support for mount by label (not yet tested)
Also adds findfs applet. Closes bug 1143.
diff --git a/util-linux/volume_id/lvm.c b/util-linux/volume_id/lvm.c
new file mode 100644
index 0000000..baa8456
--- /dev/null
+++ b/util-linux/volume_id/lvm.c
@@ -0,0 +1,91 @@
+/*
+ * 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
+#define LVM1_MAGIC "HM"
+
+int volume_id_probe_lvm1(struct volume_id *id, uint64_t off)
+{
+ const uint8_t *buf;
+ struct lvm1_super_block *lvm;
+
+ dbg("probing at offset 0x%llx", (unsigned long long) off);
+
+ buf = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800);
+ if (buf == NULL)
+ return -1;
+
+ lvm = (struct lvm1_super_block *) buf;
+
+ if (memcmp(lvm->id, LVM1_MAGIC, 2) != 0)
+ 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;
+}