inode.c revision 99222 
1/*
2 * Copyright (c) 2002 Juli Mallett.  All rights reserved.
3 *
4 * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
5 * FreeBSD project.  Redistribution and use in source and binary forms, with
6 * or without modification, are permitted provided that the following
7 * conditions are met:
8 *
9 * 1. Redistribution of source code must retain the above copyright notice,
10 *    this list of conditions and the following disclaimer.
11 * 2. Redistribution in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: head/lib/libufs/inode.c 99222 2002-07-01 18:19:20Z jmallett $");
30
31#include <sys/param.h>
32#include <sys/mount.h>
33#include <sys/disklabel.h>
34#include <sys/stat.h>
35
36#include <ufs/ufs/ufsmount.h>
37#include <ufs/ufs/dinode.h>
38#include <ufs/ffs/fs.h>
39
40#include <errno.h>
41#include <fcntl.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <unistd.h>
46
47#include <libufs.h>
48
49int
50getino(struct uufsd *disk, void **dino, ino_t inode, int *mode)
51{
52	ino_t min, max;
53	caddr_t inoblock;
54	struct ufs1_dinode *dp1;
55	struct ufs2_dinode *dp2;
56	struct fs *fs;
57
58	DEBUG(NULL);
59
60	fs = &disk->d_fs;
61	inoblock = disk->d_inoblock;
62	min = disk->d_inomin;
63	max = disk->d_inomax;
64
65	if (inoblock == NULL) {
66		inoblock = malloc(fs->fs_bsize);
67		if (inoblock == NULL) {
68			DEBUG(NULL);
69			return -1;
70		}
71		disk->d_inoblock = inoblock;
72	}
73	if (inode >= min && inode < max)
74		goto gotit;
75	bread(disk, fsbtodb(fs, ino_to_fsba(fs, inode)), inoblock,
76	    fs->fs_bsize);
77	min = inode - (inode & INOPB(fs));
78	max = min + INOPB(fs);
79gotit:	switch (disk->d_ufs) {
80	case 1:
81		dp1 = &((struct ufs1_dinode *)inoblock)[inode - min];
82		*mode = dp1->di_mode & IFMT;
83		*dino = dp1;
84		return 0;
85	case 2:
86		dp2 = &((struct ufs2_dinode *)inoblock)[inode - min];
87		*mode = dp2->di_mode & IFMT;
88		*dino = dp2;
89		return 0;
90	default:
91		break;
92	}
93	DEBUG("unknown UFS filesystem");
94	return -1;
95}
96