linux/rock.h

   1 // this file was borrowed from linux kernel
   2 // originally it has name /usr/src/linux/fs/isofs/rock.h
   3 // unfortunately there was no copyright header on it,
   4 // so i`m assume it have copyrighted under terms of
   5 // GNU GENERAL PUBLIC LICENSE version 2
   6 // as a whole linux kernel
   7 // copy of this license included into fuseiso
   8 // distribution in file COPYING
   9
  10
  11 /* These structs are used by the system-use-sharing protocol, in which the
  12    Rock Ridge extensions are embedded.  It is quite possible that other
  13    extensions are present on the disk, and this is fine as long as they
  14    all use SUSP */
  15
  16 struct SU_SP{
  17   unsigned char magic[2];
  18   unsigned char skip;
  19 } __attribute__((packed));
  20
  21 struct SU_CE{
  22   char extent[8];
  23   char offset[8];
  24   char size[8];
  25 };
  26
  27 struct SU_ER{
  28   unsigned char len_id;
  29   unsigned char len_des;
  30   unsigned char len_src;
  31   unsigned char ext_ver;
  32   char data[0];
  33 } __attribute__((packed));
  34
  35 struct RR_RR{
  36   char flags[1];
  37 } __attribute__((packed));
  38
  39 struct RR_PX{
  40   char mode[8];
  41   char n_links[8];
  42   char uid[8];
  43   char gid[8];
  44 };
  45
  46 struct RR_PN{
  47   char dev_high[8];
  48   char dev_low[8];
  49 };
  50
  51
  52 struct SL_component{
  53   unsigned char flags;
  54   unsigned char len;
  55   char text[0];
  56 } __attribute__((packed));
  57
  58 struct RR_SL{
  59   unsigned char flags;
  60   struct SL_component link;
  61 } __attribute__((packed));
  62
  63 struct RR_NM{
  64   unsigned char flags;
  65   char name[0];
  66 } __attribute__((packed));
  67
  68 struct RR_CL{
  69   char location[8];
  70 };
  71
  72 struct RR_PL{
  73   char location[8];
  74 };
  75
  76 struct stamp{
  77   char time[7];
  78 } __attribute__((packed));
  79
  80 struct RR_TF{
  81   char flags;
  82   struct stamp times[0];  /* Variable number of these beasts */
  83 } __attribute__((packed));
  84
  85 /* Linux-specific extension for transparent decompression */
  86 struct RR_ZF{
  87   char algorithm[2];
  88   char parms[2];
  89   char real_size[8];
  90 };
  91
  92 /* These are the bits and their meanings for flags in the TF structure. */
  93 #define TF_CREATE 1
  94 #define TF_MODIFY 2
  95 #define TF_ACCESS 4
  96 #define TF_ATTRIBUTES 8
  97 #define TF_BACKUP 16
  98 #define TF_EXPIRATION 32
  99 #define TF_EFFECTIVE 64
 100 #define TF_LONG_FORM 128
 101
 102 struct rock_ridge{
 103   char signature[2];
 104   unsigned char len;
 105   unsigned char version;
 106   union{
 107     struct SU_SP SP;
 108     struct SU_CE CE;
 109     struct SU_ER ER;
 110     struct RR_RR RR;
 111     struct RR_PX PX;
 112     struct RR_PN PN;
 113     struct RR_SL SL;
 114     struct RR_NM NM;
 115     struct RR_CL CL;
 116     struct RR_PL PL;
 117     struct RR_TF TF;
 118     struct RR_ZF ZF;
 119   } u;
 120 };
 121
 122 #define RR_PX 1   /* POSIX attributes */
 123 #define RR_PN 2   /* POSIX devices */
 124 #define RR_SL 4   /* Symbolic link */
 125 #define RR_NM 8   /* Alternate Name */
 126 #define RR_CL 16  /* Child link */
 127 #define RR_PL 32  /* Parent link */
 128 #define RR_RE 64  /* Relocation directory */
 129 #define RR_TF 128 /* Timestamps */