748 lines
20 KiB
C
748 lines
20 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1986, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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#define _WANT_P_OSREL
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/mount.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/uio.h>
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#include <sys/disklabel.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <err.h>
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#include <errno.h>
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#include <fstab.h>
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#include <grp.h>
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#include <inttypes.h>
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#include <libufs.h>
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#include <mntopts.h>
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#include <paths.h>
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#include <stdint.h>
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#include <string.h>
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#include <time.h>
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#include "fsck.h"
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static int restarts;
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static void usage(void) __dead2;
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static intmax_t argtoimax(int flag, const char *req, const char *str, int base);
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static int checkfilesys(char *filesys);
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static int setup_bkgrdchk(struct statfs *mntp, int sbrdfailed, char **filesys);
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int
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main(int argc, char *argv[])
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{
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int ch;
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struct rlimit rlimit;
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struct itimerval itimerval;
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int fsret;
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int ret = 0;
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sync();
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skipclean = 1;
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inoopt = 0;
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while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZz")) != -1) {
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switch (ch) {
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case 'b':
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skipclean = 0;
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bflag = argtoimax('b', "number", optarg, 10);
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printf("Alternate super block location: %jd\n", bflag);
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break;
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case 'B':
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bkgrdflag = 1;
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break;
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case 'c':
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skipclean = 0;
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cvtlevel = argtoimax('c', "conversion level", optarg,
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10);
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if (cvtlevel < 3)
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errx(EEXIT, "cannot do level %d conversion",
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cvtlevel);
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break;
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case 'd':
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debug++;
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break;
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case 'E':
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Eflag++;
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break;
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case 'f':
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skipclean = 0;
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break;
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case 'F':
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bkgrdcheck = 1;
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break;
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case 'm':
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lfmode = argtoimax('m', "mode", optarg, 8);
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if (lfmode &~ 07777)
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errx(EEXIT, "bad mode to -m: %o", lfmode);
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printf("** lost+found creation mode %o\n", lfmode);
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break;
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case 'n':
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nflag++;
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yflag = 0;
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break;
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case 'p':
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preen++;
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/*FALLTHROUGH*/
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case 'C':
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ckclean++;
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break;
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case 'R':
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wantrestart = 1;
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break;
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case 'r':
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inoopt++;
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break;
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case 'S':
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surrender = 1;
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break;
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case 'y':
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yflag++;
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nflag = 0;
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break;
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case 'Z':
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Zflag++;
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break;
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case 'z':
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zflag++;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (!argc)
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usage();
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if (bkgrdflag && cvtlevel > 0) {
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pfatal("CANNOT CONVERT A SNAPSHOT\n");
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exit(EEXIT);
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}
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if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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(void)signal(SIGINT, catch);
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if (ckclean)
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(void)signal(SIGQUIT, catchquit);
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signal(SIGINFO, infohandler);
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if (bkgrdflag) {
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signal(SIGALRM, alarmhandler);
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itimerval.it_interval.tv_sec = 5;
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itimerval.it_interval.tv_usec = 0;
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itimerval.it_value.tv_sec = 5;
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itimerval.it_value.tv_usec = 0;
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setitimer(ITIMER_REAL, &itimerval, NULL);
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}
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/*
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* Push up our allowed memory limit so we can cope
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* with huge file systems.
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*/
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if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
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rlimit.rlim_cur = rlimit.rlim_max;
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(void)setrlimit(RLIMIT_DATA, &rlimit);
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}
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while (argc > 0) {
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if ((fsret = checkfilesys(*argv)) == ERESTART)
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continue;
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ret |= fsret;
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argc--;
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argv++;
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}
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if (returntosingle)
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ret = 2;
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exit(ret);
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}
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static intmax_t
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argtoimax(int flag, const char *req, const char *str, int base)
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{
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char *cp;
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intmax_t ret;
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ret = strtoimax(str, &cp, base);
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if (cp == str || *cp)
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errx(EEXIT, "-%c flag requires a %s", flag, req);
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return (ret);
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}
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/*
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* Check the specified file system.
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*/
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/* ARGSUSED */
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static int
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checkfilesys(char *filesys)
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{
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ufs2_daddr_t n_ffree, n_bfree;
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struct dups *dp;
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struct statfs *mntp;
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intmax_t blks, files;
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size_t size;
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int sbreadfailed, ofsmodified;
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fsutilinit();
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fsckinit();
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cdevname = filesys;
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if (debug && ckclean)
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pwarn("starting\n");
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/*
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* Make best effort to get the disk name. Check first to see
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* if it is listed among the mounted file systems. Failing that
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* check to see if it is listed in /etc/fstab.
