compat/include/bsdcompat.h

   1 /*
   2  *      Ported to Linux's Second Extended File System as part of the
   3  *      dump and restore backup suit
   4  *      Remy Card <card@Linux.EU.Org>, 1994-1997
   5  *      Stelian Pop <stelian@popies.net>, 1999-2000
   6  *      Stelian Pop <stelian@popies.net> - Alcôve <www.alcove.com>, 2000-2002
   7  *
   8  *      $Id: bsdcompat.h,v 1.17 2002/06/10 14:05:00 stelian Exp $
   9  */
  10
  11 #include <config.h>
  12 #include <sys/time.h>
  13 #include <dirent.h>
  14
  15 #define __dead          volatile
  16
  17 #ifndef NBBY
  18 #define NBBY            8
  19 #endif
  20
  21 #ifndef MIN
  22 #define MIN(a,b)        ((a < b) ? a : b)
  23 #endif
  24
  25 #define WINO            1
  26 #define DEV_BSIZE       512
  27 #define DEV_BSHIFT      9
  28 #define MAXBSIZE        EXT2_MAX_BLOCK_SIZE
  29 #define ROOTINO         EXT2_ROOT_INO
  30 #ifdef  EXT2_NODUMP_FL
  31 #define UF_NODUMP       EXT2_NODUMP_FL
  32 #endif
  33
  34 #define howmany(x,y)    (((x)+((y)-1))/(y))
  35 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
  36 #define powerof2(x)     ((((x)-1)&(x))==0)
  37
  38 #define dbtob(b)        ((unsigned)(b) << DEV_BSHIFT)
  39 #define fsbtodb(sb,b)   ((int)(((long long)(b) * EXT2_BLOCK_SIZE((sb)->super)) / DEV_BSIZE))
  40 #define dbtofsb(sb,b)   ((int)(((long long)(b) * DEV_BSIZE) / EXT2_BLOCK_SIZE((sb)->super)))
  41
  42 #define sblock          fs
  43 #define fs_fsize        fragsize
  44 #define fs_bsize        blocksize
  45 #define fs_size         super->s_blocks_count
  46
  47 #define IFMT            S_IFMT
  48 #define IFLNK           S_IFLNK
  49 #define IFREG           S_IFREG
  50 #define IFDIR           S_IFDIR
  51 #define IFCHR           S_IFCHR
  52 #define IFBLK           S_IFBLK
  53 #define IFSOCK          S_IFSOCK
  54 #define IFIFO           S_IFIFO
  55
  56 #if 0
  57 typedef __s64           quad_t;
  58 typedef __u64           u_quad_t;
  59 #endif
  60
  61 /*
  62  * The BSD dump format reserves 4 bytes for a time_t, but other architectures
  63  * (notably axp) have larger time_t.  ctime4() is a modified ctime() which
  64  * always accepts short 4-byte times.
  65  */
  66 #define ctime4(timep) ({ time_t t = *(timep); ctime(&t); })
  67
  68 /*
  69  * This is the ext2_inode structure but the fields have been renamed
  70  * to match 4.4BSD's names
  71  */
  72 #define NDADDR          12
  73 #define NIADDR           3
  74
  75 #define NINDIR(fs)      EXT2_ADDR_PER_BLOCK(fs->super)
  76
  77 struct dinode {
  78         __u16   di_mode;
  79         __u16   di_uid;
  80         __u32   di_size;
  81         __u32   di_atime;
  82         __u32   di_ctime;
  83         __u32   di_mtime;
  84         __u32   di_dtime;
  85         __u16   di_gid;
  86         __u16   di_nlink;
  87         __u32   di_blocks;
  88         __u32   di_flags;
  89         __u32   di_reserved1;
  90         daddr_t di_db[NDADDR];
  91         daddr_t di_ib[NIADDR];
  92         __u32   di_gen;
  93         __u32   di_file_acl;
  94         __u32   di_dir_acl;
  95         __u32   di_faddr;
  96         __u8    di_frag;
  97         __u8    di_fsize;
  98         __u16   di_pad1;
  99         __u32   di_spare[2];
 100 };
 101
 102 #define di_rdev         di_db[0]
 103 /* #define di_ouid              di_uid */
 104 /* #define di_ogid              di_gid */
 105 #define di_size_high    di_dir_acl
 106
 107 /*
 108  * This is the ext2_dir_entry structure but the fields have been renamed
 109  * to match 4.4BSD's names
 110  *
 111  * This is the 4.4BSD directory entry structure
 112  */
 113 #define DIRBLKSIZ       DEV_BSIZE
 114 #ifndef MAXNAMLEN
 115 #define MAXNAMLEN       255
 116 #endif
 117
 118 /*
 119  * For old libc.
