2 * Copyright (c) 2002 McAfee, Inc.
5 * This software was developed for the FreeBSD Project by Marshall
6 * Kirk McKusick and McAfee Research,, the Security Research Division of
7 * McAfee, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as
8 * part of the DARPA CHATS research program
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * Copyright (c) 1998 Robert Nordier
33 * All rights reserved.
35 * Redistribution and use in source and binary forms are freely
36 * permitted provided that the above copyright notice and this
37 * paragraph and the following disclaimer are duplicated in all
40 * This software is provided "AS IS" and without any express or
41 * implied warranties, including, without limitation, the implied
42 * warranties of merchantability and fitness for a particular
46 #include <sys/cdefs.h>
47 __FBSDID("$FreeBSD$");
49 #include <ufs/ufs/dinode.h>
50 #include <ufs/ufs/dir.h>
51 #include <ufs/ffs/fs.h>
52 #ifdef UFS_SMALL_CGBASE
53 /* XXX: Revert to old (broken for over 1.5Tb filesystems) version of cgbase
54 (see sys/ufs/ffs/fs.h rev 1.39) so that small boot loaders (e.g. boot2) can
55 support both UFS1 and UFS2. */
57 #define cgbase(fs, c) ((ufs2_daddr_t)((fs)->fs_fpg * (c)))
61 * We use 4k `virtual' blocks for filesystem data, whatever the actual
62 * filesystem block size. FFS blocks are always a multiple of 4k.
65 #define VBLKSIZE (1 << VBLKSHIFT)
66 #define VBLKMASK (VBLKSIZE - 1)
67 #define DBPERVBLK (VBLKSIZE / DEV_BSIZE)
68 #define INDIRPERVBLK(fs) (NINDIR(fs) / ((fs)->fs_bsize >> VBLKSHIFT))
69 #define IPERVBLK(fs) (INOPB(fs) / ((fs)->fs_bsize >> VBLKSHIFT))
70 #define INO_TO_VBA(fs, ipervblk, x) \
71 (fsbtodb(fs, cgimin(fs, ino_to_cg(fs, x))) + \
72 (((x) % (fs)->fs_ipg) / (ipervblk) * DBPERVBLK))
73 #define INO_TO_VBO(ipervblk, x) ((x) % ipervblk)
74 #define FS_TO_VBA(fs, fsb, off) (fsbtodb(fs, fsb) + \
75 ((off) / VBLKSIZE) * DBPERVBLK)
76 #define FS_TO_VBO(fs, fsb, off) ((off) & VBLKMASK)
78 /* Buffers that must not span a 64k boundary. */
80 char blkbuf[VBLKSIZE]; /* filesystem blocks */
81 char indbuf[VBLKSIZE]; /* indir blocks */
82 char sbbuf[SBLOCKSIZE]; /* superblock */
83 char secbuf[DEV_BSIZE]; /* for MBR/disklabel */
85 static struct dmadat *dmadat;
87 static ino_t lookup(const char *);
88 static ssize_t fsread(ino_t, void *, size_t);
90 static int ls, dsk_meta;
91 static uint32_t fs_off;
94 fsfind(const char *name, ino_t * ino)
102 while ((n = fsread(*ino, buf, DEV_BSIZE)) > 0)
103 for (s = buf; s < buf + DEV_BSIZE;) {
106 printf("%s ", d->d_name);
107 else if (!strcmp(name, d->d_name)) {
119 lookup(const char *path)
121 char name[MAXNAMLEN + 1];
136 for (s = path; *s && *s != '/'; s++);
137 if ((n = s - path) > MAXNAMLEN)
139 ls = *path == '?' && n == 1 && !*s;
140 memcpy(name, path, n);
143 printf("%s: not a directory.\n", name);
146 if ((dt = fsfind(name, &ino)) <= 0)
150 return dt == DT_REG ? ino : 0;
154 * Possible superblock locations ordered from most to least likely.
