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Add the ability to detect ZFS and GELI encrypted file systems to fstyp(8)

Browse Source 
Functionality is hidden behind the -u flag to avoid confusing automounters

PR:		200823
Reviewed by:	asomers, eadler, wblock (man page)
Approved by:	trasz
MFC after:	10 days
Relnotes:	yes
Sponsored by:	ScaleEngine Inc.
Differential Revision:	https://reviews.freebsd.org/D2045
This commit is contained in:
Allan Jude 2015-06-19 05:09:02 +00:00
parent 3233d0c654
commit 398e498e49
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=284589
6 changed files with 244 additions and 19 deletions
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34
usr.sbin/fstyp/Makefile
View File

@ -1,9 +1,41 @@
# $FreeBSD$
.include <src.opts.mk>
PROG= fstyp
SRCS= fstyp.c ext2fs.c cd9660.c msdosfs.c ntfs.c ufs.c
SRCS= cd9660.c ext2fs.c fstyp.c geli.c msdosfs.c ntfs.c ufs.c
.if ${MK_CDDL} != "no"
SRCS += zfs.c
.endif
MAN= fstyp.8
WARNS= 6
.if ${MK_CDDL} != "no"
IGNORE_PRAGMA= YES
CFLAGS+= -DNEED_SOLARIS_BOOLEAN -DHAVE_CDDL
CFLAGS+= -I${.CURDIR}/../../sys/cddl/compat/opensolaris
CFLAGS+= -I${.CURDIR}/../../cddl/compat/opensolaris/include
CFLAGS+= -I${.CURDIR}/../../cddl/compat/opensolaris/lib/libumem
CFLAGS+= -I${.CURDIR}/../../cddl/contrib/opensolaris/lib/libnvpair
CFLAGS+= -I${.CURDIR}/../../cddl/contrib/opensolaris/lib/libzpool/common
CFLAGS+= -I${.CURDIR}/../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
CFLAGS+= -I${.CURDIR}/../../sys/cddl/contrib/opensolaris/uts/common
CFLAGS+= -I${.CURDIR}/../../sys/cddl/contrib/opensolaris/uts/common/sys
CFLAGS+= -I${.CURDIR}/../../cddl/contrib/opensolaris/head
.endif
CFLAGS+=-I${.CURDIR}/../../sys
DPADD= ${LIBGEOM} ${LIBMD}
LDADD= -lgeom -lmd
.if ${MK_CDDL} != "no"
DPADD += ${LIBNVPAIR} ${LIBZFS}
LDADD += -lnvpair -lzfs
.endif
.include <bsd.prog.mk>

48
usr.sbin/fstyp/fstyp.8
View File

@ -27,7 +27,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd January 14, 2015
.Dd June 15, 2015
.Dt FSTYP 8
.Os
.Sh NAME
@ -37,20 +37,42 @@
.Nm
.Op Fl l
.Op Fl s
.Op Fl u
.Ar special
.Sh DESCRIPTION
The
.Nm
utility is used to determine the filesystem type on a given device.
It can recognize ISO-9660, Ext2, FAT, NTFS, and UFS filesystems.
When the
.Fl u
flag is specified,
.Nm
also recognizes certain additional metadata formats that cannot be
handled using
.Xr mount 8 ,
such as ZFS pools and
.Xr geli 8
providers.
.Pp
The filesystem name is printed to the standard output
as, respectively,
.Li cd9660 ,
.Li ext2fs ,
.Li msdosfs ,
.Li ntfs ,
or
.Li ufs .
as, respectively:
.Bl -item -offset indent -compact
.It
cd9660
.It
ext2fs
.It
geli
.It
msdosfs
.It
ntfs
.It
ufs
.It
zfs
.El
.Pp
Because
.Nm
@ -73,6 +95,9 @@ By default,
only works on regular files and disk-like device nodes.
Trying to read other file types might have unexpected consequences or hang
indefinitely.
.It Fl u
Include filesystems and devices that cannot be mounted directly by
.Xr mount 8 .
.El
.Sh EXIT STATUS
The
@ -82,8 +107,11 @@ type is not recognized.
.Sh SEE ALSO
.Xr file 1 ,
.Xr capsicum 4 ,
.Xr autofs 8 ,
.Xr geli 8 ,
.Xr glabel 8 ,
.Xr mount 8
.Xr mount 8 ,
.Xr zpool 8
.Sh HISTORY
The
.Nm
@ -95,3 +123,5 @@ The
utility was developed by
.An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org
under sponsorship from the FreeBSD Foundation.
ZFS and GELI support was added by
.An Allan Jude Aq Mt allanjude@FreeBSD.org

