--- /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 "activate.h"
+
+uint32_t vg_seqno(const struct volume_group *vg)
+{
+ return vg->seqno;
+}
+
+uint64_t vg_status(const struct volume_group *vg)
+{
+ return vg->status;
+}
+
+uint64_t vg_size(const struct volume_group *vg)
+{
+ return (uint64_t) vg->extent_count * vg->extent_size;
+}
+
+uint64_t vg_free(const struct volume_group *vg)
+{
+ return (uint64_t) vg->free_count * vg->extent_size;
+}
+
+uint64_t vg_extent_size(const struct volume_group *vg)
+{
+ return (uint64_t) vg->extent_size;
+}
+
+uint64_t vg_extent_count(const struct volume_group *vg)
+{
+ return (uint64_t) vg->extent_count;
+}
+
+uint64_t vg_free_count(const struct volume_group *vg)
+{
+ return (uint64_t) vg->free_count;
+}
+
+uint64_t vg_pv_count(const struct volume_group *vg)
+{
+ return (uint64_t) vg->pv_count;
+}
+
+uint64_t vg_max_pv(const struct volume_group *vg)
+{
+ return (uint64_t) vg->max_pv;
+}
+
+uint64_t vg_max_lv(const struct volume_group *vg)
+{
+ return (uint64_t) vg->max_lv;
+}
+
+unsigned snapshot_count(const struct volume_group *vg)
+{
+ struct lv_list *lvl;
+ unsigned num_snapshots = 0;
+
+ dm_list_iterate_items(lvl, &vg->lvs)
+ if (lv_is_cow(lvl->lv))
+ num_snapshots++;
+
+ return num_snapshots;
+}
+
+unsigned vg_visible_lvs(const struct volume_group *vg)
+{
+ struct lv_list *lvl;
+ unsigned lv_count = 0;
+
+ dm_list_iterate_items(lvl, &vg->lvs) {
+ if (lv_is_visible(lvl->lv))
+ lv_count++;
+ }
+
+ return lv_count;
+}
+
+uint32_t vg_mda_count(const struct volume_group *vg)
+{
+ return dm_list_size(&vg->fid->metadata_areas_in_use) +
+ dm_list_size(&vg->fid->metadata_areas_ignored);
+}
+
+uint32_t vg_mda_used_count(const struct volume_group *vg)
+{
+ uint32_t used_count = 0;
+ struct metadata_area *mda;
+
+ /*
+ * Ignored mdas could be on either list - the reason being the state
+ * may have changed from ignored to un-ignored and we need to write
+ * the state to disk.
+ */
+ dm_list_iterate_items(mda, &vg->fid->metadata_areas_in_use)
+ if (!mda_is_ignored(mda))
+ used_count++;
+
+ return used_count;
+}
+
+uint32_t vg_mda_copies(const struct volume_group *vg)
+{
+ return vg->mda_copies;
+}
+
+uint64_t vg_mda_size(const struct volume_group *vg)
+{
+ return find_min_mda_size(&vg->fid->metadata_areas_in_use);
+}
+
+uint64_t vg_mda_free(const struct volume_group *vg)
+{
+ uint64_t freespace = UINT64_MAX, mda_free;
+ struct metadata_area *mda;
+
+ dm_list_iterate_items(mda, &vg->fid->metadata_areas_in_use) {
+ if (!mda->ops->mda_free_sectors)
+ continue;
+ mda_free = mda->ops->mda_free_sectors(mda);
+ if (mda_free < freespace)
+ freespace = mda_free;
+ }
+
+ if (freespace == UINT64_MAX)
+ freespace = UINT64_C(0);
+ return freespace;
+}
+
+int vg_set_mda_copies(struct volume_group *vg, uint32_t mda_copies)
