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The libdevmapper interface compares existing table line retrieved from
the kernel to new table line created to decide if it can suppress a reload.
Any difference between input and output of the table line is taken to be a
change thus causing a table reload.
The dm-raid target started to misorder the raid parameters (e.g. 'raid10_copies')
starting with dm-raid target version 1.9.0 up to (excluding) 1.11.0. This causes
runtime failures (limited to raid10 as of tests) and needs to be reversed to allow
e.g. old lvm2 uspace to run properly.
Check for the aforementioned version range and adjust creation of the table line
to the respective (mis)ordered sequence inside and correct order outside the range
(as described for the raid target in the kernels Documentation/device-mapper/dm-raid.txt).
lvcreate --thinpool POOL1 -L 100M --virtualsize 100M snapper_thinp
https://bugzilla.redhat.com/1434027
(The general rule is that a command is accepted if it is unambiguous.
The combination -L -V --thinpool uniquely identifies the operation.)
Udev events can come in like a flood when something changes. It really
doesn't do us any good to refresh the state of the service numerous times
when 1 would suffice. We had something like this before, but it was
removed when we added the refresh thread. However, we have since learned
that we need to sequence events in the correct order and block dbus
operations if we believe the state has been affected, thus udev events are
being processed on the main work queue. This change limits spurious
work items from getting to the queue.
If we always disable the sending of notify dbus events then in the case
where all the users are lvm dbus users we will be in udev handling mode
until at least 1 external lvm command occurs. Instead we will not disable
notify dbus until after we get at least 1 external event. This makes the
service get into the correct mode of operation faster.
lvconvert should not leak 'error' device.
(This patch is not fix the problem, just makes it more easily visible
instead of more confusing 'clvmd' trace).
Starting with dm-raid target version 1.9.0 shrinking of mapped devices is supported.
Check for support being present in lvresize and lvreduce.
Related: rhbz1394048
Since we want to test different cache policies with profiles mq&smq
raise version to 1.8.
TODO: maybe split in more tests so older targets can test here as well.
N.B.: passthrough is also not supported with version 1.3
Quering non-thin-pool segment for discard property may lead
to intenal error if the segment had set 'out-of-range' value,
so only thin-pool is allowed, for other it returns NULL.
If SubLVs to be removed still exist after an image removing
conversion (i.e. "lvconvert --yes --force --stripes N "
with N < total stripes) any request to convert to a different
striped/raid* level has to be rejected until after those freed
SubLVs got removed by running the aforementioned lvconvert again.
Add tests to check conversion to striped/raid* gets rejected.
Enhance a test comment.
Related: rhbz1191935
Related: rhbz1366296
Adjust to final target version 1.10.1 supporting reshape
properly and to recently changed report field specifications
(e.g. rehape_len_le) to allow these tests to run.
Lower mirror region size to suite the tiny test VG.
Previous commit 506d88a2ec introduced disabling lvmetad on repairs.
Avoid calling lvscan and use of any --config options altogether
in the mirror and raid DSOs.
Related: rhbz1380521
Repairing missing devices does not work reliably
with lvmetad, so disable lvmetad before repair.
A standard lvmetad refresh (pvscan --cache) will
enable lvmetad again.
Commit 07ded8059c assumed that the mirror is blocked which is not the case.
It is accessible, degraded and in need of repair because some of its legs
(partially) failed. Any auto-repair via dmeventd fails though because
of lvmetad not providing proper data about the failed PV(s). That's why
this workaround got introduced in commit 76f6951c3e until we get to
the lvmetad interaction core issue.
Mind any mirror auto-repair failure is caused by such lvmetad interaction
problems not yet solved so disabling lvmetad works as a resort as elaborated
on in the related bz.
Reintroducing the interim solution.
Resolves: rhbz1380521
