libparted/arch/linux.c

   1 /* libparted - a library for manipulating disk partitions
   2     Copyright (C) 1999-2010 Free Software Foundation, Inc.
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 3 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 #define PROC_DEVICES_BUFSIZ 16384
  19
  20 #include <config.h>
  21 #include <arch/linux.h>
  22 #include <linux/blkpg.h>
  23 #include <parted/parted.h>
  24 #include <parted/debug.h>
  25 #if defined __s390__ || defined __s390x__
  26 #include <parted/fdasd.h>
  27 #endif
  28
  29 #include <ctype.h>
  30 #include <errno.h>
  31 #include <fcntl.h>
  32 #include <libgen.h>
  33 #include <stdio.h>
  34 #include <syscall.h>
  35 #include <unistd.h>
  36 #include <stdbool.h>
  37 #include <dirent.h>
  38 #include <sys/ioctl.h>
  39 #include <sys/stat.h>
  40 #include <sys/types.h>
  41 #include <sys/utsname.h>        /* for uname() */
  42 #include <scsi/scsi.h>
  43 #ifdef ENABLE_DEVICE_MAPPER
  44 #include <libdevmapper.h>
  45 #endif
  46
  47 #include "../architecture.h"
  48 #include "dirname.h"
  49
  50 #if ENABLE_NLS
  51 #  include <libintl.h>
  52 #  define _(String) dgettext (PACKAGE, String)
  53 #else
  54 #  define _(String) (String)
  55 #endif /* ENABLE_NLS */
  56
  57 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
  58
  59 #ifndef __NR__llseek
  60 #define __NR__llseek 140
  61 #endif
  62
  63 #ifndef SCSI_IOCTL_SEND_COMMAND
  64 #define SCSI_IOCTL_SEND_COMMAND 1
  65 #endif
  66
  67 /* from <linux/hdreg.h> */
  68 #define HDIO_GETGEO             0x0301  /* get device geometry */
  69 #define HDIO_GET_IDENTITY       0x030d  /* get IDE identification info */
  70
  71 #define RD_MODE (O_RDONLY)
  72 #define WR_MODE (O_WRONLY)
  73 #define RW_MODE (O_RDWR)
  74
  75 struct hd_geometry {
  76         unsigned char heads;
  77         unsigned char sectors;
  78         unsigned short cylinders;
  79         unsigned long start;
  80 };
  81
  82 struct ata7_sectinfo {
  83         int valid1:1;
  84         int valid2:1;
  85         int rsv:26;
  86         int multiplier:4;
  87 };
  88
  89 /* structure returned by HDIO_GET_IDENTITY, as per ANSI ATA2 rev.2f spec */
  90 struct hd_driveid {
  91         unsigned short  config;         /* lots of obsolete bit flags */
  92         unsigned short  cyls;           /* "physical" cyls */
  93         unsigned short  reserved2;      /* reserved (word 2) */
  94         unsigned short  heads;          /* "physical" heads */
  95         unsigned short  track_bytes;    /* unformatted bytes per track */
  96         unsigned short  sector_bytes;   /* unformatted bytes per sector */
  97         unsigned short  sectors;        /* "physical" sectors per track */
  98         unsigned short  vendor0;        /* vendor unique */
  99         unsigned short  vendor1;        /* vendor unique */
 100         unsigned short  vendor2;        /* vendor unique */
 101         unsigned char   serial_no[20];  /* 0 = not_specified */
 102         unsigned short  buf_type;
 103         unsigned short  buf_size;       /* 512 byte increments;
 104                                                          0 = not_specified */
 105         unsigned short  ecc_bytes;      /* for r/w long cmds;
 106                                                          0 = not_specified */
 107         unsigned char   fw_rev[8];      /* 0 = not_specified */
 108         char            model[40];      /* 0 = not_specified */
 109         unsigned char   max_multsect;   /* 0=not_implemented */
 110         unsigned char   vendor3;        /* vendor unique */
 111         unsigned short  dword_io;       /* 0=not_implemented; 1=implemented */
 112         unsigned char   vendor4;        /* vendor unique */
 113         unsigned char   capability;     /* bits 0:DMA 1:LBA 2:IORDYsw
 114                                                 3:IORDYsup*/
 115         unsigned short  reserved50;     /* reserved (word 50) */
 116         unsigned char   vendor5;        /* vendor unique */
 117         unsigned char   tPIO;           /* 0=slow, 1=medium, 2=fast */
 118         unsigned char   vendor6;        /* vendor unique */
 119         unsigned char   tDMA;           /* 0=slow, 1=medium, 2=fast */
 120         unsigned short  field_valid;    /* bits 0:cur_ok 1:eide_ok */
 121         unsigned short  cur_cyls;       /* logical cylinders */
 122         unsigned short  cur_heads;      /* logical heads */
 123         unsigned short  cur_sectors;    /* logical sectors per track */
 124         unsigned short  cur_capacity0;  /* logical total sectors on drive */
 125         unsigned short  cur_capacity1;  /*  (2 words, misaligned int)     */
 126         unsigned char   multsect;       /* current multiple sector count */
 127         unsigned char   multsect_valid; /* when (bit0==1) multsect is ok */
 128         unsigned int    lba_capacity;   /* total number of sectors */
 129         unsigned short  dma_1word;      /* single-word dma info */
 130         unsigned short  dma_mword;      /* multiple-word dma info */
 131         unsigned short  eide_pio_modes; /* bits 0:mode3 1:mode4 */
 132         unsigned short  eide_dma_min;   /* min mword dma cycle time (ns) */
 133         unsigned short  eide_dma_time;  /* recommended mword dma cycle
 134                                            time (ns) */
 135         unsigned short  eide_pio;       /* min cycle time (ns), no IORDY  */
 136         unsigned short  eide_pio_iordy; /* min cycle time (ns), with IORDY */
 137         unsigned short  words69_70[2];  /* reserved words 69-70 */
 138         /* HDIO_GET_IDENTITY currently returns only words 0 through 70 */
 139         unsigned short  words71_74[4];  /* reserved words 71-74 */
 140         unsigned short  queue_depth;    /*  */
 141         unsigned short  words76_79[4];  /* reserved words 76-79 */
 142         unsigned short  major_rev_num;  /*  */
 143         unsigned short  minor_rev_num;  /*  */
 144         unsigned short  command_set_1;  /* bits 0:Smart 1:Security 2:Removable
 145                                                 3:PM */
 146         unsigned short  command_set_2;  /* bits 14:Smart Enabled 13:0 zero */
 147         unsigned short  cfsse;          /* command set-feature supported
 148                                            extensions */
 149         unsigned short  cfs_enable_1;   /* command set-feature enabled */
 150         unsigned short  cfs_enable_2;   /* command set-feature enabled */
 151         unsigned short  csf_default;    /* command set-feature default */
 152         unsigned short  dma_ultra;      /*  */
 153         unsigned short  word89;         /* reserved (word 89) */
 154         unsigned short  word90;         /* reserved (word 90) */
 155         unsigned short  CurAPMvalues;   /* current APM values */
 156         unsigned short  word92;         /* reserved (word 92) */
 157         unsigned short  hw_config;      /* hardware config */
 158         unsigned short  words94_105[12];/* reserved words 94-105 */
 159         struct ata7_sectinfo ata7_sectinfo; /* ATAPI/ATA7 physical and logical
 160                                                sector size */
 161         unsigned short  words107_116[10];/* reserved words 107-116 */
 162         unsigned int    logical_sectsize;/* ATAPI/ATA7 logical sector size */
 163         unsigned short  words119_125[7];/* reserved words 119-125 */
 164         unsigned short  last_lun;       /* reserved (word 126) */
 165         unsigned short  word127;        /* reserved (word 127) */
 166         unsigned short  dlf;            /* device lock function
 167                                          * 15:9 reserved
 168                                          * 8    security level 1:max 0:high
 169                                          * 7:6  reserved
 170                                          * 5    enhanced erase
 171                                          * 4    expire
 172                                          * 3    frozen
 173                                          * 2    locked
 174                                          * 1    en/disabled
 175                                          * 0    capability
 176                                          */
 177         unsigned short  csfo;           /* current set features options
 178                                          * 15:4 reserved
 179                                          * 3    auto reassign
 180                                          * 2    reverting
 181                                          * 1    read-look-ahead
 182                                          * 0    write cache
 183                                          */
 184         unsigned short  words130_155[26];/* reserved vendor words 130-155 */
 185         unsigned short  word156;
 186         unsigned short  words157_159[3]; /* reserved vendor words 157-159 */
 187         unsigned short  words160_255[95];/* reserved words 160-255 */
 188 };
 189
 190 /* from <linux/fs.h> */
 191 #define BLKRRPART  _IO(0x12,95) /* re-read partition table */
 192 #define BLKGETSIZE _IO(0x12,96) /* return device size */
 193 #define BLKFLSBUF  _IO(0x12,97) /* flush buffer cache */
 194 #define BLKSSZGET  _IO(0x12,104) /* get block device sector size */
 195 #define BLKGETLASTSECT  _IO(0x12,108) /* get last sector of block device */
 196 #define BLKSETLASTSECT  _IO(0x12,109) /* set last sector of block device */
 197
 198 /* return device size in bytes (u64 *arg) */
 199 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
 200
 201 struct blkdev_ioctl_param {
 202         unsigned int block;
 203         size_t content_length;
 204         char * block_contents;
 205 };
 206
 207 /* from <linux/major.h> */
 208 #define IDE0_MAJOR              3
 209 #define IDE1_MAJOR              22
 210 #define IDE2_MAJOR              33
 211 #define IDE3_MAJOR              34
 212 #define IDE4_MAJOR              56
 213 #define IDE5_MAJOR              57
 214 #define SCSI_CDROM_MAJOR        11
 215 #define SCSI_DISK0_MAJOR        8
 216 #define SCSI_DISK1_MAJOR        65
 217 #define SCSI_DISK2_MAJOR        66
 218 #define SCSI_DISK3_MAJOR        67
 219 #define SCSI_DISK4_MAJOR        68
 220 #define SCSI_DISK5_MAJOR        69
 221 #define SCSI_DISK6_MAJOR        70
 222 #define SCSI_DISK7_MAJOR        71
 223 #define COMPAQ_SMART2_MAJOR     72
 224 #define COMPAQ_SMART2_MAJOR1    73
 225 #define COMPAQ_SMART2_MAJOR2    74
 226 #define COMPAQ_SMART2_MAJOR3    75
 227 #define COMPAQ_SMART2_MAJOR4    76
 228 #define COMPAQ_SMART2_MAJOR5    77
 229 #define COMPAQ_SMART2_MAJOR6    78
 230 #define COMPAQ_SMART2_MAJOR7    79
 231 #define COMPAQ_SMART_MAJOR      104
 232 #define COMPAQ_SMART_MAJOR1     105
 233 #define COMPAQ_SMART_MAJOR2     106
 234 #define COMPAQ_SMART_MAJOR3     107
 235 #define COMPAQ_SMART_MAJOR4     108
 236 #define COMPAQ_SMART_MAJOR5     109
 237 #define COMPAQ_SMART_MAJOR6     110
 238 #define COMPAQ_SMART_MAJOR7     111
 239 #define DAC960_MAJOR            48
 240 #define ATARAID_MAJOR           114
 241 #define I2O_MAJOR1              80
 242 #define I2O_MAJOR2              81
 243 #define I2O_MAJOR3              82
 244 #define I2O_MAJOR4              83
 245 #define I2O_MAJOR5              84
 246 #define I2O_MAJOR6              85
 247 #define I2O_MAJOR7              86
 248 #define I2O_MAJOR8              87
 249 #define UBD_MAJOR               98
 250 #define DASD_MAJOR              94
 251 #define VIODASD_MAJOR           112
 252 #define AOE_MAJOR               152
 253 #define SX8_MAJOR1              160
 254 #define SX8_MAJOR2              161
 255 #define XVD_MAJOR               202
 256 #define SDMMC_MAJOR             179
 257 #define LOOP_MAJOR              7
 258 #define MD_MAJOR                9
 259
 260 #define SCSI_BLK_MAJOR(M) (                                             \
 261                 (M) == SCSI_DISK0_MAJOR                                 \
 262                 || (M) == SCSI_CDROM_MAJOR                              \
 263                 || ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
 264
 265 /* Maximum number of partitions supported by linux. */
 266 #define MAX_NUM_PARTS           64
 267
 268 static char* _device_get_part_path (PedDevice* dev, int num);
 269 static int _partition_is_mounted_by_path (const char* path);
 270
 271 static int
 272 _read_fd (int fd, char **buf)
 273 {
 274         char* p;
 275         size_t size = PROC_DEVICES_BUFSIZ;
 276         int s, filesize = 0;
 277
 278         *buf = malloc (size * sizeof (char));
 279         if (*buf == 0) {
 280                 return -1;
 281         }
 282
 283         do {
 284                 p = &(*buf) [filesize];