 120  */
 121 #ifndef DT_UNKNOWN
 122 #define DT_UNKNOWN       0
 123 #define DT_FIFO          1
 124 #define DT_CHR           2
 125 #define DT_DIR           4
 126 #define DT_BLK           6
 127 #define DT_REG           8
 128 #define DT_LNK          10
 129 #define DT_SOCK         12
 130 #endif
 131
 132 #ifndef d_fileno
 133 #define d_fileno d_ino
 134 #endif
 135
 136 /*
 137  * This is the direct structure used by dump. In needs to be
 138  * different from direct because linux dump generates only
 139  * 'old inode format' dumps. And BSD supposes that the old
 140  * inode dumps have the d_namelen field written in machine byte
 141  * order...
 142  */
 143 struct olddirect {
 144         __u32   d_ino;
 145         __u16   d_reclen;
 146         __u16   d_namlen;
 147         char    d_name[MAXNAMLEN + 1];
 148 };
 149
 150 /*
 151  * The direct structure used by restore.
 152  */
 153 struct direct {
 154         __u32   d_ino;
 155         __u16   d_reclen;
 156         __u8    d_type;
 157         __u8    d_namlen;
 158         char    d_name[MAXNAMLEN + 1];
 159 };
 160 /*
 161  * Convert between stat structure types and directory types.
 162  */
 163 #define IFTODT(mode)    (((mode) & 0170000) >> 12)
 164 #define DTTOIF(dirtype) ((dirtype) << 12)
 165
 166 /*
 167  * The DIRSIZ macro gives the minimum record length which will hold
 168  * the directory entry.  This requires the amount of space in struct direct
 169  * without the d_name field, plus enough space for the name with a terminating
 170  * null byte (dp->d_namlen+1), rounded up to a 4 byte boundary.
 171  */
 172 #if     0
 173 #if (BYTE_ORDER == LITTLE_ENDIAN)
 174 #define DIRSIZ(oldfmt, dp) \
 175     ((oldfmt) ? \
 176     ((sizeof (struct direct) - (MAXNAMLEN+1)) + (((dp)->d_type+1 + 3) &~ 3)) : \
 177     ((sizeof (struct direct) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3)))
 178 #else
 179 #define DIRSIZ(oldfmt, dp) \
 180     ((sizeof (struct direct) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))
 181 #endif
 182 #else
 183
 184 #define DIRSIZ(oldfmt,dp)       EXT2_DIR_REC_LEN(((dp)->d_namlen & 0xff) + 1)
 185
 186 #endif
 187
 188 /*
 189  * This is the old (Net/2) BSD inode structure
 190  * copied from the FreeBSD 1.1.5.1 <ufs/dinode.h> include file
 191  */
 192 #define MAXFASTLINK     (((NDADDR + NIADDR) * sizeof(unsigned long)) - 1)
 193
 194 struct old_bsd_inode {
 195         __u16           di_mode;
 196         __s16           di_nlink;
 197         __u16           di_uid;
 198         __u16           di_gid;
 199 #if     1
 200         union {
 201                 u_quad_t        v;
 202                 __u32           val[2];
 203         }               di_qsize;
 204 #else
 205         u_quad_t        di_size;
 206 #endif
 207         __u32           di_atime;
 208         __s32           di_atspare;
 209         __u32           di_mtime;
 210         __s32           di_mtspare;
 211         __u32           di_ctime;
 212         __s32           di_ctspare;
 213 #if     0
 214         union {
 215                 struct {
 216                         daddr_t di_udb[NDADDR];
 217                         daddr_t di_uib[NIADDR];
 218                 } di_addr;
 219                 char    di_usymlink[MAXFASTLINK + 1];
 220         }               di_un;
 221 #else
 222         daddr_t         di_db[NDADDR];
 223         daddr_t         di_ib[NIADDR];
 224 #endif
 225         __s32           di_flags;
 226         __s32           di_blocks;
 227         __s32           di_gen;
 228         __u32           di_spare[4];
 229 };
 230
 231 struct bsdtimeval {    /* XXX alpha-*-linux is deviant */
 232         __u32   tv_sec;
 233         __u32   tv_usec;
 234 };
 235
 236 /*
 237  * This is the new (4.4) BSD inode structure
 238  * copied from the FreeBSD 2.0 <ufs/ufs/dinode.h> include file
 239  */
 240 struct new_bsd_inode {
 241         __u16           di_mode;
 242         __s16           di_nlink;
 243         union {
 244                 __u16           oldids[2];
 245                 __u32           inumber;
 246         }               di_u;
 247         u_quad_t        di_size;
 248         struct bsdtimeval       di_atime;
 249         struct bsdtimeval       di_mtime;
 250         struct bsdtimeval       di_ctime;
 251         daddr_t         di_db[NDADDR];
 252         daddr_t         di_ib[NIADDR];
 253         __u32           di_flags;
 254         __s32           di_blocks;
 255         __s32           di_gen;
 256         __u32           di_uid;
 257         __u32           di_gid;
 258         __s32           di_spare[2];
 259 };
 260
 261 #define di_ouid         di_u.oldids[0]
 262 #define di_ogid         di_u.oldids[1]