156 static int sblock_try[] = SBLOCKSEARCH;
158 #if defined(UFS2_ONLY)
159 #define DIP(field) dp2.field
160 #elif defined(UFS1_ONLY)
161 #define DIP(field) dp1.field
163 #define DIP(field) fs->fs_magic == FS_UFS1_MAGIC ? dp1.field : dp2.field
167 fsread(ino_t inode, void *buf, size_t nbyte)
170 static struct ufs1_dinode dp1;
173 static struct ufs2_dinode dp2;
180 size_t n, nb, size, off, vboff;
182 ufs2_daddr_t addr, vbaddr;
183 static ufs2_daddr_t blkmap, indmap;
187 blkbuf = dmadat->blkbuf;
188 indbuf = dmadat->indbuf;
189 fs = (struct fs *)dmadat->sbbuf;
192 for (n = 0; sblock_try[n] != -1; n++) {
193 if (dskread(fs, sblock_try[n] / DEV_BSIZE,
194 SBLOCKSIZE / DEV_BSIZE))
197 #if defined(UFS1_ONLY)
198 fs->fs_magic == FS_UFS1_MAGIC
199 #elif defined(UFS2_ONLY)
200 (fs->fs_magic == FS_UFS2_MAGIC &&
201 fs->fs_sblockloc == sblock_try[n])
203 fs->fs_magic == FS_UFS1_MAGIC ||
204 (fs->fs_magic == FS_UFS2_MAGIC &&
205 fs->fs_sblockloc == sblock_try[n])
208 fs->fs_bsize <= MAXBSIZE &&
209 fs->fs_bsize >= sizeof(struct fs))
212 if (sblock_try[n] == -1) {
220 if (inomap != inode) {
222 if (dskread(blkbuf, INO_TO_VBA(fs, n, inode), DBPERVBLK))
224 n = INO_TO_VBO(n, inode);
225 #if defined(UFS1_ONLY)
226 dp1 = ((struct ufs1_dinode *)blkbuf)[n];
227 #elif defined(UFS2_ONLY)
228 dp2 = ((struct ufs2_dinode *)blkbuf)[n];
230 if (fs->fs_magic == FS_UFS1_MAGIC)
231 dp1 = ((struct ufs1_dinode *)blkbuf)[n];
233 dp2 = ((struct ufs2_dinode *)blkbuf)[n];
246 lbn = lblkno(fs, fs_off);
247 off = blkoff(fs, fs_off);
249 addr = DIP(di_db[lbn]);
250 } else if (lbn < NDADDR + NINDIR(fs)) {
251 n = INDIRPERVBLK(fs);
252 addr = DIP(di_ib[0]);
253 u = (u_int)(lbn - NDADDR) / n * DBPERVBLK;
254 vbaddr = fsbtodb(fs, addr) + u;
255 if (indmap != vbaddr) {
256 if (dskread(indbuf, vbaddr, DBPERVBLK))
260 n = (lbn - NDADDR) & (n - 1);
261 #if defined(UFS1_ONLY)
262 addr = ((ufs1_daddr_t *)indbuf)[n];
263 #elif defined(UFS2_ONLY)
264 addr = ((ufs2_daddr_t *)indbuf)[n];
266 if (fs->fs_magic == FS_UFS1_MAGIC)
267 addr = ((ufs1_daddr_t *)indbuf)[n];
269 addr = ((ufs2_daddr_t *)indbuf)[n];
274 vbaddr = fsbtodb(fs, addr) + (off >> VBLKSHIFT) * DBPERVBLK;
275 vboff = off & VBLKMASK;
276 n = sblksize(fs, size, lbn) - (off & ~VBLKMASK);
279 if (blkmap != vbaddr) {
280 if (dskread(blkbuf, vbaddr, n >> DEV_BSHIFT))
287 memcpy(s, blkbuf + vboff, n);