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 <pop@noos.fr>, 1999-2000
   6  *      Stelian Pop <pop@noos.fr> - Alcôve <www.alcove.fr>, 2000
   7  *
   8  *      $Id: bsdcompat.h,v 1.15 2001/03/20 10:02:48 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
  41 #define sblock          fs
  42 #define fs_fsize        fragsize
  43 #define fs_bsize        blocksize
  44 #define fs_size         super->s_blocks_count
  45
  46 #define IFMT            S_IFMT
  47 #define IFLNK           S_IFLNK
  48 #define IFREG           S_IFREG
  49 #define IFDIR           S_IFDIR
  50 #define IFCHR           S_IFCHR
  51 #define IFBLK           S_IFBLK
  52 #define IFSOCK          S_IFSOCK
  53 #define IFIFO           S_IFIFO
  54
  55 #if 0
  56 typedef __s64           quad_t;
  57 typedef __u64           u_quad_t;
  58 #endif
  59
  60 /*
  61  * The BSD dump format reserves 4 bytes for a time_t, but other architectures
  62  * (notably axp) have larger time_t.  ctime4() is a modified ctime() which
  63  * always accepts short 4-byte times.
  64  */
  65 #define ctime4(timep) ({ time_t t = *(timep); ctime(&t); })
  66
  67 /*
  68  * This is the ext2_inode structure but the fields have been renamed
  69  * to match 4.4BSD's names
  70  */
  71 #define NDADDR          12
  72 #define NIADDR           3
  73
  74 #define NINDIR(fs)      EXT2_ADDR_PER_BLOCK(fs->super)
  75
  76 struct dinode {
  77         __u16   di_mode;
  78         __u16   di_uid;
  79         __u32   di_size;
  80         __u32   di_atime;
  81         __u32   di_ctime;
  82         __u32   di_mtime;
  83         __u32   di_dtime;
  84         __u16   di_gid;
  85         __u16   di_nlink;
  86         __u32   di_blocks;
  87         __u32   di_flags;
  88         __u32   di_reserved1;
  89         daddr_t di_db[NDADDR];
  90         daddr_t di_ib[NIADDR];
  91         __u32   di_gen;
  92         __u32   di_file_acl;
  93         __u32   di_dir_acl;
  94         __u32   di_faddr;
  95         __u8    di_frag;
  96         __u8    di_fsize;
  97         __u16   di_pad1;
  98         __u32   di_spare[2];
  99 };
 100
 101 #define di_rdev         di_db[0]
 102 /* #define di_ouid              di_uid */
 103 /* #define di_ogid              di_gid */
 104 #define di_size_high    di_dir_acl
 105
 106 /*
 107  * This is the ext2_dir_entry structure but the fields have been renamed
 108  * to match 4.4BSD's names
 109  *
 110  * This is the 4.4BSD directory entry structure
 111  */
 112 #define DIRBLKSIZ       DEV_BSIZE
 113 #ifndef MAXNAMLEN
 114 #define MAXNAMLEN       255
 115 #endif
 116
 117 /*
 118  * For old libc.
 119  */
 120 #ifndef DT_UNKNOWN
 121 #define DT_UNKNOWN       0
 122 #define DT_FIFO          1
 123 #define DT_CHR           2
 124 #define DT_DIR           4
 125 #define DT_BLK           6
 126 #define DT_REG           8
 127 #define DT_LNK          10
 128 #define DT_SOCK         12
 129 #endif
 130
 131 #ifndef d_fileno
 132 #define d_fileno d_ino
 133 #endif
 134
 135 /*
 136  * This is the direct structure used by dump. In needs to be
 137  * different from direct because linux dump generates only
 138  * 'old inode format' dumps. And BSD supposes that the old
 139  * inode dumps have the d_namelen field written in machine byte
 140  * order...
 141  */
 142 struct olddirect {
 143         __u32   d_ino;
 144         __u16   d_reclen;
 145         __u16   d_namlen;
 146         char    d_name[MAXNAMLEN + 1];
 147 };
 148
 149 /*
 150  * The direct structure used by restore.
