librpc/idl/xattr.idl

   1 #include "idl_types.h"
   2
   3 /*
   4    IDL structures for xattr file attributes
   5
   6    this has nothing to do with RPC, we are just using our NDR/IDL
   7    infrastructure as a convenient way to store linearised information
   8    about a file in a architecture independent manner
   9 */
  10
  11 import "security.idl";
  12
  13 [
  14   uuid("12345778-1234-abcd-0001-00000002"),
  15   version(0.0),
  16   helper("../librpc/ndr/ndr_xattr.h"),
  17   pyhelper("librpc/ndr/py_xattr.c"),
  18   pointer_default(unique)
  19 ]
  20 interface xattr
  21 {
  22         const char *XATTR_DOSATTRIB_NAME = "user.DosAttrib";
  23         const int XATTR_DOSATTRIB_ESTIMATED_SIZE = 64;
  24
  25         /* we store basic dos attributes in a DosAttrib xattr. By
  26            using a union we can cope with new version of this
  27            structure more easily */
  28
  29         /*
  30          * the FFFF level is never really used,
  31          * it's used to pass the information from
  32          * the old hex string attrib information
  33          * we have a handwritten parser which converts
  34          * the hex string to the xattr_DosInfoFFFFCompat strucure
  35          */
  36
  37         typedef struct {
  38                 uint32 attrib;
  39         } xattr_DosInfoFFFFCompat;
  40
  41         typedef struct {
  42                 uint32 attrib;
  43                 uint32 ea_size;
  44                 udlong size;
  45                 udlong alloc_size;
  46                 NTTIME create_time;
  47                 NTTIME change_time;
  48         } xattr_DosInfo1;
  49
  50 /*
  51         We use xattrDosInfo1 again when we store values.
  52         Because the sticky write time is now stored in the opendb
  53         and xattr_DosInfo2Old is only present to parse existing
  54         values from disk.
  55
  56         const int XATTR_ATTRIB_FLAG_STICKY_WRITE_TIME = 0x1;
  57 */
  58         typedef struct {
  59                 uint32     flags;
  60                 uint32     attrib;
  61                 uint32     ea_size;
  62                 udlong     size;
  63                 udlong     alloc_size;
  64                 NTTIME     create_time;
  65                 NTTIME     change_time;
  66                 NTTIME     write_time; /* only used when sticky write time is set */
  67                 utf8string name;
  68         } xattr_DosInfo2Old;
  69
  70         typedef [bitmap32bit] bitmap {
  71                 XATTR_DOSINFO_ATTRIB            = 0x00000001,
  72                 XATTR_DOSINFO_EA_SIZE           = 0x00000002,
  73                 XATTR_DOSINFO_SIZE              = 0x00000004,
  74                 XATTR_DOSINFO_ALLOC_SIZE        = 0x00000008,
  75                 XATTR_DOSINFO_CREATE_TIME       = 0x00000010,
  76                 XATTR_DOSINFO_CHANGE_TIME       = 0x00000020
  77         } xattr_DosInfoValidFlags;
  78
  79         typedef struct {
  80                 xattr_DosInfoValidFlags valid_flags;
  81                 uint32 attrib;
  82                 uint32 ea_size;
  83                 udlong size;
  84                 udlong alloc_size;
  85                 NTTIME create_time;
  86                 NTTIME change_time;
  87         } xattr_DosInfo3;
  88
  89         typedef [public,switch_type(uint16)] union {
  90                 [case(0xFFFF)] xattr_DosInfoFFFFCompat compatinfoFFFF;
  91                 [case(1)] xattr_DosInfo1 info1;
  92                 [case(2)] xattr_DosInfo2Old oldinfo2;
  93                 [case(3)] xattr_DosInfo3 info3;
  94         } xattr_DosInfo;
  95
  96         typedef [public] struct {
  97                 uint16 version;
  98                 [switch_is(version)] xattr_DosInfo info;
  99         } xattr_DosAttrib;
 100
 101         typedef [public,nopush,nopull,noprint] struct {
 102                 astring attrib_hex;
 103                 uint16 version;
 104                 [switch_is(version)] xattr_DosInfo info;
 105         } xattr_DOSATTRIB;
 106
 107         void xattr_parse_DOSATTRIB(
 108                 [in] xattr_DOSATTRIB x
 109         );
 110
 111         /* we store DOS style extended attributes in a DosEAs xattr */
 112         const char *XATTR_DOSEAS_NAME = "user.DosEAs";
 113
 114         typedef struct {
 115                 utf8string name;
