drivers/scsi/sr_ioctl.c

   1 #include <linux/kernel.h>
   2 #include <linux/sched.h>
   3 #include <linux/mm.h>
   4 #include <linux/fs.h>
   5 #include <asm/uaccess.h>
   6 #include <linux/errno.h>
   7 #include <linux/string.h>
   8
   9 #include <linux/blk.h>
  10 #include <linux/blkpg.h>
  11 #include "scsi.h"
  12 #include "hosts.h"
  13 #include <scsi/scsi_ioctl.h>
  14
  15 #include <linux/cdrom.h>
  16 #include "sr.h"
  17
  18 #if 0
  19 #define DEBUG
  20 #endif
  21
  22 /* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
  23  * It is off by default and can be turned on with this module parameter */
  24 static int xa_test = 0;
  25
  26 extern void get_sectorsize(int);
  27
  28 #define IOCTL_RETRIES 3
  29 /* The CDROM is fairly slow, so we need a little extra time */
  30 /* In fact, it is very slow if it has to spin up first */
  31 #define IOCTL_TIMEOUT 30*HZ
  32
  33 /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command.  When these drives
  34    are emulating a SCSI device via the idescsi module, they need to have
  35    CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
  36
  37 static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
  38 {
  39         struct cdrom_tocentry trk0_te, trk1_te;
  40         struct cdrom_tochdr tochdr;
  41         u_char sr_cmd[10];
  42         int ntracks, ret;
  43
  44         if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &tochdr)))
  45                 return ret;
  46
  47         ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
  48
  49         if (ti->cdti_trk1 == ntracks)
  50                 ti->cdti_trk1 = CDROM_LEADOUT;
  51         else
  52                 ti->cdti_trk1 ++;
  53
  54         trk0_te.cdte_track = ti->cdti_trk0;
  55         trk0_te.cdte_format = CDROM_MSF;
  56         trk1_te.cdte_track = ti->cdti_trk1;
  57         trk1_te.cdte_format = CDROM_MSF;
  58
  59         if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk0_te)))
  60                 return ret;
  61         if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk1_te)))
  62                 return ret;
  63
  64         sr_cmd[0] = GPCMD_PLAY_AUDIO_MSF;
  65         sr_cmd[3] = trk0_te.cdte_addr.msf.minute;
  66         sr_cmd[4] = trk0_te.cdte_addr.msf.second;
  67         sr_cmd[5] = trk0_te.cdte_addr.msf.frame;
  68         sr_cmd[6] = trk1_te.cdte_addr.msf.minute;
  69         sr_cmd[7] = trk1_te.cdte_addr.msf.second;
  70         sr_cmd[8] = trk1_te.cdte_addr.msf.frame;
  71         return sr_do_ioctl(MINOR(cdi->dev), sr_cmd, NULL, 0, 0, SCSI_DATA_NONE, NULL);
  72 }
  73
  74 /* We do our own retries because we want to know what the specific
  75    error code is.  Normally the UNIT_ATTENTION code will automatically
  76    clear after one error */
  77
  78 int sr_do_ioctl(int target, unsigned char *sr_cmd, void *buffer, unsigned buflength, int quiet, int readwrite, struct request_sense *sense)
  79 {
  80         Scsi_Request *SRpnt;
  81         Scsi_Device *SDev;
  82         struct request *req;
  83         int result, err = 0, retries = 0;
  84         char *bounce_buffer;
  85
  86         SDev = scsi_CDs[target].device;
  87         SRpnt = scsi_allocate_request(scsi_CDs[target].device);
  88         SRpnt->sr_data_direction = readwrite;
  89
  90         /* use ISA DMA buffer if necessary */
  91         SRpnt->sr_request.buffer = buffer;
  92         if (buffer && SRpnt->sr_host->unchecked_isa_dma &&
  93             (virt_to_phys(buffer) + buflength - 1 > ISA_DMA_THRESHOLD)) {
  94                 bounce_buffer = (char *) scsi_malloc((buflength + 511) & ~511);
  95                 if (bounce_buffer == NULL) {
  96                         printk("SCSI DMA pool exhausted.");
