4.3BSD - /usr/src/etc/fsck/pass1.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)pass1.c	5.3 (Berkeley) 5/13/86";
   9: #endif not lint
  10: 
  11: #include <sys/param.h>
  12: #include <sys/inode.h>
  13: #include <sys/fs.h>
  14: #include "fsck.h"
  15: 
  16: static daddr_t badblk;
  17: static daddr_t dupblk;
  18: int pass1check();
  19: 
  20: pass1()
  21: {
  22:     register int c, i, j;
  23:     register DINODE *dp;
  24:     struct zlncnt *zlnp;
  25:     int ndb, partial, cgd;
  26:     struct inodesc idesc;
  27:     ino_t inumber;
  28: 
  29:     /*
  30: 	 * Set file system reserved blocks in used block map.
  31: 	 */
  32:     for (c = 0; c < sblock.fs_ncg; c++) {
  33:         cgd = cgdmin(&sblock, c);
  34:         if (c == 0) {
  35:             i = cgbase(&sblock, c);
  36:             cgd += howmany(sblock.fs_cssize, sblock.fs_fsize);
  37:         } else
  38:             i = cgsblock(&sblock, c);
  39:         for (; i < cgd; i++)
  40:             setbmap(i);
  41:     }
  42:     /*
  43: 	 * Find all allocated blocks.
  44: 	 */
  45:     bzero((char *)&idesc, sizeof(struct inodesc));
  46:     idesc.id_type = ADDR;
  47:     idesc.id_func = pass1check;
  48:     inumber = 0;
  49:     n_files = n_blks = 0;
  50:     for (c = 0; c < sblock.fs_ncg; c++) {
  51:         for (i = 0; i < sblock.fs_ipg; i++, inumber++) {
  52:             if (inumber < ROOTINO)
  53:                 continue;
  54:             dp = ginode(inumber);
  55:             if (!ALLOC(dp)) {
  56:                 if (bcmp((char *)dp->di_db, (char *)zino.di_db,
  57:                     NDADDR * sizeof(daddr_t)) ||
  58:                     bcmp((char *)dp->di_ib, (char *)zino.di_ib,
  59:                     NIADDR * sizeof(daddr_t)) ||
  60:                     dp->di_mode || dp->di_size) {
  61:                     pfatal("PARTIALLY ALLOCATED INODE I=%u",
  62:                         inumber);
  63:                     if (reply("CLEAR") == 1) {
  64:                         zapino(dp);
  65:                         inodirty();
  66:                     }
  67:                 }
  68:                 statemap[inumber] = USTATE;
  69:                 continue;
  70:             }
  71:             lastino = inumber;
  72:             if (dp->di_size < 0) {
  73:                 if (debug)
  74:                     printf("bad size %d:", dp->di_size);
  75:                 goto unknown;
  76:             }
  77:             if (!preen && (dp->di_mode & IFMT) == IFMT &&
  78:                 reply("HOLD BAD BLOCK") == 1) {
  79:                 dp->di_size = sblock.fs_fsize;
  80:                 dp->di_mode = IFREG|0600;
  81:                 inodirty();
  82:             }
  83:             ndb = howmany(dp->di_size, sblock.fs_bsize);
  84:             if (SPECIAL(dp))
  85:                 ndb++;
  86:             for (j = ndb; j < NDADDR; j++)
  87:                 if (dp->di_db[j] != 0) {
  88:                     if (debug)
  89:                         printf("bad direct addr: %d\n",
  90:                             dp->di_db[j]);
  91:                     goto unknown;
  92:                 }
  93:             for (j = 0, ndb -= NDADDR; ndb > 0; j++)
  94:                 ndb /= NINDIR(&sblock);
  95:             for (; j < NIADDR; j++)
  96:                 if (dp->di_ib[j] != 0) {
  97:                     if (debug)
  98:                         printf("bad indirect addr: %d\n",
  99:                             dp->di_ib[j]);
 100:                     goto unknown;
 101:                 }
 102:             if (ftypeok(dp) == 0)
 103:                 goto unknown;
 104:             n_files++;
 105:             lncntp[inumber] = dp->di_nlink;
 106:             if (dp->di_nlink <= 0) {
 107:                 zlnp = (struct zlncnt *)malloc(sizeof *zlnp);
 108:                 if (zlnp == NULL) {
 109:                     pfatal("LINK COUNT TABLE OVERFLOW");
