| 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[] = "@(#)pass2.c 5.4 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | #include <sys/param.h> |
| 12 | #include <sys/inode.h> |
| 13 | #include <sys/fs.h> |
| 14 | #include <sys/dir.h> |
| 15 | #include <strings.h> |
| 16 | #include "fsck.h" |
| 17 | |
| 18 | int pass2check(); |
| 19 | |
| 20 | pass2() |
| 21 | { |
| 22 | register DINODE *dp; |
| 23 | struct inodesc rootdesc; |
| 24 | |
| 25 | bzero((char *)&rootdesc, sizeof(struct inodesc)); |
| 26 | rootdesc.id_type = ADDR; |
| 27 | rootdesc.id_func = pass2check; |
| 28 | rootdesc.id_number = ROOTINO; |
| 29 | pathp = pathname; |
| 30 | switch (statemap[ROOTINO]) { |
| 31 | |
| 32 | case USTATE: |
| 33 | pfatal("ROOT INODE UNALLOCATED"); |
| 34 | if (reply("ALLOCATE") == 0) |
| 35 | errexit(""); |
| 36 | if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO) |
| 37 | errexit("CANNOT ALLOCATE ROOT INODE\n"); |
| 38 | descend(&rootdesc, ROOTINO); |
| 39 | break; |
| 40 | |
| 41 | case DCLEAR: |
| 42 | pfatal("DUPS/BAD IN ROOT INODE"); |
| 43 | if (reply("REALLOCATE")) { |
| 44 | freeino(ROOTINO); |
| 45 | if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO) |
| 46 | errexit("CANNOT ALLOCATE ROOT INODE\n"); |
| 47 | descend(&rootdesc, ROOTINO); |
| 48 | break; |
| 49 | } |
| 50 | if (reply("CONTINUE") == 0) |
| 51 | errexit(""); |
| 52 | statemap[ROOTINO] = DSTATE; |
| 53 | descend(&rootdesc, ROOTINO); |
| 54 | break; |
| 55 | |
| 56 | case FSTATE: |
| 57 | case FCLEAR: |
| 58 | pfatal("ROOT INODE NOT DIRECTORY"); |
| 59 | if (reply("REALLOCATE")) { |
| 60 | freeino(ROOTINO); |
| 61 | if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO) |
| 62 | errexit("CANNOT ALLOCATE ROOT INODE\n"); |
| 63 | descend(&rootdesc, ROOTINO); |
| 64 | break; |
| 65 | } |
| 66 | if (reply("FIX") == 0) |
| 67 | errexit(""); |
| 68 | dp = ginode(ROOTINO); |
| 69 | dp->di_mode &= ~IFMT; |
| 70 | dp->di_mode |= IFDIR; |
| 71 | inodirty(); |
| 72 | statemap[ROOTINO] = DSTATE; |
| 73 | /* fall into ... */ |
| 74 | |
| 75 | case DSTATE: |
| 76 | descend(&rootdesc, ROOTINO); |
| 77 | break; |
| 78 | |
| 79 | default: |
| 80 | errexit("BAD STATE %d FOR ROOT INODE", statemap[ROOTINO]); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | pass2check(idesc) |
| 85 | struct inodesc *idesc; |
| 86 | { |
| 87 | register DIRECT *dirp = idesc->id_dirp; |
| 88 | char *curpathloc; |
| 89 | int n, entrysize, ret = 0; |
| 90 | DINODE *dp; |
| 91 | DIRECT proto; |
| 92 | char namebuf[BUFSIZ]; |
| 93 | |
| 94 | /* |
| 95 | * check for "." |
| 96 | */ |
| 97 | if (idesc->id_entryno != 0) |
| 98 | goto chk1; |
| 99 | if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") == 0) { |
| 100 | if (dirp->d_ino != idesc->id_number) { |
| 101 | direrr(idesc->id_number, "BAD INODE NUMBER FOR '.'"); |
