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NetBSD/sbin/newfs_ext2fs/newfs_ext2fs.c
christos 3e4993b396 fix unused variable warnings.
2013-10-19 01:09:58 +00:00

486 lines
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/* $NetBSD: newfs_ext2fs.c,v 1.9 2013/10/19 01:09:59 christos Exp $ */
/*
* Copyright (c) 1983, 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1993, 1994\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)newfs.c 8.13 (Berkeley) 5/1/95";
#else
__RCSID("$NetBSD: newfs_ext2fs.c,v 1.9 2013/10/19 01:09:59 christos Exp $");
#endif
#endif /* not lint */
/*
* newfs: friendly front end to mke2fs
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/file.h>
#include <sys/mount.h>
#include <ufs/ext2fs/ext2fs.h>
#include <ufs/ext2fs/ext2fs_dinode.h>
#include <disktab.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include <mntopts.h>
#include "extern.h"
#include "partutil.h"
static int64_t strsuftoi64(const char *, const char *, int64_t, int64_t, int *);
static void usage(void) __dead;
/*
* For file systems smaller than SMALL_FSSIZE we use the S_DFL_* defaults,
* otherwise if less than MEDIUM_FSSIZE use M_DFL_*, otherwise use
* L_DFL_*.
*/
#define SMALL_FSSIZE ((4 * 1024 * 1024) / sectorsize) /* 4MB */
#define S_DFL_BSIZE 1024
#define MEDIUM_FSSIZE ((512 * 1024 * 1024) / sectorsize) /* 512MB */
#define M_DFL_BSIZE 1024
#define L_DFL_BSIZE 4096
/*
* Each file system has a number of inodes statically allocated.
* We allocate one inode slot per 2, 4, or 8 blocks, expecting this
* to be far more than we will ever need.
*/
#define S_DFL_NINODE(blocks) ((blocks) / 8)
#define M_DFL_NINODE(blocks) ((blocks) / 4)
#define L_DFL_NINODE(blocks) ((blocks) / 2)
/*
* Default sector size.
*/
#define DFL_SECSIZE 512
int Nflag; /* run without writing file system */
int Oflag = 0; /* format as conservative REV0 by default */
int verbosity; /* amount of printf() output */
#define DEFAULT_VERBOSITY 3 /* 4 is traditional behavior of newfs(8) */
int64_t fssize; /* file system size */
uint sectorsize; /* bytes/sector */
uint16_t inodesize = EXT2_REV0_DINODE_SIZE; /* inode size */
uint fsize = 0; /* fragment size */
uint bsize = 0; /* block size */
uint minfree = MINFREE; /* free space threshold */
uint density; /* number of bytes per inode */
uint num_inodes; /* number of inodes (overrides density) */
char *volname = NULL; /* volume name */
static char *disktype = NULL;
static char device[MAXPATHLEN];
static const char lmsg[] = "%s: can't read disk label";
int
main(int argc, char *argv[])
{
struct disk_geom geo;
struct dkwedge_info dkw;
struct statvfs *mp;
struct stat sb;
int ch, fsi, fso, len, n, Fflag, Iflag, Zflag;
char *s1, *s2, *special;
const char *opstring;
int byte_sized;
uint blocks; /* number of blocks */
fsi = fso = -1;
Fflag = Iflag = Zflag = 0;
verbosity = -1;
opstring = "D:FINO:S:V:Zb:f:i:l:m:n:s:v:";
byte_sized = 0;
while ((ch = getopt(argc, argv, opstring)) != -1)
switch (ch) {
case 'D':
inodesize = (uint16_t)strtol(optarg, &s1, 0);
if (*s1 || (inodesize != 128 && inodesize != 256))
errx(1, "Bad inode size %d "
"(only 128 and 256 supported)", inodesize);
break;
case 'F':
Fflag = 1;
break;
case 'I':
Iflag = 1;
break;
case 'N':
Nflag = 1;
if (verbosity == -1)
verbosity = DEFAULT_VERBOSITY;
break;
case 'O':
Oflag = strsuftoi64("format", optarg, 0, 1, NULL);
break;
case 'S':
/*
* XXX:
* non-512 byte sectors almost certainly don't work.