  97                         return -ENOMEM;
  98                 }
  99                 memcpy(bounce_buffer, (char *) buffer, buflength);
 100                 buffer = bounce_buffer;
 101         }
 102       retry:
 103         if (!scsi_block_when_processing_errors(SDev))
 104                 return -ENODEV;
 105
 106
 107         scsi_wait_req(SRpnt, (void *) sr_cmd, (void *) buffer, buflength,
 108                       IOCTL_TIMEOUT, IOCTL_RETRIES);
 109
 110         req = &SRpnt->sr_request;
 111         if (SRpnt->sr_buffer && req->buffer && SRpnt->sr_buffer != req->buffer) {
 112                 memcpy(req->buffer, SRpnt->sr_buffer, SRpnt->sr_bufflen);
 113                 scsi_free(SRpnt->sr_buffer, (SRpnt->sr_bufflen + 511) & ~511);
 114                 SRpnt->sr_buffer = req->buffer;
 115         }
 116
 117         result = SRpnt->sr_result;
 118
 119         /* Minimal error checking.  Ignore cases we know about, and report the rest. */
 120         if (driver_byte(result) != 0) {
 121                 switch (SRpnt->sr_sense_buffer[2] & 0xf) {
 122                 case UNIT_ATTENTION:
 123                         scsi_CDs[target].device->changed = 1;
 124                         if (!quiet)
 125                                 printk(KERN_INFO "sr%d: disc change detected.\n", target);
 126                         if (retries++ < 10)
 127                                 goto retry;
 128                         err = -ENOMEDIUM;
 129                         break;
 130                 case NOT_READY: /* This happens if there is no disc in drive */
 131                         if (SRpnt->sr_sense_buffer[12] == 0x04 &&
 132                             SRpnt->sr_sense_buffer[13] == 0x01) {
 133                                 /* sense: Logical unit is in process of becoming ready */
 134                                 if (!quiet)
 135                                         printk(KERN_INFO "sr%d: CDROM not ready yet.\n", target);
 136                                 if (retries++ < 10) {
 137                                         /* sleep 2 sec and try again */
 138                                         scsi_sleep(2 * HZ);
 139                                         goto retry;
 140                                 } else {
 141                                         /* 20 secs are enough? */
 142                                         err = -ENOMEDIUM;
 143                                         break;
 144                                 }
 145                         }
 146                         if (!quiet)
 147                                 printk(KERN_INFO "sr%d: CDROM not ready.  Make sure there is a disc in the drive.\n", target);
 148 #ifdef DEBUG
 149                         print_req_sense("sr", SRpnt);
 150 #endif
 151                         err = -ENOMEDIUM;
 152                         break;
 153                 case ILLEGAL_REQUEST:
 154                         if (!quiet)
 155                                 printk(KERN_ERR "sr%d: CDROM (ioctl) reports ILLEGAL "
 156                                        "REQUEST.\n", target);
 157                         if (SRpnt->sr_sense_buffer[12] == 0x20 &&
 158                             SRpnt->sr_sense_buffer[13] == 0x00) {
 159                                 /* sense: Invalid command operation code */
 160                                 err = -EDRIVE_CANT_DO_THIS;
 161                         } else {
 162                                 err = -EINVAL;
 163                         }
 164 #ifdef DEBUG
 165                         print_command(sr_cmd);
 166                         print_req_sense("sr", SRpnt);
 167 #endif
 168                         break;
 169                 default:
 170                         printk(KERN_ERR "sr%d: CDROM (ioctl) error, command: ", target);
 171                         print_command(sr_cmd);
 172                         print_req_sense("sr", SRpnt);
 173                         err = -EIO;
 174                 }
 175         }
 176
 177         if (sense)
 178                 memcpy(sense, SRpnt->sr_sense_buffer, sizeof(*sense));
 179
 180         /* Wake up a process waiting for device */
 181         scsi_release_request(SRpnt);
 182         SRpnt = NULL;
 183         return err;
 184 }
 185
 186 /* ---------------------------------------------------------------------- */
 187 /* interface to cdrom.c                                                   */
 188
 189 static int test_unit_ready(int minor)
 190 {
 191         u_char sr_cmd[10];
 192
 193         sr_cmd[0] = GPCMD_TEST_UNIT_READY;
 194         sr_cmd[1] = ((scsi_CDs[minor].device->lun) << 5);
 195         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 196         return sr_do_ioctl(minor, sr_cmd, NULL, 0, 1, SCSI_DATA_NONE, NULL);
 197 }
 198
 199 int sr_tray_move(struct cdrom_device_info *cdi, int pos)
 200 {
 201         u_char sr_cmd[10];
 202
 203         sr_cmd[0] = GPCMD_START_STOP_UNIT;
 204         sr_cmd[1] = ((scsi_CDs[MINOR(cdi->dev)].device->lun) << 5);
 205         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 206         sr_cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
 207
 208         return sr_do_ioctl(MINOR(cdi->dev), sr_cmd, NULL, 0, 0, SCSI_DATA_NONE, NULL);
 209 }
 210
 211 int sr_lock_door(struct cdrom_device_info *cdi, int lock)
 212 {
 213         return scsi_ioctl(scsi_CDs[MINOR(cdi->dev)].device,
 214                       lock ? SCSI_IOCTL_DOORLOCK : SCSI_IOCTL_DOORUNLOCK,
 215                           0);
 216 }
 217
 218 int sr_drive_status(struct cdrom_device_info *cdi, int slot)
 219 {
 220         if (CDSL_CURRENT != slot) {
 221                 /* we have no changer support */
 222                 return -EINVAL;
 223         }
 224         if (0 == test_unit_ready(MINOR(cdi->dev)))
 225                 return CDS_DISC_OK;
 226
 227         return CDS_TRAY_OPEN;
 228 }
 229
 230 int sr_disk_status(struct cdrom_device_info *cdi)
 231 {
 232         struct cdrom_tochdr toc_h;
 233         struct cdrom_tocentry toc_e;
 234         int i, rc, have_datatracks = 0;
 235
 236         /* look for data tracks */
 237         if (0 != (rc = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &toc_h)))
 238                 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
 239
 240         for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
 241                 toc_e.cdte_track = i;
 242                 toc_e.cdte_format = CDROM_LBA;
 243                 if (sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &toc_e))
 244                         return CDS_NO_INFO;
 245                 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
 246                         have_datatracks = 1;
 247                         break;
 248                 }
 249         }
 250         if (!have_datatracks)
 251                 return CDS_AUDIO;
 252
 253         if (scsi_CDs[MINOR(cdi->dev)].xa_flag)
 254                 return CDS_XA_2_1;
 255         else
 256                 return CDS_DATA_1;
 257 }
 258
 259 int sr_get_last_session(struct cdrom_device_info *cdi,
 260                         struct cdrom_multisession *ms_info)
 261 {
 262         ms_info->addr.lba = scsi_CDs[MINOR(cdi->dev)].ms_offset;
 263         ms_info->xa_flag = scsi_CDs[MINOR(cdi->dev)].xa_flag ||
 264             (scsi_CDs[MINOR(cdi->dev)].ms_offset > 0);
 265
 266         return 0;
 267 }
 268
 269 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