| 102 | dirp->d_ino = idesc->id_number; |
| 103 | if (reply("FIX") == 1) |
| 104 | ret |= ALTERED; |
| 105 | } |
| 106 | goto chk1; |
| 107 | } |
| 108 | direrr(idesc->id_number, "MISSING '.'"); |
| 109 | proto.d_ino = idesc->id_number; |
| 110 | proto.d_namlen = 1; |
| 111 | (void)strcpy(proto.d_name, "."); |
| 112 | entrysize = DIRSIZ(&proto); |
| 113 | if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") != 0) { |
| 114 | pfatal("CANNOT FIX, FIRST ENTRY IN DIRECTORY CONTAINS %s\n", |
| 115 | dirp->d_name); |
| 116 | } else if (dirp->d_reclen < entrysize) { |
| 117 | pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '.'\n"); |
| 118 | } else if (dirp->d_reclen < 2 * entrysize) { |
| 119 | proto.d_reclen = dirp->d_reclen; |
| 120 | bcopy((char *)&proto, (char *)dirp, entrysize); |
| 121 | if (reply("FIX") == 1) |
| 122 | ret |= ALTERED; |
| 123 | } else { |
| 124 | n = dirp->d_reclen - entrysize; |
| 125 | proto.d_reclen = entrysize; |
| 126 | bcopy((char *)&proto, (char *)dirp, entrysize); |
| 127 | idesc->id_entryno++; |
| 128 | lncntp[dirp->d_ino]--; |
| 129 | dirp = (DIRECT *)((char *)(dirp) + entrysize); |
| 130 | bzero((char *)dirp, n); |
| 131 | dirp->d_reclen = n; |
| 132 | if (reply("FIX") == 1) |
| 133 | ret |= ALTERED; |
| 134 | } |
| 135 | chk1: |
| 136 | if (idesc->id_entryno > 1) |
| 137 | goto chk2; |
| 138 | proto.d_ino = idesc->id_parent; |
| 139 | proto.d_namlen = 2; |
| 140 | (void)strcpy(proto.d_name, ".."); |
| 141 | entrysize = DIRSIZ(&proto); |
| 142 | if (idesc->id_entryno == 0) { |
| 143 | n = DIRSIZ(dirp); |
| 144 | if (dirp->d_reclen < n + entrysize) |
| 145 | goto chk2; |
| 146 | proto.d_reclen = dirp->d_reclen - n; |
| 147 | dirp->d_reclen = n; |
| 148 | idesc->id_entryno++; |
| 149 | lncntp[dirp->d_ino]--; |
| 150 | dirp = (DIRECT *)((char *)(dirp) + n); |
| 151 | bzero((char *)dirp, n); |
| 152 | dirp->d_reclen = n; |
| 153 | } |
| 154 | if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") == 0) { |
| 155 | if (dirp->d_ino != idesc->id_parent) { |
| 156 | direrr(idesc->id_number, "BAD INODE NUMBER FOR '..'"); |
| 157 | dirp->d_ino = idesc->id_parent; |
| 158 | if (reply("FIX") == 1) |
| 159 | ret |= ALTERED; |
| 160 | } |
| 161 | goto chk2; |
| 162 | } |
| 163 | direrr(idesc->id_number, "MISSING '..'"); |
| 164 | if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") != 0) { |
| 165 | pfatal("CANNOT FIX, SECOND ENTRY IN DIRECTORY CONTAINS %s\n", |
| 166 | dirp->d_name); |
| 167 | } else if (dirp->d_reclen < entrysize) { |
| 168 | pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '..'\n"); |
| 169 | } else { |
| 170 | proto.d_reclen = dirp->d_reclen; |
| 171 | bcopy((char *)&proto, (char *)dirp, entrysize); |
| 172 | if (reply("FIX") == 1) |
| 173 | ret |= ALTERED; |
| 174 | } |
| 175 | chk2: |
| 176 | if (dirp->d_ino == 0) |
