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Add code for Ext2FS and ReiserFS labels recognition.

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Submitted by:	Stanislav Sedov <stas@310.ru>
PR:		kern/84638
MFC after:	1 week
This commit is contained in:
Pawel Jakub Dawidek 2005-08-12 00:27:45 +00:00
parent 055c32a1bc
commit 9417a618d1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=148978
7 changed files with 216 additions and 0 deletions
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6
sbin/geom/class/label/glabel.8
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@ -102,6 +102,12 @@ MSDOSFS (FAT12, FAT16, FAT32) (directory
.It
CD ISO9660 (directory
.Pa /dev/iso9660/ ) .
.It
EXT2FS (directory
.Pa /dev/ext2fs/ ) .
.It
REISERFS (directory
.Pa /dev/reiserfs/ ) .
.El
.Pp
Non file-system labels are created in the directory

2
sys/conf/files
View File

@ -1060,8 +1060,10 @@ geom/geom_sunlabel_enc.c optional geom_sunlabel
geom/geom_vfs.c standard
geom/geom_vol_ffs.c optional geom_vol
geom/label/g_label.c optional geom_label
geom/label/g_label_ext2fs.c optional geom_label
geom/label/g_label_iso9660.c optional geom_label
geom/label/g_label_msdosfs.c optional geom_label
geom/label/g_label_reiserfs.c optional geom_label
geom/label/g_label_ufs.c optional geom_label
geom/mirror/g_mirror.c optional geom_mirror
geom/mirror/g_mirror_ctl.c optional geom_mirror

2
sys/geom/label/g_label.c
View File

@ -75,6 +75,8 @@ const struct g_label_desc *g_labels[] = {
&g_label_ufs,
&g_label_iso9660,
&g_label_msdosfs,
&g_label_ext2fs,
&g_label_reiserfs,
NULL
};

2
sys/geom/label/g_label.h
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@ -67,6 +67,8 @@ struct g_label_desc {
extern const struct g_label_desc g_label_ufs;
extern const struct g_label_desc g_label_iso9660;
extern const struct g_label_desc g_label_msdosfs;
extern const struct g_label_desc g_label_ext2fs;
extern const struct g_label_desc g_label_reiserfs;
#endif /* _KERNEL */
struct g_label_metadata {

89
sys/geom/label/g_label_ext2fs.c Normal file
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@ -0,0 +1,89 @@
/*-
* Copyright (c) 2005 Stanislav Sedov
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <geom/geom.h>
#include <geom/label/g_label.h>
#define EXT2FS_SB_OFFSET 1024
#define EXT2_SUPER_MAGIC 0xef53
#define EXT2_DYNAMIC_REV 1
typedef struct e2sb {
uint8_t fake1[56];
uint16_t s_magic;
uint8_t fake2[18];
uint32_t s_rev_level;
uint8_t fake3[40];
char s_volume_name[16];
} e2sb_t;
static void
g_label_ext2fs_taste(struct g_consumer *cp, char *label, size_t size)
{
struct g_provider *pp;
e2sb_t *fs;
g_topology_assert_not();
pp = cp->provider;
label[0] = '\0';
fs = (e2sb_t *)g_read_data(cp, EXT2FS_SB_OFFSET, pp->sectorsize, NULL);
if (fs == NULL)
return;
/* Check for magic and versio n*/
if (fs->s_magic == EXT2_SUPER_MAGIC &&
fs->s_rev_level == EXT2_DYNAMIC_REV) {
G_LABEL_DEBUG(1, "ext2fs file system detected on %s.",
pp->name);
} else {
goto exit_free;
}
/* Check for volume label */
if (fs->s_volume_name[0] == '\0')
goto exit_free;
/* Terminate label */
fs->s_volume_name[sizeof(fs->s_volume_name) - 1] = '\0';
strlcpy(label, fs->s_volume_name, size);
exit_free:
g_free(fs);
}
const struct g_label_desc g_label_ext2fs = {
.ld_taste = g_label_ext2fs_taste,
.ld_dir = "ext2fs"
};

113
sys/geom/label/g_label_reiserfs.c Normal file
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@ -0,0 +1,113 @@
/*-
* Copyright (c) 2005 Stanislav Sedov
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <geom/geom.h>
#include <geom/label/g_label.h>
#define REISERFS_NEW_DISK_OFFSET 64 * 1024
#define REISERFS_OLD_DISK_OFFSET 8 * 1024
#define REISERFS_SUPER_MAGIC "ReIsEr"
typedef struct resiserfs_sb {
uint8_t fake1[52];
char s_magic[10];
uint8_t fake2[10];
uint16_t s_version;
uint8_t fake3[26];
char s_volume_name[16];
} reiserfs_sb_t;
static reiserfs_sb_t *
g_label_reiserfs_read_super(struct g_consumer *cp, off_t offset, off_t len)
{
reiserfs_sb_t *fs;
fs = (reiserfs_sb_t *)g_read_data(cp, offset, len, NULL);
if (fs == NULL)
return (NULL);
if (strncmp(fs->s_magic, REISERFS_SUPER_MAGIC,
strlen(REISERFS_SUPER_MAGIC)) != 0) {
g_free(fs);
return (NULL);
}
return (fs);
}
static void
g_label_reiserfs_taste(struct g_consumer *cp, char *label, size_t size)
{
struct g_provider *pp;
reiserfs_sb_t *fs;
g_topology_assert_not();
pp = cp->provider;
label[0] = '\0';
/* Try old format */
fs = g_label_reiserfs_read_super(cp, REISERFS_OLD_DISK_OFFSET,
pp->sectorsize);
if (fs == NULL) {
/* Try new format */
fs = g_label_reiserfs_read_super(cp, REISERFS_NEW_DISK_OFFSET,
pp->sectorsize);
}
if (fs == NULL)
return;
/* Check version */
if (fs->s_version == 2) {
G_LABEL_DEBUG(1, "reiserfs file system detected on %s.",
pp->name);
} else {
goto exit_free;
}
/* Check for volume label */
if (fs->s_volume_name[0] == '\0')
goto exit_free;
/* Terminate label */
fs->s_volume_name[sizeof(fs->s_volume_name) - 1] = '\0';
strlcpy(label, fs->s_volume_name, size);
exit_free:
g_free(fs);
}
const struct g_label_desc g_label_reiserfs = {
.ld_taste = g_label_reiserfs_taste,
.ld_dir = "reiserfs"
};

2
sys/modules/geom/geom_label/Makefile
View File

@ -4,8 +4,10 @@
KMOD= geom_label
SRCS= g_label.c
SRCS+= g_label_ext2fs.c
SRCS+= g_label_iso9660.c
SRCS+= g_label_msdosfs.c
SRCS+= g_label_reiserfs.c
SRCS+= g_label_ufs.c
.include <bsd.kmod.mk>