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Handle the case of device teardown where the first pass
could have only a single, but opened device, for removal.
In such case we want to at least once go through
the udev_wait and retry removal again.
TODO: maybe a sleep .1 might be usable as well with udev_wait
Since lvmdbusd testing tends to do its own logging,
try for now to disable very generic logging mechnanism
of the test suite and see the result.
Some lvmdbusd test seems to rely on some log/file logic
which is modified with the use of these shell vars.
Hunt also for devices with LVMTEST prefix in UUID.
Call teardown_devs_prefixed - so if they hold RAM or SCSI
they are closed before trying to remove kernel modules.
Previous fix was invalid (after some in-place shuffling)
'dd' copied goes to 'stderr' so we need to catch all output.
Grep needs to check output of tee tool.
Ensure 'C' locales are in use with 'dd'.
New dmpd tools return version string in different format,
so update code to understand both variant.
Also hide some shell var setting to local functions.
Some linkers do need libdevmapper-event-lvm2.so.2.03,
so add also this symlink to the tests /lib dir.
This fixes the need to use previous LD_LIBRARY_PATH complex
setting and now works with much shorter list.
Compilation may configure it's own /etc path so ensure the test
has a defined location for access to this dir during testing.
Also prepare machine_id filei (with the use of uuidgen tool)
for the test.
Previous commit cause the pvmove could actually be started in unexpected
order - so make sure, we are not starting new pvmove in same VG until
the previous one is started.
Keep backups within test_dir instead of dev_dir (so it doesn't
leak large files there if the tests are run over real /dev dir).
Move restoring of dm_mirror throttling before test_dir is removed.
Not quite sure if this helps anything, some of testing
machines can't reliably remove scsi_debug, reporting
they are in use - but it's not easily reproducible...
aux wait_pvmove_lv_ready() now handles multiple pvmove LVs
at one go - which allows a bit fast checking - although
at some point we may need to switch to use delayed devs
since mirror throttling seems to be no longer working well,
as CPU are getting so fast, that most of data are already
pvmoved before throttling has any chance to do something...
When 'brd' device can be removed (is unused AKA not opened),
remove such device and use again for testing.
Let's assume user has no unused brd device left in the system.
When the 'tests' sometimes fail to cleanup devices, with this
change futher cleanup from some next test may evenually release
brd device and make it available for testing.
Add function to corrupt some bytes in give file path presenting
a device. 1st. patern in just once replaced with 2nd. pattern.
Usable to simulate some bit corruption for integrity devices.
Reduce shellcheck warnings about missing {} for possible array
dereference.
Make sure we are not loosing error code when assigning local vars
and explicitely ignore 'errors' from standalone lines when needed.
Add some missing quotes.
Use $() instead of ancient ``
Avoid writing some temporary data into /tmp - test need to store
files within its own 'testdir' - so it can be properly discarded.
If we plan to use dm throttling for mirror targets - we actually
have to check whether kernel runs with CONFIG_HZ_1000 - if it does
not the whole idea of throttling is actually not working in the
testsuite as within a single 'tick' with HZ 100 way too much date
is being moved on any modern hardware - and since there is no plan
to change this in kernel - we simply avoid using throttling on such
kernel and test needs to work differently - either ignore results
or use much larger mirror sizes...
Introduce a replacement vdo manager wrapper for testing.
When using test suite on a system without vdo manager (which has got
deprecated) - we still need its functionality to prepare 'vdo volume'
for testing lvm_import_vdo.
Wrapper currently need 2 binaries from older 'vdo 6.2' package -
to be named:
oldvdoformat - format VDO metadata with older format
oldvdoprepareforlvm - shift vdo metadata by 1MiB
