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The env variable LVM_DBUSD_PV_DEVICE_LIST when present and filled in
with at least 4 physical devices will run concurrently with other
instances running as long as they specify different devices in their
env variable.
When the env variable is not present the test runs as it did before.
In preparation to have more than one thread issuing commands to lvm
at the same time we need to serialize updates to the dbus state and
retrieving the global lvm state. To achieve this we have one thread
handling this with a thread safe queue taking and coalescing requests.
Looks like this isn't support across versions. Need to add functionality
to service to return the supported segment types, so we only use the
supported ones.
There are two possible errors in _dm_stats_populate_region():
* No region struct in dms->regions[region_id]
* Failure to parse data from @stats_print
These have very different causes: the first occurs where a client
program is populating one region at a time (region_id is a single
region identifier), and has not previously called dm_stats_list()
to dimension the region tables; this is an API usage error.
The second occurs when either we read unparseable data from the
kernel (kernel bug), or where various resource allocations fail.
Separate these two cases out and log separate messages for each
(allocation failures in the path already have their own distinct
message), since the "failed to parse.." message in the un-listed
handle case is confusing and misleading.
Do not emit warning message but only log debug message if
lvm2-lvmdbusd.service unit is missing and at the same time
we have global/notify_dbus=1 (which is used by default if we
configured sources with "--enable-notify-dbus"). We don't want
hard dependency between LVM2 and lvmdbusd so it's enough to log
only debug message in this case.
0 interval leads as of now to a busy loop with lvmetad and command.
Avoid testing this patological case.
TODO: Code should possibly translate zero interval into some small
sleep. With lvmpolld it's already 1/10s
Add new targets:
make check_lvmpolld
make check_cluster_lvmpolld
make check_lvmetad_lvmpolld
make check_all_lvmpolld
So check_lvmetad runs only base lvmetad test - to much
logic of remaining targets.
Previous behavior is available via check_all_lvmpolld.
Make it easier to replace missing segments with 'zero' returning
target - otherwise user would have to create some extra target
to provide zeros as /dev/zero can't be used (not a block device).
Also break code loop when segment is found and make it an INTERNAL_ERROR
where it's missing.
Instead of clearing multiple rmeta device with sequential activation
process and waiting for udev for every _rmeta device separately,
activate all _rmeta devices first and then clear them and deactivate
afterwards.
Also update some tracing messages.
When anyhing goes wrong during clearing process, always try to
deactivate as much _rmeta devices as possible before fail.
This code is no longer needed because the back ground task has been
removed. Will add back if we change the design and end up utilizing
multiple worker threads.
There is no reason to create another background task when the task that
created it is going to block waiting for it to finish. Instead we will
just execute the logic in the worker thread that is servicing the worker
queue.
Translate log_info() into log_very_verbose() which is macro
supposed to be used by our code.
log_info() is internal macro with eventually some 'symbolic' meaning
in syslogging daemons.
Instead of compiling 2 log call for 2 different logging functions,
and runtime decide which version to use - use only 'newer' function
and when user sets his own OLD dm_log logging translate it runtime
for old arg list set.
The positive part is - we get shorter generated library,
on the negative part this translation means, we always have evaluate
all args and print the message into local on stack buffer, before
we can pass this buffer to the users' logging function with proper
expected parameters (and such function may later decide to discard
logging based on message level so whole printing was unnecessary).
Ensure different logging function for dmeventd.c logging
and dm and lvm library.
We can recognize we want to show every log_info() and
log_notice() message from dmeventd.c code while not
exposing those from libdm/libdevmapper-event
Also switch to use log with errno - it's not changing
anything and doesn't bring any more features yet to dmeventd
logging but we just properly pass dm_errno_or_class properly
through the whole code stack for possible future use
(i.e. support of class logging for dmeventd).
Reword the logging logic and try to restore previous logging
behavior for 'standalone' running daemon while preserving
debuggable feautures it has gained.
So actual rules:
dmeventd without any '-d' option will syslog all messages
from dmeventd.c it dmeventd plugins.
log_notice()==log_verbose()
log_info()==log_very_verbose()
But to show also log_debug() used has to give '-ddd'.
When user specified '-d, -dd, -ddd, -dddd' it
will also enable tracing of messages from libdm & lib
executed code - which is mainly useful for testing
i.e.: 'dmeventd -fldddd'
Introduce macros:
log_level(), log_stderr(), log_once(), log_bypass_report()
For easier and more consisten way how to 'decoder' bits
of info from passed 'level'.
This patch fixes potential problem when 'level' of message
might not have always masked right bits.
Instead of creating a thread to handle the case where a client
is calling job.Wait, we will utilize a timer. This significantly
reduces the number of threads that get created and destroyed while
the service is running.
We will fetch the lvm state in non-main thread and only process the new
data with the main thread to prevent hanging the main thread event loop.
ref. https://bugs.freedesktop.org/show_bug.cgi?id=98521
