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For this syntax:
lvconvert --thinpool LV1 --poolmetadata LV2
lvconvert --cachepool LV1 --poolmetadata LV2
Restore the metadata swapping behavior in addition to
the pool creation behavior. When LV1 is already a pool,
the metadata LV will be swapped with LV2.
When LV1 is not a pool, it will be converted to a
pool using the specified LV for metadata.
This syntax is no longer advertised because of the
ambiguous behavior. The primary syntaxes for pool
creation and metadata swapping will be the advertised
methods.
As we now user binary search - it's nondeterministict
which of the same 'args' will be give - so duplicates
need 'extra' care.
So provide same hack for output for --uuidstr_ARG as
for input.
Solves 'pvscan -u'.
Since there is a lot of options and lot of searches,
use binary search to keep strcmp at minimum.
The interesting part is - alphabetically sorted array contains
duplicates and some of them are not the 'right anwer', so
after we find matching string but not matching long_ARG,
we may need to check if the surrouding strings are the right matching
one.
The single loops is used also for strictly define --foo_long
(i.e. --stripes) and just differs at final part.
TODO1: replace strstr call with some flag (just like short_opt).
TODO2: drop '--' from being stored and tests by strcmp.
When parsing command defs, track and report all
errors that are found. Add an error return case
from define_commands so the standard error exit
path is used.
When using liblvm2cmd, a process can do multiple
init/exit calls, i.e.
lvm2_init(); lvm2_run(); lvm2_exit();
lvm2_init(); lvm2_run(); lvm2_exit();
...
define_commands() needs to set up the global commands[]
definitions only the first time.
The old ad hoc arg parsing when combining a split snapshot
allowed the first lv to have a vgname, but not the second.
Since lvconvert now uses the standard arg parsing in
process_each_lv(), the old one-off behavior requires a
work around.
This reverts commit 717363bb94.
These alternate forms for swapping metadata cannot be
distinguished from the command for creating a pool.
If we were to add these alternate forms for swapping
metadata, we would need to overload the pool creation
command defs, making those definitions ambiguous.
Change run time access to the command_name struct
cmd->cname instead of indirectly through
cmd->command->cname. This removes the two run time
fields from struct command.
All lvconvert functionality has been moved out of the
previous monolithic lvconvert code, except conversions
related to raid/mirror/striped/linear. This switches
that remaining code to be based on command defs, and
standard process_each_lv arg processing. This final
switch results in quite a bit of dead code that is
also removed.
