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Previously, lvmlockd detected the end of the lvmlock LV
by doing i/o to it until an i/o error was returned.
This triggered sanlock warning messages, so use the LV
size to avoid accessing beyond the end of the device.
Previously, every lvcreate would refresh the lvmlock LV
in case another machine had extended it. This involves
a lot of unnecessary work in most cases, so now compare
the LV size and device size to detect when a refresh is
needed.
lvremove of a thin lv while the pool is inactive would
leave the pool locked but inactive.
lvcreate of a thin snapshot while the pool is inactive
would leave the pool locked but inactive.
lvcreate of a thin lv could activate the pool to check
a threshold before the pool lock was acquired in lvmlockd.
The lv_hash wasn't being passed to the seg-specific text import
functions, so they were doing many find_lv() calls which consumes
a lot of time when there are many LVs in the metadata.
While performing udev sync semaphore's inc/dec operation, we use the
result from GETVAL semctl just to print a debug message with current
value of that sempahore, nothing else.
If the GETVAL fails for whetever reason while the actual inc/dec
completes successfully, just log a warning message about the GETVAL
(and print the debug messages without the actual semaphore value)
and return success for the inc/dec operation as a whole.
Clean up udev sync semaphore on fail path during its creation, otherwise
the caller will have no handle returned to clean it up itself and the
semaphore will keep staying in the system. The only way to clean it up
would be to call `dmsetup udevcomplete_all` which would destroy all
udev sync semaphores, not just the failed one, which we don't want.
The same message is printed while performing create/inc/dec operation and
the GETVAL semctl fails. Add a prefix so we know exactly in which of
these functions the issue actually happened.
LV with pvmove_ prefix is not allowed to be created by user
so bigger chance our selected name will never exist.
TODO: probably add code to get generic unused LV name...
Older gcc doesn't really like complex types (buffer, struct) to be
initialized without extra {} around such type.
So pick any other 'single type' var from a struct and set it to 0,
rest will do the compiler without emitting a warning.
Revert 373372c8ab and instead update
our validation code to handle LVs with empty segment - currently
we should need this only for pvmove operation, thus such LV should
have name 'pvmove%u'.
This fixes a problem where user tried i.e. pvmove on a VG with single
PV - as reported: https://github.com/lvmteam/lvm2/issues/148
Reported-by: bob@redhat.com