 270 {
 271         u_char sr_cmd[10];
 272         char buffer[32];
 273         int result;
 274
 275         sr_cmd[0] = GPCMD_READ_SUBCHANNEL;
 276         sr_cmd[1] = ((scsi_CDs[MINOR(cdi->dev)].device->lun) << 5);
 277         sr_cmd[2] = 0x40;       /* I do want the subchannel info */
 278         sr_cmd[3] = 0x02;       /* Give me medium catalog number info */
 279         sr_cmd[4] = sr_cmd[5] = 0;
 280         sr_cmd[6] = 0;
 281         sr_cmd[7] = 0;
 282         sr_cmd[8] = 24;
 283         sr_cmd[9] = 0;
 284
 285         result = sr_do_ioctl(MINOR(cdi->dev), sr_cmd, buffer, 24, 0, SCSI_DATA_READ, NULL);
 286
 287         memcpy(mcn->medium_catalog_number, buffer + 9, 13);
 288         mcn->medium_catalog_number[13] = 0;
 289
 290         return result;
 291 }
 292
 293 int sr_reset(struct cdrom_device_info *cdi)
 294 {
 295         invalidate_buffers(cdi->dev);
 296         return 0;
 297 }
 298
 299 int sr_select_speed(struct cdrom_device_info *cdi, int speed)
 300 {
 301         u_char sr_cmd[MAX_COMMAND_SIZE];
 302
 303         if (speed == 0)
 304                 speed = 0xffff; /* set to max */
 305         else
 306                 speed *= 177;   /* Nx to kbyte/s */
 307
 308         memset(sr_cmd, 0, MAX_COMMAND_SIZE);
 309         sr_cmd[0] = GPCMD_SET_SPEED;    /* SET CD SPEED */
 310         sr_cmd[1] = (scsi_CDs[MINOR(cdi->dev)].device->lun) << 5;
 311         sr_cmd[2] = (speed >> 8) & 0xff;        /* MSB for speed (in kbytes/sec) */
 312         sr_cmd[3] = speed & 0xff;       /* LSB */
 313
 314         if (sr_do_ioctl(MINOR(cdi->dev), sr_cmd, NULL, 0, 0, SCSI_DATA_NONE, NULL))
 315                 return -EIO;
 316         return 0;
 317 }
 318
 319 /* ----------------------------------------------------------------------- */
 320 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer,  */
 321 /* because the generic cdrom driver does the user access stuff for us.     */
 322 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the  */
 323 /* sr_disk_status interface for the generic cdrom driver.                  */
 324
 325 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
 326 {
 327         u_char sr_cmd[10];
 328         int result, target = MINOR(cdi->dev);
 329         unsigned char buffer[32];
 330
 331         memset(sr_cmd, 0, sizeof(sr_cmd));
 332
 333         switch (cmd) {
 334         case CDROMREADTOCHDR:
 335                 {
 336                         struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg;
 337
 338                         sr_cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 339                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5);
 340                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 341                         sr_cmd[8] = 12;         /* LSB of length */
 342
 343                         result = sr_do_ioctl(target, sr_cmd, buffer, 12, 1, SCSI_DATA_READ, NULL);
 344
 345                         tochdr->cdth_trk0 = buffer[2];
 346                         tochdr->cdth_trk1 = buffer[3];
 347
 348                         break;
 349                 }
 350
 351         case CDROMREADTOCENTRY:
 352                 {
 353                         struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg;
 354
 355                         sr_cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 356                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) |
 357                             (tocentry->cdte_format == CDROM_MSF ? 0x02 : 0);
 358                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 359                         sr_cmd[6] = tocentry->cdte_track;
 360                         sr_cmd[8] = 12;         /* LSB of length */