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*/
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mntp = getmntpoint(filesys);
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if (mntp != NULL)
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filesys = mntp->f_mntfromname;
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else
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filesys = blockcheck(filesys);
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/*
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* If -F flag specified, check to see whether a background check
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* is possible and needed. If possible and needed, exit with
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* status zero. Otherwise exit with status non-zero. A non-zero
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* exit status will cause a foreground check to be run.
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*/
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sblock_init();
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sbreadfailed = 0;
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if (openfilesys(filesys) == 0 || readsb() == 0)
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sbreadfailed = 1;
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if (bkgrdcheck) {
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if (sbreadfailed)
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exit(3); /* Cannot read superblock */
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if ((sblock.fs_flags & FS_NEEDSFSCK) == FS_NEEDSFSCK)
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exit(4); /* Earlier background failed */
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if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) {
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maxino = sblock.fs_ncg * sblock.fs_ipg;
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maxfsblock = sblock.fs_size;
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bufinit();
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preen = 1;
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if (suj_check(filesys) == 0)
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exit(4); /* Journal good, run it now */
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}
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if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
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exit(5); /* Not running soft updates */
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size = MIBSIZE;
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if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
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exit(6); /* Lacks kernel support */
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if ((mntp == NULL && sblock.fs_clean == 1) ||
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(mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
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exit(7); /* Filesystem clean, report it now */
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exit(0);
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}
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if (ckclean && skipclean) {
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/*
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* If file system is gjournaled, check it here.
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*/
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if (sbreadfailed)
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exit(3); /* Cannot read superblock */
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if (bkgrdflag == 0 &&
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(nflag || (fswritefd = open(filesys, O_WRONLY)) < 0)) {
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fswritefd = -1;
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if (preen)
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pfatal("NO WRITE ACCESS");
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printf(" (NO WRITE)");
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}
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if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
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if (sblock.fs_clean == 1) {
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pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
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exit(0);
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}
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if ((sblock.fs_flags &
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(FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
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bufinit();
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gjournal_check(filesys);
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if (chkdoreload(mntp, pwarn) == 0)
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exit(0);
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exit(4);
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} else {
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pfatal("FULL FSCK NEEDED, CANNOT RUN FAST "
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"FSCK\n");
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}
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}
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close(fswritefd);
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fswritefd = -1;
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}
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if (bkgrdflag) {
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switch (setup_bkgrdchk(mntp, sbreadfailed, &filesys)) {
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case -1: /* filesystem clean */
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goto clean;
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case 0: /* cannot do background, give up */
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exit(EEXIT);
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case 1: /* doing background check, preen rules apply */
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preen = 1;
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break;
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}
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}
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switch (setup(filesys)) {
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case 0:
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if (preen)
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pfatal("CAN'T CHECK FILE SYSTEM.");
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return (EEXIT);
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case -1:
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clean:
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pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
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sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
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printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n",
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(intmax_t)sblock.fs_cstotal.cs_nffree,
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(intmax_t)sblock.fs_cstotal.cs_nbfree,
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sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
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return (0);
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}
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/*
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* Determine if we can and should do journal recovery.
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*/
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if (bkgrdflag == 0 && (sblock.fs_flags & FS_SUJ) == FS_SUJ) {
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if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK &&
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skipclean) {
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sujrecovery = 1;
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if (suj_check(filesys) == 0) {
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pwarn("\n**** FILE SYSTEM MARKED CLEAN ****\n");
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if (chkdoreload(mntp, pwarn) == 0)
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exit(0);
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exit(4);
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}
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sujrecovery = 0;
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pwarn("Skipping journal, "
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"falling through to full fsck\n");
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}
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if (fswritefd != -1) {
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/*
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* Write the superblock so we don't try to recover the
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* journal on another pass. If this is the only change
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* to the filesystem, we do not want it to be called
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* out as modified.
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*/
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sblock.fs_mtime = time(NULL);
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sbdirty();
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ofsmodified = fsmodified;
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flush(fswritefd, &sblk);
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fsmodified = ofsmodified;
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}
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}
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/*
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* If the filesystem was run on an old kernel that did not
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* support check hashes, clear the check-hash flags so that
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* we do not try to verify them.
