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Introduce GEOM_LABEL class.

Browse Source 
This class is used for detecting volume labels on file systems:
UFS, MSDOSFS (FAT12, FAT16, FAT32) and ISO9660.
It also provide native labelization (there is no need for file system).

g_label_ufs.c is based on geom_vol_ffs from Gordon Tetlow.
g_label_msdos.c and g_label_iso9660.c are probably hacks, I just found
where volume labels are stored and I use those offsets here,
but with this class it should be easy to do it as it should be done by
someone who know how.
Implementing volume labels detection for other file systems also should
be trivial.

New providers are created in those directories:
/dev/ufs/ (UFS1, UFS2)
/dev/msdosfs/ (FAT12, FAT16, FAT32)
/dev/iso9660/ (ISO9660)
/dev/label/ (native labels, configured with glabel(8))

Manual page cleanups and some comments inside were submitted by
Simon L. Nielsen, who was, as always, very helpful. Thanks!
This commit is contained in:
Pawel Jakub Dawidek 2004-07-02 19:40:36 +00:00
parent 11c798a4de
commit e1237b285b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=131476
17 changed files with 1184 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
MAINTAINERS
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@ -93,6 +93,7 @@ contrib/pf mlaier Pre-commit review requested.
binutils obrien Insists on BU blocked from unapproved commits
geom_concat pjd Pre-commit review requested.
geom_gate pjd Pre-commit review requested.
geom_label pjd Pre-commit review requested.
geom_nop pjd Pre-commit review requested.
geom_stripe pjd Pre-commit review requested.
sbin/geom pjd Pre-commit review requested.

2
etc/mtree/BSD.include.dist
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@ -84,6 +84,8 @@
..
gate
..
label
..
nop
..
stripe

2
include/Makefile
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@ -35,7 +35,7 @@ LSUBDIRS= cam/scsi dev/an dev/bktr dev/firewire dev/ic dev/iicbus \
dev/ofw dev/ppbus dev/smbus dev/usb dev/wi dev/utopia fs/devfs \
fs/fdescfs fs/fifofs fs/msdosfs fs/ntfs fs/nullfs fs/nwfs fs/portalfs \
fs/procfs fs/smbfs fs/udf fs/umapfs fs/unionfs \
geom/concat geom/gate geom/nop geom/stripe \
geom/concat geom/gate geom/label geom/nop geom/stripe \
isofs/cd9660 netatm/ipatm netatm/sigpvc netatm/spans netatm/uni \
netgraph/atm security/mac_biba security/mac_bsdextended \
security/mac_lomac security/mac_mls security/mac_partition \

1
sbin/geom/class/Makefile
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@ -1,6 +1,7 @@
# $FreeBSD$
SUBDIR= concat
SUBDIR+=label
SUBDIR+=nop
SUBDIR+=stripe

7
sbin/geom/class/label/Makefile Normal file
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@ -0,0 +1,7 @@
# $FreeBSD$
.PATH: ${.CURDIR}/../../misc
CLASS= label
.include <bsd.lib.mk>

