fsirand.c revision 1.15
1 /* $NetBSD: fsirand.c,v 1.15 2001/08/19 14:59:39 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 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. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __RCSID("$NetBSD: fsirand.c,v 1.15 2001/08/19 14:59:39 lukem Exp $"); 42 #endif /* lint */ 43 44 #include <ctype.h> 45 #include <err.h> 46 #include <errno.h> 47 #include <fcntl.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 #include <sys/types.h> 54 #include <sys/param.h> 55 #include <sys/time.h> 56 #include <sys/vnode.h> 57 #include <sys/disklabel.h> 58 #include <sys/ioctl.h> 59 60 #include <ufs/ufs/quota.h> 61 #include <ufs/ufs/inode.h> 62 #include <ufs/ufs/ufs_bswap.h> 63 64 #include <ufs/ffs/fs.h> 65 #include <ufs/ffs/ffs_extern.h> 66 67 static void usage(void); 68 static void getsblock(int, const char *, struct disklabel *, struct fs *); 69 static void fixinodes(int, struct fs *, struct disklabel *, int, long); 70 static void statussig(int); 71 72 int main(int, char *[]); 73 74 int needswap, ino, imax; 75 time_t tstart; 76 77 78 static void 79 usage(void) 80 { 81 82 (void) fprintf(stderr, 83 "Usage: %s [-F] [-p] [-x <constant>] <special>\n", 84 getprogname()); 85 exit(1); 86 } 87 88 89 /* 90 * getsblock(): 91 * Return the superblock 92 */ 93 static void 94 getsblock(int fd, const char *name, struct disklabel *lab, struct fs *fs) 95 { 96 struct partition *pp; 97 char p; 98 99 pp = NULL; 100 101 if (lab != NULL) { 102 p = name[strlen(name) - 1]; 103 if (p >= 'a' && p <= 'h') 104 pp = &lab->d_partitions[p - 'a']; 105 else if (isdigit((unsigned char) p)) 106 pp = &lab->d_partitions[0]; 107 else 108 errx(1, "Invalid partition `%c'", p); 109 110 if (pp->p_fstype != FS_BSDFFS) 111 errx(1, "Not an FFS partition"); 112 } 113 114 if (lseek(fd, (off_t) SBOFF , SEEK_SET) == (off_t) -1) 115 err(1, "Cannot seek to superblock"); 116 117 if (read(fd, fs, SBSIZE) != SBSIZE) 118 err(1, "Cannot read superblock"); 119 120 if (fs->fs_magic != FS_MAGIC) { 121 if(fs->fs_magic == bswap32(FS_MAGIC)) { 122 needswap = 1; 123 ffs_sb_swap(fs, fs); 124 } else 125 errx(1, "Bad superblock magic number"); 126 } 127 128 if (fs->fs_ncg < 1) 129 errx(1, "Bad ncg in superblock"); 130 131 if (fs->fs_cpg < 1) 132 errx(1, "Bad cpg in superblock"); 133 134 if (fs->fs_ncg * fs->fs_cpg < fs->fs_ncyl || 135 (fs->fs_ncg - 1) * fs->fs_cpg >= fs->fs_ncyl) 136 errx(1, "Bad number of cylinders in superblock"); 137 138 if (fs->fs_sbsize > SBSIZE) 139 errx(1, "Superblock too large"); 140 } 141 142 143 /* 144 * fixinodes(): 145 * Randomize the inode generation numbers 146 */ 147 static void 148 fixinodes(int fd, struct fs *fs, struct disklabel *lab, int pflag, long xorval) 149 { 150 int inopb = INOPB(fs); 151 int size = inopb * DINODE_SIZE; 152 caddr_t buf; 153 struct dinode *dip; 154 int i; 155 156 if ((buf = malloc(size)) == NULL) 157 err(1, "Out of memory"); 158 159 for (ino = 0, imax = fs->fs_ipg * fs->fs_ncg; ino < imax;) { 160 off_t sp; 161 sp = (off_t) fsbtodb(fs, ino_to_fsba(fs, ino)) * 162 (off_t) lab->d_secsize; 163 164 if (lseek(fd, sp, SEEK_SET) == (off_t) -1) 