+{
+ vg->mda_copies = mda_copies;
+
+ /* FIXME Use log_verbose when this is due to specific cmdline request. */
+ log_debug("Setting mda_copies to %"PRIu32" for VG %s",
+ mda_copies, vg->name);
+
+ return 1;
+}
+
+static int _recalc_extents(uint32_t *extents, const char *desc1,
+ const char *desc2, uint32_t old_size,
+ uint32_t new_size)
+{
+ uint64_t size = (uint64_t) old_size * (*extents);
+
+ if (size % new_size) {
+ log_error("New size %" PRIu64 " for %s%s not an exact number "
+ "of new extents.", size, desc1, desc2);
+ return 0;
+ }
+
+ size /= new_size;
+
+ if (size > UINT32_MAX) {
+ log_error("New extent count %" PRIu64 " for %s%s exceeds "
+ "32 bits.", size, desc1, desc2);
+ return 0;
+ }
+
+ *extents = (uint32_t) size;
+
+ return 1;
+}
+
+int vg_set_extent_size(struct volume_group *vg, uint32_t new_size)
+{
+ uint32_t old_size = vg->extent_size;
+ struct pv_list *pvl;
+ struct lv_list *lvl;
+ struct physical_volume *pv;
+ struct logical_volume *lv;
+ struct lv_segment *seg;
+ struct pv_segment *pvseg;
+ uint32_t s;
+
+ if (!vg_is_resizeable(vg)) {
+ log_error("Volume group \"%s\" must be resizeable "
+ "to change PE size", vg->name);
+ return 0;
+ }
+
+ if (!new_size) {
+ log_error("Physical extent size may not be zero");
+ return 0;
+ }
+
+ if (new_size == vg->extent_size)
+ return 1;
+
+ if (new_size & (new_size - 1)) {
+ log_error("Physical extent size must be a power of 2.");
+ return 0;
+ }
+
+ if (new_size > vg->extent_size) {
+ if ((uint64_t) vg_size(vg) % new_size) {
+ /* FIXME Adjust used PV sizes instead */
+ log_error("New extent size is not a perfect fit");
+ return 0;
+ }
+ }
+
+ vg->extent_size = new_size;
+
+ if (vg->fid->fmt->ops->vg_setup &&
+ !vg->fid->fmt->ops->vg_setup(vg->fid, vg))
+ return_0;
+
+ if (!_recalc_extents(&vg->extent_count, vg->name, "", old_size,
+ new_size))
+ return_0;
+
+ if (!_recalc_extents(&vg->free_count, vg->name, " free space",
+ old_size, new_size))
+ return_0;
+
+ /* foreach PV */
+ dm_list_iterate_items(pvl, &vg->pvs) {
+ pv = pvl->pv;
+
+ pv->pe_size = new_size;
+ if (!_recalc_extents(&pv->pe_count, pv_dev_name(pv), "",
+ old_size, new_size))
+ return_0;
+
+ if (!_recalc_extents(&pv->pe_alloc_count, pv_dev_name(pv),
+ " allocated space", old_size, new_size))
+ return_0;
+
+ /* foreach free PV Segment */
+ dm_list_iterate_items(pvseg, &pv->segments) {
+ if (pvseg_is_allocated(pvseg))
+ continue;
+
+ if (!_recalc_extents(&pvseg->pe, pv_dev_name(pv),
+ " PV segment start", old_size,
+ new_size))
+ return_0;
+ if (!_recalc_extents(&pvseg->len, pv_dev_name(pv),
+ " PV segment length", old_size,
+ new_size))
+ return_0;
+ }
+ }
+
+ /* foreach LV */
+ dm_list_iterate_items(lvl, &vg->lvs) {
+ lv = lvl->lv;
+
+ if (!_recalc_extents(&lv->le_count, lv->name, "", old_size,
+ new_size))