 285                 s = read (fd, p, PROC_DEVICES_BUFSIZ);
 286                 /* exit if there is an error or EOF is reached */
 287                 if (s <= 0)
 288                         break;
 289                 filesize += s;
 290                 size += s;
 291                 char *new_buf = realloc (*buf, size);
 292                 if (new_buf == NULL) {
 293                         int saved_errno = errno;
 294                         free (*buf);
 295                         errno = saved_errno;
 296                         return -1;
 297                 }
 298                 *buf = new_buf;
 299         } while (1);
 300
 301         if (filesize == 0 && s < 0) {
 302                 free (*buf);
 303                 *buf = NULL;
 304                 return -1;
 305         } else {
 306                 char *new_buf = realloc (*buf, filesize + 1);
 307                 if (new_buf == NULL) {
 308                         int saved_errno = errno;
 309                         free (*buf);
 310                         errno = saved_errno;
 311                         return -1;
 312                 }
 313                 *buf = new_buf;
 314                 (*buf)[filesize] = '\0';
 315         }
 316
 317         return filesize;
 318 }
 319
 320 static int
 321 _major_type_in_devices (int major, const char* type)
 322 {
 323         int fd;
 324         char* buf = NULL;
 325         char* line;
 326         char* end;
 327         int bd = 0;
 328         char c;
 329
 330         fd = open ("/proc/devices", O_RDONLY);
 331         if (fd < 0)
 332                 return 0;
 333
 334         if (_read_fd(fd, &buf) < 0) {
 335                 close(fd);
 336                 return 0;
 337         }
 338
 339         line = buf;
 340         end = strchr(line, '\n');
 341         while (end) {
 342                 char *name;
 343                 int maj;
 344
 345                 c = *end;
 346                 *end = '\0';
 347
 348                 if (!bd) {
 349                         if (!strncmp(line, "Block devices:", 14))
 350                                 bd = 1;
 351                         goto next;
 352                 }
 353
 354                 name = strrchr(line, ' ');
 355                 if (!name || strcmp(name+1, type))
 356                         goto next;
 357
 358                 maj = strtol(line, &name, 10);
 359                 if (maj == major) {
 360                         free(buf);
 361                         close(fd);
 362                         return 1;
 363                 }
 364
 365 next:
 366                 *end = c;
 367                 line = end+1;
 368                 end = strchr(line, '\n');
 369         }
 370         free(buf);
 371         close(fd);
 372         return 0;
 373 }
 374
 375 static int
 376 _is_ide_major (int major)
 377 {
 378         switch (major) {
 379                 case IDE0_MAJOR:
 380                 case IDE1_MAJOR:
 381                 case IDE2_MAJOR:
 382                 case IDE3_MAJOR:
 383                 case IDE4_MAJOR:
 384                 case IDE5_MAJOR:
 385                         return 1;
 386
 387                 default:
 388                         return 0;
 389         }
 390 }
 391
 392 static int
 393 _is_cpqarray_major (int major)
 394 {
 395         return ((COMPAQ_SMART2_MAJOR <= major && major <= COMPAQ_SMART2_MAJOR7)
 396              || (COMPAQ_SMART_MAJOR <= major && major <= COMPAQ_SMART_MAJOR7));
 397 }
 398
 399 static int
 400 _is_i2o_major (int major)
 401 {
 402         return (I2O_MAJOR1 <= major && major <= I2O_MAJOR8);
 403 }
 404
 405 static int
 406 _is_sx8_major (int major)
 407 {
 408         return (SX8_MAJOR1 <= major && major <= SX8_MAJOR2);
 409 }
 410
 411 static int
 412 _is_virtblk_major (int major)
 413 {
 414         return _major_type_in_devices (major, "virtblk");
 415 }
 416
 417 #ifdef ENABLE_DEVICE_MAPPER
 418 static int
 419 _is_dm_major (int major)
 420 {
 421         return _major_type_in_devices (major, "device-mapper");
 422 }
 423
 424 static int
 425 _dm_maptype (PedDevice *dev)
 426 {
 427         LinuxSpecific*  arch_specific = LINUX_SPECIFIC (dev);
 428         struct dm_task *dmt;
 429         uint64_t start, length;
 430         char *target_type = NULL;
 431         char *params;
 432         int r = -1;
 433         const char* dev_dir = getenv ("DM_DEV_DIR");
 434
 435         if (dev_dir && *dev_dir && !dm_set_dev_dir(dev_dir))
 436                 return r;
 437
 438         if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
 439                 return r;
 440
 441         if (!dm_task_set_major_minor(dmt, arch_specific->major,
 442                                      arch_specific->minor, 0))
 443                 goto bad;
 444
 445         dm_task_no_open_count(dmt);
 446
 447         if (!dm_task_run(dmt))
 448                 goto bad;
 449
 450         dm_get_next_target(dmt, NULL, &start, &length, &target_type, &params);
 451
 452         arch_specific->dmtype = strdup(target_type ? target_type : "NO-TARGET");
 453         if (arch_specific->dmtype == NULL)
 454                 goto bad;
 455         r = 0;
 456 bad:
 457         dm_task_destroy(dmt);
 458         return r;
 459 }
 460
 461
 462 static int
 463 _probe_dm_devices ()
 464 {
 465        DIR*            mapper_dir;
 466        struct dirent*  dent;
 467        char            buf [512];      /* readdir(3) claims d_name[256] */
 468        struct stat     st;
 469
 470        mapper_dir = opendir ("/dev/mapper");
 471        if (!mapper_dir)
 472                return 0;
 473
 474        /* Search the /dev/mapper directory for devices w/ the same major
 475         * number that was returned from _probe_lvm_major().
 476         */
 477        while ((dent = readdir (mapper_dir))) {
 478                if (strcmp (dent->d_name, ".")  == 0 ||
 479                    strcmp (dent->d_name, "..") == 0)
 480                        continue;
 481
 482                snprintf (buf, sizeof (buf), "/dev/mapper/%s", dent->d_name);
 483
 484                if (stat (buf, &st) != 0)
 485                        continue;
 486
 487                if (_is_dm_major(major(st.st_rdev)))
 488                        _ped_device_probe (buf);
 489        }
 490        closedir (mapper_dir);
 491
 492        return 1;
 493 }
 494 #endif
 495
 496 static int
 497 _device_stat (PedDevice* dev, struct stat * dev_stat)
 498 {
 499         PED_ASSERT (dev != NULL, return 0);
 500         PED_ASSERT (!dev->external_mode, return 0);
 501
 502         while (1) {
 503                 if (!stat (dev->path, dev_stat)) {
 504                         return 1;
 505                 } else {
 506                         if (ped_exception_throw (
 507                                 PED_EXCEPTION_ERROR,
 508                                 PED_EXCEPTION_RETRY_CANCEL,
 509                                 _("Could not stat device %s - %s."),
 510                                 dev->path,
 511                                 strerror (errno))
 512                                         != PED_EXCEPTION_RETRY)
 513                                 return 0;
 514                 }
 515         }
 516 }
 517
 518 static int
 519 _device_probe_type (PedDevice* dev)
 520 {
 521         struct stat             dev_stat;
 522         int                     dev_major;
 523         int                     dev_minor;
 524         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
 525
 526         if (!_device_stat (dev, &dev_stat))
 527                 return 0;
 528
 529         if (!S_ISBLK(dev_stat.st_mode)) {
 530                 dev->type = PED_DEVICE_FILE;
 531                 return 1;
 532         }
 533
 534         arch_specific->major = dev_major = major (dev_stat.st_rdev);
 535         arch_specific->minor = dev_minor = minor (dev_stat.st_rdev);
 536
 537         if (SCSI_BLK_MAJOR (dev_major) && (dev_minor % 0x10 == 0)) {
 538                 dev->type = PED_DEVICE_SCSI;
 539         } else if (_is_ide_major (dev_major) && (dev_minor % 0x40 == 0)) {
 540                 dev->type = PED_DEVICE_IDE;
 541         } else if (dev_major == DAC960_MAJOR && (dev_minor % 0x8 == 0)) {
 542                 dev->type = PED_DEVICE_DAC960;
 543         } else if (dev_major == ATARAID_MAJOR && (dev_minor % 0x10 == 0)) {
 544                 dev->type = PED_DEVICE_ATARAID;
 545         } else if (dev_major == AOE_MAJOR && (dev_minor % 0x10 == 0)) {
 546                 dev->type = PED_DEVICE_AOE;
 547         } else if (dev_major == DASD_MAJOR && (dev_minor % 0x4 == 0)) {
 548                 dev->type = PED_DEVICE_DASD;
 549         } else if (dev_major == VIODASD_MAJOR && (dev_minor % 0x8 == 0)) {
 550                 dev->type = PED_DEVICE_VIODASD;
 551         } else if (_is_sx8_major(dev_major) && (dev_minor % 0x20 == 0)) {
 552                 dev->type = PED_DEVICE_SX8;
 553         } else if (_is_i2o_major (dev_major) && (dev_minor % 0x10 == 0)) {
 554                 dev->type = PED_DEVICE_I2O;
 555         } else if (_is_cpqarray_major (dev_major) && (dev_minor % 0x10 == 0)) {
 556                 dev->type = PED_DEVICE_CPQARRAY;
 557         } else if (dev_major == UBD_MAJOR && (dev_minor % 0x10 == 0)) {
 558                 dev->type = PED_DEVICE_UBD;
 559 #ifdef ENABLE_DEVICE_MAPPER
 560         } else if (_is_dm_major(dev_major)) {
 561                 dev->type = PED_DEVICE_DM;
 562                 if (_dm_maptype(dev)) {
 563                         ped_exception_throw (
 564                                 PED_EXCEPTION_BUG,
 565                                 PED_EXCEPTION_CANCEL,
 566                                 _("Unable to determine the dm type of %s."),
 567                                 dev->path);
 568                 }
 569 #endif
 570         } else if (dev_major == XVD_MAJOR && (dev_minor % 0x10 == 0)) {
 571                 dev->type = PED_DEVICE_XVD;
 572         } else if (dev_major == SDMMC_MAJOR && (dev_minor % 0x08 == 0)) {
 573                 dev->type = PED_DEVICE_SDMMC;
 574         } else if (_is_virtblk_major(dev_major)) {
 575                 dev->type = PED_DEVICE_VIRTBLK;
 576         } else if (dev_major == LOOP_MAJOR) {
 577                 dev->type = PED_DEVICE_FILE;
 578         } else if (dev_major == MD_MAJOR) {
 579                 dev->type = PED_DEVICE_MD;
 580         } else {
 581                 dev->type = PED_DEVICE_UNKNOWN;
 582         }
 583
 584         return 1;
 585 }
 586
 587 static int
 588 _get_linux_version ()
 589 {
 590         static int kver = -1;
 591
 592         struct utsname uts;
 593         int major;
 594         int minor;
 595         int teeny;
 596
 597         if (kver != -1)
 598                 return kver;
 599
 600         if (uname (&uts))
 601                 return kver = 0;
 602         if (sscanf (uts.release, "%u.%u.%u", &major, &minor, &teeny) != 3)
 603                 return kver = 0;
 604
 605         return kver = KERNEL_VERSION (major, minor, teeny);
 606 }
 607
 608 static int
 609 _have_kern26 ()
 610 {
 611         static int have_kern26 = -1;
 612         int kver;
 613
 614         if (have_kern26 != -1)
 615                 return have_kern26;
 616
 617         kver = _get_linux_version();
 618         return have_kern26 = kver >= KERNEL_VERSION (2,6,0) ? 1 : 0;
 619 }
 620
 621 #if USE_BLKID
 622 static void
 623 get_blkid_topology (LinuxSpecific *arch_specific)
 624 {
 625         arch_specific->probe = blkid_new_probe ();
 626         if (!arch_specific->probe)
 627                 return;
 628
 629         if (blkid_probe_set_device(arch_specific->probe,
 630                                    arch_specific->fd, 0, 0))
 631                 return;
 632
 633         arch_specific->topology =
 634                 blkid_probe_get_topology(arch_specific->probe);
 635 }
 636 #endif
 637
 638 static void
 639 _device_set_sector_size (PedDevice* dev)
 640 {
 641         LinuxSpecific*  arch_specific = LINUX_SPECIFIC (dev);
 642         int sector_size;
 643
 644         dev->sector_size = PED_SECTOR_SIZE_DEFAULT;
 645         dev->phys_sector_size = PED_SECTOR_SIZE_DEFAULT;
 646
 647         PED_ASSERT (dev->open_count, return);
 648
 649         if (_get_linux_version() < KERNEL_VERSION (2,3,0)) {
 650                 dev->sector_size = PED_SECTOR_SIZE_DEFAULT;
 651                 return;
 652         }
 653
 654         if (ioctl (arch_specific->fd, BLKSSZGET, &sector_size)) {
 655                 ped_exception_throw (
 656                         PED_EXCEPTION_WARNING,
 657                         PED_EXCEPTION_OK,
 658                         _("Could not determine sector size for %s: %s.\n"
