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Recent change 2c8d6f5c90
actually droped restart when the reason of failing open is missing
device completely - check for ENOENT now as another reason
to start new dmeventd server (when there is no systemd to maintain it).
The udev_device_get_is_initialized is available since libudev version
165. Older versions are still used somewhere (e.g. RHEL6). So better
check for this fn and use it only if it's available.
Udev db records are marked as not initialized (incomplete) on timeout.
Issue an error message whenever LVM finds such records so users are
aware that something's going wrong with udev db.
This is important in case we use devices/external_device_info_source="udev"
where udev database records are used to do various filtering decisions.
For example:
udev log of timed out worker:
Nov 11 13:02:25 raw.virt systemd-udevd[607]: seq 1997 '/devices/virtual/block/dm-2' is taking a long time
Nov 11 13:04:25 raw.virt systemd-udevd[607]: seq 1997 '/devices/virtual/block/dm-2' killed
Nov 11 13:04:25 raw.virt systemd-udevd[607]: worker [11221] terminated by signal 9 (Killed)
Nov 11 13:04:25 raw.virt systemd-udevd[607]: worker [11221] failed while handling '/devices/virtual/block/dm-2'
...
LVM also issues error message visibly if incomplete udev db record is found,
devices/external_device_info_source="udev" is set:
$ pvs
Udev database has incomplete information about device /dev/dm-2.
Failed to get external handle for device /dev/dm-2 [udev].
...
Coverity noticed this condition is always false and the error
path could never be visited.
So check for all mismatches of supported messages
and actually mark log_error as internal error.
When the first arg is a UUID and vgrename translates
that UUID to a current VG name, the old and new VG
names are not being checked for equality. If they
are equal, it produces an internal error rather than
a proper error.
Use delay_dev to slow down mirror sync so we could more
easily check for race and proper reject of parallel mirror
leg addition/reduction.
Also expose fail in mirror allocation of parallel leg.
Rather then skipping whole test - just do not use it.
Failing tests that have required delay need to deal with reality
and shell either check for HAVE_DM_DELAY and skip portion
of test or using should when needed.
While through all codepaths we never 'read' lock_id unless LCKF_CONVERT,
coverity cannot decrypt this.
As since it's usually better to pass in 'well-defined' data structures
preset lock_id to 0.
Use fputs() when printing plain string,
easier then fprintf which needs to parse it.
Also check fd before close is >= 0 -
it is - but coverity fail to see it, so eliminate
this false-positive warning.
Doing 'stat' checking first and later opening is racy.
And since we do not really care about any 'status' info
here and we read 'sysfs' here - just drop whole 'stat()'
call and directly handle error from failing 'fopen()'.
