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dmeventd is 'scanning' statuses in loop (most usually in 10sec
intervals) - and meanwhile it sleeps within:
pthread_cond_timedwait()
However this function call tends to wakeup sometimes a short amount of
time sooner - and our code still believe the 'right time' has not yet
arrived and basically for a moment 'busy-looped' on calling this
function - so for systems with 'clock_gettime()' present we obtain
time and we go 10ms to the future second - this avoids unneeded
repeated invocation of our time scheduling loop.
TODO: monitoring during 1 hour 'time-change'...
When _daemon_read()/_client_read() fails during the read,
ensure memory allocated withing function is also release here
(so caller does not need to care). Also improve code readbility a bit
a for same functionality use more similar code.
Since we fixed linking of proper version of 'libdevmapper' with
linking lvm2 plugin correctly - we already have correct function
available linked with internal lvm library.
So drop unneeded include of parsing function.
When a LV loses an interface it ends up getting removed and recreated.
This happens after the VGs have been processed and updated. Thus when
this happens we need to re-check the VGs.
VDO pool LVs are represented by a new dbus interface VgVdo. Currently
the interface only has additional VDO properties, but when the
ability to support additional LV creation is added we can add a method
to the interface.
This reverts commit ad560a286a.
The reverted patch also removed the warning which we realized we need
to keep as valuable process information (see related bugzilla below).
In a followup patch, we'll keep the message and avoid bailing out thus
always allowing lvconvert to try repairing if 'allocate' fault policy set.
Related: https://bugzilla.redhat.com/show_bug.cgi?id=1751887
With Python 3.8 converting these directly to string using str()
no longer works, we need to convert these to integer first.
On Python 3.8:
>>> str(dbus.Int64(1))
'dbus.Int64(1)'
On Python 3.7 (and older):
>>> str(dbus.UInt64(1))
'1'
This is probably related to removing __str__ function from method
from int (dbus.UInt is subclass of int) which happened in 3.8, see
https://docs.python.org/3.8/whatsnew/3.8.html
Signed-off-by: Vojtech Trefny <vtrefny@redhat.com>
To avoid tiny race on checking arrival of signal and entering select
(that can latter remain stuck as signal was already delivered) switch
to use pselect().
If it would needed, we can eventually add extra code for older systems
without pselect(), but there are probably no such ancient systems in
use.
Update the previous commit to leave the vgname as
an arg instead of moving it into the select option,
(the compound select option rule is confusing the
dlm arg processing.)
Using --select 'lvname=LV && vgname=VG' avoids the problem
of the lvchange exit code not distinguishing an actual error
result vs the VG or LV not existing. (This is in case there
is an odd dlm/gfs2 setup where some nodes are running the dlm
but do not have access to the VG.)
When lvextend extends an LV that is active with a shared
lock, use this as a signal that other hosts may also have
the LV active, with gfs2 mounted, and should have the LV
refreshed to reflect the new size. Use the libdlmcontrol
run api, which uses dlm_controld/corosync to run an
lvchange --refresh command on other cluster nodes.
When an LV is active with a shared lock, a command can be
run to change the LV with --lockopt skiplv (to override the
exclusive lock the command ordinarily requires which is not
compatible with the outstanding shared lock.)
In this case, other commands may have the LV active and may
need to refresh the LV, so print warning stating this.
Lvm can at times have duplicate names. When this happens the daemon will
internally use vg_name:vg_uuid as the name for lookups, but display just
the vg_name externally. If an API user uses the Manager.LookUpByLvmId and
queries the vg name they will only get returned one result as the API
can only accommodate returning 1. The one returned is the first instance
found when sorting the volume groups by UUID.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1583510
When we have two logical volumes which switch their names at the
same time we are left with incorrect lookups. Anytime we find
an entry by doing a lookup by UUID or by name we will ensure
that the lookups are indeed correct.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1642176
If there are two independent scripts doing:
vgchange --lockstart vg
lvchange -ay vg/lv
The first vgchange to do the lockstart will wait for
the lockstart to complete before returning.
The second vgchange to do the lockstart will see that
the start is already in progress (from the first) and
will do nothing. This means the second does not wait
for any lockstart to complete, and moves on to the
lvchange which may find the lockspace still starting
and fail.
To fix this, make the vgchange lockstart command
wait for any lockstart's in progress to complete.