187
sbin/geom/class/label/geom_label.c Normal file
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@ -0,0 +1,187 @@
/*-
* Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* 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 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/param.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <assert.h>
#include <libgeom.h>
#include <geom/label/g_label.h>
#include "core/geom.h"
#include "misc/subr.h"
uint32_t lib_version = G_LIB_VERSION;
uint32_t version = G_LABEL_VERSION;
static void label_main(struct gctl_req *req, unsigned flags);
static void label_label(struct gctl_req *req);
static void label_clear(struct gctl_req *req);
struct g_command class_commands[] = {
{ "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, NULL, G_NULL_OPTS },
{ "destroy", G_FLAG_VERBOSE, NULL,
{
{ 'f', "force", NULL, G_TYPE_NONE },
G_OPT_SENTINEL
}
},
{ "label", G_FLAG_VERBOSE | G_FLAG_LOADKLD, label_main, G_NULL_OPTS },
{ "clear", G_FLAG_VERBOSE, label_main, G_NULL_OPTS },
G_CMD_SENTINEL
};
static int verbose = 0;
void usage(const char *name);
void
usage(const char *name)
{
fprintf(stderr, "usage: %s create [-v] <name> <dev>\n", name);
fprintf(stderr, " %s destroy [-fv] <name> [name2 [...]]\n", name);
fprintf(stderr, " %s label [-v] <name> <dev>\n", name);
fprintf(stderr, " %s clear [-v] <dev1> [dev2 [...]]\n", name);
}
static void
label_main(struct gctl_req *req, unsigned flags)
{
const char *name;
if ((flags & G_FLAG_VERBOSE) != 0)
verbose = 1;
name = gctl_get_asciiparam(req, "verb");
if (name == NULL) {
gctl_error(req, "No '%s' argument.", "verb");
return;
}
if (strcmp(name, "label") == 0)
label_label(req);
else if (strcmp(name, "clear") == 0)
label_clear(req);
else
gctl_error(req, "Unknown command: %s.", name);
}
static void
label_label(struct gctl_req *req)
{
struct g_label_metadata md;
const char *name, *label;
u_char sector[512];
int *nargs, error;
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs != 2) {
gctl_error(req, "Invalid number of arguments.");
return;
}
/*
* Clear last sector first to spoil all components if device exists.
*/
name = gctl_get_asciiparam(req, "arg1");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 1);
return;
}
error = g_metadata_clear(name, NULL);
if (error != 0) {
gctl_error(req, "Can't store metadata on %s: %s.", name,
strerror(error));
return;
}
strlcpy(md.md_magic, G_LABEL_MAGIC, sizeof(md.md_magic));
md.md_version = G_LABEL_VERSION;
label = gctl_get_asciiparam(req, "arg0");
if (label == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
strlcpy(md.md_label, label, sizeof(md.md_label));
/*
* Ok, store metadata.
*/
label_metadata_encode(&md, sector);
error = g_metadata_store(name, sector, sizeof(sector));
if (error != 0) {
fprintf(stderr, "Can't store metadata on %s: %s.\n", name,
strerror(error));
gctl_error(req, "Not done.");
}
if (verbose)
printf("Metadata value stored on %s.\n", name);
}
static void
label_clear(struct gctl_req *req)
{
const char *name;
char param[16];
unsigned i;
int *nargs, error;
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs < 1) {
gctl_error(req, "Too few arguments.");
return;
}
for (i = 0; i < (unsigned)*nargs; i++) {
snprintf(param, sizeof(param), "arg%u", i);
name = gctl_get_asciiparam(req, param);
error = g_metadata_clear(name, G_LABEL_MAGIC);
if (error != 0) {
fprintf(stderr, "Can't clear metadata on %s: %s.\n",
name, strerror(error));
gctl_error(req, "Not fully done.");
continue;
}
if (verbose)
printf("Metadata cleared on %s.\n", name);
}
}

