1/* $NetBSD: readufs.h,v 1.12 2013/06/18 18:18:58 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. 6 * Public domain. 7 */ 8 9#include <sys/types.h> 10#include <sys/param.h> 11#ifdef USE_LFS 12#include <ufs/lfs/lfs.h> 13#endif 14#include <ufs/ufs/dinode.h> 15#include <ufs/lfs/lfs.h> 16#include <ufs/ufs/dir.h> 17 18/* 19 * UFS1 / UFS2 20 */ 21union ufs_dinode { 22#ifdef USE_UFS1 23 struct ufs1_dinode di1; 24#endif 25#ifdef USE_UFS2 26 struct ufs2_dinode di2; 27#endif 28#ifdef USE_LFS 29 struct lfs32_dinode dil32; 30#endif 31}; 32 33/* For more compact code and independence on 64-bit types and ops */ 34typedef uint32_t ino32_t; 35 36/* short-cut for common fields (di_mode, di_nlink) */ 37#ifdef USE_UFS1 38# define di_common di1 39#elif defined USE_UFS2 40# define di_common di2 41#endif 42 43/* for fields of same names and different locations */ 44#if !(defined(USE_UFS1) && defined(USE_UFS2)) 45# ifdef USE_UFS1 46# define di_thisver di1 47# endif 48# ifdef USE_UFS2 49# define di_thisver di2 50# endif 51#endif 52 53/* this is a size hack */ 54#if defined(USE_UFS1) && defined(USE_UFS2) 55# define DI_SIZE(di) ((di)->di1.di_size) 56#else 57# define DI_SIZE(di) ((di)->di_thisver.di_size) 58#endif 59/* and may break following fields on UFS2 */ 60#define di_gid di_gid__is_not_available 61#define di_blksize di_blksize__is_not_available 62 63/* 64 * filesystem information 65 */ 66struct ufs_info { 67 enum ufs_fstype { 68 UFSTYPE_UNKNOWN 69#ifdef USE_FFS 70 , UFSTYPE_FFS 71#endif 72#ifdef USE_LFS 73 , UFSTYPE_LFS 74#endif 75 } fstype; 76#if defined(USE_UFS1) && defined(USE_UFS2) 77 enum ufs_ufstype { 78 UFSTYPE_UFS1, UFSTYPE_UFS2 79 } ufstype; 80#endif 81 int (*get_inode)(ino32_t ino, union ufs_dinode *dibuf); 82 83 /* superblock information */ 84 u_int32_t bsize; /* fs block size */ 85 u_int32_t nindir; /* # indirect per block */ 86 u_int32_t fsbtodb; /* block -> sector shift count */ 87 union { 88#ifdef USE_FFS 89 struct { 90 daddr_t iblkno; /* inode-block offset */ 91 int32_t old_cgoffset; /* cylinder group offset */ 92 int32_t old_cgmask; /* cylinder group mask */ 93 int32_t fragshift; /* block to fragmentation */ 94 int32_t inopb; /* # inodes per block */ 95 int32_t ipg; /* # inodes per group */ 96 int32_t fpg; /* # inodes per group * frag */ 97 int32_t magic; /* FS_UFSx_MAGIC */ 98 } u_ffs; 99#endif 100#ifdef USE_LFS 101 struct { 102 u_int32_t version; /* LFS version # */ 103 daddr_t idaddr; /* ifile inode disk address */ 104 u_int32_t inopb; /* inodes per block (v1) */ 105 /* inodes per frag (v2) */ 106 u_int32_t ifpb; /* inode addrs / ifile block */ 107 u_int32_t ioffset; /* start of inode in ifile */ 108 /* (in sector) */ 109 u_int32_t ibsize; /* size of inode block */ 110 } u_lfs; 111#endif 112 } fs_u; 113}; 114 115extern struct ufs_info ufs_info; 116#define ufs_get_inode(ino, di) ((*ufs_info.get_inode)((ino), (di))) 117 118void RAW_READ(void *buf, daddr_t blkpos, size_t bytelen); 119 120size_t ufs_read(union ufs_dinode *di, void *buf, unsigned off, 121 size_t count); 122ino32_t ufs_lookup(ino32_t dirino, const char *fn); 123ino32_t ufs_lookup_path(const char *path); 124size_t ufs_load_file(void *buf, ino32_t dirino, const char *fn); 125int ufs_init(void); 126 127#ifdef USE_FFS 128int try_ffs(void); 129#endif 130 131#ifdef USE_LFS 132int try_lfs(void); 133#endif 134 135#ifdef DEBUG_WITH_STDIO 136#include <fcntl.h> 137#include <err.h> 138#include <stdio.h> 139#include <unistd.h> 140#include <stdlib.h> 141#endif 142 143#ifdef __GNUC__ 144# ifndef alloca 145# define alloca(n) __builtin_alloca(n) 146# endif 147# ifndef strcmp 148# define strcmp(p, q) __builtin_strcmp(p, q) 149# endif 150#endif 151