+ return_0;
+
+ dm_list_iterate_items(seg, &lv->segments) {
+ if (!_recalc_extents(&seg->le, lv->name,
+ " segment start", old_size,
+ new_size))
+ return_0;
+
+ if (!_recalc_extents(&seg->len, lv->name,
+ " segment length", old_size,
+ new_size))
+ return_0;
+
+ if (!_recalc_extents(&seg->area_len, lv->name,
+ " area length", old_size,
+ new_size))
+ return_0;
+
+ if (!_recalc_extents(&seg->extents_copied, lv->name,
+ " extents moved", old_size,
+ new_size))
+ return_0;
+
+ /* foreach area */
+ for (s = 0; s < seg->area_count; s++) {
+ switch (seg_type(seg, s)) {
+ case AREA_PV:
+ if (!_recalc_extents
+ (&seg_pe(seg, s),
+ lv->name,
+ " pvseg start", old_size,
+ new_size))
+ return_0;
+ if (!_recalc_extents
+ (&seg_pvseg(seg, s)->len,
+ lv->name,
+ " pvseg length", old_size,
+ new_size))
+ return_0;
+ break;
+ case AREA_LV:
+ if (!_recalc_extents
+ (&seg_le(seg, s), lv->name,
+ " area start", old_size,
+ new_size))
+ return_0;
+ break;
+ case AREA_UNASSIGNED:
+ log_error("Unassigned area %u found in "
+ "segment", s);
+ return 0;
+ }
+ }
+ }
+
+ }
+
+ return 1;
+}
+
+int vg_set_max_lv(struct volume_group *vg, uint32_t max_lv)
+{
+ if (!vg_is_resizeable(vg)) {
+ log_error("Volume group \"%s\" must be resizeable "
+ "to change MaxLogicalVolume", vg->name);
+ return 0;
+ }
+
+ if (!(vg->fid->fmt->features & FMT_UNLIMITED_VOLS)) {
+ if (!max_lv)
+ max_lv = 255;
+ else if (max_lv > 255) {
+ log_error("MaxLogicalVolume limit is 255");
+ return 0;
+ }
+ }
+
+ if (max_lv && max_lv < vg_visible_lvs(vg)) {
+ log_error("MaxLogicalVolume is less than the current number "
+ "%d of LVs for %s", vg_visible_lvs(vg),
+ vg->name);
+ return 0;
+ }
+ vg->max_lv = max_lv;
+
+ return 1;
+}
+
+int vg_set_max_pv(struct volume_group *vg, uint32_t max_pv)
+{
+ if (!vg_is_resizeable(vg)) {
+ log_error("Volume group \"%s\" must be resizeable "
+ "to change MaxPhysicalVolumes", vg->name);
+ return 0;
+ }
+
+ if (!(vg->fid->fmt->features & FMT_UNLIMITED_VOLS)) {
+ if (!max_pv)
+ max_pv = 255;
+ else if (max_pv > 255) {
+ log_error("MaxPhysicalVolume limit is 255");
+ return 0;
+ }
+ }
+
+ if (max_pv && max_pv < vg->pv_count) {
+ log_error("MaxPhysicalVolumes is less than the current number "
+ "%d of PVs for \"%s\"", vg->pv_count,
+ vg->name);
+ return 0;
+ }
+ vg->max_pv = max_pv;
+ return 1;
+}
+
+int vg_set_alloc_policy(struct volume_group *vg, alloc_policy_t alloc)
+{
+ if (alloc == ALLOC_INHERIT) {
+ log_error("Volume Group allocation policy cannot inherit "
+ "from anything");
+ return 0;
+ }
+
+ if (alloc == vg->alloc)
+ return 1;
+
+ vg->alloc = alloc;
+ return 1;
+}
+
+int vg_set_clustered(struct volume_group *vg, int clustered)
+{
+ struct lv_list *lvl;
+
+ /*
+ * We do not currently support switching the cluster attribute
+ * on active mirrors or snapshots.