 110:                     if (reply("CONTINUE") == 0)
 111:                         errexit("");
 112:                 } else {
 113:                     zlnp->zlncnt = inumber;
 114:                     zlnp->next = zlnhead;
 115:                     zlnhead = zlnp;
 116:                 }
 117:             }
 118:             statemap[inumber] = DIRCT(dp) ? DSTATE : FSTATE;
 119:             badblk = dupblk = 0; maxblk = 0;
 120:             idesc.id_number = inumber;
 121:             (void)ckinode(dp, &idesc);
 122:             idesc.id_entryno *= btodb(sblock.fs_fsize);
 123:             if (dp->di_blocks != idesc.id_entryno) {
 124:                 pwarn("INCORRECT BLOCK COUNT I=%u (%ld should be %ld)",
 125:                     inumber, dp->di_blocks, idesc.id_entryno);
 126:                 if (preen)
 127:                     printf(" (CORRECTED)\n");
 128:                 else if (reply("CORRECT") == 0)
 129:                     continue;
 130:                 dp->di_blocks = idesc.id_entryno;
 131:                 inodirty();
 132:             }
 133:             continue;
 134:     unknown:
 135:             pfatal("UNKNOWN FILE TYPE I=%u", inumber);
 136:             statemap[inumber] = FCLEAR;
 137:             if (reply("CLEAR") == 1) {
 138:                 statemap[inumber] = USTATE;
 139:                 zapino(dp);
 140:                 inodirty();
 141:             }
 142:         }
 143:     }
 144: }
 145: 
 146: pass1check(idesc)
 147:     register struct inodesc *idesc;
 148: {
 149:     int res = KEEPON;
 150:     int anyout, nfrags;
 151:     daddr_t blkno = idesc->id_blkno;
 152:     register struct dups *dlp;
 153:     struct dups *new;
 154: 
 155:     if ((anyout = outrange(blkno, idesc->id_numfrags)) != 0) {
 156:         blkerr(idesc->id_number, "BAD", blkno);
 157:         if (++badblk >= MAXBAD) {
 158:             pwarn("EXCESSIVE BAD BLKS I=%u",
 159:                 idesc->id_number);
 160:             if (preen)
 161:                 printf(" (SKIPPING)\n");
 162:             else if (reply("CONTINUE") == 0)
 163:                 errexit("");
 164:             return (STOP);
 165:         }
 166:     }
 167:     for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
 168:         if (anyout && outrange(blkno, 1)) {
 169:             res = SKIP;
 170:         } else if (!getbmap(blkno)) {
 171:             n_blks++;
 172:             setbmap(blkno);
 173:         } else {
 174:             blkerr(idesc->id_number, "DUP", blkno);
 175:             if (++dupblk >= MAXDUP) {
 176:                 pwarn("EXCESSIVE DUP BLKS I=%u",
 177:                     idesc->id_number);
 178:                 if (preen)
 179:                     printf(" (SKIPPING)\n");
 180:                 else if (reply("CONTINUE") == 0)
 181:                     errexit("");
 182:                 return (STOP);
 183:             }
 184:             new = (struct dups *)malloc(sizeof(struct dups));
 185:             if (new == NULL) {
 186:                 pfatal("DUP TABLE OVERFLOW.");
 187:                 if (reply("CONTINUE") == 0)
 188:                     errexit("");
 189:                 return (STOP);
 190:             }
 191:             new->dup = blkno;
 192:             if (muldup == 0) {
 193:                 duplist = muldup = new;
 194:                 new->next = 0;
 195:             } else {
 196:                 new->next = muldup->next;
 197:                 muldup->next = new;
 198:             }
 199:             for (dlp = duplist; dlp != muldup; dlp = dlp->next)
 200:                 if (dlp->dup == blkno)
 201:                     break;
 202:             if (dlp == muldup && dlp->dup != blkno)
 203:                 muldup = new;
 204:         }
 205:         /*
 206: 		 * count the number of blocks found in id_entryno
 207: 		 */
 208:         idesc->id_entryno++;
 209:     }
 210:     return (res);
 211: }

Defined functions

Defined variables