 659                           "Using the default sector size (%lld)."),
 660                         dev->path, strerror (errno), PED_SECTOR_SIZE_DEFAULT);
 661         } else {
 662                 dev->sector_size = (long long)sector_size;
 663                 dev->phys_sector_size = dev->sector_size;
 664         }
 665
 666 #if USE_BLKID
 667         get_blkid_topology(arch_specific);
 668         if (!arch_specific->topology) {
 669                 dev->phys_sector_size = 0;
 670         } else {
 671                 dev->phys_sector_size =
 672                         blkid_topology_get_physical_sector_size(
 673                                 arch_specific->topology);
 674         }
 675         if (dev->phys_sector_size == 0) {
 676                 ped_exception_throw (
 677                         PED_EXCEPTION_WARNING,
 678                         PED_EXCEPTION_OK,
 679                         _("Could not determine physical sector size for %s.\n"
 680                           "Using the logical sector size (%lld)."),
 681                         dev->path, dev->sector_size);
 682                 dev->phys_sector_size = dev->sector_size;
 683         }
 684 #endif
 685
 686 #if defined __s390__ || defined __s390x__
 687         /* Return PED_SECTOR_SIZE_DEFAULT for DASDs. */
 688         if (dev->type == PED_DEVICE_DASD) {
 689                 arch_specific->real_sector_size = dev->sector_size;
 690                 dev->sector_size = PED_SECTOR_SIZE_DEFAULT;
 691         }
 692 #endif
 693 }
 694
 695 static int
 696 _kernel_has_blkgetsize64(void)
 697 {
 698         int version = _get_linux_version();
 699
 700         if (version >= KERNEL_VERSION (2,5,4)) return 1;
 701         if (version <  KERNEL_VERSION (2,5,0) &&
 702             version >= KERNEL_VERSION (2,4,18)) return 1;
 703         return 0;
 704 }
 705
 706 /* TODO: do a binary search if BLKGETSIZE doesn't work?! */
 707 static PedSector
 708 _device_get_length (PedDevice* dev)
 709 {
 710         unsigned long           size;
 711         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
 712         uint64_t bytes=0;
 713
 714
 715         PED_ASSERT (dev->open_count > 0, return 0);
 716         PED_ASSERT (dev->sector_size % PED_SECTOR_SIZE_DEFAULT == 0, return 0);
 717
 718         if (_kernel_has_blkgetsize64()) {
 719                 if (ioctl(arch_specific->fd, BLKGETSIZE64, &bytes) == 0) {
 720                         return bytes / dev->sector_size;
 721                 }
 722         }
 723
 724         if (ioctl (arch_specific->fd, BLKGETSIZE, &size)) {
 725                 ped_exception_throw (
 726                         PED_EXCEPTION_BUG,
 727                         PED_EXCEPTION_CANCEL,
 728                         _("Unable to determine the size of %s (%s)."),
 729                         dev->path,
 730                         strerror (errno));
 731                 return 0;
 732         }
 733
 734         return size;
 735 }
 736
 737 static int
 738 _device_probe_geometry (PedDevice* dev)
 739 {
 740         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
 741         struct stat             dev_stat;
 742         struct hd_geometry      geometry;
 743
 744         if (!_device_stat (dev, &dev_stat))
 745                 return 0;
 746         PED_ASSERT (S_ISBLK (dev_stat.st_mode), return 0);
 747
 748         _device_set_sector_size (dev);
 749
 750         dev->length = _device_get_length (dev);
 751         if (!dev->length)
 752                 return 0;
 753
 754         /* The GETGEO ioctl is no longer useful (as of linux 2.6.x).  We could
 755          * still use it in 2.4.x, but this is contentious.  Perhaps we should
 756          * move to EDD. */
 757         dev->bios_geom.sectors = 63;
 758         dev->bios_geom.heads = 255;
 759         dev->bios_geom.cylinders
 760                 = dev->length / (63 * 255);
 761
 762         /* FIXME: what should we put here?  (TODO: discuss on linux-kernel) */
 763         if (!ioctl (arch_specific->fd, HDIO_GETGEO, &geometry)
 764                         && geometry.sectors && geometry.heads) {
 765                 dev->hw_geom.sectors = geometry.sectors;
 766                 dev->hw_geom.heads = geometry.heads;
 767                 dev->hw_geom.cylinders
 768                         = dev->length / (dev->hw_geom.heads
 769                                          * dev->hw_geom.sectors);
 770         } else {
 771                 dev->hw_geom = dev->bios_geom;
 772         }
 773
 774         return 1;
 775 }
 776
 777 static char*
 778 strip_name(char* str)
 779 {
 780         int     i;
 781         int     end = 0;
 782
 783         for (i = 0; str[i] != 0; i++) {
 784                 if (!isspace (str[i])
 785                     || (isspace (str[i]) && !isspace (str[i+1]) && str[i+1])) {
 786                         str [end] = str[i];
 787                         end++;
 788                 }
 789         }
 790         str[end] = 0;
 791         return strdup (str);
 792 }
 793
 794 static int
 795 init_ide (PedDevice* dev)
 796 {
 797         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
 798         struct stat             dev_stat;
 799         struct hd_driveid       hdi;
 800         PedExceptionOption      ex_status;
 801         char                    hdi_buf[41];
 802         int                     sector_multiplier = 0;
 803
 804         if (!_device_stat (dev, &dev_stat))
 805                 goto error;
 806
 807         if (!ped_device_open (dev))
 808                 goto error;
 809
 810         if (ioctl (arch_specific->fd, HDIO_GET_IDENTITY, &hdi)) {
 811                 ex_status = ped_exception_throw (
 812                                 PED_EXCEPTION_WARNING,
 813                                 PED_EXCEPTION_IGNORE_CANCEL,
 814                                 _("Could not get identity of device %s - %s"),
 815                                 dev->path, strerror (errno));
 816                 switch (ex_status) {
 817                         case PED_EXCEPTION_CANCEL:
 818                                 goto error_close_dev;
 819
 820                         case PED_EXCEPTION_UNHANDLED:
 821                                 ped_exception_catch ();
 822                         case PED_EXCEPTION_IGNORE:
 823                                 dev->model = strdup(_("Generic IDE"));
 824                                 break;
 825                         default:
 826                                 PED_ASSERT (0, (void) 0);
 827                                 break;
 828                 }
 829         } else {
 830                 /* hdi.model is not guaranteed to be NULL terminated */
 831                 memcpy (hdi_buf, hdi.model, 40);
 832                 hdi_buf[40] = '\0';
 833                 dev->model = strip_name (hdi_buf);
 834
 835                 if (!hdi.ata7_sectinfo.valid1 && hdi.ata7_sectinfo.valid2)
 836                         sector_multiplier = hdi.ata7_sectinfo.multiplier;
 837                 else
 838                         sector_multiplier = 1;
 839
 840                 if (sector_multiplier != 1) {
 841                         ex_status = ped_exception_throw (
 842                                 PED_EXCEPTION_WARNING,
 843                                 PED_EXCEPTION_IGNORE_CANCEL,
 844                                 _("Device %s has multiple (%d) logical sectors "
 845                                   "per physical sector.\n"
 846                                   "GNU Parted supports this EXPERIMENTALLY for "
 847                                   "some special disk label/file system "
 848                                   "combinations, e.g. GPT and ext2/3.\n"
 849                                   "Please consult the web site for up-to-date "
 850                                   "information."),
 851                                 dev->path, sector_multiplier);
 852
 853                         switch (ex_status) {
 854                                 case PED_EXCEPTION_CANCEL:
 855                                         goto error_close_dev;
 856
 857                                 case PED_EXCEPTION_UNHANDLED:
 858                                         ped_exception_catch ();
 859                                 case PED_EXCEPTION_IGNORE:
 860                                         break;
 861                                 default:
 862                                         PED_ASSERT (0, (void) 0);
 863                                         break;
 864                         }
 865                 }
 866
 867                 /* XXX sector_size has not been set yet! */
 868                 /* dev->phys_sector_size = dev->sector_size
 869                    * sector_multiplier;*/
 870                 dev->phys_sector_size = PED_SECTOR_SIZE_DEFAULT;
 871         }
 872
 873         if (!_device_probe_geometry (dev))
 874                 goto error_close_dev;
 875
 876         ped_device_close (dev);
 877         return 1;
 878
 879 error_close_dev:
 880         ped_device_close (dev);
 881 error:
 882         return 0;
 883 }
 884
 885 /* This function reads the /sys entry named "file" for device "dev". */
 886 static char *
 887 read_device_sysfs_file (PedDevice *dev, const char *file)
 888 {
 889         FILE *f;
 890         char name_buf[128];
 891         char buf[256];
 892
 893         snprintf (name_buf, 127, "/sys/block/%s/device/%s",
 894                   last_component (dev->path), file);
 895
 896         if ((f = fopen (name_buf, "r")) == NULL)
 897                 return NULL;
 898
 899         if (fgets (buf, 255, f) == NULL)
 900                 return NULL;
 901
 902         fclose (f);
 903         return strip_name (buf);
 904 }
 905
 906 /* This function sends a query to a SCSI device for vendor and product
 907  * information.  It uses the deprecated SCSI_IOCTL_SEND_COMMAND to
 908  * issue this query.
 909  */
 910 static int
 911 scsi_query_product_info (PedDevice* dev, char **vendor, char **product)
 912 {
 913         /* The following are defined by the SCSI-2 specification. */
 914         typedef struct _scsi_inquiry_cmd
 915         {
 916                 uint8_t op;
 917                 uint8_t lun;          /* bits 5-7 denote the LUN */
 918                 uint8_t page_code;
 919                 uint8_t reserved;
 920                 uint8_t alloc_length;
 921                 uint8_t control;
 922         } __attribute__((packed)) scsi_inquiry_cmd_t;
 923
 924         typedef struct _scsi_inquiry_data
 925         {
 926                 uint8_t peripheral_info;
 927                 uint8_t device_info;
 928                 uint8_t version_info;
 929                 uint8_t _field1;
 930                 uint8_t additional_length;
 931                 uint8_t _reserved1;
 932                 uint8_t _reserved2;
 933                 uint8_t _field2;
 934                 uint8_t vendor_id[8];
 935                 uint8_t product_id[16];
 936                 uint8_t product_revision[4];
 937                 uint8_t vendor_specific[20];
 938                 uint8_t _reserved3[40];
 939         } __attribute__((packed)) scsi_inquiry_data_t;
 940
 941         struct scsi_arg
 942         {
 943                 unsigned int inlen;
 944                 unsigned int outlen;
 945
 946                 union arg_data
 947                 {
 948                         scsi_inquiry_data_t out;
 949                         scsi_inquiry_cmd_t  in;
 950                 } data;
 951         } arg;
 952
 953         LinuxSpecific* arch_specific = LINUX_SPECIFIC (dev);
 954         char    buf[32];
 955
 956         *vendor = NULL;
 957         *product = NULL;
 958
 959         memset (&arg, 0x00, sizeof(struct scsi_arg));
 960         arg.inlen  = 0;
 961         arg.outlen = sizeof(scsi_inquiry_data_t);
 962         arg.data.in.op  = INQUIRY;
 963         arg.data.in.lun = dev->host << 5;
 964         arg.data.in.alloc_length = sizeof(scsi_inquiry_data_t);
 965         arg.data.in.page_code = 0;
 966         arg.data.in.reserved = 0;
 967         arg.data.in.control = 0;
 968
 969         if (ioctl (arch_specific->fd, SCSI_IOCTL_SEND_COMMAND, &arg) < 0)
 970                 return 0;
 971
 972         memcpy (buf, arg.data.out.vendor_id, 8);
 973         buf[8] = '\0';
 974         *vendor = strip_name (buf);
 975
 976         memcpy (buf, arg.data.out.product_id, 16);
 977         buf[16] = '\0';
 978         *product = strip_name (buf);
 979
 980         return 1;
 981 }
 982
 983 /* This function provides the vendor and product name for a SCSI device.
 984  * It supports both the modern /sys interface and direct queries
 985  * via the deprecated ioctl, SCSI_IOCTL_SEND_COMMAND.
