mirror of
git://sourceware.org/git/lvm2.git
synced 2024-10-28 11:55:55 +03:00
402 lines
9.9 KiB
C
402 lines
9.9 KiB
C
/*
|
|
* Copyright (C) 2003-2004 Sistina Software, Inc. All rights reserved.
|
|
* Copyright (C) 2004 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 General Public License v.2.
|
|
*
|
|
* You should have received a copy of the GNU 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 "toolcontext.h"
|
|
#include "segtype.h"
|
|
#include "display.h"
|
|
#include "activate.h"
|
|
#include "lv_alloc.h"
|
|
|
|
/*
|
|
* Replace any LV segments on given PV with temporary mirror.
|
|
* Returns list of LVs changed.
|
|
*/
|
|
int insert_pvmove_mirrors(struct cmd_context *cmd,
|
|
struct logical_volume *lv_mirr,
|
|
struct list *source_pvl,
|
|
struct logical_volume *lv,
|
|
struct list *allocatable_pvs,
|
|
struct list *lvs_changed)
|
|
{
|
|
struct list *segh;
|
|
struct lv_segment *seg;
|
|
struct lv_list *lvl;
|
|
struct pv_list *pvl;
|
|
int lv_used = 0;
|
|
uint32_t s, start_le, extent_count = 0u;
|
|
struct segment_type *segtype;
|
|
struct pe_range *per;
|
|
uint32_t pe_start, pe_end, per_end, stripe_multiplier;
|
|
|
|
/* Only 1 PV may feature in source_pvl */
|
|
pvl = list_item(source_pvl->n, struct pv_list);
|
|
|
|
if (!(segtype = get_segtype_from_string(lv->vg->cmd, "mirror"))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (activation() && segtype->ops->target_present &&
|
|
!segtype->ops->target_present()) {
|
|
log_error("%s: Required device-mapper target(s) not "
|
|
"detected in your kernel", segtype->name);
|
|
return 0;
|
|
}
|
|
|
|
/* Split LV segments to match PE ranges */
|
|
list_iterate(segh, &lv->segments) {
|
|
seg = list_item(segh, struct lv_segment);
|
|
for (s = 0; s < seg->area_count; s++) {
|
|
if (seg->area[s].type != AREA_PV ||
|
|
seg->area[s].u.pv.pvseg->pv->dev != pvl->pv->dev)
|
|
continue;
|
|
|
|
/* Do these PEs need moving? */
|
|
list_iterate_items(per, pvl->pe_ranges) {
|
|
pe_start = seg->area[s].u.pv.pvseg->pe;
|
|
pe_end = pe_start + seg->area_len - 1;
|
|
per_end = per->start + per->count - 1;
|
|
|
|
/* No overlap? */
|
|
if ((pe_end < per->start) ||
|
|
(pe_start > per_end))
|
|
continue;
|
|
|
|
if (seg->segtype->flags & SEG_AREAS_STRIPED)
|
|
stripe_multiplier = seg->area_count;
|
|
else
|
|
stripe_multiplier = 1;
|
|
|
|
if ((per->start != pe_start &&
|
|
per->start > pe_start) &&
|
|
!lv_split_segment(lv, seg->le +
|
|
(per->start - pe_start) *
|
|
stripe_multiplier)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if ((per_end != pe_end &&
|
|
per_end < pe_end) &&
|
|
!lv_split_segment(lv, seg->le +
|
|
(per_end - pe_start + 1) *
|
|
stripe_multiplier)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Work through all segments on the supplied PV */
|
|
list_iterate(segh, &lv->segments) {
|
|
seg = list_item(segh, struct lv_segment);
|
|
for (s = 0; s < seg->area_count; s++) {
|
|
if (seg->area[s].type != AREA_PV ||
|
|
seg->area[s].u.pv.pvseg->pv->dev != pvl->pv->dev)
|
|
continue;
|
|
|
|
pe_start = seg->area[s].u.pv.pvseg->pe;
|
|
|
|
/* Do these PEs need moving? */
|
|
list_iterate_items(per, pvl->pe_ranges) {
|
|
