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lvcreate of thin pools can now use '-n lv vg' like other lv types,
or it can name the new thin pool in the free arg as 'vg/lv', which
is not allowed with other lv types.
Introduce pool function for validation of chunk size.
It's good idea to be able to reject invalid chunk size
when entered on command line before we open VG.
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 ...
Since _pmspare is internal volume move it to
lv_remove_single - so it's automatically removed with
last remove thin-pool.
lv_remove_with_dependencies() is not always used for pool removal.
--splitcache
Splits only cached LV (also pool could be specified).
Detaches cachepool from cached LV.
--split
Should be univerzal command to split various complex targets.
At this moment it knows cache.
--uncache
Opposite command to --cache. Detaches and DELETES cachepool for
cached LV.
Note: we support thin pool cached metadata device for uncaching.
Also use may specify wither cached LV or association cachepool device
to request split of cache.
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.
Copy the same form as the new process_each_vg.
Replace unused struct cmd_vg and cmd_vg_read() replicator
code with struct vg and vg_read() directly.
The failed_lvnames arg is no longer used since the
cmd_vg replicator wrapper was removed.
[Committed by agk with cosmetic changes and tweaks.]
Split VG argument collection from processing.
This allows the two different loops through VGs to
be replaced by a single loop.
Replace unused struct cmd_vg and cmd_vg_read() replicator
code with struct vg and vg_read() directly.
[Committed by agk with cosmetic changes and tweaks.]
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.
filters/filter-usable.c:22: warning: "ucp.check_..." may be used uninitialized in this function
This can't actually be hit in real, but let's clean this up for the compiler
to be happy again.
There are actually three filter chains if lvmetad is used:
- cmd->lvmetad_filter used when when scanning devices for lvmetad
- cmd->filter used when processing lvmetad responses
- cmd->full_fiilter (which is just cmd->lvmetad_filter + cmd->filter chained together) used
for remaining situations
This patch adds the third one - "cmd->full_filter" - currently this is
used if device processing does not fall into any of the groups before,
for example, devices which does not have the PV label yet and we're just
creating a new one or we're processing the devices where the list of the
devices (PVs) is not returned by lvmetad initially.
Currently, the cmd->full_filter is used exactly in these functions:
- lvmcache_label_scan
- _pvcreate_check
- pvcreate_vol
- lvmdiskscan
- pvscan
- _process_each_label
If lvmetad is used, then simply cmd->full_filter == cmd->filter because
cmd->lvmetad_filter is NULL in this case.