 986  */
 987 static int
 988 scsi_get_product_info (PedDevice* dev, char **vendor, char **product)
 989 {
 990         *vendor = read_device_sysfs_file (dev, "vendor");
 991         *product = read_device_sysfs_file (dev, "model");
 992         if (*vendor && *product)
 993                 return 1;
 994
 995         return scsi_query_product_info (dev, vendor, product);
 996 }
 997
 998 static int
 999 init_scsi (PedDevice* dev)
1000 {
1001         struct scsi_idlun
1002         {
1003                 uint32_t dev_id;
1004                 uint32_t host_unique_id;
1005         } idlun;
1006
1007         LinuxSpecific* arch_specific = LINUX_SPECIFIC (dev);
1008         char* vendor;
1009         char* product;
1010
1011         if (!ped_device_open (dev))
1012                 goto error;
1013
1014         if (ioctl (arch_specific->fd, SCSI_IOCTL_GET_IDLUN, &idlun) < 0) {
1015                 dev->host = 0;
1016                 dev->did = 0;
1017                 if (ped_exception_throw (
1018                         PED_EXCEPTION_ERROR, PED_EXCEPTION_IGNORE_CANCEL,
1019                         _("Error initialising SCSI device %s - %s"),
1020                         dev->path, strerror (errno))
1021                                 != PED_EXCEPTION_IGNORE)
1022                         goto error_close_dev;
1023                 if (!_device_probe_geometry (dev))
1024                         goto error_close_dev;
1025                 ped_device_close (dev);
1026                 return 1;
1027         }
1028
1029         dev->host = idlun.host_unique_id;
1030         dev->did  = idlun.dev_id;
1031
1032         dev->model = (char*) ped_malloc (8 + 16 + 2);
1033         if (!dev->model)
1034                 goto error_close_dev;
1035
1036         if (scsi_get_product_info (dev, &vendor, &product)) {
1037                 sprintf (dev->model, "%.8s %.16s", vendor, product);
1038                 free (vendor);
1039                 free (product);
1040         } else {
1041                 strcpy (dev->model, "Generic SCSI");
1042         }
1043
1044         if (!_device_probe_geometry (dev))
1045                 goto error_close_dev;
1046
1047         ped_device_close (dev);
1048         return 1;
1049
1050 error_close_dev:
1051         ped_device_close (dev);
1052 error:
1053         return 0;
1054 }
1055
1056 static int
1057 init_file (PedDevice* dev)
1058 {
1059         struct stat     dev_stat;
1060
1061         if (!_device_stat (dev, &dev_stat))
1062                 goto error;
1063         if (!ped_device_open (dev))
1064                 goto error;
1065
1066         dev->sector_size = PED_SECTOR_SIZE_DEFAULT;
1067         char *p = getenv ("PARTED_SECTOR_SIZE");
1068         if (p) {
1069                 int s = atoi (p);
1070                 if (0 < s && s % 512 == 0)
1071                         dev->sector_size = s;
1072         }
1073         dev->phys_sector_size = dev->sector_size;
1074
1075         if (S_ISBLK(dev_stat.st_mode))
1076                 dev->length = _device_get_length (dev);
1077         else
1078                 dev->length = dev_stat.st_size / dev->sector_size;
1079         if (dev->length <= 0) {
1080                 ped_exception_throw (
1081                         PED_EXCEPTION_ERROR,
1082                         PED_EXCEPTION_CANCEL,
1083                         _("The device %s has zero length, and can't possibly "
1084                           "store a file system or partition table.  Perhaps "
1085                           "you selected the wrong device?"),
1086                         dev->path);
1087                 goto error_close_dev;
1088         }
1089
1090         ped_device_close (dev);
1091
1092         dev->bios_geom.cylinders = dev->length / 4 / 32;
1093         dev->bios_geom.heads = 4;
1094         dev->bios_geom.sectors = 32;
1095         dev->hw_geom = dev->bios_geom;
1096         dev->model = strdup ("");
1097
1098         return 1;
1099
1100 error_close_dev:
1101         ped_device_close (dev);
1102 error:
1103         return 0;
1104 }
1105
1106 #if defined __s390__ || defined __s390x__
1107 static int
1108 init_dasd (PedDevice* dev, const char* model_name)
1109 {
1110         struct stat             dev_stat;
1111         struct hd_geometry      geo;
1112         dasd_information_t dasd_info;
1113
1114         if (!_device_stat (dev, &dev_stat))
1115                 goto error;
1116
1117         if (!ped_device_open (dev))
1118                 goto error;
1119
1120         LinuxSpecific* arch_specific = LINUX_SPECIFIC (dev);
1121
1122         PED_ASSERT (S_ISBLK (dev_stat.st_mode), return 0);
1123
1124         _device_set_sector_size (dev);
1125         if (!dev->sector_size)
1126                 goto error_close_dev;
1127
1128         dev->length = _device_get_length (dev);
1129         if (!dev->length)
1130                 goto error_close_dev;
1131
1132         if (!ioctl (arch_specific->fd, HDIO_GETGEO, &geo)) {
1133                 dev->hw_geom.sectors = geo.sectors;
1134                 dev->hw_geom.heads = geo.heads;
1135                 dev->hw_geom.cylinders = dev->length
1136                         / (dev->hw_geom.heads * dev->hw_geom.sectors)
1137                         / (dev->sector_size / PED_SECTOR_SIZE_DEFAULT);
1138                 dev->bios_geom = dev->hw_geom;
1139         } else {
1140                 dev->bios_geom.sectors = 12;
1141                 dev->bios_geom.heads = 15;
1142                 dev->bios_geom.cylinders = dev->length
1143                         / (dev->hw_geom.heads * dev->hw_geom.sectors)
1144                         / (dev->sector_size / PED_SECTOR_SIZE_DEFAULT);
1145                 dev->hw_geom = dev->bios_geom;
1146         }
1147
1148         if (!ioctl(arch_specific->fd, BIODASDINFO, &dasd_info)) {
1149                 arch_specific->devno = dasd_info.devno;
1150         } else {
1151                 arch_specific->devno = arch_specific->major * 256 +
1152                                        arch_specific->minor;
1153         }
1154
1155         dev->model = strdup (model_name);
1156
1157         ped_device_close (dev);
1158         return 1;
1159
1160 error_close_dev:
1161         ped_device_close (dev);
1162 error:
1163         return 0;
1164 }
1165 #endif
1166
1167 static int
1168 init_generic (PedDevice* dev, const char* model_name)
1169 {
1170         struct stat             dev_stat;
1171         PedExceptionOption      ex_status;
1172
1173         if (!_device_stat (dev, &dev_stat))
1174                 goto error;
1175
1176         if (!ped_device_open (dev))
1177                 goto error;
1178
1179         ped_exception_fetch_all ();
1180         if (_device_probe_geometry (dev)) {
1181                 ped_exception_leave_all ();
1182         } else {
1183                 /* hack to allow use of files, for testing */
1184                 ped_exception_catch ();
1185                 ped_exception_leave_all ();
1186
1187                 ex_status = ped_exception_throw (
1188                                 PED_EXCEPTION_WARNING,
1189                                 PED_EXCEPTION_IGNORE_CANCEL,
1190                                 _("Unable to determine geometry of "
1191                                 "file/device %s.  You should not use Parted "
1192                                 "unless you REALLY know what you're doing!"),
1193                                 dev->path);
1194                 switch (ex_status) {
1195                         case PED_EXCEPTION_CANCEL:
1196                                 goto error_close_dev;
1197
1198                         case PED_EXCEPTION_UNHANDLED:
1199                                 ped_exception_catch ();
1200                         case PED_EXCEPTION_IGNORE:
1201                                 break;
1202                         default:
1203                                 PED_ASSERT (0, (void) 0);
1204                                 break;
1205                 }
1206
1207                 /* what should we stick in here? */
1208                 dev->length = dev_stat.st_size / PED_SECTOR_SIZE_DEFAULT;
1209                 dev->bios_geom.cylinders = dev->length / 4 / 32;
1210                 dev->bios_geom.heads = 4;
1211                 dev->bios_geom.sectors = 32;
1212                 dev->sector_size = PED_SECTOR_SIZE_DEFAULT;
1213                 dev->phys_sector_size = PED_SECTOR_SIZE_DEFAULT;
1214         }
1215
1216         dev->model = strdup (model_name);
1217
1218         ped_device_close (dev);
1219         return 1;
1220
1221 error_close_dev:
1222         ped_device_close (dev);
1223 error:
1224         return 0;
1225 }
1226
1227 static int
1228 sdmmc_get_product_info (PedDevice* dev, char **type, char **name)
1229 {
1230         *type = read_device_sysfs_file (dev, "type");
1231         *name = read_device_sysfs_file (dev, "name");
1232         if (*type && *name)
1233                 return 1;
1234
1235         return 0;
1236 }
1237
1238 static int
1239 init_sdmmc (PedDevice* dev)
1240 {
1241         char id[128];
1242         char *type, *name;
1243
1244         if (sdmmc_get_product_info (dev, &type, &name)) {
1245                 snprintf (id, sizeof(id) - 1, "%s %s", type, name);
1246                 free (type);
1247                 free (name);
1248         } else {
1249                 snprintf (id, sizeof(id) - 1, "%s",
1250                           _("Generic SD/MMC Storage Card"));
1251         }
1252         return init_generic(dev, id);
1253 }
1254
1255 static PedDevice*
1256 linux_new (const char* path)
1257 {
1258         PedDevice*      dev;
1259         LinuxSpecific*  arch_specific;
1260
1261         PED_ASSERT (path != NULL, return NULL);
1262
1263         dev = (PedDevice*) ped_malloc (sizeof (PedDevice));
1264         if (!dev)
1265                 goto error;
1266
1267         dev->path = strdup (path);
1268         if (!dev->path)
1269                 goto error_free_dev;
1270
1271         dev->arch_specific
1272                 = (LinuxSpecific*) ped_malloc (sizeof (LinuxSpecific));
1273         if (!dev->arch_specific)
1274                 goto error_free_path;
1275         arch_specific = LINUX_SPECIFIC (dev);
1276         arch_specific->dmtype = NULL;
1277 #if USE_BLKID
1278         arch_specific->probe = NULL;
1279         arch_specific->topology = NULL;
1280 #endif
1281
1282         dev->open_count = 0;
1283         dev->read_only = 0;
1284         dev->external_mode = 0;
1285         dev->dirty = 0;
1286         dev->boot_dirty = 0;
1287
1288         if (!_device_probe_type (dev))
1289                 goto error_free_arch_specific;
1290
1291         switch (dev->type) {
1292         case PED_DEVICE_IDE:
1293                 if (!init_ide (dev))
1294                         goto error_free_arch_specific;
1295                 break;
1296
1297         case PED_DEVICE_SCSI:
1298                 if (!init_scsi (dev))
1299                         goto error_free_arch_specific;
1300                 break;
1301
1302         case PED_DEVICE_DAC960:
1303                 if (!init_generic (dev, _("DAC960 RAID controller")))
1304                         goto error_free_arch_specific;
1305                 break;
1306
1307         case PED_DEVICE_SX8:
1308                 if (!init_generic (dev, _("Promise SX8 SATA Device")))
1309                         goto error_free_arch_specific;
1310                 break;
1311
1312         case PED_DEVICE_AOE:
1313                 if (!init_generic (dev, _("ATA over Ethernet Device")))
1314                     goto error_free_arch_specific;
1315                 break;
1316
1317 #if defined __s390__ || defined __s390x__
1318         case PED_DEVICE_DASD:
1319                 if (!init_dasd (dev, _("IBM S390 DASD drive")))
1320                         goto error_free_arch_specific;
1321                 break;
1322 #endif
1323
1324         case PED_DEVICE_VIODASD:
1325                 if (!init_generic (dev, _("IBM iSeries Virtual DASD")))
1326                         goto error_free_arch_specific;
1327                 break;
1328
1329         case PED_DEVICE_CPQARRAY:
1330                 if (!init_generic (dev, _("Compaq Smart Array")))
1331                         goto error_free_arch_specific;
1332                 break;
1333
1334         case PED_DEVICE_ATARAID:
1335                 if (!init_generic (dev, _("ATARAID Controller")))
1336                         goto error_free_arch_specific;
1337                 break;
1338
1339         case PED_DEVICE_I2O:
1340                 if (!init_generic (dev, _("I2O Controller")))
1341                         goto error_free_arch_specific;
1342                 break;
1343
1344         case PED_DEVICE_UBD:
1345                 if (!init_generic (dev, _("User-Mode Linux UBD")))
1346                         goto error_free_arch_specific;
1347                 break;
1348
1349         case PED_DEVICE_FILE:
1350                 if (!init_file (dev))
1351                         goto error_free_arch_specific;
1352                 break;
1353
1354         case PED_DEVICE_DM:
1355                 {
1356                   char* type;
1357                   if (arch_specific->dmtype == NULL
1358                       || asprintf(&type, _("Linux device-mapper (%s)"),
1359                                   arch_specific->dmtype) == -1)
1360                         goto error_free_arch_specific;
1361                   bool ok = init_generic (dev, type);
1362                   free (type);
1363                   if (!ok)
1364                     goto error_free_arch_specific;
1365                   break;
1366                 }
1367
1368         case PED_DEVICE_XVD:
1369                 if (!init_generic (dev, _("Xen Virtual Block Device")))
1370                         goto error_free_arch_specific;
1371                 break;
1372
1373         case PED_DEVICE_UNKNOWN:
1374                 if (!init_generic (dev, _("Unknown")))
1375                         goto error_free_arch_specific;
1376                 break;
1377
1378         case PED_DEVICE_SDMMC:
1379                 if (!init_sdmmc (dev))
1380                         goto error_free_arch_specific;
1381                 break;
1382         case PED_DEVICE_VIRTBLK:
1383                 if (!init_generic(dev, _("Virtio Block Device")))
1384                         goto error_free_arch_specific;
1385                 break;
1386
1387         case PED_DEVICE_MD:
1388                 if (!init_generic(dev, _("Linux Software RAID Array")))
1389                         goto error_free_arch_specific;
1390                 break;
1391
1392         default:
1393                 ped_exception_throw (PED_EXCEPTION_NO_FEATURE,
1394                                 PED_EXCEPTION_CANCEL,
1395                                 _("ped_device_new()  Unsupported device type"));
1396                 goto error_free_arch_specific;
1397         }
1398         return dev;
1399
1400 error_free_arch_specific:
1401         free (dev->arch_specific);
1402 error_free_path:
1403         free (dev->path);
1404 error_free_dev:
1405         free (dev);
1406 error:
1407         return NULL;
1408 }
1409
1410 static void
1411 linux_destroy (PedDevice* dev)
1412 {
1413         LinuxSpecific *arch_specific = LINUX_SPECIFIC(dev);
1414         void *p = arch_specific->dmtype;
1415
1416 #if USE_BLKID
1417         if (arch_specific->probe)
1418                 blkid_free_probe(arch_specific->probe);
1419 #endif
1420         free (p);
1421         free (dev->arch_specific);
1422         free (dev->path);
1423         free (dev->model);
1424         free (dev);
1425 }
1426
1427 static int
1428 linux_is_busy (PedDevice* dev)
1429 {
1430         int     i;
1431         char*   part_name;
1432
1433         if (_partition_is_mounted_by_path (dev->path))
1434                 return 1;
1435
1436         for (i = 0; i < 32; i++) {
1437                 int status;
1438
1439                 part_name = _device_get_part_path (dev, i);
1440                 if (!part_name)
1441                         return 1;
1442                 status = _partition_is_mounted_by_path (part_name);
1443                 free (part_name);
1444
1445                 if (status)
1446                         return 1;
1447         }
1448
1449         return 0;
1450 }
1451
1452 /* we need to flush the master device, and with kernel < 2.6 all the partition
1453  * devices, because there is no coherency between the caches with old kernels.
