89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/*-
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* Copyright (c) 2012 Ivan Voras <ivoras@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <geom/geom.h>
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#include <geom/geom_disk.h>
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#include <geom/label/g_label.h>
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#include <geom/multipath/g_multipath.h>
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#define G_LABEL_DISK_IDENT_DIR "diskid"
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static char* classes_pass[] = { G_DISK_CLASS_NAME, G_MULTIPATH_CLASS_NAME,
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NULL };
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static void
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g_label_disk_ident_taste(struct g_consumer *cp, char *label, size_t size)
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{
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struct g_class *cls;
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char ident[100];
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int ident_len, found, i;
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g_topology_assert_not();
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label[0] = '\0';
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cls = cp->provider->geom->class;
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/*
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* Get the GEOM::ident string, and construct a label in the format
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* "CLASS_NAME-ident"
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*/
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ident_len = sizeof(ident);
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if (g_io_getattr("GEOM::ident", cp, &ident_len, ident) == 0) {
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if (ident_len == 0 || ident[0] == '\0')
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return;
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for (i = 0, found = 0; classes_pass[i] != NULL; i++)
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if (strcmp(classes_pass[i], cls->name) == 0) {
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found = 1;
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break;
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}
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if (!found)
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return;
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/*
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* We can safely ignore the result of snprintf(): the label
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* will simply be truncated, which at most is only annoying.
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*/
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(void)snprintf(label, size, "%s-%s", cls->name, ident);
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}
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}
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struct g_label_desc g_label_disk_ident = {
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.ld_taste = g_label_disk_ident_taste,
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.ld_dir = G_LABEL_DISK_IDENT_DIR,
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.ld_enabled = 1
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};
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G_LABEL_INIT(disk_ident, g_label_disk_ident, "Create device nodes for drives "
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"which export a disk identification string");
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