--- /dev/null
+/*
+ * Copyright (C) 2010 Red Hat, Inc. All rights reserved.
+ *
+ * This file is part of LVM2.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU Lesser General Public License v.2.1.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "lib.h"
+#include "metadata.h"
+#include "lvmcache.h"
+
+/*
+ * FIXME: Check for valid handle before dereferencing field or log error?
+ */
+#define pv_field(handle, field) ((handle)->field)
+
+/*
+ * Gets/Sets for external LVM library
+ */
+struct id pv_id(const struct physical_volume *pv)
+{
+ return pv_field(pv, id);
+}
+
+const struct format_type *pv_format_type(const struct physical_volume *pv)
+{
+ return pv_field(pv, fmt);
+}
+
+struct id pv_vgid(const struct physical_volume *pv)
+{
+ return pv_field(pv, vgid);
+}
+
+struct device *pv_dev(const struct physical_volume *pv)
+{
+ return pv_field(pv, dev);
+}
+
+const char *pv_vg_name(const struct physical_volume *pv)
+{
+ return pv_field(pv, vg_name);
+}
+
+const char *pv_dev_name(const struct physical_volume *pv)
+{
+ return dev_name(pv_dev(pv));
+}
+
+uint64_t pv_size(const struct physical_volume *pv)
+{
+ return pv_field(pv, size);
+}
+
+uint64_t pv_dev_size(const struct physical_volume *pv)
+{
+ uint64_t size;
+
+ if (!dev_get_size(pv->dev, &size))
+ size = 0;
+ return size;
+}
+
+uint64_t pv_size_field(const struct physical_volume *pv)
+{
+ uint64_t size;
+
+ if (!pv->pe_count)
+ size = pv->size;
+ else
+ size = (uint64_t) pv->pe_count * pv->pe_size;
+ return size;
+}
+
+uint64_t pv_free(const struct physical_volume *pv)
+{
+ uint64_t freespace;
+
+ if (!pv->pe_count)
+ freespace = pv->size;
+ else
+ freespace = (uint64_t)
+ (pv->pe_count - pv->pe_alloc_count) * pv->pe_size;
+ return freespace;
+}
+
+uint64_t pv_status(const struct physical_volume *pv)
+{
+ return pv_field(pv, status);
+}
+
+uint32_t pv_pe_size(const struct physical_volume *pv)
+{
+ return pv_field(pv, pe_size);
+}
+
+uint64_t pv_pe_start(const struct physical_volume *pv)
+{
+ return pv_field(pv, pe_start);
+}
+
+uint32_t pv_pe_count(const struct physical_volume *pv)
+{
+ return pv_field(pv, pe_count);
+}
+
+uint32_t pv_pe_alloc_count(const struct physical_volume *pv)
+{
+ return pv_field(pv, pe_alloc_count);
+}
+
+uint32_t pv_mda_count(const struct physical_volume *pv)
+{
+ struct lvmcache_info *info;
+
+ info = info_from_pvid((const char *)&pv->id.uuid, 0);
+ return info ? dm_list_size(&info->mdas) : UINT64_C(0);
+}
+
+uint32_t pv_mda_used_count(const struct physical_volume *pv)
+{
+ struct lvmcache_info *info;
+ struct metadata_area *mda;
+ uint32_t used_count=0;
+
+ info = info_from_pvid((const char *)&pv->id.uuid, 0);
+ if (!info)
+ return 0;
+ dm_list_iterate_items(mda, &info->mdas) {
+ if (!mda_is_ignored(mda))
+ used_count++;
+ }
+ return used_count;
+}
+
+/**
+ * is_orphan - Determine whether a pv is an orphan based on its vg_name
+ * @pv: handle to the physical volume
+ */
+int is_orphan(const struct physical_volume *pv)
+{
+ return is_orphan_vg(pv_field(pv, vg_name));
+}
+
+/**
+ * is_pv - Determine whether a pv is a real pv or dummy one
+ * @pv: handle to device
+ */
+int is_pv(const struct physical_volume *pv)
+{
+ return (pv_field(pv, vg_name) ? 1 : 0);
+}
+
+int is_missing_pv(const struct physical_volume *pv)
+{
+ return pv_field(pv, status) & MISSING_PV ? 1 : 0;
+}
+
+unsigned pv_mda_set_ignored(const struct physical_volume *pv, unsigned mda_ignored)
+{
+ struct lvmcache_info *info;
+ struct metadata_area *mda, *vg_mda, *tmda;
+ struct dm_list *vg_mdas_in_use, *vg_mdas_ignored;
+
+ if (!(info = info_from_pvid((const char *)&pv->id.uuid, 0)))
+ return_0;
+
+ if (is_orphan(pv)) {
+ dm_list_iterate_items(mda, &info->mdas)
+ mda_set_ignored(mda, mda_ignored);
+ return 1;
+ }
+
+ /*
+ * Do not allow disabling of the the last PV in a VG.
