sbin/fsck/preen.c

   1 /*      $NetBSD: preen.c,v 1.32 2015/06/21 04:01:40 dholland Exp $      */
   2
   3 /*
   4  * Copyright (c) 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)preen.c     8.5 (Berkeley) 4/28/95";
  36 #else
  37 __RCSID("$NetBSD: preen.c,v 1.32 2015/06/21 04:01:40 dholland Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 /*
  42  * used by sbin/fsck
  43  * used by usr.sbin/quotacheck
  44  */
  45
  46 #include <sys/param.h>
  47 #include <sys/stat.h>
  48 #include <sys/wait.h>
  49 #include <sys/queue.h>
  50 #include <sys/disk.h>
  51 #include <sys/ioctl.h>
  52
  53 #include <err.h>
  54 #include <ctype.h>
  55 #include <fstab.h>
  56 #include <fcntl.h>
  57 #include <string.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <unistd.h>
  61 #include <util.h>
  62
  63 #include "fsutil.h"
  64 #include "exitvalues.h"
  65
  66 struct partentry {
  67         TAILQ_ENTRY(partentry)   p_entries;
  68         char                    *p_devname;     /* device name */
  69         char                    *p_mntpt;       /* mount point */
  70         char                    *p_type;        /* file system type */
  71         void                    *p_auxarg;      /* auxiliary argument */
  72 };
  73
  74 TAILQ_HEAD(part, partentry) badh;
  75
  76 struct diskentry {
  77         TAILQ_ENTRY(diskentry)      d_entries;
  78         char                       *d_name;     /* disk base name */
  79         TAILQ_HEAD(prt, partentry)  d_part;     /* list of partitions on disk */
  80         int                         d_pid;      /* 0 or pid of fsck proc */
  81 };
  82
  83 TAILQ_HEAD(diskinfo, diskentry) diskh;
  84
  85 static int nrun = 0, ndisks = 0;
  86
  87 static struct diskentry *finddisk(const char *);
  88 static void addpart(const char *, const char *, const char *, void *);
  89 static int startdisk(struct diskentry *,
  90     int (*)(const char *, const char *, const char *, void *, pid_t *));
  91 static void printpart(void);
  92
  93 int
  94 checkfstab(int flags, int maxrun, void *(*docheck)(struct fstab *),
  95     int (*checkit)(const char *, const char *, const char *, void *, pid_t *))
  96 {
  97         struct fstab *fs;
  98         struct diskentry *d, *nextdisk;
  99         struct partentry *p;
 100         int ret, pid, retcode, passno, sumstatus, status;
 101         void *auxarg;
 102         const char *name;
 103         int error = FSCK_EXIT_OK;
 104
 105         TAILQ_INIT(&badh);
 106         TAILQ_INIT(&diskh);
 107
 108         sumstatus = FSCK_EXIT_OK;
 109
 110         for (passno = 1; passno <= 2; passno++) {
 111                 if (setfsent() == 0) {
 112                         warnx("Can't open checklist file: %s", _PATH_FSTAB);
 113                         return FSCK_EXIT_CHECK_FAILED;
 114                 }
 115                 while ((fs = getfsent()) != 0) {
 116                         char buf[MAXPATHLEN];
 117                         const char *fsspec;
 118                         if ((auxarg = (*docheck)(fs)) == NULL)
 119                                 continue;
 120                         fsspec = getfsspecname(buf, sizeof(buf), fs->fs_spec);
 121                         if (fsspec == NULL) {
 122                                 warn("%s", buf);
 123                                 return FSCK_EXIT_CHECK_FAILED;
 124                         }
 125                         name = blockcheck(fsspec);
 126                         if (flags & CHECK_DEBUG)
 127                                 printf("pass %d, name %s\n", passno, name);
 128
 129                         if ((flags & CHECK_PREEN) == 0 ||
 130                             (passno == 1 && fs->fs_passno == 1)) {
 131                                 if (name == NULL) {
 132                                         if (flags & CHECK_PREEN)
 133                                                 return FSCK_EXIT_CHECK_FAILED;
 134                                         else
 135                                                 continue;
 136                                 }
 137                                 sumstatus = (*checkit)(fs->fs_vfstype,
 138                                     name, fs->fs_file, auxarg, NULL);
 139
 140                                 if (sumstatus) {
 141                                         if ((flags & CHECK_NOFIX) == 0)
 142                                                 return sumstatus;
 143                                         else if (error < sumstatus)
 144                                                 error = sumstatus;
 145                                 }
 146                         } else if (passno == 2 && fs->fs_passno > 1) {