*/
sectorsize = strsuftoi64("sector size",
optarg, 512, 65536, NULL);
if (!powerof2(sectorsize))
errx(EXIT_FAILURE,
"sector size `%s' is not a power of 2.",
optarg);
break;
case 'V':
verbosity = strsuftoi64("verbose", optarg, 0, 4, NULL);
break;
case 'Z':
Zflag = 1;
break;
case 'b':
bsize = strsuftoi64("block size",
optarg, MINBSIZE, EXT2_MAXBSIZE, NULL);
break;
case 'f':
fsize = strsuftoi64("fragment size",
optarg, MINBSIZE, EXT2_MAXBSIZE, NULL);
break;
case 'i':
density = strsuftoi64("bytes per inode",
optarg, 1, INT_MAX, NULL);
break;
case 'm':
minfree = strsuftoi64("free space %",
optarg, 0, 99, NULL);
break;
case 'n':
num_inodes = strsuftoi64("number of inodes",
optarg, 1, INT_MAX, NULL);
break;
case 's':
fssize = strsuftoi64("file system size",
optarg, INT64_MIN, INT64_MAX, &byte_sized);
break;
case 'v':
volname = optarg;
if (volname[0] == '\0')
errx(EXIT_FAILURE,
"Volume name cannot be zero length");
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (verbosity == -1)
/* Default to showing cg info */
verbosity = DEFAULT_VERBOSITY;
if (argc != 1)
usage();
memset(&sb, 0, sizeof(sb));
memset(&dkw, 0, sizeof(dkw));
special = argv[0];
if (Fflag) {
int fl;
/*
* It's a file system image
* no label, use fixed default for sectorsize.
*/
if (sectorsize == 0)
sectorsize = DFL_SECSIZE;
/* creating image in a regular file */
if (Nflag)
fl = O_RDONLY;
else {
if (fssize > 0)
fl = O_RDWR | O_CREAT;
else
fl = O_RDWR;
}
fsi = open(special, fl, 0777);
if (fsi == -1)
err(EXIT_FAILURE, "can't open file %s", special);
if (fstat(fsi, &sb) == -1)
err(EXIT_FAILURE, "can't fstat opened %s", special);
if (!Nflag)
fso = fsi;
} else { /* !Fflag */
fsi = opendisk(special, O_RDONLY, device, sizeof(device), 0);
special = device;
if (fsi < 0 || fstat(fsi, &sb) == -1)
err(EXIT_FAILURE, "%s: open for read", special);
if (!Nflag) {
fso = open(special, O_WRONLY, 0);
if (fso < 0)
err(EXIT_FAILURE,
"%s: open for write", special);
/* Bail if target special is mounted */
n = getmntinfo(&mp, MNT_NOWAIT);
if (n == 0)
err(EXIT_FAILURE, "%s: getmntinfo", special);
len = sizeof(_PATH_DEV) - 1;
s1 = special;
if (strncmp(_PATH_DEV, s1, len) == 0)
s1 += len;
while (--n >= 0) {
s2 = mp->f_mntfromname;
if (strncmp(_PATH_DEV, s2, len) == 0) {
s2 += len - 1;
*s2 = 'r';
}
if (strcmp(s1, s2) == 0 ||
strcmp(s1, &s2[1]) == 0)
errx(EXIT_FAILURE,
"%s is mounted on %s",
special, mp->f_mntonname);
++mp;
}
}
if (getdiskinfo(special, fsi, disktype, &geo, &dkw) == -1)
errx(EXIT_FAILURE, lmsg, special);
if (sectorsize == 0) {
sectorsize = geo.dg_secsize;
if (sectorsize <= 0)
errx(EXIT_FAILURE, "no default sector size");
}
if (dkw.dkw_parent[0]) {
if (dkw.dkw_size == 0)
errx(EXIT_FAILURE,
"%s partition is unavailable", special);
if (!Iflag) {
static const char m[] =
"%s partition type is not `%s' (or use -I)";
if (strcmp(dkw.dkw_ptype, DKW_PTYPE_EXT2FS))
errx(EXIT_FAILURE, m,
special, "Linux Ext2");
}
}
}
if (byte_sized)
fssize /= sectorsize;
if (fssize <= 0) {
if (sb.st_size != 0)
fssize += sb.st_size / sectorsize;
else
fssize += dkw.dkw_size;
if (fssize <= 0)
errx(EXIT_FAILURE,
"Unable to determine file system size");
}
if (dkw.dkw_parent[0] && fssize > dkw.dkw_size)
errx(EXIT_FAILURE,
"size %" PRIu64 " exceeds maximum file system size on "
"`%s' of %" PRIu64 " sectors",
fssize, special, dkw.dkw_size);
/* XXXLUKEM: only ftruncate() regular files ? (dsl: or at all?) */
if (Fflag && fso != -1
&& ftruncate(fso, (off_t)fssize * sectorsize) == -1)