182
sbin/geom/class/label/glabel.8 Normal file
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@ -0,0 +1,182 @@
.\" Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
.\" 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 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.
.\"
.\" $FreeBSD$
.\"
.Dd Jul 2, 2004
.Dt GLABEL 8
.Os
.Sh NAME
.Nm glabel
.Nd "disk labelization control utility"
.Sh SYNOPSIS
.Nm
.Cm create
.Op Fl v
.Ar name
.Ar dev
.Nm
.Cm label
.Op Fl v
.Ar name
.Ar dev
.Nm
.Cm destroy
.Op Fl fv
.Ar name
.Op Ar name Op Ar ...
.Nm
.Cm clear
.Op Fl v
.Ar dev
.Op Ar dev Op Ar ...
.Nm
.Cm list
.Op Ar prov Op Ar ...
.Nm
.Cm load
.Op Fl v
.Nm
.Cm unload
.Op Fl v
.Sh DESCRIPTION
The
.Nm
utility is used for GEOM providers labelization.
A label can be setup on a GEOM provider in two ways:
.Dq manual
or
.Dq automatic .
When using the
.Dq manual
method, no metadata are stored on the devices, so a label has to be configured
by hand every time it is needed.
The
.Dq automatic
method use on-disk metadata to store label and detect it automatically in the
future.
.Pp
This class also provide volume label detection for file systems.
Those labels cannot be set with
.Nm ,
but must be set with the appropriate file system utility, e.g. for UFS
the file system label is set with
.Xr tunefs 8 .
Currently supported file systems are:
.Pp
.Bl -bullet -offset indent -compact
.It
UFS1 (directory
.Pa /dev/ufs/ ) .
.It
UFS2 (directory
.Pa /dev/ufs/ ) .
.It
MSDOSFS (FAT12, FAT16, FAT32) (directory
.Pa /dev/msdosfs/ ) .
.It
CD ISO9660 (directory
.Pa /dev/iso9660/ ) .
.El
.Pp
Non file-system labels are created in the directory
.Pa /dev/label/ .
.Pp
The first argument to
.Nm
indicates an action to be performed:
.Bl -tag -width ".Cm destroy"
.It Cm create
Create temporary label
.Ar name
for the given provider.
This is the
.Dq manual
method.
The kernel module
.Pa geom_label.ko
will be loaded if it is not loaded already.
.It Cm label
Setup a label
.Ar name
for the given provider.
This is the
.Dq automatic
method, where metadata are stored in provider's last sector.
The kernel module
.Pa geom_label.ko
will be loaded if it is not loaded already.
.It Cm destroy
Turn off the given labels by its
.Ar name .
.It Cm clear
Clear metadata on the given devices.
.It Cm list
List all currently configured devices, or list the given devices.
.It Cm load
Load
.Pa geom_label.ko
kernel module.
.It Cm unload
Unload
.Pa geom_label.ko
kernel module.
.El
.Pp
Additional options:
.Bl -tag -width indent
.It Fl f
Force the removal of the specified labels.
.It Fl v
Be more verbose.
.El
.Sh EXAMPLES
The following example shows how to setup a label for disk da2,
create a file system on it, and mount it:
.Bd -literal -offset indent
glabel label -v usr /dev/da2
newfs /dev/label/usr
mount /dev/label/usr /usr
.Ed
.Pp
The next example shows how to setup a label for a UFS file system:
.Bd -literal -offset indent
tunefs -L data /dev/da4s1a
mount /dev/ufs/data /mnt/data
.Ed
.Sh DIAGNOSTICS
Exit status is 0 on success, and 1 if the command fails.
.Sh SEE ALSO
.Xr geom 4 ,
.Xr geom 8 ,
.Xr mount 8 ,
.Xr newfs 8 ,
.Xr tunefs 8
.Sh HISTORY
The
.Nm
utility appeared in
.Fx 5.3 .
.Sh AUTHORS
.An Pawel Jakub Dawidek Aq pjd@FreeBSD.org

1
sys/conf/NOTES
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@ -125,6 +125,7 @@ options GEOM_CONCAT # Disk concatenation.
options GEOM_FOX # Redundant path mitigation
options GEOM_GATE # Userland services.
options GEOM_GPT # GPT partitioning
options GEOM_LABEL # Providers labelization.
options GEOM_MBR # DOS/MBR partitioning
options GEOM_NOP # Test class.
options GEOM_PC98 # NEC PC9800 partitioning

4
sys/conf/files
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@ -940,6 +940,10 @@ crypto/rijndael/rijndael-api-fst.c optional geom_bde
crypto/sha2/sha2.c optional geom_bde
geom/concat/g_concat.c optional geom_concat
geom/gate/g_gate.c optional geom_gate
geom/label/g_label.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_ufs.c optional geom_label
geom/nop/g_nop.c optional geom_nop
geom/stripe/g_stripe.c optional geom_stripe
geom/geom_aes.c optional geom_aes

1
sys/conf/options
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@ -71,6 +71,7 @@ GEOM_CONCAT opt_geom.h
GEOM_FOX opt_geom.h
GEOM_GATE opt_geom.h
GEOM_GPT opt_geom.h
GEOM_LABEL opt_geom.h
GEOM_MBR opt_geom.h
GEOM_MIRROR opt_geom.h
GEOM_NOP opt_geom.h