 361
 362                         result = sr_do_ioctl(target, sr_cmd, buffer, 12, 0, SCSI_DATA_READ, NULL);
 363
 364                         tocentry->cdte_ctrl = buffer[5] & 0xf;
 365                         tocentry->cdte_adr = buffer[5] >> 4;
 366                         tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
 367                         if (tocentry->cdte_format == CDROM_MSF) {
 368                                 tocentry->cdte_addr.msf.minute = buffer[9];
 369                                 tocentry->cdte_addr.msf.second = buffer[10];
 370                                 tocentry->cdte_addr.msf.frame = buffer[11];
 371                         } else
 372                                 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
 373                                         + buffer[10]) << 8) + buffer[11];
 374
 375                         break;
 376                 }
 377
 378         case CDROMPLAYTRKIND: {
 379                 struct cdrom_ti* ti = (struct cdrom_ti*)arg;
 380
 381                 sr_cmd[0] = GPCMD_PLAYAUDIO_TI;
 382                 sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 383                 sr_cmd[4] = ti->cdti_trk0;
 384                 sr_cmd[5] = ti->cdti_ind0;
 385                 sr_cmd[7] = ti->cdti_trk1;
 386                 sr_cmd[8] = ti->cdti_ind1;
 387
 388                 result = sr_do_ioctl(target, sr_cmd, NULL, 0, 0, SCSI_DATA_NONE, NULL);
 389                 if (result == -EDRIVE_CANT_DO_THIS)
 390                         result = sr_fake_playtrkind(cdi, ti);
 391
 392                 break;
 393         }
 394
 395         default:
 396                 return -EINVAL;
 397         }
 398
 399 #if 0
 400         if (result)
 401                 printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd, result);
 402 #endif
 403
 404         return result;
 405 }
 406
 407 /* -----------------------------------------------------------------------
 408  * a function to read all sorts of funny cdrom sectors using the READ_CD
 409  * scsi-3 mmc command
 410  *
 411  * lba:     linear block address
 412  * format:  0 = data (anything)
 413  *          1 = audio
 414  *          2 = data (mode 1)
 415  *          3 = data (mode 2)
 416  *          4 = data (mode 2 form1)
 417  *          5 = data (mode 2 form2)
 418  * blksize: 2048 | 2336 | 2340 | 2352
 419  */
 420
 421 int sr_read_cd(int minor, unsigned char *dest, int lba, int format, int blksize)
 422 {
 423         unsigned char cmd[MAX_COMMAND_SIZE];
 424
 425 #ifdef DEBUG
 426         printk("sr%d: sr_read_cd lba=%d format=%d blksize=%d\n",
 427                minor, lba, format, blksize);
 428 #endif
 429
 430         memset(cmd, 0, MAX_COMMAND_SIZE);
 431         cmd[0] = GPCMD_READ_CD; /* READ_CD */
 432         cmd[1] = (scsi_CDs[minor].device->lun << 5) | ((format & 7) << 2);
 433         cmd[2] = (unsigned char) (lba >> 24) & 0xff;
 434         cmd[3] = (unsigned char) (lba >> 16) & 0xff;
 435         cmd[4] = (unsigned char) (lba >> 8) & 0xff;
 436         cmd[5] = (unsigned char) lba & 0xff;
 437         cmd[8] = 1;
 438         switch (blksize) {
 439         case 2336:
 440                 cmd[9] = 0x58;
 441                 break;
 442         case 2340:
 443                 cmd[9] = 0x78;
 444                 break;
 445         case 2352:
 446                 cmd[9] = 0xf8;
 447                 break;
 448         default:
 449                 cmd[9] = 0x10;
 450                 break;
 451         }
 452         return sr_do_ioctl(minor, cmd, dest, blksize, 0, SCSI_DATA_READ, NULL);
 453 }
 454
 455 /*
 456  * read sectors with blocksizes other than 2048
 457  */
 458
 459 int sr_read_sector(int minor, int lba, int blksize, unsigned char *dest)
