From 9056f65b0ca62ad227996de748782e2d6b5d308c Mon Sep 17 00:00:00 2001
From: Joe Thornber <thornber@redhat.com>
Date: Mon, 14 Jan 2002 10:00:56 +0000
Subject: [PATCH] o  LVM1 labeller.

---
 lib/Makefile.in          |   1 +
 lib/format1/lvm1_label.c | 124 +++++++++++++++++++++++++++++++++++++++
 lib/format1/lvm1_label.h |  12 ++++
 3 files changed, 137 insertions(+)
 create mode 100644 lib/format1/lvm1_label.c
 create mode 100644 lib/format1/lvm1_label.h

diff --git a/lib/Makefile.in b/lib/Makefile.in
index 14039c89d..8f47e083f 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -28,6 +28,7 @@ SOURCES=\
 	format1/import-export.c \
 	format1/import-extents.c \
 	format1/layout.c \
+	format1/lvm1_label.c \
 	format1/vg_number.c \
 	format_text/archive.c \
 	format_text/export.c \
diff --git a/lib/format1/lvm1_label.c b/lib/format1/lvm1_label.c
new file mode 100644
index 000000000..96c5c66ea
--- /dev/null
+++ b/lib/format1/lvm1_label.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2002 Sistina Software (UK) Limited.
+ *
+ * This file is released under the LGPL.
+ */
+
+#include "lvm1_label.h"
+#include "dbg_malloc.h"
+#include "pool.h"
+#include "disk-rep.h"
+#include "log.h"
+#include "label.h"
+
+static void _not_supported(const char *op)
+{
+	log_err("The '%s' operation is not supported for the lvm1 labeller.",
+		op);
+}
+
+static int _can_handle(struct labeller *l, struct device *dev)
+{
+	struct pool *mem = (struct pool *) l->private;
+	struct disk_list *dl;
+
+	dl = read_disk(dev, mem, NULL);
+	pool_empty(mem);
+	return dl ? 1 : 0;
+}
+
+static int _write(struct labeller *l,
+		  struct device *dev, struct label *label)
+{
+	_not_supported("write");
+	return 0;
+}
+
+static int _remove(struct labeller *l, struct device *dev)
+{
+	_not_supported("remove");
+	return 0;
+}
+
+static struct label *_to_label(struct disk_list *dl)
+{
+	struct label *l;
+
+	if (!(l = dbg_malloc(sizeof(*l)))) {
+		log_err("Couldn't allocate label.");
+		return NULL;
+	}
+
+	memcpy(&l->id, &dl->pvd.pv_uuid, sizeof(l->id));
+	strcpy(l->volume_type, "lvm1");
+	l->version[0] = 1;
+	l->version[0] = 0;
+	l->version[0] = 0;
+
+	l->extra_len = 0;
+	l->extra_info = NULL;
+	return l;
+}
+
+static int _read(struct labeller *l,
+		 struct device *dev, struct label **label)
+{
+	struct pool *mem = (struct pool *) l->private;
+	struct disk_list *dl;
+	int r = 0;
+
+	if (!(dl = read_disk(dev, mem, NULL))) {
+		log_err("Couldn't read lvm1 label.");
+		return 0;
+	}
+
+	/*
+	 * Convert the disk_list into a label structure.
+	 */
+	if ((*label = _to_label(dl)))
+		r = 1;
+	else
+		stack;
+
+	pool_empty(mem);
+	return r;
+}
+
+static void _destroy(struct labeller *l)
+{
+	struct pool *mem = (struct pool *) l->private;
+	pool_destroy(mem);
+	dbg_free(l->private);
+}
+
+
+struct label_ops _lvm1_ops = {
+	can_handle: _can_handle,
+	write: _write,
+	remove: _remove,
+	read: _read,
+	verify: _can_handle,
+	destroy: _destroy
+};
+
+struct labeller *lvm1_labeller_create(void)
+{
+	struct labeller *l;
+	struct pool *mem;
+
+	if (!(l = dbg_malloc(sizeof(*l)))) {
+		log_err("Couldn't allocate labeller object.");
+		return NULL;
+	}
+
+	if (!(mem = pool_create(256))) {
+		log_err("Couldn't create pool object for labeller.");
+		dbg_free(l);
+		return NULL;
+	}
+
+	l->ops = &_lvm1_ops;
+	l->private = mem;
+
+	return l;
+}
diff --git a/lib/format1/lvm1_label.h b/lib/format1/lvm1_label.h
new file mode 100644
index 000000000..210b46c2f
--- /dev/null
+++ b/lib/format1/lvm1_label.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) 2002 Sistina Software (UK) Limited.
+ *
+ * This file is released under the LGPL.
+ */
+
+#ifndef _LVM_LVM1_LABEL_H
+#define _LVM_LVM1_LABEL_H
+
+struct labeller *lvm1_labeller_create(void);
+
+#endif