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 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