 460 {
 461         unsigned char cmd[MAX_COMMAND_SIZE];    /* the scsi-command */
 462         int rc;
 463
 464         /* we try the READ CD command first... */
 465         if (scsi_CDs[minor].readcd_known) {
 466                 rc = sr_read_cd(minor, dest, lba, 0, blksize);
 467                 if (-EDRIVE_CANT_DO_THIS != rc)
 468                         return rc;
 469                 scsi_CDs[minor].readcd_known = 0;
 470                 printk("CDROM does'nt support READ CD (0xbe) command\n");
 471                 /* fall & retry the other way */
 472         }
 473         /* ... if this fails, we switch the blocksize using MODE SELECT */
 474         if (blksize != scsi_CDs[minor].device->sector_size) {
 475                 if (0 != (rc = sr_set_blocklength(minor, blksize)))
 476                         return rc;
 477         }
 478 #ifdef DEBUG
 479         printk("sr%d: sr_read_sector lba=%d blksize=%d\n", minor, lba, blksize);
 480 #endif
 481
 482         memset(cmd, 0, MAX_COMMAND_SIZE);
 483         cmd[0] = GPCMD_READ_10;
 484         cmd[1] = (scsi_CDs[minor].device->lun << 5);
 485         cmd[2] = (unsigned char) (lba >> 24) & 0xff;
 486         cmd[3] = (unsigned char) (lba >> 16) & 0xff;
 487         cmd[4] = (unsigned char) (lba >> 8) & 0xff;
 488         cmd[5] = (unsigned char) lba & 0xff;
 489         cmd[8] = 1;
 490         rc = sr_do_ioctl(minor, cmd, dest, blksize, 0, SCSI_DATA_READ, NULL);
 491
 492         return rc;
 493 }
 494
 495 /*
 496  * read a sector in raw mode to check the sector format
 497  * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
 498  */
 499
 500 int sr_is_xa(int minor)
 501 {
 502         unsigned char *raw_sector;
 503         int is_xa;
 504
 505         if (!xa_test)
 506                 return 0;
 507
 508         raw_sector = (unsigned char *) scsi_malloc(2048 + 512);
 509         if (!raw_sector)
 510                 return -ENOMEM;
 511         if (0 == sr_read_sector(minor, scsi_CDs[minor].ms_offset + 16,
 512                                 CD_FRAMESIZE_RAW1, raw_sector)) {
 513                 is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
 514         } else {
 515                 /* read a raw sector failed for some reason. */
 516                 is_xa = -1;
 517         }
 518         scsi_free(raw_sector, 2048 + 512);
 519 #ifdef DEBUG
 520         printk("sr%d: sr_is_xa: %d\n", minor, is_xa);
 521 #endif
 522         return is_xa;
 523 }
 524
 525 int sr_dev_ioctl(struct cdrom_device_info *cdi,
 526                  unsigned int cmd, unsigned long arg)
 527 {
 528         int target;
 529
 530         target = MINOR(cdi->dev);
 531
 532         switch (cmd) {
 533         case BLKROSET:
 534         case BLKROGET:
 535         case BLKRASET:
 536         case BLKRAGET:
 537         case BLKFLSBUF:
 538         case BLKSSZGET:
 539                 return blk_ioctl(cdi->dev, cmd, arg);
 540
 541         default:
 542                 return scsi_ioctl(scsi_CDs[target].device, cmd, (void *) arg);
 543         }
 544 }
 545
 546 /*
 547  * Overrides for Emacs so that we follow Linus's tabbing style.
 548  * Emacs will notice this stuff at the end of the file and automatically
 549  * adjust the settings for this buffer only.  This must remain at the end
 550  * of the file.
 551  * ---------------------------------------------------------------------------
 552  * Local variables:
 553  * c-indent-level: 4
 554  * c-brace-imaginary-offset: 0
 555  * c-brace-offset: -4
 556  * c-argdecl-indent: 4
 557  * c-label-offset: -4
 558  * c-continued-statement-offset: 4
 559  * c-continued-brace-offset: 0
 560  * indent-tabs-mode: nil
 561  * tab-width: 8
 562  * End:
 563  */