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The physical_volume, volume_group, logical_volume and lv_segment
structures' 'status' member is now uint64_t.
The alignment of these structures was also audited to remove holes. The
movement of some members in 'volume_group' and 'lv_segment' eliminates
holes. The 'physical_volume' structure still has one 4-byte hole after
'pe_size'; the other structures no longer have any holes. Each
structures' size has not changed.
[root@xxxx-01 ~]# lvconvert -m 1 --corelog VG/cmirror
Unable to convert the log of inactive cluster mirror cmirror
I've tried to clean-up the message a little more, so the name
of the mirror stands out more while preserving the sense that
it's not a problem with the specific device, but the fact that
it is inactive that is causing the problem.
New msg:
Unable to convert the log of an inactive cluster mirror, cmirror
When mirror convert polling is started (mainly as backgound process,
in lvchange -a y or in lvconvert itself) it tries to read VG
and LV identified by its name.
Unfortunatelly, the VG can have already different LV under the same name,
and various more or less funny things can happen (note that
_finish_lvconvert_mirror suspends the volume for example).
(the typical example is our testing script which continuously recreates
LVs under the same name in the same VG.)
This patch adds optional uuid parameter which helps to properly
select the monitoring object. For lvconvert polling it is set to LV UUID
and both _get_lvconvert_vg and _get_lvconvert_lv uses it to read proper VG/LV.
(In the pvmove case it is NULL, here we poll for physical volume name).
The vg->lv_count parameter now includes always number of visible
logical volumes.
Note that virtual snapshot volume (snapshotX) is never visible,
but it is stored in metadata with visible flag.
The backup() call store metadata from memory.
But in cluster backup() call performs
remote nodes metadata backup and it reads data from disk.
For metadata backup consistency,
patch moves all backup() calls after vg_commit.
(Moreover, some tools already do that this way.)
It fails for 1k PE now.
Patch adds log_region_size into allocation habdle struct
and use it in _alloc_parallel_area() for proper log size calculation
instead of hardcoded 1 extent - which can fail.
Reproducer for incorrect log size calculation:
DEV=/dev/sd[bcd]
pvcreate $DEV
vgcreate -s 1k vg_test $DEV
lvcreate -m1 -L 12M -n mirr vg_test
https://bugzilla.redhat.com/show_bug.cgi?id=477040
The log size calculation is mostly copied from kernel code.
