1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2019 Ian Lepore <ian@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <sys/malloc.h>
32 #include <sys/slicer.h>
33
34 #include <geom/geom.h>
35 #include <geom/geom_flashmap.h>
36 #include <geom/geom_slice.h>
37 #include <geom/label/g_label.h>
38
39 static void
g_label_flashmap_taste(struct g_consumer * cp,char * label,size_t size)40 g_label_flashmap_taste(struct g_consumer *cp, char *label, size_t size)
41 {
42 struct g_flashmap *gfp;
43 struct g_slicer *gsp;
44 struct g_provider *pp;
45
46 g_topology_assert_not();
47
48 pp = cp->provider;
49 label[0] = '\0';
50
51 /* We taste only partitions handled by flashmap */
52 if (strncmp(pp->geom->class->name, FLASHMAP_CLASS_NAME,
53 sizeof(FLASHMAP_CLASS_NAME)) != 0)
54 return;
55
56 gsp = (struct g_slicer *)pp->geom->softc;
57 gfp = (struct g_flashmap *)gsp->softc;
58
59 /* If it's handled by flashmap it should have a label, but be safe. */
60 if (gfp->labels[pp->index] == NULL)
61 return;
62
63 strlcpy(label, gfp->labels[pp->index], size);
64 }
65
66 struct g_label_desc g_label_flashmap = {
67 .ld_taste = g_label_flashmap_taste,
68 .ld_dirprefix = "flash/",
69 .ld_enabled = 1
70 };
71
72 G_LABEL_INIT(flashmap, g_label_flashmap, "Create device nodes for Flashmap labels");
73