volume_id: disable detection routines which are not setting label and uuid anyway

function                                             old     new   delta
static.warn                                            1       -      -1
static.drive_name_string                              14      12      -2
static.offsets                                         8       -      -8
static.sectors                                        10       -     -10
fs2                                                   60      48     -12
raid2                                                 16       -     -16
uuidcache_init                                       704     677     -27
raid1                                                 32       -     -32
volume_id_probe_all                                  198     158     -40
volume_id_probe_lvm1                                  58       -     -58
volume_id_probe_highpoint_37x_raid                    63       -     -63
volume_id_probe_hpfs                                  67       -     -67
volume_id_probe_minix                                 74       -     -74
volume_id_probe_lvm2                                  78       -     -78
volume_id_probe_silicon_medley_raid                   97       -     -97
volume_id_probe_via_raid                             101       -    -101
volume_id_probe_highpoint_45x_raid                   104       -    -104
volume_id_probe_nvidia_raid                          108       -    -108
volume_id_probe_lsi_mega_raid                        108       -    -108
volume_id_probe_intel_software_raid                  108       -    -108
volume_id_probe_ufs                                  126       -    -126
volume_id_probe_promise_fasttrack_raid               144       -    -144
------------------------------------------------------------------------------
(add/remove: 0/18 grow/shrink: 0/4 up/down: 0/-1384)        Total: -1384 bytes
   text    data     bss     dec     hex filename
 794244     662    7420  802326   c3e16 busybox_old
 792698     662    7420  800780   c380c busybox_unstripped

1 files changed, 87 insertions, 0 deletions

diff --git a/util-linux/volume_id/unused_lvm.c b/util-linux/volume_id/unused_lvm.c
new file mode 100644
index 0000000..caee04b
--- /dev/null
+++ b/util-linux/volume_id/unused_lvm.c
@@ -0,0 +1,87 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	This library is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Lesser General Public
+ *	License as published by the Free Software Foundation; either
+ *	version 2.1 of the License, or (at your option) any later version.
+ *
+ *	This library is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ *	Lesser General Public License for more details.
+ *
+ *	You should have received a copy of the GNU Lesser General Public
+ *	License along with this library; if not, write to the Free Software
+ *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "volume_id_internal.h"
+
+struct lvm1_super_block {
+	uint8_t	id[2];
+} __attribute__((packed));
+
+struct lvm2_super_block {
+	uint8_t		id[8];
+	uint64_t	sector_xl;
+	uint32_t	crc_xl;
+	uint32_t	offset_xl;
+	uint8_t		type[8];
+} __attribute__((packed));
+
+#define LVM1_SB_OFF			0x400
+
+int volume_id_probe_lvm1(struct volume_id *id, uint64_t off)
+{
+	struct lvm1_super_block *lvm;
+
+	dbg("probing at offset 0x%llx", (unsigned long long) off);
+
+	lvm = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800);
+	if (lvm == NULL)
+		return -1;
+
+	if (lvm->id[0] != 'H' || lvm->id[1] != 'M')
+		return -1;
+
+//	volume_id_set_usage(id, VOLUME_ID_RAID);
+//	id->type = "LVM1_member";
+
+	return 0;
+}
+
+#define LVM2_LABEL_ID			"LABELONE"
+#define LVM2LABEL_SCAN_SECTORS		4
+
+int volume_id_probe_lvm2(struct volume_id *id, uint64_t off)
+{
+	const uint8_t *buf;
+	unsigned soff;
+	struct lvm2_super_block *lvm;
+
+	dbg("probing at offset 0x%llx", (unsigned long long) off);
+
+	buf = volume_id_get_buffer(id, off, LVM2LABEL_SCAN_SECTORS * 0x200);
+	if (buf == NULL)
+		return -1;
+
+
+	for (soff = 0; soff < LVM2LABEL_SCAN_SECTORS * 0x200; soff += 0x200) {
+		lvm = (struct lvm2_super_block *) &buf[soff];
+
+		if (memcmp(lvm->id, LVM2_LABEL_ID, 8) == 0)
+			goto found;
+	}
+
+	return -1;
+
+ found:
+//	memcpy(id->type_version, lvm->type, 8);
+//	volume_id_set_usage(id, VOLUME_ID_RAID);
+//	id->type = "LVM2_member";
+
+	return 0;
+}