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*/
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if ((sblock.fs_flags & FS_METACKHASH) == 0)
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sblock.fs_metackhash = 0;
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/*
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* If we are running on a kernel that can provide check hashes
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* that are not yet enabled for the filesystem and we are
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* running manually without the -y flag, offer to add any
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* supported check hashes that are not already enabled.
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*/
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ckhashadd = 0;
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if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC &&
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fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) {
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if ((sblock.fs_metackhash & CK_CYLGRP) == 0 &&
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reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) {
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ckhashadd |= CK_CYLGRP;
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sblock.fs_metackhash |= CK_CYLGRP;
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}
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if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 &&
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getosreldate() >= P_OSREL_CK_SUPERBLOCK &&
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reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) {
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ckhashadd |= CK_SUPERBLOCK;
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sblock.fs_metackhash |= CK_SUPERBLOCK;
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}
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if ((sblock.fs_metackhash & CK_INODE) == 0 &&
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getosreldate() >= P_OSREL_CK_INODE &&
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reply("ADD INODE CHECK-HASH PROTECTION") != 0) {
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ckhashadd |= CK_INODE;
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sblock.fs_metackhash |= CK_INODE;
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}
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#ifdef notyet
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if ((sblock.fs_metackhash & CK_INDIR) == 0 &&
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getosreldate() >= P_OSREL_CK_INDIR &&
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reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) {
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ckhashadd |= CK_INDIR;
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sblock.fs_metackhash |= CK_INDIR;
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}
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if ((sblock.fs_metackhash & CK_DIR) == 0 &&
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getosreldate() >= P_OSREL_CK_DIR &&
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reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) {
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ckhashadd |= CK_DIR;
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sblock.fs_metackhash |= CK_DIR;
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}
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#endif /* notyet */
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if (ckhashadd != 0) {
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sblock.fs_flags |= FS_METACKHASH;
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sbdirty();
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}
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}
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/*
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* Cleared if any questions answered no. Used to decide if
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* the superblock should be marked clean.
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*/
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resolved = 1;
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/*
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* 1: scan inodes tallying blocks used
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*/
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if (preen == 0 || debug) {
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printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
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if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
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printf("** Root file system\n");
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printf("** Phase 1 - Check Blocks and Sizes\n");
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}
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clock_gettime(CLOCK_REALTIME_PRECISE, &startprog);
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pass1();
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IOstats("Pass1");
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/*
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* 1b: locate first references to duplicates, if any
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*/
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|
if (duplist) {
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if (preen || usedsoftdep)
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pfatal("INTERNAL ERROR: DUPS WITH %s%s%s",
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preen ? "-p" : "",
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(preen && usedsoftdep) ? " AND " : "",
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usedsoftdep ? "SOFTUPDATES" : "");
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|
if (preen == 0 || debug)
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|
printf("** Phase 1b - Rescan For More DUPS\n");
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pass1b();
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IOstats("Pass1b");
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|
}
|
|
|
|
/*
