There are additional conditions which SPDK tracks,
that are known before issuing call to OCF.
Two main ones are:
- if vbdev->ocf_cache was not yet created [start_cache()]
- if the cache bdev was opened [attach_base()]
Both happen for the first cache bdev once. Then for
consecutive vbdev_ocf on same cache bdev, reference
will be copied.
This call will simplify checking both conditions.
Calling into OCF with NULL or stale ocf_cache pointer,
rightly so will cause issues with ASAN.
Related #1498
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Change-Id: Ib202c15bda4cbbffa1516c69168e8bfb80370047
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/3573
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Vitaliy Mysak <vitaliy.mysak@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
868ba17780