405
sys/geom/label/g_label.c Normal file
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@ -0,0 +1,405 @@
/*-
* Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* 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 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bio.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <geom/geom.h>
#include <geom/geom_slice.h>
#include <geom/label/g_label.h>
SYSCTL_DECL(_kern_geom);
SYSCTL_NODE(_kern_geom, OID_AUTO, label, CTLFLAG_RW, 0, "GEOM_LABEL stuff");
u_int g_label_debug = 0;
SYSCTL_UINT(_kern_geom_label, OID_AUTO, debug, CTLFLAG_RW, &g_label_debug, 0,
"Debug level");
static int g_label_destroy(struct g_geom *gp, boolean_t force);
static struct g_geom *g_label_taste(struct g_class *mp, struct g_provider *pp,
int flags __unused);
static void g_label_config(struct gctl_req *req, struct g_class *mp,
const char *verb);
struct g_class g_label_class = {
.name = G_LABEL_CLASS_NAME,
.ctlreq = g_label_config,
.taste = g_label_taste
};
/*
* To add a new file system where you want to look for volume labels,
* you have to:
* 1. Add a file which implements looking for volume labels.
* 2. Add an 'extern const struct g_label_desc g_label_<your file system>;'.
* 3. Add an element to the table below '&g_label_<your_file_system>,'.
*/
const struct g_label_desc *g_labels[] = {
&g_label_ufs,
&g_label_iso9660,
&g_label_msdosfs,
NULL
};
static void
g_label_orphan(struct g_consumer *cp __unused)
{
KASSERT(1 == 0, ("%s called?", __func__));
}
static void
g_label_start(struct bio *bp __unused)
{
KASSERT(1 == 0, ("%s called?", __func__));
}
static int
g_label_access(struct g_provider *pp __unused, int dr __unused, int dw __unused,
int de __unused)
{
KASSERT(1 == 0, ("%s called", __func__));
return (EOPNOTSUPP);
}
static struct g_geom *
g_label_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp,
const char *label, const char *dir, off_t mediasize)
{
struct g_geom *gp;
struct g_provider *pp2;
struct g_consumer *cp;
char name[64];
g_topology_assert();
gp = NULL;
cp = NULL;
snprintf(name, sizeof(name), "%s/%s", dir, label);
LIST_FOREACH(gp, &mp->geom, geom) {
pp2 = LIST_FIRST(&gp->provider);
if (pp2 == NULL)
continue;
if (strcmp(pp2->name, name) == 0) {
G_LABEL_DEBUG(1, "Label %s(%s) already exists (%s).",
label, name, pp->name);
if (req != NULL) {
gctl_error(req, "Provider %s already exists.",
name);
}
return (NULL);
}
}
gp = g_slice_new(mp, 1, pp, &cp, NULL, 0, NULL);
if (gp == NULL) {
G_LABEL_DEBUG(0, "Cannot create slice %s.", label);
if (req != NULL)
gctl_error(req, "Cannot create slice %s.", label);
return (NULL);
}
g_access(cp, -1, 0, 0);
g_slice_config(gp, 0, G_SLICE_CONFIG_SET, (off_t)0, mediasize,
pp->sectorsize, name);
G_LABEL_DEBUG(0, "Label for provider %s is %s.", pp->name, name);
return (gp);
}
static int
g_label_destroy(struct g_geom *gp, boolean_t force)
{
struct g_provider *pp;
g_topology_assert();
pp = LIST_FIRST(&gp->provider);
if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) {
if (force) {
G_LABEL_DEBUG(0, "Provider %s is still open, so it "
"can't be definitely removed.", pp->name);
} else {
G_LABEL_DEBUG(1,
"Provider %s is still open (r%dw%de%d).", pp->name,
pp->acr, pp->acw, pp->ace);
return (EBUSY);
}
} else {
G_LABEL_DEBUG(0, "Label %s removed.",
LIST_FIRST(&gp->provider)->name);
}
g_slice_spoiled(LIST_FIRST(&gp->consumer));
return (0);
}
static int
g_label_read_metadata(struct g_consumer *cp, struct g_label_metadata *md)
{
struct g_provider *pp;
u_char *buf;
int error;
g_topology_assert();
pp = cp->provider;
g_topology_unlock();
buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
&error);
g_topology_lock();
if (buf == NULL)
return (error);
/* Decode metadata. */
label_metadata_decode(buf, md);
g_free(buf);
return (0);
}
static struct g_geom *
g_label_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
{
struct g_label_metadata md;
struct g_consumer *cp;
struct g_geom *gp;
int error, i;
g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
g_topology_assert();
G_LABEL_DEBUG(3, "Tasting %s.", pp->name);
if (strcmp(pp->geom->class->name, mp->name) == 0)
return (NULL);
gp = g_new_geomf(mp, "label:taste");
gp->start = g_label_start;
gp->access = g_label_access;
gp->orphan = g_label_orphan;
cp = g_new_consumer(gp);
g_attach(cp, pp);
error = g_access(cp, 1, 0, 0);
if (error != 0)
return (NULL);
do {
error = g_label_read_metadata(cp, &md);
if (error != 0)
break;
if (strcmp(md.md_magic, G_LABEL_MAGIC) != 0)
break;
if (md.md_version > G_LABEL_VERSION) {
printf("geom_label.ko module is too old to handle %s.\n",
pp->name);
break;
}
g_label_create(NULL, mp, pp, md.md_label, G_LABEL_DIR,
pp->mediasize - pp->sectorsize);
} while (0);
for (i = 0; g_labels[i] != NULL; i++) {
char label[64];
g_topology_unlock();
g_labels[i]->ld_taste(cp, label, sizeof(label));
g_topology_lock();
if (label[0] == '\0')
continue;
g_label_create(NULL, mp, pp, label, g_labels[i]->ld_dir,
pp->mediasize);
}
g_access(cp, -1, 0, 0);
g_wither_geom(gp, ENXIO);
return (NULL);
}
static void
g_label_ctl_create(struct gctl_req *req, struct g_class *mp)
{
struct g_provider *pp;
const char *name;
int *nargs;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument", "nargs");
return;
}
if (*nargs != 2) {
gctl_error(req, "Invalid number of argument.");
return;
}
/*
* arg1 is the name of provider.
*/
name = gctl_get_asciiparam(req, "arg1");
if (name == NULL) {
gctl_error(req, "No 'arg%d' argument", 1);
return;
}
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
pp = g_provider_by_name(name);
if (pp == NULL) {
G_LABEL_DEBUG(1, "Provider %s is invalid.", name);
gctl_error(req, "Provider %s is invalid.", name);
return;
}
/*
* arg0 is the label.
*/
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%d' argument", 0);
return;
}
g_label_create(req, mp, pp, name, G_LABEL_DIR, pp->mediasize);
}
static const char *
g_label_skip_dir(const char *name)
{
char path[64];
u_int i;
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
if (strncmp(name, G_LABEL_DIR "/", strlen(G_LABEL_DIR "/")) == 0)
name += strlen(G_LABEL_DIR "/");
for (i = 0; g_labels[i] != NULL; i++) {
snprintf(path, sizeof(path), "%s/", g_labels[i]->ld_dir);
if (strncmp(name, path, strlen(path)) == 0) {
name += strlen(path);
break;
}
}
return (name);
}
static struct g_geom *
g_label_find_geom(struct g_class *mp, const char *name)
{
struct g_geom *gp;
struct g_provider *pp;
const char *pname;
name = g_label_skip_dir(name);
LIST_FOREACH(gp, &mp->geom, geom) {
pp = LIST_FIRST(&gp->provider);
pname = g_label_skip_dir(pp->name);
if (strcmp(pname, name) == 0)
return (gp);
}
return (NULL);
}
static void
g_label_ctl_destroy(struct gctl_req *req, struct g_class *mp)
{
int *nargs, *force, error, i;
struct g_geom *gp;
const char *name;
char param[16];
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument", "nargs");
return;
}
if (*nargs <= 0) {
gctl_error(req, "Missing device(s).");
return;
}
force = gctl_get_paraml(req, "force", sizeof(*force));
if (force == NULL) {
gctl_error(req, "No 'force' argument");
return;
}
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
name = gctl_get_asciiparam(req, param);
if (name == NULL) {
gctl_error(req, "No 'arg%d' argument", i);
return;
}
gp = g_label_find_geom(mp, name);
if (gp == NULL) {
G_LABEL_DEBUG(1, "Label %s is invalid.", name);
gctl_error(req, "Label %s is invalid.", name);
return;
}
error = g_label_destroy(gp, *force);
if (error != 0) {
gctl_error(req, "Cannot destroy label %s (error=%d).",
LIST_FIRST(&gp->provider)->name, error);
return;
}
}
}
static void
g_label_config(struct gctl_req *req, struct g_class *mp, const char *verb)
{
uint32_t *version;
g_topology_assert();
version = gctl_get_paraml(req, "version", sizeof(*version));
if (version == NULL) {
gctl_error(req, "No '%s' argument.", "version");
return;
}
if (*version != G_LABEL_VERSION) {
gctl_error(req, "Userland and kernel parts are out of sync.");
return;
}
if (strcmp(verb, "create") == 0) {
g_label_ctl_create(req, mp);
return;
} else if (strcmp(verb, "destroy") == 0) {
g_label_ctl_destroy(req, mp);
return;
}
gctl_error(req, "Unknown verb.");
}
DECLARE_GEOM_CLASS(g_label_class, g_label);