 116                 DATA_BLOB value;
 117         } xattr_EA;
 118
 119         typedef [public] struct {
 120                 uint16 num_eas;
 121                 [size_is(num_eas)] xattr_EA *eas;
 122         } xattr_DosEAs;
 123
 124         /* Slightly different version, used by the vfs_xattr_tdb module */
 125         typedef [public] struct {
 126                 uint32 num_eas;
 127                 xattr_EA eas[num_eas];
 128         } tdb_xattrs;
 129
 130         /* we store stream information in this xattr structure. Then
 131            the streams themselves are stored in
 132            user.DosStream.STREAMNAME or in external files, according
 133            to the flags */
 134         const char *XATTR_DOSSTREAMS_NAME = "user.DosStreams";
 135
 136         const int XATTR_STREAM_FLAG_INTERNAL = 0x00000001;
 137
 138         /* stream data is stored in attributes with the given prefix */
 139         const char *XATTR_DOSSTREAM_PREFIX = "user.DosStream.";
 140
 141         const int XATTR_MAX_STREAM_SIZE     = 0x4000;
 142         const int XATTR_MAX_STREAM_SIZE_TDB = 0x100000;
 143
 144         typedef struct {
 145                 uint32     flags;
 146                 udlong     size;
 147                 udlong     alloc_size;
 148                 utf8string name;
 149         } xattr_DosStream;
 150
 151         typedef [public] struct {
 152                 uint32 num_streams;
 153                 [size_is(num_streams)] xattr_DosStream *streams;
 154         } xattr_DosStreams;
 155
 156
 157         /* we store the NT ACL a NTACL xattr. It is versioned so we
 158            can later add other acl attribs (such as posix acl mapping)
 159
 160            we put this xattr in the security namespace to ensure that
 161            only trusted users can write to the ACL
 162
 163            stored in "security.NTACL"
 164
 165            Version 1. raw SD stored as Samba4 does it.
 166            Version 2. raw SD + last changed hash so we
 167                       can discard if this doesn't match the underlying ACL hash.
 168         */
 169
 170         const char *XATTR_NTACL_NAME = "security.NTACL";
 171
 172         const int XATTR_SD_HASH_SIZE = 64;
 173         const int XATTR_SD_HASH_TYPE_NONE = 0x0;
 174         const int XATTR_SD_HASH_TYPE_SHA256 = 0x1;
 175
 176         typedef [public] struct {
 177                 security_descriptor *sd;
 178                 uint8 hash[16];
 179         } security_descriptor_hash_v2; /* Hash never used in this version. */
 180
 181         typedef [public] struct {
 182                 security_descriptor *sd;
 183                 uint16 hash_type;
 184                 uint8 hash[64]; /* 64 bytes hash. */
 185         } security_descriptor_hash_v3;
 186
 187         typedef [public] struct {
 188                 security_descriptor *sd;
 189                 uint16 hash_type;
 190                 uint8 hash[64]; /* 64 bytes hash. */
 191                 utf8string description; /* description of what created
 192                                          * this hash (to allow
 193                                          * foresnics later, if we have
 194                                          * a bug in one codepath */
 195                 NTTIME time;
 196                 uint8 sys_acl_hash[64]; /* 64 bytes hash. */
 197         } security_descriptor_hash_v4;
 198
 199         typedef [switch_type(uint16)] union {
 200                 [case(1)] security_descriptor *sd;
 201                 [case(2)] security_descriptor_hash_v2 *sd_hs2;
 202                 [case(3)] security_descriptor_hash_v3 *sd_hs3;
 203                 [case(4)] security_descriptor_hash_v4 *sd_hs4;
 204         } xattr_NTACL_Info;
 205
 206         typedef [public] struct {
 207                 uint16 version;
 208                 [switch_is(version)] xattr_NTACL_Info info;
 209         } xattr_NTACL;
 210
 211         /*
 212          * A wrapper of the common information required to be in the
 213          * hash of the ACL, for the acl_xattr and acl_tdb modules.
 214          */
 215         [public] typedef struct {
 216                 DATA_BLOB acl_as_blob;
 217                 uid_t owner;
 218                 gid_t group;
 219                 mode_t mode;
 220         } xattr_sys_acl_hash_wrapper;
 221
 222 }