+ */
+ dm_list_iterate_items(lvl, &vg->lvs) {
+ if (lv_is_mirrored(lvl->lv) && lv_is_active(lvl->lv)) {
+ log_error("Mirror logical volumes must be inactive "
+ "when changing the cluster attribute.");
+ return 0;
+ }
+
+ if (clustered) {
+ if (lv_is_origin(lvl->lv) || lv_is_cow(lvl->lv)) {
+ log_error("Volume group %s contains snapshots "
+ "that are not yet supported.",
+ vg->name);
+ return 0;
+ }
+ }
+
+ if ((lv_is_origin(lvl->lv) || lv_is_cow(lvl->lv)) &&
+ lv_is_active(lvl->lv)) {
+ log_error("Snapshot logical volumes must be inactive "
+ "when changing the cluster attribute.");
+ return 0;
+ }
+ }
+
+ if (clustered)
+ vg->status |= CLUSTERED;
+ else
+ vg->status &= ~CLUSTERED;
+ 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 _VG_H
+#define _VG_H
+
+struct cmd_context;
+struct dm_pool;
+struct format_instance;
+struct dm_list;
+struct id;
+
+typedef enum {
+ ALLOC_INVALID,
+ ALLOC_CONTIGUOUS,
+ ALLOC_CLING,
+ ALLOC_NORMAL,
+ ALLOC_ANYWHERE,
+ ALLOC_INHERIT
+} alloc_policy_t;
+
+struct volume_group {
+ struct cmd_context *cmd;
+ struct dm_pool *vgmem;
+ struct format_instance *fid;
+ struct dm_list *cmd_vgs;/* List of wanted/locked and opened VGs */
+ uint32_t cmd_missing_vgs;/* Flag marks missing VG */
+ uint32_t seqno; /* Metadata sequence number */
+
+ alloc_policy_t alloc;
+ uint64_t status;
+
+ struct id id;
+ char *name;
+ char *old_name; /* Set during vgrename and vgcfgrestore */
+ char *system_id;
+
+ uint32_t extent_size;
+ uint32_t extent_count;
+ uint32_t free_count;
+
+ uint32_t max_lv;
+ uint32_t max_pv;
+
+ /* physical volumes */
+ uint32_t pv_count;
+ struct dm_list pvs;
+
+ /*
+ * logical volumes
+ * The following relationship should always hold:
+ * dm_list_size(lvs) = user visible lv_count + snapshot_count + other invisible LVs
+ *
+ * Snapshots consist of 2 instances of "struct logical_volume":
+ * - cow (lv_name is visible to the user)
+ * - snapshot (lv_name is 'snapshotN')
+ *
+ * Mirrors consist of multiple instances of "struct logical_volume":
+ * - one for the mirror log
+ * - one for each mirror leg
+ * - one for the user-visible mirror LV
+ */
+ struct dm_list lvs;
+
+ struct dm_list tags;
+
+ /*
+ * FIXME: Move the next fields into a different struct?
+ */
+
+ /*
+ * List of removed physical volumes by pvreduce.
+ * They have to get cleared on vg_commit.
+ */
+ struct dm_list removed_pvs;
+ uint32_t open_mode; /* FIXME: read or write - check lock type? */
+
+ /*
+ * Store result of the last vg_read().
+ * 0 for success else appropriate FAILURE_* bits set.
+ */
+ uint32_t read_status;
+ uint32_t mda_copies; /* target number of mdas for this VG */
+};
+
+uint32_t vg_seqno(const struct volume_group *vg);
+uint64_t vg_status(const struct volume_group *vg);
+int vg_set_alloc_policy(struct volume_group *vg, alloc_policy_t alloc);
+int vg_set_clustered(struct volume_group *vg, int clustered);
+uint64_t vg_size(const struct volume_group *vg);
+uint64_t vg_free(const struct volume_group *vg);
+uint64_t vg_extent_size(const struct volume_group *vg);
+int vg_set_extent_size(struct volume_group *vg, uint32_t new_extent_size);
+uint64_t vg_extent_count(const struct volume_group *vg);
+uint64_t vg_free_count(const struct volume_group *vg);
+uint64_t vg_pv_count(const struct volume_group *vg);
+uint64_t vg_max_pv(const struct volume_group *vg);
+int vg_set_max_pv(struct volume_group *vg, uint32_t max_pv);
+uint64_t vg_max_lv(const struct volume_group *vg);
+int vg_set_max_lv(struct volume_group *vg, uint32_t max_lv);
+uint32_t vg_mda_count(const struct volume_group *vg);
+uint32_t vg_mda_used_count(const struct volume_group *vg);
+uint32_t vg_mda_copies(const struct volume_group *vg);
+int vg_set_mda_copies(struct volume_group *vg, uint32_t mda_copies);
+/*
+ * Returns visible LV count - number of LVs from user perspective
+ */
+unsigned vg_visible_lvs(const struct volume_group *vg);
+/*
+ * Count snapshot LVs.
+ */
+unsigned snapshot_count(const struct volume_group *vg);
+
+uint64_t vg_mda_size(const struct volume_group *vg);
+uint64_t vg_mda_free(const struct volume_group *vg);
+
+#endif
git://sourceware.org / lvm2.git / commitdiff