 0x05 && 2904 sense.asc == 0x20 && 2905 sense.ascq == 0x00) { 2906 /* 2907 * SCSI-II devices are not required to support 2908 * READ_CD, so let's try switching block size 2909 */ 2910 /* FIXME: switch back again... */ 2911 ret = cdrom_switch_blocksize(cdi, blocksize); 2912 if (ret) 2913 goto out; 2914 cgc->sense = NULL; 2915 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1); 2916 ret |= cdrom_switch_blocksize(cdi, blocksize); 2917 } 2918 if (!ret && copy_to_user(arg, cgc->buffer, blocksize)) 2919 ret = -EFAULT; 2920 out: 2921 kfree(cgc->buffer); 2922 return ret; 2923 } 2924 2925 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi, 2926 void __user *arg) 2927 { 2928 struct cdrom_read_audio ra; 2929 int lba; 2930 2931 IOCTL_IN(arg, struct cdrom_read_audio, ra); 2932 2933 if (ra.addr_format == CDROM_MSF) 2934 lba = msf_to_lba(ra.addr.msf.minute, 2935 ra.addr.msf.second, 2936 ra.addr.msf.frame); 2937 else if (ra.addr_format == CDROM_LBA) 2938 lba = ra.addr.lba; 2939 else 2940 return -EINVAL; 2941 2942 /* FIXME: we need upper bound checking, too!! */ 2943 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES) 2944 return -EINVAL; 2945 2946 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes); 2947 } 2948 2949 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi, 2950 void __user *arg) 2951 { 2952 int ret; 2953 struct cdrom_subchnl q; 2954 u_char requested, back; 2955 IOCTL_IN(arg, struct cdrom_subchnl, q); 2956 requested = q.cdsc_format; 2957 if (!((requested == CDROM_MSF) || 2958 (requested == CDROM_LBA))) 2959 return -EINVAL; 2960 q.cdsc_format = CDROM_MSF; 2961 ret = cdrom_read_subchannel(cdi, &q, 0); 2962 if (ret) 2963 return ret; 2964 back = q.cdsc_format; /* local copy */ 2965 sanitize_format(&q.cdsc_absaddr, &back, requested); 2966 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2967 IOCTL_OUT(arg, struct cdrom_subchnl, q); 2968 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2969 return 0; 2970 } 2971 2972 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi, 2973 void __user *arg, 2974 struct packet_command *cgc) 2975 { 2976 struct cdrom_device_ops *cdo = cdi->ops; 2977 struct cdrom_msf msf; 2978 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2979 IOCTL_IN(arg, struct cdrom_msf, msf); 2980 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF; 2981 cgc->cmd[3] = msf.cdmsf_min0; 2982 cgc->cmd[4] = msf.cdmsf_sec0; 2983 cgc->cmd[5] = msf.cdmsf_frame0; 2984 cgc->cmd[6] = msf.cdmsf_min1; 2985 cgc->cmd[7] = msf.cdmsf_sec1; 2986 cgc->cmd[8] = msf.cdmsf_frame1; 2987 cgc->data_direction = CGC_DATA_NONE; 2988 return cdo->generic_packet(cdi, cgc); 2989 } 2990 2991 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi, 2992 void __user *arg, 2993 struct packet_command *cgc) 2994 { 2995 struct cdrom_device_ops *cdo = cdi->ops; 2996 struct cdrom_blk blk; 2997 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n"); 2998 IOCTL_IN(arg, struct cdrom_blk, blk); 2999 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10; 3000 cgc->cmd[2] = (blk.from >> 24) & 0xff; 3001 cgc->cmd[3] = (blk.from >> 16) & 0xff; 3002 cgc->cmd[4] = (blk.from >> 8) & 0xff; 3003 cgc->cmd[5] = blk.from & 0xff; 3004 cgc->cmd[7] = (blk.len >> 8) & 0xff; 3005 cgc->cmd[8] = blk.len & 0xff; 3006 cgc->data_direction = CGC_DATA_NONE; 3007 return cdo->generic_packet(cdi, cgc); 3008 } 3009 3010 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi, 3011 void __user *arg, 3012 struct packet_command *cgc, 3013 unsigned int cmd) 3014 { 3015 struct cdrom_volctrl volctrl; 3016 unsigned