include/pt-sun.h

   1 /*
   2  * No copyright is claimed.  This code is in the public domain; do with
   3  * it what you wish.
   4  */
   5 #ifndef UTIL_LINUX_PT_SUN_H
   6 #define UTIL_LINUX_PT_SUN_H
   7
   8 #include <stdint.h>
   9
  10 #define SUN_LABEL_MAGIC         0xDABE
  11
  12 /* Supported VTOC setting */
  13 #define SUN_VTOC_SANITY         0x600DDEEE      /* magic number */
  14 #define SUN_VTOC_VERSION        1
  15 #define SUN_MAXPARTITIONS       8
  16
  17 struct sun_disklabel {
  18         unsigned char label_id[128];   /* Informative text string */
  19
  20         struct sun_vtoc {
  21                 uint32_t version;     /* version */
  22                 char     volume_id[8];/* volume name */
  23                 uint16_t nparts;      /* num of partitions */
  24
  25                 struct sun_info {        /* partition information */
  26                         uint16_t id;     /* SUN_TAG_*  */
  27                         uint16_t flags;  /* SUN_FLAG_* */
  28                 } __attribute__ ((packed)) infos[8];
  29
  30                 uint16_t padding;      /* padding */
  31                 uint32_t bootinfo[3];  /* info needed by mboot */
  32                 uint32_t sanity;       /* magic number */
  33                 uint32_t reserved[10]; /* padding */
  34                 uint32_t timestamp[8]; /* partition timestamp */
  35         } __attribute__ ((packed)) vtoc;
  36
  37         uint32_t write_reinstruct;     /* sectors to skip, writes */
  38         uint32_t read_reinstruct;      /* sectors to skip, reads */
  39         unsigned char spare[148];      /* padding */
  40         uint16_t rpm;                  /* disk rotational speed */
  41         uint16_t pcyl;                 /* physical cylinder count */
  42         uint16_t apc;                  /* extra sects per cylinder */
  43         uint16_t obs1;
  44         uint16_t obs2;
  45         uint16_t intrlv;               /* interleave factor */
  46         uint16_t ncyl;                 /* data cylinder count */
  47         uint16_t acyl;                 /* alt. cylinder count */
  48         uint16_t nhead;                /* tracks per cylinder   <---- */
  49         uint16_t nsect;                /* sectors per track     <---- */
  50         uint16_t obs3;
  51         uint16_t obs4;
  52
  53         struct sun_partition {         /* partitions */
  54                 uint32_t start_cylinder;
  55                 uint32_t num_sectors;
  56         } __attribute__ ((packed)) partitions[8];
  57
  58         uint16_t magic;                /* magic number */
  59         uint16_t csum;                 /* label xor'd checksum */
  60 } __attribute__ ((packed));
  61
  62
  63 #define SUN_TAG_UNASSIGNED      0x00    /* Unassigned partition */
  64 #define SUN_TAG_BOOT            0x01    /* Boot partition       */
  65 #define SUN_TAG_ROOT            0x02    /* Root filesystem      */
  66 #define SUN_TAG_SWAP            0x03    /* Swap partition       */
  67 #define SUN_TAG_USR             0x04    /* /usr filesystem      */
  68 #define SUN_TAG_WHOLEDISK       0x05    /* Full-disk slice      */
  69 #define SUN_TAG_STAND           0x06    /* Stand partition      */
  70 #define SUN_TAG_VAR             0x07    /* /var filesystem      */
  71 #define SUN_TAG_HOME            0x08    /* /home filesystem     */
  72 #define SUN_TAG_ALTSCTR         0x09    /* Alt sector partition */
  73 #define SUN_TAG_CACHE           0x0a    /* Cachefs partition    */
  74 #define SUN_TAG_RESERVED        0x0b    /* SMI reserved data    */
  75 #define SUN_TAG_LINUX_SWAP      0x82    /* Linux SWAP           */
  76 #define SUN_TAG_LINUX_NATIVE    0x83    /* Linux filesystem     */
  77 #define SUN_TAG_LINUX_LVM       0x8e    /* Linux LVM            */
  78 #define SUN_TAG_LINUX_RAID      0xfd    /* LInux RAID           */
  79
  80 #define SUN_FLAG_UNMNT          0x01    /* Unmountable partition*/
  81 #define SUN_FLAG_RONLY          0x10    /* Read only            */
  82
  83 static inline uint16_t sun_pt_checksum(const struct sun_disklabel *label)
  84 {
  85         const uint16_t *ptr = ((const uint16_t *) (label + 1)) - 1;
  86         uint16_t sum;
  87
  88         for (sum = 0; ptr >= ((const uint16_t *) label);)
  89                 sum ^= *ptr--;
  90
  91         return sum;
  92 }
  93
  94 #endif /* UTIL_LINUX_PT_SUN_H */