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163 lines
3.7 KiB
C
163 lines
3.7 KiB
C
/* $NetBSD: readufs.h,v 1.3 2015/08/23 04:56:20 dholland Exp $ */
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/* from Id: readufs.h,v 1.10 2003/12/16 13:54:11 itohy Exp */
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/*
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* Written in 1999, 2002, 2003 by ITOH Yasufumi.
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* Public domain.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/lfs/ulfs_dinode.h>
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#include <ufs/ufs/dir.h>
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/*
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* UFS1 / UFS2
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*/
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union ufs_dinode {
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#ifdef USE_UFS1
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struct ufs1_dinode di1;
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#endif
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#ifdef USE_UFS2
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struct ufs2_dinode di2;
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#endif
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#ifdef USE_LFS
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struct lfs32_dinode dil32;
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#endif
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};
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/* For more compact code and independence on 64-bit types and ops */
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typedef uint32_t ino32_t;
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/* short-cut for common fields (di_mode, di_nlink) */
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#ifdef USE_UFS1
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# define di_common di1
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#elif defined USE_UFS2
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# define di_common di2
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#endif
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/* for fields of same names and different locations */
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#if !(defined(USE_UFS1) && defined(USE_UFS2))
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# ifdef USE_UFS1
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# define di_thisver di1
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# endif
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# ifdef USE_UFS2
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# define di_thisver di2
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# endif
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#endif
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/* this is a size hack */
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#if defined(USE_UFS1) && defined(USE_UFS2)
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# define DI_SIZE(di) ((di)->di1.di_size)
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#else
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# define DI_SIZE(di) ((di)->di_thisver.di_size)
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#endif
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/* and may break following fields on UFS2 */
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#define di_gid di_gid__is_not_available
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#define di_blksize di_blksize__is_not_available
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/*
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* filesystem information
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*/
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struct ufs_info {
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enum ufs_fstype {
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UFSTYPE_UNKNOWN
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#ifdef USE_FFS
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, UFSTYPE_FFS
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#endif
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#ifdef USE_LFS
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, UFSTYPE_LFS
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#endif
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} fstype;
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#if defined(USE_UFS1) && defined(USE_UFS2)
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enum ufs_ufstype {
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UFSTYPE_UFS1, UFSTYPE_UFS2
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} ufstype;
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#endif
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#if 0
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int (*get_inode)(ino32_t ino, union ufs_dinode *dibuf);
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#endif
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/* superblock information */
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uint32_t bsize; /* fs block size */
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uint32_t nindir; /* # indirect per block */
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uint32_t fsbtodb; /* block -> sector shift count */
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union {
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#ifdef USE_FFS
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struct {
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daddr_t iblkno; /* inode-block offset */
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int32_t old_cgoffset; /* cylinder group offset */
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int32_t old_cgmask; /* cylinder group mask */
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int32_t fragshift; /* block to fragmentation */
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int32_t inopb; /* # inodes per block */
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int32_t ipg; /* # inodes per group */
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int32_t fpg; /* # inodes per group * frag */
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int32_t magic; /* FS_UFSx_MAGIC */
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} u_ffs;
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#endif
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#ifdef USE_LFS
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struct {
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uint32_t version; /* LFS version # */
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daddr_t idaddr; /* ifile inode disk address */
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uint32_t inopb; /* inodes per block (v1) */
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/* inodes per frag (v2) */
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uint32_t ifpb; /* inode addrs / ifile block */
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uint32_t ioffset; /* start of inode in ifile */
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/* (in sector) */
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uint32_t ibsize; /* size of inode block */
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} u_lfs;
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#endif
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} fs_u;
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};
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extern struct ufs_info ufs_info;
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int get_ffs_inode(ino32_t ino, union ufs_dinode *dibuf);
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int get_lfs_inode(ino32_t ino, union ufs_dinode *dibuf);
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#if defined(USE_FFS) && defined(USE_LFS)
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#define ufs_get_inode(ino, di) ((ufs_info.fstype == UFSTYPE_FFS) ? \
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get_ffs_inode((ino), (di)) : get_lfs_inode((ino), (di)))
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#else
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# ifdef USE_FFS
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# define ufs_get_inode(ino, di) (get_ffs_inode((ino), (di)))
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# endif
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# ifdef USE_LFS
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# define ufs_get_inode(ino, di) (get_lfs_inode((ino), (di)))
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# endif
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#endif
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void RAW_READ(void *buf, daddr_t blkpos, size_t bytelen);
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size_t ufs_read(union ufs_dinode *di, void *buf, unsigned off,
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size_t count);
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ino32_t ufs_lookup(ino32_t dirino, const char *fn);
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ino32_t ufs_lookup_path(const char *path);
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size_t ufs_load_file(void *buf, ino32_t dirino, const char *fn);
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int ufs_init(void);
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#ifdef USE_FFS
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int try_ffs(void);
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#endif
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#ifdef USE_LFS
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int try_lfs(void);
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#endif
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#ifdef DEBUG_WITH_STDIO
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#include <fcntl.h>
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#include <err.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#endif
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#ifdef __GNUC__
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# ifndef alloca
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# define alloca(n) __builtin_alloca(n)
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# endif
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# ifndef strcmp
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# define strcmp(p, q) __builtin_strcmp(p, q)
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# endif
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#endif
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