97
sys/geom/label/g_label.h Normal file
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@ -0,0 +1,97 @@
/*-
* Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* 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 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.
*
* $FreeBSD$
*/
#ifndef _G_LABEL_H_
#define _G_LABEL_H_
#include <sys/endian.h>
#define G_LABEL_CLASS_NAME "LABEL"
#define G_LABEL_MAGIC "GEOM::LABEL"
#define G_LABEL_VERSION 0
#define G_LABEL_DIR "label"
#ifdef _KERNEL
extern u_int g_label_debug;
#define G_LABEL_DEBUG(lvl, ...) do { \
if (g_label_debug >= (lvl)) { \
printf("GEOM_LABEL"); \
if (g_label_debug > 0) \
printf("[%u]", lvl); \
printf(": "); \
printf(__VA_ARGS__); \
printf("\n"); \
} \
} while (0)
#define G_LABEL_LOGREQ(bp, ...) do { \
if (g_label_debug >= 2) { \
printf("GEOM_LABEL[2]: "); \
printf(__VA_ARGS__); \
printf(" "); \
g_print_bio(bp); \
printf("\n"); \
} \
} while (0)
typedef void g_label_taste_t (struct g_consumer *cp, char *label, size_t size);
struct g_label_desc {
g_label_taste_t *ld_taste;
char *ld_dir;
};
/* Supported labels. */
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;
#endif /* _KERNEL */
struct g_label_metadata {
char md_magic[16]; /* Magic value. */
uint32_t md_version; /* Version number. */
char md_label[16]; /* Label. */
};
static __inline void
label_metadata_encode(const struct g_label_metadata *md, u_char *data)
{
bcopy(md->md_magic, data, sizeof(md->md_magic));
le32enc(data + 16, md->md_version);
bcopy(md->md_label, data + 20, sizeof(md->md_label));
}
static __inline void
label_metadata_decode(const u_char *data, struct g_label_metadata *md)
{
bcopy(data, md->md_magic, sizeof(md->md_magic));
md->md_version = le32dec(data + 16);
bcopy(data + 20, md->md_label, sizeof(md->md_label));
}
#endif /* _G_LABEL_H_ */

