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Refactor _start_daemon and add synchronization delay waiting
untill new forked dmeventd actually open fifos and is ready
to process messages.
This closes some race window in testing.
When no lock manager for the global lock had been set yet,
and the first global lock request was received, and both
dlm and sanlock were running, lvmlockd would assume it
should use the dlm for the global lock, and would start
the "lvm_global" dlm lockspace automatically. That's
not always correct, so don't assume the dlm should be used,
fail the lock request, and wait until a VG with a specific
lock type is started to determine the lock manager to use.
Detect also presence of 'vdoformat' tool.
Fallback to 'kvdo' modprobe only when dm-vdo fails
(removed ugly error message from log)
Also add extra check for scsi model being present
so the test can wait a bit if 'scsi_debug' takes longer time.
No need for 'aux' within aux.
Refactor existing code from tools/lvmcmdline.c to
libdaemon/server/daemon-stray.h daemon_close_stray_fds()
used to close stray descriptors above some specified Fd.
This is code parses content of /proc dir to minimize 'blind' closing
of all possible descriptors within rlimits range.
As we have the same code in few other places in it's more 'trivial'
version - these were actually sensitive to high amount of descriptors,
which might be configured on some system.
With this patch we effectively resolve this reported gitlab issue:
https://gitlab.com/lvmteam/lvm2/-/issues/5
TODO: Current placement might not be ideal - however considering
existing code base constrains it's not so simple.
ATM it uses lib/misc/lvm-file.h for custom_fds declaration
and rest of functinality is included in daemon header file.
Let's move proc into include/configure.h so this define can
be easily used across the source base.
Configure defines it - but ATM we do not provide any configure
option to change it - there should be no need to ever change it.
Handle the case, where we 'kill -9' running dmeventd,
and restarting 'dmeventd -R' manages to still contact this
'zombie' damone and manages to get list of monitored devices
out of this and eventually 'run' new and in this case
unexpected instance of dmeventd.
Some test do expect event_activation to be set.
So add explicit configuring of this setting in tests,
but also add new default which kind of does it globally
as it's expected default (yet our testing rpms might
be create with disabled event_activation)
By adding this to each test individually - it's now easy
to locate such tests...
Move static to main() local vars.
Initilize libdm logging also before starting _restart_dmeventd()
so function there can be also logged.
Move call of _info_dmevent() out of option processing - so some
options like -V are processed with higher priority.
Use _restart_dmeventd() with return values 0,1,2.
Also let's use already created fifos struct.
Make sure the _systemd_activation variable is properly initialized
from _systemd_handover before calling _restart_dmeventd() as
this variable is used there to decide where 1 or 2 should
be returned - aka either letting systemd to initilize
or restart dmeventd itself.
This is initial test how to disable event_activation on
machines, where lvm2-testsuite packages are installed
with its lvm.conf file.
TODO: find more elegant mechanism
Occasionally this test fails as soemtimes UUID actually
may constain LV[d] string causing it to grep mismatch
UUID and LV name and eventually fail test for wrong reason.
As a simple workaround print the LV name first and
check the name is followed by a space character.
This code is somewhat complex and involves recursion and pointer
shuffling which confuses coverity here.
Let's add masking comment for this warning as there is no double
free in this code.
Let's stop Coverity thinking here we are using freed FILE*
for anything else then comparing numbers.
For this use the original source of old_stream pointer.