char buffer[32]; 3017 char mask[sizeof(buffer)]; 3018 unsigned short offset; 3019 int ret; 3020 3021 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n"); 3022 3023 IOCTL_IN(arg, struct cdrom_volctrl, volctrl); 3024 3025 cgc->buffer = buffer; 3026 cgc->buflen = 24; 3027 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0); 3028 if (ret) 3029 return ret; 3030 3031 /* originally the code depended on buffer[1] to determine 3032 how much data is available for transfer. buffer[1] is 3033 unfortunately ambigious and the only reliable way seem 3034 to be to simply skip over the block descriptor... */ 3035 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6)); 3036 3037 if (offset + 16 > sizeof(buffer)) 3038 return -E2BIG; 3039 3040 if (offset + 16 > cgc->buflen) { 3041 cgc->buflen = offset + 16; 3042 ret = cdrom_mode_sense(cdi, cgc, 3043 GPMODE_AUDIO_CTL_PAGE, 0); 3044 if (ret) 3045 return ret; 3046 } 3047 3048 /* sanity check */ 3049 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE || 3050 buffer[offset + 1] < 14) 3051 return -EINVAL; 3052 3053 /* now we have the current volume settings. if it was only 3054 a CDROMVOLREAD, return these values */ 3055 if (cmd == CDROMVOLREAD) { 3056 volctrl.channel0 = buffer[offset+9]; 3057 volctrl.channel1 = buffer[offset+11]; 3058 volctrl.channel2 = buffer[offset+13]; 3059 volctrl.channel3 = buffer[offset+15]; 3060 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl); 3061 return 0; 3062 } 3063 3064 /* get the volume mask */ 3065 cgc->buffer = mask; 3066 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1); 3067 if (ret) 3068 return ret; 3069 3070 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9]; 3071 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11]; 3072 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13]; 3073 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15]; 3074 3075 /* set volume */ 3076 cgc->buffer = buffer + offset - 8; 3077 memset(cgc->buffer, 0, 8); 3078 return cdrom_mode_select(cdi, cgc); 3079 } 3080 3081 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi, 3082 struct packet_command *cgc, 3083 int cmd) 3084 { 3085 struct cdrom_device_ops *cdo = cdi->ops; 3086 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n"); 3087 cgc->cmd[0] = GPCMD_START_STOP_UNIT; 3088 cgc->cmd[1] = 1; 3089 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0; 3090 cgc->data_direction = CGC_DATA_NONE; 3091 return cdo->generic_packet(cdi, cgc); 3092 } 3093 3094 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi, 3095 struct packet_command *cgc, 3096 int cmd) 3097 { 3098 struct cdrom_device_ops *cdo = cdi->ops; 3099 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n"); 3100 cgc->cmd[0] = GPCMD_PAUSE_RESUME; 3101 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0; 3102 cgc->data_direction = CGC_DATA_NONE; 3103 return cdo->generic_packet(cdi, cgc); 3104 } 3105 3106 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi, 3107 void __user *arg, 3108 struct packet_command *cgc) 3109 { 3110 int ret; 3111 dvd_struct *s; 3112 int size = sizeof(dvd_struct); 3113 3114 if (!CDROM_CAN(CDC_DVD)) 3115 return -ENOSYS; 3116 3117 s = kmalloc(size, GFP_KERNEL); 3118 if (!s) 3119 return -ENOMEM; 3120 3121 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 3122 if (copy_from_user(s, arg, size)) { 3123 kfree(s); 3124 return -EFAULT; 3125 } 3126 3127 ret = dvd_read_struct(cdi, s, cgc); 3128 if (ret) 3129 goto out; 3130 3131 if (copy_to_user(arg, s, size)) 3132 ret = -EFAULT; 3133 out: 3134 kfree(s); 3135 