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Code Releases Activity

When removing a snapshot avoid preloading the origin if the

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snapshot-merge target is not active.
This commit is contained in:
Mike Snitzer 2010-04-23 02:57:39 +00:00
parent 616eda51e3
commit 1f661c5dd8
5 changed files with 40 additions and 12 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.64 -
=================================
Don't preload the origin when removing a snapshot whose merge is pending.
Disallow the addition of mirror images while a conversion is happening.
Disallow primary mirror image removal when mirror is not in-sync.
Remove obsolete --name parameter from vgcfgrestore.

3
lib/activate/activate.h
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@ -95,6 +95,9 @@ int lvs_in_vg_opened(const struct volume_group *vg);
int lv_is_active(struct logical_volume *lv);
int lv_has_target_type(struct dm_pool *mem, struct logical_volume *lv,
const char *layer, const char *target_type);
int monitor_dev_for_events(struct cmd_context *cmd,
struct logical_volume *lv, int do_reg);

10
lib/activate/dev_manager.c
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@ -329,10 +329,8 @@ static int _status(const char *name, const char *uuid,
return 0;
}
static int _lv_has_target_type(struct dev_manager *dm,
struct logical_volume *lv,
const char *layer,
const char *target_type)
int lv_has_target_type(struct dm_pool *mem, struct logical_volume *lv,
const char *layer, const char *target_type)
{
int r = 0;
char *dlid;
@ -343,7 +341,7 @@ static int _lv_has_target_type(struct dev_manager *dm,
char *type = NULL;
char *params = NULL;
if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, layer)))
if (!(dlid = build_dm_uuid(mem, lv->lvid.s, layer)))
return_0;
if (!(dmt = _setup_task(NULL, dlid, 0,
@ -1183,7 +1181,7 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
((dinfo = _cached_info(dm->mem, find_merging_cow(lv)->cow,
dtree)) && dinfo->open_count)) {
/* FIXME Is there anything simpler to check for instead? */
if (!_lv_has_target_type(dm, lv, NULL, "snapshot-merge"))
if (!lv_has_target_type(dm->mem, lv, NULL, "snapshot-merge"))
clear_snapshot_merge(lv);
}
}

21
lib/metadata/snapshot_manip.c
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@ -18,6 +18,7 @@
#include "locking.h"
#include "toolcontext.h"
#include "lv_alloc.h"
#include "activate.h"
int lv_is_origin(const struct logical_volume *lv)
{
@ -176,16 +177,24 @@ int vg_remove_snapshot(struct logical_volume *cow)
dm_list_del(&cow->snapshot->origin_list);
origin->origin_count--;
if (find_merging_cow(origin) == find_cow(cow)) {
clear_snapshot_merge(origin);
/*
* preload origin to:
* - allow proper release of -cow
* - avoid allocations with other devices suspended
* when transitioning from "snapshot-merge" to
* "snapshot-origin after a merge completes.
* preload origin IFF "snapshot-merge" target is active
* - IMPORTANT: avoids preload if onactivate merge is pending
*/
preload_origin = 1;
if (lv_has_target_type(origin->vg->cmd->mem, origin, NULL,
"snapshot-merge")) {
/*
* preload origin to:
* - allow proper release of -cow
* - avoid allocations with other devices suspended
* when transitioning from "snapshot-merge" to
* "snapshot-origin after a merge completes.
*/
preload_origin = 1;
}
}
if (!lv_remove(cow->snapshot->lv)) {

17
test/t-snapshot-merge.sh
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@ -76,6 +76,23 @@ dmsetup table ${vg}-${lv1} | grep -q " snapshot-merge "
lvremove -f $vg/$lv1
# "onactivate merge" test
# -- deactivate/remove after disallowed merge attempt, tests
# to make sure preload of origin's metadata is _not_ performed
setup_merge $vg $lv1
lvs -a
mkdir test_mnt
mount $(lvdev_ $vg $lv1) test_mnt
lvconvert --merge $vg/$(snap_lv_name_ $lv1)
# -- refresh LV while FS is still mounted (merge must not start),
# verify 'snapshot-origin' target is still being used
lvchange --refresh $vg/$lv1
umount test_mnt
rm -r test_mnt
dmsetup table ${vg}-${lv1} | grep -q " snapshot-origin "
lvremove -f $vg/$lv1
# test multiple snapshot merge; tests copy out that is driven by merge
setup_merge $vg $lv1 1
lvs -a