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Move code for creation of thin volume into a single place
out of lv_extend(). This allows to drop extra pool arg
for alloc_lv_segment() && lv_extend() and makes code
more easier to read and follow.
When we create volumes with chunk size bigger then extent size
we try to round up to some nearest chunk boundary.
Until now we did this for thins - use same logic for
cache volumes.
Fixed syntax parsing means that some commands that used to work are now
failing. Particullary this case:
$ invalid lvcreate -l1 --type thin vg/pool
> Needs to fail becase thin type LV needs --virtualsize
$ invalid lvcreate --type snapshot vg/lv1
> Needs to fail because old-snapshot segment type needs --size
Some reported error messages have been also updated.
Use segment flags to avoid zeroing of cache, cache pool
snapshot and thin pool segments.
We never want to zero these segment types.
Note:
Snapshot COW and Cache origin are created as stripes
thus are then properly zeroed.
Let the finaly state of zero & wipe_signature to be
resolved later together with all the types.
Don't play with zero assigment and segtype flag
(i.e. thin-pool -Z has different meaning).
Check if the passed options do allow requested zeroing/wiping.
lvcreate without -Z or -W will fallback to warning if the device
cannot be zeroed, however if user requested them explicitely
it will give user error.
Refactor lvcreate code.
Prefer to use arg_outside_list_is_set() so we get automatic 'white-list'
validation of supported options with different segment types.
Drop used lp->cache, lp->cache and use seg_is_cache(), seg_is_thin()
Draw clear border where is the last moment we could change create
segment type.
When segment type is given with --type - do not allow it to be changed
later.
Put together tests related to individual segment types.
Finish cache conversion at proper part of lv_manip code after
the vg_metadata are written - so we could correcly clean-up created
stripe LV for cache volume.
Move test for size of new LV names in front before
any creation of LV.
Properly check striped segtype kernel presence,
since passed 'segtype' is already tested.
Keep deactivation error path local to wiping part of the function.
Create metadata with temporary flag (it's activated, zeroed
and deactivated).
Introduce new option to specify pool data size.
This will be user to create i.e. cache & cachepool at once.
And possible for thin external origin snapshot.
This is only very basic patch to enable options, the
real working code will come later.
We want to print smarter warning message only when
the zeroing was not provided on the first zeroable segment
of newly created LV.
Put warning within _should_wipe_lv function to avoid reevaluation
of same conditions twice.
Hide creation of temporary LVs and print them only in verbose mode.
e.g. hides confusing message about creation of _pmspare
device during creation of pool.
Use new libdm macro DM_LIST_HEAD_INIT().
Embeded 'free' segment type (so it's not needed in the list)
Drop assignments of 0,NULL since they are defaults.
Ask for lock the proper LV.
Use the top-most LV to query for locally exclusive lock.
The rest of operations are then using 'lv_info()'
TODO:
Check all devices are reloaded from proper level.
In general any query on lv_is_active is supposed to be running
ona lv_lock_holder() volume.
Now we reference segment name via lvseg_name() and
we can drop default implementation and leave its
function pointer to be NULL.
Default give us 'return seg->segtype->name'.