return ret; 3136 } 3137 3138 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi, 3139 void __user *arg) 3140 { 3141 int ret; 3142 dvd_authinfo ai; 3143 if (!CDROM_CAN(CDC_DVD)) 3144 return -ENOSYS; 3145 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n"); 3146 IOCTL_IN(arg, dvd_authinfo, ai); 3147 ret = dvd_do_auth(cdi, &ai); 3148 if (ret) 3149 return ret; 3150 IOCTL_OUT(arg, dvd_authinfo, ai); 3151 return 0; 3152 } 3153 3154 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi, 3155 void __user *arg) 3156 { 3157 int ret; 3158 long next = 0; 3159 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 3160 ret = cdrom_get_next_writable(cdi, &next); 3161 if (ret) 3162 return ret; 3163 IOCTL_OUT(arg, long, next); 3164 return 0; 3165 } 3166 3167 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi, 3168 void __user *arg) 3169 { 3170 int ret; 3171 long last = 0; 3172 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 3173 ret = cdrom_get_last_written(cdi, &last); 3174 if (ret) 3175 return ret; 3176 IOCTL_OUT(arg, long, last); 3177 return 0; 3178 } 3179 3180 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 3181 unsigned long arg) 3182 { 3183 struct packet_command cgc; 3184 void __user *userptr = (void __user *)arg; 3185 3186 memset(&cgc, 0, sizeof(cgc)); 3187 3188 /* build a unified command and queue it through 3189 cdo->generic_packet() */ 3190 switch (cmd) { 3191 case CDROMREADRAW: 3192 case CDROMREADMODE1: 3193 case CDROMREADMODE2: 3194 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd); 3195 case CDROMREADAUDIO: 3196 return mmc_ioctl_cdrom_read_audio(cdi, userptr); 3197 case CDROMSUBCHNL: 3198 return mmc_ioctl_cdrom_subchannel(cdi, userptr); 3199 case CDROMPLAYMSF: 3200 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc); 3201 case CDROMPLAYBLK: 3202 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc); 3203 case CDROMVOLCTRL: 3204 case CDROMVOLREAD: 3205 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd); 3206 case CDROMSTART: 3207 case CDROMSTOP: 3208 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd); 3209 case CDROMPAUSE: 3210 case CDROMRESUME: 3211 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd); 3212 case DVD_READ_STRUCT: 3213 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc); 3214 case DVD_AUTH: 3215 return mmc_ioctl_dvd_auth(cdi, userptr); 3216 case CDROM_NEXT_WRITABLE: 3217 return mmc_ioctl_cdrom_next_writable(cdi, userptr); 3218 case CDROM_LAST_WRITTEN: 3219 return mmc_ioctl_cdrom_last_written(cdi, userptr); 3220 } 3221 3222 return -ENOTTY; 3223 } 3224 3225 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type, 3226 track_information *ti) 3227 { 3228 struct cdrom_device_ops *cdo = cdi->ops; 3229 struct packet_command cgc; 3230 int ret, buflen; 3231 3232 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ); 3233 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO; 3234 cgc.cmd[1] = type & 3; 3235 cgc.cmd[4] = (track & 0xff00) >> 8; 3236 cgc.cmd[5] = track & 0xff; 3237 cgc.cmd[8] = 8; 3238 cgc.quiet = 1; 3239 3240 if ((ret = cdo->generic_packet(cdi, &cgc))) 3241 return ret; 3242 3243 buflen = be16_to_cpu(ti->track_information_length) + 3244 sizeof(ti->track_information_length); 3245 3246 if (buflen > sizeof(track_information)) 3247 buflen = sizeof(track_information); 3248 3249 cgc.cmd[8] = cgc.buflen = buflen; 3250 if ((ret = cdo->generic_packet(cdi, &cgc))) 3251 return ret; 3252 3253 /* return actual fill size */ 3254 return buflen; 3255 } 3256 3257 /* requires CD R/RW */ 3258 