28
usr.sbin/fstyp/fstyp.c
View File

@ -55,13 +55,18 @@ typedef int (*fstyp_function)(FILE *, char *, size_t);
static struct {
const char *name;
fstyp_function function;
bool unmountable;
} fstypes[] = {
{ "cd9660", &fstyp_cd9660 },
{ "ext2fs", &fstyp_ext2fs },
{ "msdosfs", &fstyp_msdosfs },
{ "ntfs", &fstyp_ntfs },
{ "ufs", &fstyp_ufs },
{ NULL, NULL }
{ "cd9660", &fstyp_cd9660, false },
{ "ext2fs", &fstyp_ext2fs, false },
{ "geli", &fstyp_geli, true },
{ "msdosfs", &fstyp_msdosfs, false },
{ "ntfs", &fstyp_ntfs, false },
{ "ufs", &fstyp_ufs, false },
#ifdef HAVE_CDDL
{ "zfs", &fstyp_zfs, true },
#endif
{ NULL, NULL, NULL }
};
void *
@ -124,7 +129,7 @@ static void
usage(void)
{
fprintf(stderr, "usage: fstyp [-l][-s] special\n");
fprintf(stderr, "usage: fstyp [-l] [-s] [-u] special\n");
exit(1);
}
@ -153,13 +158,13 @@ int
main(int argc, char **argv)
{
int ch, error, i, nbytes;
bool ignore_type = false, show_label = false;
bool ignore_type = false, show_label = false, show_unmountable = false;
char label[LABEL_LEN + 1], strvised[LABEL_LEN * 4 + 1];
char *path;
FILE *fp;
fstyp_function fstyp_f;
while ((ch = getopt(argc, argv, "ls")) != -1) {
while ((ch = getopt(argc, argv, "lsu")) != -1) {
switch (ch) {
case 'l':
show_label = true;
@ -167,6 +172,9 @@ main(int argc, char **argv)
case 's':
ignore_type = true;
break;
case 'u':
show_unmountable = true;
break;
default:
usage();
}
@ -193,6 +201,8 @@ main(int argc, char **argv)
memset(label, '\0', sizeof(label));
for (i = 0;; i++) {
if (show_unmountable == false && fstypes[i].unmountable == true)
continue;
fstyp_f = fstypes[i].function;
if (fstyp_f == NULL)
break;

4
usr.sbin/fstyp/fstyp.h
View File

@ -40,8 +40,12 @@ void rtrim(char *label, size_t size);
int fstyp_cd9660(FILE *fp, char *label, size_t size);
int fstyp_ext2fs(FILE *fp, char *label, size_t size);
int fstyp_geli(FILE *fp, char *label, size_t size);
int fstyp_msdosfs(FILE *fp, char *label, size_t size);
int fstyp_ntfs(FILE *fp, char *label, size_t size);
int fstyp_ufs(FILE *fp, char *label, size_t size);
#ifdef HAVE_CDDL
int fstyp_zfs(FILE *fp, char *label, size_t size);
#endif
#endif /* !FSTYP_H */

76
usr.sbin/fstyp/geli.c Normal file
View File

@ -0,0 +1,76 @@
/*-
* Copyright (c) 2015 Allan Jude <allanjude@FreeBSD.org>
* All rights reserved.
*
* This software was developed by Edward Tomasz Napierala under sponsorship
* from the FreeBSD Foundation.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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>
__FBSDID("$FreeBSD$");
#include <sys/disk.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <geom/eli/g_eli.h>
#include "fstyp.h"
int
fstyp_geli(FILE *fp, char *label __unused, size_t labelsize __unused)
{
int error;
off_t mediasize;
u_int sectorsize;
struct g_eli_metadata md;
u_char *buf;
error = ioctl(fileno(fp), DIOCGMEDIASIZE, &mediasize);
if (error != 0)
return (1);
error = ioctl(fileno(fp), DIOCGSECTORSIZE, &sectorsize);
if (error != 0)
return (1);
buf = (u_char *)read_buf(fp, mediasize - sectorsize, sectorsize);
if (buf == NULL)
goto gelierr;
error = eli_metadata_decode(buf, &md);
if (error)
goto gelierr;
if (strncmp(md.md_magic, "GEOM::ELI", 9) == 0) {
free(buf);
return (0);
}
gelierr:
free(buf);
return (1);
}

73
usr.sbin/fstyp/zfs.c Normal file
View File

@ -0,0 +1,73 @@
/*-
* Copyright (c) 2015 Allan Jude <allanjude@FreeBSD.org>
* All rights reserved.
*
* This software was developed by Edward Tomasz Napierala under sponsorship
* from the FreeBSD Foundation.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libnvpair.h>
#include <sys/vdev_impl.h>
#include "fstyp.h"
int
fstyp_zfs(FILE *fp, char *label, size_t labelsize)
{
vdev_label_t *zpool_ptr = NULL;
vdev_label_t zpool_label;
char *buf = zpool_label.vl_vdev_phys.vp_nvlist;
char *zpool_name = NULL;
size_t buflen = sizeof (zpool_label.vl_vdev_phys.vp_nvlist);
nvlist_t *config = NULL;
zpool_ptr = (vdev_label_t *)read_buf(fp, 0, sizeof(zpool_label));
if (zpool_ptr == NULL)
return (1);
zpool_label = *zpool_ptr;
if (nvlist_unpack(buf, buflen, &config, 0) != 0)
goto zfserr;
if (nvlist_lookup_string(config, "name", &zpool_name) != 0)
goto zfserr;
strlcpy(label, zpool_name, labelsize);
nvlist_free(config);
free(zpool_ptr);
return (0);
zfserr:
nvlist_free(config);
free(zpool_ptr);
return (1);
}