pass1.c revision 1820
1/* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static char sccsid[] = "@(#)pass1.c 8.1 (Berkeley) 6/5/93"; 36#endif /* not lint */ 37 38#include <sys/param.h> 39#include <sys/time.h> 40#include <ufs/ufs/dinode.h> 41#include <ufs/ufs/dir.h> 42#include <ufs/ffs/fs.h> 43#include <stdlib.h> 44#include <string.h> 45#include "fsck.h" 46 47static daddr_t badblk; 48static daddr_t dupblk; 49int pass1check(); 50struct dinode *getnextinode(); 51 52pass1() 53{ 54 ino_t inumber; 55 int c, i, cgd; 56 struct inodesc idesc; 57 58 /* 59 * Set file system reserved blocks in used block map. 60 */ 61 for (c = 0; c < sblock.fs_ncg; c++) { 62 cgd = cgdmin(&sblock, c); 63 if (c == 0) { 64 i = cgbase(&sblock, c); 65 cgd += howmany(sblock.fs_cssize, sblock.fs_fsize); 66 } else 67 i = cgsblock(&sblock, c); 68 for (; i < cgd; i++) 69 setbmap(i); 70 } 71 /* 72 * Find all allocated blocks. 73 */ 74 bzero((char *)&idesc, sizeof(struct inodesc)); 75 idesc.id_type = ADDR; 76 idesc.id_func = pass1check; 77 inumber = 0; 78 n_files = n_blks = 0; 79 resetinodebuf(); 80 for (c = 0; c < sblock.fs_ncg; c++) { 81 for (i = 0; i < sblock.fs_ipg; i++, inumber++) { 82 if (inumber < ROOTINO) 83 continue; 84 checkinode(inumber, &idesc); 85 } 86 } 87 freeinodebuf(); 88} 89 90checkinode(inumber, idesc) 91 ino_t inumber; 92 register struct inodesc *idesc; 93{ 94 register struct dinode *dp; 95 struct zlncnt *zlnp; 96 int ndb, j; 97 mode_t mode; 98 char symbuf[MAXSYMLINKLEN]; 99 100 dp = getnextinode(inumber); 101 mode = dp->di_mode & IFMT; 102 if (mode == 0) { 103 if (bcmp((char *)dp->di_db, (char *)zino.di_db, 104 NDADDR * sizeof(daddr_t)) || 105 bcmp((char *)dp->di_ib, (char *)zino.di_ib, 106 NIADDR * sizeof(daddr_t)) || 107 dp->di_mode || dp->di_size) { 108 pfatal("PARTIALLY ALLOCATED INODE I=%lu", inumber); 109 if (reply("CLEAR") == 1) { 110 dp = ginode(inumber); 111 clearinode(dp); 112 inodirty(); 113 } 114 } 115 statemap[inumber] = USTATE; 116 return; 117 } 118 lastino = inumber; 119 if (/* dp->di_size < 0 || */ 120 dp->di_size + sblock.fs_bsize - 1 < dp->di_size) { 121 if (debug) 122 printf("bad size %qu:", dp->di_size); 123 goto unknown; 124 } 125 if (!preen && mode == IFMT && reply("HOLD BAD BLOCK") == 1) { 126 dp = ginode(inumber); 127 dp->di_size = sblock.fs_fsize; 128 dp->di_mode = IFREG|0600; 129 inodirty(); 130 } 131 ndb = howmany(dp->di_size, sblock.fs_bsize); 132 if (ndb < 0) { 133 if (debug) 134 printf("bad size %qu ndb %d:", 135 dp->di_size, ndb); 136 goto unknown; 137 } 138 if (mode == IFBLK || mode == IFCHR) 139 ndb++; 140 if (mode == IFLNK) { 141 if (doinglevel2 && 142 dp->di_size > 0 && dp->di_size < MAXSYMLINKLEN && 143 dp->di_blocks != 0) { 144 if (bread(fsreadfd, symbuf, 145 fsbtodb(&sblock, dp->di_db[0]), 146 (long)dp->di_size) != 0) 147 errexit("cannot read symlink"); 148 if (debug) { 149 symbuf[dp->di_size] = 0; 150 printf("convert symlink %d(%s) of size %d\n", 151 inumber, symbuf, (long)dp->di_size); 152 } 153 dp = ginode(inumber); 154 bcopy(symbuf, (caddr_t)dp->di_shortlink, 155 (long)dp->di_size); 156 dp->di_blocks = 0; 157 inodirty(); 158 } 159 /* 160 * Fake ndb value so direct/indirect block checks below 161 * will detect any garbage after symlink string. 