err(1, "can't ftruncate %s to %" PRId64, special, fssize);
if (Zflag && fso != -1) { /* pre-zero (and de-sparce) the file */
char *buf;
int bufsize, i;
off_t bufrem;
struct statvfs sfs;
if (fstatvfs(fso, &sfs) == -1) {
warn("can't fstatvfs `%s'", special);
bufsize = 8192;
} else
bufsize = sfs.f_iosize;
if ((buf = calloc(1, bufsize)) == NULL)
err(1, "can't malloc buffer of %d",
bufsize);
bufrem = fssize * sectorsize;
if (verbosity > 0)
printf("Creating file system image in `%s', "
"size %" PRId64 " bytes, in %d byte chunks.\n",
special, bufrem, bufsize);
while (bufrem > 0) {
i = write(fso, buf, MIN(bufsize, bufrem));
if (i == -1)
err(1, "writing image");
bufrem -= i;
}
free(buf);
}
/* Sort out fragment and block sizes */
if (bsize == 0) {
bsize = fsize;
if (bsize == 0) {
if (fssize < SMALL_FSSIZE)
bsize = S_DFL_BSIZE;
else if (fssize < MEDIUM_FSSIZE)
bsize = M_DFL_BSIZE;
else
bsize = L_DFL_BSIZE;
}
}
if (fsize == 0)
fsize = bsize;
blocks = fssize * sectorsize / bsize;
if (num_inodes == 0) {
if (density != 0)
num_inodes = fssize / density;
else {
if (fssize < SMALL_FSSIZE)
num_inodes = S_DFL_NINODE(blocks);
else if (fssize < MEDIUM_FSSIZE)
num_inodes = M_DFL_NINODE(blocks);
else
num_inodes = L_DFL_NINODE(blocks);
}
}
mke2fs(special, fsi, fso);
if (fsi != -1)
close(fsi);
if (fso != -1 && fso != fsi)
close(fso);
exit(EXIT_SUCCESS);
}
static int64_t
strsuftoi64(const char *desc, const char *arg, int64_t min, int64_t max,
int *num_suffix)
{
int64_t result, r1;
int shift = 0;
char *ep;
errno = 0;
r1 = strtoll(arg, &ep, 10);
if (ep[0] != '\0' && ep[1] != '\0')
errx(EXIT_FAILURE,
"%s `%s' is not a valid number.", desc, arg);
switch (ep[0]) {
case '\0':
case 's':
case 'S':
if (num_suffix != NULL)
*num_suffix = 0;
break;
case 'g':
case 'G':
shift += 10;
/* FALLTHROUGH */
case 'm':
case 'M':
shift += 10;
/* FALLTHROUGH */
case 'k':
case 'K':
shift += 10;
/* FALLTHROUGH */
case 'b':
case 'B':
if (num_suffix != NULL)
*num_suffix = 1;
break;
default:
errx(EXIT_FAILURE,
"`%s' is not a valid suffix for %s.", ep, desc);
}
result = r1 << shift;
if (errno == ERANGE || result >> shift != r1)
errx(EXIT_FAILURE,
"%s `%s' is too large to convert.", desc, arg);
if (result < min)
errx(EXIT_FAILURE,
"%s `%s' (%" PRId64 ") is less than the minimum (%"
PRId64 ").", desc, arg, result, min);
if (result > max)
errx(EXIT_FAILURE,
"%s `%s' (%" PRId64 ") is greater than the maximum (%"
PRId64 ").", desc, arg, result, max);
return result;
}
static const char help_strings[] =
"\t-b bsize\tblock size\n"
"\t-D inodesize\tsize of an inode in bytes (128 or 256)\n"
"\t-F \t\tcreate file system image in regular file\n"
"\t-f fsize\tfragment size\n"
"\t-I \t\tdo not check that the file system type is `Linux Ext2'\n"
"\t-i density\tnumber of bytes per inode\n"
"\t-m minfree\tminimum free space %\n"
"\t-N \t\tdo not create file system, just print out parameters\n"
"\t-n inodes\tnumber of inodes (overrides -i density)\n"
"\t-O N\t\tfilesystem revision: 0 ==> REV0, 1 ==> REV1 (default 0)\n"
"\t-S secsize\tsector size\n"
"\t-s fssize\tfile system size (sectors)\n"
"\t-V verbose\toutput verbosity: 0 ==> none, 4 ==> max\n"
"\t-v volname\text2fs volume name\n"
"\t-Z \t\tpre-zero the image file\n";
static void
usage(void)
{
fprintf(stderr,
"usage: %s [ fsoptions ] special-device\n", getprogname());
fprintf(stderr, "where fsoptions are:\n");
fprintf(stderr, "%s", help_strings);
exit(EXIT_FAILURE);
}
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