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di) 3259 { 3260 struct cdrom_device_ops *cdo = cdi->ops; 3261 struct packet_command cgc; 3262 int ret, buflen; 3263 3264 /* set up command and get the disc info */ 3265 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); 3266 cgc.cmd[0] = GPCMD_READ_DISC_INFO; 3267 cgc.cmd[8] = cgc.buflen = 2; 3268 cgc.quiet = 1; 3269 3270 if ((ret = cdo->generic_packet(cdi, &cgc))) 3271 return ret; 3272 3273 /* not all drives have the same disc_info length, so requeue 3274 * packet with the length the drive tells us it can supply 3275 */ 3276 buflen = be16_to_cpu(di->disc_information_length) + 3277 sizeof(di->disc_information_length); 3278 3279 if (buflen > sizeof(disc_information)) 3280 buflen = sizeof(disc_information); 3281 3282 cgc.cmd[8] = cgc.buflen = buflen; 3283 if ((ret = cdo->generic_packet(cdi, &cgc))) 3284 return ret; 3285 3286 /* return actual fill size */ 3287 return buflen; 3288 } 3289 3290 /* return the last written block on the CD-R media. this is for the udf 3291 file system. */ 3292 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) 3293 { 3294 struct cdrom_tocentry toc; 3295 disc_information di; 3296 track_information ti; 3297 __u32 last_track; 3298 int ret = -1, ti_size; 3299 3300 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3301 goto use_toc; 3302 3303 ret = cdrom_get_disc_info(cdi, &di); 3304 if (ret < (int)(offsetof(typeof(di), last_track_lsb) 3305 + sizeof(di.last_track_lsb))) 3306 goto use_toc; 3307 3308 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3309 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3310 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3311 if (ti_size < (int)offsetof(typeof(ti), track_start)) 3312 goto use_toc; 3313 3314 /* if this track is blank, try the previous. */ 3315 if (ti.blank) { 3316 if (last_track==1) 3317 goto use_toc; 3318 last_track--; 3319 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3320 } 3321 3322 if (ti_size < (int)(offsetof(typeof(ti), track_size) 3323 + sizeof(ti.track_size))) 3324 goto use_toc; 3325 3326 /* if last recorded field is valid, return it. */ 3327 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address) 3328 + sizeof(ti.last_rec_address))) { 3329 *last_written = be32_to_cpu(ti.last_rec_address); 3330 } else { 3331 /* make it up instead */ 3332 *last_written = be32_to_cpu(ti.track_start) + 3333 be32_to_cpu(ti.track_size); 3334 if (ti.free_blocks) 3335 *last_written -= (be32_to_cpu(ti.free_blocks) + 7); 3336 } 3337 return 0; 3338 3339 /* this is where we end up if the drive either can't do a 3340 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if 3341 it doesn't give enough information or fails. then we return 3342 the toc contents. */ 3343 use_toc: 3344 toc.cdte_format = CDROM_MSF; 3345 toc.cdte_track = CDROM_LEADOUT; 3346 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) 3347 return ret; 3348 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA); 3349 *last_written = toc.cdte_addr.lba; 3350 return 0; 3351 } 3352 3353 /* return the next writable block. also for udf file system. */ 3354 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable) 3355 { 3356 disc_information di; 3357 track_information ti; 3358 __u16 last_track; 3359 int ret, ti_size; 3360 3361 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3362 goto use_last_written; 3363 3364 ret = cdrom_get_disc_info(cdi, &di); 3365 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb) 3366 + sizeof(di.last_track_lsb)) 3367 goto use_last_written; 3368 3369 