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/*-
* Copyright (c) 2012 Ivan Voras <ivoras@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/geom_disk.h>
#include <geom/label/g_label.h>
#include <geom/multipath/g_multipath.h>
#define G_LABEL_DISK_IDENT_DIR "diskid"
static char* classes_pass[] = { G_DISK_CLASS_NAME, G_MULTIPATH_CLASS_NAME,
NULL };
static void
g_label_disk_ident_taste(struct g_consumer *cp, char *label, size_t size)
{
struct g_class *cls;
char ident[100];
int ident_len, found, i;
g_topology_assert_not();
label[0] = '\0';
cls = cp->provider->geom->class;
/*
* Get the GEOM::ident string, and construct a label in the format
* "CLASS_NAME-ident"
*/
ident_len = sizeof(ident);
if (g_io_getattr("GEOM::ident", cp, &ident_len, ident) == 0) {
if (ident_len == 0 || ident[0] == '\0')
return;
for (i = 0, found = 0; classes_pass[i] != NULL; i++)
if (strcmp(classes_pass[i], cls->name) == 0) {
found = 1;
break;
}
if (!found)
return;
/*
* We can safely ignore the result of snprintf(): the label
* will simply be truncated, which at most is only annoying.
*/
(void)snprintf(label, size, "%s-%s", cls->name, ident);
}
}
struct g_label_desc g_label_disk_ident = {
.ld_taste = g_label_disk_ident_taste,
.ld_dir = G_LABEL_DISK_IDENT_DIR,
.ld_enabled = 1
};
G_LABEL_INIT(disk_ident, g_label_disk_ident, "Create device nodes for drives "
"which export a disk identification string");
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