per_end = per->start + per->count - 1;
|
|
|
|
if ((pe_start < per->start) ||
|
|
(pe_start > per_end))
|
|
continue;
|
|
|
|
log_debug("Matched PE range %u-%u against "
|
|
"%s %u len %u", per->start, per_end,
|
|
dev_name(seg->area[s].u.pv.pvseg->
|
|
pv->dev),
|
|
seg->area[s].u.pv.pvseg->pe,
|
|
seg->area_len);
|
|
|
|
/* First time, add LV to list of LVs affected */
|
|
if (!lv_used) {
|
|
if (!(lvl = pool_alloc(cmd->mem, sizeof(*lvl)))) {
|
|
log_error("lv_list alloc failed");
|
|
return 0;
|
|
}
|
|
lvl->lv = lv;
|
|
list_add(lvs_changed, &lvl->list);
|
|
lv_used = 1;
|
|
}
|
|
|
|
log_very_verbose("Moving %s:%u-%u of %s/%s",
|
|
dev_name(pvl->pv->dev),
|
|
seg->area[s].u.pv.pvseg->pe,
|
|
seg->area[s].u.pv.pvseg->pe +
|
|
seg->area_len - 1,
|
|
lv->vg->name, lv->name);
|
|
|
|
start_le = lv_mirr->le_count;
|
|
if (!lv_extend(lv->vg->fid, lv_mirr, segtype, 1,
|
|
seg->area_len, 0u, seg->area_len,
|
|
seg->area[s].u.pv.pvseg->pv,
|
|
seg->area[s].u.pv.pvseg->pe,
|
|
PVMOVE, allocatable_pvs,
|
|
lv->alloc)) {
|
|
log_error("Unable to allocate "
|
|
"temporary LV for pvmove.");
|
|
return 0;
|
|
}
|
|
set_lv_segment_area_lv(seg, s, lv_mirr, start_le);
|
|
|
|
extent_count += seg->area_len;
|
|
|
|
lv->status |= LOCKED;
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
log_verbose("Moving %u extents of logical volume %s/%s", extent_count,
|
|
lv->vg->name, lv->name);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Remove a temporary mirror */
|
|
int remove_pvmove_mirrors(struct volume_group *vg,
|
|
struct logical_volume *lv_mirr)
|
|
{
|
|
struct list *lvh, *segh;
|
|
struct logical_volume *lv1;
|
|
struct lv_segment *seg, *mir_seg;
|
|
uint32_t s, c;
|
|
|
|
/* Loop through all LVs except the temporary mirror */
|
|
list_iterate(lvh, &vg->lvs) {
|
|
lv1 = list_item(lvh, struct lv_list)->lv;
|
|
if (lv1 == lv_mirr)
|
|
continue;
|
|
|
|
/* Find all segments that point at the temporary mirror */
|
|
list_iterate(segh, &lv1->segments) {
|
|
seg = list_item(segh, struct lv_segment);
|
|
for (s = 0; s < seg->area_count; s++) {
|
|
if (seg->area[s].type != AREA_LV ||
|
|
seg->area[s].u.lv.lv != lv_mirr)
|
|
continue;
|
|
|
|
/* Find the mirror segment pointed at */
|
|
if (!(mir_seg = find_seg_by_le(lv_mirr,
|
|
seg->area[s].
|
|
u.lv.le))) {
|
|
/* FIXME Error message */
|
|
log_error("No segment found with LE");
|
|
return 0;
|
|
}
|
|
|
|
/* Check the segment params are compatible */
|
|
/* FIXME Improve error mesg & remove restrcn */
|
|
if ((!(mir_seg->segtype->flags
|
|
& SEG_AREAS_MIRRORED)) ||
|
|
!(mir_seg->status & PVMOVE) ||
|
|
mir_seg->le != seg->area[s].u.lv.le ||
|
|
mir_seg->area_count != 2 ||
|
|
mir_seg->area_len != seg->area_len) {
|
|
log_error("Incompatible segments");
|
|
return 0;
|
|
}
|
|
|
|
/* Replace original segment with newly-mirrored
|
|
* area (or original if reverting)
|
|
*/
|
|
if (mir_seg->extents_copied ==
|
|
mir_seg->area_len)
|
|
c = 1;
|
|
else
|
|
c = 0;
|
|
|
|
if (!set_lv_segment_area_pv(seg, s,
|
|
mir_seg->area[c].u.pv.pvseg->pv,
|
|
mir_seg->area[c].u.pv.pvseg->pe)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
/* Replace mirror with old area */
|
|
if (!
