o LVM1 labeller.

diff --git a/lib/Makefile.in b/lib/Makefile.in
index 14039c89d8b3c48f5b8eb7e98c998920d665a234..8f47e083f357064c5a642ec3ad04a21d4a267b67 100644 (file)
--- 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 (file)
index 0000000..96c5c66
--- /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 (file)
index 0000000..210b46c
--- /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