sys/arch/x68k/stand/boot_ufs/readufs.h

   1 /*      $NetBSD: readufs.h,v 1.8 2005/12/11 12:19:44 christos Exp $     */
   2 /*      from Id: readufs.h,v 1.9 2003/10/15 14:16:58 itohy Exp  */
   3
   4 /*
   5  * Written in 1999, 2002, 2003 by ITOH Yasufumi (itohy@NetBSD.org).
   6  * Public domain.
   7  */
   8
   9 #include <sys/types.h>
  10 #include <sys/param.h>
  11 #include <ufs/ufs/dinode.h>
  12 #include <ufs/ufs/dir.h>
  13
  14 /*
  15  * UFS1 / UFS2
  16  */
  17 union ufs_dinode {
  18 #ifdef USE_UFS1
  19         struct ufs1_dinode di1;
  20 #endif
  21 #ifdef USE_UFS2
  22         struct ufs2_dinode di2;
  23 #endif
  24 };
  25
  26 /* For more compact code and independence on 64-bit types and ops */
  27 typedef uint32_t        ino32_t;
  28
  29 /* short-cut for common fields (di_mode, di_nlink) */
  30 #ifdef USE_UFS1
  31 # define di_common      di1
  32 #elif defined USE_UFS2
  33 # define di_common      di2
  34 #endif
  35
  36 /* for fields of same names and different locations */
  37 #if !(defined(USE_UFS1) && defined(USE_UFS2))
  38 # ifdef USE_UFS1
  39 #  define di_thisver    di1
  40 # endif
  41 # ifdef USE_UFS2
  42 #  define di_thisver    di2
  43 # endif
  44 #endif
  45
  46 /* this is a size hack */
  47 #if defined(USE_UFS1) && defined(USE_UFS2)
  48 # define DI_SIZE(di)    ((di)->di1.di_size)
  49 #else
  50 # define DI_SIZE(di)    ((di)->di_thisver.di_size)
  51 #endif
  52 /* and may break following fields on UFS2 */
  53 #define di_gid          di_gid__is_not_available
  54 #define di_blksize      di_blksize__is_not_available
  55
  56 /*
  57  * filesystem information
  58  */
  59 struct ufs_info {
  60         enum ufs_fstype {
  61                 UFSTYPE_UNKNOWN
  62 #ifdef USE_FFS
  63                 , UFSTYPE_FFS
  64 #endif
  65 #ifdef USE_LFS
  66                 , UFSTYPE_LFS
  67 #endif
  68         } fstype;
  69 #if defined(USE_UFS1) && defined(USE_UFS2)
  70         enum ufs_ufstype {
  71                 UFSTYPE_UFS1, UFSTYPE_UFS2
  72         } ufstype;
  73 #endif
  74         int (*get_inode)(ino32_t ino, union ufs_dinode *dibuf);
  75
  76         /* superblock information */
  77         u_int32_t bsize;        /* fs block size */
  78         u_int32_t nindir;       /* # indirect per block */
  79         u_int32_t fsbtodb;      /* block -> sector shift count */
  80         union {
  81 #ifdef USE_FFS
  82                 struct {
  83                         daddr_t iblkno;         /* inode-block offset */
  84                         int32_t old_cgoffset;   /* cylinder group offset */
  85                         int32_t old_cgmask;     /* cylinder group mask */
  86                         int32_t fragshift;      /* block to fragmentation */
  87                         int32_t inopb;          /* # inodes per block */
  88                         int32_t ipg;            /* # inodes per group */
  89                         int32_t fpg;            /* # inodes per group * frag */
  90                         int32_t magic;          /* FS_UFSx_MAGIC */
  91                 } u_ffs;
  92 #endif
  93 #ifdef USE_LFS
  94                 struct {
  95                         u_int32_t version;      /* LFS version # */
  96                         daddr_t idaddr;         /* ifile inode disk address */
  97                         u_int32_t inopb;        /* inodes per block (v1) */
  98                                                 /* inodes per frag (v2) */
  99                         u_int32_t ifpb;         /* inode addrs / ifile block */
 100                         u_int32_t ioffset;      /* start of inode in ifile */
 101                                                 /* (in sector) */
 102                         u_int32_t ibsize;       /* size of inode block */
 103                 } u_lfs;
 104 #endif
 105         } fs_u;
 106 };
 107
 108 extern struct ufs_info  ufs_info;
 109 #define ufs_get_inode(ino, di)  ((*ufs_info.get_inode)((ino), (di)))
 110
 111 void RAW_READ(void *buf, daddr_t blkpos, size_t bytelen);
 112
 113 size_t ufs_read(union ufs_dinode *di, void *buf, unsigned off,
 114     size_t count);
 115 ino32_t ufs_lookup(ino32_t dirino, const char *fn);
 116 ino32_t ufs_lookup_path(const char *path);
 117 size_t ufs_load_file(void *buf, ino32_t dirino, const char *fn);
 118 int ufs_init(void);
 119
 120 #ifdef USE_FFS
 121 int try_ffs(void);
 122 #endif
 123
 124 #ifdef USE_LFS
 125 int try_lfs(void);
 126 #endif
 127
 128 #ifdef DEBUG_WITH_STDIO
 129 #include <fcntl.h>
 130 #include <err.h>
 131 #include <stdio.h>
 132 #include <unistd.h>
 133 #include <stdlib.h>
 134 #endif
 135
 136 #ifdef __GNUC__
 137 # ifndef alloca
 138 #  define alloca(n)     __builtin_alloca(n)
 139 # endif
 140 # ifndef strcmp
 141 #  define strcmp(p, q)  __builtin_strcmp(p, q)
 142 # endif
 143 #endif