freebsd-dev/sys/geom/label/g_label_gpt.c
Pedro F. Giffuni 3728855a0f sys/geom: adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 15:17:37 +00:00

173 lines
5.2 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2008 Marius Nuennerich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/kobj.h>
#include <sys/gpt.h>
#include <sys/sbuf.h>
#include <geom/geom.h>
#include <geom/label/g_label.h>
#include <geom/part/g_part.h>
#define PART_CLASS_NAME "PART"
#define SCHEME_NAME "GPT"
#define G_LABEL_GPT_VOLUME_DIR "gpt"
#define G_LABEL_GPT_ID_DIR "gptid"
/* XXX: Also defined in geom/part/g_part_gpt.c */
struct g_part_gpt_entry {
struct g_part_entry base;
struct gpt_ent ent;
};
/* XXX: Shamelessly stolen from g_part_gpt.c */
static void
sbuf_nprintf_utf16(struct sbuf *sb, uint16_t *str, size_t len)
{
u_int bo;
uint32_t ch;
uint16_t c;
bo = LITTLE_ENDIAN; /* GPT is little-endian */
while (len > 0 && *str != 0) {
ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str);
str++, len--;
if ((ch & 0xf800) == 0xd800) {
if (len > 0) {
c = (bo == BIG_ENDIAN) ? be16toh(*str)
: le16toh(*str);
str++, len--;
} else
c = 0xfffd;
if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) {
ch = ((ch & 0x3ff) << 10) + (c & 0x3ff);
ch += 0x10000;
} else
ch = 0xfffd;
} else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */
bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN;
continue;
} else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */
continue;
/* Write the Unicode character in UTF-8 */
if (ch < 0x80)
sbuf_printf(sb, "%c", ch);
else if (ch < 0x800)
sbuf_printf(sb, "%c%c", 0xc0 | (ch >> 6),
0x80 | (ch & 0x3f));
else if (ch < 0x10000)
sbuf_printf(sb, "%c%c%c", 0xe0 | (ch >> 12),
0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
else if (ch < 0x200000)
sbuf_printf(sb, "%c%c%c%c", 0xf0 | (ch >> 18),
0x80 | ((ch >> 12) & 0x3f),
0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
}
}
static void
g_label_gpt_taste(struct g_consumer *cp, char *label, size_t size)
{
struct g_provider *pp;
struct g_part_table *tp;
struct g_part_gpt_entry *part_gpt_entry;
struct sbuf *lbl;
g_topology_assert_not();
pp = cp->provider;
tp = (struct g_part_table *)pp->geom->softc;
label[0] = '\0';
/* We taste only partitions handled by GPART */
if (strncmp(pp->geom->class->name, PART_CLASS_NAME, sizeof(PART_CLASS_NAME)))
return;
/* and only GPT */
if (strncmp(tp->gpt_scheme->name, SCHEME_NAME, sizeof(SCHEME_NAME)))
return;
part_gpt_entry = (struct g_part_gpt_entry *)pp->private;
/*
* Create sbuf with biggest possible size.
* We need max. 4 bytes for every 2-byte utf16 char.
*/
lbl = sbuf_new(NULL, NULL, sizeof(part_gpt_entry->ent.ent_name) << 1, SBUF_FIXEDLEN);
/* Size is the number of characters, not bytes */
sbuf_nprintf_utf16(lbl, part_gpt_entry->ent.ent_name, sizeof(part_gpt_entry->ent.ent_name) >> 1);
sbuf_finish(lbl);
strlcpy(label, sbuf_data(lbl), size);
sbuf_delete(lbl);
}
static void
g_label_gpt_uuid_taste(struct g_consumer *cp, char *label, size_t size)
{
struct g_provider *pp;
struct g_part_table *tp;
struct g_part_gpt_entry *part_gpt_entry;
g_topology_assert_not();
pp = cp->provider;
tp = (struct g_part_table *)pp->geom->softc;
label[0] = '\0';
/* We taste only partitions handled by GPART */
if (strncmp(pp->geom->class->name, PART_CLASS_NAME, sizeof(PART_CLASS_NAME)))
return;
/* and only GPT */
if (strncmp(tp->gpt_scheme->name, SCHEME_NAME, sizeof(SCHEME_NAME)))
return;
part_gpt_entry = (struct g_part_gpt_entry *)pp->private;
snprintf_uuid(label, size, &part_gpt_entry->ent.ent_uuid);
}
struct g_label_desc g_label_gpt = {
.ld_taste = g_label_gpt_taste,
.ld_dir = G_LABEL_GPT_VOLUME_DIR,
.ld_enabled = 1
};
struct g_label_desc g_label_gpt_uuid = {
.ld_taste = g_label_gpt_uuid_taste,
.ld_dir = G_LABEL_GPT_ID_DIR,
.ld_enabled = 1
};
G_LABEL_INIT(gpt, g_label_gpt, "Create device nodes for GPT labels");
G_LABEL_INIT(gptid, g_label_gpt_uuid, "Create device nodes for GPT UUIDs");