80
sys/geom/label/g_label_iso9660.c Normal file
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@ -0,0 +1,80 @@
/*-
* Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* 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 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/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 G_LABEL_ISO9660_DIR "iso9660"
#define ISO9660_MAGIC "\x01" "CD001" "\x01\x00"
#define VOLUME_LEN 32
static void
g_label_iso9660_taste(struct g_consumer *cp, char *label, size_t size)
{
struct g_provider *pp;
char *sector, *volume;
int i, error;
g_topology_assert_not();
pp = cp->provider;
label[0] = '\0';
sector = (char *)g_read_data(cp, 0x8000, pp->sectorsize, &error);
if (sector == NULL || error != 0)
return;
if (bcmp(sector, ISO9660_MAGIC, sizeof(ISO9660_MAGIC) - 1) != 0) {
g_free(sector);
return;
}
G_LABEL_DEBUG(1, "ISO9660 file system detected on %s.", pp->name);
volume = sector + 0x28;
bzero(label, size);
strlcpy(label, volume, MIN(size, VOLUME_LEN));
g_free(sector);
for (i = size - 1; i > 0; i--) {
if (label[i] == '\0')
continue;
else if (label[i] == ' ')
label[i] = '\0';
else
break;
}
}
const struct g_label_desc g_label_iso9660 = {
.ld_taste = g_label_iso9660_taste,
.ld_dir = G_LABEL_ISO9660_DIR
};

