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Support compile type configurable defaults for creation
of sparse volumes.
By default now create 'thin-pools' for sparse volumes.
Use the global/sparse_segtype_default to switch back to old
snapshots if needed.
Apply the same compile logic for newly introduces mirror/raid1 options.
Unlike with thin-pool - with cache we support all args also
directly when create cache volume.
So the result of 'separate' cache-pool creation and setting its
options should give same result as specifying those args
during cache creation.
Cache-pool values are used as defaults if the params are
not specified with cache creation.
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.
When we are given an existing LV name - it needs to be allowed
to pass in even restricted name as the LV could have existed
long before we introduced some new restriction on prefix/suffix.i
Fix the regression on name limits and drop restriction to be applied
on any existing LVs - only the new created LV names have to be
complient with current name restrictions.
FIXME: we are currently using restricted names incorrectly in few
other places - device_is_usable() skips restricted names,
and udev flags are also incorrectly set for restricted names
so these LVs are not getting links properly.
Move code to better locations.
Improve test and remove invalid ones
(i.e. no reason to require cache size to be >= then origin).
Correctly comment where the code is doing actual conversion
of other existing volume - we do already a similar thing with
external origins.
Lots of new command line options and combinations is now supported.
Hopefully older syntax still works as well.
lvcreate --cache --cachepool vg/pool -l1
lvcreate --type cache --cachepool vg/pool -l1
lvcreate --type cache-pool vg/pool -l1
lvcreate --type cache-pool --name pool vg -l1
... and many many more ...
Over the time lvcreate code has accumulated various hacks.
So try to move that code in right places.
Detect all types early in _lvcreate_params() so functions like
_read_size_params() do not need to change volume types.
Also ultimately respect give volume --type, that its shortcut
(-T, H, -m, -s) and after that options which do type estimation.
(i.e. --cachepool, --thinpool)
Avoid repeative tests - if we know all types are decode at once
place we can 'optimize' number of validations.
The cache mode of a new cache pool is always explicitly
included in the vg metadata. If a cache mode is not
specified on the command line, the cache mode is taken
from lvm.conf allocation/cache_pool_cachemode, which
defaults to "writethrough".
The cache mode can be displayed with lvs -o+cachemode.
We are not using already defined segement type names where we could.
There is a lot of other places in device-mapper and LVM2 we have those
hardcoded so we should better finally have a common interface in
libdevmapper to avoid this.
Move common code for reading and processing
of --persistent arguments for lvcreate and lvchange
into lvmcmdline.
Reuse validate_major_minor() routine for validation.
Don't blindly activate LVs after change in cluster
and instead only local reactivation is supported.
(we have now many limited targets now).
Dropping 'sigint_caught()' handling, since
prompt() is resolving this case itself.
Fix get_pool_params to only read params.
Add poolmetadataspare option to get_pool_params.
Move all profile code into update_pool_params.
Move recalculate code into pool_manip.c
Let's use the size of origin as the real base for percenta calculation,
and 'silenly' add needed metadata space for snapshot.
So now command 'lvcreate -s -l100%ORIGIN vg/lv' should always create a
snapshot to handle full device overwrite.
Expresing -lXX%LV is not valid for snapshot, but error message for
snapshost case was not complete and missed %ORIGIN.
Also document correct settings for in manpage properly where
it missed %PVS.
When read-only snapshot was created, tool was skipping header
initialization of cow device. If it happened device has been
already containing header from some previous snapshot, it's
been 'reused' for a newly created snapshot instead of being cleared.