1454  * We should only flush unmounted partition devices, because:
1455  *  - there is never a need to flush them (we're not doing IO there)
1456  *  - flushing a device that is mounted causes unnecessary IO, and can
1457  * even screw journaling & friends up.  Even cause oopsen!
1458  */
1459 static void
1460 _flush_cache (PedDevice* dev)
1461 {
1462         LinuxSpecific*  arch_specific = LINUX_SPECIFIC (dev);
1463         int             i;
1464
1465         if (dev->read_only)
1466                 return;
1467         dev->dirty = 0;
1468
1469         ioctl (arch_specific->fd, BLKFLSBUF);
1470
1471         /* With linux-2.6.0 and newer, we're done.  */
1472         if (_have_kern26())
1473                 return;
1474
1475         for (i = 1; i < 16; i++) {
1476                 char*           name;
1477                 int             fd;
1478
1479                 name = _device_get_part_path (dev, i);
1480                 if (!name)
1481                         break;
1482                 if (!_partition_is_mounted_by_path (name)) {
1483                         fd = open (name, WR_MODE, 0);
1484                         if (fd > 0) {
1485                                 ioctl (fd, BLKFLSBUF);
1486 retry:
1487                                 if (fsync (fd) < 0 || close (fd) < 0)
1488                                         if (ped_exception_throw (
1489                                                 PED_EXCEPTION_WARNING,
1490                                                 PED_EXCEPTION_RETRY +
1491                                                         PED_EXCEPTION_IGNORE,
1492                                                 _("Error fsyncing/closing %s: %s"),
1493                                                 name, strerror (errno))
1494                                                         == PED_EXCEPTION_RETRY)
1495                                                 goto retry;
1496                         }
1497                 }
1498                 free (name);
1499         }
1500 }
1501
1502 static int
1503 linux_open (PedDevice* dev)
1504 {
1505         LinuxSpecific*  arch_specific = LINUX_SPECIFIC (dev);
1506
1507 retry:
1508         arch_specific->fd = open (dev->path, RW_MODE);
1509
1510         if (arch_specific->fd == -1) {
1511                 char*   rw_error_msg = strerror (errno);
1512
1513                 arch_specific->fd = open (dev->path, RD_MODE);
1514
1515                 if (arch_specific->fd == -1) {
1516                         if (ped_exception_throw (
1517                                 PED_EXCEPTION_ERROR,
1518                                 PED_EXCEPTION_RETRY_CANCEL,
1519                                 _("Error opening %s: %s"),
1520                                 dev->path, strerror (errno))
1521                                         != PED_EXCEPTION_RETRY) {
1522                                 return 0;
1523                         } else {
1524                                 goto retry;
1525                         }
1526                 } else {
1527                         ped_exception_throw (
1528                                 PED_EXCEPTION_WARNING,
1529                                 PED_EXCEPTION_OK,
1530                                 _("Unable to open %s read-write (%s).  %s has "
1531                                   "been opened read-only."),
1532                                 dev->path, rw_error_msg, dev->path);
1533                         dev->read_only = 1;
1534                 }
1535         } else {
1536                 dev->read_only = 0;
1537         }
1538
1539         /* With kernels < 2.6 flush cache for cache coherence issues */
1540         if (!_have_kern26())
1541                 _flush_cache (dev);
1542
1543         return 1;
1544 }
1545
1546 static int
1547 linux_refresh_open (PedDevice* dev)
1548 {
1549         return 1;
1550 }
1551
1552 static int
1553 linux_close (PedDevice* dev)
1554 {
1555         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
1556
1557         if (dev->dirty)
1558                 _flush_cache (dev);
1559 retry:
1560         if (fsync (arch_specific->fd) < 0 || close (arch_specific->fd) < 0)
1561                 if (ped_exception_throw (
1562                         PED_EXCEPTION_WARNING,
1563                         PED_EXCEPTION_RETRY + PED_EXCEPTION_IGNORE,
1564                         _("Error fsyncing/closing %s: %s"),
1565                         dev->path, strerror (errno))
1566                                 == PED_EXCEPTION_RETRY)
1567                         goto retry;
1568         return 1;
1569 }
1570
1571 static int
1572 linux_refresh_close (PedDevice* dev)
1573 {
1574         if (dev->dirty)
1575                 _flush_cache (dev);
1576         return 1;
1577 }
1578
1579 #if SIZEOF_OFF_T < 8
1580
1581 static _syscall5(int,_llseek,
1582                  unsigned int, fd,
1583                  unsigned long, offset_high,
1584                  unsigned long, offset_low,
1585                  loff_t*, result,
1586                  unsigned int, origin)
1587
1588 loff_t
1589 llseek (unsigned int fd, loff_t offset, unsigned int whence)
1590 {
1591         loff_t result;
1592         int retval;
1593
1594         retval = _llseek(fd,
1595                          ((unsigned long long)offset) >> 32,
1596                          ((unsigned long long)offset) & 0xffffffff,
1597                          &result,
1598                          whence);
1599         return (retval==-1 ? (loff_t) retval : result);
1600 }
1601
1602 #endif /* SIZEOF_OFF_T < 8 */
1603
1604 static int
1605 _device_seek (const PedDevice* dev, PedSector sector)
1606 {
1607         LinuxSpecific*  arch_specific;
1608
1609         PED_ASSERT (dev->sector_size % PED_SECTOR_SIZE_DEFAULT == 0, return 0);
1610         PED_ASSERT (dev != NULL, return 0);
1611         PED_ASSERT (!dev->external_mode, return 0);
1612
1613         arch_specific = LINUX_SPECIFIC (dev);
1614
1615 #if SIZEOF_OFF_T < 8
1616         if (sizeof (off_t) < 8) {
1617                 loff_t  pos = (loff_t)(sector * dev->sector_size);
1618                 return llseek (arch_specific->fd, pos, SEEK_SET) == pos;
1619         } else
1620 #endif
1621         {
1622                 off_t   pos = sector * dev->sector_size;
1623                 return lseek (arch_specific->fd, pos, SEEK_SET) == pos;
1624         }
1625 }
1626
1627 static int
1628 _read_lastoddsector (const PedDevice* dev, void* buffer)
1629 {
1630         LinuxSpecific*                  arch_specific;
1631         struct blkdev_ioctl_param       ioctl_param;
1632
1633         PED_ASSERT(dev != NULL, return 0);
1634         PED_ASSERT(buffer != NULL, return 0);
1635
1636         arch_specific = LINUX_SPECIFIC (dev);
1637
1638 retry:
1639         ioctl_param.block = 0; /* read the last sector */
1640         ioctl_param.content_length = dev->sector_size;
1641         ioctl_param.block_contents = buffer;
1642
1643         if (ioctl(arch_specific->fd, BLKGETLASTSECT, &ioctl_param) == -1) {
1644                 PedExceptionOption      opt;
1645                 opt = ped_exception_throw (
1646                         PED_EXCEPTION_ERROR,
1647                         PED_EXCEPTION_RETRY_IGNORE_CANCEL,
1648                         _("%s during read on %s"),
1649                         strerror (errno), dev->path);
1650
1651                 if (opt == PED_EXCEPTION_CANCEL)
1652                         return 0;
1653                 if (opt == PED_EXCEPTION_RETRY)
1654                         goto retry;
1655         }
1656
1657         return 1;
1658 }
1659
1660 static int
1661 linux_read (const PedDevice* dev, void* buffer, PedSector start,
1662             PedSector count)
1663 {
1664         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
1665         PedExceptionOption      ex_status;
1666         void*                   diobuf = NULL;
1667
1668         PED_ASSERT (dev != NULL, return 0);
1669         PED_ASSERT (dev->sector_size % PED_SECTOR_SIZE_DEFAULT == 0, return 0);
1670
1671         if (_get_linux_version() < KERNEL_VERSION (2,6,0)) {
1672                 /* Kludge.  This is necessary to read/write the last
1673                    block of an odd-sized disk, until Linux 2.5.x kernel fixes.
1674                 */
1675                 if (dev->type != PED_DEVICE_FILE && (dev->length & 1)
1676                     && start + count - 1 == dev->length - 1)
1677                         return ped_device_read (dev, buffer, start, count - 1)
1678                                 && _read_lastoddsector (
1679                                         dev, (char *) buffer + (count-1) * 512);
1680         }
1681         while (1) {
1682                 if (_device_seek (dev, start))
1683                         break;
1684
1685                 ex_status = ped_exception_throw (
1686                         PED_EXCEPTION_ERROR,
1687                         PED_EXCEPTION_RETRY_IGNORE_CANCEL,
1688                         _("%s during seek for read on %s"),
1689                         strerror (errno), dev->path);
1690
1691                 switch (ex_status) {
1692                         case PED_EXCEPTION_IGNORE:
1693                                 return 1;
1694
1695                         case PED_EXCEPTION_RETRY:
1696                                 break;
1697
1698                         case PED_EXCEPTION_UNHANDLED:
1699                                 ped_exception_catch ();
1700                         case PED_EXCEPTION_CANCEL:
1701                                 return 0;
1702                         default:
1703                                 PED_ASSERT (0, (void) 0);
1704                                 break;
1705                 }
1706         }
1707
1708         size_t read_length = count * dev->sector_size;
1709         if (posix_memalign (&diobuf, dev->sector_size, read_length) != 0)
1710                 return 0;
1711
1712         while (1) {
1713                 ssize_t status = read (arch_specific->fd, diobuf, read_length);
1714                 if (status > 0)
1715                         memcpy(buffer, diobuf, status);
1716                 if (status == (ssize_t) read_length)
1717                         break;
1718                 if (status > 0) {
1719                         read_length -= status;
1720                         buffer = (char *) buffer + status;
1721                         continue;
1722                 }
1723
1724                 ex_status = ped_exception_throw (
1725                         PED_EXCEPTION_ERROR,
1726                         PED_EXCEPTION_RETRY_IGNORE_CANCEL,
1727                         (status == 0
1728                          ? _("end of file while reading %s")
1729                          : _("%s during read on %s")),
1730                         strerror (errno),
1731                         dev->path);
1732
1733                 switch (ex_status) {
1734                         case PED_EXCEPTION_IGNORE:
1735                                 free(diobuf);
1736                                 return 1;
1737
1738                         case PED_EXCEPTION_RETRY:
1739                                 break;
1740
1741                         case PED_EXCEPTION_UNHANDLED:
1742                                 ped_exception_catch ();
1743                         case PED_EXCEPTION_CANCEL:
1744                                 free(diobuf);
1745                                 return 0;
1746                         default:
1747                                 PED_ASSERT (0, (void) 0);
1748                                 break;
1749                 }
1750         }
1751
1752         free (diobuf);
1753
1754         return 1;
1755 }
1756
1757 static int
1758 _write_lastoddsector (PedDevice* dev, const void* buffer)
1759 {
1760         LinuxSpecific*                  arch_specific;
1761         struct blkdev_ioctl_param       ioctl_param;
1762
1763         PED_ASSERT(dev != NULL, return 0);
1764         PED_ASSERT(buffer != NULL, return 0);
1765
1766         arch_specific = LINUX_SPECIFIC (dev);
1767
1768 retry:
1769         ioctl_param.block = 0; /* write the last sector */
1770         ioctl_param.content_length = dev->sector_size;
1771         ioctl_param.block_contents = (void*) buffer;
1772
1773         if (ioctl(arch_specific->fd, BLKSETLASTSECT, &ioctl_param) == -1) {
1774                 PedExceptionOption      opt;
1775                 opt = ped_exception_throw (
1776                         PED_EXCEPTION_ERROR,
1777                         PED_EXCEPTION_RETRY_IGNORE_CANCEL,
1778                         _("%s during write on %s"),
1779                         strerror (errno), dev->path);
1780
1781                 if (opt == PED_EXCEPTION_CANCEL)
1782                         return 0;
1783                 if (opt == PED_EXCEPTION_RETRY)
1784                         goto retry;
1785         }
1786
1787         return 1;
1788 }
1789
1790 static int
1791 linux_write (PedDevice* dev, const void* buffer, PedSector start,
1792              PedSector count)
1793 {
1794         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
1795         PedExceptionOption      ex_status;
1796         void*                   diobuf;
1797         void*                   diobuf_start;
1798
1799         PED_ASSERT(dev->sector_size % PED_SECTOR_SIZE_DEFAULT == 0, return 0);
1800
1801         if (dev->read_only) {
1802                 if (ped_exception_throw (
1803                         PED_EXCEPTION_ERROR,
1804                         PED_EXCEPTION_IGNORE_CANCEL,
1805                         _("Can't write to %s, because it is opened read-only."),
1806                         dev->path)
1807                                 != PED_EXCEPTION_IGNORE)
1808                         return 0;
1809                 else
1810                         return 1;
1811         }
1812
1813         if (_get_linux_version() < KERNEL_VERSION (2,6,0)) {
1814                 /* Kludge.  This is necessary to read/write the last
1815                    block of an odd-sized disk, until Linux 2.5.x kernel fixes.
