1 /* $NetBSD: readufs.h,v 1.3 2015/08/23 04:56:20 dholland Exp $ */ 2 /* from Id: readufs.h,v 1.10 2003/12/16 13:54:11 itohy Exp */ 3 4 /* 5 * Written in 1999, 2002, 2003 by ITOH Yasufumi. 6 * Public domain. 7 */ 8 9 #include <sys/types.h> 10 #include <sys/param.h> 11 #include <ufs/ufs/dinode.h> 12 #include <ufs/lfs/ulfs_dinode.h> 13 #include <ufs/ufs/dir.h> 14 15 /* 16 * UFS1 / UFS2 17 */ 18 union ufs_dinode { 19 #ifdef USE_UFS1 20 struct ufs1_dinode di1; 21 #endif 22 #ifdef USE_UFS2 23 struct ufs2_dinode di2; 24 #endif 25 #ifdef USE_LFS 26 struct lfs32_dinode dil32; 27 #endif 28 }; 29 30 /* For more compact code and independence on 64-bit types and ops */ 31 typedef uint32_t ino32_t; 32 33 /* short-cut for common fields (di_mode, di_nlink) */ 34 #ifdef USE_UFS1 35 # define di_common di1 36 #elif defined USE_UFS2 37 # define di_common di2 38 #endif 39 40 /* for fields of same names and different locations */ 41 #if !(defined(USE_UFS1) && defined(USE_UFS2)) 42 # ifdef USE_UFS1 43 # define di_thisver di1 44 # endif 45 # ifdef USE_UFS2 46 # define di_thisver di2 47 # endif 48 #endif 49 50 /* this is a size hack */ 51 #if defined(USE_UFS1) && defined(USE_UFS2) 52 # define DI_SIZE(di) ((di)->di1.di_size) 53 #else 54 # define DI_SIZE(di) ((di)->di_thisver.di_size) 55 #endif 56 /* and may break following fields on UFS2 */ 57 #define di_gid di_gid__is_not_available 58 #define di_blksize di_blksize__is_not_available 59 60 /* 61 * filesystem information 62 */ 63 struct ufs_info { 64 enum ufs_fstype { 65 UFSTYPE_UNKNOWN 66 #ifdef USE_FFS 67 , UFSTYPE_FFS 68 #endif 69 #ifdef USE_LFS 70 , UFSTYPE_LFS 71 #endif 72 } fstype; 73 #if defined(USE_UFS1) && defined(USE_UFS2) 74 enum ufs_ufstype { 75 UFSTYPE_UFS1, UFSTYPE_UFS2 76 } ufstype; 77 #endif 78 #if 0 79 int (*get_inode)(ino32_t ino, union ufs_dinode *dibuf); 80 #endif 81 82 /* superblock information */ 83 uint32_t bsize; /* fs block size */ 84 uint32_t nindir; /* # indirect per block */ 85 uint32_t fsbtodb; /* block -> sector shift count */ 86 union { 87 #ifdef USE_FFS 88 struct { 89 daddr_t iblkno; /* inode-block offset */ 90 int32_t old_cgoffset; /* cylinder group offset */ 91 int32_t old_cgmask; /* cylinder group mask */ 92 int32_t fragshift; /* block to fragmentation */ 93 int32_t inopb; /* # inodes per block */ 94 int32_t ipg; /* # inodes per group */ 95 int32_t fpg; /* # inodes per group * frag */ 96 int32_t magic; /* FS_UFSx_MAGIC */ 97 } u_ffs; 98 #endif 99 #ifdef USE_LFS 100 struct { 101 uint32_t version; /* LFS version # */ 102 daddr_t idaddr; /* ifile inode disk address */ 103 uint32_t inopb; /* inodes per block (v1) */ 104 /* inodes per frag (v2) */ 105 uint32_t ifpb; /* inode addrs / ifile block */ 106 uint32_t ioffset; /* start of inode in ifile */ 107 /* (in sector) */ 108 uint32_t ibsize; /* size of inode block */ 109 } u_lfs; 110 #endif 111 } fs_u; 112 }; 113 114 extern struct ufs_info ufs_info; 115 116 int get_ffs_inode(ino32_t ino, union ufs_dinode *dibuf); 117 int get_lfs_inode(ino32_t ino, union ufs_dinode *dibuf); 118 #if defined(USE_FFS) && defined(USE_LFS) 119 #define ufs_get_inode(ino, di) ((ufs_info.fstype == UFSTYPE_FFS) ? \ 120 get_ffs_inode((ino), (di)) : get_lfs_inode((ino), (di))) 121 #else 122 # ifdef USE_FFS 123 # define ufs_get_inode(ino, di) (get_ffs_inode((ino), (di))) 124 # endif 125 # ifdef USE_LFS 126 # define ufs_get_inode(ino, di) (get_lfs_inode((ino), (di))) 127 # endif 128 #endif 129 130 void RAW_READ(void *buf, daddr_t blkpos, size_t bytelen); 131 132 size_t ufs_read(union ufs_dinode *di, void *buf, unsigned off, 133 size_t count); 134 ino32_t ufs_lookup(ino32_t dirino, const char *fn); 135 ino32_t ufs_lookup_path(const char *path); 136 size_t ufs_load_file(void *buf, ino32_t dirino, const char *fn); 137 int ufs_init(void); 138 139 #ifdef USE_FFS 140 int try_ffs(void); 141 #endif 142 143 #ifdef USE_LFS 144 int try_lfs(void); 145 #endif 146 147 #ifdef DEBUG_WITH_STDIO 148 #include <fcntl.h> 149 #include <err.h> 150 #include <stdio.h> 151 #include <unistd.h> 152 #include <stdlib.h> 153 #endif 154 155 #ifdef __GNUC__ 156 # ifndef alloca 157 # define alloca(n) __builtin_alloca(n) 158 # endif 159 # ifndef strcmp 160 # define strcmp(p, q) __builtin_strcmp(p, q) 161 # endif 162 #endif 163