 147                                 if (name == NULL) {
 148                                         (void) fprintf(stderr,
 149                                             "BAD DISK NAME %s\n", fsspec);
 150                                         sumstatus = FSCK_EXIT_CHECK_FAILED;
 151                                         continue;
 152                                 }
 153                                 addpart(fs->fs_vfstype, name, fs->fs_file,
 154                                     auxarg);
 155                         }
 156                 }
 157                 if ((flags & CHECK_PREEN) == 0)
 158                         return error;
 159         }
 160
 161         if (flags & CHECK_DEBUG)
 162                 printpart();
 163
 164         if (flags & CHECK_PREEN) {
 165                 if (maxrun == 0)
 166                         maxrun = ndisks;
 167                 if (maxrun > ndisks)
 168                         maxrun = ndisks;
 169                 nextdisk = TAILQ_FIRST(&diskh);
 170                 for (passno = 0; passno < maxrun; ++passno) {
 171                         if ((ret = startdisk(nextdisk, checkit)) != 0) {
 172                                 if ((flags & CHECK_NOFIX) == 0)
 173                                         return ret;
 174                                 else if (error < ret)
 175                                         error = ret;
 176                         }
 177                         nextdisk = TAILQ_NEXT(nextdisk, d_entries);
 178                 }
 179
 180                 while ((pid = wait(&status)) != -1) {
 181                         TAILQ_FOREACH(d, &diskh, d_entries)
 182                                 if (d->d_pid == pid)
 183                                         break;
 184
 185                         if (d == NULL) {
 186                                 warnx("Unknown pid %d", pid);
 187                                 continue;
 188                         }
 189
 190
 191                         if (WIFEXITED(status))
 192                                 retcode = WEXITSTATUS(status);
 193                         else
 194                                 retcode = 0;
 195
 196                         p = TAILQ_FIRST(&d->d_part);
 197
 198                         if (flags & (CHECK_DEBUG|CHECK_VERBOSE))
 199                                 (void) printf("done %s: %s (%s) = 0x%x\n",
 200                                     p->p_type, p->p_devname, p->p_mntpt,
 201                                     status);
 202
 203                         if (WIFSIGNALED(status)) {
 204                                 (void) fprintf(stderr,
 205                                     "%s: %s (%s): EXITED WITH SIGNAL %d\n",
 206                                     p->p_type, p->p_devname, p->p_mntpt,
 207                                     WTERMSIG(status));
 208                                 retcode = FSCK_EXIT_SIGNALLED;
 209                         }
 210
 211                         TAILQ_REMOVE(&d->d_part, p, p_entries);
 212
 213                         if (retcode != 0) {
 214                                 TAILQ_INSERT_TAIL(&badh, p, p_entries);
 215                                 sumstatus |= retcode;
 216                         } else {
 217                                 free(p->p_type);
 218                                 free(p->p_devname);
 219                                 free(p);
 220                         }
 221                         d->d_pid = 0;
 222                         nrun--;
 223
 224                         if (TAILQ_FIRST(&d->d_part) == NULL)
 225                                 ndisks--;
 226
 227                         if (nextdisk == NULL) {
 228                                 if (TAILQ_FIRST(&d->d_part) != NULL) {
 229                                         if ((ret = startdisk(d, checkit)) != 0)
 230                                         {
 231                                                 if ((flags & CHECK_NOFIX) == 0)
 232                                                         return ret;
 233                                                 else if (error < ret)
 234                                                         error = ret;
 235                                         }
 236                                 }
 237                         } else if (nrun < maxrun && nrun < ndisks) {
 238                                 for ( ;; ) {
 239                                         nextdisk = TAILQ_NEXT(nextdisk,
 240                                             d_entries);
 241                                         if (nextdisk == NULL)
