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Wipe initial 4KiB for non-zeroed thin volumes

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If the thin pool has disabled zeroing  (created with -Zn), we at least
clear initial 4KiB of such thin volume (provisions 1st block).

If lvcreate is executed with '-an' command will abort (same way like we for
normal LV - however for normal LV option -Zn may skip clearing completely,
for thin volumes this option is not supported (applies only for pools).
This commit is contained in:
Zdenek Kabelac 2012-02-29 22:08:57 +00:00
parent 62e38da133
commit 24ab6328f7
2 changed files with 5 additions and 1 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.94 -
====================================
Use set_lv() (wipe initial 4KiB) for non zeroed thin volume.
Allow cluster mirrors to handle the absence of the checkpoint lib (libSaCkpt).
Revert free of allocated segtype in init segment error path (2.02.89).
Test dm_hash_insert() failures in filter-persistent.c and fid_add_mda().

5
lib/metadata/lv_manip.c
View File

@ -4457,7 +4457,10 @@ static struct logical_volume *_lv_create_an_lv(struct volume_group *vg, struct l
if (!seg_is_thin(lp) && !lp->zero && !lp->snapshot)
log_warn("WARNING: \"%s\" not zeroed", lv->name);
else if (!seg_is_thin(lp) && !set_lv(cmd, lv, UINT64_C(0), 0)) {
else if ((!seg_is_thin(lp) ||
(lv_is_thin_volume(lv) &&
!first_seg(first_seg(lv)->pool_lv)->zero_new_blocks)) &&
!set_lv(cmd, lv, UINT64_C(0), 0)) {
log_error("Aborting. Failed to wipe %s.",
lp->snapshot ? "snapshot exception store" :
"start of new LV");