1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 Ivan Voras <ivoras@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/malloc.h> 36 37 #include <geom/geom.h> 38 #include <geom/geom_disk.h> 39 #include <geom/label/g_label.h> 40 #include <geom/multipath/g_multipath.h> 41 42 static char* classes_pass[] = { G_DISK_CLASS_NAME, G_MULTIPATH_CLASS_NAME, 43 NULL }; 44 45 static void 46 g_label_disk_ident_taste(struct g_consumer *cp, char *label, size_t size) 47 { 48 struct g_class *cls; 49 char ident[DISK_IDENT_SIZE]; 50 int ident_len, found, i; 51 52 g_topology_assert_not(); 53 label[0] = '\0'; 54 55 cls = cp->provider->geom->class; 56 57 /* 58 * Get the GEOM::ident string, and construct a label in the format 59 * "CLASS_NAME-ident" 60 */ 61 ident_len = sizeof(ident); 62 if (g_io_getattr("GEOM::ident", cp, &ident_len, ident) == 0) { 63 if (ident_len == 0 || ident[0] == '\0') 64 return; 65 for (i = 0, found = 0; classes_pass[i] != NULL; i++) 66 if (strcmp(classes_pass[i], cls->name) == 0) { 67 found = 1; 68 break; 69 } 70 if (!found) 71 return; 72 /* 73 * We can safely ignore the result of snprintf(): the label 74 * will simply be truncated, which at most is only annoying. 75 */ 76 (void)snprintf(label, size, "%s-%s", cls->name, ident); 77 } 78 } 79 80 struct g_label_desc g_label_disk_ident = { 81 .ld_taste = g_label_disk_ident_taste, 82 .ld_dirprefix = "diskid/", 83 .ld_enabled = 1 84 }; 85 86 G_LABEL_INIT(disk_ident, g_label_disk_ident, "Create device nodes for drives " 87 "which export a disk identification string"); 88