1816                 */
1817                 if (dev->type != PED_DEVICE_FILE && (dev->length & 1)
1818                     && start + count - 1 == dev->length - 1)
1819                         return ped_device_write (dev, buffer, start, count - 1)
1820                                 && _write_lastoddsector (
1821                                         dev, ((char*) buffer
1822                                               + (count-1) * dev->sector_size));
1823         }
1824         while (1) {
1825                 if (_device_seek (dev, start))
1826                         break;
1827
1828                 ex_status = ped_exception_throw (
1829                         PED_EXCEPTION_ERROR, PED_EXCEPTION_RETRY_IGNORE_CANCEL,
1830                         _("%s during seek for write on %s"),
1831                         strerror (errno), dev->path);
1832
1833                 switch (ex_status) {
1834                         case PED_EXCEPTION_IGNORE:
1835                                 return 1;
1836
1837                         case PED_EXCEPTION_RETRY:
1838                                 break;
1839
1840                         case PED_EXCEPTION_UNHANDLED:
1841                                 ped_exception_catch ();
1842                         case PED_EXCEPTION_CANCEL:
1843                                 return 0;
1844                         default:
1845                                 PED_ASSERT (0, (void) 0);
1846                                 break;
1847                 }
1848         }
1849
1850 #ifdef READ_ONLY
1851         printf ("ped_device_write (\"%s\", %p, %d, %d)\n",
1852                 dev->path, buffer, (int) start, (int) count);
1853 #else
1854         size_t write_length = count * dev->sector_size;
1855         dev->dirty = 1;
1856         if (posix_memalign(&diobuf, dev->sector_size, write_length) != 0)
1857                 return 0;
1858         memcpy(diobuf, buffer, write_length);
1859         diobuf_start = diobuf;
1860         while (1) {
1861                 ssize_t status = write (arch_specific->fd, diobuf, write_length);
1862                 if (status == write_length) break;
1863                 if (status > 0) {
1864                         write_length -= status;
1865                         diobuf = (char *) diobuf + status;
1866                         continue;
1867                 }
1868
1869                 ex_status = ped_exception_throw (
1870                         PED_EXCEPTION_ERROR,
1871                         PED_EXCEPTION_RETRY_IGNORE_CANCEL,
1872                         _("%s during write on %s"),
1873                         strerror (errno), dev->path);
1874
1875                 switch (ex_status) {
1876                         case PED_EXCEPTION_IGNORE:
1877                                 free(diobuf_start);
1878                                 return 1;
1879
1880                         case PED_EXCEPTION_RETRY:
1881                                 break;
1882
1883                         case PED_EXCEPTION_UNHANDLED:
1884                                 ped_exception_catch ();
1885                         case PED_EXCEPTION_CANCEL:
1886                                 free(diobuf_start);
1887                                 return 0;
1888                         default:
1889                                 PED_ASSERT (0, (void) 0);
1890                                 break;
1891                 }
1892         }
1893         free(diobuf_start);
1894 #endif /* !READ_ONLY */
1895         return 1;
1896 }
1897
1898 /* returns the number of sectors that are ok.
1899  */
1900 static PedSector
1901 linux_check (PedDevice* dev, void* buffer, PedSector start, PedSector count)
1902 {
1903         LinuxSpecific*  arch_specific = LINUX_SPECIFIC (dev);
1904         PedSector       done = 0;
1905         int             status;
1906         void*           diobuf;
1907
1908         PED_ASSERT(dev != NULL, return 0);
1909
1910         if (!_device_seek (dev, start))
1911                 return 0;
1912
1913         if (posix_memalign(&diobuf, PED_SECTOR_SIZE_DEFAULT,
1914                            count * PED_SECTOR_SIZE_DEFAULT) != 0)
1915                 return 0;
1916
1917         for (done = 0; done < count; done += status / dev->sector_size) {
1918                 status = read (arch_specific->fd, diobuf,
1919                                (size_t) ((count-done) * dev->sector_size));
1920                 if (status > 0)
1921                         memcpy(buffer, diobuf, status);
1922                 if (status < 0)
1923                         break;
1924         }
1925         free(diobuf);
1926
1927         return done;
1928 }
1929
1930 static int
1931 _do_fsync (PedDevice* dev)
1932 {
1933         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
1934         int                     status;
1935         PedExceptionOption      ex_status;
1936
1937         while (1) {
1938                 status = fsync (arch_specific->fd);
1939                 if (status >= 0) break;
1940
1941                 ex_status = ped_exception_throw (
1942                         PED_EXCEPTION_ERROR,
1943                         PED_EXCEPTION_RETRY_IGNORE_CANCEL,
1944                         _("%s during write on %s"),
1945                         strerror (errno), dev->path);
1946
1947                 switch (ex_status) {
1948                         case PED_EXCEPTION_IGNORE:
1949                                 return 1;
1950
1951                         case PED_EXCEPTION_RETRY:
1952                                 break;
1953
1954                         case PED_EXCEPTION_UNHANDLED:
1955                                 ped_exception_catch ();
1956                         case PED_EXCEPTION_CANCEL:
1957                                 return 0;
1958                         default:
1959                                 PED_ASSERT (0, (void) 0);
1960                                 break;
1961                 }
1962         }
1963         return 1;
1964 }
1965
1966 static int
1967 linux_sync (PedDevice* dev)
1968 {
1969         PED_ASSERT (dev != NULL, return 0);
1970         PED_ASSERT (!dev->external_mode, return 0);
1971
1972         if (dev->read_only)
1973                 return 1;
1974         if (!_do_fsync (dev))
1975                 return 0;
1976         _flush_cache (dev);
1977         return 1;
1978 }
1979
1980 static int
1981 linux_sync_fast (PedDevice* dev)
1982 {
1983         PED_ASSERT (dev != NULL, return 0);
1984         PED_ASSERT (!dev->external_mode, return 0);
1985
1986         if (dev->read_only)
1987                 return 1;
1988         if (!_do_fsync (dev))
1989                 return 0;
1990         /* no cache flush... */
1991         return 1;
1992 }
1993
1994 static inline int
1995 _compare_digit_state (char ch, int need_digit)
1996 {
1997         return !!isdigit (ch) == need_digit;
1998 }
1999
2000 /* matches the regexp "[^0-9]+[0-9]+[^0-9]+[0-9]+$".
2001  * Motivation: accept devices looking like /dev/rd/c0d0, but
2002  * not looking like /dev/hda1 and /dev/rd/c0d0p1
2003  */
2004 static int
2005 _match_rd_device (const char* name)
2006 {
2007         const char* pos;
2008         int state;
2009
2010         /* exclude directory names from test */
2011         pos = strrchr(name, '/') ?: name;
2012
2013         /* states:
2014          *      0       non-digits
2015          *      1       digits
2016          *      2       non-digits
2017          *      3       digits
2018          */
2019         for (state = 0; state < 4; state++) {
2020                 int want_digits = (state % 2 == 1);
2021                 do {
2022                         if (!*pos)
2023                                 return 0;
2024                         if (!_compare_digit_state (*pos, want_digits))
2025                                 return 0;
2026                         pos++;
2027                 } while (_compare_digit_state (*pos, want_digits));
2028         }
2029
2030         return *pos == 0;
2031 }
2032
2033 static int
2034 _probe_proc_partitions ()
2035 {
2036         FILE*           proc_part_file;
2037         int             major, minor, size;
2038         char            buf [512];
2039         char            part_name [256];
2040         char            dev_name [256];
2041
2042         proc_part_file = fopen ("/proc/partitions", "r");
2043         if (!proc_part_file)
2044                 return 0;
2045
2046         if (fgets (buf, 256, proc_part_file) == NULL)
2047                 return 0;
2048
2049         if (fgets (buf, 256, proc_part_file) == NULL)
2050                 return 0;
2051
2052         while (fgets (buf, 512, proc_part_file)
2053                && sscanf (buf, "%d %d %d %255s", &major, &minor, &size,
2054                           part_name) == 4) {
2055                 /* Heuristic for telling partitions and devices apart
2056                  * Probably needs to be improved
2057                  */
2058                 if (!_match_rd_device (part_name)
2059                     && isdigit (part_name [strlen (part_name) - 1]))
2060                         continue;
2061
2062                 strcpy (dev_name, "/dev/");
2063                 strcat (dev_name, part_name);
2064                 _ped_device_probe (dev_name);
2065         }
2066
2067         fclose (proc_part_file);
2068         return 1;
2069 }
2070
2071 struct _entry {
2072         const char *name;
2073         size_t len;
2074 };
2075
2076 static int
2077 _skip_entry (const char *name)
2078 {
2079         struct _entry *i;
2080         static struct _entry entries[] = {
2081                 { ".",          sizeof (".") - 1        },
2082                 { "..",         sizeof ("..") - 1       },
2083                 { "dm-",        sizeof ("dm-") - 1      },
2084                 { "loop",       sizeof ("loop") - 1     },
2085                 { "ram",        sizeof ("ram") - 1      },
2086                 { 0, 0 },
2087         };
2088
2089         for (i = entries; i->name != 0; i++) {
2090                 if (strncmp (name, i->name, i->len) == 0)
2091                         return 1;
2092         }
2093
2094         return 0;
2095 }
2096
2097 static int
2098 _probe_sys_block ()
2099 {
2100         DIR *blockdir;
2101         struct dirent *dirent;
2102         char dev_name [256];
2103         char *ptr;
2104
2105         if (!(blockdir = opendir ("/sys/block")))
2106                 return 0;
2107         while ((dirent = readdir (blockdir))) {
2108                 if (_skip_entry (dirent->d_name))
2109                         continue;
2110
2111                 if (strlen (dirent->d_name) > sizeof (dev_name) - 6)
2112                         continue; /* device name too long! */
2113
2114                 strcpy (dev_name, "/dev/");
2115                 strcat (dev_name, dirent->d_name);
2116                 /* in /sys/block, '/'s are replaced with '!' or '.' */
2117                 for (ptr = dev_name; *ptr != '\0'; ptr++) {
2118                         if (*ptr == '!' || *ptr == '.')
2119                                 *ptr = '/';
2120                 }
2121                 _ped_device_probe (dev_name);
2122         }
2123
2124         closedir (blockdir);
2125         return 1;
2126 }
2127
2128 static int
2129 _probe_standard_devices ()
2130 {
2131         _ped_device_probe ("/dev/hda");
2132         _ped_device_probe ("/dev/hdb");
2133         _ped_device_probe ("/dev/hdc");
2134         _ped_device_probe ("/dev/hdd");
2135         _ped_device_probe ("/dev/hde");
2136         _ped_device_probe ("/dev/hdf");
2137         _ped_device_probe ("/dev/hdg");
2138         _ped_device_probe ("/dev/hdh");
2139
2140         _ped_device_probe ("/dev/sda");
2141         _ped_device_probe ("/dev/sdb");
2142         _ped_device_probe ("/dev/sdc");
2143         _ped_device_probe ("/dev/sdd");
2144         _ped_device_probe ("/dev/sde");
2145         _ped_device_probe ("/dev/sdf");
2146
2147         return 1;
2148 }
2149
2150 static void
2151 linux_probe_all ()
2152 {
2153         /* we should probe the standard devs too, even with /proc/partitions,
2154          * because /proc/partitions might return devfs stuff, and we might not
2155          * have devfs available
2156          */
2157         _probe_standard_devices ();
2158
2159 #ifdef ENABLE_DEVICE_MAPPER
2160         /* device-mapper devices aren't listed in /proc/partitions; or, if
2161          * they are, they're listed as dm-X.  So, instead of relying on that,
2162          * we do our own checks.