|
|
(mir_seg->segtype =
|
|
get_segtype_from_string(vg->cmd,
|
|
"striped"))) {
|
|
log_error("Missing striped segtype");
|
|
return 0;
|
|
}
|
|
mir_seg->area_count = 1;
|
|
|
|
/* FIXME Assumes only one pvmove at a time! */
|
|
lv1->status &= ~LOCKED;
|
|
}
|
|
}
|
|
if (!lv_merge_segments(lv1))
|
|
stack;
|
|
|
|
}
|
|
|
|
|
|
return 1;
|
|
}
|
|
|
|
const char *get_pvmove_pvname_from_lv_mirr(struct logical_volume *lv_mirr)
|
|
{
|
|
struct list *segh;
|
|
struct lv_segment *seg;
|
|
|
|
list_iterate(segh, &lv_mirr->segments) {
|
|
seg = list_item(segh, struct lv_segment);
|
|
if (!(seg->segtype->flags & SEG_AREAS_MIRRORED))
|
|
continue;
|
|
if (seg->area[0].type != AREA_PV)
|
|
continue;
|
|
return dev_name(seg->area[0].u.pv.pvseg->pv->dev);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
const char *get_pvmove_pvname_from_lv(struct logical_volume *lv)
|
|
{
|
|
struct list *segh;
|
|
struct lv_segment *seg;
|
|
uint32_t s;
|
|
|
|
list_iterate(segh, &lv->segments) {
|
|
seg = list_item(segh, struct lv_segment);
|
|
for (s = 0; s < seg->area_count; s++) {
|
|
if (seg->area[s].type != AREA_LV)
|
|
continue;
|
|
return get_pvmove_pvname_from_lv_mirr(seg->area[s].u.lv.lv);
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct logical_volume *find_pvmove_lv(struct volume_group *vg,
|
|
struct device *dev,
|
|
uint32_t lv_type)
|
|
{
|
|
struct list *lvh, *segh;
|
|
struct logical_volume *lv;
|
|
struct lv_segment *seg;
|
|
|
|
/* Loop through all LVs */
|
|
list_iterate(lvh, &vg->lvs) {
|
|
lv = list_item(lvh, struct lv_list)->lv;
|
|
|
|
if (!(lv->status & lv_type))
|
|
continue;
|
|
|
|
/* Check segment origins point to pvname */
|
|
list_iterate(segh, &lv->segments) {
|
|
seg = list_item(segh, struct lv_segment);
|
|
if (seg->area[0].type != AREA_PV)
|
|
continue;
|
|
if (seg->area[0].u.pv.pvseg->pv->dev != dev)
|
|
continue;
|
|
return lv;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct logical_volume *find_pvmove_lv_from_pvname(struct cmd_context *cmd,
|
|
struct volume_group *vg,
|
|
const char *name,
|
|
uint32_t lv_type)
|
|
{
|
|
struct physical_volume *pv;
|
|
|
|
if (!(pv = find_pv_by_name(cmd, name))) {
|
|
stack;
|
|
return NULL;
|
|
}
|
|
|
|
return find_pvmove_lv(vg, pv->dev, lv_type);
|
|
}
|
|
|
|
struct list *lvs_using_lv(struct cmd_context *cmd, struct volume_group *vg,
|
|
struct logical_volume *lv)
|
|
{
|
|
struct list *lvh, *segh, *lvs;
|
|
struct logical_volume *lv1;
|
|
struct lv_list *lvl;
|
|
struct lv_segment *seg;
|
|
uint32_t s;
|
|
|
|
if (!(lvs = pool_alloc(cmd->mem, sizeof(*lvs)))) {
|
|
log_error("lvs list alloc failed");
|
|
return NULL;
|
|
}
|
|
|
|
list_init(lvs);
|
|
|
|
/* Loop through all LVs except the one supplied */
|
|
list_iterate(lvh, &vg->lvs) {
|
|
lv1 = list_item(lvh, struct lv_list)->lv;
|
|
if (lv1 == lv)
|
|
continue;
|
|
|
|
/* Find whether any segment points at the supplied LV */
|
|
list_iterate(segh, &lv1->segments) {
|
|
seg = list_item(segh, struct lv_segment);
|
|
for (s = 0; s < seg->area_count; s++) {
|
|
if (seg->area[s].type != AREA_LV ||
|
|
seg->area[s].u.lv.lv != lv)
|
|
continue;
|
|
if (!(lvl = pool_alloc(cmd->mem, sizeof(*lvl)))) {
|
|
log_error("lv_list alloc failed");
|
|
return NULL;
|
|
}
|
|
lvl->lv = lv1;
|
|
list_add(lvs, &lvl->list);
|
|
goto next_lv;
|
|
}
|
|
}
|
|
next_lv:
|
|
;
|
|
}
|
|
|
|
return lvs;
|
|
}
|
|
|
|
float copy_percent(struct logical_volume *lv_mirr)
|
|
{
|
|
uint32_t numerator = 0u, denominator = 0u;
|
|
struct list *segh;
|
|
struct lv_segment *seg;
|
|
|
|
list_iterate(segh, &lv_mirr->segments) {
|
|
seg = list_item(segh, struct lv_segment);
|
|
|
|
denominator += seg->area_len;
|
|
|
|
if (seg->segtype->flags & SEG_AREAS_MIRRORED)
|
|
numerator += seg->extents_copied;
|
|
else
|
|
numerator += seg->area_len;
|
|
}
|
|
|
|
return denominator ? (float) numerator *100 / denominator : 100.0;
|
|
}
|