 242                                                 nextdisk = TAILQ_FIRST(&diskh);
 243                                         if (TAILQ_FIRST(&nextdisk->d_part)
 244                                             != NULL && nextdisk->d_pid == 0)
 245                                                 break;
 246                                 }
 247                                 if ((ret = startdisk(nextdisk, checkit)) != 0)
 248                                 {
 249                                         if ((flags & CHECK_NOFIX) == 0)
 250                                                 return ret;
 251                                         else if (error < ret)
 252                                                 error = ret;
 253                                 }
 254                         }
 255                 }
 256         }
 257         if (sumstatus) {
 258                 p = TAILQ_FIRST(&badh);
 259                 if (p == NULL)
 260                         return sumstatus;
 261
 262                 (void) fprintf(stderr,
 263                         "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
 264                         TAILQ_NEXT(p, p_entries) ? "S" : "",
 265                         "UNEXPECTED INCONSISTENCY:");
 266
 267                 TAILQ_FOREACH(p, &badh, p_entries)
 268                         (void) fprintf(stderr,
 269                             "%s: %s (%s)%s", p->p_type, p->p_devname,
 270                             p->p_mntpt, TAILQ_NEXT(p, p_entries) ? ", " : "\n");
 271
 272                 return sumstatus;
 273         }
 274         (void) endfsent();
 275         return error;
 276 }
 277
 278
 279 static struct diskentry *
 280 finddisk(const char *name)
 281 {
 282         const char *p;
 283         size_t len, dlen;
 284         struct diskentry *d;
 285 #if !defined(__minix)
 286         char buf[MAXPATHLEN];
 287         struct dkwedge_info dkw;
 288         int fd;
 289
 290         if ((fd = opendisk(name, O_RDONLY, buf, sizeof(buf), 0)) != -1) {
 291                 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1)
 292                         name = dkw.dkw_parent;
 293                 (void)close(fd);
 294         }
 295 #endif /* !defined(__minix) */
 296
 297         for (dlen = len = strlen(name), p = name + len - 1; p >= name; --p)
 298                 if (isdigit((unsigned char)*p)) {
 299                         len = p - name + 1;
 300                         break;
 301                 }
 302         if (p < name)
 303                 len = dlen;
 304
 305         TAILQ_FOREACH(d, &diskh, d_entries)
 306                 if (strncmp(d->d_name, name, len) == 0 && d->d_name[len] == 0)
 307                         return d;
 308
 309         d = emalloc(sizeof(*d));
 310         d->d_name = estrdup(name);
 311         d->d_name[len] = '\0';
 312         TAILQ_INIT(&d->d_part);
 313         d->d_pid = 0;
 314
 315         TAILQ_INSERT_TAIL(&diskh, d, d_entries);
 316         ndisks++;
 317
 318         return d;
 319 }
 320
 321
 322 static void
 323 printpart(void)
 324 {
 325         struct diskentry *d;
 326         struct partentry *p;
 327
 328         TAILQ_FOREACH(d, &diskh, d_entries) {
 329                 (void) printf("disk %s:", d->d_name);
 330                 TAILQ_FOREACH(p, &d->d_part, p_entries)
 331                         (void) printf(" %s", p->p_devname);
 332                 (void) printf("\n");
 333         }
 334 }
 335
 336
 337 static void
 338 addpart(const char *type, const char *dev, const char *mntpt, void *auxarg)
 339 {
 340         struct diskentry *d = finddisk(dev);
 341         struct partentry *p;
 342
 343         TAILQ_FOREACH(p, &d->d_part, p_entries)
 344                 if (strcmp(p->p_devname, dev) == 0) {
 345                         warnx("%s in fstab more than once!", dev);
 346                         return;
 347                 }
 348
 349         p = emalloc(sizeof(*p));
 350         p->p_devname = estrdup(dev);
 351         p->p_mntpt = estrdup(mntpt);
 352         p->p_type = estrdup(type);
 353         p->p_auxarg = auxarg;
 354
 355         TAILQ_INSERT_TAIL(&d->d_part, p, p_entries);
 356 }
 357
 358
 359 static int
 360 startdisk(struct diskentry *d,
 361     int (*checkit)(const char *, const char *, const char *, void *, pid_t *))
 362 {
 363         struct partentry *p = TAILQ_FIRST(&d->d_part);
 364         int rv;
 365
 366         while ((rv = (*checkit)(p->p_type, p->p_devname, p->p_mntpt,
 367             p->p_auxarg, &d->d_pid)) != 0 && nrun > 0)
 368                 sleep(10);
 369
 370         if (rv == 0)
 371                 nrun++;
 372
 373         return rv;
 374 }