2163          */
2164         _probe_dm_devices ();
2165 #endif
2166
2167         /* /sys/block is more reliable and consistent; fall back to using
2168          * /proc/partitions if the former is unavailable, however.
2169          */
2170         if (!_probe_sys_block ())
2171                 _probe_proc_partitions ();
2172 }
2173
2174 static char*
2175 _device_get_part_path (PedDevice* dev, int num)
2176 {
2177         int             path_len = strlen (dev->path);
2178         int             result_len = path_len + 16;
2179         char*           result;
2180
2181         result = (char*) ped_malloc (result_len);
2182         if (!result)
2183                 return NULL;
2184
2185         /* Check for devfs-style /disc => /partN transformation
2186            unconditionally; the system might be using udev with devfs rules,
2187            and if not the test is harmless. */
2188         if (!strcmp (dev->path + path_len - 5, "/disc")) {
2189                 /* replace /disc with /path%d */
2190                 strcpy (result, dev->path);
2191                 snprintf (result + path_len - 5, 16, "/part%d", num);
2192         } else if (dev->type == PED_DEVICE_DAC960
2193                         || dev->type == PED_DEVICE_CPQARRAY
2194                         || dev->type == PED_DEVICE_ATARAID
2195                         || dev->type == PED_DEVICE_DM
2196                         || isdigit (dev->path[path_len - 1]))
2197                 snprintf (result, result_len, "%sp%d", dev->path, num);
2198         else
2199                 snprintf (result, result_len, "%s%d", dev->path, num);
2200
2201         return result;
2202 }
2203
2204 static char*
2205 linux_partition_get_path (const PedPartition* part)
2206 {
2207         return _device_get_part_path (part->disk->dev, part->num);
2208 }
2209
2210 static dev_t
2211 _partition_get_part_dev (const PedPartition* part)
2212 {
2213         struct stat dev_stat;
2214         int dev_major, dev_minor;
2215
2216         if (stat (part->disk->dev->path, &dev_stat))
2217                 return (dev_t)0;
2218         dev_major = major (dev_stat.st_rdev);
2219         dev_minor = minor (dev_stat.st_rdev);
2220         return (dev_t)makedev (dev_major, dev_minor + part->num);
2221 }
2222
2223 static int
2224 _mount_table_search (const char* file_name, dev_t dev)
2225 {
2226         struct stat part_stat;
2227         char line[512];
2228         char part_name[512];
2229         FILE* file;
2230
2231         file = fopen (file_name, "r");
2232         if (!file)
2233                 return 0;
2234         while (fgets (line, 512, file)) {
2235                 if (sscanf (line, "%s", part_name) == 1
2236                     && stat (part_name, &part_stat) == 0) {
2237                         if (part_stat.st_rdev == dev) {
2238                                 fclose (file);
2239                                 return 1;
2240                         }
2241                 }
2242         }
2243         fclose (file);
2244         return 0;
2245 }
2246
2247 static int
2248 _partition_is_mounted_by_dev (dev_t dev)
2249 {
2250         return  _mount_table_search( "/proc/mounts", dev)
2251                 || _mount_table_search( "/proc/swaps", dev)
2252                 || _mount_table_search( "/etc/mtab", dev);
2253 }
2254
2255 static int
2256 _partition_is_mounted_by_path (const char *path)
2257 {
2258         struct stat part_stat;
2259         if (stat (path, &part_stat) != 0)
2260                 return 0;
2261         if (!S_ISBLK(part_stat.st_mode))
2262                 return 0;
2263         return _partition_is_mounted_by_dev (part_stat.st_rdev);
2264 }
2265
2266 static int
2267 _partition_is_mounted (const PedPartition *part)
2268 {
2269         dev_t dev;
2270         if (!ped_partition_is_active (part))
2271                 return 0;
2272         dev = _partition_get_part_dev (part);
2273         if (!dev)
2274                 return 0;
2275         return _partition_is_mounted_by_dev (dev);
2276 }
2277
2278 static int
2279 _has_partitions (const PedDisk* disk)
2280 {
2281         PED_ASSERT(disk != NULL, return 0);
2282
2283         /* Some devices can't be partitioned. */
2284         if (!strcmp (disk->type->name, "loop"))
2285                 return 0;
2286
2287         return 1;
2288 }
2289
2290 static int
2291 linux_partition_is_busy (const PedPartition* part)
2292 {
2293         PedPartition*   walk;
2294
2295         PED_ASSERT (part != NULL, return 0);
2296
2297         if (_partition_is_mounted (part))
2298                 return 1;
2299         if (part->type == PED_PARTITION_EXTENDED) {
2300                 for (walk = part->part_list; walk; walk = walk->next) {
2301                         if (linux_partition_is_busy (walk))
2302                                 return 1;
2303                 }
2304         }
2305         return 0;
2306 }
2307
2308 static int
2309 _blkpg_part_command (PedDevice* dev, struct blkpg_partition* part, int op)
2310 {
2311         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
2312         struct blkpg_ioctl_arg  ioctl_arg;
2313
2314         ioctl_arg.op = op;
2315         ioctl_arg.flags = 0;
2316         ioctl_arg.datalen = sizeof (struct blkpg_partition);
2317         ioctl_arg.data = (void*) part;
2318
2319         return ioctl (arch_specific->fd, BLKPG, &ioctl_arg) == 0;
2320 }
2321
2322 static int
2323 _blkpg_add_partition (PedDisk* disk, const PedPartition *part)
2324 {
2325         struct blkpg_partition  linux_part;
2326         const char*             vol_name;
2327         char*                   dev_name;
2328
2329         PED_ASSERT(disk != NULL, return 0);
2330         PED_ASSERT(disk->dev->sector_size % PED_SECTOR_SIZE_DEFAULT == 0,
2331                    return 0);
2332
2333         if (!_has_partitions (disk))
2334                 return 0;
2335
2336         if (ped_disk_type_check_feature (disk->type,
2337                                          PED_DISK_TYPE_PARTITION_NAME))
2338                 vol_name = ped_partition_get_name (part);
2339         else
2340                 vol_name = NULL;
2341
2342         dev_name = _device_get_part_path (disk->dev, part->num);
2343         if (!dev_name)
2344                 return 0;
2345
2346         memset (&linux_part, 0, sizeof (linux_part));
2347         linux_part.start = part->geom.start * disk->dev->sector_size;
2348         /* see fs/partitions/msdos.c:msdos_partition(): "leave room for LILO" */
2349         if (part->type & PED_PARTITION_EXTENDED)
2350                 linux_part.length = part->geom.length == 1 ? 512 : 1024;
2351         else
2352                 linux_part.length = part->geom.length * disk->dev->sector_size;
2353         linux_part.pno = part->num;
2354         strncpy (linux_part.devname, dev_name, BLKPG_DEVNAMELTH);
2355         if (vol_name)
2356                 strncpy (linux_part.volname, vol_name, BLKPG_VOLNAMELTH);
2357
2358         free (dev_name);
2359
2360         if (!_blkpg_part_command (disk->dev, &linux_part,
2361                                   BLKPG_ADD_PARTITION)) {
2362                 return ped_exception_throw (
2363                         PED_EXCEPTION_ERROR,
2364                         PED_EXCEPTION_IGNORE_CANCEL,
2365                         _("Error informing the kernel about modifications to "
2366                           "partition %s -- %s.  This means Linux won't know "
2367                           "about any changes you made to %s until you reboot "
2368                           "-- so you shouldn't mount it or use it in any way "
2369                           "before rebooting."),
2370                         linux_part.devname,
2371                         strerror (errno),
2372                         linux_part.devname)
2373                                 == PED_EXCEPTION_IGNORE;
2374         }
2375
2376         return 1;
2377 }
2378
2379 static int
2380 _blkpg_remove_partition (PedDisk* disk, int n)
2381 {
2382         struct blkpg_partition  linux_part;
2383
2384         if (!_has_partitions (disk))
2385                 return 0;
2386
2387         memset (&linux_part, 0, sizeof (linux_part));
2388         linux_part.pno = n;
2389         return _blkpg_part_command (disk->dev, &linux_part,
2390                                     BLKPG_DEL_PARTITION);
2391 }
2392
2393 /*
2394  * The number of partitions that a device can have depends on the kernel.
2395  * If we don't find this value in /sys/block/DEV/range, we will use our own
2396  * value.
2397  */
2398 static unsigned int
2399 _device_get_partition_range(PedDevice* dev)
2400 {
2401         int         range, r;
2402         char        path[128];
2403         FILE*       fp;
2404         bool        ok;
2405
2406         r = snprintf(path, sizeof(path), "/sys/block/%s/range",
2407                      last_component(dev->path));
2408         if(r < 0 || r >= sizeof(path))
2409                 return MAX_NUM_PARTS;
2410
2411         fp = fopen(path, "r");
2412         if(!fp)
2413                 return MAX_NUM_PARTS;
2414
2415         ok = fscanf(fp, "%d", &range) == 1;
2416         fclose(fp);
2417
2418         /* (range <= 0) is none sense.*/
2419         return ok && range > 0 ? range : MAX_NUM_PARTS;
2420 }
2421
2422 /*
2423  * Sync the partition table in two step process:
2424  * 1. Remove all of the partitions from the kernel's tables, but do not attempt
2425  *    removal of any partition for which the corresponding ioctl call fails.
2426  * 2. Add all the partitions that we hold in disk, throwing a warning
2427  *    if we cannot because step 1 failed to remove it and it is not being
2428  *    added back with the same start and length.
2429  *
2430  * To achieve this two step process we must calculate the minimum number of
2431  * maximum possible partitions between what linux supports and what the label
2432  * type supports. EX:
2433  *
2434  * number=MIN(max_parts_supported_in_linux,max_parts_supported_in_msdos_tables)
2435  */
2436 static int
2437 _disk_sync_part_table (PedDisk* disk)
2438 {
2439         PED_ASSERT(disk != NULL, return 0);
2440         PED_ASSERT(disk->dev != NULL, return 0);
2441         int lpn;
2442
2443         /* lpn = largest partition number. */
2444         if(ped_disk_get_max_supported_partition_count(disk, &lpn))
2445                 lpn = PED_MIN(lpn, _device_get_partition_range(disk->dev));
2446         else
2447                 lpn = _device_get_partition_range(disk->dev);
2448
2449         /* Its not possible to support largest_partnum < 0.
2450          * largest_partnum == 0 would mean does not support partitions.
