1249508Sivoras/*- 2249508Sivoras * Copyright (c) 2012 Ivan Voras <ivoras@FreeBSD.org> 3249508Sivoras * All rights reserved. 4249508Sivoras * 5249508Sivoras * Redistribution and use in source and binary forms, with or without 6249508Sivoras * modification, are permitted provided that the following conditions 7249508Sivoras * are met: 8249508Sivoras * 1. Redistributions of source code must retain the above copyright 9249508Sivoras * notice, this list of conditions and the following disclaimer. 10249508Sivoras * 2. Redistributions in binary form must reproduce the above copyright 11249508Sivoras * notice, this list of conditions and the following disclaimer in the 12249508Sivoras * documentation and/or other materials provided with the distribution. 13249508Sivoras * 14249508Sivoras * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15249508Sivoras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16249508Sivoras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17249508Sivoras * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18249508Sivoras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19249508Sivoras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20249508Sivoras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21249508Sivoras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22249508Sivoras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23249508Sivoras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24249508Sivoras * SUCH DAMAGE. 25249508Sivoras */ 26249508Sivoras 27249508Sivoras#include <sys/cdefs.h> 28249508Sivoras__FBSDID("$FreeBSD$"); 29249508Sivoras 30249508Sivoras#include <sys/param.h> 31249508Sivoras#include <sys/systm.h> 32249508Sivoras#include <sys/kernel.h> 33249508Sivoras#include <sys/malloc.h> 34249508Sivoras 35249508Sivoras#include <geom/geom.h> 36249508Sivoras#include <geom/geom_disk.h> 37249508Sivoras#include <geom/label/g_label.h> 38249508Sivoras#include <geom/multipath/g_multipath.h> 39249508Sivoras 40249508Sivoras 41249508Sivoras#define G_LABEL_DISK_IDENT_DIR "diskid" 42249508Sivoras 43249564Sivorasstatic char* classes_pass[] = { G_DISK_CLASS_NAME, G_MULTIPATH_CLASS_NAME, 44249564Sivoras NULL }; 45249508Sivoras 46249508Sivorasstatic void 47249508Sivorasg_label_disk_ident_taste(struct g_consumer *cp, char *label, size_t size) 48249508Sivoras{ 49249508Sivoras struct g_class *cls; 50249508Sivoras char ident[100]; 51249564Sivoras int ident_len, found, i; 52249508Sivoras 53249508Sivoras g_topology_assert_not(); 54249508Sivoras label[0] = '\0'; 55249508Sivoras 56249508Sivoras cls = cp->provider->geom->class; 57249508Sivoras 58249564Sivoras /* 59249564Sivoras * Get the GEOM::ident string, and construct a label in the format 60249564Sivoras * "CLASS_NAME-ident" 61249564Sivoras */ 62249564Sivoras ident_len = sizeof(ident); 63249508Sivoras if (g_io_getattr("GEOM::ident", cp, &ident_len, ident) == 0) { 64249508Sivoras if (ident_len == 0 || ident[0] == '\0') 65249508Sivoras return; 66249564Sivoras for (i = 0, found = 0; classes_pass[i] != NULL; i++) 67249564Sivoras if (strcmp(classes_pass[i], cls->name) == 0) { 68249508Sivoras found = 1; 69249564Sivoras break; 70249564Sivoras } 71249508Sivoras if (!found) 72249508Sivoras return; 73249564Sivoras /* 74249571Sivoras * We can safely ignore the result of snprintf(): the label 75249571Sivoras * will simply be truncated, which at most is only annoying. 76249564Sivoras */ 77249564Sivoras (void)snprintf(label, size, "%s-%s", cls->name, ident); 78249508Sivoras } 79249508Sivoras} 80249508Sivoras 81249508Sivorasstruct g_label_desc g_label_disk_ident = { 82249508Sivoras .ld_taste = g_label_disk_ident_taste, 83249508Sivoras .ld_dir = G_LABEL_DISK_IDENT_DIR, 84249508Sivoras .ld_enabled = 1 85249508Sivoras}; 86249508Sivoras 87249564SivorasG_LABEL_INIT(disk_ident, g_label_disk_ident, "Create device nodes for drives " 88249564Sivoras "which export a disk identification string"); 89