Some new features.

1 files changed, 280 insertions, 0 deletions

diff --git a/lib/format_text/text_label.c b/lib/format_text/text_label.c
new file mode 100644
index 00000000..b39d61ef
--- /dev/null
+++ b/lib/format_text/text_label.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright (C) 2002 Sistina Software (UK) Limited.
+ *
+ * This file is released under the LGPL.
+ */
+
+#include "lib.h"
+#include "format-text.h"
+#include "layout.h"
+#include "label.h"
+#include "xlate.h"
+
+#include <sys/stat.h>
+#include <fcntl.h>
+
+static int _can_handle(struct labeller *l, char *buf, uint64_t sector)
+{
+	struct label_header *lh = (struct label_header *) buf;
+
+	if (!strncmp(lh->type, LVM2_LABEL, sizeof(lh->type)))
+		return 1;
+
+	return 0;
+}
+
+static int _write(struct label *label, char *buf)
+{
+	struct label_header *lh = (struct label_header *) buf;
+	struct pv_header *pvhdr;
+	struct cache_info *info;
+	struct disk_locn *pvh_dlocn_xl;
+	struct list *mdash, *dash;
+	struct metadata_area *mda;
+	struct mda_context *mdac;
+	struct data_area_list *da;
+
+	/* FIXME Move to where label is created */
+	strncpy(label->type, LVM2_LABEL, sizeof(label->type));
+
+	strncpy(lh->type, label->type, sizeof(label->type));
+
+	pvhdr = (struct pv_header *) ((void *) buf + xlate32(lh->offset_xl));
+	info = (struct cache_info *) label->info;
+	pvhdr->device_size_xl = xlate64(info->device_size);
+	memcpy(pvhdr->pv_uuid, &info->dev->pvid, sizeof(struct id));
+
+	pvh_dlocn_xl = &pvhdr->disk_areas_xl[0];
+
+	/* List of data areas (holding PEs) */
+	list_iterate(dash, &info->das) {
+		da = list_item(dash, struct data_area_list);
+
+		pvh_dlocn_xl->offset = xlate64(da->disk_locn.offset);
+		pvh_dlocn_xl->size = xlate64(da->disk_locn.size);
+		pvh_dlocn_xl++;
+	}
+
+	/* NULL-termination */
+	pvh_dlocn_xl->offset = xlate64(0);
+	pvh_dlocn_xl->size = xlate64(0);
+	pvh_dlocn_xl++;
+
+	/* List of metadata area header locations */
+	list_iterate(mdash, &info->mdas) {
+		mda = list_item(mdash, struct metadata_area);
+		mdac = (struct mda_context *) mda->metadata_locn;
+
+		if (mdac->area.dev != info->dev)
+			continue;
+
+		pvh_dlocn_xl->offset = xlate64(mdac->area.start);
+		pvh_dlocn_xl->size = xlate64(mdac->area.size);
+		pvh_dlocn_xl++;
+	}
+
+	/* NULL-termination */
+	pvh_dlocn_xl->offset = xlate64(0);
+	pvh_dlocn_xl->size = xlate64(0);
+
+	return 1;
+}
+
+int add_da(struct format_type *fmt, struct pool *mem, struct list *das,
+	   uint64_t start, uint64_t size)
+{
+	struct data_area_list *dal;
+
+	if (!mem) {
+		if (!(dal = dbg_malloc(sizeof(*dal)))) {
+			log_error("struct data_area_list allocation failed");
+			return 0;
+		}
+	} else {
+		if (!(dal = pool_alloc(mem, sizeof(*dal)))) {
+			log_error("struct data_area_list allocation failed");
+			return 0;
+		}
+	}
+
+	dal->disk_locn.offset = start;
+	dal->disk_locn.size = size;
+
+	list_add(das, &dal->list);
+
+	return 1;
+}
+
+void del_das(struct list *das)
+{
+	struct list *dah, *tmp;
+	struct data_area_list *da;
+
+	list_iterate_safe(dah, tmp, das) {
+		da = list_item(dah, struct data_area_list);
+		list_del(&da->list);
+		dbg_free(da);
+	}
+}
+
+int add_mda(struct format_type *fmt, struct pool *mem, struct list *mdas,
+	    struct device *dev, uint64_t start, uint64_t size)
+{
+/* FIXME List size restricted by pv_header SECTOR_SIZE */
+	struct metadata_area *mdal;
+	struct mda_lists *mda_lists = (struct mda_lists *) fmt->private;
+	struct mda_context *mdac;
+
+	if (!mem) {
