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[lvm-devel] LVM2/lib/metadata pv.c pv.h



CVSROOT:	/cvs/lvm2
Module name:	LVM2
Changes by:	wysochanski sourceware org	2010-09-30 13:15:42

Added files:
	lib/metadata   : pv.c pv.h 

Log message:
	Add lib/metadata/pv.[ch] new files.
	
	Apparently git cvsexportcommit does not properly add new files
	from a git commit.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/metadata/pv.c.diff?cvsroot=lvm2&r1=NONE&r2=1.1
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/metadata/pv.h.diff?cvsroot=lvm2&r1=NONE&r2=1.1

/cvs/lvm2/LVM2/lib/metadata/pv.c,v  -->  standard output
revision 1.1
--- LVM2/lib/metadata/pv.c
+++ -	2010-09-30 13:15:43.764416000 +0000
@@ -0,0 +1,223 @@
+/*
+ * 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;
+}
+
/cvs/lvm2/LVM2/lib/metadata/pv.h,v  -->  standard output
revision 1.1
--- LVM2/lib/metadata/pv.h
+++ -	2010-09-30 13:15:44.115676000 +0000
@@ -0,0 +1,74 @@
+/*
+ * 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


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