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|
* 2: traverse directories from root to mark all connected directories
|
|
*/
|
|
if (preen == 0 || debug)
|
|
printf("** Phase 2 - Check Pathnames\n");
|
|
pass2();
|
|
IOstats("Pass2");
|
|
|
|
/*
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|
* 3: scan inodes looking for disconnected directories
|
|
*/
|
|
if (preen == 0 || debug)
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|
printf("** Phase 3 - Check Connectivity\n");
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pass3();
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IOstats("Pass3");
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|
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/*
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* 4: scan inodes looking for disconnected files; check reference counts
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|
*/
|
|
if (preen == 0 || debug)
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|
printf("** Phase 4 - Check Reference Counts\n");
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|
pass4();
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|
IOstats("Pass4");
|
|
|
|
/*
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|
* 5: check and repair resource counts in cylinder groups
|
|
*/
|
|
if (preen == 0 || debug)
|
|
printf("** Phase 5 - Check Cyl groups\n");
|
|
snapflush(std_checkblkavail);
|
|
if (cgheader_corrupt) {
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|
printf("PHASE 5 SKIPPED DUE TO CORRUPT CYLINDER GROUP "
|
|
"HEADER(S)\n\n");
|
|
} else {
|
|
pass5();
|
|
IOstats("Pass5");
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|
}
|
|
|
|
/*
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|
* print out summary statistics
|
|
*/
|
|
n_ffree = sblock.fs_cstotal.cs_nffree;
|
|
n_bfree = sblock.fs_cstotal.cs_nbfree;
|
|
files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
|
|
blks = n_blks +
|
|
sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
|
|
blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
|
|
blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
|
|
blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
|
|
if (bkgrdflag && (files > 0 || blks > 0)) {
|
|
countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
|
|
pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n",
|
|
countdirs, files - countdirs, blks);
|
|
}
|
|
pwarn("%ld files, %jd used, %ju free ",
|
|
(long)n_files, (intmax_t)n_blks,
|
|
(uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
|
|
printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
|
|
(uintmax_t)n_ffree, (uintmax_t)n_bfree,
|
|
n_ffree * 100.0 / sblock.fs_dsize);
|
|
if (debug) {
|
|
if (files < 0)
|
|
printf("%jd inodes missing\n", -files);
|
|
if (blks < 0)
|
|
printf("%jd blocks missing\n", -blks);
|
|
if (duplist != NULL) {
|
|
printf("The following duplicate blocks remain:");
|
|
for (dp = duplist; dp; dp = dp->next)
|
|
printf(" %jd,", (intmax_t)dp->dup);
|
|
printf("\n");
|
|
}
|
|
}
|
|
duplist = (struct dups *)0;
|
|
muldup = (struct dups *)0;
|
|
inocleanup();
|
|
if (fsmodified) {
|
|
sblock.fs_time = time(NULL);
|
|
sbdirty();
|
|
}
|
|
if (cvtlevel && (sblk.b_flags & B_DIRTY) != 0) {
|
|
/*
|
|
* Write out the duplicate super blocks
|
|
*/
|
|
if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0)
|
|
fsmodified = 1;
|
|
}
|
|
if (rerun)
|
|
resolved = 0;
|
|
|
|
/*
|
|
* Check to see if the file system is mounted read-write.
|
|
*/
|
|
if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
|
|
resolved = 0;
|
|
ckfini(resolved);
|
|
|
|
if (fsmodified && !preen)
|
|
printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
|
|
if (rerun) {
|
|
if (wantrestart && (restarts++ < 10) &&
|
|
(preen || reply("RESTART")))
|
|
return (ERESTART);
|
|
printf("\n***** PLEASE RERUN FSCK *****\n");
|
|
}
|
|
if (chkdoreload(mntp, pwarn) != 0) {
|
|
if (!fsmodified)
|
|
return (0);
|
|
if (!preen)
|
|
printf("\n***** REBOOT NOW *****\n");
|
|
sync();
|
|
return (4);
|
|
}
|
|
return (rerun ? ERERUN : 0);
|
|
}
|
|
|
|
/*
|
|
* If we are to do a background check:
|
|
* Get the mount point information of the file system
|
|
* If already clean, return -1
|
|
* Check that kernel supports background fsck
|
|
* Find or create the snapshot directory
|
|
* Create the snapshot file
|
|
* Open snapshot
|
|
* If anything fails print reason and return 0 which exits
|
|
*/
|
|
static int
|
|
setup_bkgrdchk(struct statfs *mntp, int sbreadfailed, char **filesys)
|
|
{
|
|
struct stat snapdir;
|
|
struct group *grp;
|
|
struct iovec *iov;
|
|
char errmsg[255];
|
|
int iovlen;
|
|
size_t size;
|
|
|
|
/* Get the mount point information of the file system */
|
|
if (mntp == NULL) {
|
|
pwarn("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
|
|
return (0);
|
|
}
|
|
if ((mntp->f_flags & MNT_RDONLY) != 0) {
|
|
pwarn("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
|
|
return (0);
|
|
}
|
|
if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
|
|
pwarn("NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n");
|
|
return (0);
|
|
}
|
|
if (sbreadfailed) {
|
|
pwarn("SUPERBLOCK READ FAILED, CANNOT RUN IN BACKGROUND\n");
|
|
return (0);
|
|
}
|
|
if ((sblock.fs_flags & FS_NEEDSFSCK) != 0) {
|
|
pwarn("FULL FSCK NEEDED, CANNOT RUN IN BACKGROUND\n");
|
|
return (0);
|
|
}
|
|
if (skipclean && ckclean &&
|
|
(sblock.fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK)) == 0) {
|
|
/*
|
|
* file system is clean;
|
|
* skip snapshot and report it clean
|
|
*/
|
|
pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
|
|
return (-1);
|
|
}
|
|
/* Check that kernel supports background fsck */
|
|
size = MIBSIZE;
|
|
if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0||
|
|
sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0||
|
|
sysctlnametomib("vfs.ffs.setsize", setsize, &size) < 0 ||
|
|
sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0||
|
|
sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 ||
|
|
sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) {
|
|
pwarn("KERNEL LACKS BACKGROUND FSCK SUPPORT\n");
|
|
return (0);
|
|
}
|
|
/*
|
|
* When kernel lacks runtime bgfsck superblock summary
|
|
* adjustment functionality, it does not mean we can not
|
|
* continue, as old kernels will recompute the summary at
|
|
* mount time. However, it will be an unexpected softupdates
|
|
* inconsistency if it turns out that the summary is still
|
|
* incorrect. Set a flag so subsequent operation can know this.