 151  */
 152 struct direct {
 153         __u32   d_ino;
 154         __u16   d_reclen;
 155         __u8    d_type;
 156         __u8    d_namlen;
 157         char    d_name[MAXNAMLEN + 1];
 158 };
 159 /*
 160  * Convert between stat structure types and directory types.
 161  */
 162 #define IFTODT(mode)    (((mode) & 0170000) >> 12)
 163 #define DTTOIF(dirtype) ((dirtype) << 12)
 164
 165 /*
 166  * The DIRSIZ macro gives the minimum record length which will hold
 167  * the directory entry.  This requires the amount of space in struct direct
 168  * without the d_name field, plus enough space for the name with a terminating
 169  * null byte (dp->d_namlen+1), rounded up to a 4 byte boundary.
 170  */
 171 #if     0
 172 #if (BYTE_ORDER == LITTLE_ENDIAN)
 173 #define DIRSIZ(oldfmt, dp) \
 174     ((oldfmt) ? \
 175     ((sizeof (struct direct) - (MAXNAMLEN+1)) + (((dp)->d_type+1 + 3) &~ 3)) : \
 176     ((sizeof (struct direct) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3)))
 177 #else
 178 #define DIRSIZ(oldfmt, dp) \
 179     ((sizeof (struct direct) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))
 180 #endif
 181 #else
 182
 183 #define DIRSIZ(oldfmt,dp)       EXT2_DIR_REC_LEN(((dp)->d_namlen & 0xff) + 1)
 184
 185 #endif
 186
 187 /*
 188  * This is the old (Net/2) BSD inode structure
 189  * copied from the FreeBSD 1.1.5.1 <ufs/dinode.h> include file
 190  */
 191 #define MAXFASTLINK     (((NDADDR + NIADDR) * sizeof(unsigned long)) - 1)
 192
 193 struct old_bsd_inode {
 194         __u16           di_mode;
 195         __s16           di_nlink;
 196         __u16           di_uid;
 197         __u16           di_gid;
 198 #if     1
 199         union {
 200                 u_quad_t        v;
 201                 __u32           val[2];
 202         }               di_qsize;
 203 #else
 204         u_quad_t        di_size;
 205 #endif
 206         __u32           di_atime;
 207         __s32           di_atspare;
 208         __u32           di_mtime;
 209         __s32           di_mtspare;
 210         __u32           di_ctime;
 211         __s32           di_ctspare;
 212 #if     0
 213         union {
 214                 struct {
 215                         daddr_t di_udb[NDADDR];
 216                         daddr_t di_uib[NIADDR];
 217                 } di_addr;
 218                 char    di_usymlink[MAXFASTLINK + 1];
 219         }               di_un;
 220 #else
 221         daddr_t         di_db[NDADDR];
 222         daddr_t         di_ib[NIADDR];
 223 #endif
 224         __s32           di_flags;
 225         __s32           di_blocks;
 226         __s32           di_gen;
 227         __u32           di_spare[4];
 228 };
 229
 230 struct bsdtimeval {    /* XXX alpha-*-linux is deviant */
 231         __u32   tv_sec;
 232         __u32   tv_usec;
 233 };
 234
 235 /*
 236  * This is the new (4.4) BSD inode structure
 237  * copied from the FreeBSD 2.0 <ufs/ufs/dinode.h> include file
 238  */
 239 struct new_bsd_inode {
 240         __u16           di_mode;
 241         __s16           di_nlink;
 242         union {
 243                 __u16           oldids[2];
 244                 __u32           inumber;
 245         }               di_u;
 246         u_quad_t        di_size;
 247         struct bsdtimeval       di_atime;
 248         struct bsdtimeval       di_mtime;
 249         struct bsdtimeval       di_ctime;
 250         daddr_t         di_db[NDADDR];
 251         daddr_t         di_ib[NIADDR];
 252         __u32           di_flags;
 253         __s32           di_blocks;
 254         __s32           di_gen;
 255         __u32           di_uid;
 256         __u32           di_gid;
 257         __s32           di_spare[2];
 258 };
 259
 260 #define di_ouid         di_u.oldids[0]
 261 #define di_ogid         di_u.oldids[1]