+ */
+ if (pv_mda_used_count(pv) == vg_mda_used_count(pv->vg)) {
+ log_error("Cannot disable all metadata areas in volume group %s.",
+ pv->vg->name);
+ return 0;
+ }
+
+ /*
+ * Non-orphan case is more complex.
+ * If the PV's mdas are ignored, and we wish to un-ignore,
+ * we clear the bit and move them from the ignored mda list to the
+ * in_use list, ensuring the new state will get written to disk
+ * in the vg_write() path.
+ * If the PV's mdas are not ignored, and we are setting
+ * them to ignored, we set the bit but leave them on the in_use
+ * list, ensuring the new state will get written to disk in the
+ * vg_write() path.
+ */
+ vg_mdas_in_use = &pv->vg->fid->metadata_areas_in_use;
+ vg_mdas_ignored = &pv->vg->fid->metadata_areas_ignored;
+
+ dm_list_iterate_items(mda, &info->mdas) {
+ if (mda_is_ignored(mda) && !mda_ignored)
+ /* Changing an ignored mda to one in_use requires moving it */
+ dm_list_iterate_items_safe(vg_mda, tmda, vg_mdas_ignored)
+ if (mda_locns_match(mda, vg_mda)) {
+ mda_set_ignored(vg_mda, mda_ignored);
+ dm_list_move(vg_mdas_in_use, &vg_mda->list);
+ }
+
+ dm_list_iterate_items_safe(vg_mda, tmda, vg_mdas_in_use)
+ if (mda_locns_match(mda, vg_mda))
+ /* Don't move mda: needs writing to disk. */
+ mda_set_ignored(vg_mda, mda_ignored);
+
+ mda_set_ignored(mda, mda_ignored);
+ }
+
+ return 1;
+}
+
--- /dev/null
+/*
+ * Copyright (C) 2010 Red Hat, Inc. All rights reserved.
+ *
+ * This file is part of LVM2.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU Lesser General Public License v.2.1.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _PV_H
+#define _PV_H
+
+struct id;
+struct device;
+struct format_type;
+struct volume_group;
+
+struct physical_volume {
+ struct id id;
+ struct device *dev;
+ const struct format_type *fmt;
+
+ /*
+ * vg_name and vgid are used before the parent VG struct exists.
+ * FIXME: Investigate removal/substitution with 'vg' fields.
+ */
+ const char *vg_name;
+ struct id vgid;
+
+ /*
+ * 'vg' is set and maintained when the PV belongs to a 'pvs'
+ * list in a parent VG struct.
+ */
+ struct volume_group *vg;
+
+ uint64_t status;
+ uint64_t size;
+
+ /* physical extents */
+ uint32_t pe_size;
+ uint64_t pe_start;
+ uint32_t pe_count;
+ uint32_t pe_alloc_count;
+ unsigned long pe_align;
+ unsigned long pe_align_offset;
+
+ struct dm_list segments; /* Ordered pv_segments covering complete PV */
+ struct dm_list tags;
+};
+
+struct device *pv_dev(const struct physical_volume *pv);
+const char *pv_vg_name(const struct physical_volume *pv);
+const char *pv_dev_name(const struct physical_volume *pv);
+uint64_t pv_size(const struct physical_volume *pv);
+uint64_t pv_size_field(const struct physical_volume *pv);
+uint64_t pv_dev_size(const struct physical_volume *pv);
+uint64_t pv_free(const struct physical_volume *pv);
+uint64_t pv_status(const struct physical_volume *pv);
+uint32_t pv_pe_size(const struct physical_volume *pv);
+uint64_t pv_pe_start(const struct physical_volume *pv);
+uint32_t pv_pe_count(const struct physical_volume *pv);
+uint32_t pv_pe_alloc_count(const struct physical_volume *pv);
+uint32_t pv_mda_count(const struct physical_volume *pv);
+uint32_t pv_mda_used_count(const struct physical_volume *pv);
+unsigned pv_mda_set_ignored(const struct physical_volume *pv, unsigned ignored);
+int is_orphan(const struct physical_volume *pv);
+int is_missing_pv(const struct physical_volume *pv);
+int is_pv(const struct physical_volume *pv);
+
+#endif
git://sourceware.org / lvm2.git / commitdiff