276 lines
6.3 KiB
C
276 lines
6.3 KiB
C
/* $NetBSD: fssconfig.c,v 1.6 2008/04/28 20:24:16 martin Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Juergen Hannken-Illjes.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <util.h>
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#include <dev/fssvar.h>
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int vflag = 0;
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int xflag = 0;
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void config(int, char **);
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void unconfig(int, char **);
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void list(int, char **);
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void usage(void);
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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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void (*action)(int, char **);
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action = config;
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while ((ch = getopt(argc, argv, "cluvx")) != -1) {
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switch (ch) {
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case 'c':
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action = config;
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break;
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case 'l':
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action = list;
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break;
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case 'u':
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action = unconfig;
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break;
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case 'v':
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vflag++;
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break;
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case 'x':
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xflag++;
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break;
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default:
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case '?':
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usage();
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/* NOTREACHED */
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}
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}
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argc -= optind;
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argv += optind;
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(*action)(argc, argv);
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exit(0);
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}
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void
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config(int argc, char **argv)
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{
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int fd, isreg, istmp, ispersistent;
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char full[64], path[MAXPATHLEN];
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off_t bssize;
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dev_t mountdev;
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struct stat sbuf;
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struct statvfs fsbuf;
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struct fss_set fss;
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if (argc < 3)
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usage();
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istmp = ispersistent = 0;
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fss.fss_mount = argv[1];
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fss.fss_bstore = argv[2];
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if (statvfs(argv[1], &fsbuf) != 0 || stat(argv[1], &sbuf) != 0)
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err(1, "stat %s", argv[1]);
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mountdev = sbuf.st_dev;
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if (stat(argv[2], &sbuf) == 0 &&
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S_ISREG(sbuf.st_mode) &&
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sbuf.st_dev == mountdev) {
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if ((sbuf.st_flags & SF_SNAPSHOT) == 0)
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errx(1, "%s: exists and is not a snapshot", argv[2]);
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if (argc != 3)
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usage();
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isreg = ispersistent = 1;
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goto configure;
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}
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if (argc > 5)
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usage();
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if (argc > 3)
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fss.fss_csize = strsuftoll("cluster size", argv[3], 0, INT_MAX);
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else
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fss.fss_csize = 0;
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if (argc > 4)
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bssize = strsuftoll("bs size", argv[4], 0, LLONG_MAX);
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else
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bssize = (off_t)fsbuf.f_blocks*fsbuf.f_frsize;
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/*
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* Create the backing store. If it is a directory, create a temporary
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* file and set the unlink flag.
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*/
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if ((fd = open(fss.fss_bstore, O_CREAT|O_TRUNC|O_WRONLY, 0600)) < 0) {
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if (errno != EISDIR)
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err(1, "create: %s", fss.fss_bstore);
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snprintf(path, sizeof(path), "%s/XXXXXXXXXX", fss.fss_bstore);
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if ((fd = mkstemp(path)) < 0)
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err(1, "mkstemp: %s", path);
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fss.fss_bstore = path;
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istmp = 1;
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}
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if (fstat(fd, &sbuf) < 0)
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err(1, "stat: %s", fss.fss_bstore);
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if (!ispersistent && sbuf.st_dev == mountdev)
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ispersistent = 1;
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isreg = S_ISREG(sbuf.st_mode);
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if (!ispersistent && isreg && ftruncate(fd, bssize) < 0)
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err(1, "truncate %s", fss.fss_bstore);
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close(fd);
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configure:
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if ((fd = opendisk(argv[0], O_RDWR, full, sizeof(full), 0)) < 0) {
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if (istmp)
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unlink(fss.fss_bstore);
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err(1, "open: %s", argv[0]);
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}
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if (ioctl(fd, FSSIOCSET, &fss) < 0) {
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if (istmp)
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unlink(fss.fss_bstore);
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err(1, "%s: FSSIOCSET", full);
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}
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if ((xflag || istmp) && isreg && unlink(fss.fss_bstore) < 0)
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err(1, "unlink: %s", fss.fss_bstore);
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if (vflag)
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list(1, argv);
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}
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void
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unconfig(int argc, char **argv)
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{
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int fd;
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char full[64];
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if (argc != 1)
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usage();
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if (vflag)
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list(1, argv);
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if ((fd = opendisk(argv[0], O_RDWR, full, sizeof(full), 0)) < 0)
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err(1, "open: %s", argv[0]);
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if (ioctl(fd, FSSIOCCLR) < 0)
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err(1, "%s: FSSIOCCLR", full);
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}
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void
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list(int argc, char **argv)
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{
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int n, fd, flags;
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char *dev, path[64], full[64];
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char clbuf[5], bsbuf[5], tmbuf[64];
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time_t t;
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struct fss_get fsg;
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if (argc > 1)
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usage();
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if (argc > 0)
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dev = argv[0];
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else
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dev = path;
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for (n = 0; ; n++) {
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if (argc == 0)
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snprintf(path, sizeof(path), "fss%d", n);
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if ((fd = opendisk(dev, O_RDONLY, full, sizeof(full), 0)) < 0) {
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if (argc == 0 && (errno == ENOENT || errno == ENXIO))
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break;
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err(1, "open: %s", dev);
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}
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if (ioctl(fd, FSSIOFGET, &flags) < 0)
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flags = 0;
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if (ioctl(fd, FSSIOCGET, &fsg) < 0) {
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if (errno == ENXIO)
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printf("%s: not in use\n", dev);
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else
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err(1, "%s: FSSIOCGET", full);
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} else if (vflag) {
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humanize_number(clbuf, sizeof(clbuf),
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(int64_t)fsg.fsg_csize,
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"", HN_AUTOSCALE, HN_B|HN_NOSPACE);
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humanize_number(bsbuf, sizeof(bsbuf),
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(int64_t)fsg.fsg_bs_size*fsg.fsg_csize,
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"", HN_AUTOSCALE, HN_B|HN_NOSPACE);
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t = fsg.fsg_time.tv_sec;
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strftime(tmbuf, sizeof(tmbuf), "%F %T", localtime(&t));
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printf("%s: %s, taken %s", dev, fsg.fsg_mount, tmbuf);
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if ((flags & FSS_UNCONFIG_ON_CLOSE) != 0)
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printf(", unconfig on close");
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if (fsg.fsg_csize == 0)
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printf(", file system internal\n");
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else
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printf(", %"PRId64" cluster of %s, %s backup\n",
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fsg.fsg_mount_size, clbuf, bsbuf);
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} else
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printf("%s: %s\n", dev, fsg.fsg_mount);
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close(fd);
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if (argc > 0)
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break;
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}
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}
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void
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usage(void)
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{
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fprintf(stderr, "%s",
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"usage: fssconfig [-cxv] device path backup [cluster [size]]\n"
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" fssconfig -u [-v] device\n"
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" fssconfig -l [-v] [device]\n");
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exit(1);
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}
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