162 */ 163 if ((dp->di_size < sblock.fs_maxsymlinklen) || dp->di_blocks == 0) { 164 ndb = howmany(dp->di_size, sizeof(daddr_t)); 165 if (ndb > NDADDR) { 166 j = ndb - NDADDR; 167 for (ndb = 1; j > 1; j--) 168 ndb *= NINDIR(&sblock); 169 ndb += NDADDR; 170 } 171 } 172 } 173 for (j = ndb; j < NDADDR; j++) 174 if (dp->di_db[j] != 0) { 175 if (debug) 176 printf("bad direct addr: %ld\n", dp->di_db[j]); 177 goto unknown; 178 } 179 for (j = 0, ndb -= NDADDR; ndb > 0; j++) 180 ndb /= NINDIR(&sblock); 181 for (; j < NIADDR; j++) 182 if (dp->di_ib[j] != 0) { 183 if (debug) 184 printf("bad indirect addr: %ld\n", 185 dp->di_ib[j]); 186 goto unknown; 187 } 188 if (ftypeok(dp) == 0) 189 goto unknown; 190 n_files++; 191 lncntp[inumber] = dp->di_nlink; 192 if (dp->di_nlink <= 0) { 193 zlnp = (struct zlncnt *)malloc(sizeof *zlnp); 194 if (zlnp == NULL) { 195 pfatal("LINK COUNT TABLE OVERFLOW"); 196 if (reply("CONTINUE") == 0) 197 errexit(""); 198 } else { 199 zlnp->zlncnt = inumber; 200 zlnp->next = zlnhead; 201 zlnhead = zlnp; 202 } 203 } 204 if (mode == IFDIR) { 205 if (dp->di_size == 0) 206 statemap[inumber] = DCLEAR; 207 else 208 statemap[inumber] = DSTATE; 209 cacheino(dp, inumber); 210 } else 211 statemap[inumber] = FSTATE; 212 typemap[inumber] = IFTODT(mode); 213 if (doinglevel2 && 214 (dp->di_ouid != (u_short)-1 || dp->di_ogid != (u_short)-1)) { 215 dp = ginode(inumber); 216 dp->di_uid = dp->di_ouid; 217 dp->di_ouid = -1; 218 dp->di_gid = dp->di_ogid; 219 dp->di_ogid = -1; 220 inodirty(); 221 } 222 badblk = dupblk = 0; 223 idesc->id_number = inumber; 224 (void)ckinode(dp, idesc); 225 idesc->id_entryno *= btodb(sblock.fs_fsize); 226 if (dp->di_blocks != idesc->id_entryno) { 227 pwarn("INCORRECT BLOCK COUNT I=%lu (%ld should be %ld)", 228 inumber, dp->di_blocks, idesc->id_entryno); 229 if (preen) 230 printf(" (CORRECTED)\n"); 231 else if (reply("CORRECT") == 0) 232 return; 233 dp = ginode(inumber); 234 dp->di_blocks = idesc->id_entryno; 235 inodirty(); 236 } 237 return; 238unknown: 239 pfatal("UNKNOWN FILE TYPE I=%lu", inumber); 240 statemap[inumber] = FCLEAR; 241 if (reply("CLEAR") == 1) { 242 statemap[inumber] = USTATE; 243 dp = ginode(inumber); 244 clearinode(dp); 245 inodirty(); 246 } 247} 248 249pass1check(idesc) 250 register struct inodesc *idesc; 251{ 252 int res = KEEPON; 253 int anyout, nfrags; 254 daddr_t blkno = idesc->id_blkno; 255 register struct dups *dlp; 256 struct dups *new; 257 258 if ((anyout = chkrange(blkno, idesc->id_numfrags)) != 0) { 259 blkerror(idesc->id_number, "BAD", blkno); 260 if (badblk++ >= MAXBAD) { 261 pwarn("EXCESSIVE BAD BLKS I=%lu", 262 idesc->id_number); 263 if (preen) 264 printf(" (SKIPPING)\n"); 265 else if (reply("CONTINUE") == 0) 266 errexit(""); 267 return (STOP); 268 } 269 } 270 for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) { 271 if (anyout && chkrange(blkno, 1)) { 272 res = SKIP; 273 } else if (!testbmap(blkno)) { 274 n_blks++; 275 setbmap(blkno); 276 } else { 277 blkerror(idesc->id_number, "DUP", blkno); 278 if (dupblk++ >= MAXDUP) { 279 pwarn("EXCESSIVE DUP BLKS I=%lu", 280 idesc->id_number); 281 if (preen) 282 printf(" (SKIPPING)\n"); 283 else if (reply("CONTINUE") == 0) 284 errexit(""); 285 return (STOP); 286 } 287 new = (struct dups *)malloc(sizeof(struct dups)); 288 if (new == NULL) { 289 pfatal("DUP TABLE OVERFLOW."); 290 if (reply("CONTINUE") == 0) 291 errexit(""); 292 return (STOP); 293 } 294 new->dup = blkno; 295 if (muldup == 0) { 296 duplist = muldup = new; 297 new->next = 0; 298 } else { 299 new->next = muldup->next; 300 muldup->next = new; 301 } 302 for (dlp = duplist; dlp != muldup; dlp = dlp->next) 303 if (dlp->dup == blkno) 304 break; 305 if (dlp == muldup && dlp->dup != blkno) 306 muldup = new; 307 } 308 /* 309 * count the number of blocks found in id_entryno 310 */ 311 idesc->id_entryno++; 312 } 313 return (res); 314} 315