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Basically reverting commit 58a9f88b8c.
We can use origin_only in case we are snapshot's origin,
as we do support this stack.
So when we are 'uncaching' origin+snaps - we do need to reload only
origin and we do not need to play with snaps.
Handle change of 'region size' better and follow also standard rule
if the command can't success (i.e. size is already same) we return
error for all such cases.
Also log_pring more info about adjusted value (just like we
do for rounding)
Also avoid keep pointers on 'display_*' values - they are in
ringbuffer for immediate use - not to be kept across multiple calls
(as they could be already overwritten by later calls) - so dropped
seg_region_size_str
'lvdisplay -m' tried to go through NULL policy settings,
when such policy was not defined for CachedLV.
Patch is fixing display of cache-pool without defined settings,
as this is now a valid pool and we mostly want users to define
these settings when actually really caching a LV.
Since cache LV can be a stacked device, there is no real reason
trying to use slight optimised tree for origin_only cache reload
(it could be even wrongly implemented in this case).
We can easily go with stardard tree load here.
When user runs command like 'lvconvert --splitcache' the operation
might be actually either slow or not making any progress in kernel,
so lets give user a chance to abort such operation.
When user press 'Ctrl+C' device table is restored to pre-flushing state.
Remove explicit activation of SubLVs and let lv_update_and_reload()
perform the proper (pre-)loading sequencing of tables.
This avoids related callback functions which are removed.
Related: rhbz1448116
Related: rhbz1461526
Related: rhbz1448123
When lock-holding LV differs from actually request locked LV,
we drop origin_only flag as it has no use - it'd be applied
on completely different LV.
Example of problem:
Raid is thin-pool _tdata LV.
Raid run origin_only locking on stacked device.
As lock holder is discovered thinLV.
Whole origin_only operation is then applied only on thinLV
changing the meaning of whole operation.
NOTE: this patch does not change anything for LV that are
already top-level lock holding LVs (i.e. thinLVs, snahoshots/origins).
Disable until we have a proper fix for reshape space allocation,
switching it to begin/end of rimages and activation in the cluster.
Related: rhbz1448116
Related: rhbz1461526
Related: rhbz1448123
Commit 1fe4f80e45 in current version
introduced regression for a terminal user, as he could not enter 'n'
as answer. Add missing break for this case (No whats_new).
New tests to add checking for '100%' in-sync at start of "recover"
process (it shouldn't happen, but I've seen it before). Also,
check status over the whole cycle of various sync processes ("resync"
and "recover").
Enhance reporting code, so it does not need to do 'extra' ioctl to
get 'status' of normal raid and provide percentage directly.
When we have 'merging' snapshot into raid origin, we still need to get
this secondary number with extra status call - however, since 'raid'
is always a single segment LV - we may skip 'copy_percent' call as
we directly know the percent and also with better precision.
NOTE: for mirror we still base reported number on the percetage of
transferred extents which might get quite imprecisse if big size
of extent is used while volume itself is smaller as reporting jump
steps are much bigger the actual reported number provides.
2nd.NOTE: raid lvs line report already requires quite a few extra status
calls for the same device - but fix will be need slight code improval.
Current existing kernels reports status sometimes in weird form.
Instead of showing what is the exact progress, we need to estimate
this in-sync state from several surrounding states.
Main reason here is to never report 100% sync state for a raid device
which will be undergoing i.e. recovery.
Relative to last comit ddf2a1d656:
adjust the dm-raid target version to 1.12.0 which shows
mandatory kernel MD deadlock fixes related to reshaping
are presant in the kernel.
Related: rhbz1443999
First test in this file checks whether 'aa' is ever spotted during
a "recover" operation (it should not be). More tests should follow
in this file to look for oddities in status output - especially as
it relates to the sync_ratio, dev_health, and sync_action fields.
For the test clean-up, I was providing too many devices to the first
command - possibly allowing it to allocate in the wrong place. I was
also not providing a device for the second command - virtually ensuring
the test was not performing correctly at times.
This patch ensures that under normal conditions (i.e. not during repair
operations) that users are prevented from removing devices that would
cause data loss.
When a RAID1 is undergoing its initial sync, it is ok to remove all but
one of the images because they have all existed since creation and
contain all the data written since the array was created. OTOH, if the
RAID1 was created as a result of an up-convert from linear, it is very
important not to let the user remove the primary image (the source of
all the data). They should be allowed to remove any devices they want
and as many as they want as long as one original (primary) device is left
during a "recover" (aka up-convert).
This fixes bug 1461187 and includes the necessary regression tests.