| 177 | return (ret|KEEPON); |
| 178 | if (dirp->d_namlen <= 2 && |
| 179 | dirp->d_name[0] == '.' && |
| 180 | idesc->id_entryno >= 2) { |
| 181 | if (dirp->d_namlen == 1) { |
| 182 | direrr(idesc->id_number, "EXTRA '.' ENTRY"); |
| 183 | dirp->d_ino = 0; |
| 184 | if (reply("FIX") == 1) |
| 185 | ret |= ALTERED; |
| 186 | return (KEEPON | ret); |
| 187 | } |
| 188 | if (dirp->d_name[1] == '.') { |
| 189 | direrr(idesc->id_number, "EXTRA '..' ENTRY"); |
| 190 | dirp->d_ino = 0; |
| 191 | if (reply("FIX") == 1) |
| 192 | ret |= ALTERED; |
| 193 | return (KEEPON | ret); |
| 194 | } |
| 195 | } |
| 196 | curpathloc = pathp; |
| 197 | *pathp++ = '/'; |
| 198 | if (pathp + dirp->d_namlen >= endpathname) { |
| 199 | *pathp = '\0'; |
| 200 | errexit("NAME TOO LONG %s%s\n", pathname, dirp->d_name); |
| 201 | } |
| 202 | bcopy(dirp->d_name, pathp, dirp->d_namlen + 1); |
| 203 | pathp += dirp->d_namlen; |
| 204 | idesc->id_entryno++; |
| 205 | n = 0; |
| 206 | if (dirp->d_ino > imax || dirp->d_ino <= 0) { |
| 207 | direrr(dirp->d_ino, "I OUT OF RANGE"); |
| 208 | n = reply("REMOVE"); |
| 209 | } else { |
| 210 | again: |
| 211 | switch (statemap[dirp->d_ino]) { |
| 212 | case USTATE: |
| 213 | direrr(dirp->d_ino, "UNALLOCATED"); |
| 214 | n = reply("REMOVE"); |
| 215 | break; |
| 216 | |
| 217 | case DCLEAR: |
| 218 | case FCLEAR: |
| 219 | direrr(dirp->d_ino, "DUP/BAD"); |
| 220 | if ((n = reply("REMOVE")) == 1) |
| 221 | break; |
| 222 | dp = ginode(dirp->d_ino); |
| 223 | statemap[dirp->d_ino] = DIRCT(dp) ? DSTATE : FSTATE; |
| 224 | lncntp[dirp->d_ino] = dp->di_nlink; |
| 225 | goto again; |
| 226 | |
| 227 | case DFOUND: |
| 228 | if (idesc->id_entryno > 2) { |
| 229 | getpathname(namebuf, dirp->d_ino, dirp->d_ino); |
| 230 | pwarn("%s %s %s\n", pathname, |
| 231 | "IS AN EXTRANEOUS HARD LINK TO DIRECTORY", |
| 232 | namebuf); |
| 233 | if (preen) |
| 234 | printf(" (IGNORED)\n"); |
| 235 | else if ((n = reply("REMOVE")) == 1) |
| 236 | break; |
| 237 | } |
| 238 | /* fall through */ |
| 239 | |
| 240 | case FSTATE: |
| 241 | lncntp[dirp->d_ino]--; |
| 242 | break; |
| 243 | |
| 244 | case DSTATE: |
| 245 | descend(idesc, dirp->d_ino); |
| 246 | if (statemap[dirp->d_ino] == DFOUND) { |
| 247 | lncntp[dirp->d_ino]--; |
| 248 | } else if (statemap[dirp->d_ino] == DCLEAR) { |
| 249 | dirp->d_ino = 0; |
| 250 | ret |= ALTERED; |
| 251 | } else |
| 252 | errexit("BAD RETURN STATE %d FROM DESCEND", |
| 253 | statemap[dirp->d_ino]); |
| 254 | break; |
| 255 | |
| 256 | default: |
| 257 | errexit("BAD STATE %d FOR INODE I=%d", |
| 258 | statemap[dirp->d_ino], dirp->d_ino); |
| 259 | } |
| 260 | } |
| 261 | pathp = curpathloc; |
| 262 | *pathp = '\0'; |
| 263 | if (n == 0) |
| 264 | return (ret|KEEPON); |
| 265 | dirp->d_ino = 0; |
| 266 | return (ret|KEEPON|ALTERED); |
| 267 | } |