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Add a little wait loop - since lvconvert started background process
and we need to wait till this bg task initiate its work -
adding ~1s loop should give reasonable enough time to start mirroring.
This could be seen as continuation of
6cee8f1b06.
Some test maching with old udev system shows problem,
where udev 'jumps on' leg device after mirror target
releases its legs - since udev does not (in this old case) skips
such device from scanning - it opens device - and this prevent
leg device to be deactivated - effectively such device stays
'leaked' in DM table invisibly to lvm2 command.
So to 'combat' this issue - if the device has '_mimage' in its name,
the retry of deactivation is automatically assumed.
NOTE: wider impact is unexpected - as it's touching only old mirror
target which is nowadays replaced with 'raid'.
In case there will be some problem identified - probably both patches
should be reverted.
With older systems and udevs we don't have control over scanning of lvm2
internal devices - so far we set retry-removal only for top-level LVs,
but in occasional cases udev can be 'fast enough' to open device for
scanning and prevent removal of such device from DM table.
So to combat this case - try to pass 'retry' flag also for removal of
internal device so see how many races can go away with this simple
patch.
Note: patch is applied only to internal version of libdm so the external
API remains working in the old way for now.
Commit 813347cf84 added extra validation,
however in this particular we do want to trim suffix out so rather ignore
resulting error code here intentionaly.
Since the test is currently directly working with live directory,
which can be getting updates from system's udev - add wait
for settling so removal of all known PVs happens after that.
But still this has major influce on behavior of running system,
so the test should never be executed on a user used box.
Check that type is always defined, if not make it explicit internal
error (although logged as debug - so catched only with proper lvm.conf
setting).
This ensures later type being NULL can't be dereferenced with coredump.
When sanlock_release returns an error because of an i/o
timeout releasing the lease on disk, lvmlockd should just
consider the lock released. sanlock will continue trying
to release the lease on disk after the original request
times out.
The lvmlock LV size was not adjusted correctly for 512 vs 4K
sector sizes which influence the lease size used by sanlock.
When lvmlock was automatically extended, the zeroing through
bcache wasn't working.
Since the stats handle is neither bound nor listed before the
attempt to call dm_stats_get_nr_regions(), it will always return
zero: this prevents reporting of any dmstats regions on any
device.
Remove the dm_stats_get_nr_regions() check and instead rely on
the correct return status from dm_stats_populate() which only
returns 0 in the case that there are regions to inspect (and
which logs a specific error for all other cases).
Reported-by: Bryan Gurney <bgurney@redhat.com>
It doesn't make sense to test or warn about the region count until
the stats handle has been listed: at this point it may or may not
contain valid information (but is guaranteed to be correct after
the list).
lvm uses a bcache block size of 128K. A bcache block
at the end of the metadata area will overlap the PEs
from which LVs are allocated. How much depends on
alignments. When lvm reads and writes one of these
bcache blocks to update VG metadata, it can also be
reading and writing PEs that belong to an LV.
If these overlapping PEs are being written to by the
LV user (e.g. filesystem) at the same time that lvm
is modifying VG metadata in the overlapping bcache
block, then the user's updates to the PEs can be lost.
This patch is a quick hack to prevent lvm from writing
past the end of the metadata area.
This reverts commit 16ae968d24.
We need to come up with a better fix, because we fall short
wiping all known signatures when not using the wipe_lv API.
lvm metadata writes, commits and activations are performed
for (newly) allocated RAID metadata SubLVs to wipe any preexisiting
data thus avoid false raid superblock positives on RaidLV activation.
This process can be interrupted by command or system crashs
thus leaving stale SubLVs in the lvm metadata as a problem.
Because we hold an exclusive lock in this metadata SubLV wiping
process, we can address this problem by avoiding aforementioned
commits/writes/activations altogether wiping the respective first
sector of the first physical extent allocated to any metadata SubLV
directly via the existing dev_set() API.
Succeeds all LVM RAID tests.
Related: rhbz1633167
