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/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/malloc.h> 35 #include <sys/slicer.h> 36 37 #include <geom/geom.h> 38 #include <geom/geom_flashmap.h> 39 #include <geom/geom_slice.h> 40 #include <geom/label/g_label.h> 41 42 static void 43 g_label_flashmap_taste(struct g_consumer *cp, char *label, size_t size) 44 { 45 struct g_flashmap *gfp; 46 struct g_slicer *gsp; 47 struct g_provider *pp; 48 49 g_topology_assert_not(); 50 51 pp = cp->provider; 52 label[0] = '\0'; 53 54 /* We taste only partitions handled by flashmap */ 55 if (strncmp(pp->geom->class->name, FLASHMAP_CLASS_NAME, 56 sizeof(FLASHMAP_CLASS_NAME)) != 0) 57 return; 58 59 gsp = (struct g_slicer *)pp->geom->softc; 60 gfp = (struct g_flashmap *)gsp->softc; 61 62 /* If it's handled by flashmap it should have a label, but be safe. */ 63 if (gfp->labels[pp->index] == NULL) 64 return; 65 66 strlcpy(label, gfp->labels[pp->index], size); 67 } 68 69 struct g_label_desc g_label_flashmap = { 70 .ld_taste = g_label_flashmap_taste, 71 .ld_dirprefix = "flash/", 72 .ld_enabled = 1 73 }; 74 75 G_LABEL_INIT(flashmap, g_label_flashmap, "Create device nodes for Flashmap labels"); 76