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3370 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3371 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3372 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start)) 3373 goto use_last_written; 3374 3375 /* if this track is blank, try the previous. */ 3376 if (ti.blank) { 3377 if (last_track == 1) 3378 goto use_last_written; 3379 last_track--; 3380 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3381 if (ti_size < 0) 3382 goto use_last_written; 3383 } 3384 3385 /* if next recordable address field is valid, use it. */ 3386 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable) 3387 + sizeof(ti.next_writable)) { 3388 *next_writable = be32_to_cpu(ti.next_writable); 3389 return 0; 3390 } 3391 3392 use_last_written: 3393 if ((ret = cdrom_get_last_written(cdi, next_writable))) { 3394 *next_writable = 0; 3395 return ret; 3396 } else { 3397 *next_writable += 7; 3398 return 0; 3399 } 3400 } 3401 3402 EXPORT_SYMBOL(cdrom_get_last_written); 3403 EXPORT_SYMBOL(register_cdrom); 3404 EXPORT_SYMBOL(unregister_cdrom); 3405 EXPORT_SYMBOL(cdrom_open); 3406 EXPORT_SYMBOL(cdrom_release); 3407 EXPORT_SYMBOL(cdrom_ioctl); 3408 EXPORT_SYMBOL(cdrom_media_changed); 3409 EXPORT_SYMBOL(cdrom_number_of_slots); 3410 EXPORT_SYMBOL(cdrom_mode_select); 3411 EXPORT_SYMBOL(cdrom_mode_sense); 3412 EXPORT_SYMBOL(init_cdrom_command); 3413 EXPORT_SYMBOL(cdrom_get_media_event); 3414 3415 #ifdef CONFIG_SYSCTL 3416 3417 #define CDROM_STR_SIZE 1000 3418 3419 static struct cdrom_sysctl_settings { 3420 char info[CDROM_STR_SIZE]; /* general info */ 3421 int autoclose; /* close tray upon mount, etc */ 3422 int autoeject; /* eject on umount */ 3423 int debug; /* turn on debugging messages */ 3424 int lock; /* lock the door on device open */ 3425 int check; /* check media type */ 3426 } cdrom_sysctl_settings; 3427 3428 enum cdrom_print_option { 3429 CTL_NAME, 3430 CTL_SPEED, 3431 CTL_SLOTS, 3432 CTL_CAPABILITY 3433 }; 3434 3435 static int cdrom_print_info(const char *header, int val, char *info, 3436 int *pos, enum cdrom_print_option option) 3437 { 3438 const int max_size = sizeof(cdrom_sysctl_settings.info); 3439 struct cdrom_device_info *cdi; 3440 int ret; 3441 3442 ret = scnprintf(info + *pos, max_size - *pos, header); 3443 if (!ret) 3444 return 1; 3445 3446 *pos += ret; 3447 3448 list_for_each_entry(cdi, &cdrom_list, list) { 3449 switch (option) { 3450 case CTL_NAME: 3451 ret = scnprintf(info + *pos, max_size - *pos, 3452 "\t%s", cdi->name); 3453 break; 3454 case CTL_SPEED: 3455 ret = scnprintf(info + *pos, max_size - *pos, 3456 "\t%d", cdi->speed); 3457 break; 3458 case CTL_SLOTS: 3459 ret = scnprintf(info + *pos, max_size - *pos, 3460 "\t%d", cdi->capacity); 3461 break; 3462 case CTL_CAPABILITY: 3463 ret = scnprintf(info + *pos, max_size - *pos, 3464 "\t%d", CDROM_CAN(val) != 0); 3465 break; 3466 default: 3467 pr_info("invalid option%d\n", option); 3468 return 1; 3469 } 3470 if (!ret) 3471 return 1; 3472 *pos += ret; 3473 } 3474 3475 return 0; 3476 } 3477 3478 static int cdrom_sysctl_info(ctl_table *ctl, int write, 3479 void __user *buffer, size_t *lenp, loff_t *ppos) 3480 { 3481 int pos; 3482 char *info = cdrom_sysctl_settings.info; 3483 const int max_size = sizeof(cdrom_sysctl_settings.info); 3484 3485 if (!