|
|
*/
|
|
bkgrdsumadj = 1;
|
|
if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 ||
|
|
sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 ||
|
|
sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 ||
|
|
sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 ||
|
|
sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters,
|
|
&size) < 0) {
|
|
bkgrdsumadj = 0;
|
|
pwarn("KERNEL LACKS RUNTIME SUPERBLOCK SUMMARY ADJUSTMENT "
|
|
"SUPPORT\n");
|
|
}
|
|
/* Find or create the snapshot directory */
|
|
snprintf(snapname, sizeof snapname, "%s/.snap",
|
|
mntp->f_mntonname);
|
|
if (stat(snapname, &snapdir) < 0) {
|
|
if (errno != ENOENT) {
|
|
pwarn("CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT "
|
|
"RUN IN BACKGROUND\n", snapname, strerror(errno));
|
|
return (0);
|
|
}
|
|
if ((grp = getgrnam("operator")) == NULL ||
|
|
mkdir(snapname, 0770) < 0 ||
|
|
chown(snapname, -1, grp->gr_gid) < 0 ||
|
|
chmod(snapname, 0770) < 0) {
|
|
pwarn("CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, "
|
|
"CANNOT RUN IN BACKGROUND\n", snapname,
|
|
strerror(errno));
|
|
return (0);
|
|
}
|
|
} else if (!S_ISDIR(snapdir.st_mode)) {
|
|
pwarn("%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n",
|
|
snapname);
|
|
return (0);
|
|
}
|
|
/* Create the snapshot file */
|
|
iov = NULL;
|
|
iovlen = 0;
|
|
errmsg[0] = '\0';
|
|
snprintf(snapname, sizeof snapname, "%s/.snap/fsck_snapshot",
|
|
mntp->f_mntonname);
|
|
build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
|
|
build_iovec(&iov, &iovlen, "from", snapname, (size_t)-1);
|
|
build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, (size_t)-1);
|
|
build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
|
|
build_iovec(&iov, &iovlen, "update", NULL, 0);
|
|
build_iovec(&iov, &iovlen, "snapshot", NULL, 0);
|
|
/* Create snapshot, removing old snapshot if it exists */
|
|
while (nmount(iov, iovlen, mntp->f_flags) < 0) {
|
|
if (errno == EEXIST && unlink(snapname) == 0)
|
|
continue;
|
|
pwarn("CANNOT CREATE SNAPSHOT %s: %s %s\n", snapname,
|
|
strerror(errno), errmsg);
|
|
return (0);
|
|
}
|
|
/* Open snapshot */
|
|
if (openfilesys(snapname) == 0) {
|
|
unlink(snapname);
|
|
pwarn("CANNOT OPEN SNAPSHOT %s: %s, CANNOT RUN IN "
|
|
"BACKGROUND\n", snapname, strerror(errno));
|
|
return (0);
|
|
}
|
|
free(sblock.fs_csp);
|
|
free(sblock.fs_si);
|
|
if (readsb() == 0) {
|
|
pwarn("CANNOT READ SNAPSHOT SUPERBLOCK\n");
|
|
return (0);
|
|
}
|
|
*filesys = snapname;
|
|
cmd.version = FFS_CMD_VERSION;
|
|
cmd.handle = fsreadfd;
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void) fprintf(stderr,
|
|
"usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n",
|
|
getprogname());
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
infohandler(int sig __unused)
|
|
{
|
|
got_siginfo = 1;
|
|
}
|
|
|
|
void
|
|
alarmhandler(int sig __unused)
|
|
{
|
|
got_sigalarm = 1;
|
|
}
|