101
sys/geom/label/g_label_msdosfs.c Normal file
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@ -0,0 +1,101 @@
/*-
* Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* 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 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/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 G_LABEL_MSDOSFS_DIR "msdosfs"
#define FAT12 "FAT12 "
#define FAT16 "FAT16 "
#define FAT32 "FAT32 "
#define VOLUME_LEN 11
#define NO_NAME "NO NAME "
static void
g_label_msdosfs_taste(struct g_consumer *cp, char *label, size_t size)
{
struct g_provider *pp;
char *sector, *volume;
int i, error;
g_topology_assert_not();
pp = cp->provider;
label[0] = '\0';
sector = (char *)g_read_data(cp, 0, pp->sectorsize, &error);
if (sector == NULL || error != 0)
return;
if (strncmp(sector + 0x36, FAT12, strlen(FAT12)) == 0) {
G_LABEL_DEBUG(1, "MSDOS (FAT12) file system detected on %s.",
pp->name);
volume = sector + 0x2b;
} else if (strncmp(sector + 0x36, FAT16, strlen(FAT16)) == 0) {
G_LABEL_DEBUG(1, "MSDOS (FAT16) file system detected on %s.",
pp->name);
volume = sector + 0x2b;
} else if (strncmp(sector + 0x52, FAT32, strlen(FAT32)) == 0) {
G_LABEL_DEBUG(1, "MSDOS (FAT32) file system detected on %s.",
pp->name);
volume = sector + 0x47;
} else {
g_free(sector);
return;
}
if (strncmp(volume, NO_NAME, VOLUME_LEN) == 0) {
g_free(sector);
return;
}
if (volume[0] == '\0') {
g_free(sector);
return;
}
bzero(label, size);
strlcpy(label, volume, MIN(size, VOLUME_LEN));
g_free(sector);
for (i = size - 1; i > 0; i--) {
if (label[i] == '\0')
continue;
else if (label[i] == ' ')
label[i] = '\0';
else
break;
}
}
const struct g_label_desc g_label_msdosfs = {
.ld_taste = g_label_msdosfs_taste,
.ld_dir = G_LABEL_MSDOSFS_DIR
};

102
sys/geom/label/g_label_ufs.c Normal file
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@ -0,0 +1,102 @@
/*-
* Copyright (c) 2002, 2003 Gordon Tetlow
* 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 <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <geom/geom.h>
#include <geom/label/g_label.h>
#define G_LABEL_UFS_DIR "ufs"
static const int superblocks[] = SBLOCKSEARCH;
static void
g_label_ufs_taste(struct g_consumer *cp, char *label, size_t size)
{
struct g_provider *pp;
int error, sb, superblock;
struct fs *fs;
g_topology_assert_not();
pp = cp->provider;
label[0] = '\0';
/*
* Walk through the standard places that superblocks hide and look
* for UFS magic. If we find magic, then check that the size in the
* superblock corresponds to the size of the underlying provider.
* Finally, look for a volume label and create an appropriate
* provider based on that.
*/
for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) {
fs = (struct fs *)g_read_data(cp, superblock, SBLOCKSIZE,
&error);
if (fs == NULL || error != 0)
continue;
/* Check for magic and make sure things are the right size */
if (fs->fs_magic == FS_UFS1_MAGIC) {
G_LABEL_DEBUG(1, "UFS1 file system detected on %s.",
pp->name);
if (fs->fs_old_size * fs->fs_fsize !=
(int32_t)pp->mediasize) {
g_free(fs);
continue;
}
} else if (fs->fs_magic == FS_UFS2_MAGIC) {
G_LABEL_DEBUG(1, "UFS2 file system detected on %s.",
pp->name);
if (fs->fs_size * fs->fs_fsize !=
(int64_t)pp->mediasize) {
g_free(fs);
continue;
}
} else {
g_free(fs);
continue;
}
/* Check for volume label */
if (fs->fs_volname[0] == '\0') {
g_free(fs);
continue;
}
strlcpy(label, fs->fs_volname, size);
g_free(fs);
break;
}
}
const struct g_label_desc g_label_ufs = {
.ld_taste = g_label_ufs_taste,
.ld_dir = G_LABEL_UFS_DIR
};

1
sys/modules/geom/Makefile
View File

@ -8,6 +8,7 @@ SUBDIR= geom_apple \
geom_fox \
geom_gate \
geom_gpt \
geom_label \
geom_mbr \
geom_nop \
geom_pc98 \

11
sys/modules/geom/geom_label/Makefile Normal file
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@ -0,0 +1,11 @@
# $FreeBSD$
.PATH: ${.CURDIR}/../../../geom/label
KMOD= geom_label
SRCS= g_label.c
SRCS+= g_label_iso9660.c
SRCS+= g_label_msdosfs.c
SRCS+= g_label_ufs.c
.include <bsd.kmod.mk>