*lenp || (*ppos && !write)) { 3486 *lenp = 0; 3487 return 0; 3488 } 3489 3490 mutex_lock(&cdrom_mutex); 3491 3492 pos = sprintf(info, "CD-ROM information, " VERSION "\n"); 3493 3494 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME)) 3495 goto done; 3496 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED)) 3497 goto done; 3498 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS)) 3499 goto done; 3500 if (cdrom_print_info("\nCan close tray:\t", 3501 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY)) 3502 goto done; 3503 if (cdrom_print_info("\nCan open tray:\t", 3504 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY)) 3505 goto done; 3506 if (cdrom_print_info("\nCan lock tray:\t", 3507 CDC_LOCK, info, &pos, CTL_CAPABILITY)) 3508 goto done; 3509 if (cdrom_print_info("\nCan change speed:", 3510 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY)) 3511 goto done; 3512 if (cdrom_print_info("\nCan select disk:", 3513 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY)) 3514 goto done; 3515 if (cdrom_print_info("\nCan read multisession:", 3516 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY)) 3517 goto done; 3518 if (cdrom_print_info("\nCan read MCN:\t", 3519 CDC_MCN, info, &pos, CTL_CAPABILITY)) 3520 goto done; 3521 if (cdrom_print_info("\nReports media changed:", 3522 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY)) 3523 goto done; 3524 if (cdrom_print_info("\nCan play audio:\t", 3525 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY)) 3526 goto done; 3527 if (cdrom_print_info("\nCan write CD-R:\t", 3528 CDC_CD_R, info, &pos, CTL_CAPABILITY)) 3529 goto done; 3530 if (cdrom_print_info("\nCan write CD-RW:", 3531 CDC_CD_RW, info, &pos, CTL_CAPABILITY)) 3532 goto done; 3533 if (cdrom_print_info("\nCan read DVD:\t", 3534 CDC_DVD, info, &pos, CTL_CAPABILITY)) 3535 goto done; 3536 if (cdrom_print_info("\nCan write DVD-R:", 3537 CDC_DVD_R, info, &pos, CTL_CAPABILITY)) 3538 goto done; 3539 if (cdrom_print_info("\nCan write DVD-RAM:", 3540 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY)) 3541 goto done; 3542 if (cdrom_print_info("\nCan read MRW:\t", 3543 CDC_MRW, info, &pos, CTL_CAPABILITY)) 3544 goto done; 3545 if (cdrom_print_info("\nCan write MRW:\t", 3546 CDC_MRW_W, info, &pos, CTL_CAPABILITY)) 3547 goto done; 3548 if (cdrom_print_info("\nCan write RAM:\t", 3549 CDC_RAM, info, &pos, CTL_CAPABILITY)) 3550 goto done; 3551 if (!scnprintf(info + pos, max_size - pos, "\n\n")) 3552 goto done; 3553 doit: 3554 mutex_unlock(&cdrom_mutex); 3555 return proc_dostring(ctl, write, buffer, lenp, ppos); 3556 done: 3557 pr_info("info buffer too small\n"); 3558 goto doit; 3559 } 3560 3561 /* Unfortunately, per device settings are not implemented through 3562 procfs/sysctl yet. When they are, this will naturally disappear. For now 3563 just update all drives. Later this will become the template on which 3564 new registered drives will be based. */ 3565 static void cdrom_update_settings(void) 3566 { 3567 struct cdrom_device_info *cdi; 3568 3569 mutex_lock(&cdrom_mutex); 3570 list_for_each_entry(cdi, &cdrom_list, list) { 3571 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) 3572 cdi->options |= CDO_AUTO_CLOSE; 3573 else if (!autoclose) 3574 cdi->options &= ~CDO_AUTO_CLOSE; 3575 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY)) 3576 cdi->options |= CDO_AUTO_EJECT; 3577 else if (!autoeject) 3578 cdi->options &= ~CDO_AUTO_EJECT; 3579 if (lockdoor && CDROM_CAN(CDC_LOCK)) 3580 cdi->options |= CDO_LOCK; 3581 else if (!lockdoor) 3582 cdi->options &= ~CDO_LOCK; 3583 if (check_media_type) 3584 cdi->options |= CDO_CHECK_TYPE; 3585 else 3586 cdi->options &= ~CDO_CHECK_TYPE; 3587 } 3588 mutex_unlock(&cdrom_mutex); 3589 } 3590 3591 static int cdrom_sysctl_handler(ctl_table *ctl, int