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When mirror/raid called copy_percent function to return,
when 100% was supposed to be returned, wrong float 100.0 value
could have been reported back instead of dm_percent_t DM_PERCENT_100.
There is broken API somewhere, since the function here rely on
actively being modifid VG content even when doing 'lvs' operation.
(extents_copies)
Support parsing --chunksize option also when converting.
Now user can use cache pool created with i.e. 32K chunksize,
while in caching user can select 512K blocks.
Tool is supposed to validate cache metadata size is big enough
to support such chunk size. Otherwise error is shown.
When creating LV - in some case we change created segment type
(ATM for cache and snapshot) and we then manipulate with
lv segment according to 'lp' segtype.
Fix this by checking for proper type before accessing segment members.
This makes command like:
lvcreate --type cache-pool -L10 vg/cpool
lvcreate -H -L10 --cachesettings migtation_threshold=10000 vg/cpool
to pass since now tool correctly selects default cache policy.
If there's an activation volume_filter, it might not be possible
to activate the rmeta LVs to wipe them. At least inherit any
LV tags from the parent LV while attempting this.
Commit b64703401d cause regression
when handling stacked resize of pool metadata volume that would
be a raid LV.
Fix it by properly setting up size also for layer extension.
Report proper values for historical LVs in lv_layout and lv_role fields.
Any historical LV doesn't have any layout anymore and the role is "history".
For example:
$ lvs -H -o name,lv_attr,lv_layout,lv_role vg/-lvol1
LV Attr Layout Role
-lvol1 ----h----- none public,history
Add support for making an interconnection between thin LV segment and
its indirect origin (which may be historical or live LV) - add a new
"indirect_origin" argument to attach_pool_lv function.
The add_glv_to_indirect_glvs is a helper function that registers a
volume represented by struct generic_logical_volume instance ("glv")
as an indirect user of another volume ("origin_glv") and vice versa -
it also registers the other volume ("origin_glv") as indirect_origin
of user volume ("glv").
The remove_glv_from_indirect_glvs does the opposite.
The get_or_create_glv is helper function that retrieves any existing
generic_logical_volume wrapper for the LV. If the wrapper does not exist
yet, it's created.
The get_org_create_glvl is the same as get_or_create_glv but it creates
the glv_list wrapper in addition so it can be added to a list.
Add new structures and new fields in existing structures to support
tracking history of LVs (the LVs which don't exist - the have been
removed already):
- new "struct historical_logical_volume"
This structure keeps information specific to historical LVs
(historical LV is very reduced form of struct logical_volume +
it contains a few specific fields to track historical LV
properties like removal time and connections among other LVs).
- new "struct generic_logical_volume"
Wrapper for "struct historical_logical_volume" and
"struct logical_volume" to make it possible to handle volumes
in uniform way, no matter if it's live or historical one.
- new "struct glv_list"
Wrapper for "struct generic_logical_volume" so it can be
added to a list.
- new "indirect_glvs" field in "struct logical_volume"
List that stores references to all indirect users of this LV - this
interconnects live LV with historical descendant LVs or even live
descendant LVs.
- new "indirect_origin" field in "struct lv_segment"
Reference to indirect origin of this segment - this interconnects
live LV (segment) with historical ancestor.
- new "this_glv" field in "struct logical_volume"
This references an existing generic_logical_volume wrapper for this
LV, if used. It can be NULL if not needed - which means we're not
handling historical LVs at all.
- new "historical_lvs" field in "struct volume group
List of all historical LVs read from VG metadata.
Simplify calculation of extents rounding needed for
segment size.
Segment size has to divisible by 'extent count' needed to contain
whole stripe. LVM currently does not support stripes across segment.
In case the stripe size is bigger then extent size,
require bigger rounding.
Internal _alloc_init() is only called from allocate_extents(),
which already does prevent usage of virtual segments.
So mark as internal error early and do not process it any further.
Since we mark cache-pool as 'hidden/private' while it is in-use,
we may still allow user to change it's name.
It should not cause any harm and user may prefer better naming
for a cache-pool in use.