165 err(1, "Seeking to inode %d failed", ino); 166 167 if (read(fd, buf, size) != size) 168 err(1, "Reading inodes %d+%d failed", ino, inopb); 169 170 for (i = 0; i < inopb; i++) { 171 dip = (struct dinode *)(buf + (i * DINODE_SIZE)); 172 if (pflag) 173 printf("inode %10d gen 0x%08x\n", ino, 174 ufs_rw32(dip->di_gen, needswap)); 175 else 176 dip->di_gen = ufs_rw32(random() ^ xorval, 177 needswap); 178 if (++ino > imax) 179 errx(1, "Exceeded number of inodes"); 180 } 181 182 if (pflag) 183 continue; 184 185 if (lseek(fd, sp, SEEK_SET) == (off_t) -1) 186 err(1, "Seeking to inode %d failed", ino); 187 188 if (write(fd, buf, size) != size) 189 err(1, "Writing inodes %d+%d failed", ino, inopb); 190 } 191 free(buf); 192 } 193 194 /* 195 * statussig(): 196 * display current status 197 */ 198 void 199 statussig(int dummy) 200 { 201 char msgbuf[256]; 202 int len, deltat; 203 time_t tnow, elapsed; 204 205 (void)time(&tnow); 206 elapsed = tnow - tstart; 207 len = snprintf(msgbuf, sizeof(msgbuf), 208 "fsirand: completed inode %d of %d (%3.2f%%)", 209 ino, imax, (ino * 100.0) / imax); 210 if (imax - ino) { 211 deltat = tstart - tnow + (1.0 * (tnow - tstart)) / ino * imax; 212 len += snprintf(msgbuf + len, sizeof(msgbuf) - len, 213 ", finished in %d:%02d\n", deltat / 60, deltat % 60); 214 } else { 215 len += snprintf(msgbuf + len, sizeof(msgbuf) - len, "\n"); 216 } 217 write(STDERR_FILENO, msgbuf, len); 218 } 219 220 int 221 main(int argc, char *argv[]) 222 { 223 char buf[SBSIZE]; 224 struct fs *fs = (struct fs *) buf; 225 struct disklabel lab; 226 struct stat st; 227 int fd, c; 228 long xorval = 0; 229 char *ep; 230 struct timeval tv; 231 int Fflag, pflag; 232 233 Fflag = pflag = 0; 234 235 while ((c = getopt(argc, argv, "Fpx:")) != -1) 236 switch (c) { 237 case 'F': 238 Fflag++; 239 break; 240 case 'p': 241 pflag++; 242 break; 243 case 'x': 244 xorval = strtol(optarg, &ep, 0); 245 if ((xorval == LONG_MIN || xorval == LONG_MAX) && 246 errno == ERANGE) 247 err(1, "Out of range constant"); 248 if (*ep) 249 errx(1, "Bad constant"); 250 break; 251 default: 252 usage(); 253 } 254 255 argv += optind; 256 argc -= optind; 257 258 if (argc != 1) 259 usage(); 260 261 (void) gettimeofday(&tv, NULL); 262 srandom((unsigned) tv.tv_usec); 263 264 if ((fd = open(argv[0], pflag ? O_RDONLY : O_RDWR)) == -1) 265 err(1, "Cannot open `%s'", argv[0]); 266 if (fstat(fd, &st) == -1) 267 err(1, "Cannot stat `%s'", argv[0]); 268 269 if (Fflag) { 270 if (!S_ISREG(st.st_mode)) 271 errx(1, "%s: not a regular file", argv[0]); 272 memset(&lab, 0, sizeof(lab)); 273 lab.d_secsize = DEV_BSIZE; /* XXX */ 274 } else if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode)) { 275 if (ioctl(fd, DIOCGDINFO, &lab) == -1) 276 err(1, "%s: cannot get disklabel information", argv[0]); 277 } else 278 errx(1, "%s: not a block or character device", argv[0]); 279 280 time(&tstart); 281 (void)signal(SIGINFO, statussig); 282 getsblock(fd, argv[0], Fflag ? NULL : &lab, fs); 283 fixinodes(fd, fs, &lab, pflag, xorval); 284 285 (void) close(fd); 286 return 0; 287 } 288
Indexes created Tue Sep 30 10:09:55 GMT 2025