2451          * */
2452         if(lpn < 0)
2453                 return 0;
2454         int ret = 0;
2455         int *rets = ped_malloc(sizeof(int) * lpn);
2456         if (!rets)
2457                 return 0;
2458         int *errnums = ped_malloc(sizeof(int) * lpn);
2459         if (!errnums)
2460                 goto free_rets;
2461         int i;
2462
2463         for (i = 1; i <= lpn; i++) {
2464                 rets[i - 1] = _blkpg_remove_partition (disk, i);
2465                 errnums[i - 1] = errno;
2466         }
2467
2468         for (i = 1; i <= lpn; i++) {
2469                 const PedPartition *part = ped_disk_get_partition (disk, i);
2470                 if (part) {
2471                         if (!rets[i - 1] && errnums[i - 1] == EBUSY) {
2472                                 struct hd_geometry geom;
2473                                 int fd;
2474                                 unsigned long long length = 0;
2475                                 /* get start and length of existing partition */
2476                                 char *dev_name = _device_get_part_path (disk->dev, i);
2477                                 if (!dev_name)
2478                                         goto free_errnums;
2479                                 fd = open (dev_name, O_RDONLY);
2480                                 if (fd == -1 ||
2481                                     ioctl (fd, HDIO_GETGEO, &geom) ||
2482                                     ioctl (fd, BLKGETSIZE64, &length)) {
2483                                         ped_exception_throw (
2484                                                              PED_EXCEPTION_BUG,
2485                                                              PED_EXCEPTION_CANCEL,
2486                                                              _("Unable to determine the size and length of %s."),
2487                                                              dev_name);
2488                                         if( fd != -1 )
2489                                                 close (fd);
2490                                         free (dev_name);
2491                                         goto free_errnums;
2492                                 }
2493                                 free (dev_name);
2494                                 length /= disk->dev->sector_size;
2495                                 close (fd);
2496                                 if (geom.start == part->geom.start &&
2497                                     length == part->geom.length)
2498                                         rets[i - 1] = 1;
2499                                 /* if the new partition is unchanged and the existing
2500                                    one was not removed because it was in use, then
2501                                    reset the error flag and skip adding it
2502                                    since it is already there */
2503                                 continue;
2504                         }
2505
2506                         /* add the (possibly modified or new) partition */
2507                         if (!_blkpg_add_partition (disk, part)) {
2508                                 ped_exception_throw (
2509                                         PED_EXCEPTION_ERROR,
2510                                         PED_EXCEPTION_RETRY_CANCEL,
2511                                         _("Failed to add partition %i (%s)"),
2512                                         i, strerror (errno));
2513                                 goto free_errnums;
2514                         }
2515                 }
2516         }
2517
2518         char *parts = ped_malloc (lpn * 5);
2519         if (!parts)
2520                 goto free_errnums;
2521         parts[0] = 0;
2522         /* now warn about any errors */
2523         for (i = 1; i <= lpn; i++)
2524                 if (!rets[i - 1] && errnums[i - 1] != ENXIO)
2525                         sprintf (parts + strlen (parts), "%i, ", i);
2526         if (parts[0]) {
2527                 parts[strlen (parts) - 2] = 0;
2528                 ped_exception_throw (
2529                         PED_EXCEPTION_WARNING,
2530                         PED_EXCEPTION_IGNORE,
2531                         _("Partition(s) %s on %s could not be modified, probably "
2532                           "because it/they is/are in use.  As a result, the old partition(s) "
2533                           "will remain in use until after reboot. You should reboot "
2534                           "now before making further changes."),
2535                         parts, disk->dev->path);
2536         }
2537         free (parts);
2538         ret = 1;
2539  free_errnums:
2540         free (errnums);
2541  free_rets:
2542         free (rets);
2543         return ret;
2544 }
2545
2546 #ifdef ENABLE_DEVICE_MAPPER
2547 static int
2548 _dm_remove_map_name(char *name)
2549 {
2550         struct dm_task  *task = NULL;
2551         int             rc;
2552
2553         task = dm_task_create(DM_DEVICE_REMOVE);
2554         if (!task)
2555                 return 1;
2556
2557         dm_task_set_name (task, name);
2558
2559         rc = dm_task_run(task);
2560         dm_task_update_nodes();
2561         dm_task_destroy(task);
2562         if (!rc)
2563                 return 1;
2564
2565         return 0;
2566 }
2567
2568 static int
2569 _dm_is_part (struct dm_info *this, char *name)
2570 {
2571         struct dm_task* task = NULL;
2572         struct dm_info* info = alloca(sizeof *info);
2573         struct dm_deps* deps = NULL;
2574         int             rc = 0;
2575         unsigned int    i;
2576
2577         task = dm_task_create(DM_DEVICE_DEPS);
2578         if (!task)
2579                 return 0;
2580
2581         dm_task_set_name(task, name);
2582         if (!dm_task_run(task))
2583                 goto err;
2584
2585         memset(info, '\0', sizeof *info);
2586         dm_task_get_info(task, info);
2587         if (!info->exists)
2588                 goto err;
2589
2590         deps = dm_task_get_deps(task);
2591         if (!deps)
2592                 goto err;
2593
2594         for (i = 0; i < deps->count; i++) {
2595                 unsigned int ma = major(deps->device[i]),
2596                              mi = minor(deps->device[i]);
2597
2598                 if (ma == this->major && mi == this->minor)
2599                         rc = 1;
2600         }
2601
2602 err:
2603         dm_task_destroy(task);
2604         return rc;
2605 }
2606
2607 static int
2608 _dm_remove_parts (PedDevice* dev)
2609 {
2610         struct dm_task*         task = NULL;
2611         struct dm_info*         info = alloca(sizeof *info);
2612         struct dm_names*        names = NULL;
2613         unsigned int            next = 0;
2614         int                     rc;
2615         LinuxSpecific*          arch_specific = LINUX_SPECIFIC (dev);
2616
2617         task = dm_task_create(DM_DEVICE_LIST);
2618         if (!task)
2619                 goto err;
2620
2621         if (!dm_task_set_major_minor (task, arch_specific->major,
2622                                       arch_specific->minor, 0))
2623                 goto err;
2624
2625         if (!dm_task_run(task))
2626                 goto err;
2627
2628         memset(info, '\0', sizeof *info);
2629         dm_task_get_info(task, info);
2630         if (!info->exists)
2631                 goto err;
2632
2633         names = dm_task_get_names(task);
2634         if (!names)
2635                 goto err;
2636
2637         rc = 0;
2638         do {
2639                 names = (void *) ((char *) names + next);
2640
2641                 if (_dm_is_part(info, names->name))
2642                         rc += _dm_remove_map_name(names->name);
2643
2644                 next = names->next;
2645         } while (next);
2646
2647         dm_task_update_nodes();
2648         dm_task_destroy(task);
2649         task = NULL;
2650
2651         if (!rc)
2652                 return 1;
2653 err:
2654         if (task)
2655                 dm_task_destroy(task);
2656         ped_exception_throw (PED_EXCEPTION_WARNING, PED_EXCEPTION_IGNORE,
2657                 _("parted was unable to re-read the partition "
2658                   "table on %s (%s).  This means Linux won't know "
2659                   "anything about the modifications you made. "),
2660                 dev->path, strerror (errno));
2661         return 0;
2662 }
2663
2664 static int
2665 _dm_add_partition (PedDisk* disk, PedPartition* part)
2666 {
2667         char*           vol_name = NULL;
2668         const char*     dev_name = NULL;
2669         char*           params = NULL;
2670         LinuxSpecific*  arch_specific = LINUX_SPECIFIC (disk->dev);
2671
2672         if (!_has_partitions(disk))
2673                 return 0;
2674
2675         /* Get map name from devicemapper */
2676         struct dm_task *task = dm_task_create (DM_DEVICE_INFO);
2677         if (!task)
2678                 goto err;
2679
2680         if (!dm_task_set_major_minor (task, arch_specific->major,
2681                                       arch_specific->minor, 0))
2682                 goto err;
2683
2684         if (!dm_task_run(task))
2685                 goto err;
2686
2687         dev_name = dm_task_get_name (task);
2688
2689         if (asprintf (&vol_name, "%sp%d", dev_name, part->num) == -1)
2690                 goto err;
2691
2692         /* Caution: dm_task_destroy frees dev_name.  */
2693         dm_task_destroy (task);
2694         task = NULL;
2695
2696         if (asprintf (&params, "%d:%d %lld", arch_specific->major,
2697                       arch_specific->minor, part->geom.start) == -1)
2698                 goto err;
2699
2700         task = dm_task_create (DM_DEVICE_CREATE);
2701         if (!task)
2702                 goto err;
2703
2704         dm_task_set_name (task, vol_name);
2705         dm_task_add_target (task, 0, part->geom.length,
2706                 "linear", params);
2707         if (dm_task_run (task)) {
2708                 //printf("0 %ld linear %s\n", part->geom.length, params);
2709                 dm_task_update_nodes();
2710                 dm_task_destroy(task);
2711                 free(params);
2712                 free(vol_name);
2713                 return 1;
2714         } else {
2715                 _dm_remove_map_name(vol_name);
2716         }
2717 err:
2718         dm_task_update_nodes();
2719         if (task)
2720                 dm_task_destroy (task);
2721         free (params);
2722         free (vol_name);
2723         return 0;
2724 }
2725
2726 static int
2727 _dm_reread_part_table (PedDisk* disk)
2728 {
2729         int largest_partnum = ped_disk_get_last_partition_num (disk);
2730         if (largest_partnum <= 0)
2731           return 1;
2732
2733         int     rc = 1;
2734         int     last = PED_MIN (largest_partnum, 16);
2735         int     i;
2736
2737         sync();
2738         if (!_dm_remove_parts(disk->dev))
2739                 rc = 0;
2740
2741         for (i = 1; i <= last; i++) {
2742                 PedPartition*      part;
2743
2744                 part = ped_disk_get_partition (disk, i);
2745                 if (!part)
2746                         continue;
2747
2748                 if (!_dm_add_partition (disk, part))
2749                         rc = 0;
2750         }
2751         return rc;
2752 }
2753 #endif
2754
2755 static int
2756 _kernel_reread_part_table (PedDevice* dev)
2757 {
2758         LinuxSpecific*  arch_specific = LINUX_SPECIFIC (dev);
2759         int             retry_count = 9;
2760
2761         sync();
2762         while (ioctl (arch_specific->fd, BLKRRPART)) {
2763                 retry_count--;
2764                 sync();
2765                 if (retry_count == 3)
2766                         sleep(1); /* Pause to allow system to settle */
2767
2768                 if (!retry_count) {
2769                         ped_exception_throw (
2770                                 PED_EXCEPTION_WARNING,
2771                                 PED_EXCEPTION_IGNORE,
2772                         _("WARNING: the kernel failed to re-read the partition "
2773                           "table on %s (%s).  As a result, it may not "
2774                           "reflect all of your changes until after reboot."),
2775                                 dev->path, strerror (errno));
2776                         return 0;
2777                 }
2778         }
2779
2780         return 1;
2781 }
2782
2783 static int
2784 _have_blkpg ()
2785 {
2786         static int have_blkpg = -1;
2787         int kver;
2788
2789         if (have_blkpg != -1)
2790                 return have_blkpg;
2791
2792         kver = _get_linux_version();
2793         return have_blkpg = kver >= KERNEL_VERSION (2,4,0) ? 1 : 0;
2794 }
2795
2796 static int
2797 linux_disk_commit (PedDisk* disk)
2798 {
2799         if (!_has_partitions (disk))
2800                 return 1;
2801
2802 #ifdef ENABLE_DEVICE_MAPPER
2803         if (disk->dev->type == PED_DEVICE_DM)
2804                 return _dm_reread_part_table (disk);
2805 #endif
2806         if (disk->dev->type != PED_DEVICE_FILE) {
2807                 /* The ioctl() command BLKPG_ADD_PARTITION does not notify
2808                  * the devfs system; consequently, /proc/partitions will not
2809                  * be up to date, and the proper links in /dev are not
2810                  * created.  Therefore, if using DevFS, we must get the kernel
2811                  * to re-read and grok the partition table.
2812                  */
2813                 /* Work around kernel dasd problem so we really do BLKRRPART */
2814                 if (disk->dev->type != PED_DEVICE_DASD &&
2815                     _have_blkpg () ) {
2816                         if (_disk_sync_part_table (disk))
2817                                 return 1;
2818                 }
2819
2820                 return _kernel_reread_part_table (disk->dev);
2821         }
2822
2823         return 1;
2824 }
2825
2826 #if USE_BLKID
2827 static PedAlignment*
2828 linux_get_minimum_alignment(const PedDevice *dev)
2829 {
2830         blkid_topology tp = LINUX_SPECIFIC(dev)->topology;
2831         if (!tp)
2832                 return NULL;
2833
2834         if (blkid_topology_get_minimum_io_size(tp) == 0)
2835                 return ped_alignment_new(
2836                         blkid_topology_get_alignment_offset(tp) /
2837                                 dev->sector_size,
2838                         dev->phys_sector_size / dev->sector_size);
2839
2840         return ped_alignment_new(
2841                 blkid_topology_get_alignment_offset(tp) / dev->sector_size,
2842                 blkid_topology_get_minimum_io_size(tp) / dev->sector_size);
2843 }
2844
2845 static PedAlignment*
2846 linux_get_optimum_alignment(const PedDevice *dev)
2847 {
2848         blkid_topology tp = LINUX_SPECIFIC(dev)->topology;
2849         if (!tp)
2850                 return NULL;
2851
2852         /* If optimal_io_size is 0 _and_ alignment_offset is 0 _and_
2853            minimum_io_size is a power of 2 then go with the device.c default */
2854         unsigned long minimum_io_size = blkid_topology_get_minimum_io_size(tp);
2855         if (blkid_topology_get_optimal_io_size(tp) == 0 &&
2856             blkid_topology_get_alignment_offset(tp) == 0 &&
2857             (minimum_io_size & (minimum_io_size - 1)) == 0)
2858                 return NULL;
2859
2860         /* If optimal_io_size is 0 and we don't meet the other criteria
2861            for using the device.c default, return the minimum alignment. */
2862         if (blkid_topology_get_optimal_io_size(tp) == 0)
2863                 return linux_get_minimum_alignment(dev);
2864
2865         return ped_alignment_new(
2866                 blkid_topology_get_alignment_offset(tp) / dev->sector_size,
2867                 blkid_topology_get_optimal_io_size(tp) / dev->sector_size);
2868 }
2869 #endif
2870
2871 static PedDeviceArchOps linux_dev_ops = {
2872         _new:           linux_new,
2873         destroy:        linux_destroy,
2874         is_busy:        linux_is_busy,
2875         open:           linux_open,
2876         refresh_open:   linux_refresh_open,
2877         close:          linux_close,
2878         refresh_close:  linux_refresh_close,
2879         read:           linux_read,
2880         write:          linux_write,
2881         check:          linux_check,
2882         sync:           linux_sync,
2883         sync_fast:      linux_sync_fast,
2884         probe_all:      linux_probe_all,
2885 #if USE_BLKID
2886         get_minimum_alignment:  linux_get_minimum_alignment,
2887         get_optimum_alignment:  linux_get_optimum_alignment,
2888 #endif
2889 };
2890
2891 PedDiskArchOps linux_disk_ops =  {
2892         partition_get_path:     linux_partition_get_path,
2893         partition_is_busy:      linux_partition_is_busy,
2894         disk_commit:            linux_disk_commit
2895 };
2896
2897 PedArchitecture ped_linux_arch = {
2898         dev_ops:        &linux_dev_ops,
2899         disk_ops:       &linux_disk_ops
2900 };