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Revert the lvmlockd.c changes from:
commit 0bf836aa14
"tidy: prefer not using else after return"
The commit introduced at least one regression, which broke
lvcreate of a thin pool in a shared VG.
When file-locking mode failed on locking, such description was leaked
(typically not an issue since command usually exists afterwards).
So shirt close() at the end of function and use it in all error paths.
Also make sure, when interrrupt is detected, it's really not holding
lock and returns 0.
lvmcache_foreach_mda() can fail for numerous reasons
and failing error code cannot be ignored (out-of-memory...)
TODO: might need more error handling tunning.
After the internal lvmlock LV (holding sanlock leases) is
extended to hold more leases, it needs to be zeroed.
sanlock expects to see either zeroed blocks or blocks
initialized with leases.
Fix code checking that the 2nd mda which is at the end of disk really
fits the available free space and avoid any DA and MDA interleaving when
we already have DA preallocated. This mainly applies when we're restoring
a PV from VG backup using pvcreate --restorefile where we may already have
some DA preallocated - this means the PV was in a VG before with already
allocated space from it (the LVs were created). Hence we need to avoid
stepping into DA - the MDA can never ever be inside in such case!
The code responsible for this calculation was already in
_text_pv_add_metadata_area fn, but it had a bug in the calculation where
we subtracted one more sector by mistake and then the code could still
incorrectly allocate the MDA inside existing DA. The patch also renames
the variable in the code so it doesn't confuse us in future.
Also, if the 2nd mda doesn't fit, don't silently continue with just 1
MDA (at the start of the disk). If 2nd mda was requested and we can't
create that due to unavailable space, error out correctly (the patch
also adds a test to shell/pvcreate-operation.sh for this case).
Previously the cache remembered an existing bootloaderarea and
reinstated it (without even checking for overlap) when asked to
write out the PV. pvcreate could write out an incorrect layout.
Avoid adding -g more then once for debug builds.
Avoid enabling DEBUG_MEM when we build multithreaded tools.
Link executables with -fPIE -pie and --export-dynamic LDFLAGS
Introduce PROGS_FLAGS to add option to pass flags for external libs.
Link lvm2 internally library only when really used.
Link DAEMON_LIBS with daemons.
Pass VALGRIND_CFLAGS internally
Set shell failure mode on couple places.
lvm2 warned about zeroing and too big chunksize (>=512KiB), but
only during lvconvert, so lvcreate was creating thin-pools
without any warning about possible slowness of thin provisioning
because of zeroing.
Since _deactivate_and_remove_lvs() is used in more then one place,
move the needed udev synchronization into this function so other
users automatically get correct fs state before next dm manipulation.
Assumption here is that this udev synchronization 'delay' may also
prevent to 'early' table reloads which might cause kernel problems
for md-core - but we may need more generic time-limited reload
frequency for raid devices.
Note: on udev-less system there will be almost no delay.
API for strtod() or strtoul() needs reset of errno, before it's being
called. So add missing resets in missing places and some also some
errno validation for out-of-range numbers.
Switch from warn to log_error since this generated
failing return code for command so printing log_error()
is mandatory.
Happens with i.e. pvscan --cache meets crashing lvmetad.
Commit 34504855a7 introduced
flag LV_RESHAPE_DATA_OFFSET and used it to avoid incompatible
activation on older runtime.
Enhance vg_validate() raid checking functions with checks for it.
In order to reject out of place reshaping with segment data_offset
field on old runtime, add a respective segment type incompatibility
flag causing "+RESHAPE_DATA_OFFSET" to be suffixed to the segment
type name.
When reshape space is allocated anew, an update and reload is needed to
promote the new size to the cluster node with the exclusively active RaidLV
or reloading the RaidLV will fail with a size related error. Additionally,
store "data_offset <sectors>" with the RaidLV in the lvm2 metadata so that
it can be retrieved on cluster nodes.
Process allocation of reshape space on a 2-legged raid4/5 (interim layout
to convert from/to linear via raid1) properly in the cluster.
Resolves: rhbz1461562
Resolves: rhbz1448116
If the activation step in lvcreate fails (e.g. the specified
minor number is already used), then the lvcreate is reverted,
but the LV lock in lvmlockd was not being unlocked or properly
freed.
Some lvconvert commands can be used directly on the data sublv:
lvconvert ... vg/pool_tdata
The correct LV lock to use in lvmlockd is the one on the pool LV.
