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: stable/11/lib/libufs/inode.c 332638 2018-04-17 00:03:32Z mckusick $");
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	ERROR(disk, NULL);
59
60	fs = &disk->d_fs;
61	if (inode >= (ino_t)fs->fs_ipg * fs->fs_ncg) {
62		ERROR(disk, "inode number out of range");
63		return (-1);
64	}
65	inoblock = disk->d_inoblock;
66	min = disk->d_inomin;
67	max = disk->d_inomax;
68
69	if (inoblock == NULL) {
70		inoblock = malloc(fs->fs_bsize);
71		if (inoblock == NULL) {
72			ERROR(disk, "unable to allocate inode block");
73			return (-1);
74		}
75		disk->d_inoblock = inoblock;
76	}
77	if (inode >= min && inode < max)
78		goto gotit;
79	bread(disk, fsbtodb(fs, ino_to_fsba(fs, inode)), inoblock,
80	    fs->fs_bsize);
81	disk->d_inomin = min = inode - (inode % INOPB(fs));
82	disk->d_inomax = max = min + INOPB(fs);
83gotit:	switch (disk->d_ufs) {
84	case 1:
85		dp1 = &((struct ufs1_dinode *)inoblock)[inode - min];
86		if (mode != NULL)
87			*mode = dp1->di_mode & IFMT;
88		if (dino != NULL)
89			*dino = dp1;
90		return (0);
91	case 2:
92		dp2 = &((struct ufs2_dinode *)inoblock)[inode - min];
93		if (mode != NULL)
94			*mode = dp2->di_mode & IFMT;
95		if (dino != NULL)
96			*dino = dp2;
97		return (0);
98	default:
99		break;
100	}
101	ERROR(disk, "unknown UFS filesystem type");
102	return (-1);
103}
104
105int
106putino(struct uufsd *disk)
107{
108	struct fs *fs;
109
110	fs = &disk->d_fs;
111	if (disk->d_inoblock == NULL) {
112		ERROR(disk, "No inode block allocated");
113		return (-1);
114	}
115	if (bwrite(disk, fsbtodb(fs, ino_to_fsba(&disk->d_fs, disk->d_inomin)),
116	    disk->d_inoblock, disk->d_fs.fs_bsize) <= 0)
117		return (-1);
118	return (0);
119}
120