write, 3592 void __user *buffer, size_t *lenp, loff_t *ppos) 3593 { 3594 int ret; 3595 3596 ret = proc_dointvec(ctl, write, buffer, lenp, ppos); 3597 3598 if (write) { 3599 3600 /* we only care for 1 or 0. */ 3601 autoclose = !!cdrom_sysctl_settings.autoclose; 3602 autoeject = !!cdrom_sysctl_settings.autoeject; 3603 debug = !!cdrom_sysctl_settings.debug; 3604 lockdoor = !!cdrom_sysctl_settings.lock; 3605 check_media_type = !!cdrom_sysctl_settings.check; 3606 3607 /* update the option flags according to the changes. we 3608 don't have per device options through sysctl yet, 3609 but we will have and then this will disappear. */ 3610 cdrom_update_settings(); 3611 } 3612 3613 return ret; 3614 } 3615 3616 /* Place files in /proc/sys/dev/cdrom */ 3617 static ctl_table cdrom_table[] = { 3618 { 3619 .procname = "info", 3620 .data = &cdrom_sysctl_settings.info, 3621 .maxlen = CDROM_STR_SIZE, 3622 .mode = 0444, 3623 .proc_handler = cdrom_sysctl_info, 3624 }, 3625 { 3626 .procname = "autoclose", 3627 .data = &cdrom_sysctl_settings.autoclose, 3628 .maxlen = sizeof(int), 3629 .mode = 0644, 3630 .proc_handler = cdrom_sysctl_handler, 3631 }, 3632 { 3633 .procname = "autoeject", 3634 .data = &cdrom_sysctl_settings.autoeject, 3635 .maxlen = sizeof(int), 3636 .mode = 0644, 3637 .proc_handler = cdrom_sysctl_handler, 3638 }, 3639 { 3640 .procname = "debug", 3641 .data = &cdrom_sysctl_settings.debug, 3642 .maxlen = sizeof(int), 3643 .mode = 0644, 3644 .proc_handler = cdrom_sysctl_handler, 3645 }, 3646 { 3647 .procname = "lock", 3648 .data = &cdrom_sysctl_settings.lock, 3649 .maxlen = sizeof(int), 3650 .mode = 0644, 3651 .proc_handler = cdrom_sysctl_handler, 3652 }, 3653 { 3654 .procname = "check_media", 3655 .data = &cdrom_sysctl_settings.check, 3656 .maxlen = sizeof(int), 3657 .mode = 0644, 3658 .proc_handler = cdrom_sysctl_handler 3659 }, 3660 { } 3661 }; 3662 3663 static ctl_table cdrom_cdrom_table[] = { 3664 { 3665 .procname = "cdrom", 3666 .maxlen = 0, 3667 .mode = 0555, 3668 .child = cdrom_table, 3669 }, 3670 { } 3671 }; 3672 3673 /* Make sure that /proc/sys/dev is there */ 3674 static ctl_table cdrom_root_table[] = { 3675 { 3676 .procname = "dev", 3677 .maxlen = 0, 3678 .mode = 0555, 3679 .child = cdrom_cdrom_table, 3680 }, 3681 { } 3682 }; 3683 static struct ctl_table_header *cdrom_sysctl_header; 3684 3685 static void cdrom_sysctl_register(void) 3686 { 3687 static int initialized; 3688 3689 if (initialized == 1) 3690 return; 3691 3692 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table); 3693 3694 /* set the defaults */ 3695 cdrom_sysctl_settings.autoclose = autoclose; 3696 cdrom_sysctl_settings.autoeject = autoeject; 3697 cdrom_sysctl_settings.debug = debug; 3698 cdrom_sysctl_settings.lock = lockdoor; 3699 cdrom_sysctl_settings.check = check_media_type; 3700 3701 initialized = 1; 3702 } 3703 3704 static void cdrom_sysctl_unregister(void) 3705 { 3706 if (cdrom_sysctl_header) 3707 unregister_sysctl_table(cdrom_sysctl_header); 3708 } 3709 3710 #else /* CONFIG_SYSCTL */ 3711 3712 static void cdrom_sysctl_register(void) 3713 { 3714 } 3715 3716 static void cdrom_sysctl_unregister(void) 3717 { 3718 } 3719 3720 #endif /* CONFIG_SYSCTL */ 3721 3722 static int __init cdrom_init(void) 3723 { 3724 cdrom_sysctl_register(); 3725 3726 return 0; 3727 } 3728 3729 static void __exit cdrom_exit(void) 3730 { 3731 pr_info("Uniform CD-ROM driver unloaded\n"); 3732 cdrom_sysctl_unregister(); 3733 } 3734 3735 module_init(cdrom_init); 3736 module_exit(cdrom_exit); 3737 MODULE_LICENSE("GPL"); 3738