1 /* 2 * Copyright (c) 1990, 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 * @(#)preen.c 8.5 (Berkeley) 4/28/95 34 * $FreeBSD: src/sbin/fsck/preen.c,v 1.16 1999/12/30 16:32:40 peter Exp $ 35 * $DragonFly: src/sbin/fsck/preen.c,v 1.10 2006/10/19 21:22:13 pavalos Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/stat.h> 40 #include <sys/wait.h> 41 42 #include <vfs/ufs/dinode.h> 43 44 #include <ctype.h> 45 #include <errno.h> 46 #include <fstab.h> 47 #include <string.h> 48 49 #include "fsck.h" 50 51 struct part { 52 struct part *next; /* forward link of partitions on disk */ 53 char *name; /* device name */ 54 char *fsname; /* mounted filesystem name */ 55 long auxdata; /* auxillary data for application */ 56 } *badlist, **badnext = &badlist; 57 58 struct disk { 59 char *name; /* disk base name */ 60 struct disk *next; /* forward link for list of disks */ 61 struct part *part; /* head of list of partitions on disk */ 62 int pid; /* If != 0, pid of proc working on */ 63 } *disks; 64 65 int nrun, ndisks; 66 67 static void addpart(char *name, char *fsname, long auxdata); 68 static struct disk *finddisk(char *name); 69 static int startdisk(struct disk *dk, 70 int (*checkit)(char *, char *, long, int)); 71 72 int 73 checkfstab(int do_preen, int maxrun, int (*docheck)(struct fstab *), 74 int (*chkit)(char *, char *, long, int)) 75 { 76 struct fstab *fsp; 77 struct disk *dk, *nextdisk; 78 struct part *pt; 79 int ret, pid, retcode, passno, sumstatus, status; 80 long auxdata; 81 char *name; 82 83 sumstatus = 0; 84 for (passno = 1; passno <= 2; passno++) { 85 if (setfsent() == 0) { 86 fprintf(stderr, "Can't open checklist file: %s\n", 87 _PATH_FSTAB); 88 return (8); 89 } 90 while ((fsp = getfsent()) != 0) { 91 if ((auxdata = (*docheck)(fsp)) == 0) 92 continue; 93 if (do_preen == 0 || 94 (passno == 1 && fsp->fs_passno == 1)) { 95 if ((name = blockcheck(fsp->fs_spec)) != 0) { 96 if ((sumstatus = (*chkit)(name, 97 fsp->fs_file, auxdata, 0)) != 0) 98 return (sumstatus); 99 } else if (do_preen) 100 return (8); 101 } else if (passno == 2 && fsp->fs_passno > 1) { 102 if ((name = blockcheck(fsp->fs_spec)) == NULL) { 103 fprintf(stderr, "BAD DISK NAME %s\n", 104 fsp->fs_spec); 105 sumstatus |= 8; 106 continue; 107 } 108 addpart(name, fsp->fs_file, auxdata); 109 } 110 } 111 if (do_preen == 0) 112 return (0); 113 } 114 if (do_preen) { 115 if (maxrun == 0) 116 maxrun = ndisks; 117 if (maxrun > ndisks) 118 maxrun = ndisks; 119 nextdisk = disks; 120 for (passno = 0; passno < maxrun; ++passno) { 121 while ((ret = startdisk(nextdisk, chkit)) && nrun > 0) 122 sleep(10); 123 if (ret) 124 return (ret); 125 nextdisk = nextdisk->next; 126 } 127 while ((pid = wait(&status)) != -1) { 128 for (dk = disks; dk; dk = dk->next) 129 if (dk->pid == pid) 130 break; 131 if (dk == 0) { 132 printf("Unknown pid %d\n", pid); 133 continue; 134 } 135 if (WIFEXITED(status)) 136 retcode = WEXITSTATUS(status); 137 else 138 retcode = 0; 139 if (WIFSIGNALED(status)) { 140 printf("%s (%s): EXITED WITH SIGNAL %d\n", 141 dk->part->name, dk->part->fsname, 142 WTERMSIG(status)); 143 retcode = 8; 144 } 145 if (retcode != 0) { 146 sumstatus |= retcode; 147 *badnext = dk->part; 148 badnext = &dk->part->next; 149 dk->part = dk->part->next; 150 *badnext = NULL; 151 } else 152 dk->part = dk->part->next; 153 dk->pid = 0; 154 nrun--; 155 if (dk->part == NULL) 156 ndisks--; 157 158 if (nextdisk == NULL) { 159 if (dk->part) { 160 while ((ret = startdisk(dk, chkit)) && 161 nrun > 0) 162 sleep(10); 163 if (ret) 164 return (ret); 165 } 166 } else if (nrun < maxrun && nrun < ndisks) { 167 for ( ;; ) { 168 if ((nextdisk = nextdisk->next) == NULL) 169 nextdisk = disks; 170 if (nextdisk->part != NULL && 171 nextdisk->pid == 0) 172 break; 173 } 174 while ((ret = startdisk(nextdisk, chkit)) && 175 nrun > 0) 176 sleep(10); 177 if (ret) 178 return (ret); 179 } 180 } 181 } 182 if (sumstatus) { 183 if (badlist == 0) 184 return (sumstatus); 185 fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t", 186 badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:"); 187 for (pt = badlist; pt; pt = pt->next) 188 fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname, 189 pt->next ? ", " : "\n"); 190 return (sumstatus); 191 } 192 endfsent(); 193 return (0); 194 } 195 196 static struct disk * 197 finddisk(char *name) 198 { 199 struct disk *dk, **dkp; 200 char *p; 201 size_t len; 202 203 p = strrchr(name, '/'); 204 p = p == NULL ? name : p + 1; 205 while (*p != '\0' && !isdigit((u_char)*p)) 206 p++; 207 while (isdigit((u_char)*p)) 208 p++; 209 len = (size_t)(p - name); 210 for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) { 211 if (strncmp(dk->name, name, len) == 0 && 212 dk->name[len] == 0) 213 return (dk); 214 } 215 if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) { 216 fprintf(stderr, "out of memory"); 217 exit (8); 218 } 219 dk = *dkp; 220 if ((dk->name = malloc(len + 1)) == NULL) { 221 fprintf(stderr, "out of memory"); 222 exit (8); 223 } 224 strncpy(dk->name, name, len); 225 dk->name[len] = '\0'; 226 dk->part = NULL; 227 dk->next = NULL; 228 dk->pid = 0; 229 ndisks++; 230 return (dk); 231 } 232 233 static void 234 addpart(char *name, char *fsname, long auxdata) 235 { 236 struct disk *dk = finddisk(name); 237 struct part *pt, **ppt = &dk->part; 238 239 for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next) 240 if (strcmp(pt->name, name) == 0) { 241 printf("%s in fstab more than once!\n", name); 242 return; 243 } 244 if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) { 245 fprintf(stderr, "out of memory"); 246 exit (8); 247 } 248 pt = *ppt; 249 if ((pt->name = malloc(strlen(name) + 1)) == NULL) { 250 fprintf(stderr, "out of memory"); 251 exit (8); 252 } 253 strcpy(pt->name, name); 254 if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) { 255 fprintf(stderr, "out of memory"); 256 exit (8); 257 } 258 strcpy(pt->fsname, fsname); 259 pt->next = NULL; 260 pt->auxdata = auxdata; 261 } 262 263 static int 264 startdisk(struct disk *dk, int (*checkit)(char *, char *, long ,int)) 265 { 266 struct part *pt = dk->part; 267 268 dk->pid = fork(); 269 if (dk->pid < 0) { 270 perror("fork"); 271 return (8); 272 } 273 if (dk->pid == 0) 274 exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1)); 275 nrun++; 276 return (0); 277 } 278 279 char * 280 blockcheck(char *origname) 281 { 282 struct stat stblock; 283 char *newname; 284 struct fstab *fsinfo; 285 int retried = 0, len; 286 287 newname = origname; 288 retry: 289 if (stat(newname, &stblock) < 0) { 290 newname = getdevpath(newname, 0); 291 if (stat(newname, &stblock) < 0) { 292 printf("Can't stat %s: %s\n", newname, strerror(errno)); 293 return (origname); 294 } 295 } 296 switch(stblock.st_mode & S_IFMT) { 297 case S_IFCHR: 298 case S_IFBLK: 299 return(newname); 300 case S_IFREG: 301 return(newname); 302 case S_IFDIR: 303 if (retried) 304 break; 305 306 len = strlen(origname) - 1; 307 if (len > 0 && origname[len] == '/') 308 /* remove trailing slash */ 309 origname[len] = '\0'; 310 if ((fsinfo = getfsfile(origname)) == NULL) { 311 printf("Can't resolve %s to character special device", 312 origname); 313 return (0); 314 } 315 newname = fsinfo->fs_spec; 316 retried++; 317 goto retry; 318 } 319 /* 320 * Not a block or character device, just return name and 321 * let the user decide whether to use it. 322 */ 323 return (origname); 324 } 325