2 * Copyright (c) 2008 Marius Nuennerich
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/malloc.h>
38 #include <geom/geom.h>
39 #include <geom/label/g_label.h>
40 #include <geom/part/g_part.h>
42 #define PART_CLASS_NAME "PART"
43 #define SCHEME_NAME "GPT"
45 #define G_LABEL_GPT_VOLUME_DIR "gpt"
46 #define G_LABEL_GPT_ID_DIR "gptid"
48 /* XXX: Also defined in geom/part/g_part_gpt.c */
49 struct g_part_gpt_entry {
50 struct g_part_entry base;
54 /* XXX: Shamelessly stolen from g_part_gpt.c */
56 sbuf_nprintf_utf16(struct sbuf *sb, uint16_t *str, size_t len)
62 bo = LITTLE_ENDIAN; /* GPT is little-endian */
63 while (len > 0 && *str != 0) {
64 ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str);
66 if ((ch & 0xf800) == 0xd800) {
68 c = (bo == BIG_ENDIAN) ? be16toh(*str)
73 if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) {
74 ch = ((ch & 0x3ff) << 10) + (c & 0x3ff);
78 } else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */
79 bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN;
81 } else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */
84 /* Write the Unicode character in UTF-8 */
86 sbuf_printf(sb, "%c", ch);
88 sbuf_printf(sb, "%c%c", 0xc0 | (ch >> 6),
90 else if (ch < 0x10000)
91 sbuf_printf(sb, "%c%c%c", 0xe0 | (ch >> 12),
92 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
93 else if (ch < 0x200000)
94 sbuf_printf(sb, "%c%c%c%c", 0xf0 | (ch >> 18),
95 0x80 | ((ch >> 12) & 0x3f),
96 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
101 g_label_gpt_taste(struct g_consumer *cp, char *label, size_t size)
103 struct g_provider *pp;
104 struct g_part_table *tp;
105 struct g_part_gpt_entry *part_gpt_entry;
108 g_topology_assert_not();
110 tp = (struct g_part_table *)pp->geom->softc;
113 /* We taste only partitions handled by GPART */
114 if (strncmp(pp->geom->class->name, PART_CLASS_NAME, sizeof(PART_CLASS_NAME)))
117 if (strncmp(tp->gpt_scheme->name, SCHEME_NAME, sizeof(SCHEME_NAME)))
120 part_gpt_entry = (struct g_part_gpt_entry *)pp->private;
123 * Create sbuf with biggest possible size.
124 * We need max. 4 bytes for every 2-byte utf16 char.
126 lbl = sbuf_new(NULL, NULL, sizeof(part_gpt_entry->ent.ent_name) << 1, SBUF_FIXEDLEN);
127 /* Size is the number of characters, not bytes */
128 sbuf_nprintf_utf16(lbl, part_gpt_entry->ent.ent_name, sizeof(part_gpt_entry->ent.ent_name) >> 1);
130 strlcpy(label, sbuf_data(lbl), size);
135 g_label_gpt_uuid_taste(struct g_consumer *cp, char *label, size_t size)
137 struct g_provider *pp;
138 struct g_part_table *tp;
139 struct g_part_gpt_entry *part_gpt_entry;
141 g_topology_assert_not();
143 tp = (struct g_part_table *)pp->geom->softc;
146 /* We taste only partitions handled by GPART */
147 if (strncmp(pp->geom->class->name, PART_CLASS_NAME, sizeof(PART_CLASS_NAME)))
150 if (strncmp(tp->gpt_scheme->name, SCHEME_NAME, sizeof(SCHEME_NAME)))
153 part_gpt_entry = (struct g_part_gpt_entry *)pp->private;
154 snprintf_uuid(label, size, &part_gpt_entry->ent.ent_uuid);
157 struct g_label_desc g_label_gpt = {
158 .ld_taste = g_label_gpt_taste,
159 .ld_dir = G_LABEL_GPT_VOLUME_DIR,
163 struct g_label_desc g_label_gpt_uuid = {
164 .ld_taste = g_label_gpt_uuid_taste,
165 .ld_dir = G_LABEL_GPT_ID_DIR,
169 G_LABEL_INIT(gpt, g_label_gpt, "Create device nodes for GPT labels");
170 G_LABEL_INIT(gptid, g_label_gpt_uuid, "Create device nodes for GPT UUIDs");