+		if (!(mdal = dbg_malloc(sizeof(struct metadata_area)))) {
+			log_error("struct mda_list allocation failed");
+			return 0;
+		}
+
+		if (!(mdac = dbg_malloc(sizeof(struct mda_context)))) {
+			log_error("struct mda_context allocation failed");
+			dbg_free(mdal);
+			return 0;
+		}
+	} else {
+		if (!(mdal = pool_alloc(mem, sizeof(struct metadata_area)))) {
+			log_error("struct mda_list allocation failed");
+			return 0;
+		}
+
+		if (!(mdac = pool_alloc(mem, sizeof(struct mda_context)))) {
+			log_error("struct mda_context allocation failed");
+			return 0;
+		}
+	}
+
+	mdal->ops = mda_lists->raw_ops;
+	mdal->metadata_locn = mdac;
+
+	mdac->area.dev = dev;
+	mdac->area.start = start;
+	mdac->area.size = size;
+	memset(&mdac->rlocn, 0, sizeof(mdac->rlocn));
+
+	list_add(mdas, &mdal->list);
+	return 1;
+}
+
+void del_mdas(struct list *mdas)
+{
+	struct list *mdah, *tmp;
+	struct metadata_area *mda;
+
+	list_iterate_safe(mdah, tmp, mdas) {
+		mda = list_item(mdah, struct metadata_area);
+		dbg_free(mda->metadata_locn);
+		list_del(&mda->list);
+		dbg_free(mda);
+	}
+}
+
+static int _initialise_label(struct labeller *l, struct label *label)
+{
+	strncpy(label->type, LVM2_LABEL, sizeof(label->type));
+
+	return 1;
+}
+
+static int _read(struct labeller *l, struct device *dev, char *buf,
+		 struct label **label)
+{
+	struct label_header *lh = (struct label_header *) buf;
+	struct pv_header *pvhdr;
+	struct cache_info *info;
+	struct disk_locn *dlocn_xl;
+	uint64_t offset;
+	struct list *mdah;
+	struct metadata_area *mda;
+	char vgnamebuf[NAME_LEN + 2];
+	struct mda_context *mdac;
+
+	pvhdr = (struct pv_header *) ((void *) buf + xlate32(lh->offset_xl));
+
+	if (!(info = cache_add(l, pvhdr->pv_uuid, dev, NULL, NULL)))
+		return 0;
+	*label = info->label;
+
+	info->device_size = xlate64(pvhdr->device_size_xl);
+
+	if (info->das.n)
+		del_das(&info->das);
+	list_init(&info->das);
+
+	if (info->mdas.n)
+		del_mdas(&info->mdas);
+	list_init(&info->mdas);
+
+	/* Data areas holding the PEs */
+	dlocn_xl = pvhdr->disk_areas_xl;
+	while ((offset = xlate64(dlocn_xl->offset))) {
+		add_da(info->fmt, NULL, &info->das, offset,
+		       xlate64(dlocn_xl->size));
+		dlocn_xl++;
+	}
+
+	/* Metadata area headers */
+	dlocn_xl++;
+	while ((offset = xlate64(dlocn_xl->offset))) {
+		add_mda(info->fmt, NULL, &info->mdas, dev, offset,
+			xlate64(dlocn_xl->size));
+		dlocn_xl++;
+	}
+
+	list_iterate(mdah, &info->mdas) {
+		mda = list_item(mdah, struct metadata_area);
+		mdac = (struct mda_context *) mda->metadata_locn;
+		if (vgname_from_mda(info->fmt, &mdac->area, vgnamebuf,
+				    sizeof(vgnamebuf))) {
+			cache_update_vgname(info, vgnamebuf);
+		}
+	}
+
+	info->status &= ~CACHE_INVALID;
+
+	return 1;
+}
+
+static void _destroy_label(struct labeller *l, struct label *label)
+{
+	struct cache_info *info = (struct cache_info *) label->info;
+
+	if (info->mdas.n)
+		del_mdas(&info->mdas);
+	if (info->das.n)
+		del_das(&info->das);
+}
+
+static void _destroy(struct labeller *l)
+{
+	dbg_free(l);
+}
+
+struct label_ops _text_ops = {
+	can_handle:_can_handle,
+	write:_write,
+	read:_read,
+	verify:_can_handle,
+	initialise_label:_initialise_label,
+	destroy_label:_destroy_label,
+	destroy:_destroy
+};
+
+struct labeller *text_labeller_create(struct format_type *fmt)
+{
+	struct labeller *l;
+
+	if (!(l = dbg_malloc(sizeof(*l)))) {
+		log_err("Couldn't allocate labeller object.");
+		return NULL;
+	}
+
+	l->ops = &_text_ops;
+	l->private = (void *) fmt;
+
+	return l;
+}