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An idea from Zdenek for better ensuring valid hints by invalidating
them when pvscan --cache <device> sees a new PV, which is a case
where we know that hints should be invalidated. This is triggered
from systemd/udev logic, and there may be some cases where it would
invalidate hints that the existing methods wouldn't detect.
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.
Save the list of PVs in /run/lvm/hints. These hints
are used to reduce scanning in a number of commands
to only the PVs on the system, or only the PVs in a
requested VG (rather than all devices on the system.)
The systemd generators are executed very early during the switch
from initramfs to system partition and the syslog is not yet fully
operational - it may cause blocking, if some debug logging is enabled
at the same time in /etc/lvm/lvm.conf log{} section.
To avoid timeouting and killing this generator - rather enhance lvm
code to suppress any syslog communication when LVM_SUPPRESS_SYSLOG
envvar is set.
Use of this envvar is needed since the parsing of i.e. cmdline options
that could eventually override lvm.conf setting happens in this case
way too late and number of lines could have been already streamed to
syslog.
Fix a scenario where global/event_activation setting is not found. In
this case we need to take default value just like lvm tools do when
executed. So use "lvmconfig --type full".
Also, if we fail to execute lvmconfig for whatever reason, fallback to
generating the activation units as failsafe action.
Reported by: Bastian Blank <waldi debian org>
When initializing an LV to hold the writecache, use wipe_lv()
which looks for specific signatures on the LV.
Wiping signatures is not necessary, but printing a warning
that names a specific signature (in addition to the existing
generic warning/confirmation) may help if a user accidentally
specifies the wrong LV which contains something important.
Detach function return 0 for error and 1 for success.
Add missing log errors from failing deactivation.
Add missing log error from failing synchronization.
In few cases error paths from initialization were returned as
'success == 1'.
Also assing num_mb with single compare checking valid sector_size.
For dumb compiler make num_mb always defined.
Since configure.h is a generated header and it's missing traditional
ifdefs preambule - it can be included & parsed multiple times.
Normally compiler is fine when defines have same value and there is
no warning - yet we don't need to parse this several times
and by adding -include directive we can ensure every file
in the package is rightly compile with configure.h as the
first header file.
If we are running the test where the device is /dev/* we will will
run the unit tests 'test_nesting' and 'test_pv_symlinks'. Otherwise
we will skip them.
When a VG is exported, the 'fullreport' returns an exit code of 5, but
otherwise returns the data we are wanting.
Signed-off-by: Tony Asleson <tasleson@redhat.com>
In some cases we get stuck where we are unable to retrieve the current
state of lvm as we are encountering an error. When the error is
persistent we will log and exit the daemon instead of consuming vast
amounts of resources.
Signed-off-by: Tony Asleson <tasleson@redhat.com>
Drop very old original format of VDO target and focus on V2 version.
So some variables were renamed or replaced.
There is no compatibility preserved (with assumption so far this is
experimental feature and there is no real user).
Note - version currently VDO calls this version 6.2.
A bit of chicken & egg problem - dmeventd needs to use old libdm library.
VDO is only part of new device_mapper internal library.
So include directly source file for parsing status - this fixes usability
problem of VDO plugin introduced with previous Makefile reshaping
patchset.
NOTE: source file needs to be keep then compilable in both environments.
Also add missing copyright header.
