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vdo: use fixed size vdopool wrapper

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Instead of using size of 'empty header' in vdopool use fixed size 4K
for a 'wrappeing' vdo-pool device.

This fixes the issue when user tried to activate vdo-pool after
a conversion from vdo managed device with 'vgchange -ay' - where
this command activated all LVs with 'vdo-pool' wrapping device as well,
but this converted pool uses  0-length header.

This 4k size should usually prevent other tools like 'blkid' recognize
such device as anything - so it shouldn't cause any problems with
duplicate indentification of devices.
This commit is contained in:
Zdenek Kabelac 2023-03-06 14:52:59 +01:00
parent 334117ee00
commit e8e6347ba3
1 changed files with 1 additions and 1 deletions
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2
lib/activate/dev_manager.c
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@ -3115,7 +3115,7 @@ static int _add_layer_target_to_dtree(struct dev_manager *dm,
/* Add linear mapping over layered LV */
/* From VDO layer expose ONLY vdo pool header, we would need to use virtual size otherwise */
if (!add_linear_area_to_dtree(dnode, lv_is_vdo_pool(lv) ? first_seg(lv)->vdo_pool_header_size : lv->size,
if (!add_linear_area_to_dtree(dnode, lv_is_vdo_pool(lv) ? 8 : lv->size,
lv->vg->extent_size,
lv->vg->cmd->use_linear_target,
lv->vg->name, lv->name) ||